Patent application number | Description | Published |
20100194839 | IMAGE ERASING APPARATUS - An image erasing apparatus includes: a scanner which detects a side of a sheet on which an image is formed using a thermally decolorable coloring agent; a heat roller which provides heat for the sheet having the image formed thereon; and a controller which causes a quantity of heat provided for the sheet from the heat roller when an image forming side detected by the scanner does not face the heat roller to be greater than a quantity of heat provided for the sheet from the heat roller when the image forming side faces the heat roller. | 08-05-2010 |
20100196063 | IMAGE FORMING APPARATUS - An image forming apparatus includes: a first image forming unit configured to form an image on a sheet using a first colorant to be heat-fixed on the sheet; a second image forming unit configured to form an image on the sheet using a second colorant that is erasable by heating; and a fixing device arranged further on a downstream side in a sheet conveying direction than the first image forming unit and further on an upstream side in the sheet conveying direction than the second image forming unit and capable of executing fixing processing for heat-fixing the image, which is formed on the sheet by the first image forming unit, on the sheet and executing erasing processing for heating the sheet, on which the image is formed with the second colorant, to erasing temperature to thereby erase the second colorant on the sheet. | 08-05-2010 |
20100271413 | IMAGE FORMING APPARATUS - An image forming apparatus includes: an ink-jet head configured to eject ink to form an image on a sheet; and a controller configured to control an amount of the ink ejected from the ink-jet head and reduce an ejection amount of the ink ejected to a damaged sheet to be smaller than an ejection amount of the ink ejected to an undamaged sheet. | 10-28-2010 |
20100272449 | IMAGE FORMING APPARATUS, IMAGE FORMING METHOD, AND COMPUTER-READABLE RECORDING MEDIUM HAVING IMAGE FORMING PROGRAM RECORDED THEREIN - There is provided an image forming apparatus including: an image data acquiring unit that acquires image data of an image formed on a sheet; an identification information acquiring unit that acquires identification information that identifies the sheet on which the image is formed; an image forming unit that forms an image based on the image data acquired by the image data acquiring unit on the sheet with a decolorable colorant which becomes colorless by a predetermined chemical reaction and that forms an identification information image based on the identification information on the sheet with a non-decolorable colorant which does not become colorless by the chemical reaction by which the decolorable colorant becomes colorless; and a storage control unit that stores the identification information and the image data of the image to be formed on the sheet, on which the identification information image corresponding to the identification information is formed, in a predetermined storage region in a correlated manner. | 10-28-2010 |
20110181641 | IMAGE RECORDING APPARATUS - According to one embodiment, an image recording apparatus has a printing unit and a controller. The printing unit prints—using a removable color material. The controller is configured to control the printing unit to print images on a paper over plural passes in a divided manner. | 07-28-2011 |
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 |
20110316221 | RECORDING MEDIUM HOLDING APPARATUS, IMAGE FORMING APPARATUS, AND IMAGE FORMING METHOD - According to one embodiment, an image forming apparatus includes an endless device, a power supply unit, an electric charge supplementary unit, and an image forming unit. The endless device is rotated. The power supply unit supplies a recording medium on a surface of the endless device with an electric charge. The electric charge supplementary unit supplements the electric charge to the recording medium which is rotated together with the endless device in the state of being attracted to the surface of the endless device by the electric charge provided by the power supply unit. The image forming unit forms an image on the recording medium attracted to the surface of the endless device. | 12-29-2011 |
20110316953 | RECORDING MEDIUM HOLDING DEVICE AND IMAGE FORMING APPARATUS - According to one embodiment, an image forming apparatus includes a drum, a transportation roller, a pressing roller, a power supply, and an image forming unit. The drum rotates, and the transportation roller transports a recording medium to the drum. The pressing roller presses the recording medium transported by the transportation roller on the surface of the drum. The power supply provides charge to the recording medium which is pressed on the surface of the drum by the pressing roller. The image forming unit forms an image on the recording medium which is provided with charge by the power supply and rotates along with the drum while being held on the surface of the drum. | 12-29-2011 |
20110318081 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - According to one embodiment, an image forming apparatus includes a curl forming unit, an endless device, an attracting unit, and an image forming unit. The curl forming unit forms a curl in a recording medium. The endless device holds the recording medium in which the curl is formed by the curl forming unit. The attracting unit applies attraction force for attraction to the surface of the endless device to the recording medium. The image forming unit forms an image on the recording medium held on the surface of the endless device by the attraction force applied by the attracting unit. | 12-29-2011 |
20120068401 | HOLDING DEVICE OF RECORDING MEDIUM, IMAGE FORMING APPARATUS, AND CONVEYING METHOD OF RECORDING MEDIUM - According to one embodiment, the image forming apparatus includes, an endless device having a plurality of suction holes, and a negative pressure chamber which communicates with the suction holes, a rotation mechanism which rotates the endless device, a suction mechanism which discharges air in the negative pressure chamber, an opening and closing mechanism which has a switching blade which opens and closes the suction holes, a driving mechanism which moves the switching blade to a first position and a second position, a recording head unit, a supply mechanism which supplies the recording medium to the endless device, and a controller. If the switching blade moves to the first position, the suction holes are shut. If the switching blade moves to the second position, the suction holes communicate with the negative pressure chamber. The controller drives the opening and closing mechanism according to the size of the recording medium. | 03-22-2012 |
