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RADIOACTIVE TONER DISCHARGE FOR IMPROVED BLADE CLEANING

IP.com Disclosure Number: IPCOM000022971D
Original Publication Date: 1976-May-31
Included in the Prior Art Database: 2004-Mar-27
Document File: 2 page(s) / 203K

Publishing Venue

Xerox Disclosure Journal

Abstract

Toner cleaned from a xerographic photoreceptor surface by an elastomeric insulative blade has been observed to electrically discharge by air breakdown as it collects at the blade edge. This discharge should be advantageous to the blade cleaning system since the lower charge on the toner should yield a lower adhesion force to the photo~ receptor surface. Thus, a procedure which would enhance toner discharge should make the blade cleaning system more efficient, particularly by incr~asingtoner discharge under high stress conditions, such as low relative humidity. The proposed system for increasing toner discharge com~ prises a conventional small radioactive source 1 placed just above the blade edge 2 to provide an increased supply of ions in the air at the blade edge. These ions would initiate air breakdown more readily as the toner is scraped, leading to a more uniform and more complete toner discharge. It would initiate breakdown at low relative humidity where normal discharge by air breakdown would otherwise be less likely.

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Page 1 of 2

XEROX DISCLOSURE JOURNAL

RADIOACTIVE TONER DISCHARGE FOR IMPROVED BLADE CLEANING Richard F. Koehier

Proposed Classification
tJ~S, Cl. 355/15
mt. Cl, G03g 21/00

Toner cleaned from a xerographic photoreceptor surface by
an elastomeric insulative blade has been observed to
electrically discharge by air breakdown as it collects at
the blade edge. This discharge should be advantageous to
the blade cleaning system since the lower charge on the
toner should yield a lower adhesion force to the photo~
receptor surface. Thus, a procedure which would enhance
toner discharge should make the blade cleaning system
more efficient, particularly by incr~asingtoner discharge
under high stress conditions, such as low relative humidity.
The proposed system for increasing toner discharge com~
prises a conventional small radioactive source 1 placed
just above the blade edge 2 to provide an increased supply
of ions in the air at the blade edge. These ions would
initiate air breakdown more readily as the toner is
scraped, leading to a more uniform and more complete toner
discharge. It would initiate breakdown at low relative
humidity where normal discharge by air breakdown would
otherwise be less likely.

Volume 1 Number 5 May 1976 93

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

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94 XEROX DISCLOSURE JOURNAL

Volume 1 Number 5 May 1976

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