Process cartridge and electrostatic image forming apparatus

Details Process cartridge and electrostatic image forming apparatus Process cartridge and electrostatic image forming apparatus

1998-10-22

2000-06-20

Chen, Sophia S.

Electrophotography

Having particular structure

Modular or displaceable

399111, G03G 1500, G03G 2118

Patent

active

060787643

ABSTRACT:
A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus includes a cartridge frame; an electrophotographic photosensitive member; a process device actable on the photosensitive member; a shutter for covering a portion of the photosensitive member which is otherwise exposed; a shutter supporting member for supporting the shutter on the cartridge frame, for movement between a protecting position for covering the photosensitive member to protect it and a retracted position for permitting the photosensitive member to be exposed; a force receiving portion for receiving, when the process cartridge is mounted to the main assembly of the image forming apparatus, a force for urging the shutter supporting member longitudinally inwardly of the process cartridge, wherein the force receiving portion is contactable to the main assembly when the process cartridge is mounted to the main assembly; and a stopper for limiting movement of the shutter supporting member beyond a predetermined distance to prevent the shutter member from disengaging from the cartridge frame, when the shutter supporting member moves in the longitudinal direction of the shutter.

REFERENCES:
patent: 4462677 (1984-07-01), Onoda
patent: 4609276 (1986-09-01), Mitzutani
patent: 4708455 (1987-11-01), Kubota et al.
patent: 5589918 (1996-12-01), Oshida et al.
patent: 5617579 (1997-04-01), Yashiro et al.
patent: 5749027 (1998-05-01), Ikemoto et al.
patent: 5878304 (1999-03-01), Watanabe et al.
patent: 5937242 (1999-08-01), Yokoyama et al.

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