| 摘要 |
A process cartridge is detachably attachable to the main body of an electrophotographic image forming apparatus having a laser beam applying member, a shutter for shutting off the optical path of a laser beam emitted from the laser beam applying member, a portion for moving the shutter to a retracted position retracted from a shutting-off position for shutting off the optical path, a main body frame provided upstream of the shutter with respect to the attachment direction of the process cartridge, and an opening portion provided in the main body frame. The cartridge includes an electrophotographic photosensitive drum, a process device for acting on the drum, and a cartridge abutting portion adapted, when the cartridge is to be attached to the main body of an apparatus functionally differing from the main body of the image forming apparatus, to abut against a main body frame provided on the main body of the functionally different apparatus to thereby block the attachment of the process cartridge.
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