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METHOD OF OBTMNING CONTINUOUS DIELECTRIC OVERCOATINGON PHOTO-CONDUCTIVE CYLINDERS OR BELTS

IP.com Disclosure Number: IPCOM000023128D
Original Publication Date: 1976-Oct-31
Included in the Prior Art Database: 2004-Mar-27
Document File: 2 page(s) / 223K

Publishing Venue

Xerox Disclosure Journal

Abstract

In preparing certain xerographic photoreceptors it is necessary to deposit on the photoconductive surface a dielectric overcoating, It is difficult to deposit a thin layer of a dielectric overcoating material from solution which is uniform in thickness, pinhole free and which has the high dielectric strength necessary for operation in this configuration.

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XEROX DISCLOSURE JOURNAL

METHOD OF OBTMNING ~ CONTINUOUS Proposed Classification
DIELECTRIC OVERCO?~TINGON PHOTO- U,S. Cl, 96/1,5
CONDtJCTIVE CYLINDERS OR BELTS Int~ Cl. G03g 5/04 Robert N, Jones

In preparing certain xerographic photoreceptors it is
necessary to deposit on the photoconductive surface a
dielectric overcoating, It is difficult to deposit a
thin layer of a dielectric overcoating material from
solution which is uniform in thickness, pinhole free and
which has the high dielectric strength necessary for
operation in this configuration.

This disclosure involves a method of applying a seamless
dielectric overocating to xerographic belts and drums,
The method involves extruding a dielectric material
which is pinhole free and exhibits uniform shrinkage
upon heating, e.g. Mylar, in cylindrical form having a
diameter larger than the photoreceptor which is to be
coated, The cylindrical sheet is slipped over a
xerographic drum which comprises a conductive substrate
having a layer of photoconductive material on and in
operative contact with its surface to form a composite
of the drum overcoated with the sleeve of dielectric
material, The composite is heated to cause the dielectric
sleeve to shrink thereby providing a continuous dielectric
overcoat ing,

If enhanced bonding characteristics are required, the
inside of the cylinder of dielectric material can be
coated with a thermosetting adhesive prior to heat shrinking,

Volume 1 Nunthers 9/10 September/October 1976 3

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