Coating processes – Solid particles or fibers applied – Uniting particles to form continuous coating with...
Patent
1989-02-21
1990-01-02
Combs, E. Michael
Coating processes
Solid particles or fibers applied
Uniting particles to form continuous coating with...
10 10P, 118308, 118DIG16, 427240, B05C 1900, B05D 300
Patent
active
048912441
ABSTRACT:
A method of making locking threaded fasteners having on the threaded surfaces thereof locking patch material formed by the accumulation of fused thermoplastic resin particles. The fasteners are advanced through a heating zone followed by an application zone. The fasteners are heated while in the heating zone to a temperature sufficient to fuse thermoplastic resin particles received on the threaded surfaces in the application zone. Thermoplastic resin particles are applied to the fasteners in the application zone by a mechanical propelling device which comprises a rotatable slinger that propels the particles by centrifugal force against the heated threaded surfaces. The thermoplastic resin particles build up on the threaded surfaces and fuse into locking patches. Apparatus for carrying out the method is also disclosed.
REFERENCES:
patent: 3428044 (1969-02-01), Whitehead et al.
patent: 3579684 (1971-05-01), Duffy
patent: 4132815 (1979-01-01), Cadwallader
patent: 4285378 (1981-08-01), Wallace
patent: 4508759 (1985-04-01), Wallace
patent: 4545712 (1985-10-01), Wallace
patent: 4800102 (1989-01-01), Takada
Combs E. Michael
The Oakland Corporation
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