Charging member, process cartridge using the same and electropho

Details Charging member, process cartridge using the same and electropho Charging member, process cartridge using the same and electropho

1995-12-19

1998-01-27

Beatty, Robert

Electrophotography

Image formation

Charging

G03G 1502

Patent

active

057130671

ABSTRACT:
A charging member for charging a charge-receiving member, such as an electrophotographic photosensitive member, by disposing the charging member in contact with the charge-receiving member and applying a voltage to the charging member is constituted by disposing an electroconductive support, an elastic layer, and a surface coating layer having a tensile modulus of above 2000 kgf/cm.sup.2 to at most 30000 kgf/cm.sup.2 in this order. The coating layer may preferably contain an acrylic polymer-modified urethane resin. The charging member is effective in providing the charge-receiving member with a nip portion showing a uniform electric resistance distribution for a long period to provide excellent images.

REFERENCES:
patent: 4810564 (1989-03-01), Takahashi et al.
patent: 5089851 (1992-02-01), Tanaka et al.
patent: 5172173 (1992-12-01), Goto et al.
patent: 5384626 (1995-01-01), Kugoh et al.

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