Fixing unit
US6889018B2 · kind B2 · utility
24Cited by
18References
17Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | May 27, 2003 |
| Grant date | May 3, 2005 |
| Priority date | — |
| Expiry date | Jun 6, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/2016
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A fixing device of the present invention has first and second thermistors which detect the temperatures at predetermined positions in the longitudinally direction of a heating roller, first and second coils which can increase independently the temperatures at the center and the end of the heating roller, a driving circuit which supply power alternately to the coils, first and second switching circuits which supply a predetermined power to each coil, a control unit, and a temperature detection circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.