Patent application number | Description | Published |
20090028601 | IMAGE FORMING APPARATUS - An image forming apparatus forms an image on a recording material, and detachably mounts which process cartridges having photosensitive drums. The apparatus includes a main assembly, a rotatable openable member, a belt receiving an image or carrying the recording material, supporting members supporting the process cartridges at different levels and movable between drum-contacting and retracted positions, and a connecting member moving the supporting member when the openable member moves to position the supporting member at the drum-contacting position when the openable member is closed, and position the supporting member at the retracted position when the openable member is opened, and including a shaft whose axis crosses the openable member rotational axis, first connecting portions rotatably connected with respective supporting members, and a second connecting portion engaging the openable member and fixed to the shaft closer to the openable member than the first connecting portions are fixed to the shaft. | 01-29-2009 |
20090290905 | IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE - An image forming apparatus forms an image on a recording material, detachably mounts a process cartridge including a photosensitive drum, and includes first and second positioning portions respectively positioning the drum upstream and downstream with respect to a cartridge mounting direction, a coupling engaging a drum coupling and transmitting a driving force to the drum, and a support supporting the cartridge at a first position for positioning the drum to the first and second positioning portions and at a second position spacing the drum away from the first and second positioning portions to permit cartridge mounting and dismounting. The support includes a guide engaging the cartridge, and a third positioning portion limiting cartridge rotation relative to the first and second positioning portions when the coupling transmits a driving force to the drum coupling and for positioning the cartridge lower portion at an upstream position with respect to the mounting direction. | 11-26-2009 |
20100276871 | IMAGE FORMING APPARATUS - An image forming apparatus includes: an image forming unit that forms an image on a sheet; a discharging roller pair that discharges the sheet, on which the image is formed, onto a stacking portion with a rotation in a first direction, and conveys the sheet to a re-conveying path for conveying the sheet to the image forming unit again with a rotation in a second direction opposite to the first direction; and a skew feed correction member that is provided in the re-conveying path, and contacts against a leading edge of the sheet conveyed by the rotation in the second direction to correct skew feed of the sheet, wherein sheet conveying force when contacting the leading edge of the sheet against the skew feed correction member is smaller than sheet conveying force of the discharging roller pair when discharging the sheet onto the stacking portion. | 11-04-2010 |
20120275823 | IMAGE FORMING APPARATUS - An image forming apparatus forms an image on a recording material, and detachably mounts process cartridges having photosensitive drums. The apparatus includes a main assembly, a rotatable openable member, a belt receiving an image or carrying the recording material, supporting members supporting the process cartridges at different levels and movable between drum-contacting and retracted positions, and a connecting member moving the supporting member when the openable members moves to position the supporting member at the drum-contacting position when the openable member is closed, and position the supporting member at the retracted position when the openable member is opened, and including a shaft whose axis crosses the openable member rotational axis, first connecting portions rotatably connected with respective supporting members, and a second connecting portion engaging the openable member and fixed to the shaft closer to the openable member than the first connecting portions are fixed to the shaft. | 11-01-2012 |
20120321343 | IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE - An image forming apparatus forms an image on a recording material, detachably mounts a process cartridge including a photosensitive drum, and includes first and second positioning portions respectively positioning the drum upstream and downstream with respect to a cartridge mounting direction, a coupling engaging a drum coupling and transmitting a driving force to the drum, and a support supporting the cartridge at a first position positioning the drum to the first and second positioning portions and at a second position spacing the drum away from the first and second positioning portions to permit cartridge mounting and dismounting. The support includes a guide engaging the cartridge, and a third positioning portion limiting cartridge rotation relative to the first and second positioning portions when the coupling transmits a driving force to the drum coupling and for positioning the cartridge lower portion at an upstream position with respect to the mounting direction. | 12-20-2012 |
20140044451 | IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE - An image rewriting apparatus for forming an image on a recording material. A process cartridge, including a photosensitive drum and a process device actable on the drum, is detachably mountable to a main assembly of the image forming apparatus in a direction of an axis of the drum. The image forming apparatus includes a first positioning portion, provided above the cartridge, for positioning, with respect to a direction crossing with the axis of the drum, the drum at an upstream position with respect to a mounting direction in which the cartridge is mounted to the main assembly of the apparatus, and a second positioning portion, provided above the cartridge at a downstream position with respect to the mounting direction, for positioning the drum with respect to is direction crossing with the axis of the drum. A third positioning portion limits rotation of the cartridge relative to the first positioning portion and the second positioning portion when the main assembly coupling transmits a driving force to the drum coupling and positions the lower portion of the cartridge at an upstream position with respect to the mounting direction. | 02-13-2014 |