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LIQUID DEVELOPMENT OF ELECTROSTATIC IMAGES BY INK SPITTING

IP.com Disclosure Number: IPCOM000023718D
Original Publication Date: 1978-Dec-31
Included in the Prior Art Database: 2004-Mar-31
Document File: 2 page(s) / 234K

Publishing Venue

Xerox Disclosure Journal

Abstract

An electrostatic charge pattern, for example on the surface of a xerographic drum 1, is developed with a liquid ink by means of a uporcupine-roller 2. The roller has over its cylin-drical surface a plurality of electrically conductive points, all of which project generally radially outwards, The roller is mounted for rotation about a horizontal axis with its lowermost part in an ink bath 3 and is located such that the points are close to, but not contacting, the xerographic surface, The ink fills the interstices between the points in meniscus fashion, A bias voltage is applied between the xero-' graphic surface and the roller, causing ink spitting to take place from the points, with charged areas on the xerographic surface attracting the ink in the configuration of the charge pattern.

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Page 1 of 2

XEROX DISCLOSURE JOURNAL

LIQUID DEVELOPMENT OF ELECTRO~
STATIC IMAGES BY INK SPITTING
E. Raymond Brooke

Proposed Classification
U.S. Cl, 96/1
mt. Cl. G03g

+0)

An electrostatic charge pattern, for example on the surface of
a xerographic drum 1, is developed with a liquid ink by means
of a uporcupine~ roller 2. The roller has over its cylin-~
drical surface a plurality of electrically conductive points,
all of which project generally radially outwards, The roller
is mounted for rotation about a horizontal axis with its
lowermost part in an ink bath 3 and is located such that the
points are close to, but not contacting, the xerographic
surface, The ink fills the interstices between the points in
meniscus fashion, A bias voltage is applied between the xero-'
graphic surface and the roller, causing ink spitting to take
place from the points, with charged areas on the xerographic
surface attracting the ink in the configuration of the charge
pattern.

Volume 3 Number 6 November/December 1978 373

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

Page 2 of 2

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

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