Browse Prior Art Database

LEAD EDGE CURL FOR STRIPPING

IP.com Disclosure Number: IPCOM000024078D
Original Publication Date: 1979-Aug-31
Included in the Prior Art Database: 2004-Apr-02
Document File: 2 page(s) / 284K

Publishing Venue

Xerox Disclosure Journal

Abstract

One of the problems in the xerographic process is to strip the image-bearing sheet from the photoreceptor after transfer. This problem exists because of electro-static forces tacking the sheet to the photoreceptor. In the past, we have relied upon mechanical devices to strip the sheet. Often these devices have been used and have marred either the surface of the photoreceptor or disturbed the unfused

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XEROX DISCLOSURE JOURNAL

LEAD EDGE CURL FOR STRIPPING Proposed Classification Thomas Acquaviva U.S. Cl. 3 55/3 SH

mt. CL G03g 15/00

SOLENOD

/ ~ LREVOLUTION

One of the problems in the xerographic process is to strip the image-bearing sheet from the photoreceptor after transfer. This problem exists because of electro- static forces tacking the sheet to the photoreceptor. In the past, we have relied upon mechanical devices to strip the sheet. Often these devices have been used and have marred either the surface of the photoreceptor or disturbed the unfused

image or else nicked the lead edge of the sheet. If self-stripping can be guaranteed, then mechanical devices such as stripper fingers, gripper bars, puffers and the like can be eliminated. Additionally, protective devices such as misstrip

detectors may also be eliminated.

It is generally known that a sheet of paper will self-.strip from a curved photoreceptor if the lead edge of the sheet is curved away from the photoreceptor surface, It can be calculated and proven experimentally that the curvature need only extend to the first 1/8 inch of the lead edge and the total deflection be

approximately .015 inch.

To form a satisfactory lead edge curl on a copy sheet 5, the sheet is pressed between a pair of coining rolls 7, 8. Coining rolls 7, 8 produce an upward curvature in the sheet 5, but the opposite curl could just as easily be produced by inverting the position of two rolls. RoIl 7 consists of a soft rubber material with a durometer of 30 SA. T...