Browse Prior Art Database

Cleaning Method for Photoconductive Process

IP.com Disclosure Number: IPCOM000076810D
Original Publication Date: 1972-Apr-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 33K

Publishing Venue

IBM

Related People

Wilbur, CV: AUTHOR

Abstract

A cleaning system for removing residual toner from a photoconductor after image transfer is shown. The photoconductor 10 is mounted on the periphery of a rotating drum 12 and the image is produced in conventional fashion by uniformly charging the photoconductor, selectively imagewise discharging the photoconductor surface, developing the image, and transferring the developed image to a suitable copy sheet.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 77% of the total text.

Page 1 of 2

Cleaning Method for Photoconductive Process

A cleaning system for removing residual toner from a photoconductor after image transfer is shown. The photoconductor 10 is mounted on the periphery of a rotating drum 12 and the image is produced in conventional fashion by uniformly charging the photoconductor, selectively imagewise discharging the photoconductor surface, developing the image, and transferring the developed image to a suitable copy sheet.

The residual toner is removed by cleaning apparatus, which comprises a belt 14 of material wrapped around a sharp edge member 16 and a driving roll 18. The belt 14 is in contact with the photoconductor at the sharp edge and is driven in an opposite direction to the photoconductor travel. Belt 14 is nonconductive and it is charged by a corona discharge device 20 prior to engagement with the photoconductor. A preclean corona 22 of opposite electrical sign might also be necessary to insure a high charge on the residual toner. The belt 14 may be conductive and a bias voltage is provided on the knife edge 16 sufficient to attract the toner. In both of these cases the high nonuniform field developed at the sharp edge, combined with the wiping action and the ability of the belt to carry the toner away from point of contact, provides excellent cleaning of the photoconductor with minimum force on the photoconductor by the blade 16.

Once the toner is attracted to the belt, it is carried to a point from which it is wiped or scra...