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IMAGING MEMBER AND METHOD

IP.com Disclosure Number: IPCOM000023047D
Original Publication Date: 1976-Jul-31
Included in the Prior Art Database: 2004-Mar-27
Document File: 2 page(s) / 263K

Publishing Venue

Xerox Disclosure Journal

Abstract

There is described an electrophotographic imaging member capable of the preparation of a multiplicity of copies of an original object with only one exposure and a method for utilizing the member. The imaging member consists essentially of a conductive substrate, a non-persistent photoconductive layer residing on the substrate, a persistent photoconductive insulating layer residing over the non-persistent photoconductive layer and an unpigmented electrically insulating film overcoating residing on the free surface of the persistent photocon- ductive insulating layer. In operation, the imaging member is initially exposed to image information at a wavelength and for an interval sufficient to render the persistent photoconductive layer persistently conductive for some extended period of time, e.g. about 60 seconds or more subsequent to the termination of illumination.

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XEROX DISCLOSURE JOURNAL

IMAGING MEMBER AND METHOD Proposed Classification
Gustav R. Pfister U.S. Cl. 96/1.5
David J. Williams tnt. Cl. G03g 5/04

There is described an electrophotographic imaging member
capable of the preparation of a multiplicity of copies
of an original object with only one exposure and a method
for utilizing the member. The imaging member consists essentially of a conductive substrate, a non-persistent photoconductive layer residing on the substrate, a
persistent photoconductive insulating layer residing
over the non-persistent photoconductive layer and an unpigmented electrically insulating film overcoating residing on the free surface of the persistent photocon- ductive insulating layer. In operation, the imaging member is initially exposed to image information at a wavelength and for an interval sufficient to render the
persistent photoconductive layer persistently conductive
for some extended period of time, e.g. about 60 seconds
or more subsequent to the termination of illumination.

The surface of the electrically insulating layer is then uniformly charged in the dark to a constant surface potential, followed by the non-persistent photoconductive insulating layer being subjected to blanket exposure with

4 activating electromagnetic radiation with the result that

there is generated upon the surface of the insulating layer a contrast potential sufficient for the formation of a developable latent image. The latent image is then developed to form a vis...