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...http://www.google.de/patents/US7860433?utm_source=gb-gplus-sharePatent US7860433 - Process cartridge and electrophotographic image forming apparatus
