Patent application number | Description | Published |
20090257784 | IMAGE FORMING APPARATUS, PROCESS CARTRIDGE AND DEVELOPING DEVICE - An image forming apparatus includes a charger to charge an image carrying member, an optical device to irradiate a light onto the image carrying member to form an electrostatic latent image, a developing device to develop the electrostatic latent image on the image carrying member to form a developed image and a transfer device to transfer the developed image on a sheet. The developing device includes a developer container to store a developer including toner and a carrier, a developer supply device to supply the developer to the developer container, a driver device to drive the developer supply device, a developer collection device installed in the developer container to interlock with the driver device and collect a surplus developer left over due to supply of the developer from the developer supply device to the developer container, and a collected developer container to contain the developer collected by the developer collection device. | 10-15-2009 |
20100008701 | IMAGE FORMING APPARATUS, DEVELOPING DEVICE AND DEVELOPER DISCHARGE MECHANISM - In order to provide an image forming apparatus capable of maintaining the image quality by making smooth flowability of a surplus developer, which is discharged according to supply of a new developer (toner and carrier), toward a collection box, there are provided a stirring screw that electrify toner by stirring the toner together with a carrier; a casing that supports the stirring screw and stores a developer in which the toner and the carrier are mixed; a inlet used to supply the developer to the casing; a guide that guides the surplus developer discharged from the casing downward; and a reciprocating member that moves on a flow surface of the guide along which the surplus developer flows. | 01-14-2010 |
20110013917 | DEVELOPING DEVICE AND METHOD FOR DETECTING DETERIORATION OF DEVELOPER - According to one embodiment, a developing device includes a developer container to contain developer having toner and carrier, a toner replenishing unit to replenish the toner to the developer container, a carrier replenishing unit to replenish the carrier to the developer container, a discharge portion to discharge the developer from the developer container, a developer feeder to support magnetically the developer in the developer container and to feed the toner in the developer to a photoconductor on which an electrostatic latent image is formed, an electric conductor, provided separately from the photoconductor, to which the toner out of the developer supported by the developer feeder adheres, a detecting unit to detect a density of the toner adhered to on the electric conductor, and a controller to judge a deterioration status of the developer based on a detection result of the detecting unit and to replenish the toner and the carrier from the toner replenishing unit and the carrier replenishing unit to the developer container. | 01-20-2011 |
20110064429 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - According to one embodiment, an image forming apparatus includes a developing unit configured to store a developer includes a toner and a carrier and to form a developer image, a toner attachment amount detection portion configured to detect an attachment amount of a toner formed on a photoconductor or an intermediate transfer body, a developing bias voltage change portion configured to change a plurality of developing bias voltages including a developing contrast voltage in a manner that the detected attachment amount of the toner becomes a value in a predetermined range, a carrier supply time correction portion configured to correct a carrier supply time in response to the value of the changed developing contrast voltage, and a carrier supply portion configured to supply a carrier in a corrected carrier supply time at a predetermined timing. | 03-17-2011 |
20110064435 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - According to one embodiment, an image forming apparatus includes a supply device that supplies developer includes toner and carrier, a developing device configured to accommodate the developer includes toner and carrier in a manner that the developer is stirred and transported therein, and configured to discharge the developer in an overflow manner through a discharge opening, a screw that stirs and transports the developer in the developing device, and a control unit configured to change the rotation speed of the screw based on a predetermined index which varies in accordance with supply and consumption of the developer or an environmental condition when development is performed. | 03-17-2011 |
20110279502 | INK JET HEAD AND DRIVING METHOD THEREOF - According to one embodiment, an ink jet head has a pressure room that is filled with liquid, a nozzle which ejects the liquid in the pressure room, an actuator which varies a volume of the pressure room, and a processor. The processor outputs a voltage having a waveform which sequentially includes an increasing pulse for increasing the volume of the pressure room, a first decreasing pulse for decreasing the volume of the pressure room, and a second decreasing pulse for decreasing the volume of the pressure room, to the actuator as a driving voltage. | 11-17-2011 |
20110292108 | INK JET HEAD AND METHOD OF DRIVING THE SAME - According to one embodiment, an ink jet head includes pressure chambers filled with liquid, nozzles discharging the liquid that is in the pressure chambers, actuators changing the capacity of the pressure chambers, and a processor. The processor repeatedly outputs a waveform voltage including an expansion pulse, a ground potential, a contraction pulse, and a ground potential in this order, as a driving voltage with respect to the actuators. | 12-01-2011 |
