Image heating device
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United States of America Patent
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Sep 16, 2014
Grant Date -
May 2, 2013
app pub date -
Oct 22, 2012
filing date -
Oct 26, 2011
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
In an image heating device (F) employing an induction heating system, which includes a heating rotary member (15, 15A) and a magnetic flux generating unit including a coil and a magnetic core (12), when an area of a surface of a leading end portion of the core (12) on a side opposed to the heating rotary member (15) is large, the time change of the magnetic flux to act on the heating rotary member does not increase. As a result, the heat generation efficiency of the heating rotary member may be suppressed. To resolve this problem, the core (12) includes a second core portion (12a) protruding toward the heating rotary member and including, on a leading end side of a convex-shaped part, a leading end protruding portion (12d) which has a width smaller than a width of a root portion (12b) of the convex-shaped part in a circumferential direction.
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Cited Art Landscape
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