Image forming apparatus with an induction heating fixing unit for shortening warm up time
US6763206B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | May 14, 2002 |
| Grant date | Jul 13, 2004 |
| Priority date | — |
| Expiry date | Aug 1, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B6/145
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A heating apparatus includes first and second coil members, first and second temperature detectors and an output controller. The detectors detect temperature of the coil members. The output controller supplies the first coil member with a first specified output until the first temperature detector detects that the first coil member heats the object. The second coil member is not supplied with a second specified output during this time. When the object reaches a specified temperature, the first specified output stops being supplied to the first coil member and the second specified output is supplied to the second coil member. The temperature of an area heated by the second coil member reaches a specified temperature. A comparison is made between temperatures detected by the first and second temperature detectors. The coil members are alternately supplied with first and second specified outputs to heat the object's area indicating a lower temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.