Entries |
Document | Title | Date |
20080211877 | Inkjet Printhead Having Nozzle Arrangements With Ink Spreading Prevention Rims - Provided is an inkjet printhead having a plurality of nozzle arrangements. Each nozzle arrangement includes walls defining an ink chamber. The chamber includes an ink supply channel and an ink ejection port with an ink spreading prevention rim. Each nozzle arrangement also includes a thermal actuator mechanism configured to operatively eject ink from the chamber via the ejection port. The ink spreading prevention rim defines a pit for preventing ink from flowing across a surface of the ink jet printhead and affecting operation of said printhead. | 09-04-2008 |
20080211878 | NOZZLE ARRANGEMENT WITH A THERMAL ACTUATOR INCORPORATING HEAT SINKS - The present invention relates to a nozzle arrangement for an inkjet printer. The nozzle arrangement includes a substrate assembly defining an inlet channel. A nozzle chamber wall and a roof wall are collectively positioned on the wafer substrate to define a nozzle chamber in fluid communication with the inlet channel. The roof wall defines an ejection port in fluid communication with the nozzle chamber. A thermal actuator is mounted to the substrate assembly and extends into the nozzle chamber to terminate in a free end. The thermal actuator includes a pair of actuating members spaced apart to form a gap and a heat sink assembly positioned in the gap. One of the actuating members is connected to an electrical supply so that differential expansion between the actuating members can cause movement of the free end and results in the ejection of ink in the nozzle chamber from the ejection port. | 09-04-2008 |
20080211879 | Pagewidth inkjet printhead assembly with nozzle arrangements having actuator arms configured to be in thermal balance when in a quiescent state - Provided is a pagewidth inkjet printhead assembly having a plurality of nozzle arrangements. Each nozzle arrangement includes walls defining an ink chamber having an ink supply channel and an ink ejection port. The ink ejection port includes an ink spreading prevention rim. Each nozzle arrangement also includes a thermal actuator mechanism configured to operatively eject ink from the chamber via the ejection port. The actuator mechanism includes an actuator arm having two layers which are formed from a resiliently flexible conductive material. The arm includes the two layers surrounding a central material layer so that said two layers are in thermal balance with the arm in a quiescent state. | 09-04-2008 |
20080231664 | LIQUID EJECTION HEAD AND LIQUID EJECTION METHOD - A print head, which ejects ink by using a method whereby a bubble generated by a heat generating element communicates with the air, and for which the occurrence of cavitation is deterred and the durability is improved, is provided. According to the print head, a bubble grows until the maximum volume is attained, and then, at a volume reduction step, communicates with the air. As a result, a liquid in a bubble generation chamber is ejected. An ejection port and the heat generating element are arranged so that the center of the ejection port is shifted away from the center of the heat generating element in a direction leading from an ink supply port to the ejection port. | 09-25-2008 |
20080239007 | PRINT HEAD - The present invention provides a print head that allows the characteristics of ejected ink to be adjusted for each ejection port in spite of a variation in the distance from an ink supply port to the heating element. In the print head according to the present invention, the area of the heating element decreases with increasing distance from the ink supply port and increases with decreasing distance from the ink supply port. The heating element is shaped like a rectangle that is longer in a direction orthogonal to a direction in which the plurality of ejection ports are arranged than in the direction in which the plurality of ejection ports are arranged. The aspect ratio of the heating element depends on the length of an ink channel through which ink is introduced into the bubbling chamber. | 10-02-2008 |
20080239008 | Pagewidth Inkjet Printhead With Ink Ejection Devices Having A Series Of Protrusions To Facilitate Ink Ejection - Provided is a pagewidth inkjet printhead which has a plurality of ink ejection devices. Each of these devices includes a substrate defining a fluid chamber having a fluid outlet nozzle and a fluid supply channel respectively defined in opposite walls of the chamber. The chamber also defines chamber wall edge portions. Each ejection device also includes a thermal actuator and a nozzle paddle operatively located in the chamber between the edge portions. The paddle is operatively displaceable upwards by the actuator to eject ink from the fluid outlet nozzle, with the paddle spaced from the chamber wall edge portions so that ink is able to flow between a front and rear of the paddle to allow refilling of the chamber with ink via the supply channel. The paddle is further formed with a series of protrusions in a central portion thereof, the protrusions aiding in reducing outward ink flow from the centre of the paddle as the paddle moves upward. | 10-02-2008 |
20080246817 | Nozzle Arrangement With Control Logic Architecture For An Ink Jet Printhead - A nozzle arrangement for a pagewidth inkjet printhead assembly includes a substrate that defines an ink supply channel. Walls define an ink chamber in fluid communication with the ink supply channel and an ink ejection port in fluid communication with the fluid chamber and having an ink spreading prevention rim. A thermal actuator mechanism is arranged in the substrate and is configured to eject ink from the chamber via the ejection port. The mechanism has a thermal actuator arm capable of deflection as a result of relative thermal expansion. Control logic architecture is on the substrate for controlling the thermal actuator arm. The architecture has a number of successive shift registers each having a data input and a data output. A transfer register is arranged to receive the data output from a last shift register. A firing control gate has an enabling input and a gate data input that receives an output from the transfer register. The gate operatively drives the thermal actuator according to the enabling and gate data inputs. | 10-09-2008 |
20080246818 | INKJET PRINTHEAD WITH TWO-PART BODY STRUCTURE CONTAINING HEATER ELEMENTS - An inkjet printhead includes a “first part” wafer assembly. The wafer assembly defines an elongate ink supply channel and an ink inlet extending from the ink supply channel. A “second part” chamber roof layer is supported by the wafer assembly. The chamber roof layer defines an elongate ink conduit in fluid communication with the ink supply channel and nozzle chambers in fluid communication with the ink conduit. In addition, the chamber roof layer includes a row of nozzle apertures, aligned with the ink conduit and through which ink from nozzle chambers can be ejected. Heater elements contained within the two parts are suspended within nozzle chambers which, upon actuation, eject ink from the chambers out through the nozzle apertures. | 10-09-2008 |
20080273062 | PAGEWIDTH PRINTHEAD WITH NOZZLE ARRANGEMENTS FOR WEIGHTED INK DROP EJECTION - Provided is a pagewidth printhead with a controller, the printhead having a plurality of micro-electromechanical nozzle arrangements. Each nozzle arrangement includes a multilayered substrate defining an ink inlet passage and walls extending from the substrate. Also included is a nozzle plate supported by the walls to define a nozzle chamber in fluid communication with the ink inlet passage, the nozzle plate having a nozzle rim defining an ejection port in fluid communication with the nozzle chamber. Each arrangement also includes a plurality of heater elements suspended between the walls in the chamber, so that when electrical actuation energy is applied to respective heater elements a vapour bubble is formed in the fluid leading to a pressure increase in the chamber thereby ejecting the fluid via the ejection port. The controller is configured to individually actuate respective heater elements to facilitate weighted ink drop volumes to be ejected from the nozzle arrangement. | 11-06-2008 |
20080297566 | INKJET PRINTHEAD NOZZLE ARRANGEMENT HAVING NON-COINCIDENT ELECTRODES - Provided is an inkjet printhead nozzle arrangement including side walls located on a wafer substrate with a roof layer deposited on said walls to define an ink chamber, the roof layer defining a nozzle aperture, and an inlet defined in the substrate to supply the ink chamber with printing fluid. The arrangement also includes at least one heater element having two opposite sides parallel to a plane of the ejection aperture and configured such that a gas bubble formed by that heater element is formed at both of said sides. The heater elements and associated electrodes are arranged in the chamber so that the electrodes are non-coincident and have an annular shape with a point of collapse of the bubble near a centre thereof. | 12-04-2008 |
20080303870 | Ink Jet Device for the Positioning of a Substance Onto a Substrate, Method for the Positioning of a Substance Onto a Substrate and Use of an Ink Jet Device - The invention provides an ink jet device for the positioning of a substance onto a substrate, the device comprising at least a print head comprising a nozzle provided to eject a droplet comprising the substance, the ink jet device further comprising at least one heating element arranged such that the substrate can be heated prior to, during and/or after the landing of a droplet on the substrate. | 12-11-2008 |
20090002455 | HEAD CHIP USABLE WITH INKJET IMAGE FORMING APPARATUS AND MANUFACTURING METHOD OF THE SAME - A head chip for an inkjet image forming apparatus. The head chip can include a heater formed on a substrate to generate heat, a chamber layer formed on the heater and provided with an ink chamber that receives inks, a nozzle layer formed on the chamber layer and provided with a nozzle in correspondence with the ink chamber, and a heat transfer layer transferring a part of the heat from the heater to the nozzle. According to the head chip, the inks sprayed through the nozzle are heated by the heat transferred through the heat transfer layer. Thus, the viscosity of the inks is reduced, so that the inks can be easily cut into ink droplets having a substantially spherical shape. | 01-01-2009 |
20090002456 | Inkjet Printhead Having High Areal Inkjet Nozzle Density - An inkjet printhead is provided having a nozzle areal density of at least 40000 inkjet nozzles per square centimetre on a printing surface. Each nozzle has an ink chamber on the printing surface having an ink ejection port, and a heater for heating the ink in the chamber to cause ink ejection from the ink ejection port. | 01-01-2009 |
20090040276 | PRINTHEAD WITH HEATERS OFFSET FROM NOZZLES - A thermal inkjet printhead of the roof shooter type that slightly offsets the nozzle aperture centroid from the heater element centroid to correct drop trajectory misdirection caused by vapor bubble asymmetries. | 02-12-2009 |
20090046128 | FLUID TRANSFER DEVICE - Embodiments of a fluid transfer device are disclosed. | 02-19-2009 |
