Induction heat fixing device
US6026273A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 15, 1998 |
| Grant date | Feb 15, 2000 |
| Priority date | — |
| Expiry date | Jan 15, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/2041
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A fixing device includes a conductive and magnetic hollow roller, a metallic layer made of high thermal conductive material formed on the outer surface of the hollow roller, and a magnetic field generating coil provided in the hollow roller to generate eddy current on the hollow roller. A power source applies high-frequency current to the magnetic field generating coil and a pressure roller contacts the hollow roller in a specified nipping width. Also provided is a fixing device with a second hollow roller fitted to the outer surface of a first hollow roller, a coil provided in the first hollow roller, a current source for selectively applying current of at least two frequencies, and a third roller contacting the second roller in a specified nipping width.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.