20110310140 | INKJET RECORDING APPARATUS AND TREATMENT LIQUID SUPPLY METHOD - This invention provides an inkjet recording apparatus which is provided with a supply unit which supplies a treatment liquid to a recording medium fed from a container and a recording unit which supplies ink to the recording medium with the treatment liquid supplied thereto and forms an image. In the inkjet recording apparatus, the treatment liquid with a first amount per unit area is supplied from the supply unit to a first region of the recording medium, and the treatment liquid with a second amount different from the first amount per unit area is supplied from the supply unit to a second region of the recording medium. The ink with the same amount per unit area is supplied from the recording unit to the first and second regions with the treatment liquid supplied thereto. States of the recording medium and the ink in the first and second regions with the ink supplied thereto are detected, and the supply of the treatment liquid to be supplied to the recording medium is regulated based on the detected states of the recording medium and the ink. | 12-22-2011 |
20120069078 | INKJET RECORDING APPARATUS AND INKJET RECORDING METHOD - According to one embodiment, an inkjet recording apparatus includes a retaining roller, a charging member, an inkjet head, a reversing device, and a controller. The retaining roller retains a recording medium on the surface thereof and rotates. The charging member is arranged to be opposed to the surface of the retaining roller and attracts the recording medium to the surface of the retaining roller with electrostatic force and retains the recording medium on the surface of the retaining roller. The controller controls a position in an approaching and separating direction of the charging member with respect to the retaining roller if the recording medium is reversed by the reversing device after image formation on a first surface of the recording medium and then electrostatically attracted with a second surface of the recording medium faced to the outer side. | 03-22-2012 |
20120098880 | IMAGE FORMING APPARATUS, RECORDING MEDIUM CONVEYING APPARATUS, AND IMAGE FORMING METHOD - According to one embodiment, an image forming apparatus includes a conveying mechanism, a printing head, a charging device, a humidity sensor, and a controller. The conveying mechanism conveys a recording medium by adsorbing the medium using an electrostatic force. The printing head forms an image on the recording medium which is conveyed by the conveying mechanism. The charging device performs charging according to applied voltage, and adsorbs the recording medium using the electrostatic force, to the conveying mechanism. The humidity sensor detects the humidity in the apparatus. The controller determines voltage to be applied to the charging device in order to charge the charging device, on the basis of at least the humidity which is detected by the humidity sensor. | 04-26-2012 |
Patent application number | Description | Published |
20090129792 | IMAGE FORMING APPARATUS - According to an embodiment of the invention, degradation of carrier in a case is detected from the number of rotations of a developing roller. A predetermined quantity of carrier is replenished every time the developing roller reaches a predetermined number of rotations. An excess developer caused by an increase in bulk through carrier replenishment is discharged from a developer discharge port. The degraded old carrier in the case is replaced by new carrier little by little. | 05-21-2009 |
20090148192 | DEVELOPING DEVICE - In an embodiment, a reducing plate that dams up a part of a developer scraped up by a blade is provided. The reducing plate suppresses swell of the developer held up by a discharge mixer from fluctuating according to the rotation of the blade. Fluctuation in an excess developer discharged from a discharge port is suppressed and replace a deteriorated carrier in a development container with a new carrier little by little. | 06-11-2009 |
20090148193 | DEVELOPING DEVICE - In an embodiment, a contact pivoting plate, which comes into contact with a developer swelled by a discharge mixer, is provided in a case. The contact pivoting plate is pivoted according to a detection result of a temperature and humidity sensor to change the magnitude of resistance by the contact pivoting plate with respect to a flow of the developer. The height of the swell of the developer is suppressed from fluctuating according to an environmental change. The fluctuation in an amount of an excess developer discharged from a discharge port is suppressed to replace a deteriorated carrier in a development container with a new carrier little by little. | 06-11-2009 |
20100101419 | HYDROGEN SEPARATION APPARATUS AND PROCESS FOR MANUFACTURING THE SAME - [Object] To provide a hydrogen separation apparatus provided with an independent hydrogen permeable membrane and capable of suppressing or preventing deformation of the hydrogen permeable membrane, and a production process therefor. | 04-29-2010 |
20100124442 | DEVELOPING DEVICE, DEVELOPING METHOD, AND IMAGE FORMING APPARATUS - A developing device includes: a container configured to store a developer and have an agitating passage for supplying the developer to a developing roller; a rotatable agitating member configured to carry the developer along the agitating passage while agitating the developer; a discharge port configured to be provided a container wall surface on a side on which the developer is scraped down in the agitating passage and discharge an excess developer involved in the supply of the developer; and a heaping member configured to heap the developer near the discharge port and discharge the developer from the discharge port. | 05-20-2010 |
