Method of manufacturing an ignition file for a lighter

Details Method of manufacturing an ignition file for a lighter Method of manufacturing an ignition file for a lighter

1986-09-23

1987-10-27

Crane, Daniel C.

Metal deforming

With cutting

Severing a discrete piece from stock, work, or product

72324, 72356, 72359, B21K 500

Patent

active

047021527

ABSTRACT:
This invention relates to a method of manufacturing an ignition file for a lighter by a press and a device therefor, more particularly to an improvement of a punching operation of an axial hole for mounting an ignition file. A material pressed into a disk-like configuration is prepared and a concave portion is provided in the approximate center of both sides of the file member. A hole is punched between concave portion having a diameter smaller than that of the concave portion. The fin of the file member caused by punching is absorbed in a gap provided inside the die wall while the fin projecting toward the die hole to be punched is absorbed in said concave portion.

REFERENCES:
patent: 1384118 (1921-07-01), Blakeslee
patent: 2080850 (1937-05-01), Frayer
patent: 2342021 (1944-02-01), Swanson
patent: 2393850 (1946-01-01), Wilcox
patent: 2689360 (1954-09-01), Ware
patent: 3169257 (1965-02-01), Loos et al.
patent: 3347080 (1967-10-01), Bailey et al.
patent: 3793658 (1974-02-01), Ladouceur
patent: 4290292 (1981-09-01), Yoneda

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