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:
Jan. 10, 1989
Filed:
Jun. 09, 1987
Toshio Tsuta, Harima, JP;
Koji Kadota, Kobe, JP;
Shigetomo Matsui, Osaka, JP;
Hiroyuki Matsumura, Kobe, JP;
Hisao Hasegawa, Kobe, JP;
Hiromichi Nakamura, Kobe, JP;
Tetsuro Noma, Kobe, JP;
Hisahiko Miyazaki, Osaka, JP;
Munekatsu Furugen, Nishinomiya, JP;
Kawasaki Jukogyo Kabushiki Kaisha, Hyogo, JP;
Sumitomo Metal Industries Ltd., Osaka, JP;
Abstract
An apparatus for continuous production of seam-welded steel tubing is proposed. The apparatus includes a series of shaping rolls for shaping a strip taken out from a strip coil into a tubular intermediate product, the roll series including a finpass roll group. The tubular product is subjected to seam welding under the action of a seam welder. Before arrival at the welder, a substantial main part of the preformed tubing with exception of opposing edge zones thereof is subjected to heating by a heater compensate for excess compressive stresses induced in the edge zones, while these zones are subjected to cooling by a cooler for avoiding otherwise formation of disadvantageous edge wavings which would otherwise occur.