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METHOD OF PREPARING A GRAVURE PLATE USING ELECTROGRAPHICALLY GENERATED POWDER IMAGES

IP.com Disclosure Number: IPCOM000022910D
Original Publication Date: 1976-Apr-30
Included in the Prior Art Database: 2004-Mar-27
Document File: 2 page(s) / 219K

Publishing Venue

Xerox Disclosure Journal

Abstract

A gravure plate is prepared using electrography by trans- ferring an electrographically generated powder image to a gravure (cupped) member to fill or partially fill the cups. It is preferred that the dot pattern of the powder image and the gravure cells be in registration which can be accomplished by using the gravure member to produce the image. A half-tone pattern gravure member (soft or hard dot screen) can be made by using a transparent substrate and pigmenting or dying the cell portion of the gravure member, or using a transparent cell structure on half-tone substrates. In addition, it is preferred that the powder

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XEROX DISCLOSURE JOURNAL

METHOD OF PREPARING A Proposed Classification
GPAVtJRE PLATE USING ELEC- u.s. Cl. 101/1 TROGRAPHICALLY GENERATED mt. Cl. B41f
POWDER IM?~GES

L. F. Bean

A gravure plate is prepared using electrography by trans-
ferring an electrographically generated powder image to a
gravure (cupped) member to fill or partially fill the cups.
It is preferred that the dot pattern of the powder image
and the gravure cells be in registration which can be
accomplished by using the gravure member to produce the
image. A half-tone pattern gravure member (soft or hard
dot screen) can be made by using a transparent substrate
and pigmenting or dying the cell portion of the gravure
member, or using a transparent cell structure on half-tone
substrates. In addition, it is preferred that the powder

be transferred into "cupped" area only.

The reproduction line image can be made sharp (i.e. gravure
pattern removed) by transferring an over-exposed toner
image to the gravure surface, followed by a transfer of
correctly exposed toner image to define the edge of the
line image, The imaging sharpening transfer need not
contain "solid areas" and can be generated by an "edge
only" electrographic development system such as "open
cascade" development.

Registration of the dot patterns of the image and gravure
cells can be obviated by filling the gravure cups with an
electrographic powder and removing the powder imagewise by
developing a latent electrostatic pattern.

Volume 1 Number 4 April 1976 17

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