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SIMULTANEOUS DUPLEX XEROGRAPHY

IP.com Disclosure Number: IPCOM000023739D
Original Publication Date: 1978-Dec-31
Included in the Prior Art Database: 2004-Mar-31
Document File: 2 page(s) / 260K

Publishing Venue

Xerox Disclosure Journal

Abstract

Two xerographic drums 1, 2 with conformable surfaces are mounted for counter rotation in rolling engagement with each other. Each drum has the conventional xerographic process stations (charge, expose, develop, transfer, clean) around its periphery. The drums are arranged so that they both have their transfer stations in the nip 3 between them, whereby simultaneous transfer takes place to both sides of a copy sheet passed through the nip. The xerographic processors 4, 5 of the two drums are operated with opposite polarity elec-trical charges, so that there is a tendency for the developed images on the two drums to be attracted towards each other, and hence on to the copy sheet. The development may be by liquid or by powder, and the xerographic images may be formed either by electrophotography or by electrography,

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XEROX DISCLOSURE JOURNAL

SIMULTANEOUS DUPLEX XEROGRAPHY
E. Raymond Brooke
Michael R. Tubbs
George R, White

4 5

I 2

Volume 3 Number 6 November/December 1978 389

Proposed Classification
U.S. Cl, 96/1.4
mt. CL G03g 13/14

Two xerographic drums 1, 2 with conformable surfaces are
mounted for counter rotation in rolling engagement with each
other. Each drum has the conventional xerographic process
stations (charge, expose, develop, transfer, clean) around its
periphery. The drums are arranged so that they both have
their transfer stations in the nip 3 between them, whereby
simultaneous transfer takes place to both sides of a copy
sheet passed through the nip. The xerographic processors 4, 5
of the two drums are operated with opposite polarity elec~
trical charges, so that there is a tendency for the developed
images on the two drums to be attracted towards each other,
and hence on to the copy sheet. The development may be by
liquid or by powder, and the xerographic images may be formed
either by electrophotography or by electrography,

[This page contains 1 picture or other non-text object]

Page 2 of 2

                 XEROX DISCLOSURE JOURNAL
390 Volume 3 Number 6 November/December 1978

[This page contains 1 picture or other non-text object]