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ELECTROSTATIC CLEANER SUBSYSTEM WITH IMPROVED CLEANING LATITUDE

IP.com Disclosure Number: IPCOM000026402D
Original Publication Date: 1991-Oct-31
Included in the Prior Art Database: 2004-Apr-05
Document File: 2 page(s) / 83K

Publishing Venue

Xerox Disclosure Journal

Abstract

In a xerographic system having a single electrostatic brush (ESB) cleaner, for example the system disclosed in U.S. Patent No. 4,252,433 issued to Sullivan, it has been determined that the cleaning latitude of the ESB subsystem is dependent upon the pile mass of the untransferred or residual toner remaining on the photoreceptor as it enters the cleaning subsystem. While toner charge and charge distribution are two factors which affect the performance of the cleaning subsystem, it is high pile masses which adversely influence both of these factors and result in a high stress condition for the single ESB cleaners. It is believed that as high pile masses, made up of multiple toner layers, pass under the preclean corotron, the uppermost toner layers block the lower layers from being properly charged to enable electrostatic cleaning. The result is that only the uppermost portion of the pile mass is appropriately charged and subsequently removed, while the remainder can pass through the cleaning subsystem and contaminate subsequent output copies.

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XEROX DISCLOSURE JOURNAL

ELECTROSTATIC CLEANER Proposed Classification SUBSYSTEM WITH IMPROVED US. C1.355/303 CLEANING LATITUDE
Int. Joseph A. Swift C1. G03g 21/00

In a xerographic system having a single electrostatic brush (ESB) cleaner, for example the system disclosed in U.S. Patent No. 4,252,433 issued to Sullivan, it has been determined that the cleaning latitude of the ESB subsystem is dependent upon the pile mass of the untransferred or residual toner remaining on the photoreceptor as it enters the cleaning subsystem. While toner charge and charge distribution are two factors which affect the performance of the cleaning subsystem, it is high pile masses which adversely influence both of these factors and result in a high stress condition for the single ESB cleaners. It is believed that as high pile masses, made up of multiple toner layers, pass under the preclean corotron, the uppermost toner layers block the lower layers from being properly charged to enable electrostatic cleaning. The result is that only the uppermost portion of the pile mass is appropriately charged and subsequently removed, while the remainder can pass through the cleaning subsystem and contaminate subsequent output copies.

Accordingly, the present invention is directed towards a toner disturber brush placed immediately upstream of the of the preclean corotron commonly used to charge the residual toner particles. The disturber brush may be small in size and is soft, but sufficiently ri...