Image forming apparatus that fixes toner image to recording medium using first and second heaters supplied with current during overlapping time periods
US11914315B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 19, 2022 |
| Grant date | Feb 27, 2024 |
| Priority date | — |
| Expiry date | Jul 19, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/2038
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a caser where a first current is supplied to a first heater, a controller gradually increases the first current in a first period, supplies the first current based on a first duty cycle in a second period, and gradually reduces the first current to stop supplying the first current in a third period. In a case where a second current is supplied to a second heater, the controller gradually increases the second current in a fourth period, supply the second current based on a second duty cycle in a fifth period, and gradually reduces the second current to stop supplying the second current in a sixth period. The controller controls the supply of the second current such that part of the fourth period overlaps with the third period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.