Fixing device and image forming apparatus including a heating roller with multiple heaters
US7406286B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 12, 2004 |
| Grant date | Jul 29, 2008 |
| Priority date | — |
| Expiry date | Jul 1, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/2022
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a fixing device for causing a pressurizing roller to come in pressure contact with a heating roller including a central region heating heater for heating a central region and a side end region heating heater for heating a side end region on an outside of the central region, thereby fixing an unfixed toner, or an image forming apparatus comprising the fixing device, an outside of an image region of the heating roller is caused to have a peak of heat distribution of the central region heating heater and heat radiated from both side ends of the heating roller is compensated to flatten the temperature distribution of the image region, thereby preventing a deterioration in an image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.