Friction lock for threads

Details Friction lock for threads Friction lock for threads

1981-06-08

1983-08-16

Beck, Shrive P.

Coating processes

Solid particles or fibers applied

Uniting particles to form continuous coating with...

427197, 427202, 4273741, 427368, 4273742, 4273744, 118308, 118310, 10 10P, 411258, B05D 302, B05D 112

Patent

active

043991661

ABSTRACT:
Method and apparatus for providing friction producing ring patches on externally threaded fasteners which comprises depositing a fluid wetting agent on a predetermined thread area, supplying thermoplastic resin powder particles to the fluid deposit to form deposits of fluid mixtures, flash heating the mixture deposit to fuse resin particles only at the surfaces to produce a non-tacky skin, accumulating agglomerations of the fasteners and retaining them for an interval sufficient to permit at least substantially complete drying of the fluid mixture deposits to form substantially solid cohesive deposits of discrete resin particles, mass heating the fasteners to fuse the discrete resin particles into continuous fluid deposits and finally cooling the fasteners in separated condition to set the fused resin deposits into solid continuous resin deposits fused to the thread surfaces of the fasteners.

REFERENCES:
patent: 2974059 (1961-03-01), Gemmer
patent: 3293977 (1966-12-01), Dalton et al.
patent: 3579684 (1971-05-01), Duffy
patent: 3795224 (1974-03-01), Batson
patent: 3911160 (1975-10-01), Neuberg
patent: 4147819 (1979-04-01), Hukumoto et al.
patent: 4285378 (1981-08-01), Wallace

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