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. 27, 2015
Filed:
Aug. 26, 2010
Carsten Holste, Goslar, DE;
Franz Martin Knoop, Vlenenburg, DE;
Carsten Holste, Goslar, DE;
Franz Martin Knoop, Vlenenburg, DE;
Salzgitter Mannesmann Grossrohr GmbH, Salzgitter, DE;
Abstract
In a method for producing welded helical seam tubes having optimized tube geometry a metal strip is helically formed into an open seam tube by means of a forming unit and the converging strip edges are welded together, wherein an actual diameter determined on the welded tube is compared with a specific target diameter and a possible deviation lying outside a tolerance threshold is used to correct the actual tube diameter, wherein the strip edges are completely welded in a two stage step, including tack welding as a first step immediately after the shaping to form an open seam tube and thereafter final welding as a second step. The tube diameter is measured after the complete shaping to form an open seam tube and before the final welding. For this purpose, the diameter measuring device is arranged in such a way that either the completely shaped open seam tube or the only tack-welded tube is measured.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile