# US 2018/0024482 A1 · Fixing apparatus and image forming apparatus having the same

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- Number: US 2018/0024482 A1
- Document ID: US20180024482A1
- Status: Published application
- Kind: A1
- Application number: 15/648,358
- Filed: 2017-07-12
- Published: 2018-01-25
- Earliest claimed: 2016-07-21
- Assignees: Canon Kabushiki Kaisha
- Applicants: Canon Kabushiki Kaisha
- Inventors: Atsushi Nakamoto; Satoshi Nishida; Isamu Takeda; Hideo Nanataki; Akimichi Suzuki
- Web page: https://patentgrep.com/patent/US20180024482A1

## CPC

- G03G 15/2028: {with means for handling the copy material in the fixing nip, e.g. introduction guides, stripping means}
- G03G 15/2053: {Structural details of heat elements, e.g. structure of roller or belt, eddy current, induction heating}
- G03G 15/2064: {combined with pressure}
- G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY

## Abstract

A fixing apparatus for fixing an image onto recording material, includes a heating rotary member, film of a cylindrical shape, and pressure member configured to press the film from inside the film toward the heating rotary member to form a nip portion as an area where the heating rotary member and film contact. The pressure member includes a metallic member extending from an upstream side of a center in a recording material conveyance direction of the nip portion to a downstream side, wherein the recording material on which the image is formed is conveyed while being heated at the nip portion to fix the image onto the recording material. A center of gravity of the metallic member is on the upstream side of the center in the recording material conveyance direction of the nip portion in a cross-section perpendicular to a rotation axis direction of the heating rotary member.

## Claims

### Claim 1

A fixing apparatus for fixing an image onto a recording material, the fixing apparatus comprising:
a heating rotary member;
a film having a cylindrical shape; and
a pressure member that presses the film from inside the film toward the heating rotary member to form a nip portion which is an area where the heating rotary member and the film contact, the pressure member including a metallic member extending from an upstream side of a center of the nip portion to a downstream side of the center of the nip portion in a recording material conveyance direction,
wherein the recording material on which the image is formed is conveyed while being heated at the nip portion to fix the image onto the recording material, and
wherein in a cross section perpendicular to a rotation axis direction of the heating rotary member, a center of gravity of the metallic member is on the upstream side of the center of the nip portion in the recording material conveyance direction.

### Claim 2 (depends on 1)

The fixing apparatus according to claim 1,
wherein the metallic member has a portion where thickness thereof in a pressure direction at the nip portion is thicker in an area on the upstream side of the center of the nip portion than an area on the downstream side of the center of the nip portion.

### Claim 3 (depends on 1)

The fixing apparatus according to claim 1,
wherein the pressure member includes a resin member that supports the metallic member and press the film toward the heating rotary member on a downstream side of the metallic member in the recording material conveyance direction.