Fixing apparatus
US6724999B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Apr 22, 2002 |
| Grant date | Apr 20, 2004 |
| Priority date | — |
| Expiry date | Apr 22, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/2006
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A fixing apparatus is provided with a fixing device which includes a fixing roller and a pressing roller pressed against the fixing roller, the fixing roller and the pressing roller defining a region through which sheets of various sizes pass while being heated, an induction-heating device which heats the fixing roller by induction heating and which includes first and second excitation coil units provided inside the fixing roller and spaced from each other by a predetermined distance in an axial direction of the fixing roller, and a control device which varies an output applied to the first and second excitation coils in accordance with a surface temperature as measured in the axial direction of the fixing roller. The first and second excitation coil units have widths which are greater than those of maximal-size sheets by 20 to 40 mm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.