B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
327/78
B23K 11/36 (2006.01) B23K 13/02 (2006.01)
Patent
CA 1174294
ABSTRACT OF THE DISCLOSURE: 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 metals 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 metals 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.
391103
Ichihara Hirohisa
Kumai Ko
Nougata Hiroshi
Satoh Takashi
Takechi Hiroshi
Nippon Kinzoku Co. Ltd.
Nippon Steel Corporation
Robic Robic & Associes/associates
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