Patent application number | Description | Published |
20080240796 | ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS, DEVELOPING APPARATUS, AND COUPLING MEMBER - A developing device usable with an electrophotographic image forming apparatus includes a driving shaft having a rotating force applying portion, and a movable member. The developing device is mounted to the moving member and includes a developing roller, and a coupling member that includes a rotating force receiving portion and a rotating force applying portion. The coupling member is capable of taking (i) a rotational force transmitting angular position for transmitting the rotational force to the developing roller, (ii) a pre-engagement angular position taken before the coupling member is engaged with the rotating force applying portion, in which the coupling member is inclined away from the rotational force transmitting angular position, and (iii) a disengaging angular position, which enables the coupling member to disengage from the driving shaft, and inclines the coupling member away from the rotational force transmitting angular position, in a direction opposite to the pre-engagement angular position. | 10-02-2008 |
20080260428 | Rotational Force Transmitting Parts - A rotating force transmitting part for an electrophotographic photosensitive drum for a main assembly of the electrophotographic image forming apparatus, wherein the main assembly of the electrophotographic image forming apparatus includes a driving shaft, to be driven by a motor, having the rotating force applying portion, and wherein the electrophotographic photosensitive drum is dismountable from the main assembly of the electrophotographic image forming apparatus in a direction substantial perpendicular with an axial direction of the driving shaft, the rotating force transmitting part includes a coupling member engageable with the rotational force applying portion to receive a rotational force for rotating the electrophotographic photosensitive drum in the state in which electrophotographic photosensitive drum is mounted to the main assembly of the electrophotographic image forming apparatus, wherein the coupling member being capable of taking a rotational force transmitting angular position for transmitting the rotational force for rotating the electrophotographic photosensitive drum to the electrophotographic photosensitive drum and a disengaging angular position in which the coupling member is inclined away from the axis of the electrophotographic photosensitive drum from the rotational force transmitting angular position, wherein when the process cartridge is dismounted from the main assembly of the electrophotographic image forming apparatus in a direction substantially perpendicular to the axis of the electrophotographic photosensitive drum, the coupling member moves from the rotational force transmitting angular position to the disengaging angular position. | 10-23-2008 |
20090317129 | PROCESS CARTRIDGE AND ELECTROSTATIC IMAGE FORMING APPARATUS - A process cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus, which includes a rotating force applying portion. The cartridge includes an electrophotographic photosensitive drum, a developing roller, a first frame unit supporting the drum, a second frame unit supporting the roller and swingably connected with the first frame unit, a coupling, mounted to the drum, for receiving a rotating force for rotating the drum from the rotating force applying portion when the cartridge is mounted to the main assembly,first, second and third cartridge side portions to be positioned engageable respectively with first, second and third main assembly side positioning portions provided in the main assembly to regulate movement of the first frame unit in a longitudinal direction of the drum or to position the drum in a radial direction when the cartridge is mounted to the main assembly, and first unit side and drum side regulating portions. | 12-24-2009 |
20090317131 | PROCESS CARTRIDGE AND ELECTROGRAPHIC PHOTOSENSITIVE DRUM UNIT - A process cartridge usable with an electrophotographic image forming apparatus, the process cartridge includes i) an electrophotographic photosensitive drum rotatable about an axis and having a photosensitive layer at its peripheral surface; ii) process means actable on the drum; iii) a coupling member for receiving an external force for rotating the drum, wherein the coupling member is capable of taking a first angular position for transmitting the external force to the drum, a second angular position inclined away from the axis of the drum from the first angular position, and a third angular position away from the axis of the drum from the first angle position; and iv) a regulating portion for regulating an inclination angle of the coupling member such that downward inclination angle of the coupling member is smaller than an inclination angle of the coupling member when the coupling member is at the second angular position. | 12-24-2009 |
20090317132 | PROCESS CARTRIDGE, ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS AND ELECTROGRAPHIC PHOTOSENSITIVE DRUM UNIT - A process cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus including a driving shaft having a rotational force applying portion by moving in a direction substantially perpendicular to an axis of the driving shaft. The cartridge includes an electrophotographic photosensitive drum, a coupler engageable with the rotational force applying portion to receive a rotational force for rotating the drum and taking transmitting, pre-engagement, and disengaging positions, and a regulator regulating an inclination angle of the coupler. During cartridge mounting, the coupler moves from the pre-engagement to the transmitting position to oppose the driving shaft, and during cartridge dismounting, the coupler moves from the transmitting to the disengaging position to disengage from the driving shaft. | 12-24-2009 |
