Patent ID: 8639158
Filing Date: 2014-01-28
Classification: G03G

Abstract:
1. A color electrophotographic image forming apparatus for forming a color image on a recording material, comprising: a plurality of electrophotographic photosensitive drums; a plurality of cartridges each including a force receiving portion and a developing roller for developing an electrostatic latent image formed on said electrophotographic photosensitive drum, an image forming unit for detachably mounting said plurality of cartridges, said image forming unit being movable between a mounting and demounting position for mounting and demounting said plurality of cartridges and an image forming position where an image forming operation is capable; and a plurality of urging members for applying forces to said force receiving portions, respectively, to urge said plurality of cartridges, respectively, wherein said plurality of cartridges are limited in movement to an outside of said image forming unit by said plurality of urging members, respectively, when said image forming unit moves between the image forming position and the mounting and demounting position, wherein an urging direction of said plurality of urging members crosses with a mounting direction in which said plurality of cartridges is mounted to said image forming unit, wherein each of said plurality of cartridges further includes a portion-to-be-guided to be guided in mounting said cartridge, said portion-to-be-guided being provided between said developing roller and said force receiving portion with respect to the mounting direction, and wherein said force receiving portion urges said developing roller to a respective one of said plurality of electrophotographic photosensitive drums by a moment produced about said portion-to-be-guided by said urging member.