Browse Prior Art Database

PHOTORECEPTOR BELTS PROGRAMMED WITH DEFECT LOCATIONS

IP.com Disclosure Number: IPCOM000027579D
Original Publication Date: 1997-Dec-31
Included in the Prior Art Database: 2004-Apr-08
Document File: 2 page(s) / 57K

Publishing Venue

Xerox Disclosure Journal

Abstract

A photoreceptor web is scanned with a vision system during the coating process to map the location of defects which might impact its performance in a xerographic printer or copier. Rather than discard sections of the photoreceptor web where these defects are minimal, the defect information can be encoded optically or magnetically on the edge of the photoreceptor in a final step of the web coating process. Alternatively, the information can be downloaded to an electronic device such as a ROM chip which is later inserted into the photoreceptor housing. Software in the printer or copier would compare the image to be printed with the defect map. Such software would dynamically control the position of the photoreceptor belt to assure that the defects are located in non-printing areas. For defects which lead to deletions or the absence of toner, it would be a relatively simple task to assure that they fall between lines of text. Dark spots can be registered within characters or solid areas.

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XEROX DISCLOSURE JOURNAL

PHOTORECEPTOR BELTS PROGRAMMED Proposed Classification WITH DEFECT LOCATIONS
Victor J. Heintz

U. S. C1. 3991042 Int. Cl. G03g 15/00

A photoreceptor web is scanned with a vision system during the coating process to map the location of defects which might impact its performance in a xerographic printer or copier. Rather than discard sections of the photoreceptor web where these defects are minimal, the defect information can be encoded optically or magnetically on the edge of the photoreceptor in a final step of the web coating process. Alternatively, the information can be downloaded to an electronic device such as a ROM chip which is later inserted into the photoreceptor housing. Software in the printer or copier would compare the image to be printed with the defect map. Such software would dynamically control the position of the photoreceptor belt to assure that the defects are located in non-printing areas. For defects which lead to deletions or the absence of toner, it would be a relatively simple task to assure that they fall between lines of text. Dark spots can be registered within characters or solid areas.

REFERENCE

U.S. Patent 5,313,254 discloses a motion control system for a printer which controls the speed of the photoreceptor belt to skip over the defective areas of the belt.

DP.5642

XEROX DISCLOSURE JOURNAL - Vol. 22, No. 6 NovemberDecember 1997 301

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