Electrophotography – Control of electrophotography process – Control of fixing
Patent
1998-07-10
1999-11-09
Brase, Sandra
Electrophotography
Control of electrophotography process
Control of fixing
399320, G03G 1520
Patent
active
059830484
ABSTRACT:
A temperature droop compensated NFFR fuser having a preheater structure which conveys the substrate carrying toner images past a radiant heat contained therein and then into the nip of a pair of pressure engaged fuser rollers that form the NFFR fuser. One of the fuser rollers is heated by an internal heater which is supplied a constant level of power which generally maintains the temperature of the heated roller to a temperature sufficient to fuse the toner images on the substrate. The preheater structure warms the substrate carrying toner images prior to entry into the nip of the fuser rollers to compensate for the temporary temperature droop of the fuser rollers that is encountered when the fuser moves from a standby mode to an operating mode. The combination of pre-warmed substrate and the temperature to which the heated fuser roller droops is sufficient to completely fuse the toner images on the substrate. With time in the operating mode, the fuser rollers recover from droop and the radiant heat source in the preheater structure is turned off.
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Brase Sandra
Xerox Corporation
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