20090058946 | PRINTHEAD UNIT CELL HAVING WELLED HEATER ELEMENT - A unit cell of a printhead is provided having a multi-layer substrate defining an ink inlet, one or more side walls extending from the substrate around the ink inlet, a nozzle plate supported by the side walls to define a chamber in fluid communication with the ink inlet, where the nozzle plate defines an aperture through which ink in the chamber can be ejected, and a looped and elongate heater element suspended within the chamber, which can be heated so that bubbles are generated in ink within the chamber and ink is ejected from the aperture. The elongate heater element terminates in a peripheral well in which the side walls are received. | 03-05-2009 |
20090058947 | INK DROP EJECTION DEVICE WITH NON-BUCKLING HEATER ELEMENT - A ink drop ejection device | 03-05-2009 |
20090066761 | INKJET HEATER WITH HEATER ELEMENT SUPPORTED BY SLOPED SIDES WITH LESS RESISTANCE - An inkjet printhead that has a chamber for holding a quantity of ink, a nozzle in fluid communication with the chamber, a pair of electrodes and, a heater for generating a vapour bubble in the ink to eject a drop through the nozzle. The heater has contacts for electrical connection with the pair of contacts, a heater element suspended in the chamber between the contacts and the nozzle, and sloped side portions extending between the heater element and the contacts. The heater element has higher electrical resistance than the contacts and the sloped side portions. | 03-12-2009 |
20090073233 | MICRO-ELECTROMECHANICAL NOZZLE ARRANGEMENT WITH A ROOF STRUCTURE FOR MINIMIZING WICKING - Provided is a micro-electromechanical nozzle arrangement for an inkjet printhead. The arrangement includes a substrate defining an inverted pyramidal ink chamber with a vertex thereof terminating at an ink supply channel through the substrate, said substrate having a layer of CMOS drive circuitry. The arrangements also includes a roof structure connected to the drive circuitry layer and covering the ink chamber, the roof structure defining a fluid ejection nozzle rim above said chamber in addition to ink flow guide rails to minimize wicking along the nozzle rim according to surface tension effects of ink in the chamber. Also included is a plurality of actuators displaceable with respect to, and radially spaced about, the nozzle rim, and in between, the guide rails. Each actuator has a serpentine heater element configured to thermally expand upon receiving current from the drive circuitry thereby moving said actuators into the chamber operatively increasing a fluid pressure inside the chamber to eject a drop of ink via the ejection nozzle. | 03-19-2009 |
20090073234 | HEATING CHANNEL UNIT, LIQUID EJECTING HEAD, AND LIQUID EJECTING APPARATUS - A heating channel unit which includes a communicating channel for supplying liquid from a liquid supply source to a liquid ejecting head. The heating channel unit is detachably mounted between the liquid supply source and the liquid ejecting head, and includes a heat generator which heats the liquid in the communicating channel. | 03-19-2009 |
20090073235 | PRINTER SYSTEM HAVING PRINTHEAD WITH ARCUATE HEATER ELEMENTS - A printer system is provided which incorporates a printhead having nozzles, bubble forming chambers and heater and non-heater elements disposed in each of the chamber to overlay one another with a space therebetween. The heater and non-heater elements are formed of the same material and the heater elements are connected to electrodes so as to be in thermal contact with a bubble forming liquid in the chambers. Heating the heater elements with the electrodes to a temperature above the boiling point of the bubble forming liquid forms a gas bubble that causes the drop ejection of ejectable liquid through the nozzles. Each heater element has a bubble nucleation section which has a smaller cross section than the remainder of that heater element. Each chamber has a circular cross section and each heater element has arcuate sections that are concentric with the circular cross section. | 03-19-2009 |
20090073236 | VARIABLE-VOLUME NOZZLE ARRANGEMENT - A nozzle arrangement is provided for an inkjet printhead. The nozzle arrangement includes a substrate assembly defining an ink inlet. A static wall extends from the substrate assembly and bounds the ink inlet. An active ink ejecting member has a roof and a sidewall that depends from the roof towards the substrate. The roof defines an ink ejection port and the active ink ejecting member is movably located relative to the static wall to define a variable-volume nozzle chamber. An actuator arrangement is configured to reciprocate the active ink ejection member relative to the static wall so that ink in the nozzle chamber is ejected out through the ink ejection port. | 03-19-2009 |
20090073237 | NOZZLE DEVICE WITH EXPANSIVE CHAMBER-DEFINING LAYER - A nozzle device is provided for an inkjet printhead. The nozzle device includes a substrate assembly defining an ink supply. A chamber-defining layer defines a nozzle chamber in fluid communication with a nozzle opening and the ink supply. An actuating arm is coupled to the substrate assembly and terminates in a paddle separating the ink supply and the nozzle chamber. The arm includes a thermal bend portion proximal to the substrate assembly, and is configured to bend during actuation so that the paddle moves and causes ink within the nozzle chamber to be ejected out through the nozzle opening. | 03-19-2009 |
20090073238 | PRINTHEAD HAVING SUSPENDED HEATER ELEMENTS - An inkjet printhead is disclosed. The printhead includes a substrate defining a plurality of ink inlet passages; a plurality of nozzle chambers formed on the substrate, each nozzle chamber being in fluid communication with at least one of the ink inlet passages, and at least one heater element suspended in each nozzle chamber, each heater element, when energized by an electrical signal, forms a gas bubble in ink in the nozzle chamber so that a drop of ink is ejected from the nozzle chamber. | 03-19-2009 |
20090073239 | NOZZLE ARRANGEMENT FOR A PRINTHEAD INTEGRATED CIRCUIT - A nozzle arrangement for a printhead integrated circuit id disclosed. The arrangement includes an ink chamber having an ink ejection port, an ink ejecting member angularly displaceable within the ink chamber, a thermal bend actuator reciprocally displaceable upon receipt of a drive signal, a motion transmitting structure comprising an effort formation, a lever arm formation and a load formation, the lever arm formation being interposed between the effort formation and the load formation, the effort formation being connected to the thermal bend actuator and the ink election member being connected to the load formation, and a resiliently deformable sealing structure, interposed between a substrate upon which the nozzle arrangement is formed and the lever arm formation, to permit pivotal movement of the lever arm formation with respect to the substrate. Reciprocal displacement of the thermal bend actuator is converted into reciprocal displacement of the ink ejecting member through the motion transmitting structure, thereby ejecting ink that is in the ink chamber from the ink ejection port. | 03-19-2009 |
20090079795 | LIQUID EJECTING APPARATUS - A liquid ejecting apparatus includes a supporting member that supports a target transported from the upstream side; a liquid ejecting head that ejects liquid toward the target supported by the supporting member; a supporting mechanism that supports the supporting member; and a heating device that heats the supporting member, in which the supporting mechanism supports the supporting member so as to allow the supporting member to be thermally expanded in the direction parallel to a supporting surface of the supporting member, which is a surface that supports the target. | 03-26-2009 |
20090079796 | PAGEWIDTH PRINTHEAD ARRANGEMENT WITH A CONTROLLER FOR FACILITATING WEIGHTED INK DROP EJECTION - Provided is a pagewidth printhead arrangement for an inkjet printer having a print engine controller. The arrangement has a wafer substrate that defines a plurality of ink inlets. A plurality of nozzles each including side walls are located on a wafer substrate with a roof portion attached to said walls to define an ink chamber. The roof portion defines an ejection port. The arrangement also includes an inlet defined in the substrate to supply the ink chamber with ink. A heater element is suspended between the side walls in the ink chamber, so that when electrical actuation energy is applied to respective heater elements, a vapour bubble is formed in the ink leading to a pressure increase in the chamber thereby ejecting the ink via the ejection port. The controller is configured to actuate the heater element to facilitate weighted ink drop volumes to be ejected from the nozzle arrangement. | 03-26-2009 |
20090085979 | LIQUID EJECTION METHOD, LIQUID EJECTION HEAD AND LIQUID EJECTION APPARATUS - The liquid ejection method of ejecting liquid from a nozzle, includes the steps of: growing a column of the liquid from the nozzle; and injecting a bubble into a base of the column of the liquid during growth thereof from the nozzle, by using a bubble supply device which supplies a bubble. | 04-02-2009 |
20090085980 | PRINTHEAD WITH NOZZLE ARRANGEMENTS INCORPORATING FLUIDIC SEALS - Provided is a printhead having a plurality of nozzle arrangements. Each arrangement includes a substrate which defines an ink inlet aperture with a wall portion bounding the ink inlet aperture and a crown portion defining a nozzle opening. Each arrangement also includes a skirt portion depending from the crown portion to form part of a peripheral wall of the nozzle assembly. The crown and skirt portions are displaceable with respect to the wall portion towards the substrate to alter a volume of a nozzle chamber defined by the wall, crown and skirt portions such that when the volume is altered, ink is ejected from the nozzle opening. Each arrangement also includes a thermal actuator that interconnects the crown and skirt portions with the substrate, the actuator for displacing the crown and skirt portions. The wall portion and skirt portion are configured to define a fluidic seal to inhibit the egress of ink during such displacement. | 04-02-2009 |
20090096838 | INK JET RECORDING HEAD - An ink jet recording head is constituted by a plurality of recording element substrates each including at least one nozzle array having a plurality of nozzles for ejecting ink and heat generating resistors for ejecting the ink by thermal energy, a common liquid chamber having an introducing port for supplying the ink to the nozzles and a discharging port for discharging the introduced ink outside the ink jet recording head, and a supporting member on which the recording element substrates are mounted and in which a plurality of individual liquid chambers for supplying the ink to associated ones of the recording element substrates and a plurality of ink inlet ports for supplying the ink from the common liquid chamber to associated ones of the individual liquid chambers are formed. The individual liquid chambers are arranged in a direction of flow of the ink flowing from the ink introducing port toward the discharging port. At least in an upstreammost individual liquid chamber with respect to the direction, a center line of an associated inlet port with respect to the direction is located downstream of a center line of with respect to the direction. | 04-16-2009 |
