Fastener manufacturing apparatus

Details Fastener manufacturing apparatus Fastener manufacturing apparatus

1974-06-17

1976-07-13

Lanham, C. W.

Electric heating

Microwave heating

Tunnel furnace

10 9, 10 10P, 219 76, 219 77, 219 87, 118624, B21H 300, B23G 900, B23K 904

Patent

active

039685330

ABSTRACT:
A threaded fastener of the self-tapping type is described having the conventional head, shank, and pilot end. The shank includes a helically wound thread member impregnated with a carbide or other, harder substance than the metal from which the fastener is made. A thread-cutting fastener, having its pilot tip end impregnated is also described. A thread-rolling machine with a unique impregnating electrode is disclosed. The electrode is shown to engage the fastener selectively during the thread-rolling operation itself.

REFERENCES:
patent: 1327101 (1920-01-01), Kellogg
patent: 3033705 (1962-05-01), Hanink et al.
patent: 3098150 (1963-07-01), Inoue
patent: 3129504 (1964-04-01), Ivan et al.
patent: 3415970 (1968-12-01), Cline
patent: 3416492 (1968-12-01), Greenleaf
patent: 3452714 (1969-07-01), Burke et al.
patent: 3524956 (1970-08-01), Rocklin
patent: 3552467 (1971-01-01), Bergere
patent: 3614373 (1971-10-01), Skilling
patent: 3619545 (1971-11-01), Borden
patent: 3643722 (1972-02-01), Oestereicher
patent: 3743815 (1973-07-01), Woods
patent: 3763343 (1973-10-01), Rocklin
patent: 3831213 (1974-08-01), Bedi

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