Heater and image heating apparatus including same
US8698046B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2010 |
| Grant date | Apr 15, 2014 |
| Priority date | — |
| Expiry date | Dec 20, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/2035
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The image heating apparatus includes a heater that achieves even heat-generation distribution and suppression of a non-sheet feeding portion temperature increase when an image is printed on a sheet whose size is smaller than a maximum size for the apparatus, and an endless belt, wherein plural heat-generation resistive members having positive temperature coefficients are connected in parallel are provided between first and second conductive members provided along a longitudinal direction of a substrate; plural heat-generation blocks including the plural heat-generation resistive members connected in parallel, are arranged in series along the longitudinal direction; and in the plural heat-generation resistive members included in one of the heat-generation blocks, a heat-generation resistive member arranged at an end portion in the longitudinal direction has a resistivity value higher than that of a heat generation resistive member arranged at a center in the longitudinal direction, or an interval between heat generation resistive members is larger in the end portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.