The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 12, 1993
Filed:
Aug. 14, 1990
Fuminori Ishikawa, Hitachiota, JP;
Akira Sato, Takahagi, JP;
Kunihiro Tamahashi, Mito, JP;
Masatoshi Wakagi, Hitachi, JP;
Katsumi Tamura, Hitachi, JP;
Masanobu Hanazono, Mito, JP;
Mitsuyoshi Shoji, Ibaraki, JP;
Takayuki Nakakawaji, Hitachi, JP;
Yutaka Ito, Takahagi, JP;
Shigeki Komatsuzaki, Mito, JP;
Motoo Akagi, Tokyo, JP;
Masaaki Imamura, Odawara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An electrophotographic photoreceptor comprising a photoconductive layer comprising a photoconductor, a support for the photoconductive layer and a surface layer formed on the photoconductive layer and comprising a curable resin film and an inorganic insulator pieces having a size larger than the film thickness of the curable resin film. In order to prevent the image blurring of an a-Si:H photoreceptor, on the outermost surface of the photoreceptor was formed a surface layer having a structure in which inorganic insulator pieces have protruded from the curable resin film. Since the curable resin is of high resistance and shows no quality change by corona irradiation, and besides the protruding inorganic insulator pieces prevent the abrasion of the resin, the surface layer having a long life and excellent humidity resistance, durability for corona irradiation and abrasion resistance can be realized. Further, by covering the surface layer with a fluorine-containing lubricant, the surface layer having a low friction coefficient and excellent cleaning characteristics is obtained, and besides the resin constituting the surface layer absorbs little moisture. As a result, it becomes possible to use the a-Si:H photoreceptors without a heater. Also, the surface layer of the present invention can be removed and then re-formed.