Process cartridge, process cartridge assembly method, and electr

Electrophotography – Having particular structure – Modular or displaceable

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399119, G03G 1216

Patent

active

057747660

ABSTRACT:
A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus comprises an electrophotographic photosensitive drum, a development roller for developing a latent image formed on the electrophotographic photosensitive drum, a toner accommodating portion for accommodating toner to be used by the development roller for development, a photosensitive drum frame for supporting the electrophotographic photosensitive drum, a development frame including the toner accommodating portion, and a support frame including a first toner leakage preventing member positioned at one longitudinal end of the development roller and a second toner leakage preventing member positioned at the other longitudinal end of the development roller. The development frame and the support frame are rotatably connected about a positioning member and, in this connected state, a portion of the development frame is welded to a portion of the support frame so that the development frame and the support frame are joined together.

REFERENCES:
patent: 4931838 (1990-06-01), Ban et al.
patent: 5475467 (1995-12-01), Watanabe et al.
patent: 5543898 (1996-08-01), Shishido et al.
patent: 5550617 (1996-08-01), Odagawa et al.
patent: 5583618 (1996-12-01), Takeuchi et al.
patent: 5585895 (1996-12-01), Yashiro et al.

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