Browse Prior Art Database

AN IMPROVED PLATEN CLOTH FOR A PHOTORECEPTOR BELT SYSTEM

IP.com Disclosure Number: IPCOM000023122D
Original Publication Date: 1976-Oct-31
Included in the Prior Art Database: 2004-Mar-27
Document File: 2 page(s) / 249K

Publishing Venue

Xerox Disclosure Journal

Abstract

In a xerographic duplicating machine, a photoreceptor belt system having a photoreceptor belt which is drawn by vacuum against a flat surface as the belt moves around a closed path has an improved platen cloth extending over the sur~ face for preventing the belt from contacting the surface, the open area of the cloth being between 20% and 80% of the total area thereof. Nylon netting having an open area equal to approximately 40% of its total area has been found to be particularly satisfactory.

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XEROX DISCLOSURE JOURNAL

AN IMPROVED PLATEN CLOTH FOR Proposed Classification
A PHOTORECEPTOR BELT SYSTEM U.S. Cl. 271/197
Louis W. W, Shaffer iflt, Cl, B65h 29/32

In a xerographic duplicating machine, a photoreceptor belt
system having a photoreceptor belt which is drawn by vacuum
against a flat surface as the belt moves around a closed
path has an improved platen cloth extending over the sur~
face for preventing the belt from contacting the surface,
the open area of the cloth being between 20% and 80% of the
total area thereof. Nylon netting having an open area equal
to approximately 40% of its total area has been found to be
particularly satisfactory.

This improved platen cloth eliminates or minimizes several
problems caused or contributed to by prior art platen
cloths such as false paper jams, scratching of the photo~
receptor belt, and "pink-~banding" (crystallization of photo~
sensitive layer). Contamination of a platen cloth causes
the belt to buckle, and when a light reflecting type sensor
is used to detect paper mis~strips, this buckling causes the
sensor to indicate that a paper jam is present when there
is none due to a change in the coefficient of reflection
sensed by the sensor. If the buckle becomes severe enough,
the belt will be scratched by contact with the sensor. Con~
tamination of a platen cloth also increases the friction
between the platen cloth and the belt which generates ad-~
ditional heat to cause local crystallization or upink_bandingu
of the photosensitive su...