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PROCESS FOR REDUCING OVERTONING OF COPIES AT INITIAL STARTUP

IP.com Disclosure Number: IPCOM000023682D
Original Publication Date: 1978-Oct-31
Included in the Prior Art Database: 2004-Mar-31
Document File: 2 page(s) / 188K

Publishing Venue

Xerox Disclosure Journal

Abstract

Some photocopies exhibit an overtoning during initial (morn-ing) start-updue to decrease in the triboelectric charge Q of the developer during the previous unused period, One proposed remedy is to compensate for a lower Q by initially reducing the photoreceptor charge from its normal value, Less toner would then be attracted to and developed on the charged photo-receptor surface, As the Q of the developer rises due to normal copier activity, the photoreceptor charge could be gradually increased until normal operation levels are reached,

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XEROX DISCLOSURE JOURNAL

PROCESS FOR REDUCING OVERTONING Proposed Classification
OF COPIES AT INITIAL STARTUP U,S. Cl, 355/3DD
Jeng~Nan Shiau Int, Cl. G03g 15/00
Peter M, Tolliver

Some photocopies exhibit an overtoning during initial (morn~
ing) start~updue to decrease in the triboelectric charge Q of
the developer during the previous unused period, One proposed
remedy is to compensate for a lower Q by initially reducing
the photoreceptor charge from its normal value, Less toner
would then be attracted to and developed on the charged photo~
receptor surface, As the Q of the developer rises due to
normal copier activity, the photoreceptor charge could be
gradually increased until normal operation levels are reached,

A second remedy is to initially increase the bias roll vol-~
tage, thereby removing more of the developed toner from the
photoreceptor surface before it is transferred onto the paper
for fusing, The higher bias roll voltage would similarly be
slowly restored to its normal operating level,

Volume 3 Number 5 September/October 1978 345

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                 XEROX DISCLOSURE JOURNAL
346 Volume 3 Number 5 September/October 1978

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