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US 4,134,763 AGranted
Selenium-base photosensitive materials for electrophotography having super-finished substrate
AssigneeRicoh Company, Ltd.
InventorsItaru Fujimura, Katutoshi Endo
Life of this patent
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Abstract
Selenium-base photosensitive materials for use in electrophotography wherein a photoconductive layer consisting essentially of selenium is formed on a substrate whose surface is made rougher by a super-finish method.
Claims9
Improvement in an electrophotographic element comprising an electrically conductive metal substrate having a surface coated with and completely covered by a photoconductive layer of photoconductive selenium or photoconductive selenium alloy, wherein the improvement consists of:
- the roughness of said surface of said substrate is in the range of from about 0.3 to about 2.0 microns and said surface of said substrate is free of long periodical undulations, said substrate having been prepared by superfinishing said surface of said substrate.
Dependencies are inferred from the claim text.