| 摘要 |
A mounting and demounting mechanism for a process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, the process cartridge including an electrophotographic photosensitive member and a process means actable on the electrophotographic photosensitive member, and the electrophotographic image forming apparatus including a transfer roller for transferring an image onto a recording material, the mounting and demounting mechanism includes an opening through which the process cartridge is mounted and demounted; a cartridge mounting member for demountably mounting the process cartridge; a mounting member holding means for movably holding the cartridge mounting member a first position in which the process cartridge is detachably mountable and a second position in which the process cartridge is capable of image forming operation, wherein the cartridge mounting member is moved from the first position to the second position by the mounting member holding means, and the process cartridge is mounted in such a direction that electrophotographic photosensitive member is moved in a direction crossing with a nip formed between the electrophotographic photosensitive member and the transfer roller, and wherein the cartridge mounting member is moved from the second position to the first position by the mounting member holding means.
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