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SEQUENTIAL SCREENING DEVICE

IP.com Disclosure Number: IPCOM000023461D
Original Publication Date: 1977-Oct-31
Included in the Prior Art Database: 2004-Mar-31
Document File: 2 page(s) / 241K

Publishing Venue

Xerox Disclosure Journal

Abstract

It is often desirable in xerography to present the development system with a "screened-t image. This publication discloses a device which permits efficient sequential screening of an image after exposure but prior to development. The device consists of a slotted rotating barrel through which light is projected. The method of using the device is more fully il-lustrated by Figures 1, 2 and 3 in which Figure 1 shows the location of the device in a typical xerographic machine. Figures 2 and 3 are end views of the device not exposing and exposing the drum, The advantage of this system is that it permits screening in a direction perpendicular to the movement of the surface of the photoreceptor. Screening parallel to the surface can be accomplished by a stationary screen or by incorporating the screen pattern into the barrel.

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Page 1 of 2

XEROX DISCLOSURE JOURNAL

SEQUENTIAL SCREENING DEVICE
J. Michael Magde

CHARGE

FIG, /

PHOTO RECEPTOR

Proposed Classification
U.S. Cl. 96/1

mt. Cl. G03g

DEVELOPMENT
ZONE

ROTATING

BARREL

FIG. 2 FIG. 3

September/October 1977 11

Volume 2 Number 5

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

Page 2 of 2

SEQUENTIAL SCREENING DEVICE (Cont~d)

It is often desirable in xerography to present the development

tsystem with a "screened~ image. This publication discloses a
device
which permits efficient sequential screening of an
image after exposure but prior to development. The device
consists of a slotted rotating barrel through which light is
projected. The method of using the device is more fully il~-
lustrated by Figures 1, 2 and 3 in which Figure 1 shows the
location of the device in a typical xerographic machine.
Figures 2 and 3 are end views of the device not exposing and
exposing the drum, The advantage of this system is that it
permits screening in a direction perpendicular to the movement
of the surface of the photoreceptor. Screening parallel to
the surface can be accomplished by a stationary screen or by
incorporating the screen pattern into the barrel.

                  XEROX DISCLOSURE JOURNAL
12 Volume 2 Number 5 September/October 1977

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