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Of temperature or pressure of device or component thereof

Subclass of:

347 - Incremental printing of symbolic information

347001000 - INK JET

347005000 - Controller

Patent class list (only not empty are listed)

Deeper subclasses:

Class / Patent application numberDescriptionNumber of patent applications / Date published
347018000 With particular cooling means 33
Entries
DocumentTitleDate
20090219325PRESSURE-REGULATING CHAMBER FOR GRAVITY CONTROL OF HYDROSTATIC INK PRESSURE AND RECYCLING INK SUPPLY SYSTEM - A pressure-regulating chamber for maintaining ink contained in the chamber at a predetermined first level relative to a printhead. The chamber comprises: an inlet port for connection to an ink reservoir via an ink supply line; an outlet port for connection to an ink inlet of the printhead via an upstream ink line; a return port for connection to an ink outlet of the printhead via a downstream ink line; a snorkel extending from the return port and terminating at a snorkel outlet positioned above the first level of ink; an air vent open to atmosphere; and a float valve for maintaining the predetermined first level of ink by controlling a flow of ink into the inlet port.09-03-2009
20120200630REDUCTION OF BUBBLES AND VOIDS IN PHASE CHANGE INK - Bubble mitigation approaches for phase change ink involve creating a thermal gradient along an ink flow path of an ink jet printer during a time that the ink is undergoing a phase change. The thermal gradient causes one portion of the ink in the ink flow path to be in liquid phase while another portion of the ink is in solid phase. The thermal gradient allows the liquid ink to move along the ink flow path to fill in voids and/or to push out air pockets in the portion of the ink that is still solid. The bubble mitigation process may be implemented during a start-up operation when the ink is transitioning from a solid phase to a liquid phase and/or during a power down operation when the ink is transitioning from a liquid phase to a solid phase.08-09-2012
20110193911METHOD OF MINIMIZING KOGATION IN THERMAL INKJET PRINTHEADS - A method of minimizing kogation of a heater element in a thermal inkjet printhead. The method comprises the steps of: (i) supplying an inkjet ink to a nozzle chamber of the printhead; and (ii) repeatedly actuating a heater element in the nozzle chamber so as to heat a portion of the ink to a temperature sufficient to form a bubble therein, thereby causing droplets of ink to be ejected from a nozzle opening associated with the nozzle chamber. The ink comprises an acrylic polymer having a glass transition temperature (T08-11-2011
20120176438INKJET RECORDING APPARATUS - An inkjet recording apparatus that suppresses temperature rising of a recording head to decrease standby time when the recording head is high in temperature, thereby reducing a drop in recording speed and degradation in image quality. The inkjet recording apparatus includes a recording head configured to have a discharge port surface in which a discharge port for discharging ink is formed, a temperature sensor configured to detect temperature of the recording head, and a cleaning unit configured to make contact with the recording head to clean the discharge port surface. The inkjet recording apparatus controls whether to make the cleaning unit contact the discharge port surface based on the recording head temperature detected by the temperature sensor.07-12-2012
20100073417Heated Drum Assembly Having A Multiple Speed Fan For Use In A Printer - A heated drum assembly enables improved thermal control of a hollow drum in the heated drum assembly by selectively directing air flow from a fan to different portions of the hollow drum. The heated drum assembly includes a hollow drum having a circumferential wall that defines an outer boundary for an internal cavity, the hollow drum having a first end and a second end and a longitudinal axis about which the hollow drum rotates, at least two stationary heaters that are located within the internal cavity of the hollow drum to heat the circumferential wall as it passes by the heaters, one of the two stationary heaters being located near one end of the hollow drum and the other stationary heater being located near the other end of the hollow drum, a fan located at one of the two ends of the hollow drum, at least two temperature sensors, one temperature sensor being located proximate one of the two ends of the hollow drum, and the other temperature sensor being located proximate the other of the two ends of the hollow drum, each sensor generating a signal indicative of a temperature proximate the temperature sensor, and a controller coupled to the heaters, the fan, and the two temperature sensors, and configured to control a temperature of the circumferential wall of the drum to a set point, the controller activating at least one of the heaters in response to a signal from at least one of the temperature sensors indicating a temperature below a first predetermined temperature threshold, and operating the fan at one of at least three speeds in response to a predetermined relationship between the two temperature signals generated by the temperature sensors and a second predetermined threshold.03-25-2010
20130083115INKJET PRINTING SYSTEM WITH CONDENSATION CONTROL SYSTEM - Methods for operating a printing system are provided. In one method, an inkjet printhead that is positioned by a support structure is caused to emit droplets of an ink including vaporizable carrier fluid toward a target area to emit droplets according to image data and a shield is used to separate the support structure from the target area to form a first region between the support structure and the shield and a second region between the shield and the target area with the shield providing an opening between the first region and the second region to allow the inkjet printhead to jet droplets to the target area. The shield is heated to a temperature that is at least equal to a condensation temperature of the vaporized carrier fluid in the second region.04-04-2013
20080204501INKJET PRINT HEAD PRESSURE REGULATOR - An apparatus for use with an inkjet delivery system that comprises a negative pressure mechanism proximate to an inkjet print head that is adapted to apply a negative pressure on ink residing at the inkjet print head, and a controller coupled to the negative pressure mechanism that is adapted to controllably set the negative pressure on the ink at the inkjet print head.08-28-2008
20100045728LIQUID EJECTION APPARATUS - A liquid ejection apparatus includes a heater controller and a purge controller. The heater controller controls a heater to heat liquid in at least a part of a liquid path of a head when an ambient temperature of the head is lower than a first predetermined temperature. The purge controller controls a pressurizer so that: the pressurizer is continuously driven until a predetermined amount of liquid is ejected from ejection openings, when the ambient temperature is not lower than the first predetermined temperature; and the pressurizer is intermittently driven plural times until the predetermined amount of liquid is ejected from the ejection openings, when the ambient temperature is lower than the first predetermined temperature, an amount of liquid ejected from the ejection openings in response to a single driving action of the pressurizer being not larger than an amount of liquid heated by the heater.02-25-2010
20130135380INK JET PRINTING APPARATUS AND METHOD FOR CONTROLLING INK JET PRINTING APPARATUS - An ink jet printing apparatus including a plurality of print heads and a method for controlling the ink jet printing apparatus are provided which allows ink ejection to be immediately started. If temperatures of both a first print head and a second print head have become equal to or higher a reference temperature at least once, a printing operation or a preliminary ejection operation using the first print head and the second print head is started even when one of the temperature of the first print head and the temperature of the second print head is lower than the reference temperature.05-30-2013
20100066784LIQUID EJECTING APPARATUS - A liquid ejecting apparatus, including: a liquid ejecting head having a plurality of liquid-ejection openings, a liquid channel, and a plurality of actuators; an inflow liquid temperature sensor which detects a temperature of a liquid to be flowed into the liquid channel from an outside; a driver IC which is disposed so as to be thermally connected to the liquid ejecting head, which includes a signal producing circuit configured to produce an ejection signal, a non-ejection signal, and a vibration signal; and a controller including: a storing section configured to store drive data of the plurality of actuators; a first estimating section configured to estimate a first heat amount; a second estimating section configured to estimate a second heat amount; and a signal-producing-circuit controlling section configured to cause the signal producing circuit to produce the ejection signal, the non-ejection signal, and the vibration signal, wherein the signal-producing-circuit controlling section controls the signal producing circuit such that an increased heat amount exceeds a third heat amount.03-18-2010
20100066783CONVERTIBLE PRINTER - A convertible printer usable with either a flexible media or rigid media is disclosed.03-18-2010
20090303275DROPLET DISCHARGE DEVICE, METHOD FOR DISCHARGING DROPLET AND METHOD FOR MANUFACTURING ELECTRO-OPTICAL DEVICE - A droplet discharge device includes: a discharge unit discharging a droplet; an information obtaining unit obtaining workload information of the discharge unit while a predetermined pattern is formed on a discharged object; a temperature calculation unit calculating a prediction temperature of the discharge unit while the pattern is formed based on the workload information obtained by the information obtaining unit; and a temperature control unit controlling a temperature of the discharge unit at the prediction temperature calculated by the temperature calculation unit. In the device, the discharge unit and the discharged object of the droplet are relatively moved so as to form the predetermined pattern on the discharged object.12-10-2009
20090303274DROPLET DISCHARGE DEVICE, METHOD FOR DISCHARGING DROPLET, METHOD FOR FORMING PATTERN, PATTERN FORMED MEMBER, ELECTRO-OPTICAL DEVICE, AND ELECTRONIC APPARATUS - A droplet discharge device includes: a head driven to discharge a functional liquid as a droplet; a driving voltage generation unit that generates a driving voltage to drive the head; a first temperature acquisition unit to acquire a temperature of the functional liquid in the head as a first temperature in a case where the head is in a head waiting state in which the head is waited; a second temperature acquisition unit to acquire a temperature of the functional liquid in the head as a second temperature in a case where the head is in a head driven state in which the head is driven; a temperature difference computing unit that computes a temperature difference between the first temperature and the second temperature; and a driving voltage correction unit that corrects the driving voltage based on the temperature difference. The driving voltage generation unit generates the corrected driving voltage to the head in a case where the head is in the head driven state.12-10-2009
20090040259INKJET IMAGE FORMING APPARATUS - An inkjet image forming apparatus includes a stabilization circuit to stabilize operations of a thermal shutdown circuit simultaneously restricting noise induced in a thermal shutdown circuit. The stabilization circuit includes a pair of PMOSFETs. The PMOSFETs are connected between a power-supply signal of the thermal shutdown circuit and a ground terminal, and serve as a current source and a resistor. The voltage applied to a gate of the pair of PMOSFETs is equal to a voltage applied to the thermal shutdown circuit, so that a circuit configuration is simplified. This voltage is higher than a minimum turn-on voltage of the PMOSFETs, and current signals flowing in the pair of PMOSFETs are approximately equal to each other.02-12-2009
20090040258INKJET IMAGE FORMING APPARATUS AND METHOD OF CONTROLLING THE SAME - A plurality of temperature sensors is provided adjacent to a plurality of nozzles formed in a print head. The temperature sensors are operated according to address information to select the sensor to measure the temperatures of the nozzles. The measured temperatures are compared with a reference temperature such that a missing nozzle is detected. At the time of printing, compensation is provided for the missing nozzle.02-12-2009
20110063358INK JET PRINTING APPARATUS AND DRYING CONTROL METHOD FOR THE SAME - An ink jet printing apparatus according to the present invention includes a dryer configured to dry ink on a print medium. The dryer includes a heating unit configured to heat air in the dryer, and an outside air adjustment mechanism configured to adjust the amount of outside air introduced into the dryer. When the outside air adjustment mechanism is controlled so that the outside air introduction amount is increased, before the control of the outside air introduction amount, the heating unit is controlled so that heated air heated by the heating unit is preheated to a second target temperature higher than a predetermined first target temperature for a normal operation. Even if the outside air introduction amount is actually increased to temporarily reduce the temperature of heated air, the temperature of the heated air can be maintained at a value required for sufficient drying.03-17-2011
20110063357SYSTEM AND METHOD FOR COMPENSATING FOR REGISTRATION ERRORS ARISING FROM HEATED ROLLERS IN A MOVING WEB PRINTING SYSTEM - A method compensates for thermal expansion of rollers in a web print zone. The method includes receiving an angular velocity signal from a first encoder for a roller in a print zone of a moving web printing system, receiving a signal from a first temperature sensor corresponding to a temperature of the roller, modifying a first diameter for the first roller with a first predetermined distance in response to the temperature of the first roller being different than a first predetermined temperature, identifying a velocity of a moving web in the print zone of the moving web printing system with reference to the modified first diameter, and delivering a firing signal to a first printhead proximate the first roller to energize the inkjet nozzles in the first printhead and eject ink onto the web at a position corresponding to the identified moving web velocity.03-17-2011
