Photoreceptors, developing cartridge using the same, and...

Details Photoreceptors, developing cartridge using the same, and... Photoreceptors, developing cartridge using the same, and...

2006-04-21

2008-10-07

Gray, David M. (Department: 2852)

Electrophotography

Having particular structure

Modular or displaceable

C399S116000, C399S159000, C399S167000

Reexamination Certificate

active

07433628

ABSTRACT:
A developing cartridge and an image forming apparatus having a photoreceptor drum are provided. The photoreceptor drum includes a pair of sleeves having outer diameter units inserted into the ends of a cylindrical drum on which a photoconductive material layer is formed, inner diameter units to which shafts are rotatably coupled, and at least two protrusion units separated from each other in a length direction of the shafts and contacting the shafts by protruding from the inner diameter units. Accordingly, the location tolerance and the assembly tolerance of the photoreceptor drum can be reduced by only modifying the shape of the sleeves, without adding additional parts. As a result, printing defects such as voids and unevenness can be advantageously prevented, since the developing nip and developing gap are formed very uniformly.

REFERENCES:
patent: 5444516 (1995-08-01), Michlin et al.
patent: 5749028 (1998-05-01), Damji et al.
patent: 6771915 (2004-08-01), Cais et al.
patent: 6785489 (2004-08-01), Anderson, II
patent: 2004/0115548 (2004-06-01), Iizuka et al.
patent: 2001-235967 (2001-08-01), None
patent: 2004-028299 (2004-01-01), None

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