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:
Dec. 22, 1981
Filed:
Dec. 10, 1979
Applicant:
Inventors:
Laszlo J Javorik, Oregon, IL (US);
Vernon R Fencl, Northbrook, IL (US);
Assignee:
Grotnes Metalforming Systems, Inc., Chicago, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
B21C / ;
U.S. Cl.
CPC ...
72 75 ; 72 96 ;
Abstract
Metal pipe is planished by passing it longitudinally between two concentric circular arrays of independently rotatable planishing elements which are urged against the inner and outer surfaces of the pipe. The two circular arrays of planishing elements are radially aligned with each other on opposite sides of the pipe wall, and the pipe is rotated relative to the two arrays of planishing elements while the pipe is being passed therebetween.