20090141086 | Inkjet Printhead Unit Cell With Heater Element - A unit cell for an inkjet printhead includes a substrate that defines an ink inlet passage, the substrate incorporating drive circuitry. Side walls are arranged on the substrate. A nozzle plate is arranged on the side walls such that the nozzle plate and the side walls define an ink chamber in fluid communication with the inlet passage. The nozzle plate defines an aperture in fluid communication with the ink chamber. A heater element is connected to the drive circuitry. The heater element is configured to generate a bubble of ink to be ejected from the aperture on receipt of an electrical signal from the drive circuitry. The heater element is suspended in the ink chamber such that, when ink is supplied to the chamber, the heater element is immersed in the ink. The heater element is configured so that a collapse point of the bubble is at a position spaced from the heater element. | 06-04-2009 |
20090147055 | Inkjet Nozzle Arrangement Incorporating Thermal Differential Actuation - A nozzle arrangement for an inkjet printhead includes a wafer substrate that defines an inlet channel and incorporates CMOS layers to generate electrical drive signals. A nozzle chamber wall and a roof wall are positioned on the wafer substrate to define a nozzle chamber in fluid communication with the inlet channel, the roof wall defining an ink ejection port in fluid communication with the nozzle chamber. A paddle is positioned in the nozzle chamber and is reciprocally displaceable to eject ink from the ejection port. An actuating arm extends through the nozzle chamber wall and is connected to the paddle. The actuating arm has an actuating portion having a pair of actuating members. One of the actuating members defines a heating circuit such that, on receipt of an electrical signal to the exclusion of the other actuating member, the actuating arm is displaced in one direction as a result of differential thermal expansion. The actuating arm is of a resiliently flexible material such that, when the electrical signal is cut off, the actuating arm is displaced in an opposite direction. | 06-11-2009 |
20090174753 | HEAD SUBSTRATE, PRINTHEAD, HEAD CARTRIDGE, AND PRINTING APPARATUS - The objective of this invention is to provide a head substrate capable of integrating driver transistors while keeping the size small even at high nozzle density, and integrating a functional circuit such as a temperature sensor or energy adjustment circuit. To achieve this, an ink supply port, a heater array which is arrayed along the longitudinal direction of the ink supply port and includes a plurality of heaters, a transistor array which is arrayed along the arrayed direction of the heater array and includes a plurality of transistors for driving a plurality of heaters, and a logic circuit which drives the transistor array are arranged on a head substrate. The logic circuit is arranged between the heater array and the transistor array. | 07-09-2009 |
20090195613 | Movable Ink Ejection Structure And Inverse Profile Actuator Arms For Nozzle Arrangement - A nozzle arrangement for an ink jet printhead. The nozzle arrangement comprises a wafer substrate arrangement defining an ink inlet channel and a first wall surrounding the ink inlet channel; a movable ink ejection structure defining an ink ejection port and a second wall surrounding the first wall so that the wafer substrate arrangement and ink ejection structure together define a nozzle chamber in fluid communication with the ink inlet channel and the ink ejection port; and a plurality of thermal bend actuators movably coupling the ink ejection structure to the wafer substrate arrangement. Each actuator comprises an arm for moving the ink ejection structure responsive to an applied electrical signal, whereby a volume of the nozzle chamber is varied. Each arm includes a pair of inner active portions and a pair of outer passive portions, the inner active portions having a profile inverse to that of the outer passive portions. | 08-06-2009 |
20090237457 | Ejection Nozzle With Multiple Bend Actuators - A inkjet nozzle arrangement that has a substrate assembly defining an ink inlet and a static wall surrounding the ink inlet. A roof structure defining a movable wall arranged to telescopically engage said static wall, the roof structure further defining an ink ejection port in fluid communication with said ink inlet. A pair of actuator assemblies is mounted to the substrate assembly and the roof structure for substantially rectilinear movement of the roof structure toward the substrate assembly to eject ink through the ink ejection port. | 09-24-2009 |
20090244189 | NOZZLE ARRANGEMENT HAVING UNIFORM HEATER ELEMENT CONDUCTORS - A nozzle arrangement is provided for ejecting ink. The nozzle arrangement includes a substrate assembly defining an ink inlet passage. A nozzle chamber structure extends from the substrate assembly to define a nozzle chamber in fluid communication with the ink inlet passage. The nozzle chamber structure defines an aperture through which ink in the nozzle chamber can be ejected. A pair of parallel heater elements extends from the nozzle chamber structure and into the nozzle chamber, and can be supplied with current so that ink in the nozzle chamber is ejected out through the aperture. Each heater element includes an elongate conductor, in turn, having at least one arcuate portion. Each elongate conductor is of substantially uniform diameter and terminates in a pair of enlarged contacts at either end. | 10-01-2009 |
20090244190 | NOZZLE ARRANGEMENT HAVING CHAMBER WITH IN COLLECTION WELL - A nozzle arrangement is provided for ejecting ink. The nozzle arrangement includes a substrate assembly defining an ink inlet passage. A nozzle chamber structure extends from the substrate assembly to define a nozzle chamber in fluid communication with the ink inlet passage. The nozzle chamber structure defines an aperture through which ink in the nozzle chamber can be ejected. A pair of parallel heater elements extends from the nozzle chamber structure and into the nozzle chamber, and can be supplied with current so that ink in the nozzle chamber is ejected out through the aperture. The nozzle chamber structure defines a protruding rim bounding the aperture and an endless ink collection well surrounding the aperture. | 10-01-2009 |
20090244191 | NOZZLE ARRANGEMENT HAVING PARTIALLY EMBEDDED HEATER ELEMENTS - A nozzle arrangement is provided for ejecting ink. The nozzle arrangement includes a substrate assembly defining an ink inlet passage. A nozzle chamber structure extends from the substrate assembly to define a nozzle chamber in fluid communication with the ink inlet passage. The nozzle chamber structure defines an aperture through which ink in the nozzle chamber can be ejected. A pair of parallel heater elements extends from the nozzle chamber structure and into the nozzle chamber, and can be supplied with current so that ink in the nozzle chamber is ejected out through the aperture. The heater elements include legs embedded within the nozzle chamber structure and terminate in feet embedded within the substrate assembly. | 10-01-2009 |
20090244192 | DROPLET DISCHARGE DEVICE - A droplet discharge device includes an inkjet head including a nozzle plate having a nozzle, the inkjet head aligned so that a droplet of a function liquid discharged from the nozzle is placed on a surface of a target, a heater applying heat to the function liquid at the inkjet head, and an insulating member having an opening corresponding to the nozzle, the insulating member positioned between the target and the nozzle plate so as to prevent heat transmission from the inkjet head to the target. | 10-01-2009 |
20090262166 | Printhead Having Plural Fluid Ejection Heating Elements - A printhead is provided which has a plurality of fluid chambers defined in a substrate, a plurality of covers which each cover a respective fluid chamber, each cover having a plurality of radially extending supports supporting a rim thereby defining a fluid ejection nozzle, and a plurality of heating elements positioned in each cover between respective pairs of adjacent supports, actuation of the heating elements causing ejection of fluid in the chambers through the nozzle. | 10-22-2009 |
20090267993 | Printhead Integrated Circuit With Petal Formation Ink Ejection Actuator - A printhead integrated circuit comprises an ink chamber for storing a fluid; an ink ejection port in fluid communication with the ink chamber; a plurality of actuators radially positioned about the ink ejection port in a petal formation; and a heater structure provided in each actuator, the heater structure operable to conduct current therethrough to heat a respective actuator, whereby a differential thermal expansion is established in the respective actuator to urge the respective actuator into the ink chamber. The heater structure is positioned in each actuator to heat the actuator unevenly. | 10-29-2009 |
20090278897 | Inkjet Printhead With Nozzle Chambers Each Holding Two Fluids - An inkjet printhead that has an array of droplet ejectors, each having a chamber with a nozzle and an actuator for ejecting drops of ink through the nozzle. During use, each of the chambers hold ink and a gas, the gas remaining in the chamber during activation and deactivation of the actuator. The actuators each have a part with a hydrophilic coating for contacting ink in preference to other parts of the actuator such that the gas and the ink are in direct contact with each other at an interface within the chamber, and at least part of the actuator is positioned at the interface between the ink and the gas. By insulating at least some of the actuator from the printhead substrate, more heat is directed into the ink that is ejected from the nozzle. If the actuator is a thermal or thermal bend, the insulating fluid allows the resistive elements to heat more quickly and use less power. This reduces the overall power consumption of the printhead. | 11-12-2009 |
20090303292 | Printhead Integrated Circuit With Low Loss CMOS Connections To Heaters - A printhead IC with an array of nozzles | 12-10-2009 |
20100026764 | DROPLET DISCHARGE HEAD AND DROPLET DISCHARGING UNIT INCORPORATING THE SAME - A droplet discharge head includes: a liquid reservoir which holds a liquid; a channel through which the liquid is guided to the liquid reservoir; and a driving element which changes the pressure in the liquid reservoir so as to discharge droplets of the liquid contained in the liquid reservoir through a nozzle, in which wall surfaces of the liquid reservoir and of the nozzle are arranged in a continuous line at a side opposite the channel with respect to the center of the nozzle as seen in a cross-sectional view through a central axis of the nozzle. | 02-04-2010 |
20100045747 | Printhead Having Planar Bubble Nucleating Heaters - A printhead is provided having a plurality of bubble forming chambers, ejection nozzles defined in the chambers, and heaters disposed in the chambers for heating bubble forming liquid in the chambers. Each heater has a bubble nucleation section of a smaller cross section than the rest of that heater. The bubble nucleation section is heated faster that the rest of the heater to cause formation of a gas bubble in the liquid and ejection of the bubbled liquid through the corresponding nozzle. The bubble nucleation section is co-planar with the rest of that heater and remains co-planar when the heater is heated. | 02-25-2010 |
