Fixing device and image forming apparatus with heating member heated uniformly in circumferential direction
US8064798B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 8, 2009 |
| Grant date | Nov 22, 2011 |
| Priority date | — |
| Expiry date | Jan 14, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/2035
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a fixing device, a belt moves in a predetermined direction to heat and melt a toner image on a recording medium. A pressing rotary member is pressed against the belt to form a nip portion to nip and convey the recording medium bearing the toner image. A heating member is fixedly provided inside a loop formed by the belt and faces an inner circumferential surface of the belt. The heating member is heated by a heater to heat the belt. The heating member includes a primary heating portion directly heated by the heater, and a secondary heating portion heated by heat conducted from the primary heating portion. The primary heating portion and the secondary heating portion are provided in a circumferential direction of the heating member. The secondary heating portion has a heat capacity smaller than a heat capacity of the primary heating portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.