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GRAVURED SKID PLATES FOR P/R BACKUP

IP.com Disclosure Number: IPCOM000027094D
Original Publication Date: 1995-Apr-30
Included in the Prior Art Database: 2004-Apr-07
Document File: 2 page(s) / 75K

Publishing Venue

Xerox Disclosure Journal

Abstract

In an electrophotgraphic printing machine, the photoconductive belt module requires support at many discrete locations. These support or backup assemblies are required to correctly locate the photoconductive belt with respect to various subsystems. Typically, these backup assemblies are rollers which locate the photoconductive belt surface at precise positions relative to the respective processing stations. However, it is desirable to use non-rotating skid plates as backup assemblies in lieu of rollers. Skid plates are less expensive, more compact, provide better photoconductive belt registration and do not facilitate belt runout. In the newer color printing machines, belt runout and registration considerations are particularly important in order to achieve multicolor prints. The major problem with skid plates arises from the possible damage to the back surface of the photoconductive belt from debris and contamination on the belt which may be wedged between the plate and photoconductive belt during belt movement. In order to overcome this problem, the skid plate may be constructed with gravure slots therein. The gravure slots are of a width sufficiently large compared with the expected debris to prevent the debris from engaging the photoconductive belt. The points of contact between the skid plate and the belt are relatively small as the size of the lands between the slots are small when compared with the width of the gravure slots. For example, a 1 millimeter slot and a 0.1 millimeter land may be used. A design of this type would shunt any debris on the back surface of the photoconductive belt aside harmlessly into one of the gravure slots and not wedge it against the photoconductive surface. This prevents abrading and scratching of the back surface of the photoconductive belt.

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XEROX DISCLOSURE JOURNAL

GRAVURED SKID PLATES FOR P/R BACKUP U.S. C1.3551212 Jeffrey J. Folkins

Proposed Classification

Int. C1. G03g 5/00

In an electrophotgraphic printing machine, the photoconductive belt module requires support at many discrete locations. These support or backup assemblies are required to correctly locate the photoconductive belt with respect to various subsystems. Typically, these backup assemblies are rollers which locate the photoconductive belt surface at precise positions relative to the respective processing stations. However, it is desirable to use non-rotating skid plates as backup assemblies in lieu of rollers. Skid plates are less expensive, more compact, provide better photoconductive belt registration and do not facilitate belt runout. In the newer color printing machines, belt runout and registration considerations are particularly important in order to achieve multicolor prints. The major problem with skid plates arises from the possible damage to the back surface of the photoconductive belt from debris and contamination on the belt which may be wedged between the plate and photoconductive belt during belt movement. In order to overcome this problem, the skid plate may be constructed with gravure slots therein. The gravure slots are of a width sufficiently large compared with the expected debris to prevent the debris from engaging the photoconductive belt. The points of contact between the skid plate and the belt are relatively s...