Thermostatic device for fuser
US5019692A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 1990 |
| Grant date | May 28, 1991 |
| Priority date | — |
| Expiry date | Mar 29, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H1/5833
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A thermostatic device particularly usable in sensing the surface tempoerature of a rotatable member in a fuser includes a rotatable roller mountable in rolling engagement with a moving surface. A heat sensor located inside the roller senses temperature variations in the roller. For example, a pin that is spring-urged against the inside surface of the roller, moves a switch between open and closed conditions as the inside diameter of the roller varies with a change in its temperature. Alternatively, a bimetallic disc positioned in engagement with the inside surface of the roller is sensed to open or close a switch in response to the roller temperature reaching a given threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.