Fixation heating circuit and image forming device
US12309336B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 2023 |
| Grant date | May 20, 2025 |
| Priority date | — |
| Expiry date | Feb 22, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/5004
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A fixation heating circuit includes a mains power interface; a switch circuit, a heater, and a temperature detection circuit that are connected to each other to form a heating loop. The fixation heating circuit further includes a switch control circuit; a thermistor reception terminal; and a thermistor insertion terminal. The thermistor insertion terminal includes first to fourth insertion terminals, a thermistor being connected between the first and second insertion terminals, and the third and fourth insertion terminals being connected via a wire. The thermistor reception terminal includes first to fourth reception terminals corresponding to the first to fourth insertion terminals, the first and second reception terminals being arranged in the temperature detection circuit. The temperature detection circuit is connected to the switch control circuit that is connected to the third reception terminal. The switch circuit is connected to the fourth reception terminal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.