Electrophotographic image forming apparatus, process cartridge, and drive mount for photosensitive drum

  • US 6,336,018 B1
  • Filed: 09/26/1997
  • Issued: 01/01/2002
  • Est. Priority Date: 09/26/1996
  • Status: Expired due to Term
First Claim
Patent Images

1. A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, wherein said main assembly includes a motor, a driving rotatable member for receiving driving force from said motor, and a hole defined by twisted surfaces, said hole being substantially coaxial with said driving rotatable member, said process cartridge comprising:

  • an electrophotographic photosensitive drum;

    process means actable on said photosensitive drum; and

    a projection provided at a longitudinal end of said photosensitive drum, wherein said projection has an engaging portion for engagement with the twisted surfaces and a supporting portion for supporting said engaging portion, and said supporting portion is capable of entering said hole, and wherein when said driving rotatable member rotates with said hole and said engaging portion of said projection engaged with each other, rotational driving force is transmitted from said driving rotatable member to said photosensitive drum through engagement between said hole and said projection, and said projection is urged inwardly of said hole.

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