Abstract: An image forming apparatus includes an apparatus body including a control board, a draw-out unit including a photosensitive drum configured to bear a toner image and rotate about a rotation axis, a developing unit, and a unit contact, the developing unit including a developing roller and a memory, and a door configured to face the draw-out unit at a closed position. The door includes a door contact electrically connected to the control board. The draw-out unit includes a facing surface configured to face the door positioned at the closed position, and a grip portion provided at a center portion of the facing surface in an axial direction of the rotation axis. The unit contact is provided in a region outside an end surface of the grip portion in the axial direction and below the grip portion in a vertical direction.

Abstract: An image forming apparatus includes an apparatus body including a control board, a draw-out unit including a photosensitive drum configured to bear a toner image and rotate about a rotation axis, a developing unit, and a unit contact, the developing unit including a developing roller and a memory, and a door configured to face the draw-out unit at a closed position. The door includes a door contact electrically connected to the control board. The draw-out unit includes a facing surface configured to face the door positioned at the closed position, and a grip portion provided at a center portion of the facing surface in an axial direction of the rotation axis. The unit contact is provided in a region outside an end surface of the grip portion in the axial direction and below the grip portion in a vertical direction.

Abstract: An image forming apparatus includes an apparatus body including a control board, a draw-out unit including a photosensitive drum configured to bear a toner image and rotate about a rotation axis, a developing unit, and a unit contact, the developing unit including a developing roller and a memory, and a door configured to face the draw-out unit at a closed position. The door includes a door contact electrically connected to the control board. The draw-out unit includes a facing surface configured to face the door positioned at the closed position, and a grip portion provided at a center portion of the facing surface in an axial direction of the rotation axis. The unit contact is provided in a region outside an end surface of the grip portion in the axial direction and below the grip portion in a vertical direction.

Abstract: An image forming apparatus includes an apparatus body including a control board, a draw-out unit including a photosensitive drum configured to bear a toner image and rotate about a rotation axis, a developing unit, and a unit contact, the developing unit including a developing roller and a memory, and a door configured to face the draw-out unit at a closed position. The door includes a door contact electrically connected to the control board. The draw-out unit includes a facing surface configured to face the door positioned at the closed position, and a grip portion provided at a center portion of the facing surface in an axial direction of the rotation axis. The unit contact is provided in a region outside an end surface of the grip portion in the axial direction and below the grip portion in a vertical direction.

Abstract: An image forming apparatus includes an apparatus body and a unit detachably mounted to the apparatus body and comprising a unit body, a cam, a first movement member, and a second movement member. The unit includes a first contact portion, an urging portion, and a second contact portion. The second movement member is attachable to the first movement member in a first manner or a second manner. A detection pattern of a detection signal differs between a state in which the second movement member is in contact with the first contact portion and a state in which the second movement member is in contact with the second contact portion, and differs between a state in which the second movement member is attached in the first manner and a state in which the second movement member is attached in the second manner.

Abstract: An image forming apparatus including a cleaning unit removably mountable to an apparatus main body under a state of being supported by a transfer unit, and movable with respect to the transfer unit in a longitudinal direction of a cleaning member under a state of not being mounted to the apparatus main body. The apparatus main body includes a frame unit portion configured to position a cartridge with respect to the apparatus main body in an axial direction of a photosensitive drum. The frame unit portion is configured to position the cleaning member with respect to the apparatus main body in the longitudinal direction under a state in which the transfer unit is mounted to the apparatus main body.

Abstract: An image forming apparatus including a cartridge having an image carrying member, and an apparatus main body from which the cartridge is capable of being detached in a longitudinal direction of the cartridge. While being positioned such that a first end side of the cartridge is in contact with a positioning portion of a frame, the cartridge that has been inserted when a door is in an open position is disposed under an intermediate transfer body such that a distance to a surface of the intermediate transfer body opposing the cartridge is greater on a second end side than on the first end side, and by moving the door to a closed position, the cartridge is pivoted with urging force of an urging member and the image carrying member is made to come into contact with the intermediate transfer body.

Abstract: A separation cam is disposed on a shaft of an opposing roller. The separation cam rotates about the shaft in response to a separation unit separating an intermediate transfer belt from a photosensitive drum, and the separation cam thereby separates a secondary transfer roller from the intermediate transfer belt.

Abstract: An image forming apparatus includes an apparatus body and a unit detachably mounted to the apparatus body and comprising a unit body, a cam, a first movement member, and a second movement member. The unit includes a first contact portion, an urging portion, and a second contact portion. The second movement member is attachable to the first movement member in a first manner or a second manner. A detection pattern of a detection signal differs between a state in which the second movement member is in contact with the first contact portion and a state in which the second movement member is in contact with the second contact portion, and differs between a state in which the second movement member is attached in the first manner and a state in which the second movement member is attached in the second manner.

Abstract: A separation cam is disposed on a shaft of an opposing roller. The separation cam rotates about the shaft in response to a separation unit separating an intermediate transfer belt from a photosensitive drum, and the separation cam thereby separates a secondary transfer roller from the intermediate transfer belt.

