Electrophotography – Control of electrophotography process – Control of fixing
Reexamination Certificate
2005-12-21
2008-08-12
Tran, Hoan H (Department: 2852)
Electrophotography
Control of electrophotography process
Control of fixing
C399S328000
Reexamination Certificate
active
07412181
ABSTRACT:
A fusing apparatus includes a fuser roll and a pressure roll which define a nip therebetween. Two heating elements heat the fuser roll. One of the heating elements is configured for heating a first portion of the fuser roll while a second of the heating elements is configured for heating a second portion of the fuser roll. The second portion of the fuser roll is axially spaced from the first portion. A temperature sensing system monitors a temperature of the fuser roll in a first location and monitors a temperature of the fuser roll in a second location which is axially spaced from the first location. A control system determines an amount of power to supply to the first heating element as a function of the monitored temperatures at the first and second axially spaced locations and determines an amount of power to supply to the second heating element as a function of the monitored temperatures at the first and second axially spaced locations.
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Baxter Nicholas
Brede Riley
Callis Martin
Mulder Pieter
Pitts Ian
Fay Sharpe LLP
Tran Hoan H
Xerox Corporation
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