Patent application number | Description | Published |
20090202277 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A developing device facing an image carrier and including a developer carrier, a developer flying control member, and a development-noise control member. The developing device develops an electrostatic image formed on the image carrier by causing the developer to fly from the developer carrier to the image carrier upon an application of an alternating-current bias to the developer carrier. Noise produced by the development-noise control member vibrated by an oscillating electric field of the alternating-current bias is smaller than a noise produced by the developer flying control member vibrated by the oscillating electric field. | 08-13-2009 |
20090297212 | PROCESS CARTRIDGE AND IMAGE FORMING APPARATUS - A process cartridge and an image forming apparatus in which a charging roller is separated from a photosensitive drum by a predetermined distance and in which the separation between the charging roller and the photosensitive drum is released at the time of use without involving an increase in the burden on the user and erroneous releasing of the separation by user is prevented prior to use. The process cartridge, which is detachably mountable to the apparatus main body having an acting portion, includes a process cartridge frame, a locking portion locked with the frame to separate the charging roller from the photosensitive drum, a separation holding member having an acted portion which penetrates the frame and on which the acting portion can act, and a protruding portion provided on the frame and protruding beyond the acted portion at the position where the separation holding member is locked with the frame. | 12-03-2009 |
20090297219 | PROCESS CARTRIDGE - A member for performing separation holding of a developing roller of a process cartridge is provided at a position opposite from a photosensitive drum with respect to a swing center. A detachably mountable protective cover is mounted to the process cartridge and a projection of the protective cover is inserted between the photosensitive drum and a developing device frame which supports the developing roller. The projection of the protective cover is inserted in a non-contact state with the photosensitive drum and the developing device frame. | 12-03-2009 |
20110142487 | PROCESS CARTRIDGE AND DISASSEMBLING METHOD OF THE PROCESS CARTRIDGE - A process cartridge detachably mountable to a main assembly of an image forming apparatus includes an image-bearing member on which an electrostatic image is to be formed; a first frame; a bearing member, detachably mountable to the first frame, for rotatably supporting the image-bearing member; a first hole provided in the bearing member; a first wall, provided on the first frame, in which a second hole is provided; a second frame for rotatably supporting a developer carrying member on which a developer for developing the electrostatic image is to be carried; a second wall, provided on the second frame, in which a third hole is provided; and a connecting member including a shaft portion penetrating through the first hole, the second hole and the third hole and tightly engaging in the second hole, and including a flange portion, provided at an end portion of the shaft portion, for preventing the bearing member from being detached from the first frame. | 06-16-2011 |
20110229196 | PROCESS CARTRIDGE AND IMAGE FORMING APPARATUS - A process cartridge includes a drum; a rotatable roller including a first shaft end portion and a second shaft end portion; a bearing member for rotatably supporting ends of a shaft of the rotatable roller; an urging member for urging the rotatable roller via the bearing member in a drum contact direction; a cartridge frame for rotatably supporting the drum and for movably holding the rotatable roller via the bearing member; a movable guide member movable in an axial direction of the shaft of the rotatable roller and including a first contact portion; and a fixed guide member including a second contact portion. At least one of the first contact portion and the first shaft end portion has an inclined surface inclined with respect to the axial direction of the rotatable roller, and at least one of the second contact portion and the second shaft end portion has an inclined surface inclined with respect to the axial direction of the rotatable roller. | 09-22-2011 |
20130058675 | CARTRIDGE AND IMAGE FORMING APPARATUS - A cartridge includes: a rotatable member, including a metal shaft, supported movably in an axial direction of the metal shaft; an electroconductive member, supported movably in the axial direction in contact to an end surface of the metal shaft in one end side of the metal shaft, for constituting an electroconductive path for electrically connecting the metal shaft and a contact member provided in an image forming apparatus main assembly; an urging portion for urging the metal shaft via the electroconductive member in a direction from the one end side to another end side of the metal shaft; and an abutting portion for positioning the rotatable member by being abutted by the metal shaft. The electroconductive member includes a contact portion to the end surface of the metal shaft, at a portion other than a rotation center portion of the metal shaft at the end surface. | 03-07-2013 |
20130064568 | CARTRIDGE AND IMAGE FORMING APPARATUS - A cartridge detachably mountable to a main assembly of an image forming apparatus having a main assembly electric contact includes: a contact member for receiving pressure by the main assembly electric contact, wherein the contact member has a first surface as a contact portion for receiving the pressure by the main assembly electric contact and has a second surface bent from the first surface toward a side opposite from a side where the main assembly electric contact is provided; a holding member for holding the contact member; a portion to be limited provided at an end of the second surface; and a limiting portion, provided on the holding member, for limiting movement of the portion to be limited. | 03-14-2013 |
20130149011 | CARTRIDGE AND IMAGE FORMING APPARATUS - A cartridge detachably attachable to an image forming apparatus includes a developer storage chamber partitioned into a first storage portion and a second storage portion and configured to store a developer, a replenishment opening disposed in the second storage portion, through which the developer passes from inside the developer storage chamber to outside the developer storage chamber, and a conveyance member disposed in the second storage portion and configured to convey the developer in a predetermined conveying direction, the conveyance member including a first conveyance portion located on an upstream side of the replenishment opening to convey the developer in the conveying direction, and a second conveyance portion located on a downstream side of the replenishment opening to convey an amount of a developer smaller than that of the developer conveyed by the first conveyance portion in the conveying direction. | 06-13-2013 |
20130164030 | PROCESS CARTRIDGE AND IMAGE FORMING APPARATUS - A process cartridge demountably mountable on an apparatus body of an image forming apparatus includes: an image carrying member; a first frame body configured to support the image carrying member; a developer carrying member configured to carry developer; a second frame body configured to support the developer carrying member; an urging member configured to urge the developer carrying member against the image carrying member; a holding member mounted between the first frame member and the second frame member and configured to hold the urging member so as not to cause the urging member to apply the urging force to the first frame member and the second frame member, and the urging member is configured to apply the urging force to the first frame member and the second frame member upon removal of the holding member. | 06-27-2013 |
20140003838 | PROCESS CARTRIDGE AND IMAGE FORMING APPARATUS | 01-02-2014 |
20140294448 | DEVELOPER SUPPLY CARTRIDGE, PROCESS CARTRIDGE AND IMAGE FORMING APPARATUS - A developer supply cartridge detachably mountable to a main assembly of an image forming apparatus includes: a developer accommodating portion; a shutter portion movable between a closed position and an open position; and a movable portion for moving the shutter portion. The movable portion is movable between a first position where the shutter portion is positioned in the closed position. The movable portion performs a preventing operation for preventing movement thereof to the first position by engagement thereof with an engaging portion, provided in the main assembly side, when the movable portion is positioned in the second position during movement of the developer supply cartridge to the main assembly. | 10-02-2014 |