Charging roller, and process cartridge and image-forming apparat

Details Charging roller, and process cartridge and image-forming apparat Charging roller, and process cartridge and image-forming apparat

1995-11-22

2000-04-18

Grimley, Arthur T.

Electrophotography

Image formation

Charging

361221, G03G 1502

Patent

active

060525495

ABSTRACT:
A charging roller is set in contact with a chargeable member to charge the chargeable member by application of voltage. The charging roller has an electroconductive support, an elastic layer formed thereon, and at least one coating layer formed on the elastic layer. The charging roller has surface roughness of not more than 8 .mu.m, and Asker C hardness (A) of the elastic layer, and micro-rubber hardness (B) of the charging roller satisfy the relations below:

REFERENCES:
patent: 5089851 (1992-02-01), Tanaka et al.
patent: 5235386 (1993-08-01), Yano et al.
patent: 5471285 (1995-11-01), Nagase et al.
patent: 5499078 (1996-03-01), Kurokawa et al.
patent: 5543899 (1996-08-01), Inami et al.
patent: 5567494 (1996-10-01), Ageishi et al.
patent: 5610691 (1997-03-01), Takahashi et al.
patent: 5619311 (1997-04-01), Kurokawa et al.

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