20100097429 | INKJET PRINTHEAD WITH TITANIUM ALUMINIUM ALLOY HEATER - An inkjet printhead with a resistive heaters for vaporizing ink to eject drops through respective nozzles. The heater is formed from a TiAlX alloy where Ti contributes more than 40% by weight, Al contributes more than 40% by weight and X contributes less than 5% by weight and comprises zero or more of Ag, Cr, Mo, Nb, Si, Ta and W. | 04-22-2010 |
20100110145 | HEATER STACK AND METHOD FOR MAKING HEATER STACK WITH HEATER ELEMENT DECOUPLED FROM SUBSTRATE - A heater stack includes first strata configured to support and form a fluid heater element responsive to repetitive electrical activation and deactivation to produce cycles of fluid ejection and second strata overlying the first strata to protect the heater element. A decomposed sacrificial layer of a preselected polymer between the substrate and a heater substrata containing the heater element provides a decoupled relationship between them which, during a heat-up period of each cycle, results in the heater element buckling out of physical contact with substrate enabling the heater element to transfer heat energy for producing fluid ejection into the fluid without transferring any into the substrate whereas the decoupled relationship, during the next following cool-down period of each cycle, results in the heater element de-buckling back into physical contact with the substrate enabling the heater element transfer residual heat energy to the substrate. | 05-06-2010 |
20100149273 | INKJET PRINTHEAD INCORPORATING MULTIPLE HEATER ELEMENTS FOR WEIGHTED INK DROP EJECTION - A pagewidth printhead includes a printhead controller; a wafer substrate defining a plurality of inlets; and a plurality of micro-electromechanical nozzle arrangements on the wafer substrate and under control of the controller. Each nozzle arrangement includes side walls disposed on the wafer substrate with a roof portion attached to said side walls to define a printing fluid chamber in fluid communication with one inlet, the roof portion defining an ejection port; and at least two heater elements suspended between the side walls in the fluid chamber for forming a vapour bubble in response to electrical actuation energy being applied thereto, whereby a pressure increase in the chamber is effected and fluid in the fluid chamber ejected therefrom via the ejection port. The controller is configured to actuate the at least two heater elements individually to facilitate ejection of weighted ink drop volumes from the nozzle arrangement. A size of a first of the at least two heater elements is different to a size of a second of the at least two heater elements. | 06-17-2010 |
20100165051 | PRINTHEAD HAVING WIDE HEATER ELEMENTS - A printhead is provided having corresponding nozzles, chambers and heaters. Each heater has a heater element and electrodes connecting current from a power source to the heater elements to heat, and form gas bubbles in, liquid within the chambers which causes ejection of the liquid from the nozzles. Each heater element has a cross section with a lateral dimension at least triple that of the thickness of that heater element and different than a lateral dimension of each other heater element of the corresponding chamber. The thickness of each heater element is less than 0.3 microns. The heater elements and associated electrodes are arranged so that the electrodes are non-coincident with the electrodes of the other heater elements. | 07-01-2010 |
20100188465 | INK JET PRINT HEAD - An object of the present invention is to provide an ink jet print head having plural types of nozzles arranged on the same substrate and through which ink droplets of different sizes are ejected, the ink jet print head exhibiting acceptable ejection performance regardless of the type of the nozzle. Thus, according to the present invention, each of the plural types of nozzles includes a bubbling chamber having an ejection energy generating element allowing an ink droplet to be ejected to a position located opposite an ejection port and an ejection port portion allowing the ejection port and the bubbling chamber to communicate with each other. Ratio of opening area of the ejection port portion at a position where the ejection port portion and the bubbling chamber communicate with each other, to the opening area of the ejection port is higher for the nozzle with a smaller ejection amount. | 07-29-2010 |
20100201749 | Method And Apparatus for Load-Locked Printing - The disclosure relates to a method and apparatus for preventing oxidation or contamination during a circuit printing operation. The circuit printing operation can be directed to OLED-type printing. In an exemplary embodiment, the printing process is conducted at a load-locked printer housing having one or more of chambers. Each chamber is partitioned from the other chambers by physical gates or fluidic curtains. A controller coordinates transportation of a substrate through the system and purges the system by timely opening appropriate gates. The controller may also control the printing operation by energizing the print-head at a time when the substrate is positioned substantially thereunder. | 08-12-2010 |
20100208002 | INKJET NOZZLE ARRANGEMENT INCORPORATING THERMAL DIFFERENTIAL ACTUATOR - A nozzle arrangement for an inkjet printhead includes a wafer substrate defining an inlet channel; a nozzle chamber wall and a roof wall positioned on the wafer substrate to define a nozzle chamber in fluid communication with the inlet channel, the roof wall defining an ink ejection port in fluid communication with the nozzle chamber; a paddle positioned in the nozzle chamber and reciprocally displaceable to eject ink from the ejection port; and an actuating arm extending through the nozzle chamber wall and connected to the paddle, the actuating arm comprising an actuating portion having a pair of actuating members, one of the actuating members including a heating circuit. On receipt of an electrical signal to the exclusion of the other actuating member, the actuating arm is displaced in a first direction. The actuating arm is comprised of a resiliently flexible material, whereby on cessation of the electrical signal, the actuating arm is displaced in a second direction opposite to the first direction. | 08-19-2010 |
20100220152 | METHOD OF MANUFACTURING LIQUID EJECTION HEAD, METHOD OF MANUFACTURING RECORDING APPARATUS INCLUDING THE SAME, LIQUID EJECTION HEAD, AND RECORDING APPARATUS - A method of manufacturing a liquid ejection head having a plurality of passage modules that have individual passages, actuator modules that include a plurality of actuators and a drive unit and the liquid ejection head produced by the method. The method comprising ranking the actuator modules according to a magnitude of a capacitance of the actuators, classifying the passage modules into a terminal region group and a central region group, fixing the actuator modules to the passage modules so that the actuator modules that having a capacitance not less than a predetermined capacitance correspond to the passage modules in the terminal group and so that the actuator modules having a capacitance less than the predetermined capacitance in the actuator module ranking correspond to the passage modules in the central region group. | 09-02-2010 |
20100220153 | PRINTHEAD HAVING ANNULAR SHAPED NOZZLE HEATERS - A printhead is provided having a plurality of fluid ejection nozzles. Each nozzle has a chamber on a printing surface having an ejection port, and an annular shaped heater for heating fluid in the chamber to cause ejection from the ejection port. | 09-02-2010 |
20100225707 | AQUEOUS INK, INK JET RECORDING METHOD, INK CARTRIDGE, RECORDING UNIT, AND INK JET RECORDING APPARATUS - An aqueous ink contains at least an aqueous medium, a surfactant, and a dye. The aqueous medium includes only water and at least one water-soluble organic compound(s) and the static surface tension of the aqueous medium is from 45 mN/m or more to 57 mN/m or less. The dynamic surface tension of the aqueous ink satisfies the following conditions: (1) The dynamic surface tension of the aqueous ink at a lifetime of 50 milliseconds is from 42 mN/m or more to less than 49 mN/m; (2) The dynamic surface tension of the aqueous ink at a lifetime of 500 milliseconds is from 28 mN/m or more to 38 mN/m or less; and (3) A difference between the dynamic surface tension of the aqueous ink at a lifetime of 50 milliseconds and the dynamic surface tension of the aqueous ink at a lifetime of 500 milliseconds is 7 mN/m or more. | 09-09-2010 |
20100253747 | THERMAL INKJET PRINTHEAD INTERGRATED CIRCUIT WITH LOW RESISTIVE LOSS ELECTRODE CONNECTION - A thermal inkjet printhead integrated circuit has an array of ink chambers formed on a wafer substrate, each having a nozzle aperture and a thermal actuator. The thermal actuator has a heater element extending between two contacts. The printhead IC also has CMOS (complementary metal-oxide semiconductor) drive circuitry formed by a plurality of flat, metal layers interleaved with interlayer dielectric for selectively providing the thermal actuators of the array with drive signals. The CMOS drive circuitry has a top-most metal layer providing electrodes for each of the thermal actuators respectively. The electrodes each have a flat surface that the contacts of each of the thermal actuators overlie for face to face contacting engagement. The contacts and the heater element are coplanar such that the thermal actuator is an integral planar structure. Each of the chambers has an opening for refill ink, and the thermal actuator is positioned such that during use the refill ink flows over one of the contacts to enter the chamber. | 10-07-2010 |
20100271436 | PRINTHEAD WITH LIQUID FLOW THROUGH DEVICE - A liquid drop ejector is disclosed including a nozzle structure and a thermal actuator. The nozzle structure includes a nozzle and a wall. The nozzle includes an end and the wall extends from the end of the nozzle. The thermal actuator is associated with at least one of the nozzle and the wall, and is operable to add surface energy to at least one of the nozzle and the wall to cause a directional change in a liquid flowing through the nozzle structure. | 10-28-2010 |
20100277549 | NOZZLE ARRANGEMENT FOR INKJET PRINTER WITH INK WICKING REDUCTION - A nozzle arrangement for an inkjet printer includes a wafer substrate defining a supply channel; chamber side and roof walls positioned on the substrate, said walls defining a nozzle chamber operatively supplied with ink via the supply channel, the roof wall having a nozzle rim defined thereon; a thermal bend actuator attached to said substrate via a post, the actuator passing through a slot defined in a wall of the chamber, the actuator ending in an ejection paddle inside the chamber, said actuator configured to eject ink from the nozzle chamber; a poker extending from the paddle towards the nozzle rim such that an ink meniscus is formed between the rim and the poker; and an actuator slot protection barrier mounted on the actuator proximate the slot and configured to reduce ink wicking on the nozzle rim during ejection of ink from the nozzle rim. The actuator includes a conductive heater portion which is normally balanced with a corresponding layer in thermal equilibrium. | 11-04-2010 |