20130162714INKJET RECORDING METHOD - An inkjet recording method included a feeding step of feeding a recording medium, a jetting step of jetting aqueous ultraviolet-curable ink onto the recording medium, a humidity controlling step of controlling the amount of moisture on the surface on the recording side of the recording medium after the jetting step in such a way that a difference between the amounts of moisture on the surface on the recording side of the recording medium after the jetting step and during the feeding step becomes equal to or greater than 2 g/m06-27-2013
20090027437LIQUID EJECTING APPARATUS AND LIQUID EJECTING METHOD - A liquid ejecting apparatus includes a plurality of heads that eject liquids, a plurality of driving signal generating units that are disposed in the plurality of heads and generate driving signals used for driving the plurality of heads, a temperature control unit that controls temperatures of the liquids, a supply path that supplies the liquids of which temperatures are controlled by the temperature control unit to the plurality of heads, and a controller that changes the driving signals, which are generated by the plurality of driving signal generating units corresponding to the plurality of heads, based on the temperatures of the liquids in the plurality of heads.01-29-2009
20080297554TEMPERATURE REGULATED INKJET PRINTHEAD - A printhead IC is provided which has an array of nozzles, drive circuitry for receiving print data and sending drive pulses of electrical energy to the array of nozzles in accordance with the print data, and a temperature sensor connected to the drive circuitry to adjust the drive pulse profile in response to the temperature sensor output. During use, the temperature sensor can be de-activated after a period of use. The drive circuitry sets the duration of the pulse profile to a sub ejection value for any of the nozzles in the row that are not to eject a drop during that firing sequence.12-04-2008
20080297553LIQUID EJECTING APPARATUS - A liquid ejecting head unit includes head main bodies capable of ejecting liquid droplets from nozzle openings by applying pressure to liquid inside pressure generating chambers communicated with the nozzle openings. Liquid flow paths that are formed for the head main bodies connect the nozzle openings including the pressure generating chambers and storage members that store liquid to be supplied to the pressure generating chambers. Heating members are disposed in the vicinity of the liquid flow paths and heat the liquid flowing through the liquid flow paths. A control unit controls the heating members. Temperature detecting units detect temperatures of the liquid flowing through the liquid flow paths. The control unit controls the heating members based on the temperatures of the liquid, which are detected by the temperature detecting units and lengths of the liquid flow paths extending from the storage members to the head main bodies12-04-2008
20120236062RECORDING APPARATUS - A recording apparatus includes a carriage, a chamber room, a heating part and an agitating part. A recording head is mounted on the carriage. The chamber room covers the carriage while allowing a nozzle face of the recording head to be exposed. The heating part is configured and arranged to heat an atmosphere inside of the chamber room. The agitating part is configured and arranged to agitate the atmosphere heated by the heating part.09-20-2012
20090122098Inkjet printer - An inkjet printer is provided. The inkjet printer includes inkjet head for ejecting ink; a positioning unit which positions a recording medium at a recording position to which the ink is ejected from the inkjet head; a platen which supports the recording medium positioned at the recording position from an opposite side of the inkjet head; a heater which heats the platen at a position corresponding to at least an end portion of the recording medium positioned at the recording position; and a control unit which controls the heater to turn on and off.05-14-2009
20090295858LIQUID BODY DISCHARGE DEVICE AND LIQUID BODY DISCHARGE METHOD - A droplet discharge device includes: a discharge unit discharging a droplet and being moved relatively to a discharged object, on which the droplet is discharged, so as to form a predetermined pattern on the discharged object; a discharge amount measurement unit measuring a discharge amount of the droplet discharged from the discharge unit; a temperature acquisition unit acquiring a temperature of the discharge unit in the formation of the predetermined pattern; a temperature adjustment unit adjusting the temperature of the discharge unit; and a discharge amount adjustment unit adjusting the discharge amount of the discharge unit. In the device, the temperature adjustment unit adjusts a temperature of the discharge unit in the measurement of the discharge amount by the discharge amount measurement unit to the temperature in the formation of the predetermined pattern.12-03-2009
20110216119INK-JET PIGMENT INK AND INK-JET RECORDING METHOD USING THE SAME - An ink jet pigment ink having at least one low-molecular compound represented by specific formulae and a polymer having at least one polyethylene oxide block structure, wherein a viscosity of the ink-jet pigment ink at 65° C. increases to 100 mPa·s or more in response to heating.09-08-2011
20090195588IMAGE FORMING APPARATUS AND CONTROL METHOD OF THE SAME - An image forming apparatus performs an image forming operation by driving a ejecting element of a recording head with an ink ejecting drive voltage for ejecting ink, detects a temperature of ink to be flown into the recording head and a temperature of ink to be discharged respectively with a first temperature detection section and a second temperature detection section, and corrects the ink ejecting drive voltage on the basis of a temperature of ink being heat-transferred with the ejecting element, which is estimated with a predetermined conversion formula on the basis of the detected ink temperatures, for controlling an ink amount to be ejected.08-06-2009
20110261103Liquid jetting head and liquid jetting apparatus - A liquid jet head includes: a head chip (10-27-2011
20090189941Systems and Methods of Priming a Fluid Dispenser - A method of priming a fluid-dispensing head includes heating a fluid in fluid pathways of the fluid-dispensing head prior to fluid-dispensing operations to increase a surface area of gas bubbles in the fluid pathways. A fluid-dispensing head includes a plenum configured to house fluid; at least one dispensing head orifice in fluid communication with the ink plenum; and at least one heating element configured to heat fluid in the head such that gas bubbles disposed within the fluid increase in surface area.07-30-2009
20090147040Printer and control method thereof - An inkjet printer includes an inkjet head configured to perform printing on a printing sheet by use of ink. The inkjet printer includes: a heater configured to heat the ink; a thermometer configured to measure the temperature of the ink; and a controller configured to control the amount of electric power to be supplied to the heater and to control the inkjet head. In a case where the measured value of the ink temperature measured by the thermometer is in a range of a first reference temperature inclusive to a second reference temperature exclusive, the controller calculates a coverage rate of a page to be printed, and accordingly changes the amount of electric power to be supplied to the heater depending on the coverage rate thus calculated.06-11-2009
20090309913PRINTING HEAD SUBSTRATE, INK JET PRINTING HEAD AND INK JET PRINTING APPARATUS - There are provided a printing head substrate, an ink jet printing head and an ink jet printing apparatus, which accurately detect a temperature state in the central part of a heater array on the substrate and restrict an area of the substrate to a minimum. A printing head substrate has a plurality of heating elements, a plurality of ink supply openings, a logic circuit for driving the heating elements; a substrate temperature detecting element for detecting a temperature of the printing head substrate, and input and output pads for carrying out reception and supply of a signal between a printing apparatus, and the logic circuit and the substrate temperature detecting element, wherein a beam integral with the substrate is provided between the plurality of ink supply openings, and the substrate temperature detecting element is arranged on the beam.12-17-2009
20090309914RECORDING APPARATUS - A recording apparatus for performing recording by scanning a recording head includes an acquisition unit configured to acquire temperature information of the recording head, a generation unit configured to generate a signal that indicates outputting of an output voltage based on the temperature information, a voltage control unit configured to control a voltage to be output to the recording head based on the signal, and a control unit configured to simultaneously perform preliminary ejection processing in an interval between a previous scan and a next scan of the recording head and output processing of the signal.12-17-2009
20090207204Printing apparatus capable of adjusting ink temperature - A printing apparatus is capable of printing images by ejecting ink droplets from nozzles. The printing apparatus includes: a drive signal generation unit which generates ejectable drive pulses for ejecting ink droplets based on image data indicating the number of ink droplets for each pixel, and outputs the ejectable drive pulses to the nozzles; and a temperature measuring unit which measures the temperature of the ink. The drive signal generation unit also outputs non-ejectable drive pulses to the nozzle when the ink temperature is lower than a predetermined temperature. The non-ejectable drive pulses are generated and output in order that even when the nozzle is driven by the non-ejectable drive pulses, no ink droplet is ejected. It is therefore possible to provide, without substantially increasing the production cost, the printing apparatus which can elevate the ink temperature irrespective of the print coverage when the ink temperature is low.08-20-2009
20090244162Printhead Controller For Controlling Printhead On Basis Of Thermal Sensors - A printhead controller is provided for supplying dot data to a printhead module having a plurality of nozzles for expelling ink. The printhead module includes a plurality of thermal sensors. Each of the thermal sensors is configured to respond to a temperature at or adjacent at least one of the nozzles. The printhead controller is configured to modify operation of at least some of the nozzles in response to the temperature rising above a first threshold. The printhead module is a thermal inkjet printhead module and each of the nozzles includes a thermal ink ejection mechanism. Each thermal sensor comprises at least part of one of the thermal inkjet mechanisms.10-01-2009
20080211851INKJET RECORDING APPARATUS - An inkjet recording apparatus has a conveyor for conveying a recording medium in a conveying direction, at least one recording head having a flow path unit, a driver IC configured to output a drive signal, and an actuator configured to actuate ink in the flow path based on the drive signal, and a controller for controlling each of the conveyor and the at least one recording head. At least one recording head of the at least one recording heads has a temperature sensor for detecting a current temperature of the driver IC of the recording head. The controller has a detecting unit for comparing the current temperature with a particular predetermined temperature, a driving control unit for driving the driver IC based at least on the current temperature, and a cycle determining unit for determining an ejection cycle of at least one recording head.09-04-2008
20090295859SUBSTRATE FOR INKJET HEAD AND INKJET HEAD USING THE SAME - A substrate has M×N heater elements divided into N blocks and time divisionally driven in units of the block, and signal lines for supplying M bits of signals for selecting elements to be driven in each block. The signal lines are divided into two groups, each extending toward the center of a heater element array from a start point at either end side of the array in the array direction, and being used to select M/2 elements closest to the end side of the array. In each groups, the M/2 bit signal lines are arranged so that the number of the signal lines is decremented as the distance from the start point increases, and that the remaining signal lines are shifted toward the array. A temperature sensor for the substrate is provided in an empty area produced at a position corresponding to the center of the array by the shift.12-03-2009
20100201734INKJET PRINTER HAVING ARRAY TYPE HEAD AND METHOD OF DRIVING THE SAME - Provided is an inkjet printer having an array type head and a method of operating the inkjet printer. The inkjet printer can include a cartridge, a reservoir, a comparator and a pump. The cartridge can have an array type head with multiple inkjet printheads and a manifold to supply ink to the inkjet printheads. Each inkjet printhead can have a temperature sensor to measure temperature. The comparator can compare a signal produced by each of the temperature sensors to a signal associated with a reference temperature. The pump can circulate ink between the reservoir and the manifold of the cartridge based on the result of the temperature comparison.08-12-2010
20110199418IMAGE FORMING APPARATUS AND EJECTION LIQUID CIRCULATING METHOD - The image forming apparatus includes an upstream side chamber arranged further on an upstream side with respect to an ink flowing direction than a head in a circulating path and configured to temporarily store the ejection liquid that should be supplied to the head through the circulating path, a downstream side chamber arranged further on a downstream side than the head and further on the upstream side than the upstream side chamber in the circulating path and configured to temporarily store the ejection liquid collected from the head, and a pressure-difference adjusting mechanism configured to form a first pressure state in which the pressure in the downstream side chamber is lower than the pressure in the upstream side chamber and the head and a second pressure state in which the pressure in the upstream side chamber is lower than the pressure in the downstream side chamber.08-18-2011
