Patent application number | Description | Published |
20090003875 | PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS - A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, includes an electrophotographic photosensitive drum; developing roller for developing an electrostatic latent image formed on the electrophotographic photosensitive drum; drum frame supporting the electrophotographic photosensitive drum; a developing frame supporting the developing roller, the developing frame is movable relative to the drum frame and is capable of taking a contacting position in which the developing roller is in contact with the electrophotographic photosensitive drum; and a force receiving device including a first force receiving portion for receiving a first external force and a second force receiving portion for receiving a second external force, wherein the second force receiving portion is movable relative to the developing frame, wherein the second force receiving portion is placed in a stand-by position retracted from an operating position by the first force receiving portion receiving the first external force, and is movable from the stand-by position to the operating position for moving the developing frame from the contacting position to the spacing position, wherein a distance through which the second force receiving portion moves from the stand-by position to the operating position is larger than a distance through which the first force receiving portion is moved by the first external force. | 01-01-2009 |
20090003876 | PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS - A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, includes an electrophotographic photosensitive drum; developing roller for developing an electrostatic latent image formed on the electrophotographic photosensitive drum; drum frame supporting the electrophotographic photosensitive drum; a developing frame supporting the developing roller, the developing roller being movable relative to the drum frame between a contacting position in which the developing roller is in contact with the electrophotographic photosensitive drum and a spacing position in which the developing roller is spaced from the electrophotographic photosensitive drum; a force receiving member, provided movably relative to the developing frame, for receiving an external force, wherein the force receiving member is capable of taking an operating position for moving the developing frame from the contacting position to the spacing position by receiving the external force, and a stand-by position retracted from the operating position; an urging portion for urging the force receiving member from the stand-by position toward the operating position; and an engaging portion for engaging with the force receiving member to hold the force receiving member in the stand-by position against an urging force of the urging portion. | 01-01-2009 |
20090041498 | IMAGE FORMING APPARATUS - In an image forming apparatus in which a tray, on which a plurality of cartridges of different sizes can be mounted, is able to be drawn out, a waste of space occurs. A cartridge ( | 02-12-2009 |
20100272469 | IMAGE FORMING APPARATUS - An image forming apparatus has a tray, which is able to be drawn out of the apparatus and on which a plurality of cartridges of different sizes can be mounted. A cartridge, being the largest in size among a plurality of process cartridges, is detachably arranged at a location at which it is first exposed to outside when a cartridge tray is drawn out. A developer storage portion of the largest cartridge has the largest capacity and stores a developer of a black color. | 10-28-2010 |
20110064459 | PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS - A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, includes an electrophotographic photosensitive drum; developing roller for developing an electrostatic latent image formed on the electrophotographic photosensitive drum; drum frame supporting the electrophotographic photosensitive drum; a developing frame supporting the developing roller, the developing frame is movable relative to the drum frame and is capable of taking a contacting position in which the developing roller is in contact with the electrophotographic photosensitive drum; and a force receiving device including a first force receiving portion for receiving a first external force and a second force receiving portion for receiving a second external force, wherein the second force receiving portion is movable relative to the developing frame, wherein the second force receiving portion is placed in a stand-by position retracted from an operating position by the first force receiving portion receiving the first external force, and is movable from the stand-by position to the operating position for moving the developing frame from the contacting position to the spacing position, wherein a distance through which the second force receiving portion moves from the stand-by position to the operating position is larger than a distance through which the first force receiving portion is moved by the first external force. | 03-17-2011 |
20110103826 | ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS - An electrophotographic image forming apparatus for forming an image on a recording material, includes (i) a drum cartridge including an image bearing member and charging device for charging a surface of the image bearing member, the drum cartridge being demountably mounted to a main assembly of the electrophotographic image forming apparatus; a rotary supporting a plurality of developing device each having a developer carrying member for developing an electrostatic latent image formed on the image bearing member, the rotary being swingably mounted to the main assembly of the apparatus through a supporting member and being rotatable, relative to the supporting member, to bring the developing device to a developing position for developing the electrostatic latent image; (iii) a spacer member for spacing between the charging device and the surface of the image bearing member, the spacer member being mounted between the image bearing member and the charging device; and (iv) a locking member for spacing between the developing device positioned in the developing position and the image bearing member, the locking member being demountably mounted between the drum cartridge and the rotary, and the locking member being is provided with a guide portion for guiding the spacer member between the image bearing member and the charging device. | 05-05-2011 |
