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:
May. 11, 1999
Filed:
Jul. 17, 1996
Applicant:
Inventors:
Akihito Sato, Toyota, JP;
Shinichiro Nakamura, Nagoya, JP;
Takashi Hosoe, Toyota, JP;
Atsunobu Murata, Gifu-ken, JP;
Assignees:
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Kabushiki Kaisha Toyota Chuokenkyusho, Aichi-gun, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B21D / ;
U.S. Cl.
CPC ...
72350 ; 723792 ;
Abstract
A sheet forming method including the steps of: holding a blank between a blank holder and an opposing die so that wrinkling is prevented in the blank; and forming the blank to an objective shape with a punch, while imposing a force of a variable bead on the blank at a selected position in a point manner and only during a part of the entire forming period selectively. An apparatus for conducting the above method.