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:
Apr. 09, 2013
Filed:
May. 24, 2012
Applicant:
Ken Matsui, Tokyo, JP;
Inventor:
Ken Matsui, Tokyo, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21D 5/01 (2006.01);
U.S. Cl.
CPC ...
Abstract
A bending apparatus for bending a metal member includes at least one die, a punch disposed on an opposite side of the die through the metal member for pressurizing the metal member by relatively moving with respect to the die to perform bending, and a knock out die for supporting the metal member when the bending is performed. Friction generated on a surface of the knock out die for receiving the metal member becomes smaller continuously or gradually from a center portion toward side portions thereof in a bending ridge line direction.