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. 05, 1977
Filed:
Aug. 28, 1975
Applicant:
Inventors:
Horst Biller, Kettwig, DT;
Friedrich Huls, Mulheim, DT;
Assignee:
Mannesmannrohren-Werke AG, Dusseldorf, DT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21B / ;
U.S. Cl.
CPC ...
72205 ; 72234 ; 72367 ;
Abstract
Tubular billets are stretch-rolled in that the rolls of locations closer to the entrance have the speeds reduced temporarily from their respective normal operation speed by an amount, which is made dependent upon the mean longitudinal tension in the billet during rolling.