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US 5,148,226 AGranted
Heating apparatus using endless film
AssigneeCanon Kabushiki Kaisha
InventorsTakeshi Setoriyama, Akira Kuroda
Life of this patent
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Abstract
An image heating apparatus includes a heater; a film movable together with a recording material; a driving rotatable member cooperative with the film to form a nip therebetween, whereby an image on a recording material being passed through the nip is heated by heat from the heater through the film; wherein the driving member has a circumferential length which increases toward longitudinal ends thereof.
Claims29
An image heating apparatus, comprising:
- a heater;
- a film movable together with a recording material;
- a driving rotatable member cooperative with said film to form a nip therebetween, whereby an image on the recording material being passed through the nip is heated by heat from said heater through said film;
- wherein said driving member has a circumferential length which increases toward longitudinal ends thereof.
1 more element
An image heating apparatus, comprising:
- a heater which is stationary in use;
- a film in sliding contact with said heater;
- a driving rotatable member cooperative with said film to form a nip therebetween, whereby an image on a recording material being passed through the nip is heated by heat from said heater through said film;
- a feeding rotatable member for feeding the recording material passed through the nip;
- wherein a first peripheral speed of said feeding rotatable member is smaller than a second peripheral speed of said driving member.
2 more elements
An image heating apparatus, comprising:
- a heater which is stationary in use;
- a film in sliding contact with said heater;
- a driving rotatable member cooperative with said film to form a nip therebetween, whereby an image on a recording material being passed through the nip is heated by heat from said heater through said film;
- wherein a friction coefficient between said film and said driving rotatable member is larger than a friction coefficient between said film and said heater.
1 more element
An image heating apparatus, comprising:
- a heater which is stationary in use;
- a film in sliding contact with said heater;
- a back-up rotatable member cooperative with said film to form a nip therebetween, whereby an image on a recording material being passed through the nip is heated by heat from said heater through said film;
- wherein said nip is longer than a width of said film.
1 more element
Dependencies are inferred from the claim text.