20100277550 | PRINTHEAD HAVING HEATER AND NON-HEATER ELEMENTS - A printhead is provided having a plurality of nozzles, a plurality of heater elements, and a plurality of non-heater elements formed of the same heater material as the heater elements. Each heater element is disposed in a corresponding one of the nozzles and is connected to corresponding electrodes so as to heat fluid within the nozzle thereby forming a gas bubble in the fluid which causes ejection of fluid through the a port in the corresponding nozzle. Each non-heater element is disposed in a corresponding one of the nozzles. | 11-04-2010 |
20100289855 | INKJET NOZZLE ASSEMBLY WITH MOVING NOZZLE OPENING DEFINED IN ROOF OF NOZZLE CHAMBER - An inkjet nozzle assembly includes a nozzle chamber comprising a floor and a roof. The roof has a moving portion which is moveable relative to the floor. A thermal bend actuator is configured for actuating the moving portion. The thermal bend actuator includes an active beam for connection to drive circuitry and a passive beam mechanically cooperating with the active beam. When a current is passed through the active beam, the active beam expands relative to the passive beam resulting in bending of the moving portion towards the floor of the nozzle chamber. The nozzle opening is defined in the moving portion of the roof, such that the nozzle opening is moveable relative to the floor. | 11-18-2010 |
20100295902 | NOZZLE ARRANGEMENT FOR INKJET PRINTHEAD INCORPORATING A PROTECTIVE STRUCTURE - A nozzle arrangement for an inkjet printhead, the nozzle arrangement includes a substrate defining a nozzle chamber bounded by walls and a roof, the roof defining an ink ejection port; an ink-ejecting member positioned in the nozzle chamber, the ink-ejecting member displaceable towards the ink ejection port to eject ink from the ink ejection port; a work-transmitting structure displaceable with respect to the substrate, the work-transmitting structure connected to the ink-ejecting member; an actuator connected to the work-transmitting structure, the actuator for displacing the work transmitting structure upon receipt of an electrical drive signal; and a covering formation defining an air chamber. The actuator is positioned within the air chamber. The roof, the work transmitting structure and the covering formation together defining a protective structure for the nozzle arrangement. | 11-25-2010 |
20100309260 | INKJET RECORDING INK, INK CARTRIDGE, INKJET PRINTING APPARATUS AND IMAGE FORMING METHOD - An inkjet recording ink including a carbon black, a dispersant, a polyurethane resin particle, and water, where the carbon black is a channel black, a gas black, or a mixture of channel black and a gas black, and the polyurethane resin particle is an anionic self-emulsifying ether-based polyurethane resin particle, wherein the anionic self-emulsifying ether-based polyurethane resin particle has an acid value of 40 to 120 and a mass average molecular weight of 500 to 50,000, and an average primary particle diameter of 20 nm or less. | 12-09-2010 |
20110057993 | LIQUID COMPOSITION, SET, LIQUID CARTRIDGE, INKJET RECORDING METHOD, AND INKJET RECORDING APPARATUS - A liquid composition used in combination with an ink containing a coloring material is ejected by the action of thermal energy from a recording head including a heating resistor having a protecting layer that contains at least one of a metal and a metal oxide and that is to come into contact with the liquid composition. The liquid composition contains an organic acid having a carboxy group, an alkali metal ion, an organic acid having a sulfonate group, a polyvalent metal ion, and water. | 03-10-2011 |
20110057994 | LIQUID COMPOSITION, SET, LIQUID CARTRIDGE, INKJET RECORDING METHOD, AND INKJET RECORDING APPARATUS - A liquid composition used in combination with an ink containing a coloring material is ejected by the action of thermal energy from a recording head including a heating resistor having a protecting layer that is to come into contact with the liquid composition and that contains at least one of a metal and a metal oxide. The liquid composition contains at least either an organic compound having a carboxy group and an amino group or an amine oxide compound, an organic acid having a carboxy group, and water. | 03-10-2011 |
20110063370 | METHOD OF EJECTING SOLVENT-BASED INK COMPOSITION COMPRISING PYRROLIDINONE SOLVENT - A method of ejecting ink from a thermal inkjet printhead. The method comprises the steps of: (i) supplying an ink to at least one nozzle chamber of the printhead; and (ii) actuating a heater element in the nozzle chamber and heating the ink to a temperature sufficient to form a bubble therein, thereby causing the ink to be ejected from a nozzle opening associated with the nozzle chamber. The ink is a solvent-based ink composition comprising:
| 03-17-2011 |
20110063371 | METHOD OF EJECTING SOLVENT-BASED INK COMPOSITION COMPRISING KETONE SOLVENT - A method of ejecting ink from a thermal inkjet printhead. The method comprises the steps of: (i) supplying an ink to at least one nozzle chamber of the printhead; and (ii) actuating a heater element in the nozzle chamber and heating the ink to a temperature sufficient to form a bubble therein, thereby causing the ink to be ejected from a nozzle opening associated with the nozzle chamber. The ink is a solvent-based ink composition comprising:
| 03-17-2011 |
20110063372 | METHOD OF EJECTING SOLVENT-BASED INK COMPOSITION COMPRISING ACETATE SOLVENT - A method of ejecting ink from a thermal inkjet printhead. The method comprises the steps of: (i) supplying an ink to at least one nozzle chamber of the printhead; and (ii) actuating a heater element in the nozzle chamber and heating the ink to a temperature sufficient to form a bubble therein, thereby causing the ink to be ejected from a nozzle opening associated with the nozzle chamber. The ink is a solvent-based ink composition comprising: | 03-17-2011 |
20110063373 | METHOD OF EJECTING SOLVENT-BASED INK COMPOSITION COMPRISING ETHER SOLVENT - A method of ejecting ink from a thermal inkjet printhead. The method comprises the steps of: (i) supplying an ink to at least one nozzle chamber of the printhead; and (ii) actuating a heater element in the nozzle chamber and heating the ink to a temperature sufficient to form a bubble therein, thereby causing the ink to be ejected from a nozzle opening associated with the nozzle chamber. The ink is a solvent-based ink composition comprising:
| 03-17-2011 |
20110063374 | Method for Achieving Uniform Media Temperature and Size throughout the Pre-Heat Zone - An imaging device includes a source of a substantially continuous web of media, and a web transport system configured to transport the continuous web from the source along a web path having a print zone. At least one printhead arranged along the web path in the print zone and configured to deposit ink onto the web to form images. A preheating system is positioned along the web path between the source and the print zone. The preheating system includes a first heating stage and a second heating stage. The first heating stage has at least one heater configured to heat the web to an initial preheat temperature prior to reaching the second stage. The second stage includes at least one heater configured to reduce a temperature of the web from the initial preheat temperature to a target temperature for the preheating system. | 03-17-2011 |
20110069122 | INK FOR INKJET RECORDING AND IMAGE FORMING METHOD - There is provided is an ink for inkjet recording, comprising:
| 03-24-2011 |
20110080453 | LIQUID EJECTION HEAD AND IMAGE FORMING APPARATUS - The liquid ejection head comprises: a nozzle from which liquid is ejected; a pressure chamber which accommodates the liquid to be ejected from the nozzle; a pressurizing device which deforms to pressurize the liquid in the pressure chamber to eject the liquid from the nozzle; and a nozzle flow channel through which the pressurized liquid flows from the pressure chamber to the nozzle, the nozzle flow channel having at least a portion in which forces acting toward an axis of the nozzle flow channel onto the liquid flowing inside the nozzle flow channel are not uniform within a cross-section perpendicular to the axis. | 04-07-2011 |
20110115853 | BUBBLE PURGING SYSTEM FOR A FLUID EJECTION HEAD - A method and system for purging bubbles from a fluid ejection head comprising a plurality of fluid flow channels including a first plurality of fluid flow channels flowing a first ink to a first actuator device and a second plurality of fluid flow channels for flowing a second ink to a second actuator device. During a bubble purging operation the first and second actuator devices are pulsed with different energies that depend on the viscosity of the first ink and the second ink. Heating the inks with different energies, results in the viscosity of the first ink to be same as the viscosity of the second ink. In one embodiment, a test pattern that includes a plurality of dots is printed to determine a clogged fluid ejection nozzle. Based on the determination, an actuator device corresponding to the clogged fluid ejection nozzle is pulsed. | 05-19-2011 |
20110115854 | Inkjet Printhead With Graded Die Carrier - An inkjet printhead includes a die having a heating element formed thereon. The inkjet printhead also includes a graded die carrier. The graded die carrier is coupled to the die. The graded die carrier has lands that are separated by an ink slot. Each of the lands is graded such that its proximity to the die varies. | 05-19-2011 |
20110122201 | PRINTHEAD HAVING RELATIVELY DIMENSIONED EJECTION PORTS AND ARMS - A printhead is provided having chambers for fluid, ejection ports defined in the chambers, and ejection arms positioned in the chambers, each arm having a displacement area which is displaced against fluid in the respective chamber to eject the fluid from the respective ejection port. Each displacement area is greater than half an area of the respective ejection port and less than twice the area of that ejection port. | 05-26-2011 |
20110128326 | PRINTHEAD HAVING DUAL ARM EJECTION ACTUATORS - A printhead is provided which has a plurality of fluid chambers and nozzles for ejection of fluid from the chambers defined on a substrate having electrical circuitry. Each chamber has an actuator cantilevered on the substrate with a first arm connected to the electrical circuitry and a second arm connected at each end to the first arm. Electrical current from the electrical circuitry causing heating and expansion of the first arm relative to the second arm thereby deflecting the actuator relative to the substrate. Each actuator has an ejection member connected to the free end and positioned within the chamber so that the deflection of the actuator causes displacement of the ejection member resulting in ejection of fluid from the chamber through the nozzle. | 06-02-2011 |
