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ELIMINATION OF THE PEPPERSPOT PROBLEM BY SUPERFINAL FINISHING THE ALUMINUM DRUMS

IP.com Disclosure Number: IPCOM000023295D
Original Publication Date: 1977-Jun-30
Included in the Prior Art Database: 2004-Mar-29

Publishing Venue

Xerox Disclosure Journal

Abstract

A method for preventing "pepperspots" from being formed on metallic substrates, e.g., drums, coated with a photoreceptor, e.g., selenium or selenium alloys, used in Xerographic copiers. "Pepperspots" result in dark discharge spots being printed out as black spots of approximately 20 microns in size or larger, on copies made on these substrates, e.g., drums. The method comprises treating the metallic substrates, e.g., aluminum drums, with a finishing process called "superfina". "Superfina" is a finishing process, i.e., micro-stoning,which improves the smoothness of a surface. Specifically, drums which were coated with selenium alloys were "superfina" treated and tested in a xerographic machine. The drums did not show "pepperspotting".