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:
Jun. 24, 1986
Filed:
Apr. 04, 1985
Hiroshi Takechi, Kimitsushi, JP;
Mitsuo Yoshizawa, Kimitsushi, JP;
Hiroshi Nougata, Kimitsushi, JP;
Hirohisa Ichihara, Kimitsushi, JP;
Nippon Steel Corporation, Tokyo, JP;
Abstract
An impeder for use in an apparatus for resistance tube welding by which a strip-shaped skelp continuously formed into a tubular or spirally tubular shape having spaced opposed edge portions defining a gap therebetween has the edge portions heated and pressed together for being welded. The impeder has a generally tubular casing and a core within the casing consisting of a plurality of laminated bodies each consisting of a plurality of substantially flat planar foils of metallic magnetic material, the core, when viewed in cross-section traverse to the central longitudinal axis of the casing, having the transverse cross-sections of the laminated bodies on parts of at least one circle concentric with the longitudinal axis of the casing and having the planes of the foils extending substantially radially outwardly from the longitudinal axis.