Browse Prior Art Database

LIQUID DEVELOPER APPLICATOR ASSEMBLY

IP.com Disclosure Number: IPCOM000023638D
Original Publication Date: 1978-Aug-31
Included in the Prior Art Database: 2004-Mar-31
Document File: 6 page(s) / 1M

Publishing Venue

Xerox Disclosure Journal

Abstract

An electrostatographic apparatus having a flexible web or belt imaging member adapted to pass over a pair of supporting rollers and a liquid development assembly having a liquid de-veloper applicator roll in contact with the imaging surface between the supporting rollers to apply liquid developer to the imaging surface is disclosed. The liquid developer appli-cator roll in contact with the imaging surface between the supporting rollers is positioned so that tension is applied to the imaging surface. The development assembly comprises a reservoir receptacle having a liquid developer applicator roll member which may be movable into and out of contact with the surface of a flexible imaging member. The receptacle is movably mounted by support means including one arm to suspend the development assembly from a fixed support as shown in Figures 1 and 2.

This text was extracted from a PDF file.
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This is the abbreviated version, containing approximately 33% of the total text.

Page 1 of 6

XEROX DISCLOSURE JOURNAL

LIQUID DEVELOPER APPLICATOR
ASSEMBLY
Gary L~ Whittaker

Proposed Classification
U~S. Cl. 118/262 XR

Into Cl~ B05c 1/06

/0

60

Volume 3 Number 4 July/August 1978 227

FIG, /

40

/0

FIG. 2

20 /5

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

Page 2 of 6

'I

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LIQUID DEVELOPER APPLICATOR ASSEMBLY (Cont'd)

An electrostatographic apparatus having a flexible web or belt
imaging member adapted to pass over a pair of supporting
rollers and a liquid development assembly having a liquid de-
veloper applicator roll in contact with the imaging surface
between the supporting rollers to apply liquid developer to
the imaging surface is disclosed. The liquid developer appli-
cator roll in contact with the imaging surface between the
supporting rollers is positioned so that tension is applied to
the imaging surface. The development assembly comprises a
reservoir receptacle having a liquid developer applicator roll
member which may be movable into and out of contact with the
surface of a flexible imaging member. The receptacle is
movably mounted by support means including one arm to suspend
the development assembly from a fixed support as shown in
Figures 1 and 2.

In electrostatographic copying machines, the development of
the latent image on the photoreceptor advantageously is
carried out by providing a developer fluid in operative
engagement with an imaging member such as a photoreceptor,
whereby the liquid developer is attracted to the imaging
member, or the photoreceptor may be brought into contact with
an interposing material, e.g., sheet material such as paper so
that the developed images are transferred thereto to produce
the desired copy. A preferred prior art electrostatic latent
image development mode where liquid developer is
advantageously brought into operative contact with the imaging
member by means of an applicator roll that rolls over the
charged imaging member is described in U.S. Patents 3,084,043
and 3,806,354. These patents describe electrostatographic
copying apparatuses and methods wherein the applicator is a
rigid cylindrical member having on its surface a pattern of
ridges and grooves which comprise lands and valleys,
respectively. A liquid developer is maintained in the valleys
below the surface of the lands. The applicator is positioned
to come into contact with a photoreceptor bearing on its
surface an electrostatic latent image.

An electrostatic latent image is produced by first charging
the entire surface of the imaging member or photoreceptor in
the dark and then by exposing the charged surface to imagewise
radiation. The portions of the charged photoreceptor surface
which are struck by the radiation are discharged, leaving an
image pattern or charge on the photoreceptor surface in the
non-radiation struck areas. In the instant disclosure, the
imaging member is flexible belt or web which may be a photore-
ceptor or an interposer capable of bearing an electrostatic
latent image.

XEROX DISCLOSURE JOURNAL

228 Volume 3 Number 4 July/...