Malfunction detecting device in use for the fixing device of an image-forming apparatus
US4745430A · kind A · utility
Assignees
Inventor
Key dates
| Filing date | Oct 24, 1986 |
| Grant date | May 17, 1988 |
| Priority date | — |
| Expiry date | Oct 24, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D23/24
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A temperature control device uses a thermo-sensitive element to detect the temperature of an imaging system heated fixer device member. A comparator compares the potential generated by the thermo-sensitive element corresponding to the detected temperature with a reference voltage to set the temperature of the heated member to a predetermined level. A signal representing the comparison result is used for controlling the temperature of the heated member. Any abnormality of the heated member is detected on the basis of the output signal from an oscillator producing a signal which changes the reference potential at predetermined periods and from the comparator output signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.