RADIATION TRANSFER FUSER TEMPERATURE SENSOR
Original Publication Date: 1980-Dec-31
Included in the Prior Art Database: 2004-Apr-02
Xerox Disclosure Journal
In order to measure the temperature of the heated pressure fusing roller of a xerographic copier-duplicator device, it is common practice to use a non-contacting sensor instead of a contacting sensor. Typically, thermistors or other devices are used wherein the electrical properties of the device are a function of their temperature. In general, with such devices the mode of energy transfer is by thermal conduction through the separating air layer, and thermal radiation effects are minimized. A major disadvantage of this approach is that the output of the thermal sensing device is a very sensitive function of the spacing between the sensors and the heated surface whose temperature is to be measured. In addition, the time constant of the device response is long.