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. 07, 1999
Filed:
May. 01, 1997
Applicant:
Inventors:
Paul Edward Krajewski, Sterling Heights, MI (US);
Edward Frank Ryntz, Warren, MI (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C22C / ;
U.S. Cl.
CPC ...
148698 ; 148691 ; 148694 ; 148688 ; 148695 ; 148417 ; 148415 ; 148416 ;
Abstract
An improved method of forming a severe bend or a hem in a sheet of wrought aluminum age-hardened and age-hardenable alloy includes heating the region to be bent or hemmed to a temperature above about 250.degree. C. for a period of seconds and then quenching the heated region to remove the age-hardening effect and thereafter accomplishing the bend or hem before age hardening of the heated region occurs.