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. 06, 1981
Filed:
Mar. 16, 1979
Applicant:
Inventors:
Walter von Dorp, Monchen-Gladbach, DE;
Heinrich Steinbrecher, Meerbusch, DE;
Assignee:
Wean United, Inc., Pittsburgh, PA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B21B / ;
U.S. Cl.
CPC ...
72 96 ; 72370 ;
Abstract
A method and apparatus for producing a thin metallic tube having a trailing end portion which optionally can be formed with an external diameter substantially corresponding to or varying from that of the remaining rolled portion of the tube rolled in a three roller skewed rolling mill. This is accomplished by causing an angular unisonal displacement of the roller axes to effect an enlargement of the rolling area, and at least during part of the roller movement, a second movement of the roller perpendicular to the axis of the tube.