Fixing apparatus and image forming apparatus having the same
AssigneeCanon Kabushiki Kaisha
InventorsMasanori Akita, Kazuhiro Hasegawa
Life of this patent
Estimating the term…
Abstract
A fixing apparatus including a pair of rotary members forming a nip for pinching and conveying a recording material, and a rotatable heat supplying member in contact with at least either of the rotary members and supplying the rotary member with heat. An image forming on the pinched and conveyed recording material is fixed thereto by heat, and the rotary member receiving heat from the heat supplying member has different external diameters along the longitudinal direction and the heat supplying member has different plural external diameters so as to follow the shape of the rotary member.
Claims32
A fixing apparatus comprising:
- a pair of rotary members forming a nip for pinching and conveying a recording material, wherein an image formed on the pinched and conveyed recording material is fixed by heat to the recording material;
- and
- a rotatable heat supplying member in contact with at least either of the rotary members and supplying said rotary member with heat, wherein said rotary member in contact with said heat supplying member has such a shape having different external diameters along the longitudinal direction;
- wherein said heat supplying member has a shape corresponding to the change in the external diameter of said rotary member.
A fixing apparatus comprising;
- a pair of rotary members forming a nip for pinching and conveying a recording material, wherein an image formed on the recording material is thermally fixed on the recording material by pinching and conveying of the recording material;
- and
- a rotatable heat supplying member in contact with at least either of the rotary members and supplying said rotary member with heat;
- wherein said rotary member receiving heat from said heat supplying member has such a shape having different external diameters along the longitudinal direction, and said heat supplying member has a heat distribution in the longitudinal direction, varied according to the external diameter of said rotary member.
A fixing apparatus comprising:
- a rotary fixing member for thermally fixing an image formed on a recording material thereto, wherein said rotary fixing member has a shape having different diameters along the longitudinal direction;
- a pressurizing member maintained in contact with the rotary fixing member and forming a nip for pinching and conveying the recording material;
- and
- a rotary heat supplying member maintained in contact with said rotary fixing member and supplying heat thereto;
- wherein said heat supplying member has a shape corresponding to the change in the external diameter of said rotary fixing member.
A fixing apparatus comprising:
- a rotary fixing member for thermally fixing an image formed on a recording material thereto, wherein said rotary fixing member has a shape having different diameters along the longitudinal direction;
- a pressurizing member maintained in contact with the rotary fixing member and forming a nip for pinching and conveying the recording material;
- and
- a heat supplying member maintained in contact with said rotary fixing member and supplying heat thereto;
- wherein said rotary member receiving heat from said heat supplying member has such a shape having different external diameters along the longitudinal direction, and said heat supplying member has a heat distribution in the longitudinal direction, varied according to the external diameter of said rotary member.
Dependencies are inferred from the claim text.