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:
Oct. 20, 2015
Filed:
Sep. 15, 2010
Yoshiaki Hirota, Tokyo, JP;
Yoshiaki Hirota, Tokyo, JP;
NIPPON STEEL & SUMITOMO METAL CORPORATION, Tokyo, JP;
Abstract
An electric-resistance-welded pipe welding apparatus includes: an impeder that is disposed in the inner portion of a metal strip which is bent into the cylindrical shape, and is disposed spanning over from the upstream to the downstream of a position in which the induction coil is present when viewed along a traveling direction of the metal strip; and a metallic shield plate that is disposed further upstream than an upstream end of the impeder and is disposed in a position which is further downstream than the rolls when viewed along the traveling direction, the metallic shield plate including a hole portion through which the metal strip bent into the cylindrical shape passes, and the metallic shield plate shielding a magnetic flux generated in the induction coil.