Roll including foam body and method of producing the roll

Details Roll including foam body and method of producing the roll Roll including foam body and method of producing the roll

1993-11-10

2000-08-01

Copenheaver, Blaine

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

355274, 428 368, 428 3691, 4283044, B32B 108

Patent

active

060963956

ABSTRACT:
A charging roll including a center shaft, a foam layer formed on an outer circumferential surface of the center shaft, an electrically conductive elastic layer formed on an outer surface of the foam layer, and a resistance adjusting layer and a protective layer formed by coating on an outer surface of the electrically conductive elastic layer. The foam layer is an electrically conductive foam body or a foam body a part of which is made electrically conductive. A method of producing a composite roll, such as the above charging roll, which includes a foam layer formed on a shaft, and a solid elastic layer formed on the foam layer, includes the step of forming multiple minute grooves in an outer circumferential surface of a pre-foam tube which gives the foam layer, or an inner circumferential surface of an elastic tube which gives the solid elastic layer.

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Database WPI, Week 9038, Derwent Publications Ltd., London, DB; AN 90-286911 & JP-A-2 202 430 (Tokai Rubber) Aug. 10, 1992.
Patent Abstracts of Japan, vol. 16, No. 556 (C-1007) Nov. 26, 1992 & JP-A-04 216 834 (Bridgestone) Aug. 6, 1992.
Patent Abstracts of Japan, vol. 16, No. 424 (P-1415) Sep. 7, 1992 & JP-A-04 143 769 (Seiko Epson) May 18, 1992.

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