20100103216MEMS FLUID SENSOR - A fluid sensor for detecting fluid in a chamber, has a MEMS sensing element of conductive material with a resistance that is a function of temperature, and electrical contacts for connection to an electrical power source for heating the sensing element with an electrical signal, so that control circuitry can measure the current passing through the sensing element during heating of the sensing element; and determine the temperature of the sensing element from the known applied voltage, the measured current and the known relationship between the current, resistance and temperature. As the temperature of the element will be greater if it is in the presence of gas rather than liquid, the sensor determines if there is liquid or gas in the chamber. This is particularly useful to detect if the chambers of an inkjet printhead are primed with ink.04-29-2010
20090002425INK JET PRINT HEAD AND METHOD OF DETECTING MISSING NOZZLE - An apparatus and method of detecting a missing nozzle in an ink jet print head can detect a missing nozzle with a simple process when the missing nozzle is generated. The method of detecting the missing nozzle used in the ink jet print head provided with plural chambers in which an ink is filled, plural heaters to heat the ink in the chambers, and plural nozzles corresponding to the heaters, includes detecting a temperature of each of the heaters, and when the detected temperature deviates from a predetermined temperature range, determining that the nozzle corresponding to the heater is the missing nozzle.01-01-2009
20080238979LIQUID DROPLET EJECTING APPARATUS - A liquid droplet ejecting apparatus is provided. The liquid droplet ejecting apparatus includes: a liquid storage container for storing a liquid therein; a carriage configured to reciprocate; an ejecting head mounted on the carriage and configured to eject liquid droplets; a liquid tank which is mounted on the carriage and is connected to the ejecting head and which is connected to the liquid storage container via a flexible tube; an air supply and discharge unit configured to supply air to the liquid tank and discharge air from the liquid tank; and a pressure controller controls the air supply and discharge unit so as to reduce a pressure fluctuation in the internal pressure of the liquid tank generated due to an inertial force applied to a liquid in the tube when the carriage changes a moving direction thereof.10-02-2008
20080284809Image recording apparatus and ink circulation control method - An image recording apparatus according to the invention includes a recording unit which jets ink from a nozzle array formed by plural nozzles communicated with each ink chamber, an ink tank in which the ink is stored, and an ink circulation unit which circulates the ink between the recording unit and the ink tank. In the image recording apparatus, control contents are determined in controlling the ink circulation unit based on analysis result of job information, notified by a host apparatus, for performing recording process of recording data, nozzle array temperature detection information on detected temperature in each ink chamber, and ink tank temperature detection information on detected temperature of the ink in the ink tank, and the ink circulation unit is controlled based on the determined control contents.11-20-2008
20080303853Micro-Fluid Ejection Head Having Adaptive Thermal Control - A method of controlling a micro fluid ejection device by sensing a middle zone temperature, and selectively applying an amount of power to a middle zone heater to achieve a target temperature. An edge zone temperature is also sensed and power is selectively applied to edge zone heaters to achieve a target temperature for the edge zones, whereby uniform ejection of fluid droplets along an ejector array may be achieved.12-11-2008
20080204500Ink jet printer - An ink jet printer is provided with an ink jet head, a sub ink tank, a carriage, a main body, an actuator, an ink quantity detection device, and a controller. The ink jet head has an ink passage and a nozzle communicated with the ink passage. The sub ink tank is communicated with the ink passage of the ink jet head. The sub ink tank is elastically deformable. The ink jet head and the sub ink tank are mounted on the carriage. The carriage is capable of moving. The main body houses the ink jet head, the sub ink tank, and the carriage. The main body has a space for housing a main ink tank that is to be communicated with the sub ink tank. The actuator is capable of performing a predetermined action such that the actuator applies a pushing force to the sub ink tank and releases the pushing force after applying the pushing force in a state where the main ink tank is communicated with the sub ink tank. The ink quantity detection device detects whether an ink quantity within the sub ink tank is less than a first value. The controller controls the actuator such that the actuator performs the predetermined action in a first case where the ink quantity within the sub ink tank is less than the first value. The controller controls the actuator such that the actuator performs the predetermined action in a second case where the ink quantity within the sub ink tank is more than the first value and a predetermined condition is satisfied.08-28-2008
20080278532INKJET PRINTHEAD WITH TEMPERATURE ZONES - A printhead IC is provided having an array of nozzles, drive circuitry for receiving print data and sending drive pulses of electrical energy to the array of nozzles in accordance with the print data, and a temperature sensor connected to the drive circuitry to adjust the drive pulse profile in response to the temperature sensor output. During use, the temperature sensor can be de-activated after a period of use. The drive circuitry is programmed with a series of temperature thresholds defining a set of temperature zones, each of the zones having a different pulse profile for the drive pulses sent to the nozzles in the region currently operating in that temperature zone.11-13-2008
20090015618INKJET IMAGE FORMING APPARATUS AND METHOD TO CONTROL THE SAME - An inkjet image forming apparatus includes a negative pressure controller in an ink supply flow path that connects an ink storage and a print head. The negative pressure controller includes a valve to open and close the flow path to control a negative pressure applied to the print head. If there is a need to cool the ink heated by a maintenance operation performed on the print head or to cool the ink heated by a print job, a controller in the apparatus controls the valve of the negative pressure controller to release the negative pressure applied to the print head so that the print head is filled with low-temperature ink from the ink storage.01-15-2009
20090160898METHOD AND APPARATUS FOR CONTROLLING NON-NUCLEATING HEATING IN A FLUID EJECTION DEVICE - A method is described for controlling the temperature of a fluid ejection head is a fluid ejection apparatus. The fluid ejection head includes heating elements for generating fluid-nucleating heat for fluid ejection purposes and for generating non-fluid-nucleating heat (NNH) for temperature control purposes. The fluid ejection head has heating elements disposed in a plurality of zones distributed across the fluid ejection head. The heating elements are assigned to a plurality of address groups that are activated during corresponding address windows. The method includes generating a bit intensity word corresponding to each zone, where the bit intensity word specifies a sequence for activating the address groups for generating NNH. Each bit of the bit intensity word controls the activation of a corresponding address group during a corresponding address window. The high or low states of each bit in each of the bit intensity words are determined so that the address groups activated during the address windows are evenly distributed over the zones of the fluid ejection head to substantially balance the distribution of electrical current applied for non-fluid-nucleating heating across the zones.06-25-2009
20110221819PRINTING APPARATUS, METHOD OF CORRECTING IN PRINTING APPARATUS, AND STORAGE MEDIUM STORING PROGRAM THEREOF - A printing apparatus includes a sensor for detecting temperature of a printhead and outputting the detected temperature as a voltage, and a controller for detecting the voltage, which has been output by the sensor, via a cable and controlling driving of the printhead. The apparatus comprises a switch settable to two states, one in which current is supplied to the sensor and one in which current is not supplied to the sensor; and a correction unit that subtracts a first voltage detected by the controller in a case where the state in which current is not supplied to the sensor has been set by the switch from a second voltage detected by the controller in a case where the state in which current is supplied to the sensor has been set by the switch, thereby obtaining a correction voltage corrected for a crosstalk component produced in the cable.09-15-2011
20090051723Liquid transporting apparatus - An ink transporting head includes a head main body in which, an ink channel is formed, a transporting electrode which is arranged on an inner surface of the ink channel, an insulating layer which is arranged on the inner surface of the ink channel to cover the transporting electrode, and which changes a wetting angle of liquid on a surface according to an electric potential of the transporting electrode, and a heat generator which heats the ink inside the ink channel. Accordingly, there is provided a liquid transporting apparatus which is capable of suppressing a temperature fluctuation of the liquid inside the liquid channel, and transporting the liquid stably.02-26-2009
20090051722IMAGE FORMING APPARATUS AND METHOD FOR CONTROLLING INK EJECTION - An image forming apparatus includes an inkjet head, a first tank and a second tank, a first flow path, a second flow path, a third flow path, and a negative pressure control mechanism that controls negative pressure in the first tank and the second tank. The negative pressure control mechanism alternately switches a first phase in which the ink is delivered from the first tank to the second tank, and a second phase in which the ink is delivered from the second tank to the first tank. The inkjet head ejects the ink both in the first phase and in the second phase.02-26-2009
20090231378METHOD FOR INCREASING PRINTHEAD RELIABILITY - A method of reducing intermittent weak or missing (IWM) jet failures in a phase change ink imaging device comprises fluidly connecting a positive pressure source to a print head assembly of a phase change ink imaging device. The print head assembly includes a plurality of ink jets for emitting ink drops onto an ink receiver. The method includes activating the pressure source to deliver a positive pressure pulse to the print head assembly. The pressure pulse is delivered at substantially a purge pressure. The pressure pulse has a pulse duration such that the pressure pulse bulges ink from the plurality of ink jets without emitting ink from the plurality of ink jets.09-17-2009
20110227986INK PRESSURE REGULATOR WITH LIQUID-RETAINING STRUCTURE - An ink pressure regulator for regulating a hydrostatic pressure of ink supplied to an inkjet printhead. The regulator includes an ink chamber having an ink outlet for fluid communication with the printhead via an ink line. A roof of the ink chamber includes: an air inlet; a regulator channel having a first end communicating with the air inlet and a second end communicating with a headspace of the chamber; and a liquid-retaining structure in fluid communication with the regulator channel. The liquid-retaining structure is positioned and configured for capturing ink from the headspace of the ink chamber. The regulator channel is dimensioned to regulate a hydrostatic pressure of the ink supplied to the printhead.09-22-2011
20090231379LIQUID EJECTING HEAD AND LIQUID EJECTING APPARATUS - There is provided a liquid ejecting head including a plurality of pressure generating chambers, a first substrate having a reservoir unit, and a second substrate having a compliance unit, the second substrate being combined with one surface of the first substrate via an adhesive layer. The reservoir unit has a first area and a second area whose width in a direction perpendicular to the arrangement direction of the pressure generating chambers is smaller than a width of the first area, the compliance unit is provided to seal the reservoir unit and the surrounding of the compliance unit is fixed by the adhesive layer, and a width of the compliance unit corresponding to the second area of the reservoir unit is formed so as to be larger than the width of the second area.09-17-2009
20090231380INKJET PRINTING APPARATUS AND METHOD OF PREDICTING - There are provided an inkjet printing apparatus and a method of predicting which can perform an accurate ink remaining amount detection. An inkjet printing apparatus is for performing printing onto a print medium by using a print head including an energy generating element generating energy used for ejecting ink from an ejection opening. The apparatus has a print head temperature detecting unit, an atmosphere temperature detecting unit and a predicting unit. The predicting unit drives the energy generating element at the time a difference between the temperature of the print head before driving the energy generating element and the atmosphere temperature detected by the atmosphere temperature detecting unit is less than a predetermined temperature.09-17-2009
20110221820METHOD OF CALIBRATING TEMPERATURE SENSOR, METHOD OF MANUFACTURING RECORDING HEAD, AND INKJET RECORDING APPARATUS - A method of calibrating a temperature sensor, provided in the recording head, for measuring a temperature of a liquid in a recording head of an inkjet type having nozzles from which the liquid is ejected, includes: an ambient temperature acquisition step of acquiring an ambient temperature where the recording head is located; a sensor output value acquisition step of acquiring an output value of the temperature sensor in a state where the liquid has been filled into the recording head; a calculation step of calculating a correction coefficient for correcting the output value according to the ambient temperature and the output value; and a storage step of storing the correction coefficient in a storage device of the recording head.09-15-2011
