Image forming apparatus capable of suppressing damage to a fixing member while maintaining productivity
US10895832B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 27, 2020 |
| Grant date | Jan 19, 2021 |
| Priority date | — |
| Expiry date | May 27, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/2042
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus includes an image forming unit, a fixing device, a temperature detection device, a driving device, a printed sheet number counting unit, a fixing voltage power supply, and a control unit. The fixing device includes a fixing member constituted of a heated rotary member heated by a heating device and a pressure member contacting the heated rotary member to form a fixing nip. The temperature detection device detects surface temperature of the heated rotary member in a non-passing area. The control unit changes a productivity in two or more steps from a default setting, on the basis of an accumulated number of printed sheets from start of a productivity change mode counted by the printed sheet number counting unit, and the surface temperature of the non-passing area detected by the temperature detection device, and changes control temperature of the fixing member in accordance with the productivity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.