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ELIMINATION OF THE PEPPERSPOT PROBLEM BY SUPERFINA-FINISHING THE ALUMINUM DRUMS

IP.com Disclosure Number: IPCOM000023217D
Original Publication Date: 1977-Feb-28
Included in the Prior Art Database: 2004-Mar-29
Document File: 2 page(s) / 194K

Publishing Venue

Xerox Disclosure Journal

Abstract

A method is proposed for preventing "pepperspots" from being formed on xerographic drums, resulting in dark discharge spots being printed out as black spots of 20 microns in size or larger, on copies made on these drums. The method corn-prises treating the aluminum drums with a finishing process called "superfina". dSuperfinaH is a finishing process, i.e., micro-stoning, which improves the smoothness of a surface. Specifically, drums which were coated with a selenium alloy were "superfina"-treated and tested in a xerographic copying machine. The drums did not show "pepper-spotting" while regular drums, which were not "superfina"- treated, did show "pepperspotting".

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Page 1 of 2

XEROX DISCLOSURE JOURNAL

ELIMINATION OF THE PEPPERSPOT Proposed Classification
PROBLEM BY
uSUPERFINA~FINISHING u.s. ci. 96/i..5
THE ALUMINUM DRUMS Into Ci. G03c 5/04
Heinz W~ Pinsler

A method is proposed for preventing "pepperspots" from being
formed on xerographic drums, resulting in dark discharge
spots being printed out as black spots of 20 microns in size
or larger, on copies made on these drums. The method corn~
prises treating the aluminum drums with a finishing process
called "superfina". dSuperfinaH is a finishing process,
i.e., micro~stoning, which improves the smoothness of a
surface. Specifically, drums which were coated with a
selenium alloy were "superfina"~treated and tested in a
xerographic copying machine. The drums did not show "pepper~
spotting" while regular drums, which were not "superfina"-~
treated, did show "pepperspotting".

Volume 2 Number 1 January/February 1977 3

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Page 2 of 2

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[This page contains 1 picture or other non-text object]