Browse Prior Art Database

IMPROVED POST-IMAGE CLEAN RECLAIM SYSTEM

IP.com Disclosure Number: IPCOM000023787D
Original Publication Date: 1979-Feb-28
Included in the Prior Art Database: 2004-Mar-31
Document File: 2 page(s) / 273K

Publishing Venue

Xerox Disclosure Journal

Abstract

In high-speed electrophotographic development machines, it is especially important to remove any background particles which may be present after development. The figure illustrates a magnetic brush development system which utilizes an improved post-image reclaim system to remove unwanted background.

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XEROX DISCLOSURE JOURNAL

IMPROVED POST-IMAGE CLEAN RECLAIM SYSTEM
E. F. Young

Proposed Classification

U.S. CI, 118/652

mt. Cl. G03g 15/06

In high-speed electrophotographic development machines, it is especially important to remove any background particles which may be present after development. The figure illustrates a magnetic brush development system which utilizes an improved post-image reclaim system to remove unwanted background.

A photoreceptor belt 2, after being exposed to an image light pattern, is moved passed magnetic brush rollers 3-7. The rollers move developer, having an appro- priate charge, from sump 8 into close proximity with the belt surface so as to cause development of the image area. Some toner particles, however, also become

loosely attached to non-image areas and constitute undesirable background toner.

Magnetic brush 9 acts as a scavenger to remove the unwanted background toner (a non-detrimental amount of image area toner is also unavoidably removed). In

previous systems, a cylindrical roller consisting of a non-magnetic material such as

9

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1/

8

Volume 4 Number 1 3anuary/February 1979 21

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IMPROVED POST~IMAGECLEAN RECLAIM SYSTEM (Cont~d)

stainless steel was biased to an appropriate level and used to remove the scavenged toner from brush 9~ The toner was subsequently removed from the cylindrical roller by a scraper assembly. The present system is improved by replacing the...