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BIASED CLEANING BLADE / DISCHARGE PHOTORECEPTOR / TONER RECOVERY AIR REMOVAL CLEANING SYSTEM

IP.com Disclosure Number: IPCOM000026867D
Original Publication Date: 1994-Feb-28
Included in the Prior Art Database: 2004-Apr-06
Document File: 2 page(s) / 76K

Publishing Venue

Xerox Disclosure Journal

Abstract

A cleaning configuration combining a rear exposure photoreceptor discharge, a biased cleaning blade and a toner removal air exhaust that improves cleaning of residual toner remaining after the transfer of a developed toner image from a photoreceptor in a printing machine is disclosed. A current problem with cleaning blade sub-systems is that toner builds up in small wedge shaped gaps between the blade and the photoreceptor (which is upstream from the blade). The disclosed cleaning configuration alleviates the aforementioned problem while improving cleaning blade life by: exposing the photoreceptor from the rear to reduce electrostatic force; using a conductive blade with a bias to repel toner; and using a waste toner air removal system.

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XEROX DISCLOSURE JOURNAL

BIASED CLEANING BLADE / Proposed DISCHARGE PHOTORECEPTOR / U.S. C1.355/296 Classification TONER RECOVERY AIR REMOVAL
C1. Int. CLEANING SYSTEM G03g 21/00 Ronald E. Godlove

A cleaning configuration combining a rear exposure photoreceptor discharge, a biased cleaning blade and a toner removal air exhaust that improves cleaning of residual toner remaining after the transfer of a developed toner image from a photoreceptor in a printing machine is disclosed. A current problem with cleaning blade sub-systems is that toner builds up in small wedge shaped gaps between the blade and the photoreceptor (which is upstream from the blade). The disclosed cleaning configuration alleviates the aforementioned problem while improving cleaning blade life by: exposing the photoreceptor from the rear to reduce electrostatic force; using a conductive blade with a bias to repel toner; and using a waste toner air removal system.

Rear exposure of a photoreceptor just upstream of and at the line of contact with the cleaning blade removes any charge remaining on the photoreceptor at that point as well as areas of the photoreceptor that lie under residual toner deposits. Charge removal is facilitated by a biased conductive cleaning blade, the polarity of which is the same as the charge on the majority of toner particles. Consequently, electrostatically attractive forces between the toner particles are minimized in order that the toner particles are repelled away from...