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. 22, 1980
Filed:
Apr. 03, 1978
Takeo Nakagawa, Noborito, Tama-ku, Kawasaki-shi, Kanagwa-ken, JP;
Kiyoshi Suzuki, Misato, JP;
Hiroyasu Okawa, Mitaka, JP;
Aida Engineering, Ltd., Kanagawa-ken, JP;
Other;
Abstract
A punching die which may be economically produced is disclosed herein. The die is reinforced by superimposing hard thin plates thereon. The punching die is composed of a die body soft enough to be machined and a thin plate, single or plural, which is harder than the die body. The plate has a hole coinciding with a configuration of a product to be punched. The superimposed plate is characterized in that it remains after a product has been punched out from said thin plate by the die body and the punch. The punching die may be easily operated during production. The procedure involves only slight abrasion of the shape. The device is highly durable and precise and operates without causing curvature in the product. Thus, it is suitable for mass production.