| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat fixing device which can stably convey a film by preventing a slip between a heat-resisting film and a heated material. SOLUTION: A film heating type heat fixing device which has a heat-resisting film, a heating body, and a pressure rotary body, and the heated material is introduced between the external surface of a film at a press-contact nip part and the pressure rotary body, and moved through the press-contact nip part together with the film to impart the heat energy of the heating body to the heated material through the film, is provided with an escape area which is a size smaller than the external diameter of the pressure rotary body on both sides of the pressure rotary body nearby outside the maximum passage area of the heated material; and an end part of a coating layer as a release layer provided in the passage area of the heated material on the surface of the pressure rotary body is positioned at the escape part and the coefficient of friction of the surface of the pressure rotary body on both the outsides of the escape part is made larger than that of the coating layer.
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