20090002426INKJET IMAGE FORMING APPARATUS AND CONTROL METHOD THEREOF - An inkjet image forming apparatus sets an initial ink temperature according to a dot area of a dot-sized pattern printed by the printer head, and calculates an ink temperature by applying the initial ink temperature to a temperature conversion equation. The inkjet image forming apparatus prevents a measurement error of the temperature sensor from valid data after the printing process is terminated, so that it can correctly measure the ink temperature of the printer head.01-01-2009
20090102879INKJET RECORDING APPARATUS AND RECORDING METHOD - An inkjet recording apparatus has: a recording head of an inkjet type having a liquid ejection surface where a plurality of nozzles which eject liquid are arranged, a supply port which supplies the liquid to an internal flow channel connected to the plurality of nozzles, and an outlet port which is connected to the supply port via the internal flow channel and through which the liquid in the internal flow channel is expelled; a first liquid chamber which is connected to the supply port of the recording head via a first external flow channel; a second liquid chamber which is connected to the outlet port of the recording head via a second external flow channel; a liquid buffer chamber which stores the liquid supplied from a liquid supply source; a first connecting flow channel which connects the first liquid chamber to the liquid buffer chamber; a second connecting flow channel which connects the second liquid chamber to the liquid buffer chamber; a first pressure determination device which determines an internal pressure of the first liquid chamber; a second pressure determination device which determines an internal pressure of the second liquid chamber; a liquid movement device which moves the liquid between the first liquid chamber, the second liquid chamber and the liquid buffer chamber; and a pressure control device which controls the liquid movement device in accordance with determination results of the first pressure determination device and the second pressure determination device in such a manner that interiors of the first liquid chamber and the second liquid chamber respectively assume prescribed pressures, wherein the pressure control device controls the liquid movement device so as to adjust the internal pressures of the first liquid chamber and the second liquid chamber in such a manner that a prescribed pressure differential between the internal pressures of the first liquid chamber and the second liquid chamber is produced and a prescribed back pressure is applied to the liquid inside the plurality of nozzles of the recording head.04-23-2009
20090213163Inkjet printer - In an inkjet printer where an ink recycling path for recycling ink is formed by connecting among an ink head, an upstream tank, and a downstream tank, the inkjet printer includes a temperature detecting unit that detects a temperature of recycling ink, a temperature changing unit that is installed in the ink recycled path and changes the temperature of the recycling ink so that the temperature of the recycling ink reaches a predetermined temperature, and an ink recycling amount changing unit that is installed at the upstream tank and changes an ink recycling amount according to the change in temperature of the recycling ink. Time required to make the temperature of the recycling ink reach the predetermined temperature can be shortened.08-27-2009
20090122097PRINTHEAD AND PRINTING APPARATUS - A printhead in which the voltage fluctuation absorption range of a MOS transistor serving as a constant current source is narrowed according to constant current driving. The printhead includes a controller which controls voltage fluctuations to adjust a current supplied to a plurality of printing elements. The printhead also includes a DC/DC converter which outputs a voltage of a voltage value to be applied to a plurality of printing elements from outside a printing element substrate.05-14-2009
20090251505FLUID EJECTING HEAD, A FLUID EJECTING APPARATUS - A recording head 10-08-2009
20090256879INKJET PRINTING APPARATUS AND INKJET PRINTING METHOD - There are provided an inkjet printing apparatus and an inkjet printing method, whereby, the temperature of a print head is controlled and the ejection volume of ink to be ejected is stabilized to print a high-quality image, even at a high printing duty. Based on print data, an ejection number of ink to be ejected into a unit printing area is counted. The print head is heated to a target temperature that is raised in consonance with an increase in the count value.10-15-2009
20090256880PRINTING SYSTEM, INKJET PRINTER AND METHOD FOR PRINTING - A printing system includes an inkjet head, a medium supporting portion and a decompressor. The inkjet head has nozzles configured to eject ink to a print surface of a medium. The nozzles have a nozzle surface on which openings of the nozzles exist. The medium supporting portion has a supporting surface configured to support the medium at a back surface of the medium opposite to the print surface. The print surface faces the nozzles of the inkjet head. A distance between the nozzle face and the supporting surface of the medium supporting portion is about 5 mm or more. The decompressor is configured to reduce a pressure in an area between the medium and the nozzles to be a pressure value lower than atmospheric pressure.10-15-2009
20090273629RECORDING ELEMENT SUBSTRATE, RECORDING HEAD, AND INK JET RECORDING APPARATUS HAVING THE RECORDING HEAD - Measurement accuracy in temperature of a substrate for an ink jet head is improved. A substrate for an ink jet head includes diode sensors and aluminum sensors and as plural kinds of substrate temperature sensing elements, each of which has an output voltage property different from each other. The diode sensors and have a property that the output voltage thereof decreases as temperature increases when a constant current is applied to the corresponding sensor. The aluminum sensors and have a property that the output voltage thereof increases as temperature increases when the constant current is applied to the corresponding sensor.11-05-2009
20110109683Temperature Leveling Roller and Pressure Nip Assembly - An imaging device includes a substantially continuous web of media, and a web transport system configured to transport the continuous web along a web path. A print station is positioned along the web path and is configured to apply ink to the continuous web. A temperature leveling ink spreader is disposed along the web path downstream from the print station. The temperature leveling ink spreader includes a leveler roller including a heater configured to generate thermal energy to heat the leveler roller to a spreading temperature. The leveler roller is positioned to be partially wrapped by the continuous web to generate a predetermined dwell time between the continuous web and the leveler roller as the continuous web is being transported to equalize the temperatures of the web and ink on the web to within a predetermined range about the spreading temperature. The temperature leveling ink spreader includes a pressure roller positioned adjacent the leveler roller to form a spreading nip therebetween through which the continuous web is fed after the predetermined dwell time. The spreading nip is configured to apply a predetermined pressure to the continuous web and the ink thereon.05-12-2011
20100188457METHOD AND APPARATUS FOR CONTROLLING THE TEMPERATURE OF AN ELECTRICALLY-HEATED DISCHARGE NOZZLE - In an embodiment, the disclosure relates to a method and apparatus for fault monitoring and controlling operation of a discharge nozzle in a large array of discharge nozzles. An exemplary apparatus includes a thin, thermally conductive membrane, with an integrated thin-film electrical heater. When a fixed voltage is applied to the heater, and as the heater heats, the resistance of the heater will increase which will cause a concomitant decrease in the electrical current flowing through the heater. By measuring the resistance of the heater it can readily be determined whether the device is functioning properly.07-29-2010
20100188456System And Method For Protecting A Printer From An Over-Temperature Condition In A Printhead - A method responds to an over-temperature condition in a printhead. The method includes generating a first electrical signal corresponding to a temperature in a printhead, monitoring the first electrical signal with a first electronic circuit to terminate delivery of electrical power to a printhead in response to detection of a safety event, and monitoring the first electrical signal with a second electronic circuit to regulate an amount of electrical power delivered to the printhead.07-29-2010
20100002038INKJET PRINTER, PRINTING METHOD AND INK DRYER - An inkjet printer includes an inkjet head, a wave guide, an electromagnetic-wave supplier, and a detector. The inkjet head is configured to eject an ink onto a surface of a recording medium. The recording medium onto which the ink has been ejected is to pass through the wave guide. The electromagnetic-wave supplier is configured to supply electromagnetic waves into the wave guide. The detector is configured to detect a parameter relating to a dryness of the recording medium which has passed through the wave guide. The controller is configured to control the electromagnetic-wave supplier to control an intensity of the electromagnetic waves according to the parameter relating to the dryness of the recording medium.01-07-2010
20100013886CONSTANT FLOW HIGH PRESSURE PRINTING SYSTEM - A high pressure printing system comprising: a high pressure printing head, constructed and arranged for printing a printing fluid with a printing pressure in at least a part of a channel upstream of the printing head in an interval of 15-3000 bars; a pressure system comprising a printing fluid inlet and a plurality of pressure cylinders constructed and arranged for providing a constant flow of said printing fluid, the pressure cylinders being interconnected by at least a pressure valve; and a damper, connected between an outlet of the pressure system and said high pressure printing head, provided for damping the valve action of the pressure valve.01-21-2010
20100225696DROPLET EJECTING DEVICE - A droplet ejecting device includes a recording head, a temperature detector, and moving section. The recording head is elongated, a liquid is filled therein, and plural nozzles, that eject droplets on the basis of image information, are arrayed along a predetermined direction. The temperature detector detects a temperature of a predetermined range of a nozzle surface at which the plural nozzles of the recording head are arrayed. The moving section moves at least one of the temperature detector and the recording head relatively in the predetermined direction.09-09-2010
20100225697IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - An image forming apparatus includes: a printing device which forms an image on a recording medium using ink containing at least pigment, a water-soluble organic solvent, resin particles and water; and a fixing device which makes contact with a surface of the recording medium on which the image is formed and applies heat and pressure to fix the image, wherein a minimum filming temperature (MFT09-09-2010
20100238226PRINTING APPARATUS AND PRINTING CONTROL METHOD - The present invention uses a temperature sensor to sense the temperature of a print head configured to eject ink, and senses the environmental temperature of a printing apparatus. The temperature of the print head is corrected based on the environmental temperature only if information from the temperature sensor is different from the last information acquired.09-23-2010
20120139989INK JET RECORDING APPARATUS - An ink jet recording apparatus includes a storage part to store a recording medium, an image forming part that forms an image by ejecting an aqueous ink to the recording medium conveyed from the storage part, a separation part that includes a slit to allow the recording medium to pass from the storage part to the image forming part, and an opening and closing part to open and close the slit, and separates the storage part and the image forming part, a detection part to detect conveyance of the recording medium from the storage part to the image forming part, and a control part to control opening and closing of the opening and closing part in accordance with a detection result of the detection part.06-07-2012
20090040257INKJET PRINTHEADS WITH WARMING CIRCUITS - A thermal inkjet apparatus includes a printhead body, nozzles, ink cavities and ink supply lines. Heater resistors are in the cavities and a firing circuit is connected to provide firing pulses to the heater resistor and nucleate the ink so that it fires ink out of the nozzles. Each heater resistor is also connected to a warming circuit that supplies warming pulses, one warming pulse during each firing cycle, to warm the heater resistors but not nucleate the ink. The warming circuit includes current limiting ballast resistors to limit the current through the healer resistors and thereby prevent the warming pulse from nucleating the ink. Warming pulses and firing pulses are not generated during the same firing cycle for a particular heater resistor. One or more thermal sensors are disposed on the printhead body to sense the temperature and a control circuit responds to the sensors to generate warming pulses having desired widths to provide a desired level of warming. By wide range pulse width modulation of the warming pulse, the warming effect of the warming pulse may be increased or decreased as desired. Also the warming pulse may be completely eliminated, such as by pulse width modulating the pulse to have a zero duration.02-12-2009
20130127944INDIRECT TEMPERATURE MONITORING FOR THERMAL CONTROL OF A MOTOR IN A PRINTER - In one embodiment, a method of operating a permanent magnet direct current (PMDC) motor in a printer has been developed. The method includes identifying that a temperature of the PMDC motor exceeds an operating temperature of the motor without the use of a direct temperature sensor. The PMDC motor operates at a reduced printing rate to prevent the motor from overheating.05-23-2013
