Method of manufacturing metal fasteners

Details Method of manufacturing metal fasteners Method of manufacturing metal fasteners

1986-06-23

1987-08-25

Crane, Daniel C.

Metal deforming

With cutting

Severing a discrete piece from stock, work, or product

72335, 72329, 72324, 29 13, 402 14, B21D 2808

Patent

active

046884157

ABSTRACT:
A metal fastener for a report folder and the method of manufacturing same comprising the steps of forming the fastener head, forming a single prong portion extending from the periphery of the head, and lancing the prong portion to form two separate prongs.

REFERENCES:
patent: 171712 (1876-01-01), Adair
patent: 185457 (1876-12-01), Shinn
patent: 210885 (1878-12-01), Van Benschoten
patent: 661239 (1900-11-01), Ellis
patent: 1328472 (1920-01-01), Affelder
patent: 1513049 (1924-10-01), Krehbiel
patent: 2268080 (1941-12-01), Novick
"Progressive Die Slashes Tooling" from American Machinist, Apr. 8, 1948, pp. 86 and 87.

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