Patent ID: 6983115
Filing Date: 2006-01-03
Classification: G03G

Abstract:
1. A developing cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, said apparatus comprising: a frame; a developing device configured and positioned to develop an electrostatic latent image formed on an electrophotographic photosensitive member; a first projected portion, projected from said frame and configured and positioned to engage a first positioning portion provided in the main assembly of the apparatus when said developing cartridge is set in the main assembly of the apparatus to position said developing cartridge and around which said developing cartridge can rotate; a second projected portion, projected from said frame and configured and positioned to engage a second positioning portion provided in the main assembly of the apparatus when said developing cartridge is set in the main assembly of the apparatus to regulate rotation of said developing cartridge about said first positioning portion; and a cartridge guide member, projected from said frame and configured and positioned to contact to a main assembly guide portion provided in the main assembly of the apparatus to guide said developing cartridge when said developing cartridge is in the process of being mounted to the main assembly of the apparatus, wherein said cartridge guide member is urged to urge said second projected portion in a direction to contact said second projected portion to said second positioning portion when said developing cartridge is set in the main assembly of the apparatus.