20110148989 | INK EJECTION DEVICE EMPLOYING CORRUGATED THERMAL ACTUATOR - An ink ejection device for ejecting ink from a nozzle chamber includes an anchor block extending from a supporting substrate, the anchor block including a heating circuit; a first group of elongate corrugated arms attached at a first end thereof to the heating circuit, the first group of elongate corrugated arms being in a first horizontal plane; a second group of elongate corrugated arms attached at a first end to the anchor block and electrically insulated from the heating circuit, the second group of elongate corrugated arms being in a second horizontal plane different from the first horizontal plane; a cross arm joining the first group of at least two elongate corrugated arms and the second group of at least two elongate corrugated arms at a second end of the corrugated arms; and a paddle attached to the cross arm. A first edge of the elongate corrugated arms of the first group and a first edge of the elongate corrugated arms of the second group are in a common horizontal plane between the first and second horizontal planes. | 06-23-2011 |
20110164092 | LIQUID DISCHARGE METHOD, LIQUID DISCHARGE HEAD AND LIQUID DISCHARGE APPARATUS - A liquid discharge head is arranged in a manner that in the cross section of a discharge port in a liquid discharge direction, the discharge port includes: at least one projection that is convex inside the discharge port; a first area, for holding a liquid surface connecting a pillar-shaped liquid that is elongated outside the discharge port; and second areas where a fluid resistance is lower than that in the first area so as to pull the liquid in the discharge port in a direction opposite to the liquid discharge direction; and the first area is formed in the direction in which the projection is convex, and the second areas are formed on both sides of the projection. | 07-07-2011 |
20110211023 | PRINTHEAD EJECTION NOZZLE - A printhead ejection nozzle is provided having a substrate defining a supply passage for ejection fluid, a chamber in fluid communication with the supply passage and an ejection port, an ejection member disposed between the supply passage and the ejection port, and a heater element coupled to the ejection member for causing ejection of the ejection fluid supplied via the supply passage from the ejection port. | 09-01-2011 |
20110228008 | PRINTHEAD HAVING RELATIVELY SIZED FLUID DUCTS AND NOZZLES - A printhead is provided having a substrate having a droplet ejection side and a liquid supply side opposite the droplet ejection side, at least one nozzle formed on the droplet ejection side of the substrate having a drop ejection actuator and an associated drop ejection aperture for ejecting drops of liquid, ducting extending from the liquid supply side into the substrate and terminating before reaching the droplet ejection side, and at least one liquid inlet for establishing fluid communication between the ducting and the nozzle. The ducting has a smaller cross section transverse to flow direction than that of the drop ejection aperture of the nozzle. | 09-22-2011 |
20110228009 | PRINTHEAD NOZZLE ARRANGEMENT EMPLOYING VARIABLE VOLUME NOZZLE CHAMBER - A printhead has a plurality of nozzle arrangements. Each nozzle arrangement includes an ink inlet aperture for receiving ink into the nozzle arrangmenet; a wall portion bounding the ink inlet aperture; a crown portion arranged opposite the ink inlet aperture and defining a nozzle opening; a skirt portion depending from the crown portion to form part of a peripheral wall of the nozzle arrangement, the crown and skirt portions being displaceable with respect to the wall portion towards the substrate to alter a volume of a nozzle chamber defined by the wall, crown and skirt portions; and a thermal actuator interconnecting the crown portion with the substrate, the actuator for displacing the crown and skirt portions. The wall portion is angled inwardly with respect to the nozzle chamber defined by the wall, crown, and skirt portions. The wall portion defines a lip at a to free end thereof, the lip for facilitating the formation of a fluidic seal with the skirt portion. | 09-22-2011 |
20110310182 | PRINTHEAD AND METHOD OF FABRICATING THE SAME - Disclosed is a printhead having at least one ink drop generator region, which includes an ink chamber, an orifice through which ink drops are ejected, and a heating element positioned below the ink chamber. The heating element includes a resistor defined therein and a nano-structured surface that is exposed to the ink fluid supplied to the ink chamber. The nano-structured surface takes the form of an array of nano-pillars. The printhead is fabricated by a method that includes: forming a heating element having an oxidizable metal layer as the uppermost layer; forming an aluminum-containing layer on the oxidizable metal layer; anodizing the aluminum-containing layer to form porous alumina; anodizing the oxidizable metal layer so as to partially fill the pores in the porous alumina with metal oxide material; and removing the porous alumina by selective etching to produce a nano-structured surface. | 12-22-2011 |
20120013684 | Thermal ink jet ink compostion - A solvent-based ink composition for a thermal inkjet printhead includes (a) 55-90 wt. % of an organic solvent including a ketone and a C | 01-19-2012 |
20120105551 | NOZZLE ARRANGEMENT INCLUDING ACTIVE AND STATIC INK EJECTING MEMBERS DEFINING VARIABLE-VOLUME CHAMBER - A nozzle arrangement for an inkjet printhead includes an ink inlet; a static ink ejecting member bounding the ink inlet; an active ink ejecting member having a roof defining an ink ejection port and sidewalls depending from the roof, the active ink ejecting member and the static ink ejecting member together defining a nozzle chamber; and an actuator arrangement for reciprocating the active ink ejection member relative to the static ink ejecting member. The static ink ejecting member includes a sealing structure defined along an edge thereof, the sealing structure shaped to form a fluidic seal between the active and the static ink ejecting members by surface tension of a fluid in the nozzle chamber. | 05-03-2012 |
20120113193 | INKJET RECORDING METHOD, INKJET RECORDING APPARATUS, AND INK FOR INKJET RECORDING - An inkjet recording method includes recording by ejecting liquid droplets of an ink onto a recording medium from an ejection head that ejects, by heat, the liquid droplets of the ink at an ejection amount with respect to one droplet of from 1 ng to 2 ng to thereby attach the liquid droplets of the ink to the recording medium, wherein the ink comprises a pigment having a volume average particle diameter of from 100 nm to 400 nm and has a dynamic contact angle of from 30° to 60°, 50 seconds after dropwise addition of 3 μl of the ink to plain paper. | 05-10-2012 |
20120127240 | SOLVENT-BASED INK COMPOSITION WITH KETONE SOLVENT AND SURFACE-MODIFIED PIGMENT - A solvent-based ink composition for a thermal inkjet printhead. The composition includes: (a) 10-80 wt. % of a compound of formula (B): | 05-24-2012 |
20120182355 | DIE ATTACH COMPOSITION FOR SILICON CHIP PLACEMENT ON A FLAT SUBSTRATE HAVING IMPROVED THIXOTROPIC PROPERTIES - A die attach composition is used for bonding a silicon chip on a flat substrate. The die attach composition includes a cross-linkable epoxy resin having a rigid backbone, an epoxy siloxane resin, a fumed silica filler, an amine curing agent, and a silane coupling agent. The die attach composition is particularly useful in bonding silicon heater chips on flat ceramic substrate in forming an inkjet printhead assembly. The die attach composition allows accurate placement of silicon heater chips on flat ceramic substrate and exhibits good ink resistance. | 07-19-2012 |
20120229575 | INK FOR INK JET RECORDING - An ink for ink jet recording, the ink being used in an ink jet recording method that includes ejecting an ink from a recording head by the action of thermal energy, includes water, a self-dispersing pigment, and polymer particles, in which the polymer particles have a glass transition temperature of 25 degrees (Celsius) or lower, an average particle size of 80 nm to 220 nm, and an acid value of 25 mgKOH/g to 150 mgKOH/g. | 09-13-2012 |
20120236078 | INK JET PRINTING INK - An ink jet printing ink for use in an ink jet printing method. The ink is ejected from a print head by the action of thermal energy and includes water, a self-dispersing pigment, and at least two types of resin particles. One of the at least two types of resin particles (resin particle A) and another of the at least two types of resin particles (resin particle B) have an average particle size of 80 nm or more but 220 nm or less and an acid value of 25 mgKOH/g or more but 150 mgKOH/g or less. The resin particle A has a glass transition temperature of 25 degrees Celsius or less. The resin particle B has a glass transition temperature of 25 degrees Celsius or more. A difference in glass transition temperature between the resin particle A and the resin particle B is 10 degrees Celsius or more. | 09-20-2012 |
20120262520 | Phase-Change Ink Jetting - Among other things, ink is jetted onto a substrate, the ink includes (a) a pigment and (b) a wax, and the jetted ink on the substrate is heated to fire the pigment on the substrate. | 10-18-2012 |
20120262521 | INKJET PRINTING HEAD SUBSTRATE, INKJET PRINTING HEAD AND INKJET PRINTING APPARATUS - Second etching is performed to the bottom through dry etching of a substrate to suppress image degradation even if an opening position of an ejection opening at a substrate end deviates. Provided is an inkjet printing head substrate including: a first surface, a second surface, and a plurality of ink supply openings, wherein the plurality of the heat resistive elements and the plurality of the ink supply openings are arranged in such a manner that each of distances between a heat resistive element closer to an inclined surface of the recessed portion in the inkjet printing head substrate among the plurality of the heat resistive elements and two ink supply openings adjacent to the heat resistive element is longer than each of distances between a heat resistive element closer to the center of the inkjet printing head substrate and two ink supply openings adjacent to the heat resistive element. | 10-18-2012 |
20120268532 | INK, INK CARTRIDGE, AND INK JET RECORDING METHOD - Provided is an ink jet ink including a monoazo pigment and a resin, the ink being used for an ink jet recording system in which the ink is ejected from a recording head by an action of thermal energy. The monoazo pigment is a self-dispersible pigment having an anionic group bonded to a particle surface of the pigment directly or via another atomic group and has a surface charge amount of 5.9×10 | 10-25-2012 |
20120287205 | INK JET PRINT HEAD AND METHOD OF MANUFACTURING THE SAME - A method of manufacturing an ink jet print head capable of bonding the printing element substrate to the support surface with high precision in a reduced period of time is provided. For this purpose, raised flat portions are formed in the support surface of the supporting member to provide in an adhesive layer between the printing element substrate and the supporting member a portion of the thermosetting adhesive that is thinner than others. After the relative positions of the printing element substrate and the supporting member are adjusted, the thin portions of the adhesive layer are hardened. This enables the printing element substrate to be bonded to the supporting member in a relatively short period of time. As a result, if there are undulations on the support surface, the printing element substrate can be bonded to the supporting member with high precision, improving the mass productivity of the print head. | 11-15-2012 |
