Browse Prior Art Database

METHOD FOR MAXIMIZING CLEANABILITY OF BIAS TRANSFER ROLLS

IP.com Disclosure Number: IPCOM000026881D
Original Publication Date: 1994-Feb-28
Included in the Prior Art Database: 2004-Apr-06
Document File: 2 page(s) / 105K

Publishing Venue

Xerox Disclosure Journal

Abstract

Bias transfer rolls (BTR) formed using a conductive elastomer have the property of being very difficult to clean with a brush, a blade or an air stream cleaning system. Attempts have been made to find a conductive elastomer for bias transfer rolls that is not only highly conductive but also wear resistant and readily cleanable. Current findings, however, have only provided an elastomer material that is highly conductive but not readily cleanable. One costly technique that overcomes this impasse first forms the bulk of a bias transfer roll using a highly conductive elastomer that is not very cleanable and subsequently applies an overcoat to the roll with a less conductive material that is readily cleanable. Besides cost, a further limitation of the process of applying an overcoat is that grinding of the surface of the bias transfer roll is necessitated in order to achieve the desired tolerance of the overall roll diameter. Additionally, bias transfer rolls developed using the overcoat process may experience variable inboardloutboard conductivity profiles due to the grinding process.

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XEROX DISCLOSURE JOURNAL

METHOD FOR MAXIMIZING CLEANABILITY OF BIAS TRANSFER ROLLS
Ronald E. Godlove

Proposed Classification
U.S. C1.430/129 Int. C1. G03g 05/04

Bias transfer rolls (BTR) formed using a conductive elastomer have the property of being very difficult to clean with a brush, a blade or an air stream cleaning system. Attempts have been made to find a conductive elastomer for bias transfer rolls that is not only highly conductive but also wear resistant and readily cleanable. Current findings, however, have only provided an elastomer material that is highly conductive but not readily cleanable. One costly technique that overcomes this impasse first forms the bulk of a bias transfer roll using a highly conductive elastomer that is not very cleanable and subsequently applies an overcoat to the roll with a less conductive material that is readily cleanable. Besides cost, a further limitation of the process of applying an overcoat is that grinding of the surface of the bias transfer roll is necessitated in order to achieve the desired tolerance of the overall roll diameter. Additionally, bias transfer rolls developed using the overcoat process may experience variable inboardloutboard conductivity profiles due to the grinding process.

A method is disclosed for constructing a bias transfer roll with enhanced cleanability by applying a defined surface roughness to the roll. Consequently, the process of applying an overcoat described above can be eliminated since a single bulk material with high conductivity can be used to form the bias transfer roll. The increased cleanability of the bias transfer roll is achieved by grinding the surface of the roll to a defined (or ideal) level of roughness, thereby mini...