20090322822DROP VOLUME COMPENSATION FOR INK SUPPLY VARIATION - The present invention relates to a method that enables image quality of a printed image to be maintained by reducing unintended variations in drop volume, through the adjustment of ink drop ejecting conditions depending on the amount of ink remaining in an ink tank chamber or reservoir, and/or the ink demand for printing an image. The method of printing of the present invention comprises: providing a printhead in fluid communication with an ink chamber or reservoir; detecting at least one parameter related to an amount of negative pressure provided to the printhead; and adjusting an ink drop ejecting condition of the printhead as a function of the parameter so that an amount of variation in size of ejected ink drop is reduced.12-31-2009
20090073212APPARATUS AND METHOD OF CONTROLLING TEMPERATURES IN EJECTION MECHANISMS - An apparatus and method for controlling temperature profiles in ejection mechanisms is provided. A heater includes a first resistor segment having an electrical resistivity, a second resistor segment; and a coupling segment positioned between the first resistor segment and the second resistor segment. The coupling segment has an electrical resistivity, wherein the ratio of the resistivity of the coupling segment to the resistivity of the first resistor segment is substantially zero. Alternatively, the first resistor segment has an electrical conductivity and the coupling segment has an electrical conductivity, wherein the electrical conductivity of the coupling segment is greater than the electrical conductivity of the first resistor segment.03-19-2009
20120242739LIQUID EJECTING HEAD AND LIQUID EJECTING APPARATUS - A liquid ejecting head includes a flow channel forming substrate made of silicon and having pressure generating chambers that communicate with nozzles through which liquid is ejected, a piezoelectric elements that is disposed on the flow channel forming substrate so as to oppose the pressure generating chambers and varies a pressure of a liquid in the pressure generating chambers, and a protective substrate which has a holding section that houses the pressure generating unit and is bonded to a side of the flow channel forming substrate where the pressure generating unit is disposed, and the flow channel member is made of silicon and is provided with a thermistor that is disposed on a side of the flow channel member opposite to the flow channel forming substrate.09-27-2012
20100295887PRINTER ASSEMBLY WITH CONTROLLER FOR MAINTAINING PRINTHEAD AT EQUILIBRIUM TEMPERATURE - A printer assembly includes a media housing unit having a number of ink reservoirs internally defined by a core portion around which print media is rolled; an ink supply and a printhead unit attached to the media housing unit; an ink manifold provided between the ink supply and the printhead, the ink manifold having an aperture to which the printhead is attached; a drive unit having a platen for extracting the print media from the media housing unit and feeding the print media past the printhead unit, the drive unit defining ink transmission channels interposed between the ink reservoirs and the ink supply; and a controller for controlling operation of the printhead and drive units, the controller configured to maintain the printhead at an equilibrium temperature during printing.11-25-2010
20100231634Ejection Surface Cleaning Apparatus, Liquid Ejection Apparatus and Ejection Surface Cleaning Method - An ejection surface cleaning apparatus for cleaning a liquid ejection surface of a liquid ejection head ejecting an ejection liquid, includes: a cleaning liquid deposition device which deposits a cleaning liquid that dissolves or redisperses the ejection liquid, onto the liquid ejection surface; a wiping device which wipes the liquid ejection surface onto which the cleaning liquid has been deposited; and a control device which controls a leave time from deposition of the cleaning liquid onto the liquid ejection surface until wiping performed by the wiping device.09-16-2010
20110242185LIQUID EJECTING HEAD, LIQUID EJECTING HEAD UNIT AND LIQUID EJECTING APPARATUS - A liquid ejecting head includes a pressure generation chamber which fluidly communicates with a nozzle opening through which liquid is discharged, a pressure generation unit which causes pressure change on liquid in the pressure generation chamber, a manifold which serves as a liquid chamber common to a plurality of the pressure generation chambers, a flexible film which is configured to cover the manifold so as to absorb a pressure change generated in the manifold, and a heat generation unit which is formed on the flexible film at a region opposed to the manifold and is made of a pattered metal.10-06-2011
20110109684INK JET PRINTING - A continuous ink jet printer comprises a gutter for collecting ink droplets not used in printing. Pumping apparatus draws ink from the gutter and control apparatus is configured to vary the level of pumping by the pumping apparatus depending on the temperature or other parameter of the ink. As the temperature of the ink increases the level of pumping is reduced. The pumping apparatus may comprise two venturi pumps connected in parallel each having its throat connected to the gutter.05-12-2011
20110025751INKJET PRINTER WITH INK TEMPERATURE ADJUSTMENT MECHANISM - An inkjet printer includes a head section, an ink heating section, and an ink cooling section. The head section includes an ink head which discharges ink. The ink heating section heats the ink supplied to the head section. The ink cooling section cools the ink supplied to the head section. The ink flows through the ink cooling section, the ink heating section and the head section in the order mentioned.02-03-2011
20110043564Inkjet head and method of manufacturing the same - An inkjet head according to an aspect of the invention may include: a flow path plate having a plurality of ink chambers; a nozzle plate having a plurality of nozzles connected to the ink chambers in order to eject ink in the ink chambers to the outside; and a temperature control unit having a heat exchange passage in at least one of the flow path plate and the nozzle plate in order to control temperature of the ink.02-24-2011
20090219323PRINTER WITH INK SUPPLY SYSTEM HAVING DOWNSTREAM CONDUIT LOOP - A printer comprising: 09-03-2009
20090219326PRESSURE-REGULATING CHAMBER COMPRISING FLOAT VALVE BIASED TOWARDS CLOSURE BY INLET INK PRESSURE - A pressure-regulating chamber for maintaining ink contained in the chamber at a predetermined first level relative to a printhead. The chamber comprises: an inlet port for connection to an ink reservoir via an ink supply line; an outlet port for connection to an ink inlet of a printhead via an upstream ink line; an air vent open to atmosphere; and a float valve for maintaining the predetermined first level of ink by controlling a flow of ink into the inlet port. The float valve is biased towards a closed position by a positive ink pressure at the inlet port.09-03-2009
20090219324PRINTER HAVING RECYCLING INK AND PRESSURE-EQUALIZED UPSTREAM AND DOWNSTREAM INK LINES - A printer comprising a printhead and a pressure-regulating chamber containing ink at a predetermined first level relative to the printhead. The chamber comprises an outlet port, a return port positioned in a base of the chamber, a snorkel extending from the return port and terminating at a snorkel outlet positioned above the first level of ink, and an air vent open to atmosphere. An upstream ink line interconnects the outlet port and an ink inlet of the printhead. A downstream ink line interconnects the return port and an ink outlet of the printhead. The downstream ink line has a section looping below the first level of ink. In a printing configuration, a second level of ink in the snorkel is equal to the first level of ink in the chamber.09-03-2009
20110085003INK JET PRINTING APPARATUS AND PRINT HEAD TEMPERATURE CONTROL METHOD - When the head temperature Tfinish, which is the head temperature at the time of completion of a preceding scan, is higher than the stable ejection temperature Tstable, the target temperature is made a temperature that is only a temperature value ΔT lower than the head temperature Tfinish. On the other hand, when Tfinish, the head temperature at the time of print completion, is lower than the stable ejection temperature Tstable, the target temperature is made a temperature that is only a temperature value ΔT higher than the head temperature Tfinish. Because of this it is possible to inhibit head temperature rise in the case where an image with a high print density is printed.04-14-2011
20110085004INKJET PRINTING APPARATUS - An inkjet printing apparatus includes: an array of inkjet heads; a set of heating elements each in a corresponding one of the inkjet heads and each configured to heat ink; an ink circulation route configured to circulate ink through the inkjet heads; an inlet thermometer configured to measure, as first temperatures, ink temperatures of ink each flowing into a corresponding one of the inkjet heads; an outlet thermometer configured to measure, as second temperatures, ink temperatures of ink each flowing out of a corresponding one of the inkjet heads; a heating unit configured to heat ink being circulated; and a controller configured to work with a temperature difference between a first temperature and a second temperature for each same inkjet head to determine allocation of an available power for heating ink to the heating elements and the heating unit.04-14-2011
20090244161INK JET PRINTING APPARATUS AND PRINT HEAD RECOVERY METHOD - An ink jet printing apparatus and a print head recovery method are provided which effectively execute a preliminary ejection to eject ink not contributing to image printing from nozzle opening of the print head to maintain the ink ejection performance in good condition. The ink in the print head is heated to a first temperature, at which a first preliminary ejection is executed. Then, when the ink temperature falls to a second temperature, which is lower than the first temperature, a second preliminary ejection is executed.10-01-2009
20100053253Liquid jet recording apparatus and liquid jet recording method - We provide a liquid jet recording apparatus includes: a liquid container; a jetting portion for jetting the liquid disposed lower than the surface of the liquid contained in the liquid container; a conduit for communicating the jetting portion with the liquid container disposed between the jetting portion and the liquid container; an on-off valve for open or close the conduit being disposed in the conduit; a liquid storing portion for damping pressure fluctuations of the liquid which flows in the conduit disposed in the conduit between the on-off valve and the jetting portion; a pressure sensor for measuring the pressure of the liquid in the conduit disposed in the conduit between the liquid storing portion and the jetting portion; and a control portion for controlling the on-off valve to be opened or closed based on a pressure value measured by the pressure sensor.03-04-2010
20100134554PRINTHEAD INTEGRATED CIRCUIT HAVING SENSING AND TEST CIRCUITRY - A printhead IC is provided having ejection nozzles, drive circuitry for sending drive pulses to resistive heaters of the nozzles to cause ejection from the nozzles, sensing circuitry being activated to sense the temperature of the printhead IC and adjust the profile of the sent drive pulses in accordance with the sensed temperature and being de-activated after a period of use, and test circuitry for selectively disabling the resistive heaters when they receive the drive pulses while comparing the resistance of the resistive heaters against a predetermined threshold to assess whether the resistive heaters are defective.06-03-2010
20110249053Liquid Ejecting Apparatus and Control Method of Liquid Ejecting Apparatus - Liquid ejecting apparatus and control methods thereof are disclosed. A liquid ejecting apparatus includes an ejecting head having liquid-ejecting nozzles, a platen disposed to support a recording medium and face the ejecting head, a heater that heats the platen, a temperature sensor to detect a temperature of the ejecting head, and a control section that causes liquid to be ejected from the nozzles. If a change in a temperature of the ejecting head and/or a temperature of the ejecting head exceeds a predetermined range, the control section stops ejection of liquid for printing from the nozzles in the absence of a user input to continue printing. After the control section stops the ejection of liquid, a response process can be carried out.10-13-2011
20110069104IMAGE RECORDING APPARATUS - An image recording apparatus includes: an image recording drum that suctions and holds a paper on an outer circumferential surface thereof in state of an image recording surface of the paper facing outward, and rotates at a constant speed so as to convey the paper; an image recording drum temperature adjustment device which adjusts temperature of the image recording drum; a cooling device which spouts out cooling air from a constant position towards the outer circumferential surface of the image recording drum in such a manner that the cooling air is blown onto the image recording surface of the paper conveyed by the image recording drum so as to cool the paper; and an image recording device which deposits ink onto the image recording surface of the paper conveyed by the image recording drum to record an image on the image recording surface, the image recording device being situated in a stage after the cooling device and depositing the ink onto the paper having been cooled to record the image.03-24-2011
20100302300WHITE INKJET INK IMPROVED FOR DISPERSION STABILITY - An inkjet printing method includes the steps of 12-02-2010
20100053252LIQUID DISCHARGING APPARATUS AND METHOD OF CONTROLLING LIQUID DISCHARGING APPARATUS - A liquid discharging apparatus includes a liquid discharging head having a nozzle opening, a pressure generating chamber communicating with the nozzle opening and a pressure generator that generates a change in the pressure of a liquid inside the pressure generating chamber, the liquid discharging head being capable of discharging the liquid from the nozzle opening by operation of the pressure generator; and a driving signal generator that is capable of repeatedly generating in constant periods a first driving signal and a second driving signal that each include a discharge pulse for discharging the liquid by driving the pressure generator; wherein, when the Helmholtz natural oscillation period inside the pressure generating chamber is denoted by Tc and n is taken to be a natural number, a time Δt from a beginning of a first discharge pulse included in the first driving signal to a beginning of a second discharge pulse included in the second driving signal satisfies (n−½)Tc<Δt03-04-2010
