Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Including settable material – Adhesive encapsulated
Patent
1980-08-28
1982-12-14
Bell, Mark
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Including settable material
Adhesive encapsulated
411176, 428582, 428592, F16B 3712, F16B 3702
Patent
active
043635814
ABSTRACT:
A thin sheet of metal is drawn in progressive steps to form a hollow body having a closed end tubular portion integrally connected to an outwardly projecting cup-shaped flange portion. A section of the tubular portion is crimped inwardly against a threaded mandrel to form helical threads and diametrically opposed and outwardly projecting double wall rib portions. The mandrel is unthreaded to form a sheet metal insert which is adapted to be supported within a mold cavity by a cylindrical support pin during injection of a plastics material into the cavity and around the insert. The threads and rib portions positively secure the sheet metal insert within the molded plastics article or part for receiving a threaded fastener. The insert may also be used in a metal part or casting or in a wood article, wherever threads are required or desirable.
REFERENCES:
patent: 1919455 (1933-07-01), Wilson
patent: 2678074 (1954-05-01), Adams
patent: 3403718 (1968-10-01), Hughes
patent: 3451181 (1969-06-01), Neuschotz
patent: 3454072 (1969-07-01), Dietlein
patent: 3480061 (1969-11-01), Leistner
patent: 3835615 (1974-09-01), King, Jr.
patent: 3962843 (1976-06-01), King, Jr.
patent: 4097168 (1978-06-01), Pagel
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