Method of forming flat four-sided fastener parts having an openi

Details Method of forming flat four-sided fastener parts having an openi Method of forming flat four-sided fastener parts having an openi

1977-05-23

1978-09-19

Combs, E. M.

10 86B, 29412, 83 42, B21D 5320, B21D 5324

Patent

active

041142187

ABSTRACT:
A method of forming flat four-sided fastener parts from an elongated strip of sheet material by causing the material to progressively pass through a work station where a series of longitudinally spaced openings are formed in the material, and thereafter the material is periodically severed along an irregular line extending from one side to the other of the sheet material for the purpose of separating individual fastener parts from the material.

REFERENCES:
patent: 2371440 (1945-03-01), Hall
patent: 2707012 (1955-04-01), Cox
patent: 4024593 (1977-05-01), Pendell

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