20130027476 | INK, INK CARTRIDGE AND INK JET RECORDING METHOD - The invention provides an ink that inhibits lowering of ejection stability caused by a precipitate derived from a self-dispersible type monoazo pigment and also inhibits deterioration of a liquid contact surface of a heater portion of a recording head. The ink is an ink for ink jet recording system employing an thermal energy, containing a monoazo pigment, a resin and a surfactant represented by the following formula (1). A proportion of a molecular weight of an ethylene oxide group moiety occupying the surfactant is 10% or more and 85% or less, the monoazo pigment is a self-dispersible pigment to the particle surface of which at least one hydrophilic group selected from the group consisting of —COOM, —SO | 01-31-2013 |
20130050347 | FLUID EJECTION DEVICE AND METHODS OF FABRICATION - In an embodiment, a fluid ejection device includes a die including a fluid feed slot that extends from a back side to a front side of the die, a firing chamber formed on the front side to receive fluid from the feed slot, a fluid distribution manifold adhered to the back side to provide fluid to the feed slot, and a corrosion-resistant layer coating the back side of the die so as not to extend into the feed slot. | 02-28-2013 |
20130257994 | FUNCTIONAL LIQUID DEPOSITION USING CONTINUOUS LIQUID - A liquid dispenser includes a first liquid supply that provides a carrier liquid under pressure that flows from the first liquid supply through a first liquid supply channel through a liquid dispensing channel through a liquid return channel and back to the first liquid supply continuously during a drop dispensing operation. A second liquid supply provides a functional liquid to the liquid dispensing channel through a second liquid supply channel. A drop formation device, associated with an interface of the second liquid supply channel and the liquid dispensing channel, is selectively actuated to form a discrete drop of the functional liquid in the carrier liquid flowing through the liquid dispensing channel. The functional liquid is immiscible in the carrier liquid. A drop ejection device is selectively actuated to divert the discrete drop of the functional liquid and a portion of the carrier liquid flowing through the liquid dispensing channel toward the outlet opening of the liquid dispensing channel. | 10-03-2013 |
20130257995 | METHOD FOR DRIVING LIQUID DISCHARGE HEAD, LIQUID DISCHARGE HEAD, AND LIQUID DISCHARGE APPARATUS - A liquid discharge apparatus includes: a liquid discharge head which includes; a discharge port to discharge a liquid; and a substrate including: an energy generating element for generating thermal energy to discharge the liquid from the liquid discharge port; a pair of electrodes connected to the energy generating element for driving thereof; an insulating layer of an insulating material provided to cover the energy generating element; and a metal layer of a metal material provided corresponding to the energy generating element to cover the insulating layer; and a driver unit which sets a first potential of one of the pair of electrodes substantially equal to the potential of the liquid and a second potential of the other one of the pair of electrodes lower than the first potential to drive the energy generating element. | 10-03-2013 |
20130300803 | INK, INK CARTRIDGE AND INK JET RECORDING METHOD - The invention provides an ink containing a self-dispersion pigment in which a phosphonic acid group is bonded directly or through another atomic group to the surface thereof and a polyurethane polymer, wherein the surface charge amount of the self-dispersion pigment is 0.25 mmol/g or more and 0.42 mmol/g or less, and the polyurethane polymer has units respectively derived from a polyisocyanate, a polyether polyol having no acid group and a diol having an acid group. | 11-14-2013 |
20130300804 | INK, INK CARTRIDGE AND INK JET RECORDING METHOD - The invention provides an ink containing a polyurethane polymer which has units respectively derived from a polyisocyanate, a polyether polyol having no acid group and a diol having an acid group and has an acid value of 40 mg KOH/g or more and 140 mg KOH/g or less, a carbon black and at least one antioxidant selected from compounds represented by the general formulae (1) to (3). | 11-14-2013 |
20130300805 | INK, INK CARTRIDGE, AND INKJET RECORDING METHOD - An ink used for an inkjet recording method for discharging the ink from a recording head by an action of thermal energy contains self-dispersing carbon black, a polyurethane polymer having an acid value of 40 mg KOH/g or more, and an acryl polymer having an acid value of 100 mg KOH/g or more and 200 mg KOH/g or less. | 11-14-2013 |
20130328973 | INK, INK CARTRIDGE AND INK JET RECORDING PROCESS - The invention provides an ink for use in an ink jet recording process in which an ink is ejected from a recording head by the action of thermal energy, comprising a pigment, a water-soluble polyurethane polymer, a compound represented by a general formula (1) having a weight-average molecular weight of 1,000 or more and 8,500 or less, and a polyethylene oxide alkyl ether the alkyl group of which has 12 or more carbon atoms, wherein based on the total mass of the ink the content (mass %) of the compound represented by the general formula (1) is 0.4 times or more and 10.0 times or less in terms of mass ratio with respect to the content (mass %) of the polyethylene oxide alkyl ether. | 12-12-2013 |
20140022310 | CORRUGATED MEMBRANE MEMS ACTUATOR - A liquid dispenser includes a first liquid chamber and a second liquid chamber. The first liquid chamber includes a nozzle. A heater is associated with the second liquid chamber. A flexible corrugated membrane is positioned to separate and fluidically seal the first liquid chamber and the second liquid chamber from each other. | 01-23-2014 |
20140022311 | THERMAL BUBBLE JETTING MECHANISM, METHOD OF JETTING AND METHOD OF MAKING THE MECHANISM - A thermal bubble jetting device including a substrate. A superoleophobic, textured surface is positioned on the substrate. The textured surface comprises one or more gaps configured for holding a gas. A receptacle is positioned in fluid communication with the textured surface. Both an inlet and nozzle are in fluid communication with the receptacle. The device includes a heater mechanism configured to expand a gas in the one or more gaps so as to sufficiently increase pressure in the receptacle to force liquid through the nozzle. | 01-23-2014 |
20140022312 | Inkjet nozzle assembly with elliptical nozzle aperture and offset beam heater element - An inkjet nozzle assembly includes: a nozzle chamber having a planar roof spaced apart from a floor, the roof having a nozzle aperture defined therein; and a heater element disposed in the nozzle chamber, the heater element being configured as a planar beam extending longitudinally and parallel with a plane of the roof. The nozzle aperture is elliptical having a centroid, a major axis and a minor axis, the major axis of the nozzle aperture is parallel with a longitudinal axis of the beam, the centroid of the nozzle aperture is offset from a longitudinal centroid of the planar beam, and the minor axis of the nozzle aperture overlaps with a whole width of the beam. | 01-23-2014 |
20140036002 | METHOD OF PRINTING WITH HIGH SOLIDS CONTENT INK - A printing method includes supplying pigmented ink to inkjet printhead having array of dual feed thermal inkjet ejectors, wherein pigmented ink includes an aqueous carrier with pigment particle loading of at least 4 percent by weight and polymer loading of at least 1 percent by weight; ejecting a plurality of maintenance drops of pigmented ink from array of dual feed thermal inkjet ejectors prior to start of printing the image on recording medium; printing the image swath by swath by ejecting printing drops of pigmented ink on recording medium, wherein a plurality of printing swaths are required in order to complete printing of the image; and ejecting a plurality of maintenance drops of pigmented ink from array of dual feed thermal inkjet ejectors after a completion of printing the image on recording medium, wherein no maintenance drops are ejected between the start and the completion of printing of the image. | 02-06-2014 |
20140063127 | INKJET INK COMPOSITION AND METHOD FOR PRODUCING THE SAME, INKJET RECORDING METHOD, PIGMENT DISPERSION FOR INKJET INK AND METHOD FOR PRODUCING THE SAME - An inkjet ink composition includes (component A) C.I. Pigment Yellow 180, (component B) a fatty acid amide compound, and (component C) a high molecular weight dispersant. The method of producing an inkjet ink composition includes preliminary mixing (component A) C.I. Pigment Yellow 180 and (component B) a fatty acid amide compound to obtain a mixture, and mixing the mixture and (component C) a high molecular weight dispersant. | 03-06-2014 |
20140063128 | LIQUID DISCHARGE HEAD - A liquid discharge head includes a first unit configured to supply power, and a second unit including an input unit to which the power is input, a plurality of heaters connected to the input unit via a common power source line and configured to discharge liquid, an energization unit configured to energize the plurality of heaters, and a selection unit configured to select a target heater from the heaters for discharging liquid to be energized in turn by the energization unit for a period corresponding to a time interval at which liquid is discharged, wherein the selection unit further selects non-target heaters from the heaters to be energized different from the heater targeted for use for discharging liquid before and after the target heater is energized. | 03-06-2014 |
20140078223 | PRINTHEAD SUBSTRATE AND PRINTING APPARATUS - A printhead substrate, comprising an electrothermal transducer configured to heat a printing material, a first DMOS transistor configured to drive the electrothermal transducer, a MOS structure forming an anti-fuse element, a second DMOS transistor configured to write information in the anti-fuse element by causing an insulation breakdown of an insulating film of the MOS structure, and a driving unit consisted of at least one MOS transistor and configured to drive the second DMOS transistor. | 03-20-2014 |
20140139591 | INK COMPOSITIONS INCORPORATING ESTER RESINS - An ink composition including one or more ester resins, the ink composition containing an optional colorant; at least one crystalline phase-change agent; an amorphous binder agent; and optionally one or more additives; where the at least one amorphous binder agent includes at least one ester compound. | 05-22-2014 |
20140184701 | LIQUID DISCHARGING HEAD - A liquid discharging head is configured including an element substrate and a flow path forming substrate which are joined. The element substrate includes a plurality of energy generating elements (electrothermal conversion elements) configured to generate thermal energy, and a supply port configured to supply liquid. The flow path forming substrate includes a plurality of discharging ports, a bubble generating chamber formed so as to include an energy generating element, and a supply path which connects the bubble generating chamber and the supply port. The upstream side of the discharging port in the direction of liquid flowing from the supply path to the bubble generating chamber, as viewed from a planar view, is formed in a semicircular shape, and the downstream side is formed in a semi-polygonal shape. | 07-03-2014 |