20080246795LIQUID EJECTING APPARATUS, LIQUID EJECTING METHOD, AND PROGRAM - A liquid ejecting apparatus includes a head group having a plurality of heads provided with supply ports for supplying liquid to the heads, the heads being arranged in a nozzle-array direction and ejecting the liquid therefrom to form an image; and a heating portion that heats the liquid to be supplied to the head group, the heating portion being disposed between the supply ports of the heads located at opposite ends in the nozzle-array direction.10-09-2008
20100321439RECORDING HEAD AND RECORDING APPARATUS USING THE RECORDING HEAD - The present invention provides a recording head that has a driving circuit performing driving by dividing a plurality of heaters into a plurality of blocks and supplying electric current on a block-by-block basis based on recording data; a constant current source applying a common bias current to each temperature sensor group obtained by dividing temperature sensors disposed in correspondence to each heater of a plurality of heaters into blocks; a voltage output circuit having a switching element that turns electric current supply to the temperature sensors of the selected temperature sensor group ON and OFF, and obtaining a voltage generated at both terminals of the selected temperature sensor by supplying an electric current to the temperature sensor; and an amplifier circuit amplifying the detection voltages.12-23-2010
20100321438IMAGE FORMER - An ink discharge unit includes a plurality of nozzles and corresponding ink propelling mechanisms for the nozzles, and configured to discharge ink through the nozzles in accordance with drive signals to drive the ink propelling mechanisms, an ink temperature sensor is adapted to measure a temperature of ink at the ink discharge unit, and a negative-pressure controller is configured to control negative pressures acting on menisci formed in vicinities of the nozzles by surface tension of ink at the ink discharge unit, wherein the negative-pressure controller is configured to work with a discharge of ink by the ink discharge unit, operating for a measured temperature of ink by the ink temperature sensor equal to or higher than a first reference, to control the negative pressures to a first value, and for a measured temperature of ink by the ink temperature sensor lower than the first reference, to control the negative pressures to a second value which is lower than the first value.12-23-2010
20110164085LIQUID DISCHARGE HEAD AND LIQUID DISCHARGE APPARATUS USING LIQUID DISCHARGE HEAD - In order to provide a compact and highly reliable recording head enabling precise detection of temperature information on each nozzle and rapid as well as highly accurate detection on nozzles with a discharge defect, a liquid discharge head including a liquid discharge head with a plurality of electrothermal transducing members provided on a substrate to generate heat energy for discharging liquid from a discharge port includes a temperature detecting element formed immediately under each of the plurality of electrothermal transducing members to sandwich insulating film and a temperature detecting circuit for detecting temperature information from each of the temperature detecting elements.07-07-2011
20110134180SYSTEM AND METHOD FOR CONTROLLING A TEMPERATURE OF A PRINTHEAD BY CONFIGURING ITS I/O PAD TO MULTI-TASK - A system and method for controlling a temperature of a printhead by configuring its I/O pad to multitask. In one embodiment of the invention, a system includes an I/O pad affixed to the printhead to supply a signal to a circuit disposed on the printhead, a controller to interrupt the supply of the signal to the circuit when the temperature of the printhead exceeds a predetermined value, a drive mechanism to drive the I/O pad to a ground level when the temperature of the printhead falls back below the predetermined value, and a polling circuit to measure an electric level of the I/O pad such that the controller reestablishes the supply of the signal to the circuit when a ground level is measured by the polling circuit thereby providing an efficient way to constantly monitor and control the temperature of the printhead.06-09-2011
20120147080INKJET PRINTER - Disclosed is an inkjet printer. The inkjet printer comprises a carriage that has a print head that discharges ink; a carriage-moving mechanism that moves the carriage relatively along the surface to be printed of the printing medium that is supported by a platen; a print heater that heats the platen to adjust the heat of the printing medium; a non-contact temperature sensor that is attached to the carriage opposite the surface to be printed and that, along with the relative motion due to the carriage, detects the surface temperature of the printing medium along the direction of the abovementioned relative motion; and a temperature control unit of a control unit and an SSR that perform adjustment control of the surface temperature of the printing medium to a predetermined set temperature by means of driving the print heater on the basis of the detected temperature from the non-contact temperature sensor.06-14-2012
20100079533ON-CHIP HEATER AND THERMISTORS FOR INKJET - A chip used for dispensing a fluid such as ink provides ink-dispensing ejectors having an ink cavity over a supporting substrate, and further provides a heater for heating the ink in the cavity. The heater can be interposed between the substrate and the ink cavity to provide direct heating of ink as it is being dispensed Various embodiments further comprise the use of the heater structure as a temperature probe to measure the temperature of the ink in the ink cavity. Other embodiments provides a chip having both a temperature probe and a heater as separate structures interposed between the ink cavity and the substrate. Further described is a temperature probe and/or heater which traverses a majority of a width of a substrate, and surrounds each drop ejector on at least two sides.04-01-2010
20120038700ON-CHIP HEATER AND THERMISTORS FOR INKJET - A chip used for dispensing a fluid such as ink provides ink-dispensing ejectors having an ink cavity over a supporting substrate, and further provides a heater for heating the ink in the cavity. The heater can be interposed between the substrate and the ink cavity to provide direct heating of ink as it is being dispensed. Various embodiments further comprise the use of the heater structure as a temperature probe to measure the temperature of the ink in the ink cavity. Other embodiments provides a chip having both a temperature probe and a heater as separate structures interposed between the ink cavity and the substrate. Further described is a temperature probe and/or heater which traverses a majority of a width of a substrate, and surrounds each drop ejector on at least two sides.02-16-2012
20120007908PRINTING APPARATUS - A printing apparatus includes a printhead incorporating a temperature sensor, a control unit which controls the printhead, and a flexible cable which connects the printhead and the control unit. The flexible cable includes a first signal line and second signal line which generate voltages corresponding to the temperature of the printhead, and are connected to the temperature sensor. A differential amplifier circuit which is incorporated in the control unit amplifies the voltage difference between the first signal line and the second signal line to output the amplified voltage difference as temperature information of the printhead. A matching circuit makes the wiring resistances of the first signal line and second signal line match each other by grounding either the first signal line or the second signal line via a resistor in the printhead.01-12-2012
20120013673INK JET RECORDING APPARATUS, AND METHOD FOR CONTROLLING RECORDING HEAD TEMPERATURE - An ink jet recording apparatus for effecting recording using a recording head for ejecting ink, the ink jet recording apparatus including a heating section for heating the recording head, a detecting unit for detecting a temperature of the recording head, a setting unit for setting a target temperature of the recording head, and a controller for controlling the target temperature of the recording head at or above the target temperature. The controller controls the temperature by heating control for heating the recording head and by diffusing control for diffusing the heat supplied by the heating control.01-19-2012
20120154473InkJet Printer with Controlled Oxygen Levels - An in-line printing apparatus with an inerting station that delivers an atmosphere having an optimal composition to inert a layer of ink such that LED radiation adequately cures the ink. A process for configuring a printing environment for delivering an atmosphere having an optimal composition to inert a layer of ink such that LED radiation adequately cures the ink.06-21-2012
20120062639INKJET RECORDING DEVICE AND INKJET RECORDING METHOD - According to an embodiment, an inkjet device includes a first temperature sensor which detects an ink temperature in an upstream side of a print head, a second temperature sensor which detects an ink temperature in a downstream side of the print head, and a control device which changes at least one of energies per unit volume of first and second pressure sources, based on the temperatures detected by the first and second temperature sensors.03-15-2012
20120154475PRINTING APPARATUS AND TEMPERATURE DETECTION METHOD - This invention relates to precisely obtaining a head temperature free from influence of a signal transferred to a printhead, without slowing down the printing speed. In a printing apparatus which includes a printhead including a plurality of printing elements and a temperature sensor, and divides the plurality of printing elements into a plurality of blocks to print while performing division driving of the plurality of printing elements for each block, the head temperature is detected as follows. First, one printing period determined by a printhead driving frequency is divided into an active period required for the division driving and an inactive period required for A/D-converting an analog temperature data signal from the temperature sensor. While a signal required to drive the printhead is transferred in the active period, a digital signal A/D-converted from the temperature data signal from the printhead is read in the inactive period.06-21-2012
20120154476SUCTION-BASED RECOVERY CONTROL METHOD AND INK JET PRINTING APPARATUS - The amount of ink wastage is reduced, even in a case wherein a predetermined amount of air bubbles has grown in a print head at a specific internal temperature and the growth has been settled, and thereafter the temperature in the print head is increased. A suction-based recovery control method, for an ink jet printing apparatus that includes a print head, a temperature detection unit, and a suction-based recovery unit, comprising: a temperature detection step; a temperature judgment step for judging whether the internal temperature of the print head is higher than a reference temperature that is determined based on internal temperatures of the print head that were previously employed; and a suction-based recovery step for permitting the suction-based recovery unit when it is determined at the temperature judgment step that the internal temperature of the print head is higher by the predetermined number of degrees or greater.06-21-2012
20120154474LIQUID EJECTION APPARATUS AND STORAGE MEDIUM STORING PROGRAM - A liquid ejection apparatus including: a liquid-ejection head having ejection openings to eject liquid to record an image on a recording medium; a sealing mechanism configured to selectively establish a sealed state and an unsealed state; a humid-air supply mechanism which supplies a humid air into the ejection space; and a controller, wherein, during the sealed state of the ejection space, the controller controls the humid-air supply mechanism to supply the humid air into the ejection space such that one of a density and a viscosity of the liquid to be ejected from the ejection openings becomes less than a predetermined appropriate value, and then controls the liquid-ejection head such that the liquid having an amount equal to or larger than a set amount is preliminarily ejected prior to the ejection of the liquid onto the recording medium for recording the image on the recording medium, is disclosed.06-21-2012
20120249654TEMPERATURE DETECTING APPARATUS - A temperature detecting apparatus includes: a temperature sensor having an element whose resistance value changes depending on temperature and detecting temperature based on a voltage value obtained by supply of a supply current to the element from a power source and outputting an output voltage depending on the voltage value; a change-instructing-signal output portion connected to the temperature sensor and outputting a change instructing signal for changing the supply current based on the output voltage outputted from the temperature sensor; and a current-value change portion disposed between the power source and the element, connected to the change-instructing-signal output portion, and changing a current value of the supply current to be supplied to the element when having received the change instructing signal.10-04-2012
20100245453PRINTING DEVICE FLUID RESERVOIR - A fluid reservoir for use in a printing device includes a housing that, at least partially, forms at least one chamber therein. The chamber is configured to hold a fluid. A bubble port leads through housing into a first region of chamber and fluidically couples chamber to atmospheric gas external to housing. A bubble director arranged within chamber is configured to direct at least one bubble of gas from first region to a second region of chamber. The bubble is formed within fluid within first region upon gas entering chamber through bubble port.09-30-2010
20100245452Method And Apparatus For Melt Cessation To Limit Ink Flow And Ink Stick Deformation - A system controls application of heat with a melt plate to an ink stick in a solid ink imaging device. The system includes a melt plate, a heater configured to heat the melt plate to a temperature sufficient to melt solid ink, a feed channel configured to direct solid ink sticks towards the melt plate to enable a leading edge of a solid ink stick to be melted by the heated melt plate, and a controller configured to separate the heater and the leading edge of the ink stick by a distance that arrest melting of the ink stick.09-30-2010
