Ion conductive roller and image forming apparatus employing...

Details Ion conductive roller and image forming apparatus employing... Ion conductive roller and image forming apparatus employing...

2007-03-06

2007-03-06

Shrivastav, Brij B. (Department: 2859)

Electrophotography

Image formation

Exposure

C399S280000

Reexamination Certificate

active

10807105

ABSTRACT:
An image forming apparatus includes a movable member; a roller contacted to the movable member, the roller having an elastic layer contacted to the movable member, the elastic layer having an ion electroconductivity and having a hardness of not less than 20° and not more than 50°, wherein the hardness and a density of the elastic layer satisfy (hardness/density)≧65, wherein the hardness is an Asker-C hardness of a material of the elastic layer cut out into a thickness of 4.0 mm under a weight of 500 g applied to the material.

REFERENCES:
patent: 6335133 (2002-01-01), Nagasaka
patent: 6337165 (2002-01-01), Fujii et al.
patent: 6806009 (2004-10-01), Tanaka et al.
patent: 6873816 (2005-03-01), Akashi et al.
patent: 2004/0131373 (2004-07-01), Saito et al.
patent: 11-109770 (1999-04-01), None
English Translation of Japanese Patent Appln. Publication No. JP 11-109770 Hiroko et al.).

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