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. 03, 1980
Filed:
Jul. 03, 1978
Applicant:
Inventors:
Herbert Bothner, Warwick, NY (US);
John M Frusco, Scotch Plains, NJ (US);
Dieter Spieth, New City, NY (US);
Assignee:
Plessey, Inc., New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21D / ;
U.S. Cl.
CPC ...
72404 ; 72335 ; 1131 / ;
Abstract
Tools for stamping very delicate lead frames for semiconductor packages, including scored and bent-up tabs that retain groups of inner lead tips in position through subsequent operations, after which they are broken off. Sequential punch and die sets are used to (1) define the tabs, (2) bend down the leads, (3) score the tabs and coin the lead tips, and (4) bend the tabs up. At stations (3) and (4) means are provided to lift scored tabs out of the die and to allow the frame strip to move over the tab-bending die without interference.