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:
Dec. 05, 2006
Filed:
Aug. 13, 2003
Toshihiro Keishima, Kobe, JP;
Akira Kataoka, Sanda, JP;
Katsuyuki Aihara, Akashi, JP;
Nobuyoshi Makio, Miki, JP;
Kazuya Gotou, Kato-gun, JP;
Toshihiro Keishima, Kobe, JP;
Akira Kataoka, Sanda, JP;
Katsuyuki Aihara, Akashi, JP;
Nobuyoshi Makio, Miki, JP;
Kazuya Gotou, Kato-gun, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An induction heating coil having little high-frequency loss and producing little hast is easily manufactured by covering a conductor with a first insulating material to form a wire, then bundling and twisting such wires to form a stranded wire, covering the outer surface of the stranded wire with a second insulating material to form a coil wire, winding the coil wire a certain number of turns into a coil portion having a certain shape. The end portion of the coil portion and a connecting portion are heated with Joule heat while applying pressure to the end portion at the same time, so that the first and second insulating materials are fused and pressure-bonded to the conductor. Thus a terminal portion for the external connection of the coil portion is fixed while keeping the electrical connection with the conductor. Accordingly, an induction heating coil of low cost and stable quality can be easily manufactured. The induction heating coil producing little heat because of its high-frequency loss and suitable for induction heating of a highly-conductive nonmagnetic substance such as aluminum.