Image heating apparatus
AssigneeCanon Kabushiki Kaisha
InventorsYasumasa Ohtsuka, Yohji Tomoyuki, Hideyuki Yano, Manabu Takano, Mahito Yoshioka, Osamu Mukataka, Kenichi Ogawa, Yasunari Watanabe
Life of this patent
Estimating the term…
Abstract
An image heating apparatus includes a heater provided with a heat generating element generating heat upon electric energization to a base; a supporting member for supporting the heater; a back-up member press-contacted to the heater; wherein an image on a recording material is heated by heat from the heater; wherein at least such a portion of the supporting member as supports the heater is of thermoplastic material.
Claims31
An image heating apparatus, comprising:
- a heater including a base, and a heat generating element, on said base, for generating heat upon electric energization;
- a supporting member for supporting said heater;
- a back-up member provided within a length of said heat generating element;
- wherein said supporting member and said back-up member are urged toward each other with said heater interposed therebetween, and wherein a recording material carrying an image is passed through between said heater and said back-up member so that the image is heated;
- wherein said supporting member includes a supporting portion of a thermoplastic material for supporting said heater and a non-thermoplastic portion on said supporting portion, and said non-thermoplastic portion has a length smaller than that of said heat generating element and is provided within the length of said heat generating element.
An image heating apparatus, comprising:
- a heater including a base and a heat generating element, on said base, for generating heat upon electric energization, wherein an image on a recording material is heated by heat from said heater;
- a supporting member for supporting said heater, said supporting member being provided with a longitudinal recess into which said heater is engaged;
- wherein said recess has at least one stepped portion at a lateral end, and said recess has widths which are different before and after the stepped portion.
An image heating apparatus, comprising:
- a heater including a base and a heat generating element, on said base, for generating heat upon electric energization;
- a supporting member for supporting said heater;
- and
- a back-up member provided within a length of said heat generating element;
- wherein said supporting member and said back-up member are urged toward each other with said heater interposed therebetween, and wherein a recording material carrying an image is passed through between said heater and said back-up member so that the image is heated;
- wherein said supporting member includes a supporting portion of a thermoplastic material for supporting said heater and a recess which is recessed away from said heater, wherein said back-up member ends at a position of an end of said recess.
An image heating apparatus, comprising:
- a heater including a base and a heat generating element, on said base, for generating heat upon electric energization, wherein an image on a recording material is heated by heat from said heater;
- and
- a supporting member for supporting said heater, said supporting member being provided with a recess into which said heater is engaged,
- wherein said base and said recess are out of contact from each other, and are brought into contact by deformation upon abnormal temperature rise.
Dependencies are inferred from the claim text.