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:
Jun. 18, 2002
Filed:
Jan. 16, 2001
Applicant:
Inventors:
Christian Frohne, Hannover, DE;
Ernst Hoffmann, Langenhagen, DE;
Wolfram Klebl, Isernhagen, DE;
Dieter Muller, Wedemark, DE;
Assignee:
Nexans, Paris, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B21D 3/903 ; B23K 3/100 ; B23K 3/700 ;
U.S. Cl.
CPC ...
B21D 3/903 ; B23K 3/100 ; B23K 3/700 ;
Abstract
In a process for the continuous production of longitudinally seam-welded and corrugated metal tubes ( ), a metal band drawn off from a supply reel is formed into an open-seam tube, welded at its longitudinal edges, and the welded smooth tube ( ) corrugated. A withdrawal apparatus driven by an electric motor engages the smooth tube. The smooth tube ( ) is corrugated by means of a corrugation plate ( ) located in a corrugation head ( ) which can be driven rotationally. The corrugation head ( ) is driven directly by a hollow shaft motor ( ).