Stock material or miscellaneous articles – Hollow or container type article – Polymer or resin containing
Patent
1997-03-20
1999-05-04
Chapman, Mark
Stock material or miscellaneous articles
Hollow or container type article
Polymer or resin containing
428 3691, 428 358, 428457, 492 53, 492 56, 399333, G03G 1520
Patent
active
059002956
ABSTRACT:
A fixing roller for an electrophotographic device has a cylindrical-shaped metallic base body, an insulation layer formed on an outer peripheral surface of the cylindrical-shaped metallic base body, and a resistance resin layer laminated on the insulation layer. The resistance resin layer is prepared using an injection-molding technique in which a die having a side gate structure is used as a resin-molding die. A major constituent of the resistance resin layer is selected from a polyphenylene sulfide resin, a polyphthalamide resin, and a liquid crystal polymer resin. In addition, the resistance resin layer also contains a mixture of carbon black and carbon fiber. Thus, the resistance resin layer has a specific volume resistance of 2 .OMEGA.cm or less in a direction along a central line of the cylindrical-shaped metallic base body. Both ends of the resistance resin layer are concentrically connected to ring-shaped metallic electrodes. Furthermore, the insulating layer is comprised of the same resin as that of the resistance resin layer.
REFERENCES:
patent: 5724637 (1998-03-01), Senba et al.
Chapman Mark
Frank Robert J.
Fuji Electric & Co., Ltd.
Sartori Michael A.
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