Fixing device for controlling fixing temperature in a stable manner
US6198888A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 1999 |
| Grant date | Mar 6, 2001 |
| Priority date | — |
| Expiry date | Sep 21, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/2041
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A belt fixing device including a fixing roller, a heating roller, an endless fixing belt spanned around the fixing roller and the heating roller and a pressing roller disposed opposing the fixing roller via the fixing belt, a heater disposed at least in the inside of the heating roller for heating the fixing belt, a heating area where the fixing belt is heated by the heating roller, a fixing area including a first fixing part where the pressing roller contacts the fixing belt without pressing the fixing roller and a second fixing part where the pressing roller presses the fixing roller via the fixing belt, a temperature detect device which detects a surface temperature of the fixing belt in the heating area, and a temperature control device which controls the surface temperature of the fixing belt in the heating area to a prescribed temperature which is higher than a lowest fixing temperature that does not cause inferior fixing, but lower than a highest fixing temperature that does not cause toner offsetting during repeated operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.