20110013945 | DEVELOPING DEVICE AND DEVELOPING METHOD FOR IMAGE FORMING APPARATUS - According to an embodiment, a developing device, comprising: a developing unit configured to store an initial two-component developer including an initial toner containing silica externally added and a carrier and to form a toner image on an image bearing member with the two-component developer; a discharging section configured to discharge a part of the initial developer from the developing unit; and a developer supplying unit configured to supply a supply developer including a supply toner containing silica externally added and the carrier to the developing unit, the amount of silica added to the supply toner being smaller than the amount of silica added to the initial toner. | 01-20-2011 |
20110020038 | DEVELOPING DEVICE - In an embodiment, a reducing plate that dams up a part of a developer scraped up by a blade is provided. The reducing plate suppresses swell of the developer held up by a discharge mixer from fluctuating according to the rotation of the blade. Fluctuation in an excess developer discharged from a discharge port is suppressed and replace a deteriorated carrier in a development container with a new carrier little by little. | 01-27-2011 |
20130182024 | INKJET HEAD AND AN INKJET RECORDING DEVICE - According to one embodiment, the inkjet head of an application example includes a pressure chamber for charging the ink, an actuator for changing the volume of the pressure chamber, a nozzle for discharging the ink inside the pressure chamber when the volume of the pressure chamber is changed, and a controller that, in the formation of one pixel by discharging ink drops from the nozzle, when the elapsed interval from discharging ink drops last time by the nozzle is less than the specified interval, outputs the discharging waveform corresponding to the ink drop number determined for the formation of the pixel, and when the elapsed interval is more than the specified interval, increases the number of ink drop discharge cycles above the number determined for the formation of the pixel. | 07-18-2013 |
Patent application number | Description | Published |
20090232525 | IMAGE FORMING APPARATUS, METHOD OF DETERMINING DETERIORATION DEGREE OF DEVELOPMENT AGENT, AND PROGRAM OF DETERMINING DETERIORATION DEGREE OF DEVELOPMENT AGENT - The present invention provides a technique to accurately grasp a deterioration state of a development agent in a development device, in a development system which supplies a new development agent consisting of a toner and a carrier and discharges an deteriorated development agent to maintain a performance of a development agent in a development device. | 09-17-2009 |
20100054765 | DEVELOPING DEVICE - A developing device includes a developer tank that contains a developer including a toner and a carrier, a developing agent supplier that develops a latent image by using the toner contained in the developer tank, a discharge port that is provided in a side surface of the developer tank and discharges the developer, and a discharge assisting member that protrudes from a downstream side of the discharge port in a direction of flow of the developer in the developer tank and in a direction crossing the direction of the flow of the developer. | 03-04-2010 |
20100054818 | DEVELOPING APPARATUS - A developing apparatus includes a tank configured to contain a developing agent including a toner and a carrier, the tank having a discharge port configured to discharge the developing agent overflowing from the tank, a supplier configured to develop a latent image by using the toner contained in the tank, a replenisher configured to contain the developing agent and to replenish the developing agent into the tank, and a controller configured to estimate an amount of the developing agent in the tank in according with the amount of the supplied developing agent and the amount of the replenished developing agent and to execute a forced discharge for forcibly discharging the developing agent contained in the tank from the discharge port based on the estimated amount of developing agent. | 03-04-2010 |
20100067931 | DEVELOPING DEVICE - A developing device includes a developer tank configured to contain a developer including a toner and a carrier, the developer tank having a discharge port which is provided in a lateral side surface of the developer tank and configured to discharge the developer, a developing agent supplier configured to develop a latent image by using the toner contained in the developer tank, and a plate-shaped member configured to be formed in a direction of height from a lower end of the discharge port and partially cover the discharge port to regulate the discharge of the developer. | 03-18-2010 |
20140334851 | DEVELOPING APPARATUS AND IMAGE FORMING APPARATUS - In accordance with one embodiment, a developing apparatus comprises a developing roller configured to hold developing agent and face to an image carrier; a housing configured to store the developing agent and support the developing roller; and a first gap adjusting section configured inside the housing at the downstream side of an opening end part of the housing in a rotation direction of the developing roller, and configured to protrude from an inner wall of the housing at the side parts in an axis direction of the developing roller. | 11-13-2014 |