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:
Nov. 14, 2017
Filed:
Oct. 12, 2016
Applicant:
Nisshin Steel Co., Ltd., Tokyo, JP;
Inventors:
Katsunari Norita, Osaka, JP;
Norimasa Miura, Osaka, JP;
Assignee:
Nisshin Steel Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B21D 24/00 (2006.01); B21D 24/16 (2006.01); B21D 33/00 (2006.01); B21D 22/20 (2006.01); B21D 37/16 (2006.01);
U.S. Cl.
CPC ...
B21D 24/16 (2013.01); B21D 22/208 (2013.01); B21D 33/00 (2013.01); B21D 37/16 (2013.01);
Abstract
An austenitic stainless steel foilwith a thickness equal to or less than 300 μm is disposed to face a punch, and the stainless steel foilis subjected to drawing in a state in which an annular regionof the stainless steel foilthat is in contact with a shoulder portionof the punchis set to a temperature up to 30° C. and an external regionoutside the annular regionis set to a temperature of from 40° C. to 100° C.