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:
Jan. 15, 1991
Filed:
Nov. 14, 1989
Applicant:
Inventors:
Assignee:
Brother Kogyo Kabushiki Kaisha, Aichi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21J / ;
U.S. Cl.
CPC ...
72 67 ; 72406 ;
Abstract
A plastic working method and apparatus which performs swiveling motion of an upper die mounted on a die holder. A toggle mechanism is provided for power assisting function. The toggle mechanism includes a link and the die holder. Upper and lower end portion of the die holder are movably supported by upper and lower double eccentric rotary mechanisms for changing orientation of the die holder. The link is disposed within the die holder and has upper end supported by a machine frame and a lower end supported by the die holder. Orientation of the link is also changeable.