Image fixing device and image forming apparatus with same
AssigneeCanon Kabushiki Kaisha
InventorsKanji Yano, Yasutsugu Saijo, Kensaku Kusaka, Hiromitsu Hirabayashi
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Abstract
An image fixing apparatus includes a heating device, a non-endless film movable together with a toner image supporting medium, wherein the toner image on the supporting medium is heated by the heating device through the film, a rewinding device for rewinding the film in a direction opposite to a movement direction of the toner image supporting medium, and a pressing device for press-contacting the film to the heating device and to the image supporting medium, wherein the rewinding device rewinds the film while the pressing device does not perform its pressing operation.
Claims42
An image fixing apparatus, comprising:
- heating means;
- a non-endless film movable together with a toner image supporting medium supporting a toner image, wherein the toner image on the supporting medium is heated by said heating means through said film;
- rewinding means for rewinding said film in a direction opposite to a movement direction of said toner image supporting medium;
- pressing means for press-contacting said film to said heating means and to said image supporting medium;
- wherein said rewinding means rewinds said film while said pressing means does not perform it pressing operation.
An image fixing apparatus, comprising:
- heating means;
- a non-endless film movable together with a toner image supporting medium supporting a toner image, wherein the toner image on the supporting medium is heated by said heating means through said film;
- rewinding means for rewinding said film in a direction opposite to a movement direction of the toner image supporting medium;
- and
- wherein during a rewinding operation by said rewinding means, said heating means is not energized.
An image fixing apparatus, comprising:
- heating means;
- a non-endless film movable together with a toner image supporting medium supporting a toner image, wherein the toner image on said supporting medium is heated by said heating means through said film;
- rewinding means for rewinding said film in a direction opposite to a movement direction of the toner image supporting medium;
- wherein said rewinding means rewinds said film each time a predetermined number of said toner image supporting mediums are fixed.
An image forming apparatus, comprising:
- means for forming an unfixed toner image on a image supporting medium;
- fixing means for fixing the unfixed toner image on said supporting medium;
- said fixing means comprising:
- heating means;
- a non-endless film movable together with a toner image supporting medium supporting a toner image wherein the toner image on said supporting medium is heated by said heating means through said film;
- rewinding means for rewinding said film in a direction opposite to a movement direction of the toner image supporting medium;
- wherein said rewinding means rewinds said film upon a power switch of said image forming apparatus is actuated.
An image fixing apparatus, comprising:
- heating means;
- a non-endless film movable together with a toner image supporting medium supporting a toner image, wherein the toner image on said toner image supporting medium is heated by said heating means through said film;
- rewinding means for rewinding said film in a direction opposite to a movement direction of said supporting medium;
- wherein said rewinding means rewinds said film at a speed higher than a speed of said film during its image fixing operation.
An image forming apparatus, comprising:
- means for forming an unfixed toner image on a toner image supporting medium;
- fixing means for fixing the unfixed toner image on said supporting medium, said fixing means comprising:
- heating means;
- a non-endless film movable together with the supporting medium, wherein the unfixed toner image on said supporting medium is heated by said heating means through said film;
- rewinding means for rewinding said film in a direction opposite to a movement direction of said supporting medium;
- wherein said image forming apparatus is capable of an intermittent mode operation wherein one image formation is performed intermittently and a continuous mode wherein plural image forming operations are performed continuously;
- wherein said rewinding means rewinds said film each time a predetermined of the supporting mediums are fixed, and wherein the predetermined number is larger in said continuous mode than in the intermittent mode.
An apparatus according to Clam 38, wherein said rewinding means rewinds said film while said pressing means does not perform its pressing function.
Dependencies are inferred from the claim text.