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Browse Prior Art Database

TRIBO CONTROLLED MECHANICAL BRUSH CLEANER

IP.com Disclosure Number: IPCOM000026870D
Original Publication Date: 1994-Feb-28
Included in the Prior Art Database: 2004-Apr-06
Document File: 4 page(s) / 137K

Publishing Venue

Xerox Disclosure Journal

Abstract

A method to control the tribo charge on a cleaner brush is proposed. It has been shown that the polarity of a triboelectric charge induced on a cleaner brush arises as a consequential effect, caused by the surface that it contacts. When a cleaner brush is negatively charged, good cleaning results. Conversely, when the cleaner brush is positively charged, cleaning failures occur,

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XEROX DISCLOSURE JOURNAL

TRIBO CONTROLLED Proposed Classification MECHANICAL BRUSH CLEANER U.S. C1.355/301 Clark V. Lange
Douglas
A. Lundy
Daniel
M. Bray

Int. C1. GL3g 21/00

XEROX DISCLOSURE JOURNAL - Vol. 19, No. 1 Januarymebruary 1994 59

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

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TRIBO CONTROLLED MECHANICAL BRUSH CLEANER(Cont'd)

A method to control the tribo charge on a cleaner brush is proposed. It has been shown that the polarity of a triboelectric charge induced on a cleaner brush arises as a consequential effect, caused by the surface that it contacts. When a cleaner brush is negatively charged, good cleaning results. Conversely, when the cleaner brush is positively charged, cleaning failures occur,

The poor cleaning characteristic of a positively charged brush is due to the repulsion between two like charges; one existing on the cleaner brush fiber, and the other on the toner particles entering the cleaner brush from a photoreceptor surface. During the preclean operation of a xerographic process, toner particles obtain a positive charge by electrostatic means.

Since the less surface the cleaner brush contacts governs its triboelectric charge, the charge on the cleaner brush can be controlled by either a flicker bar or an inner surface of the cleaner housing. The final choice of the charge mechanism depends upon the nominal setting of the brush tip to housing spacing. When the nominal setting for the brush tip to housing spacing is zero, some brush fibers are in contact with an arcuate region of the housing and some are not. Therefore, it is proposed to employ a flicker bar fabricated from an electronegative fluorocarbon material such as, for example, TEFLON@ and to coat a portion of the inner region of the housing with the same material. The coating, in the housing, can be sprayed on or applied in the form of an adhesive backed TEFLON@ tape.

Testing indicates that the flicker barhrush contact results in a negatively charged brush when black toner particles are present...