20140267502 | LIQUID EJECTION HEAD, RECORDING APPARATUS, PROCESS FOR PRODUCING LIQUID EJECTION HEAD, SUBSTRATE FOR LIQUID EJECTION HEAD AND PROCESS FOR PRODUCING SUBSTRATE FOR LIQUID EJECTION HEAD - The invention provides a liquid ejection head including a member in which an ejection orifice for ejecting a liquid is formed, and a substrate to which the member is joined. The substrate has a heat storage layer containing a silicon compound and an energy-generating element provided at a position corresponding to the ejection orifice for generating heat by electrification to eject the liquid from the ejection orifice. The energy-generating element has a laminate having a metal layer formed of tantalum or tungsten, an Si layer laminated on the metal layer and formed of silicon and an N layer laminated on the Si layer and formed of nitrogen, and the metal layer is in contact with the heat storage layer. | 09-18-2014 |
20140292940 | Process for Preparing a Dispersion, Dispersion, Use and Method - A process for preparing a dispersion comprising the stages: i) providing a dispersion comprising a particulate solid, a liquid medium and a dispersant having cross-linkable groups and a weight averaged molecular weight of from 1,000 to 70,000; and ii) cross-linking the dispersant in the presence of the particulate solid and the liquid medium thereby preparing a dispersion of an encapsulated particulate solid, wherein the cross-linking is performed such that 0.01 to 0.5 mmoles of cross-linkable groups in the dispersant are cross-linked per g of dispersant; said process also comprising at any stage: iii) adding a metal chelating agent to the dispersion; and after stage iii) the stage of: iv) removing at least some of the metal chelating agent from the dispersion. | 10-02-2014 |
20140354735 | METHOD OF MAKING INKJET PRINT HEADS HAVING INKJET CHAMBERS AND ORIFICES FORMED IN A WAFER AND RELATED DEVICES - A method of making inkjet print heads may include forming recesses in a first surface of a first wafer to define inkjet chambers. The method may also include forming openings extending from a second surface of the first wafer through to respective ones of the inkjet chambers to define inkjet orifices. The method may further include forming a second wafer including ink heaters, and joining the first and second wafers together so that the ink heaters are aligned within respective inkjet chambers to thereby define the inkjet print heads. | 12-04-2014 |
20140354736 | METHOD OF MAKING INKJET PRINT HEADS BY FILLING RESIDUAL SLOTTED RECESSES AND RELATED DEVICES - A method of making an inkjet print head may include forming, by sawing with a rotary saw blade, continuous slotted recesses in a first surface of a wafer. The continuous slotted recesses may be arranged in parallel, spaced apart relation, and each continuous slotted recess may extend continuously across the first surface. The method may further include forming discontinuous slotted recesses in a second surface of the wafer to be aligned and coupled in communication with the continuous slotted recesses to define alternating through-wafer channels and slotted recess portions. The method may further include selectively filling the residual slotted recess portions to define through-wafer ink channels. | 12-04-2014 |
20150035907 | INKJET NOZZLE DEVICE WITH SYMMETRICALLY CONSTRAINED BUBBLE FORMATION - An inkjet nozzle device for symmetrically constrained bubble formation includes: a firing chamber having and an end wall, opposite sidewalls and a nozzle aperture defined in a roof thereof; a baffle plate positioned between the sidewalls of the firing chamber, such that a pair of firing chamber entrances are defined between side edges of the baffle plate and the sidewalls; and an elongate heating element bonded to a floor of the firing chamber, the heater element extending longitudinally between the baffle plate and the end wall. The baffle plate is wider than the heater element. Further, a centroid of the heater element coincides with a midpoint between the baffle plate and the end wall. | 02-05-2015 |
20150109370 | PRINTHEAD SUBSTRATE, METHOD OF MANUFACTURING THE SAME, PRINTHEAD, AND PRINTING APPARATUS - A method of manufacturing a printhead substrate, including forming a metal pattern, including a portion forming a pair of electrodes, on an insulating member, forming a conductive film which covers the insulating member and the metal pattern, including a first portion forming a temperature detection element and a second portion except for the first portion, etching the second portion so as to form the pair of electrodes, and etching the first portion so as to form the temperature detection element which is connected to the pair of electrodes, wherein an etching amount in the etching the second portion is larger than a thickness of the conductive film, and an etching amount in the etching the first portion is smaller than the etching amount in the etching the second portion. | 04-23-2015 |
20150109371 | LIQUID EJECTION HEAD AND LIQUID EJECTION APPARATUS - In a liquid ejection head for ejecting liquid by using thermal energy, reduction of film thickness caused by elution of a protective layer when kogation on the protective layer is removed is uniformized and decrease in liquid ejection performance is suppressed. More specifically, a counter electrode is provided around a portion on which an ejection port of a flow path forming member is formed. | 04-23-2015 |
20150124024 | FLUID EJECTION DEVICE WITH PARTICLE TOLERANT THIN-FILM EXTENSION - In an embodiment, a fluid ejection device includes a thin-film layer formed over a substrate, a chamber layer formed over the thin-film layer, the chamber layer defining a fluidic channel that leads to a firing chamber, a slot extending through the substrate and into the chamber layer through an ink feed hole in the thin-film layer, and a particle tolerant thin-film extension of the thin-film layer that protrudes into the slot from between the substrate and the chamber layer. | 05-07-2015 |
20150290934 | LIQUID EJECTION HEAD - A liquid ejection head includes a discharge orifice configured to eject liquid; a device configured to generate energy for use in ejecting liquid; a pressure chamber partitioned by a wall, the pressure chamber accommodating the device and communicating with the discharge orifice; and a channel configured to supply liquid to the pressure chamber, wherein the discharge orifice has first and second protrusions protruding from the edge of the discharge orifice toward the central portion in an extending direction of the channel along the center line of the channel, and the interval between the base of the first protrusion and the base of the second protrusion in the extending direction of the channel is larger than the maximum interval between the edges of the discharge orifice in a direction perpendicular to the extending direction. | 10-15-2015 |
20150298463 | THERMAL HEAD AND THERMAL PRINTER PROVIDED WITH SAME - A thermal head which is capable of reducing heat concentration on heat generation portions, and a thermal printer provided with the thermal head are provided. A thermal head includes a substrate; a plurality of heat generation portions which are disposed aligned on the substrate; electrodes which are electrically connected to the heat generation portions; and a protection layer which coats the heat generation portions and a part of the respective electrodes. The protection layer includes a first protection layer which is disposed on the heat generation portions and a second protection layer which is disposed on the first protection layer and has a higher thermal conductivity than that of the first protection layer. A width of the second protection layer is larger than that of the first protection layer when seen in an arrangement direction of the heat generation portions. | 10-22-2015 |
20160053123 | THERMAL INKJET RECORDING METHOD - The present invention relates to a thermal ink-jet printing method including the step of ejecting a water-based ink including pigment-containing polymer particles from a print head by an action of a thermal energy, in which the polymer constituting the polymer particles includes not less than 78% by mass and not more than 88% by mass of a constitutional unit derived from an acrylic acid ester containing a hydrocarbon group having not less than 3 and not more than 8 carbon atoms, and not more than 22% by mass and not less than 12% by mass of a constitutional unit derived from acrylic acid, on the basis of a total mass of whole constitutional units in the polymer constituting the polymer particles; [2] a water dispersion for thermal ink-jet printing used in the above method; [3] a water-based ink for thermal ink-jet printing including the above water dispersion; and [4] a use of the above ink in a thermal ink-jet printing method. | 02-25-2016 |
20160059561 | ADDRESS ARCHITECTURE FOR FLUID EJECTION CHIP - A printhead including one or more fluid vias in fluid communication with a fluid supply, each of the one or more fluid vias being associated with a first number of heating elements, the heating elements being divided into groups of a second number of heating elements so as to form a number of primitive groups, and an electrical interface having at least one shift register that receives primitive address data to allow for selective application of electrical signals to the heating elements so that fluid is ejected from the printhead in accordance with image data, the number of primitive groups being dependent on the print resolution of the printhead so that a number of bits required for the at least one shift register to address each heater is independent of the print resolution of the printhead. | 03-03-2016 |
20160102217 | WHITE INKJET INK - A white inkjet ink includes an anionic surfactant having a molecular weight less than 10,000, a white pigment, a latex particle, and a balance of water. The white pigment has i) a density less than 3 g/cm | 04-14-2016 |
20160107445 | MICROFLUIDIC DIE WITH MULTIPLE HEATERS IN A CHAMBER - The present disclosure is directed to a microfluidic die that includes a first larger heater and a second smaller heater is a single chamber. The first heater is configured to form a primary bubble that ejects fluid from a nozzle associated with the chamber. The second heater is configured to form a secondary bubble to prevent blow back caused when the primary bubble bursts and ejects fluid from the nozzle. The first and second heater may be coupled to a single input trace and a single ground trace. | 04-21-2016 |
20160137861 | INK ADDITIVE COMBINATIONS FOR IMPROVING PRINTHEAD LIFETIME - An inkjet ink for improving printhead lifetimes includes: an aqueous-based ink vehicle; a colorant; an anti-kogation additive; and an anti-corrosion additive having at least one acetylenic group, the acetylenic group being absent any tertiary or quaternary α-carbon atoms. | 05-19-2016 |
20160250853 | DIGITAL THERMAL BINDER AND POWDER PRINTING | 09-01-2016 |