Original Publication Date: 1976-Feb-29
Included in the Prior Art Database: 2004-Mar-26
Xerox Disclosure Journal
Direct heating of paper for fusing or fixing e1ectrostato~- graphic toner thereon in image configuration to prevent smudging or other removal requires cooling of the paper surface or other cautions to reduce the risk of combustion.
XEROX DISCLOSURE JOURNAL
ELECTROSTATIC COOLING Proposed Classification
F~ J~ Potter U,S, C1~ 96,1
mt. Cl. G03g
Direct heating of paper for fusing or fixing e1ectrostato~-
graphic toner thereon in image configuration to prevent
smudging or other removal requires cooling of the paper
surface or other cautions to reduce the risk of combustion.
Fans and other cooling apparatus can be replaced by a
system employing a high voltage, ionic discharge system
where silent, efficient cooling is accomplished through
removal of heat by the effect of non~arcing, ionic corona
discharge from the negative ends of high voltage probes.
A wire screen placed in a plane parallel to the image
bearing paper~sbackside is grounded to an electrical supply
source while a probe positioned behind the screen is con-~
nected to the high voltage supply, voltage applied to the
probe generates current in the screen causing air movement,
Vortex columns are created which push out cooler air from
the screen and this cool, swirling air provides the trans~
port mechanism by which the heat transfer is accomplished.
A wire mesh having a grid of about one~quarter inch located
parallel to and about one-quarter from the backside of paper
bearing electrostatic toner in image configuration when
subject to 28 kV of high voltage from a probe located about
one inch behind the mesh will provide sufficient cooling to
prevent paper scorching during a sixty second period by a
3000°Kheat source located two inches from the face of the