Fixing device and image forming apparatus
US10620572B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 23, 2018 |
| Grant date | Apr 14, 2020 |
| Priority date | — |
| Expiry date | Aug 23, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/80
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A fixing device includes an endless belt, a heater in contact with an inner surface of the belt and divided into a plurality of heater blocks in a width direction of the belt, a pressing member positioned to face the heater with the belt interposed therebetween and configured to press a conveyed sheet against the belt and the heater, a temperature sensor disposed in each of at least half of the heater blocks, and a processor. The processor selects heater blocks based on width and position of the conveyed sheet to form a heat generation block, controls power supplied to the heater blocks so that a temperature of the heat generation block is within a predetermined temperature range, and selects the temperature sensor disposed in a heater block having a non-paper passing region and control an excessive temperature rise in the non-paper passing region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.