Browse Prior Art Database

IMPROVED TRANSFER ZONE FLATNESS WITH EXTENDED WIDTH PLENUM WALL DESIGN

IP.com Disclosure Number: IPCOM000027555D
Original Publication Date: 1997-Oct-31
Included in the Prior Art Database: 2004-Apr-08
Document File: 2 page(s) / 102K

Publishing Venue

Xerox Disclosure Journal

Abstract

Along with the changing of processing speed or extending the configuration of flexible belt-type photoreceptors, image quality defects are induced by non-flat transfer zone conditions. These defects are in a pattern of in-process direction deletions which would be

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XEROX DISCLOSURE JOURNAL

IMPROVED TRANSFER ZONE FLATNESS WITH EXTENDED WIDTH PLENUM WALL DESIGN Int. C1. G03g 21/00 Charles A. Radulski
David B. Montfort

Proposed Classification
U. S. C1. 3991098

Along with the changing of processing speed or extending the configuration of flexible belt-type photoreceptors, image quality defects are induced by non-flat transfer zone conditions. These defects are in a pattern of in-process direction deletions which would be

XEROX DISCLOSURE JOURNAL - Vol. 2, No. 5 SeptembedOctober 1997 247

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IMPROVED TRANSFER ZONE FLATNESS WITH EXTENDED WIDTH PLENUM
WALL DESIGN (CONT'D)

caused by Paschen limited breakdown. The breakdown is induced by air gaps between the substrate (paper, etc.) and the photoreceptor surface caused by significant belt ripple or the reduction of photoreceptor belt tension.

One approach towards resolving the image defects is to flatten the photoreceptor belt prior to transfer paper touchdown to ensure intimate contact between the two surfaces. Another approach is to increase the belt tension locally at the transfer zone.

Figure 1 discloses a transfer device including these two approaches. The flexible belt-type photoreceptor 1 is extended among stripper roll 2, drive roll 3 and possibly other rolls (not shown). Transfer corotron 4 and detach corotron 5 are positioned facing the photoreceptor at the transfer zone Z. Transfer paper 6 is guided by the paper guide 7 to touchdown to the photoreceptor surface beyond the transfer zone Z. Before the touchdown point of the transfer paper, l...