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:
May. 09, 1995
Filed:
Apr. 16, 1993
Karl H Hausler, Korschenbroich, DE;
Mannesmann Aktiengesellschaft, Dusseldorf, DE;
Abstract
A method of producing seamless pipes by carrying out a plug rolling procedure includes expanding and stretching a hollow ingot into a bloom by carrying out at least two consecutive passes in a roll stand having a box-groove and by using a stationary plug supported by a rod. The bloom is pulled after each pass from the rod in a direction opposite the rolling direction. The bloom is turned after each pass by 90.degree. C. about a longitudinal axis thereof and the plug is exchanged after each pass. The method further includes the step of adjusting in one of the passes a wall thickness of the bloom in a wall portion of the bloom at the groove bottom by changing the roll distance in order to thin-stretching the wall portion such that the wall thickness of the finish-rolled bloom is uniform over the circumference thereof.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile