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:
Jun. 14, 1994
Filed:
Nov. 17, 1992
Mitsuharu Nonami, Kanagawa, JP;
Yukinori Kawamura, Kanagawa, JP;
Kozo Matsumoto, Kanagawa, JP;
Norikatsu Matsumoto, Kanagawa, JP;
Fumisato Niino, Kanagawa, JP;
Fuji Electric Co., Ltd., Kanagawa, JP;
Abstract
In blanking a metal foil on a press comprising a pair of dies, a pair of punches, and a pair of piezoelectric actuators for driving the punches with are all arranged above and below the metal foil, the punches are vertically vibrated by the piezoelectric actuators, so that, while the punches being held abutted against both surfaces of the metal foil clamped between the dies, a half blanking operation and a reverse blanking operation are carried out alternately, whereby the metal foil is cut along the shearing surface through low cyclic fatigue without formation of burrs.