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:
Sep. 14, 1976
Filed:
May. 20, 1974
Applicant:
Inventors:
John Bernard Lightstone, White Plains, NY (US);
Richard Benedict Mazzarella, Indianapolis, IN (US);
Assignee:
Union Carbide Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B26D / ;
U.S. Cl.
CPC ...
83 15 ; 83170 ;
Abstract
A process for shearing metal which substantially eliminates the effects of plastic deformation in the sheared metal edge. The process comprises (1) cooling the work metal to a cryogenic temperature, and (2) shearing the cooled metal to form a sheared workpiece having edges relatively free of plastic deformation and dimensional distortion. The shearing operations contemplated by the invention include punching, blanking, piercing and slitting.