20110142489 | ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS - An electrophotographic image forming apparatus includes a main assembly; a cartridge including process means actable on an electrophotographic photosensitive member, the process cartridge being detachably mountable relative to the main assembly; an opening, provided in the main assembly of the apparatus, for permitting mounting and demounting of the cartridge; an openable member, provided in the main assembly of the apparatus, for openably closing the opening; an exposure device, provided on the openable member, for exposing the electrophotographic photosensitive member; the cartridge including a first unit, and a second unit pivotably connected with the first unit; a first positioning portion provided in the main assembly of the apparatus, wherein the exposure device is provided with a second positioning portion for positioning between the exposure device and the second unit of the cartridge by engagement with the cartridge by closing the openable member. | 06-16-2011 |
20120148295 | IMAGE FORMING APPARATUS - An image forming apparatus has a tray, which is able to be drawn out of the apparatus and on which a plurality of cartridges of different sizes can be mounted. A cartridge, being the largest in size among a plurality of process cartridges, is detachably arranged at a location at which it is first exposed to outside when a cartridge tray is drawn out. A developer storage portion of the largest cartridge has the largest capacity and stores a developer of a black color. | 06-14-2012 |
20120201567 | PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS - A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, includes an electrophotographic photosensitive drum, a developing roller, a drum frame, a movable developing frame taking a position where the roller contacts the drum, and a force receiver having first and second force receivers for receiving first and second external forces. The second force receiver moves relative to the developing frame. The second force receiver takes a stand-by position retracted from an operating position when the first force receiver receives the first external force, and moves from the stand-by to the operating position for moving the developing frame from the contacting position to the spacing position. The distance the second force receiver moves from the stand-by to the operating position is larger than the distance the first force receiver moves by the first external force. | 08-09-2012 |
20120237280 | SHEET DETECTING APPARATUS AND IMAGE FORMING APPARATUS - A sheet detecting apparatus including: a sheet detecting member having a plurality of abutment surfaces in a peripheral direction thereof, the sheet detecting member being rotated by a conveyed sheet abutting against one of the plurality of abutment surfaces; a detection portion which operates in association with the sheet detecting member; a sensor which generates a signal based on a position of the detection portion; and an urging portion which generates an urging force for positioning the one of the plurality of abutment surfaces of the sheet detecting member in a waiting position in which the leading edge of a sheet conveyed by a conveying portion abuts against the one of the plurality of abutment surfaces, and thereafter the urging portion switching the urging force to an urging force for positioning, in the waiting position, another one of the plurality of abutment surfaces against which a succeeding sheet abuts. | 09-20-2012 |
20130108318 | PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS | 05-02-2013 |
20130243481 | PROCESS CARTRIGE AND ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS - A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, includes an electrophotographic photosensitive drum, a developing roller, a drum frame, a movable developing frame taking a position where the roller contacts the drum, and a force receiver having first and second force receivers for receiving first and second external forces. The second force receiver moves relative to the developing frame. The second force receiver takes a stand-by position retracted from an operating position when the first force receiver receives the first external force, and moves from the stand-by to the operating position for moving the developing frame from the contacting position to the spacing position. The distance the second force receiver moves from the stand-by to the operating position is larger than the distance the first force receiver moves by the first external force. | 09-19-2013 |
20130266336 | IMAGE FORMING APPARATUS - The intermediate transfer unit removably mounted to an apparatus main body of an image forming apparatus, includes a contact roller is disposed so as to come into contact with an intermediate transfer belt correspondingly to a photosensitive drum, an opposing member, and a voltage maintaining element which is connected to the opposing member and the contact roller. The number of electric contacts between the intermediate transfer unit and the apparatus main body is decreased so that the apparatus can be downsized, and its cost can be lowered. | 10-10-2013 |
