Electrophotography – Machine operation – Having power supply
Reexamination Certificate
2005-05-24
2005-05-24
Beatty, Robert (Department: 2852)
Electrophotography
Machine operation
Having power supply
C219S216000, C219S541000, C399S330000
Reexamination Certificate
active
06898390
ABSTRACT:
A power supply unit for a fusing roller of an electrophotographic image forming apparatus, which is electrically connected to a heat-generating portion for generating heat to raise the temperature of the fusing roller to an appropriate level at which a toner image is fused and for transmitting electric current from an external power source to the heat-generating portion, includes: a connecting portion installed at a center of each of two end caps fit around ends of the fusing roller and electrically connected to the heat-generating portion; a holder connected to the connecting portion, the holder installed in a frame, the frame supporting or mounting the fusing roller, and an elastic unit for providing elastic force to make the holder elastically contact the connecting portion. The power supply unit provides improved durability and operating safety under electrical and mechanical stresses caused by current, residual heat and thermal impacts.
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Kim Dong-woo
Lee Kyung-woo
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