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US 6,775,509 B2Granted
Image heating apparatus
AssigneeCanon Kabushiki Kaisha
InventorsTomonori Shida, Akihiko Takeuchi, Masahiro Suzuki
Life of this patent
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Abstract
An image forming apparatus includes a sliding member, and a pressure member which, together with the sliding member, forms a nip part, wherein a sliding surface of the nip part of the sliding member is crown shaped along a longitudinal direction of the sliding member, and the pressure roller is an inverse crown shape along the longitudinal direction. In accordance therewith, wrinkles in a recording material and springing-up of a conveying direction of the recording material can be suppressed.
Claims7
An image heating apparatus for heating an image formed on a recording material, comprising:
- flexible rotating member;
- sliding member, disposed at an interior of the flexible rotating member, for sliding with the rotating member;
- and
- a pressure roller for forming a nip part via the flexible rotating member together with sliding member,
- wherein a sliding surface of the nip part of the sliding member is crown shaped along a longitudinal direction of the sliding member, and the pressure roller is an inverse crown shape along the longitudinal direction, and between a crown amount cr per unit length of the crown shaped portion of the sliding member and an inverse crown amount cr per unit length of the pressure roller, there is the relationship:
- 1.00×10−3≦cr−4cr′≦4.0×10−3.
3 more elements
Dependencies are inferred from the claim text.