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. 30, 1981
Filed:
May. 07, 1979
Applicant:
Inventors:
Assignee:
Wean United, Inc., Pittsburgh, PA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B21B / ; B21B / ;
U.S. Cl.
CPC ...
72 14 ; 72208 ; 72234 ;
Abstract
A method and apparatus in a hot multi-stand tube mill for producing a thin metallic tube having end portions which corresponds to the wall thickness and diameter of the rest of the rolled tube or alternately, tapered ends. Each stand is provided with a set of three cooperating rolls arranged to form a roll pass opening. According to the tube's positioning in the mill, an appropriate additional adjustment of the rolls to decrease or enlarge the roll pass diameter is made in one or all of the last three stands. Both an initial roll setting varying means and an additional roll setting varying means cause movement of wedges abutting the roll chocks thereby causing movement of the rolls.