Fixing device
US12044991B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 13, 2023 |
| Grant date | Jul 23, 2024 |
| Priority date | — |
| Expiry date | Apr 13, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/2053
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A fixing device includes an endless and rotatable belt of which an inner peripheral surface is applied with lubricant, a heater, a rotatable member to rotatably contact the belt and a nip forming member in contact with the inner peripheral surface of the belt. The nip forming member includes a holding portion, an upstream sliding portion and a downstream sliding portion. The downstream and upstream sliding portions have first and second sliding surfaces sliding with the inner peripheral surface of the belt, respectively. The second sliding surface has a curved shape, and when a force applied to the belt with respect to a length of the second sliding surface is defined as w (N/mm) and a curvature radius of the second sliding surface is defined as R (mm), R/w of the second sliding surface is equal to 5 (mm2/N) or larger and equal to 80 (mm2/N) or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.