Patent application number | Description | Published |
20080285988 | Image forming apparatus and recording-medium feeding method - An image forming apparatus includes a storage unit configured to store a recording medium, an image forming unit configured to form an image on the recording medium, a paper feed unit configured to supply the recording medium from the storage unit, a conveying unit configured to convey the recording medium supplied by the paper feed unit to the image forming unit, and a control unit configured to control the paper feed unit and the conveying unit in conveying the recording medium. In accordance with a conveyance state in which the recording medium supplied from the storage unit by the paper feed unit is conveyed to the conveying unit, the control unit controls the conveying speed of the next recording medium supplied by the paper feed unit. | 11-20-2008 |
20100221039 | COLOR ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS - A color electrophotographic image forming apparatus includes cartridge mounting portions for dismountably mounting cartridges; an intermediary transfer member onto which developed images formed on electrophotographic photosensitive drums are transferred, the intermediary transfer member being provided opposed to the drums; an image forming unit comprising the cartridge mounting portions and the intermediary transfer member, the unit being movable between a transfer position for transferring, onto a sheet, the developed images transferred onto the intermediary transfer member from drums, a cartridge mounting and dismounting position for mounting and dismounting the cartridges relative to the cartridge mounting portions, and an intermediary transfer member mounting and dismounting position for mounting and dismounting the intermediary transfer member relative to a main assembly; and a unit movement preventing means for permitting the unit to move the intermediary transfer member mounting and dismounting position when no cartridge is mounted to any of the cartridge mounting portions, and for preventing the unit from moving to the intermediary transfer member mounting and dismounting position when the cartridge is mounted to at least one of the cartridge mounting portions. | 09-02-2010 |
20110149354 | IMAGE FORMING APPARATUS - An image forming apparatus includes a cover member which is openable and closable with respect to main assembly of the image forming apparatus; and an image reading portion, movable to a first position and a second position which is retracted from an image forming portion more than the first position, for reading an image of an original. The cover member is movable to a first open position in which the cover member is open with respect to the main assembly and to a second open position in which the cover member is further open with respect to the main assembly. The image reading portion is movable from the first position to the second position in interrelation with movement of the cover member from a closed position, in which the cover member is closed with respect to the main assembly, toward the second open position, and is movable from the second position to the first position in interrelation with movement of the cover member from the second open position toward the closed position. The image reading portion is located at the first position during movement of the cover member from the closed position to the first open position and is moved from the first position to the second position in interrelation with the cover member during movement of the cover member from the first open position to the second open position. | 06-23-2011 |
20110211863 | COUPLING PART, PHOTOSENSITIVE DRUM, PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS - A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, wherein the main assembly includes a motor, a main assembly side gear for receiving driving force from the motor, a hole defined by twisted surfaces, the hole being substantially coaxial with the gear, and a main assembly side grounding contact provided in the hole, the process cartridge includes an electrophotographic photosensitive drum; process mechanisms actable on the photosensitive drum; and a projection engageable with the twisted surfaces, the projection being provided at a longitudinal end of the photosensitive drum, wherein when the main assembly side gear rotates with the hole and projection engaged with each other, rotational driving force is transmitted from the gear to the photosensitive drum through engagement between the hole and the projection; and a cartridge side grounding contact electrically connected with the electrophotographic photosensitive drum for electrically grounding the electrophotographic photosensitive drum when the process cartridge is mounted to the main assembly of the apparatus, the cartridge side grounding contact being provided on the projection so as to be electrically connectable with the main assembly side grounding contact | 09-01-2011 |
20120128381 | IMAGE FORMING APPARATUS - An image forming apparatus includes a rotatable belt, a detection unit configured to detect, at a detecting position, an object on the belt, a cartridge that is attachable to and detachable from a main body of the apparatus independently of the belt, and an openable and closable member that is openable and closable relative to the body to attach and detach the cartridge to and from the body. When the detection unit is at the detecting position, at least a part of the detection unit is located in a space used for attachment and detachment of the cartridge, and, when the detection unit is at a retracted position, which is outside of a space used for attachment and detachment of the cartridge, at least a part of the detection unit is located in a space that is formed by opening the openable and closable member relative to the body. | 05-24-2012 |
20130228967 | IMAGE FORMING APPARATUS - An image forming apparatus capable of easily performing jammed sheet recovery in a sheet feeding portion is provided. | 09-05-2013 |
20140144759 | BELT TRANSPORTING DEVICE AND IMAGE FORMING APPARATUS - A belt transporting device includes a belt; first and second adjustment members provided at two respective ends of a tension roller in a belt width direction orthogonal to a direction of rotation of the belt, the first and second adjustment members each being movable by receiving a force from the belt; and a link member that interlocks the movement of the first adjustment member and the movement of the second adjustment member. If the belt is laterally shifted in the belt width direction, one of the first and second adjustment members moves by receiving a force from the belt while the other is moved by the link member such that the tension roller is tilted with respect to a driving roller. | 05-29-2014 |
20140205322 | COUPLING PART, PHOTOSENSITIVE DRUM, PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS - An electrophotographic photosensitive drum comprises a cylinder having a photosensitive layer formed thereon, with the cylinder being rotatable about an axis thereof. A driving force transmitting part is securely fixed to one axial end of the cylinder. The driving force transmitting part includes (i) a gear encircling a peripheral portion of the driving force transmitting part and (ii) a projection disposed on a side of the gear opposite from the cylinder, with the projection having a base and a free end. At least a portion of a cross-section of the projection at the base is offset from a corresponding portion of a cross-section of the projection at the free end, as seen in a direction of the axis. | 07-24-2014 |