Fixing device controlling frequency of AC current caused to flow through helical coil causing electroconductive layer of rotatable member to generate heat through electromagnetic induction
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United States of America Patent
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Sep 6, 2016
Grant Date -
Mar 3, 2016
app pub date -
Aug 27, 2015
filing date -
Aug 28, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
A fixing device includes: a rotatable member; a helical coil; a magnetic core; and a controller for controlling the frequency of an AC current caused to flow through the coil. The AC current is caused to flow through the coil to cause an electroconductive layer of the rotatable member to generate heat through electromagnetic induction heating, thereby heating and fixing the toner image on the recording material by heat of the rotatable member. The controller controls the frequency in a period so that when the frequency is f and a resistance of the electroconductive layer with respect to a circumferential direction is R, f/R is substantially constant.
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