Abstract: An image forming apparatus charges toner on a transfer belt by using a first brush and collects the toner, in which a second brush is provided on the upstream side of the first brush, and the amount of inroad of the second brush into the transfer belt is larger than the amount of inroad of the first brush into the transfer belt.

Abstract: An image forming apparatus including a cleaning unit removably mountable to an apparatus main body under a state of being supported by a transfer unit, and movable with respect to the transfer unit in a longitudinal direction of a cleaning member under a state of not being mounted to the apparatus main body. The apparatus main body includes a frame unit portion configured to position a cartridge with respect to the apparatus main body in an axial direction of a photosensitive drum. The frame unit portion is configured to position the cleaning member with respect to the apparatus main body in the longitudinal direction under a state in which the transfer unit is mounted to the apparatus main body.

Abstract: An image forming apparatus including a cleaning unit removably mountable to an apparatus main body under a state of being supported by a transfer unit, and movable with respect to the transfer unit in a longitudinal direction of a cleaning member under a state of not being mounted to the apparatus main body. The apparatus main body includes a frame unit portion configured to position a cartridge with respect to the apparatus main body in an axial direction of a photosensitive drum. The frame unit portion is configured to position the cleaning member with respect to the apparatus main body in the longitudinal direction under a state in which the transfer unit is mounted to the apparatus main body.

Abstract: An image forming apparatus charges toner on a transfer belt by using a first brush and collects the toner, in which a second brush is provided on the upstream side of the first brush, and the amount of inroad of the second brush into the transfer belt is larger than the amount of inroad of the first brush into the transfer belt.

Abstract: A sheet detection unit includes a photo-interrupter, a shutter holder, and shutter members held to be movable relative to the shutter holder. The shutter members include a sheet rear end detection portion capable of switching an optical axis between a light-interrupted state and a light-transmitted state and each are supported to be movable to an abutment position where the shutter member causes an abutment surface to protrude, and also movable to a retracted position where the shutter member is retracted from a sheet conveyance path. Based on a detection signal output from the photo-interrupter by the sheet front end detection portion and the sheet rear end detection portion moving relative to the optical axis, a control unit determines the presence or absence of a sheet.

Abstract: An image forming apparatus including a cleaning unit removably mountable to an apparatus main body under a state of being supported by a transfer unit, and movable with respect to the transfer unit in a longitudinal direction of a cleaning member under a state of not being mounted to the apparatus main body. The apparatus main body includes a frame unit portion configured to position a cartridge with respect to the apparatus main body in an axial direction of a photosensitive drum. The frame unit portion is configured to position the cleaning member with respect to the apparatus main body in the longitudinal direction under a state in which the transfer unit is mounted to the apparatus main body.

Abstract: A sheet detection unit includes a photo-interrupter, a shutter holder, and shutter members held to be movable relative to the shutter holder. The shutter members include a sheet rear end detection portion capable of switching an optical axis between a light-interrupted state and a light-transmitted state and each are supported to be movable to an abutment position where the shutter member causes an abutment surface to protrude, and also movable to a retracted position where the shutter member is retracted from a sheet conveyance path. Based on a detection signal output from the photo-interrupter by the sheet front end detection portion and the sheet rear end detection portion moving relative to the optical axis, a control unit determines the presence or absence of a sheet.

Abstract: An image forming apparatus includes a sheet stacking portion, a feed portion, a transfer portion transferring a toner image on a sheet fed by the feed portion, and a switching portion. The switching portion switches the sheet stacking portion between a grounded condition in which the sheet stacking portion is electrically earthed and an insulated condition in which the sheet stacking portion is electrically insulated. The sheet stacking portion is switched into the insulated condition in a state in which the transfer bias is applied and the sheet stacking portion is switched into the grounded condition in a state in which no transfer bias is applied.

Abstract: An image forming apparatus including a cartridge having an image carrying member, and an apparatus main body from which the cartridge is capable of being detached in a longitudinal direction of the cartridge. While being positioned such that a first end side of the cartridge is in contact with a positioning portion of a frame, the cartridge that has been inserted when a door is in an open position is disposed under an intermediate transfer body such that a distance to a surface of the intermediate transfer body opposing the cartridge is greater on a second end side than on the first end side, and by moving the door to a closed position, the cartridge is pivoted with urging force of an urging member and the image carrying member is made to come into contact with the intermediate transfer body.

Abstract: An image forming apparatus includes: a photosensitive member configured to be rotated; scanning means for scanning, by light corresponding to image data, the photosensitive member that is charged, thereby forming an electrostatic latent image on the photosensitive member; and a contacting member in contact with the photosensitive member to form a nip portion. In a correction mode in which a shift of an image is corrected based on a detection result obtained by detecting, at the nip portion, an electrostatic latent image for correction formed on the photosensitive member by the scanning means, a width of the electrostatic latent image for correction is equal to or more than a width of the nip portion in a rotation direction of the photosensitive member.