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US 4,544,828 AGranted
Heating device
AssigneeCanon Kabushiki Kaisha
InventorsMichio Shigenobu, Hiroshi Satomura
Life of this patent
Estimating the term…
Abstract
A heating device for heating an object with a heating element composed of ceramic particles having a positive temperature coefficient of resistance dispersed in a binder.
Claims32
A heating device comprising:
- a heat generating element including a non-organic binder having dispersed therein and in electrically contacting state ceramic particles which have PTC characteristics, said element being formed by pulverizing ceramic sintered so as to have PTC characteristics, dispersing said PTC particles in said binder, and being incorporated at a temperature lower than the sintering temperature so as integrally to form the element while retaining the binder therein;
- and electrical means for applying a voltage across said heat generating element to cause heat generation without dissipation of the binder, wherein said heating device provides a substantially uniform heat distribution.
Dependencies are inferred from the claim text.