Abstract: An image forming apparatus includes a photosensitive drum, a charging roller, a transfer roller, and a control circuit. The control circuit is configured to perform an alternating bias control. During the alternating bias control, the control circuit causes the charging roller and the transfer roller to rotate in accordance with a rotation of the photosensitive drum, and controls the charging roller to alternately turn off and on to a first bias of a predetermined polarity and the transfer roller to alternately turn off and on to a second bias of the predetermined polarity, such that at least a part of a region of the photosensitive drum biased by the first bias is not biased by the second bias, and that at least a part of a region of the photosensitive drum biased by the second bias is not biased by the first bias.

Abstract: In one embodiment, the image forming apparatus has a transfer member, a detector, a display, a transfer bias power source circuit, a memory, a processor, and so on. The processor calculates a value indicating a resistance value of a sheet, based on a measurement value of a voltage value or a current value of the transfer member by the detector. Further, when the calculated value indicating the resistance value of the sheet is a value outside a range of an allowable range stored in the memory, the processor makes the display display a message to recommend adjustment of a transfer bias to be applied to the transfer member by the transfer bias power source circuit.

Abstract: In one embodiment, the image forming apparatus has a transfer member, a detector, a display, a transfer bias power source circuit, a memory, a processor, and so on. The processor calculates a value indicating a resistance value of a sheet, based on a measurement value of a voltage value or a current value of the transfer member by the detector. Further, when the calculated value indicating the resistance value of the sheet is a value outside a range of an allowable range stored in the memory, the processor makes the display display a message to recommend adjustment of a transfer bias to be applied to the transfer member by the transfer bias power source circuit.

Abstract: An image forming apparatus according to an embodiment includes a photoconductive drum and a charging roller facing the photoconductive drum. The charging roller receives a potential bias. A controller performs an electrostatic cleaning operation by alternately applying, to the charging roller, a first bias and a second bias of opposite polarity to the first bias so that contaminants repelled by the first bias and contaminants repelled by the second bias are transferred from the charging roller to the photoconductive drum.

Abstract: An image forming apparatus according to an embodiment includes a photoconductive drum and a charging roller facing the photoconductive drum. The charging roller receives a potential bias. A controller performs an electrostatic cleaning operation by alternately applying, to the charging roller, a first bias and a second bias of opposite polarity to the first bias so that contaminants repelled by the first bias and contaminants repelled by the second bias are transferred from the charging roller to the photoconductive drum.

Abstract: An image forming apparatus includes an image carrying member to carry a toner image, a drive device to drive the image carrying member, a cleaning member to slide in contact with the image carrying member so as to remove toner remaining on the image carrying member after transferring the toner image onto a sheet from the image carrying member, and a controller, so as to perform a reverse rotation to rotate and stop the image carrying member in a reverse direction of a forward direction at time of image formation and then perform a forward operation to rotate and stop the image carrying member in the forward direction, to control the drive device on the basis of a use amount of the image carrying member.

Abstract: An image forming apparatus includes an image carrying member to carry a toner image, a drive device to drive the image carrying member, a cleaning member to slide in contact with the image carrying member so as to remove toner remaining on the image carrying member after transferring the toner image onto a sheet from the image carrying member, and a controller, so as to perform a reverse rotation to rotate and stop the image carrying member in a reverse direction of a forward direction at time of image formation and then perform a forward operation to rotate and stop the image carrying member in the forward direction, to control the drive device on the basis of a use amount of the image carrying member.

Abstract: A voltage adjusting thin plate 16 is arranged below a roller before transfer 7 so as to be abutted on a surface of the roller before transfer 7 at a side opposite to a side where a transfer wire 18 of a transfer device 9 is located. A paper powder removing thin plate 17 is arranged at a lateral side of the roller before transfer 7 so as to be abutted on a surface of the roller before transfer 7 at the same side as a side where the transfer wire 18 of the transfer device 9 is located. A bias voltage whose polarity is the same as a polarity of toner is applied to the voltage adjusting thin plate 16 only for a desired period, at least, just after the image forming apparatus 1 is activated and while application of voltage to the transfer device 9 is being stopped. As materials of the voltage adjusting thin plate 16 and the paper powder removing thin plate 17, preferably two-axial extensible polyester film is used.

Abstract: A voltage adjusting thin plate 16 is arranged below a roller before transfer 7 so as to be abutted on a surface of the roller before transfer 7 at a side opposite to a side where a transfer wire 18 of a transfer device 9 is located. A paper powder removing thin plate 17 is arranged at a lateral side of the roller before transfer 7 so as to be abutted on a surface of the roller before transfer 7 at the same side as a side where the transfer wire 18 of the transfer device 9 is located. A bias voltage whose polarity is the same as a polarity of toner is applied to the voltage adjusting thin plate 16 only for a desired period, at least, just after the image forming apparatus 1 is activated and while application of voltage to the transfer device 9 is being stopped. As materials of the voltage adjusting thin plate 16 and the paper powder removing thin plate 17, preferably two-axial extensible polyester film is used.

Abstract: A method and apparatus for forming an image is provided by visualizing a latent image on a photosensitive member with a toner having an electrical resistance, transferring the visualized image to an image recording medium, cleaning with a cleaning blade a residual toner adhering to a surface of the photosensitive member after the transfer of the latent image to the image recording medium, and charge injecting a biasing voltage of a predetermined magnitude to the residual toner with a conductive polyester film, whereby at least part of a surface potential of the photosensitive member is removed. The conductive polyester film is fixedly attached to a tip end of the cleaning blade.

Abstract: In order to form high-quality images, the positive residual charge on a small-diameter photosensitive drum is efficiently diselectified and the charge built-up is effected rapidly.

Abstract: An image forming apparatus is disclosed with a cleaner assembly for removing toner remaining on the surface of the image bearing body that includes a rotating paddle for conveying toner to a collector. The image forming apparatus includes a developer for developing a static latent image on an image bearing body using toner, a transfer unit for transferring a developed image on a transfer member, a cleaner assembly in sliding contact with the surface of the image bearing body, a rotating paddle having a toner-conveying face, and a toner scraping sheet in contact with the rotating paddle conveying face. The tips of the rotating paddle may be angled to reduce friction and wear.