20120069077 | MEDIUM HOLDING APPARATUS, INKJET IMAGE FORMING APPARATUS AND INKJET IMAGE FORMING METHOD - According to one embodiment, a medium holding apparatus includes an endless device configured to rotate at a predetermined circumferential speed, a charging member arranged to be opposed to the surface of the endless device and configured to apply a voltage to a medium and attract the medium to the endless device using electrostatic force, a charge removing member arranged to be opposed to the surface of the endless device and configured to discharge charges in the medium using an alternating voltage, and a controller configured to offset a reference voltage of the alternating voltage to a polarity opposite to the polarity of the voltage applied during the attraction. | 03-22-2012 |
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 |
20120069081 | CONVEYING DEVICE OF RECORDING MEDIUM AND IMAGE FORMING APPARATUS - According to one embodiment, the image forming apparatus has an endless device with a circumferential surface, a laminated cover which is disposed at the circumferential surface of the endless device, a rotation mechanism which rotate the endless device, a supply mechanism which supplies a recording medium to the endless device, a charging roller, a recording head unit, and a discharge mechanism. The laminated cover includes a metal layer and a dielectric layer. The metal layer has both end portions in the circumferential direction, and both side portions. The dielectric layer also has both end portions in the circumferential direction and both the side portions. At least a part of both the end portions and both the side portions of the dielectric layer has extended regions which protrude from a circumferential edge of the metal layer. | 03-22-2012 |
20120069111 | INKJET RECORDING APPARATUS AND INKJET RECORDING METHOD - According to one embodiment, an inkjet recording apparatus includes a holding roller, a holding device, an image forming device, a reversing device, and a controller. The holding roller holds a recording medium. The holding device presses the recording medium and holds the recording medium on the surface of the holding roller. The controller performs control to press the recording medium against the holding roller with first pressing force if the image forming device forms an image on a first surface of the recording medium and press the recording medium against the holding roller with second pressing force smaller than the first pressing force if the image forming device forms an image on a second surface of the recording medium after the image is formed on the first surface of the recording medium and the recording medium is reversed by the reversing device. | 03-22-2012 |
20120069113 | IMAGE FORMING APPARATUS, MEDIUM PROCESSING APPARATUS, AND IMAGE FORMING METHOD - According to one embodiment, an image forming apparatus includes a retaining roller, a triboelectric charging device, and an inkjet head. The retaining roller includes a first charging section including a first dielectric and a second charging section including a second dielectric, which have different triboelectric charging characteristics, alternately on the surface of the retaining roller, retains a recording medium on the surface, and rotates. The triboelectric charging device charges the surface of the retaining roller by friction. The inkjet head forms an image on the recording medium retained on the surface of the retaining roller. | 03-22-2012 |
20120069114 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - According to one embodiment, an image forming apparatus includes a retaining roller, a nipping device, a retaining device, an image forming head, and a controller. The retaining roller retains a recording medium and rotates. The nipping device is capable of operating to open and close and holds the recording medium between the nipping device and the surface of the retaining roller to mechanically retain the recording medium. The retaining device retains the recording medium on the surface of the retaining roller. The controller controls, on the basis of a condition for use of the recording medium, the nipping device to nip the recording medium between the nipping device and the surface of the retaining roller. | 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 |
20120098912 | CONVEYING DEVICE OF RECORDING MEDIUM AND IMAGE FORMING APPARATUS - According to one embodiment, an image forming apparatus includes, an endless device which has a circumferential surface, a laminated cover which is arranged onto the circumferential surface of the endless device in an overlapping manner, a rotation mechanism which rotates the endless device, a supply mechanism which supplies a recording medium to the endless device, a recording head unit, and a discharge mechanism. The laminated cover include a metal layer which has the inner surface which comes into contact with the circumferential surface of the endless device, and a dielectric layer which comes into contact with the metal layer. The laminated cover includes a hem portion which is formed to be folded back at least at a part of a circumferential edge region of the laminated cover, with the dielectric layer as the outside of the bending. | 04-26-2012 |
20130287416 | IMAGE FORMING APPARATUS - An image forming apparatus includes: a first image forming unit configured to form an image on a sheet using a first colorant to be heat-fixed on the sheet; a second image forming unit configured to form an image on the sheet using a second colorant that is erasable by heating; and a fixing device arranged further on a downstream side in a sheet conveying direction than the first image forming unit and further on an upstream side in the sheet conveying direction than the second image forming unit and capable of executing fixing processing for heat-fixing the image, which is formed on the sheet by the first image forming unit, on the sheet and executing erasing processing for heating the sheet, on which the image is formed with the second colorant, to erasing temperature to thereby erase the second colorant on the sheet. | 10-31-2013 |
20140112693 | IMAGE FORMING APPARATUS - An image forming apparatus includes: a first image forming unit configured to form an image on a sheet using a first colorant to be heat-fixed on the sheet; a second image forming unit configured to form an image on the sheet using a second colorant that is erasable by heating; and a fixing device arranged further on a downstream side in a sheet conveying direction than the first image forming unit and further on an upstream side in the sheet conveying direction than the second image forming unit and capable of executing fixing processing for heat-fixing the image, which is formed on the sheet by the first image forming unit, on the sheet and executing erasing processing for heating the sheet, on which the image is formed with the second colorant, to erasing temperature to thereby erase the second colorant on the sheet. | 04-24-2014 |