20120162303RECORDING APPARATUS - A recording apparatus includes: a recording head that ejects liquid onto a recording medium; a transporting device that transports the recording medium along a supporting surface; and a preheating device that preheats the recording medium to the upstream side of the recording head in a transporting direction of the recording medium, in which the preheating device includes a preheating unit that increases the amount of heat per unit time which is applied to the recording medium, as the recording medium is moved toward the downstream side in the transporting direction.06-28-2012
20120133699System And Method For Protecting A Printer From An Over-Temperature Condition In A Printhead - A method responds to an over-temperature condition in a printhead. The method includes generating a first electrical signal corresponding to a temperature in a printhead, monitoring the first electrical signal with a first electronic circuit to terminate delivery of electrical power to a printhead in response to detection of a safety event, and monitoring the first electrical signal with a second electronic circuit to regulate an amount of electrical power delivered to the printhead.05-31-2012
20120313994PRINTER AND PRINT SYSTEM - According to one embodiment, a printer includes an image forming unit, a coloring conversion unit, and a deterring unit. The image forming unit forms an image from a temperature-sensitive ink whose color is changed depending on a temperature on a medium. The coloring conversion unit converts a coloring state of the image of the temperature-sensitive ink by heating or cooling the image of the temperature-sensitive ink. The deterring unit provided between the coloring conversion unit and the image forming unit deters an air heated or cooled by the coloring conversion unit from flowing toward the image forming unit.12-13-2012
20090058916IMAGE FORMING METHOD AND IMAGE FORMING APPARATUS - Provided is an image forming method which prevents the temperatures of printing heads from exceeding a predetermined temperature. In this image forming method, its basic assignment is changed when any one of the temperatures detected by the respective temperature sensors exceeds the predetermined temperature (for example, 60° C.). Specifically, each time the forming of an image on a printing medium (for example, a label) is completed, the temperatures of the respective printing heads are detected with the respective temperature sensors. When any one of the temperatures thus detected exceeds 60° C., the association of raster line regions with ink ejection opening arrays (the association of rasters with the printing heads) under the basic assignment is shifted one-by-one.03-05-2009
20090058915SUCTION DEVICE AND LIQUID DROPLET EJECTION APPARATUS HAVING THE SAME, AS WELL AS ELECTRO-OPTICAL APPARATUS AND MANUFACTURING METHOD THEREOF - Provided herein is a suction device that is provided in an inkjet liquid droplet ejection apparatus and sucks functional liquid while contacting with nozzle surfaces of the functional liquid droplet ejection heads. The suction device has a plurality of head caps, a suction channel having a plurality of individual channels, a plurality of channel opening/closing unit that is disposed on the individual channels and opens and closes the respective individual channels, a waste liquid tank, an ejector, a pressure adjustment unit that adjusts pressure of the compressed air at the primary side of the ejector, and a control unit that controls the pressure adjustment unit. The control unit controls the pressure adjustment unit according to the number of open-channel opening/closing units opened out of the plurality of channel opening/closing units such that a suction pressure is constant in the plurality of head caps.03-05-2009
20090058913INK JET IMAGE FORMING APPARATUS AND METHOD OF CONTROLLING THE SAME - Temperature characteristic information of each line of a print image is established in a database, an initial value of a temperature sensor is corrected such that a difference between a temperature measured by the temperature sensor provided in a print head and a temperature estimated on the basis of the temperature characteristic information established in the database is in an allowable range, and a printing operation is performed according to the temperature measured by the corrected temperature sensor. Accordingly, it is possible to prevent printing quality from deteriorating due to a measurement error of the temperature sensor.03-05-2009
20090058914INKJET PRINT HEAD AND METHOD THEREOF - An inkjet print head to accurately determine whether a relevant nozzle is a normal nozzle or a missing nozzle according to an ink temperature sensed by a temperature sensor, and consequently, to enable the supply of high-quality inkjet print head products and improve printing quality and reliability thereof. The inkjet print head includes an ink feed hole through which ink is introduced, a plurality of ink chambers each having a nozzle, through which the ink is ejected, a plurality of individual flow paths to connect the plurality of ink chambers with the ink feed hole, and a temperature sensor provided in each of the plurality of individual flow paths and used to sense an ink temperature in an associated individual flow path when an ink bubble generated in an associated one of the plurality of ink chambers moves backward to the ink feed hole.03-05-2009
20120176439INKJET PRINTER - An inkjet printer includes a platen, a printing head, a feeding device, a pre-heater and a print heater. The printing head is configured to move in a right-left direction above the platen and to eject solvent ink from nozzles of the printing head on a printing surface of a medium at a printing position. The feeding device is configured to feed the medium on the platen in a forward direction substantially perpendicular to the right-left direction. The temperature controller is configured to control a pre-heater heating temperature of the pre-heater and a print heater heating temperature of the print heater such that a surface temperature of the printing surface of the medium at the printing position becomes within a range of from 30° C. to 70° C.07-12-2012
20090021550Continuous media web heater - A radiant heating comprises a housing having an opening for positioning adjacent a media web in an imaging device. A pair of radiant heating panels is positionable in the housing to any one of a plurality of positions between and including a fully open position in which the pair of radiant heating panels are positioned side by side in the opening of the housing and facing the media web and a retracted position in which the pair of radiant heating panels are inside the housing and facing each other. The radiant panels are configured to emit thermal radiation in accordance with a variable thermal output signal. A panel driver is operably coupled to the pair of radiant heating panels for positioning the pair of radiant heating panels to at least one of the plurality of positions in response to a variable view factor signal.01-22-2009
20090015619INK SUPPLY DEVICE AND INKJET IMAGE FORMING APPARATUS HAVING THE SAME - An ink supply device to maintain temperature uniformity of ink via active heating and cooling of the ink, and an inkjet image forming apparatus having the same includes at least one thermoelectric element to adjust a temperature of ink to be supplied to an inkjet head. With heating and cooling of the thermoelectric element, preventing deterioration in image quality caused by a change of ink temperature and to achieve improved print quality is possible.01-15-2009
20120327153APPARATUS AND METHOD FOR DETERMINING AND ADJUSTING PRINTHEAD PRESSURE - The present invention is directed to an apparatus and method for determining and adjusting printhead pressure of a thermal printer. The apparatus includes a printhead support housing operable for placement in a print station of a printer. A motor housed within the printhead support housing and being operable for driving a plurality of synchronized rotating gears, the gears being mounted about posts wherein the posts are configured to cause the gears to compress or decompress a set of biasing mechanisms mounted below the gears and connected to the printhead. A sensor unit operable for monitoring the thickness of a print media and in communication with a control circuit operable for adjusting the printhead pressure being applied to the print media during a print operation, wherein the printhead pressure corresponds to a pre-defined level relative to the thickness of the print media.12-27-2012
20120092408LIQUID EJECTING HEAD UNIT - A liquid ejecting head unit includes: a liquid ejecting head that ejects a liquid through nozzles by driving a pressure generation element to cause the pressure within a pressure chamber to fluctuate; a flow channel member in which is formed a flow channel that supplies the liquid to a head flow channel of the liquid ejecting head; a substrate, mounted to a side surface of the flow channel member, on which is mounted an electrical component for supplying power to the pressure generation element; and a temperature measurement device provided on the surface of the substrate that faces the flow channel member. Here, the flow channel member includes an opening that passes therethrough toward the flow channel; and the temperature of the liquid within the flow channel is measured by the temperature measurement device that is provided facing the opening.04-19-2012
20130010027INKJET RECORDING HEAD - An inkjet recording head includes plural element substrates and a coolant flow channel. Each of the plural element substrates is provided with an ejection port surface and plural energy generating elements. The coolant flow channel is provided with a first heat transfer portion overlapping, in a direction vertical to the ejection port surface, a central portion of each of the element substrates in a direction in which the plural energy generating elements are arranged, and a second heat transfer portion overlapping, in the vertical direction, an area between the plural element substrates which adjoin in the arranged direction. The first heat transfer portion and the second heat transfer portion are provided with recesses or projections, and arrangement density of the recesses or the projections of the first heat transfer portion being greater than that of the second heat transfer portion.01-10-2013
20130016152LIQUID DROPLET EJECTING HEAD, INK CARTRIDGE, AND IMAGE FORMING APPARATUSAANM NONOYAMA; YusukeAACI KanagawaAACO JPAAGP NONOYAMA; Yusuke Kanagawa JPAANM YAMAGUCHI; KiyoshiAACI KanagawaAACO JPAAGP YAMAGUCHI; Kiyoshi Kanagawa JP - A liquid droplet ejecting head is disclosed, including a nozzle hole which ejects liquid droplets; an ejecting liquid chamber which is in communication with outside via the nozzle hole and which contains an ejecting liquid to be the liquid droplets; a pressure generating unit which generates pressure within the ejecting liquid chamber; a temperature detecting unit which detects temperature at a location at which is arranged a temperature measuring resistive body; and a pressure control unit which controls an output of the pressure generating unit based on detected results of the temperature detecting unit, wherein the pressure generating unit is configured to increase pressure within the ejecting liquid chamber, so that the ejecting liquid within the ejecting liquid chamber is ejected from the nozzle hole as the liquid droplets, and wherein the temperature measuring resistive body is arranged at the ejecting liquid chamber forming member.01-17-2013
20080238980LIQUID CIRCULATION APPARATUS, IMAGE FORMING APPARATUS AND LIQUID CIRCULATION METHOD - A liquid circulation apparatus includes: a plurality of liquid ejection elements each of which includes a nozzle, a pressure chamber which is connected to the nozzle and accommodates liquid, and a piezoelectric element which displaces a wall of the pressure chamber to eject the liquid in the pressure chamber through the nozzle; a plurality of individual supply channels which are respectively connected to the liquid ejection elements; a common supply channel which is connected to the individual supply channels, the liquid being supplied from the common supply channel to the liquid ejection elements through the individual supply channels; a plurality of individual circulation channels which are respectively connected to the liquid ejection elements; a common circulation channel which is connected to the individual circulation channels, the liquid being circulated from the liquid ejection elements to the common circulation channel through the individual circulation channels; and a control device which controls a circulation volume of the liquid circulated from the liquid ejection elements to the common circulation channel, by adjusting a supply volume of the liquid supplied from the common supply channel to the liquid ejection elements in accordance with an ejection volume of the liquid ejected from the liquid ejection elements.10-02-2008
20080231650BACK PRESSURE ADJUSTMENT APPARATUS FOR LIQUID EJECTION HEAD - The back pressure adjustment apparatus for a liquid ejection head has: a container having a liquid accommodating chamber which is connected to the liquid ejection head and accommodates liquid to be supplied to the liquid ejection head, and a gas accommodating chamber which accommodates gas; a movable film which separates the liquid accommodating chamber and the gas accommodating chamber, and forms a portion of whole walls of the liquid accommodating chamber; and a pressure adjustment device which causes all or a portion of the movable film to deform so as to adjust pressure of the liquid accommodated in the liquid accommodating chamber.09-25-2008
20110261104INK-JET RECORDING APPARATUS - A recording apparatus includes: a recording head; a temperature detection unit; a first heating element configured to maintain a temperature of the recording head and a second heating element configured to discharge the ink; an acquisition unit configured to acquire at a plurality of predetermined intervals the temperature detected by the temperature detection unit; a first averaging unit configured to obtain an average temperature based on the temperatures acquired by the acquisition unit in a first period; a first drive unit configured to drive the first heating element based on the average temperature obtained by the first averaging unit; a second averaging unit configured to obtain an average temperature based on the temperatures acquired by the acquisition unit in a second period and longer than the first period; and a second drive unit configured to drive the second heating element based on the average temperature obtained by the second averaging unit.10-27-2011
