Method of making self-locking fasteners with a pressure rolled t

Details Method of making self-locking fasteners with a pressure rolled t Method of making self-locking fasteners with a pressure rolled t

1977-08-29

1979-01-02

Beck, Shrive P.

Coating processes

Solid particles or fibers applied

Uniting particles to form continuous coating with...

10 10P, 151 7, 427195, 427359, 427365, 427369, 427375, B05D 302, F16B 3924

Patent

active

041328159

ABSTRACT:
A self-locking threaded fastener of the type having a resilient thermoplastic resin patch bonded to the thread surface and a method and apparatus for making such fasteners are disclosed. The fastener is heated to a temperature in excess of the plastic melting temperature by induction heating coils and powder is thereupon deposited on the surface of the threads over a predetermined area by gravity feed. Rolling pressure is then applied to the plastic material to form the patch, packing the material between the thread flanks and confining the height of the patch to a controlled radial height above the thread crests. The controlled radial height of the patch is within the normal envelope of the basic major diameter of the fastener thread.

REFERENCES:
patent: 2789926 (1957-04-01), Finholt et al.
patent: 3294139 (1966-12-01), Preziosi
patent: 3310431 (1967-03-01), Loose
patent: 3416492 (1968-12-01), Greenleaf
patent: 3498352 (1970-03-01), Duffy
patent: 3554258 (1971-01-01), Duffy
patent: 3568746 (1971-03-01), Foroni et al.
patent: 3634577 (1972-01-01), Kull
patent: 3720533 (1973-03-01), Gallagher
patent: 3787222 (1974-01-01), Duffy
patent: 3958039 (1976-05-01), Yabuki

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