Fusing circuit for driving operation of heating unit in an...

Details Fusing circuit for driving operation of heating unit in an... Fusing circuit for driving operation of heating unit in an...

2011-08-16

2011-08-16

Grainger, Quana M (Department: 2852)

Electrophotography

Machine operation

Having power supply

Reexamination Certificate

active

08000624

ABSTRACT:
An image forming apparatus is provided with: a heating unit which generates heat to fuse a toner on a printing medium; a switch which selectively supplies alternating current (AC) power to the heating unit; a first switching driver which drives the switch to supply the AC power to the heating unit; and a first supply limiter which allows the AC power to be supplied to the heating unit by the first switching driver if a polarity of the AC power is the same as a preset polarity, and cuts off the AC power supplied to the heating unit if the polarity of the AC power is opposite to the preset polarity.

REFERENCES:
patent: 2006235305 (2006-09-01), None
patent: 2007139907 (2007-06-01), None
Computer translation for JP2007-139907A, Jun. 7, 2007.
Computer translation JP2006-235305A, Sep. 7, 2006.
Chinese Office Action mailed Apr. 13, 2011 in connection with counterpart Chinese Application Partial.

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