Cutting – With product handling means – Means to move – guide – or permit free fall or flight of product
Patent
1993-09-13
1995-09-26
Rada, Rinaldi I.
Cutting
With product handling means
Means to move, guide, or permit free fall or flight of product
83618, 83687, 83691, 83697, B21D 2810
Patent
active
054526353
ABSTRACT:
A punch for removing material from lead frames has a substantially rectangular body with an array of grooves along one side and a step removed on one end from the side opposite the grooves to provide an array of punch teeth extending from the body of the punch. The grooves provide a means of reworking the punch to provide a new array of teeth, by machining away all or part of the teeth and then extending the step in the direction of the groove to provide substantially the original length for the individual teeth. By providing a punch with groove length several times the tooth length, the punch can be reworked several times before being discarded.
REFERENCES:
patent: 3535964 (1970-10-01), Ahlman
patent: 3785236 (1974-01-01), Peterson
patent: 4399610 (1983-08-01), Moyer
patent: 4510786 (1985-04-01), Strangward
patent: 4742746 (1988-05-01), Olsson
patent: 5163350 (1992-11-01), Groswith, III et al.
Boys Donald R.
Integrated Packaging Assembly Corporation
Rada Rinaldi I.
Schrock Allan M.
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