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INK APPLICATOR FOR ELECTROSTATIC DEVELOPMENT WITH VISCOUS/COHESIVE INKS

IP.com Disclosure Number: IPCOM000022857D
Original Publication Date: 1976-Mar-31
Included in the Prior Art Database: 2004-Mar-27
Document File: 2 page(s) / 369K

Publishing Venue

Xerox Disclosure Journal

Abstract

In the development of electrostatic latent images with highly viscous inks which have cohesive forces greater than the forces generally encountered in electrostatic develop-' ment of images, the ink donor member for presenting the ink to the surface being developed comprises an abhesive surface. The abhesive surface of the donor member is wetted with a fluid which promotes the transfer or release of the ink in image formation from the donor member to the surface being developed. An improved ink applicator method and apparatus for uniformly coating the donor member with the viscous/cohesive ink is described.

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XEROX DISCLOSURE JOURNAL

INK APPLICATOR FOR ELECTROSTATIC Proposed Classification
DEVELOPMENT WITH VISCOUS/COHESIVE U.S. Cl, 118/637
INKS Int, Cl. B05b 5/02
Thomas Camis
Alan R. Camilleri

In the development of electrostatic latent images with
highly viscous inks which have cohesive forces greater than
the forces generally encountered in electrostatic develop-'
ment of images, the ink donor member for presenting the
ink to the surface being developed comprises an abhesive
surface. The abhesive surface of the donor member is wetted
with a fluid which promotes the transfer or release of the
ink in image formation from the donor member to the surface
being developed. An improved ink applicator method and
apparatus for uniformly coating the donor member with the
viscous/cohesive ink is described.

An ink applicator member, preferably an applicator roll
of the type having insulating filaments wound at a suitable
spacing around the outside of a metal roll, is partially
submerged in the viscous/cohesive ink. The thickness of
the ink on the applicator member is controlled by suitable
means, for example, a doctor blade, The ink applicator
member is capable of advancing adjacent the wetted abhesive
surface of the donor member, preferably a belt, the fila-'
ments of the applicator member maintaining a space between
the ink thereon and the donor member. After doctoring, it
is preferred that the air gap between the surface of the
donor member and the ink meniscus on the applicator member
vary from about 3 microns near the filaments to about 10
micro...