Electrophotography – Control of electrophotography process – Control of fixing
Reexamination Certificate
2008-01-29
2008-01-29
Gray, David M. (Department: 2852)
Electrophotography
Control of electrophotography process
Control of fixing
C399S069000, C399S070000, C399S320000
Reexamination Certificate
active
07324770
ABSTRACT:
A printing apparatus including a heat roller, a pressure roller, a fusing apparatus, and a method of controlling a fusing temperature of the printing apparatus. The printing apparatus includes a heat roller, a first temperature sensor which senses a temperature of the heat roller, a first heat source which is installed inside the heat roller, a second heat source which is installed inside the heat roller and has a lower heat capacity than the first heat source, a pressure roller, and a control unit which controls the first and second heat source based on the temperature sensed by the first temperature sensor. The printing apparatus further includes a third heat source which is installed inside the pressure roller, wherein the control unit controls the first, second and third heat sources to reduce a warm-up time, power consumption, flicker and overshoot, while providing a stable fusing operation.
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Blackshire David A
Gray David M.
Roylance Abrams Berdo & Goodman LLP
Samsung Electronics Co,. Ltd.
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