摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.