The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 30, 1976
Filed:
Mar. 21, 1975
Masaki Sato, Tokyo, JA;
Haruhisa Hayashi, Tokyo, JA;
Kureha Kagaku Kogyo Kabushiki Kaisha, Tokyo, JA;
Toyo Boseki Kabushiki Kaisha, Osaka, JA;
Abstract
A heating assembly having a protector for its sheet-type heating element, which is made from a sheet containing certain electroconductive fibrous or particulate materials such as carbon fibers. A detector element is formed on an intermediate resin layer having a negative temperature coefficient of resistivity, and two electrode layers are adhered to the opposite surfaces of the intermediate layer. The detector element is combined with or adhered to the sheet-type heating element, so that the whole surface of the heating element is completely covered thereby. A controlling circuit is connected between the detector element and the sheet type heating element.