Heater and image heating device including the same
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United States of America Patent
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Aug 4, 2015
Grant Date -
Dec 26, 2013
app pub date -
Mar 5, 2012
filing date -
Mar 10, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
In order to suppress excessive temperature rise at a non-sheet-passing region while suppressing the deterioration of fixability in case of heating small size sheets, a heater includes a first heat-generation line and a second heat-generation line, which are independently controllable, wherein the first heat-generation line is configured so that a plurality of heat-generation resistors having positive resistance-temperature characteristics is electrically connected in parallel to each other between a first electro-conductive element and a second electro-conductive element, and the heat-generation resistors are adjusted so that a heat-generation amount per unit length of the first heat-generation line in a lengthwise direction of the heater decreases from a recording material conveyance reference towards a end portion in the lengthwise direction, and an image heating device having the heater.
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