Patent ID: 8299403

Claim:
A heating device, wound around the body and/or exhaust pipe of a vacuum device and capable of heating an outer wall of the body and/or exhaust pipe of the vacuum device to 100° C. or above, the heating device comprising: an electric heater disposed along the outer wall of said body and/or exhaust pipe of the vacuum device; and a heat resisting vacuum insulator wound around an outer periphery of said electric heater, wherein said electric heater has a resistance heating element and a heat resisting electric insulator covering said resistance heating element, and wherein said heat resisting vacuum insulator comprises a hollow platy covering material air-tightly sealed thereinside by a metal sheet having a heat resisting temperature of at least 100° C. and a fibrous, granular or micro-balloon-shaped filling material filled in the hollow portion of said covering material and having a heat resisting temperature of at least 100° C., and the inside of said covering material is kept in a vacuum state.