Electrophotographic photosensitive drum, process cartridge,...

Details Electrophotographic photosensitive drum, process cartridge,... Electrophotographic photosensitive drum, process cartridge,...

2006-12-27

2008-10-21

Tran, Hoan H (Department: 2852)

Electrophotography

Image formation

Photoconductive member

C399S117000

Reexamination Certificate

active

07440715

ABSTRACT:
An electrophotographic photosensitive drum is for a process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus. The main assembly includes a motor, and a gear having a non-circular twisted hole. The drum includes a cylinder having a non-circular twisted projection engageable with the hole to receive a driving force from the main assembly when the cartridge is mounted to the main assembly. A recess is formed in the projection and has a bottom portion and a side surface portion. When the projection receives a pulling force toward the hole by rotation of the gear with the projection and the hole being engaged with each other, the bottom portion contacts a spherical surface portion provided at a central portion of the hole, and the side surface portion contacts the spherical surface portion.

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