Browse Prior Art Database

PRE-TRANSFER IDLER ROLL WITH BAFFLE

IP.com Disclosure Number: IPCOM000026348D
Original Publication Date: 1991-Jun-30
Included in the Prior Art Database: 2004-Apr-05
Document File: 2 page(s) / 108K

Publishing Venue

Xerox Disclosure Journal

Abstract

In reprographic systems a common copy defect is a transfer deletion that may be caused by lack of intimate contact between the copy sheet and the photoreceptor during transfer of toner from the photoreceptor to the copy sheet. This lack of contact may be caused by imperfections in the paper, pockets or cockles in duplex sheets previously printed on one side. or wrinkles in the photoreceptor belt itself.

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XEROX DISCLOSURE JOURNAL

PRE-TRANSFER IDLER ROLL Proposed Classification

I

WITH BAFFLE U.S. C1.355/309

I Hector J. Sanchez Int. C1. G03g 21/00

XEROX DISCLOSURE JOURNAL - Vol. 16, No. 3 May/June 1991 195

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PRE-TRANSFER IDLER ROLL WITH BAFFLE(Cont'd)

In reprographic systems a common copy defect is a transfer deletion that may be caused by lack of intimate contact between the copy sheet and the photoreceptor during transfer of toner from the photoreceptor to the copy sheet. This lack of contact may be caused by imperfections in the paper, pockets or cockles in duplex sheets previously printed on one side. or wrinkles in the photoreceptor belt itself.

Accordingly, the present invention addresses the contact problem by utilizing the beam strength of the copy sheet to force it against the photoreceptor surface, thereby creating the intimate contact required for the transfer of toner and resulting in significant reduction of transfer deletions. Referring now to the figure, which illustrates a portion of a photoreceptor belt module and copy sheet feed path, the present invention achieves the contact required between copy sheet 12 and photoreceptor belt 14 through the use of a steep angle of contact between belt 14 and sheet 12, and an idler roll 16 to facilitate the use of high basis weight copy sheet stock. BaMe arrangement 18 is used to replace the older, curved baffle arrangement, shown with reference numeral 20. In addition, the new baffle arrangement is directly connected to the photoreceptor belt mounts to assure that the critical positioning of the baffle is maintained at all times. In the present embodiment, the baffle is located so as to provide an...