Fixing apparatus with pressure state detection and control
US8041237B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 22, 2009 |
| Grant date | Oct 18, 2011 |
| Priority date | — |
| Expiry date | Jun 4, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/2032
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In one embodiment, a fixing apparatus is configured of a pressing portion for causing the pressure roller to enter a pressure applied state by applying bias, a switching portion for causing the pressing portion in the pressure applied state to enter a pressure released state by causing a cam to rotate forward, a pressure state detection portion for detecting the pressure released state, and a control portion for, when shifting from the pressure applied state to the pressure released state, turning forward the cam of the switching portion in the pressure applied state and stopping the cam after the pressure state detection portion detects the pressure released state. If the cam is turned forward with respect to the switching portion for a certain time period, but the pressure state detection portion does not detect the pressure released state, the control portion performs forward rotational direction retry control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.