Image Heating Apparatus, Film Used for the Apparatus, and Manufacturing Method of Flexible Resin Material for the Film
AssigneeCanon Kabushiki Kaisha
InventorsKen Nakagawa, Michio Uchida, Tomoo Akizuki, Kazuhiro Doda, Kensuke Umeda
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Abstract
An image heating apparatus, for heating, in a nip, a recording material for carrying a toner image while conveying the recording material, includes a flexible cylindrical film; a nip-forming member contacting an inner surface of the film; and a pressing member for forming the nip between itself and the film. The inner surface of the film is provided with a roughened surface portion in a region in which the nip-forming member slides on the inner surface of the film. The roughened surface portion has a skewness Rsk satisfying: Rsk<0.
Claims13
An image heating apparatus for heating, in a nip, a recording material for carrying a toner image while conveying the recording material, said image heating apparatus comprising:
- a flexible cylindrical film;
- a nip-forming member contacting an inner surface of said film;
- and
- a pressing member for forming the nip between itself and said film,
- wherein the inner surface of said film is provided with a roughened surface portion in a region in which said nip-forming member slides on the inner surface of said film, and
- wherein the roughened surface portion has a skewness Rsk satisfying:
- Rsk<0.
A flexible cylindrical film used for an image heating apparatus for heating a recording material on which a toner image is carried, said film comprising:
- a roughened surface portion, provided at an inner surface of said film, having a skewness Rsk satisfying:
- Rsk<0.
An manufacturing method of a cylindrical flexible resin material used as an innermost layer of a film for an image heating apparatus for heating a recording material on which a toner image is carried, said manufacturing method comprising:
- applying a precursor solution of the flexible resin material onto a surface of a cylindrical mold provided with a roughened surface portion having a skewness Rsk satisfying:
- Rsk<0;
- and
- heating the precursor to undergo conversion to obtain the cylindrical flexible resin material.
Dependencies are inferred from the claim text.