Fixing apparatus and image forming apparatus having a roller that together with a nip portion forming member sandwiches a heating and rotating member to form nip portion
US10268149B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 5, 2018 |
| Grant date | Apr 23, 2019 |
| Priority date | — |
| Expiry date | Apr 5, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/2053
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A fixing apparatus includes a cylindrical heating rotating member, a nip portion forming member having first and second surfaces, and provided in a hollow portion of the heating rotating member so that the first surface contacts an inner surface of the heating rotating member, and a roller that, sandwiches the heating rotating member with the nip portion forming member to form a nip portion. A plurality of recessed portions are on the first surface, so a size of an area in which the first surface is in contact with the heating rotating member in an upstream area of the nip portion is less than a size of the area in which the first surface of the nip portion forming member is in contact with the heating rotating member in a downstream area of the nip portion with respect to a center of the nip portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.