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:
Jul. 20, 1999
Filed:
Feb. 06, 1997
Applicant:
Inventors:
Wolfgang Streubel, Detmold, DE;
Udo Klasfauseweh, Gutersloh, DE;
Assignee:
Benteler AG, Paderborn, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B21D / ; B21D / ;
U.S. Cl.
CPC ...
72 51 ; 723671 ; 72368 ;
Abstract
A method of manufacturing pipes having sections with different wall thicknesses from an initially plane sheet metal in which a starting sheet metal is subjected to a rolling deformation so as to intentionally produce areas of different wall thicknesses in rolling direction. Subsequently, the rolled sheet metal is cut to size as required. The intermediate product obtained in this manner is then shaped into a pipe and the abutting edges are then joined together.