Method of making lobular internally and externally threaded inse

Details Method of making lobular internally and externally threaded inse Method of making lobular internally and externally threaded inse

1978-06-07

1979-10-09

Combs, E. M.

10 27R, 10152R, 72104, B21H 304, B23G 700

Patent

active

041700503

ABSTRACT:
The present invention relates to an improved method for economically manufacturing lobular internally and externally threaded self-tapping inserts. The method is characterized by the novel application of a conventional roll forming apparatus of the type including two cylindrical driven thread forming dies in combination with a specially configured lobular elongated stock material, resulting in the provision of a multiplicity of longitudinally spaced-apart, externally threaded increments which may thereafter sequentially be drilled, tapped and severed from the stock material.

REFERENCES:
patent: 2656740 (1953-10-01), Bedker
patent: 3195156 (1965-07-01), Phipard
patent: 3398625 (1968-08-01), Ansingh
patent: 3434168 (1969-03-01), Bonacci

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