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Xerographic Cleaning Station

IP.com Disclosure Number: IPCOM000049534D
Original Publication Date: 1982-Jun-01
Included in the Prior Art Database: 2005-Feb-09
Document File: 2 page(s) / 46K

Publishing Venue

IBM

Related People

Richert, JK: AUTHOR [+2]

Abstract

A brush-type photoconductor cleaning station is provided wherein an electrically biased metal roller functions both as a brush knock-off bar and as a scavenging roller for airborne toner.

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Xerographic Cleaning Station

A brush-type photoconductor cleaning station is provided wherein an electrically biased metal roller functions both as a brush knock-off bar and as a scavenging roller for airborne toner.

Residual toner 10 is cleaned from xerographic photoconductor 11 by rapidly rotating brush 12. Brush 12 is made up of synthetic fibers, for example. Rotation of brush 12 may create an airflow such as represented by arrows 13. This airflow can be assisted by a vacuum source connected to duct 14, if desired.

The brush fibers approaching cleaning nip 15 are electrostatically charged to a polarity opposite that of toner 10. Thus, the toner is removed from the photoconductor by a combination of mechanical and electrostatic force.

As the brush fibers leave the cleaning nip, they are coated with toner which has been removed from the photoconductor. These fibers now encounter a metal roller 16 which is electrically isolated from the frame of the cleaning station. This roller is connected to a source of DC voltage 17 of a polarity which is opposite that of toner 10. Electrical trical connection between roller 16 and source 17 can, for example, be made by metal cleaning blade 18.

As the toner-laden brush fibers encounter roller 16, the mechanical agitation of the fibers both dislodges the toner and charges the brush fibers in preparation for their next encounter with the photoconductor at cleaning nip 15.

As a result, the air in the vicinity of roller 16 become...