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. 30, 2008
Filed:
Jan. 12, 2007
Tomoji Kumano, Kitakyushu, JP;
Chikara Kaido, Futtsu, JP;
Hiroyasu Fujii, Kitakyushu, JP;
Kazutaka Higashine, Tokyo, JP;
Osamu Tanaka, Kitakyushu, JP;
Norikazu Fujii, Kitakyushu, JP;
Kazufumi Hanzawa, Kitakyushu, JP;
Masayoshi Tanaka, Tokyo, JP;
Yuji Kubo, Futtsu, JP;
Noriko Yamada, Futtsu, JP;
Tomoji Kumano, Kitakyushu, JP;
Chikara Kaido, Futtsu, JP;
Hiroyasu Fujii, Kitakyushu, JP;
Kazutaka Higashine, Tokyo, JP;
Osamu Tanaka, Kitakyushu, JP;
Norikazu Fujii, Kitakyushu, JP;
Kazufumi Hanzawa, Kitakyushu, JP;
Masayoshi Tanaka, Tokyo, JP;
Yuji Kubo, Futtsu, JP;
Noriko Yamada, Futtsu, JP;
Nippon Steel Corporation, Tokyo, JP;
Nittetsu Plant Designing Corporation, Fukuoka, JP;
Abstract
A means for treating the end faces of a core which is used for an electrical apparatuses and etc., to give insulation extremely superior in effect of improvement of the insulation, corrosion resistance, adhesiveness, heat resistance, and magnetic properties at a low temperature in a short time without cleaning for removing punching oil, annealing, or other pre-treatment; a core having an insulation coating comprised of a dry film of a pure silicone polymer, modified silicone polymer, and/or mixed silicone polymer as a silicone compound on the core end faces and having an average film thickness of at least 0.5 μm, a breakdown voltage of at least 30V, and a heat resistance in the air of at least 400° C.; and a method of production comprised of forming a core, then dipping it in or spraying it by one or more types of a pure silicone polymer, modified silicone polymer, and/or mixed silicone polymer as an insulation coating.