20100221036 | CARTRIDGE AND ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS - A cartridge mountable and dismountable by moving in the direction crossing with an axial direction of the drive shaft of a main assembly of the apparatus, includes a rotatable member rotatable by receiving a rotational force from the apparatus; a coupling engageable with the rotational force applying portion to receive a force for rotating said rotatable member, said coupling including a coupling member rotatable about an axis, a first rotational force receiving portion, provided at one end portion of said coupling member, for receiving the rotational force from the driving shaft, a rotational force transmission member engaged with the other end portion of said coupling member and having opposite ends projected out in a crossing wherein said coupling member is pivotable between a transmitting angular position for transmitting the rotational force from the driving shaft to said rotatable member and a mounting-and-dismounting angular position which is inclined relative to the axis of said rotatable member; a flange mounted to said rotatable member and rotatable about an axis, said flange including an opening accommodating said transmission member with a gap, a regulating portion, provided in said opening, for regulating movement of said transmission member in the crossing direction when said coupling takes the transmitting angular position, a second rotational force receiving portion for being abutted by said transmission member to receive the rotational force from said coupling, an opposing portion opposing to said second receiving portion, wherein in a state that said coupling is in the transmitting angular position and that one end of said transmission member contacts to said regulating portion to be confined in movement, when said coupling inclines relative to said flange such that a side in which a projection distance of said rotational force transmission member is relatively smaller moves away from said first receiving portion, an engagement depth between said side of said transmission member and said second receiving portion and an engagement depth between said side of said transmission member and said opposing portion are larger than zero. | 09-02-2010 |
20110038649 | CARTRIDGE, AND ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS WHICH USES CARTRIDGE - A cartridge for use with a main assembly of an electrophotographic image forming apparatus, the main assembly including a driving shaft having a rotational force applying portion, wherein the cartridge is dismountable from the main assembly in a direction substantially perpendicular to an axial direction of the driving shaft, the cartridge including i) a developing roller for developing an electrostatic latent image formed on an electrophotographic photosensitive drum, the developing roller being rotatable about an axis thereof; and ii) a coupling member engageable with the rotational force applying portion to receive a rotational force for rotating the developing roller, the coupling member being capable of taking a rotational force transmitting angular position for transmitting the rotational force for rotating the developing roller to the developing roller and a disengaging angular position in which the coupling member is inclined away from the rotational force transmitting angular position, wherein when the cartridge is dismounted from the main assembly of the electrophotographic image forming apparatus in a direction substantially perpendicular to the axis of the developing roller, the coupling member moves from the rotational force transmitting angular position to the disengaging angular position. | 02-17-2011 |
20110091239 | PROCESS CARTRIDGE, ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS, AND ELECTROPHOTOGRAPHIC PHOTOSENSITIVE DRUM UNIT - A process cartridge for use in an electrophotographic image forming apparatus. The process cartridge includes an electrophotographic photosensitive drum having a photosensitive layer at a peripheral surface thereof, with the electrophotographic photosensitive drum being rotatable about an axis thereof. The process cartridge also includes a coupling member to receive a rotational force for rotating the electrophotographic photosensitive drum, with the coupling member capable of taking a rotational force transmitting angular position for transmitting the rotational force to the electrophotographic photosensitive drum. The coupling member is also capable of taking a disengaging angular position in which the coupling member is inclined away from the rotational force transmitting angular position. | 04-21-2011 |
20120121290 | PROCESS CARTRIDGE, ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS AND ELECTROPHOTOGRAPHIC PHOTOSENSITIVE DRUM UNIT - A process cartridge comprises a photosensitive drum, a developing roller, and a coupling member. The coupling member is capable of inclining relative to the photosensitive drum such that the coupling axis inclines relative to the drum axis. A regulating portion surrounds the coupling member so as to confine the range of inclination of the coupling member. The regulating portion is provided with a recess that recesses in a direction away from the drum axis and away from the developing roller. An angle between the coupling axis and the drum axis is larger when at least a part of the coupling member is in the recess than when the coupling member contacts another portion of the regulating portion. | 05-17-2012 |
20120201566 | PROCESS CARTRIDGE AND ELECTROSTATIC IMAGE FORMING APPARATUS - A process cartridge comprises an electrophotographic photosensitive drum and a developing roller. A coupling member is provided that receives a rotating force for rotating the electrophotographic photosensitive drum and transmits the rotating force to the electrophotographic photosensitive drum through a drum flange. The drum flange has (i) a first regulated portion capable of being regulated by a first regulating portion, (ii) a second regulated portion capable of being regulated by a second regulating portion, (iii) a connecting portion that is connected with the coupling member so that a rotational axis of the coupling member is inclineable relative to a rotational axis of the drum flange, and (iv) a gear portion that transmits the rotational force from the coupling member to the developing roller. | 08-09-2012 |
