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:
Aug. 24, 1999
Filed:
Oct. 11, 1996
Ryouichi Ikeda, Osaka, JP;
Minoru Komura, Osaka, JP;
Yoshihiro Okano, Tokyo, JP;
Norio Shoji, Tokyo, JP;
Toshiyuki Namioka, Kanagawa, JP;
Akio Kida, Tokyo, JP;
Kiyotaka Hirahara, Hyogo, JP;
Nitto Denko Corporation, Osaka, JP;
Nippon Kokan Co., Ltd., Tokyo, JP;
Nippon Kokan Koji Kabushiki Kaisha Kanagawa, Kanagawa, JP;
Abstract
A method for applying a corrosion-protective coating, with a heat-shrinkable tube, to a joint between welded end portions of corrosion-protectively coated steel pipes, has a configuration comprising the steps of: preparing a coating implement having a releasant layer formed on the outer circumferential portion of the heat-shrinkable tube, and a heating layer formed on the outer circumferential portion of the releasant layer; positioning the coating implement so as to cover the welded portion of the joint and its adjacent portions; thermally shrinking the coating implement in a state in which the gap between the coating implement and the aforementioned portions is kept in a vacuum; and removing the releasant layer and the heating layer, whereby the aforementioned portions are corrosion-protectively coated by the heat shrinkage of the tube.