Fixing device of image forming apparatus
US7522854B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jan 8, 2008 |
| Grant date | Apr 21, 2009 |
| Priority date | — |
| Expiry date | Jan 19, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/2032
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A fixing apparatus of an image forming apparatus of the present invention, in arrival timing of a temperature falling area of a heat roller passing a nip at opposite position γ of an induction heating coil from temperature detection position β by an infrared temperature sensor around the heat roller, according to detection results by the infrared temperature sensor, controls an output value of the induction heating coil under control of an inverter circuit, heats and returns the heat roller in real time to a fixable temperature, and realizes energy conversation. At the time of arrival at the nip, the heat controller is always set to a fixed fixable temperature, thus in a fixed image, a high image quality free of ripple marks can be obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.