20130064569 | PROCESS CARTRIDGE ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS, AND ELECTROPHOTOGRAPHIC PHOTOSENSITIVE DRUM UNIT - A process cartridge for use with a main assembly of an electrophotographic image forming apparatus. The process cartridge includes an electrophotographic photosensitive drum having a photosensitive layer, and a process means actable on the electrophotographic photosensitive drum. The process cartridge also includes a coupling member for receiving a rotational force for rotating the electrophotographic photosensitive drum. | 03-14-2013 |
20130071141 | ROTATIONAL FORCE TRANSMITTING PART - A device for transmitting a rotational force to an electrophotographic photosensitive drum. The device includes a flange connectable with the drum. A coupling member is provided with a rotational force transmitting portion engageable with the flange. | 03-21-2013 |
20130164031 | ROTATIONAL FORCE TRANSMITTING PART - An electrophotographic photosensitive drum unit includes a cylinder having a photosensitive layer at an outer periphery thereof. A drum flange is provided at one end of the cylinder, with the drum flange including a plurality of projections provided inside of the drum flange and projected radially inwardly of the drum flange, and with a space diametrically between the projections. A radially inner part of each projection has an overhang. | 06-27-2013 |
20130177335 | PROCESS CARTRIDGE, ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS AND ELECTROPHOTOGRAPHIC PHOTOSENSITIVE DRUM UNIT - A process cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The process cartridge includes a coupling member provided at an axial end portion of a photosensitive drum and rotatable about a coupling axis thereof so as to transmit a driving force to the photosensitive drum. The coupling member is capable of inclining relative to the photosensitive drum so that the coupling axis inclines relative to a drum axis, with the coupling member having a first end portion connected to the photosensitive drum, a second end portion, and a connecting portion between the first end portion and the second end portion. A maximum distance from the coupling axis to an outermost surface of the connecting portion along a line perpendicular to the coupling axis is less than a maximum distance from the coupling axis to an outermost surface of the second end portion along a line perpendicular to the coupling axis. | 07-11-2013 |
20130216275 | ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS, DEVELOPING APPARATUS, AND COUPLING MEMBER - A developing device usable with an electrophotographic image forming apparatus. The developing device includes a developing roller for developing an electrostatic latent image formed on an electrophotographic photosensitive drum. The developing device also includes a coupling member for transmitting a rotating force to the developing roller. The coupling member includes a rotating force receiving portion engageable with a rotating force applying portion to receive a rotating force from a driving shaft, and a rotating force transmitting portion for transmitting the rotating force received through the rotating force receiving portion to the developing roller. | 08-22-2013 |
20130287437 | CARTRIDGE, AND ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS WHICH USES CARTRIDGE - A cartridge for use with a main assembly of an electrophotographic image forming apparatus, the cartridge being dismountable from the main assembly and including (i) a developing roller for developing an electrostatic latent image formed on an electrophotographic photosensitive drum, the developing roller being rotatable about an axis thereof; and (ii) a coupling member capable of taking a rotational force transmitting angular position for transmitting a rotational force for rotating the developing roller to the developing roller and a disengaging angular position in which the coupling member is inclined away from the rotational force transmitting angular position. | 10-31-2013 |
20130336674 | PROCESS CARTRIDE AND ELECTROSTATIC IMAGE FORMING APPARATUS - An electrophotographic photosensitive drum includes a cylinder having a photosensitive layer formed thereon, with the cylinder being rotatable about an axis thereof. A drum flange is provided at a longitudinal end of the cylinder, with the drum flange including (i) a gear encircling a peripheral portion of the drum flange, (ii) a hollow portion, provided inside of the drum flange having an opening disposed on a side of the drum flange opposite from the cylinder, and (iii) a rim provided between the gear and the cylinder in a longitudinal direction of the cylinder and projected more radially-outward of the drum flange than a peripheral portion of the cylinder. | 12-19-2013 |
20140056613 | PROCESS CARTRIDGE, ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS, AND ELECTROPHOTOGRAPHIC PHOTOSENSITIVE DRUM UNIT - A process cartridge for use with a main assembly of an electrophotographic image forming apparatus, the main assembly including a driving shaft, to be driven by a motor, having a rotational force applying portion, wherein the process cartridge is dismountable from the main assembly in a direction substantially perpendicular to an axial direction of the driving shaft, the process cartridge includes i) an electrophotographic photosensitive drum having a photosensitive layer at a peripheral surface thereof, the electrophotographic photosensitive drum being rotatable about an axis thereof; ii) process means actable on the electrophotographic photosensitive drum; iii) a coupling member engageable with the rotational force applying portion to receive a rotational force for rotating the electrophotographic photosensitive drum, the coupling member being capable of taking a rotational force transmitting angular position for transmitting the rotational force for rotating the electrophotographic photosensitive drum to the electrophotographic photosensitive drum and a disengaging angular position in which the coupling member is inclined away from the axis of the electrophotographic photosensitive drum from the rotational force transmitting angular position, wherein when the process cartridge is dismounted from the main assembly of the electrophotographic image forming apparatus in a direction substantially perpendicular to the axis of the electrophotographic photosensitive drum, the coupling member moves from the rotational force transmitting angular position to the disengaging angular position. | 02-27-2014 |