20130266348 | IMAGE FORMING APPARATUS - The image forming apparatus includes a transfer rotary member for forming a primary transfer portion (N) between a photosensitive drum and an intermediate transfer belt. The transfer rotary member includes multiple rotary members whose diameters are different, into which the transfer rotary member is divided in a direction orthogonal to a moving direction of the intermediate transfer belt. The transfer rotary member is arranged so as to contact a surface of the intermediate transfer belt on a side opposite to a surface with which multiple photosensitive drums come into contact at the primary transfer portions (N), on a downstream side in the moving direction of the intermediate transfer belt with respect to a contact portion between the intermediate transfer belt and each photosensitive drum, the intermediate transfer belt being arranged so as to protrude on the photosensitive drum side. | 10-10-2013 |
20140178097 | PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS - A process cartridge includes an electrophotographic photosensitive drum and a developing roller for developing an electrostatic latent image formed on the electrophotographic photosensitive drum. The cartridge also includes a developing frame supporting the developing roller. A force receiving member is provided, with the force receiving member including a spacing force receiving portion movable relative to the developing frame to move between a first position and a second position in which the spacing force receiving portion is retracted from the first position toward an inside of the developing frame. | 06-26-2014 |
Patent application number | Description | Published |
20090162095 | PROCESS CARTRIDGE AND IMAGE FORMING APPARATUS - A process cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The cartridge includes an electrophotographic photosensitive drum, a developing roller, a drum unit containing the drum, a developing unit containing the roller and being movable so the roller contacts and is spaced from the drum, and a first force receiver receiving a force from a main-assembly first force applier by movement of a door from open to closed positions when mounting the cartridge and a second force receiver movable from a stand-by position by movement of the first force receiver by a force received from the first force applier. The second force receiver takes a projected position receiving a force from the second force applier to move the developing unit so the roller moves out of contact with the drum, the projected position being higher than the stand-by position. | 06-25-2009 |
20110110682 | PROCESS CARTRIDGE AND IMAGE FORMING APPARATUS - A process cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The cartridge includes an electrophotographic photosensitive drum, a developing roller, a drum unit containing the drum, a developing unit containing the roller and being movable so the roller contacts and is spaced from the drum, and a first force receiver receiving a force from a main assembly first force applier by movement of a door from open to closed positions when mounting the cartridge and a second force receiver movable from a stand-by position by movement of the first force receiver by a force received from the first force applier. The second force receiver takes a projected position receiving a force from the second force applier to move the developing unit so the roller moves out of contact with the drum, the projected position being higher than the stand-by position. | 05-12-2011 |
20120237252 | PROCESS CARTRIDGE AND IMAGE FORMING APPARATUS - A process cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The cartridge includes an electrophotographic photosensitive drum, a developing roller, a drum unit containing the drum, a developing unit containing the roller and being movable so the roller contacts and is spaced from the drum, and a first force receiver receiving a force from a main-assembly first force applier by movement of a door from open to closed positions when mounting the cartridge and a second force receiver movable from a stand-by position by movement of the first force receiver by a force received from the first force applier. The second force receiver takes a projected position receiving a force from the second force applier to move the developing unit so the roller moves out of contact with the drum, the projected position being higher than the stand-by position. | 09-20-2012 |
20130315622 | PROCESS CARTRIDGE AND IMAGE FORMING APPARATUS - A process cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The cartridge includes an electrophotographic photosensitive drum, a developing roller, a drum unit containing the drum, a developing unit containing the roller and being movable so the roller contacts and is spaced from the drum, and a first force receiver receiving a force from a main-assembly first force applier by movement of a door from open to closed positions when mounting the cartridge and a second force receiver movable from a stand-by position by movement of the first force receiver by a force received from the first force applier. The second force receiver takes a projected position receiving a force from the second force applier to move the developing unit so the roller moves out of contact with the drum, the projected position being higher than the stand-by position. | 11-28-2013 |
20150078780 | PROCESS CARTRIDGE AND IMAGE FORMING APPARATUS - A process cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The cartridge includes an electrophotographic photosensitive drum, a developing roller, a drum unit containing the drum, a developing unit containing the roller and being movable so the roller contacts and is spaced from the drum, and a first force receiver receiving a force from a main-assembly first force applier by movement of a door from open to closed positions when mounting the cartridge and a second force receiver movable from a stand-by position by movement of the first force receiver by a force received from the first force applier. The second force receiver takes a projected position receiving a force from the second force applier to move the developing unit so the roller moves out of contact with the drum, the projected position being higher than the stand-by position. | 03-19-2015 |