Heat fixing apparatus wherein influence of temperature rise in sheet non-passing area is prevented
AssigneeCanon Kabushiki Kaisha
InventorsDaizo Fukuzawa, Atsushi Iwasaki
Life of this patent
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Abstract
A heat fixing apparatus has a pair of movable fixing members for forming a nip; wherein a recording material, bearing an unfixed image, is passed through the nip to fix the unfixed image to the recording material; and a controller for moving the fixing members after a continuous fixing operation for a plurality of recording materials; wherein time of the fixing members being moved after the completion of a continuous fixing operation for a plurality of recording materials of a second size which is smaller than a first size is longer than time of the fixing members being moved after the completion of a continuous fixing operation for a plurality of recording materials of the first size.
Claims17
A heat fixing apparatus comprising:
- a pair of movable fixing members for forming a nip;
- wherein a recording material, bearing an unfixed image, is passed through said nip to fix by heat the unfixed image to the recording material;
- and
- controlling means for moving said fixing members after completion of a continuous fixing operation for a plurality of recording materials;
- wherein a period of said fixing members being moved after the completion of a continuous fixing operation for a plurality of recording materials of a second size which is smaller than a first size is longer than a period of said fixing members being moved after the completion of a continuous fixing operation for a plurality of recording materials of the first size, irrespective of a setting of a next fixing operation.
A fixing apparatus comprising:
- a pair of movable fixing members for forming a nip;
- means for raising the temperature of said fixing members by supplying electric power;
- and
- wherein a recording material of a first size, or a recording material of a second size which is smaller than the first size, bearing an unfixed image, is passed through said nip to fix by heat the unfixed image to the recording material;
- wherein after the completion of a continuous fixing operation for a plurality of recording materials of the second size, the electric power supply to said temperature raising means is stopped, and the fixing operation is prohibited, for a predetermined period, irrespective of setting of a next fixing operation.
Dependencies are inferred from the claim text.