20140064783 | ROTATIONAL FORCE TRANSMITTING PART - A rotating force transmitting part for an electrophotographic photosensitive drum for a main assembly of the electrophotographic image forming apparatus. The rotating force transmitting part includes a coupling member engageable with the rotational force applying portion to receive a rotational force for rotating the electrophotographic photosensitive drum in the state in which electrophotographic photosensitive drum is mounted to the main assembly of the electrophotographic image forming apparatus, wherein the coupling member being capable of taking a rotational force transmitting angular position for transmitting the rotational force for rotating the electrophotographic photosensitive drum to the electrophotographic photosensitive drum and a disengaging angular position in which the coupling member is inclined away from the axis of the electrophotographic photosensitive drum from the rotational force transmitting angular position. | 03-06-2014 |
20140086634 | ROTATIONAL FORCE TRANSMITTING PART - An electrophotographic photosensitive drum unit includes (a) a cylinder having a photosensitive layer at an outer periphery thereof and (b) a drum flange provided at one end of the cylinder, with the drum flange including at least two projections provided inside of the drum flange and projected radially inwardly of the drum flange, and with a space diametrically between the two projections. Each of the two projections projects radially inwardly of the drum flange to a greater extent at a position farther from the cylinder than it does at a position closer to the cylinder. | 03-27-2014 |
20140099144 | PROCESS CARTRIDGE, ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS, AND ELECTROPHOTOGRAPHIC PHOTOSENSITIVE DRUM UNIT - A process cartridge includes a casing, a photosensitive drum having an axis L | 04-10-2014 |
20140112686 | PROCESS CARTRIDGE, ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS AND ELECTROPHOTOGRAPHIC PHOTOSENSITIVE DRUM UNIT - A process cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The process cartridge includes a coupling member engageable with a rotational force applying portion to receive a rotational force. The coupling member is capable of taking a rotational force transmitting angular position for transmitting the rotational force, a pre-engagement angular position in which the coupling member is inclined away from the axis from the rotational force transmitting angular position, and a disengaging angular position in which the coupling member is inclined away from the axis from the rotational force transmitting angular position. | 04-24-2014 |
20140147168 | ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS, DEVELOPING APPARATUS, AND COUPLING MEMBER - A developing device usable with an electrophotographic image forming apparatus, the apparatus including a driving shaft rotatable by a motor and having a rotating force applying portion, and a movable member, the developing device being mountable to the movable member, and the developing device being movable in a direction substantially perpendicular to an axial direction of the driving shaft in response to movement of the movable member in one direction with the developing device mounted to the movable member, the developing device includes i) a developing roller for developing an electrostatic latent image formed on an electrophotographic photosensitive drum, the developing roller being rotatable about an axis; and ii) a coupling member for transmitting a rotating force to the developing roller, the coupling member including, a rotating force receiving portion engageable with the rotating force applying portion to receive a rotating force from the driving shaft, and a rotating force transmitting portion for transmitting the rotating force received through the rotating force receiving portion to the developing roller, the coupling member being capable of taking a rotational force transmitting angular position for transmitting the rotational force for rotating the developing roller to the developing roller, a pre-engagement angular position which is taken before the coupling member is engaged with the rotating force applying portion and in which the coupling member is inclined away from the rotational force transmitting angular position, and a disengaging angular position which is taken for the coupling member to disengage from the driving shaft and in which the coupling member is inclined away from the rotational force transmitting angular position in a direction opposite to the pre-engagement angular position; wherein in response to a movement of the developing device when the movable member moves in the one direction, the coupling member moves from the pre-engagement angular position to the rotational force transmitting angular position to be opposed to the driving shaft, and wherein when the movable member makes a further movement in the one direction from a position where the coupling member is opposed to the driving shaft, in response to the further movement, the coupling member is disengaged from the driving shaft by moving from the rotational force transmitting angular position to the disengaging angular position. | 05-29-2014 |