Browse Prior Art Database

TM PROVEMENT IN PHOTOCONDUCTOR OVERCOATINGS

IP.com Disclosure Number: IPCOM000023886D
Original Publication Date: 1979-Apr-30
Included in the Prior Art Database: 2004-Apr-01
Document File: 2 page(s) / 284K

Publishing Venue

Xerox Disclosure Journal

Abstract

Disclosed is an imaging member comprised of a photoconductive insulating layer overcoated with an insulating film containing a substantially uniform dispersion of an ultraviolet light-absorbingmaterial in an amount sufficient to effect at least 90 percent absorption of ultraviolet irradiation, which is emitted from corona electrodes used in the sensitization and latent image formation steps in an electro-statographic imaging system. In one embodiment, the overcoating film employed for the purpose of shielding the ultraviolet, sensitive, photoconductive insulating layer from activating electromagnetic energy generated during corona sensitization was prepared by dispersing up to 30 volume percent of an organic, ultraviolet absorbing material in a film-forming, insulating resin. Ultraviolet absorbing materials that can be used include low molecular weight, aromatic compounds such as benzophenone derivatives, aromatic polyimides, acrylic copolymers of benzo-phenones and polymerizable benzotriazoles, while the insulating resin used for dispersing the ultraviolet absorbing material includes resins such as polyesters, polycarbonates, and cellulose esters. The photoconductive insulating layer employed includes both organic and inorganic materials such as amorphous selenium, selenium alloys, or such materials dispersed in a film-forming,insulating resin and polyvinyl carbazoles, This imaging member can be used in an electrostatographic imaging method wherein there is formed a latent image on the imaging layer followed by optionally developing such image with an electroscopic material followed by transfer to a suitable substrate such as paper and fusing the image thereon.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 73% of the total text.

Page 1 of 2

XEROX DISCLOSURE JOURNAL

TM PROVEMENT IN PHOTOCONDUCTOR Proposed Classification OVERCOATING5~ U.S. CL 96/1.5
3ohn W. Weigi Tnt, CL G03g 5/04

Disclosed is an imaging member comprised of a photoconductive insulating layer overcoated with an insulating film containing a substantially uniform dispersion of an ultraviolet light~absorbingmaterial in an amount sufficient to effect at least 90 percent absorption of ultraviolet irradiation, which is emitted from corona electrodes used in the sensitization and latent image formation steps in an electro~ statographic imaging system. In one embodiment, the overcoating film employed for the purpose of shielding the ultraviolet, sensitive, photoconductive insulating layer from activating electromagnetic energy generated during corona sensitization was prepared by dispersing up to 30 volume percent of an organic, ultraviolet absorbing material in a film~forming, insulating resin. Ultraviolet absorbing materials that can be used include low molecular weight, aromatic compounds such as benzophenone derivatives, aromatic polyimides, acrylic copolymers of benzo~ phenones and polymerizable benzotriazoles, while the insulating resin used for dispersing the ultraviolet absorbing material includes resins such as polyesters, polycarbonates, and cellulose esters. The photoconductive insulating layer employed includes both organic and inorganic materials such as amorphous selenium, selenium alloys, or such materials dispersed in a film~for...