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.

Date of Patent:
Aug. 03, 2010

Filed:

Apr. 10, 2007
Applicants:

Yuichi Nagai, Tochigi, JP;

Hideo Meguri, Tochigi, JP;

Kenzo Takeda, Tochigi, JP;

Takayuki Egawa, Tochigi, JP;

Inventors:

Yuichi Nagai, Tochigi, JP;

Hideo Meguri, Tochigi, JP;

Kenzo Takeda, Tochigi, JP;

Takayuki Egawa, Tochigi, JP;

Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B21D 22/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

In a press working apparatus, while a servo motoris acting, an upper dieis made to come close to a lower dieand press working of the first time is conducted on a steel plate. A slideris raised to a movable punch preparation position. A movable punchis protruded from a die faceof the upper dieby width H and locked by a mechanical lock. The upper dieis made to come close to the lower dieagain and the steel plateis pushed with the upper dieand at the same time an additional worked portionis pushed and deformed with the movable punchso as to conduct press working of the second time. After the movable punchhas been retracted, the slideris raised.


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