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Browse Prior Art Database

Xerographic Photoconductor

IP.com Disclosure Number: IPCOM000061129D
Original Publication Date: 1986-May-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Balthis, VM: AUTHOR [+2]

Abstract

The generation of interference fringes, when imaging a xerographic photoconductor with monochromatic light such a produced by a solid state laser, can be prevented by using a roughened or filled aluminized Mylar (E.I. du Pont de Nemours & Co.) substrate which does not specularly reflect light which impinges on its surface. Such substrates which can be used in xerographic processes without having interference fringes are the brand EB-11 (E.I. du Pont de Nemours & Co.) or the brand 329 (ICI Americas, Inc.). If these substrates are too rough, severe print quality defects can be obtained. Also, these substrates are opaque so that backlight erasure of the photoconductor is not practical.

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Xerographic Photoconductor

The generation of interference fringes, when imaging a xerographic photoconductor with monochromatic light such a produced by a solid state laser, can be prevented by using a roughened or filled aluminized Mylar (E.I. du Pont de Nemours & Co.) substrate which does not specularly reflect light which impinges on its surface. Such substrates which can be used in xerographic processes without having interference fringes are the brand EB-11 (E.I. du Pont de Nemours & Co.) or the brand 329 (ICI Americas, Inc.). If these substrates are too rough, severe print quality defects can be obtained. Also, these substrates are opaque so that backlight erasure of the photoconductor is not practical.

Therefore, interference fringes can also be prevented by dispersing an inert pigment in the photoconductor's charge transport layer (CTL), or by overcoating the photoconductor with an inert layer containing such a pigment.

The brand DIARYLIDE YELLOW is one such pigment. The vendor of this pigment is Sun Chemical Company, and it is identified as G14014 Color Index Pigment Yellow 12. This material is in the submicron size range, and is electrically inert in the CTL of the photoconductor. It is selected because it does not absorb light produced by the laser which is used to selectively erase the photoconductor in the areas which are to be toner as the photoconductor passes thru a magnetic brush developer.

It is thought that the absence of interference fringes i...