| 摘要 |
PROBLEM TO BE SOLVED: To provide a heating device which can ensure high reliability by preventing the deterioration and breakage of a heater, a stay, a film, a pressure roller, etc. SOLUTION: The heating device is provided with: a heating body; the support of this heating body; a heat-resistant fixing film which is in contact with the heating body and slides over the heating body; a pressing member which drives the fixing film and brings a material to be heated in contact with the heating body through the fixing film; a first thermometer which detects the temperature of the heating body; a means to control the current to the heating body on the basis of the temperature detected with the first thermometer; a second thermometer provided in a position different from the position of the first thermometer in the longitudinal direction of the heating body and being in contact with the sliding surface of an unfixed film of the heating body; and a support of the second thermometer. The material to be heated is heated by allowing the fixing film and the material to be heated to pass together through the nip part formed by the heating body and the pressing member. The space between the support of the second thermometer and the support of the heating body at the outside of the longitudinal direction is disposed more outwardly in the longitudinal direction of the heat generating area of the heating body.
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