20130176357PRINTING APPARATUS CONTROL METHOD FOR PRINTING APPARATUS - Provided is an printing apparatus and temperature detecting method that can accurately obtain temperature of a printing element substrate and output a high-quality image at high resolution and high speed. For this purpose, a first temperature sensor outputting signals through a first output line and a second temperature sensor outputting signals through a second output line that is longer than the first output line are provided on the printing element substrate. In addition, the switch between the case of using detected temperatures obtained from both of the first temperature sensor and the second temperature sensor to calculate the temperature of the printing element substrate, and the case of using only detected temperature obtained from the first temperature sensor to calculate the temperature of a printing element substrate is made. On the basis of this, it is avoided that inaccurate temperature of a printing element substrate is obtained caused of noises.07-11-2013
20130135381PRINTING APPARATUS - This invention has been made to judge the discharge state of each nozzle accurately at an appropriate timing. For this purpose, an apparatus using a printhead including a heater and a temperature sensor has the following arrangement. A temporal change in a detected temperature is monitored upon driving the printhead. During the temperature drop, temperatures are extracted at plural points of a time interval including a timing at which a feature point of the temporal change in the detected temperature in normal discharge appears. The second derivative of the temperature is calculated and added to obtain a total sum and intermediate sum. The total sum is compared with predetermined first and second thresholds to judge whether to normally discharge ink. If normal discharge or discharge failure is uncertain, the intermediate sum is compared with a third threshold for final judgment.05-30-2013
20130113858MEDIA PROCESSING DEVICE WITH ENHANCED MEDIA AND RIBBON LOADING AND UNLOADING FEATURES - A device for processing media may include a printhead pressure adjustment assembly including a barrel and a biasing element configured to apply a biasing force to the printhead, where the biasing force may be adjustable in response to the barrel being rotated about its axis. The printhead pressure adjustment assembly may further include a threaded insert received within the barrel and configured to move axially within the barrel in response to the barrel being rotated. The printhead pressure adjustment assembly may further include a cup received within the barrel and attached to the biasing element. The adjustment assembly may include a spring disposed between the threaded insert and the cup, where the spring is compressed in response to the barrel being rotated in a first direction and the spring is decompressed in response to the spring being rotated in a second direction.05-09-2013
20130093812INK RESERVOIR CONTAINING STRUCTURE - Ink reservoir subassemblies for phase change ink can be designed and configured to include at least one structure comprising elements disposed within the ink reservoir. The elements may include fibers and/or beads that occupy a majority of a volume of the reservoir. The elements may provide enhanced thermal conductivity, ink filtering and/or bubble reduction.04-18-2013
20130093813PRINTER AND METHOD FOR CONTROLLING POWER CONSUMPTION THEREOF - A printer having an internal electrical power supply is disclosed herein. A method for controlling power consumption in the printer includes receiving an image to be printed, calculating an estimated temperature of the printer, and controlling a speed of the printer to control the power consumption to keep a temperature of the printer below a predetermined maximum temperature in response to the estimated temperature.04-18-2013
20130100196WEATHER BASED HUMIDITY ADJUSTMENT OF PRINTHEAD MAINTENANCE - A method of controlling a maintenance operation of an inkjet printhead in an inkjet printer, the method includes providing at least one parameter of the maintenance operation as a function of humidity condition; receiving data corresponding to a current outdoor humidity condition; determining a humidity condition corresponding to the current outdoor humidity condition; and controlling the maintenance operation, wherein the at least one parameter is determined in accordance with the determined humidity condition.04-25-2013
20130100197INDOOR HUMIDITY CONDITION ADJUSTMENT OF PRINTHEAD MAINTENANCE - A method of controlling a maintenance operation of an inkjet printhead in an inkjet printer, the method includes providing at least one parameter of the maintenance operation as a function of humidity condition; providing a humidity sensor external to the inkjet printer; receiving data from a humidity sensor external to the inkjet printer, which data corresponds to a current indoor humidity condition where the inkjet printer is located; determining a humidity condition corresponding to the current indoor humidity condition; and controlling the maintenance operation, wherein the at least one parameter is determined in accordance with the determined humidity condition.04-25-2013
20130100195GEOGRAPHICALLY BASED HUMIDITY ADJUSTMENT OF PRINTHEAD MAINTENANCE - A method of controlling a maintenance operation of an inkjet printhead in an inkjet printer, the method includes providing at least one parameter of the maintenance operation as a function of humidity condition; providing a table of average humidity conditions for a geographic locale in which the printer is located; providing a current date; determining a humidity condition corresponding to the current date; and controlling the maintenance operation, wherein the at least one parameter is determined in accordance with the determined humidity condition.04-25-2013
20130169710DUAL REGULATOR PRINT MODULE - A print module includes a printhead die, an input regulator to regulate input fluid pressure to the die, and an output regulator to regulate output fluid pressure from the die. A method includes receiving fluid at an input regulator to a print module, creating a fluid pressure differential within the print module between the input regulator and an output regulator, flowing fluid from the input regulator through a printhead die and to an output regulator using the pressure differential, and drawing fluid from the output regulator.07-04-2013
20130127945REFRIGERATED INK JET DEVICE AND METHOD IMPLEMENTING SUCH A DEVICE - In the inkjet printing method according to the invention, ink is ejected at a temperature lower than or equal to 20° C., advantageously ranging between −20° C. and 20° C. The corresponding device comprises a temperature regulation system selected from among: a system for cooling the ink reservoir; a system for cooling the nozzles, advantageously with an in situ Peltier effect; a climatic chamber, advantageously at controlled temperature and humidity, intended to receive the printing device or the nozzles only.05-23-2013
20110273505RECORDING APPARATUS AND HUMIDIFICATION DEVICE - A humidification unit has a structure in which a first humidification chamber and a second humidification chamber are connected in series. Humidified gas produced in the humidification unit and having a high humidity is supplied to a space where nozzles of a recording head are exposed and produces a flow current.11-10-2011
20110273506IMAGE FORMING APPARATUS - An image forming apparatus includes a recording head configured to jet a liquid; a liquid tank configured to store the liquid; and a supply tube having flexibility, the supply tube being provided between the liquid tank and the recording head, wherein the supply tube includes a first flow path through which the liquid flows from the liquid tank to the recording head, and a second flow path surrounding the first flow path, the second flow path being a path through which a temperature control liquid flows, the temperature control liquid controlling a temperature of the liquid flowing through the first flow path.11-10-2011
20100302301PRINTING APPARATUS AND PRINTING METHOD - There is an object of providing a printing apparatus which can restrict a variation in ejection characteristic of an ink droplet due to a temperature change of a printing head to restrict degradation in an image. The printing apparatus adjusts temperatures of the print head to first and second temperature so as to measure ejection characteristics of the print head at the first and second temperature. Then, a driving condition is generated based on the measured ejection characteristics and a printing is performed based on the measured ejection characteristics.12-02-2010
20100309244IMAGE FORMING APPARATUS WHICH ADJUSTS INK TEMPERATURE - An image forming apparatus estimates a temperature at nozzles in consideration of temperature changes in a recording head, by temperature sensors provided at an ink supply port and an ink eject port in the recording head. From the estimated temperature and a temperature difference between when feeding ink and when ejecting ink, a temperature control based on heating/cooling is performed by combining a fan and a heater with heating/cooling based on the peltier element, so as to fall within a drivable temperature range in which the nozzles properly discharge ink.12-09-2010
20110242184IMAGE FORMING DEVICE - An image forming device including a droplet ejection head, a medium temperature detection unit, a storage unit and a medium temperature control unit. The droplet ejection head ejects droplets including a volatile component at a recording medium. The medium temperature detection unit detects a temperature of the recording medium. The storage unit stores impact area information representing a relationship between temperatures of the recording medium and impact areas of droplets impacting on the recording medium. On the basis of the temperature of the recording medium detected by the medium temperature detection unit and the impact area information stored by the storage unit, the medium temperature control unit controls the temperature of the recording medium such that the impact areas of the droplets impacting on the recording medium become a pre-specified impact area.10-06-2011
20130155138System For Detecting Leakage of Phase Change Inks - A printing apparatus includes a printhead module having an ink leakage detector to detect a leaked phase change ink. The ink leakage detector includes a plurality of resistance temperature detectors or resistive thermal devices to detect the leaked phase change ink. A horizontally mounted overdriven thermistor can also be used to detect leaked ink.06-20-2013
20120281039LIQUID EJECTING APPARATUS AND LIQUID EJECTING METHOD - A liquid ejecting apparatus includes a carriage that has a head ejecting liquid cured by receiving the irradiation of light and moves in a movement direction intersecting a transportation direction of a medium; a first irradiation section; a second irradiation section; and a controller that forms the image on the medium through performing an ejection operation ejecting the liquid from the head while moving the carriage in the movement direction and a transportation operation that transports the medium in the transportation direction, and performs control of the irradiation intensity of the light of the first irradiation section at the time of the ejection operation to regulate the surface condition of the image and to change the irradiation intensity of the light of the second irradiation section according to the irradiation intensity of the light of the first irradiation section.11-08-2012
20120007909LIQUID EJECTING HEAD, LIQUID EJECTING HEAD UNIT, AND LIQUID EJECTING APPARATUS - Provided is a liquid ejecting head, a liquid ejecting head unit, and a liquid ejecting apparatus are provided that can secure sufficient compliance in a manifold and prevent degradation in liquid dispensing characteristic. In the liquid ejecting head, a flow path plate including pressure chambers arranged in a row, a manifold plate including a manifold communicating with the pressure chambers, thus constituting a common liquid chamber, a compliance plate that seals the manifold, and a nozzle plate including a nozzle orifice communicating with the pressure chamber so as to eject a liquid, are stacked in this order. The compliance plate includes a flexible compliance portion formed in a region opposing the manifold, and the nozzle plate includes a through hole formed in a region opposing the compliance portion.01-12-2012
20120019585Inkjet Printing System Having Environmentally Responsive Thermal Control Mode - A method has been developed that reduces the electrical energy consumption of an inkjet printing system. The method regulates the energy consumption of the printing system with reference to a monitored temperature of at least one component in the inkjet printing system.01-26-2012
20130194341CONVEYING DEVICE AND PRINTING APPARATUS - Provided are an image scanning device that can prevent a rise in the temperature and overloading or overheating of a conveying motor during continuous conveying of document sheets, and a conveying device that includes the image scanning device. According to the present invention, the temperature of a drive motor and the temperature of the periphery of the drive motor are predicted, and based on the predicted values, the conveying mode is selected.08-01-2013
20130201242PRINTING APPARATUS AND METHOD OF SUPPRESSING RISE OF TEMPERATURE OF INK STORAGE UNIT - A printing apparatus includes an ink storage unit; a print head unit which has an ink reception port, an ink discharging device, and an ink exhaust port; an ink return path which is connected to the ink exhaust port and which returns ink exhausted from the ink exhaust port to the ink storage unit; and a cooling device which is arranged in the ink return path and which cools ink which passes through the ink return path.08-08-2013

Patent applications in class Of temperature or pressure of device or component thereof

Patent applications in all subclasses Of temperature or pressure of device or component thereof