Browse Prior Art Database

LIQUID DEVELOPER APPLICATOR ASSEMBLY

IP.com Disclosure Number: IPCOM000023637D
Original Publication Date: 1978-Aug-31
Included in the Prior Art Database: 2004-Mar-31
Document File: 4 page(s) / 937K

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 are disclosed. The liquid developer applicator roll in contact with the imaging surface between the supporting rollers is positioned so that tension is applied to the imaging surface by the liquid developer appli-cator roll. 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 may be fixedly mounted, as shown in Figure 1, or it may be movably mounted by support means including one arm to suspend the liquid development assembly from a fixed support as shown in Figure

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XEROX DISCLOSURE JOURNAL

LIQUID DEVELOPER APPLICATOR
ASSEMBLY
Gary L. Whittaker

Proposed Classification
U~S. Cl. 118/262 XP.
mt. Cl. BO5c 1/06

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FIG. /

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FIG. 2

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Volume 3 Number 4 July/August 1978 223

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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 are disclosed. The liquid developer
applicator roll in contact with the imaging surface between
the supporting rollers is positioned so that tension is
applied to the imaging surface by the liquid developer appli~
cator roll. 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 may be fixedly
mounted, as shown in Figure 1, or it may be movably mounted by
support means including one arm to suspend the liquid
development assembly from a fixed support as shown in Figure


2.

A typical example of a prior art electrostatic latent image
development mode wherein liquid developer is 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
references 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. The 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 of charge on the photore~
ceptor surface in the non~radiation struck areas. In the
instant disclosure, the imaging member is a flexible belt or
web which may be a photoreceptor or an interposer capable of
bearing an electrostatic latent image.

The photoreceptor surface bearing the electrostatic latent
image or the interposer web or belt surface bearing the elec~
trostatic latent image and the applicator are brought into
moving contact during which the liquid developer is drawn to
the photoreceptor or interposer web or belt from the valleys

                 XEROX DISCLOSURE JOURNAL
224 Volume 3 Number 4 July/August 1978

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LIQUID DE...