Method of making a double-ended heading punch

Details Method of making a double-ended heading punch Method of making a double-ended heading punch

1978-03-29

1979-04-10

Whitehead, Harold D.

Metal tools and implements, making

Blank or process

72474, 72352, B21K 520

Patent

active

041482336

ABSTRACT:
A punch for forming a fastener head has a shaped projection at each end and is releasably secured in a holder with one end abutting against a ledge on the inside of the holder and the other end extending beyond the holder. The shaped projections are formed simultaneously by a pair of hobs in one press stroke.

REFERENCES:
patent: 1449136 (1923-03-01), Yates
patent: 2638019 (1953-05-01), Stellin
patent: 3124975 (1964-03-01), Lovisek
patent: 3588933 (1971-06-01), Shinopulos et al.

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