Contact-type temperature detector

Abstract

Abstract PURPOSE: To detect the temperature of a fixing roller without damaging it by providing a resin sheet to contact with the object to be measured, a hollow elastic member for pressing the sheet, and a heat-sensitive element for detecting the surface temperature of the object to be measured between the sheet and the elastic member. CONSTITUTION: A heat-resisting resin sheet 1 and an adiabatic elastic member 3 are held by means of a holding member 2, the elastic member 3 being provided with a hollow 3S. A heat-sensitive element 4 is sandwiched by both planes of the resin sheet 1 and the elastic member 3. A pair of fixing rollers is formed of a fixing roller 6 as an object measured and a roller 11. The periphery of the heat-sensitive element 4, which is all made of resin, has a small heat capacity, so that a high sensitivity can be obtained, and the elastic member 3 permits the resin sheet 1 to constantly contact closely with the object measured along its surface. Since the air in the hollow 3S has a smaller heat capacity than the elastic body 3, it can be independent of the open air temperature, and since the hollow 3S equalizes the pressure on the sheet 1 when the device is pressed to the roller 6, the damage to the sheet 1 and the heat- sensitive element 4 can be prevented. COPYRIGHT: (C)1981,JPO&Japio

Inventors

• 👤 Tsukasa Kuge
• 👤 Masaaki Sakurai
• 👤 Noriyuki Ishihara
• 👤 Hiroyuki Adachi
• 👤 Michiro Shigenobu

Bibliographic Details