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:
Feb. 07, 1978
Filed:
Apr. 15, 1976
Applicant:
Inventors:
Gerhard Ziemek, Langenhagen, DT;
Friedrich Schatz, Langenhagen, DT;
Assignee:
Kabel-und Metallwerke, Hannover, DT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23K / ; B23K / ;
U.S. Cl.
CPC ...
72209 ; 72 52 ; 72370 ; 228 19 ; 228125 ;
Abstract
The longitudinal welding seam of a tube is subjected to flexing to obtain strengthening by up and down bending followed by one or multiple stage rolling which in turn is followed by sizing.