Image forming apparatus with a plurality of individually-controlled heat generating resistors having different temperature coefficients of resistance
US10942476B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2019 |
| Grant date | Mar 9, 2021 |
| Priority date | — |
| Expiry date | Dec 16, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/2042
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In an image forming apparatus including an image heating portion that heats an image formed on a recording material using heat of a heater constituted of a substrate and a plurality of heat generating resistors disposed on the substrate, the plurality of heat generating resistors include (i) a first heat generating resistor that has a first temperature coefficient of resistance, and (ii) a second heat generating resistor that has a second temperature coefficient of resistance which is smaller than the first temperature coefficient of resistance, and heats a second heating region of which width in the longitudinal direction of the substrate is narrower than the first heating region which is heated by the first heat generating resistor, among the plurality of heating regions heated by the plurality of heat generating resistors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.