Process cartridge having guide projections and image forming apparatus using same

An electrophotographic image forming apparatus for forming an image on a recording material, to which apparatus a process cartridge is detachably mountable to a main assembly of the image forming apparatus, comprising:

• a) a movable member retractable from the main assembly of the image forming apparatus, wherein a process cartridge is detachably mountable to said movable member, said process cartridge including:
• an electrophotographic photosensitive member;
• a cleaning member for removing toner from said electrophotographic photosensitive member;
• a toner feeding portion for feeding by a toner feeding member toner removed from said electrophotographic photosensitive member by said cleaning member;
• a cartridge frame supporting at least said electrophotographic photosensitive member;
• a first projection, projecting outwardly substantially coaxially with said electrophotographic photosensitive member, and provided on one end surface of said cartridge frame, as seen in a mounting direction when said process cartridge is mounted to the main assembly of the image forming apparatus;
• a second projection, projected outwardly substantially coaxially with said first projection, and provided on the other end surface of said cartridge frame;
• a third projection projecting outwardly at a position upstream of said first projection with respect to the mounting direction;
• and
• a fourth projection projected outwardly substantially coaxially with said third projection;
• wherein said first and second projections are placed at predetermined positions in the main assembly of said image forming apparatus;
• wherein said third and fourth projections are disposed so as to regulate rotation of said process cartridge about said first and second projections;
• and
• wherein said first, second, third and fourth projections function as guiding members when said process cartridge is mounted to or demounted from the movable member;
• said apparatus further comprising:
• b) an inserting portion for said movable member;
• c) an engaging member, provided in the main assembly and functioning as a positioning member to which said first and second projections are abutted when said movable member is inserted into the main assembly of the image forming apparatus;
• and
• d) feeding means for feeding the recording material.