Browse Prior Art Database

CORONA GENERATING DEVICE HAVING IMPROVED PAPER GUIDES

IP.com Disclosure Number: IPCOM000023537D
Original Publication Date: 1978-Feb-28
Included in the Prior Art Database: 2004-Mar-31
Document File: 2 page(s) / 248K

Publishing Venue

Xerox Disclosure Journal

Abstract

A transfer corona generating device is conventionally used in a xerographic reproduction machine to effect transfer of a developed image from a photoreceptor to a sheet of paper, the device having an elongated straight -orona wire mounted within an elongated generally U-shaped conductive shield. To prevent the paper from entering the device, paper guides are often mounted over the device. Plastic paper guides are not satis-factory because they become charged and affect the output of the device. Other materials are not satisfactory because they are not strong enough or because they are not corona resist-ant. Although steel is strong enough, it also distorts the current density profile of the device.

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XEROX DISCLOSURE JOURNAL

CORONA GENERATING DEVICE HAVING Proposed Classification
IMPROVED PAPER GUIDES U.S. Cl. 250/324
Bruce W. Friday Int. Cl. HOlt 19/04

A transfer corona generating device is conventionally used in
a xerographic reproduction machine to effect transfer of a
developed image from a photoreceptor to a sheet of paper, the
device having an elongated straight ~orona wire mounted within
an elongated generally U-shaped conductive shield. To prevent
the paper from entering the device, paper guides are often
mounted over the device. Plastic paper guides are not satis-
factory because they become charged and affect the output of
the device. Other materials are not satisfactory because they
are not strong enough or because they are not corona resist-
ant. Although steel is strong enough, it also distorts the
current density profile of the device.

To minimize or eliminate distortion of the current density
profile of the device when using paper guides, the guides
should be made of conductive metal, and they should be elec-
trically biased to whatever potential which would exist at the
location of the guides if the latter were not present.
Alternatively, they can be connected to ground through a
resistance which would produce this potential.

Volume 3 Number 1 January/February 1978 33

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                  XEROX DISCLOSURE JOURNAL
34 Volume 3 Number 1 january/February 1978

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