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. 08, 1977
Filed:
Jul. 25, 1975
Applicant:
Inventors:
Assignee:
Mannesmannrohren-Werke AG, Dusseldorf, DT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21B / ;
U.S. Cl.
CPC ...
72206 ; 72283 ;
Abstract
A novel method and a novel apparatus for continuously forming a very long tube with precise internal and external dimensions from a metal tube blank by reducing the internal diameter of the blank to that of an internal mandrel on which the blank is telescoped, preferable by cold forming the blank onto the mandrel and immediately thereafter, drawing of the tube while it is still on the mandrel to its final external dimension; with no annealing taking place between the two steps.
Wassen, Johann. (1977). Continuous process for the production of very long precision tubes and (U.S. Patent No. 4006622). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4006622
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile