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WHITE BORDERS ON IMAGES MADE USING PHOTOELECTROPHORESIS SYSTEMS

IP.com Disclosure Number: IPCOM000023655D
Original Publication Date: 1978-Aug-31
Included in the Prior Art Database: 2004-Mar-31
Document File: 2 page(s) / 202K

Publishing Venue

Xerox Disclosure Journal

Abstract

During transfer on electrophoretic web imaging devices, a method to produce white borders on the resulting photoelectric prints is envisioned. This method involves selectively rejecting the pigment used in the ink mix at transfer while still transferring pigment at a quality level equivalent to the quality now obtained using a bias roll transfer member. As this method results in a complete pigment rejection at transfer, the formation of white borders on photoelectric prints is possible.

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XEROX DISCLOSURE JOURNAL

WHITE BORDERS ON IMAGES MADE Proposed Classification
USING PHOTOELECTROPHORESIS U.S. Cl. 96/1,2
SYSTEMS mt. Cl, G03g 5/12
Anonymous

During transfer on electrophoretic web imaging devices, a
method to produce white borders on the resulting photoelectric
prints is envisioned. This method involves selectively
rejecting the pigment used in the ink mix at transfer while
still transferring pigment at a quality level equivalent to
the quality now obtained using a bias roll transfer member.
As this method results in a complete pigment rejection at
transfer, the formation of white borders on photoelectric
prints is possible.

Specifically, the process steps in one embodiment are as
follows:

(1) The pigment emerges from the imaging zone in the photo~
electrophoresis system at various levels of negative charge on
the pigment.

(2) Negative potential is applied to the transfer roll thereby
causing the pigment on the conductive web, which is charged
negatively, to be rejected.

(3) Where the pigment is exposed at transfer (white light
flood illuminated) , the pigment exchanges charge and
transfers. This combination of dark area and light area
transfer results in crisp, white borders.

Volume 3 Number 4 July/August 1978 213

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