Apparatus for producing locking patches on magnetic screws

Details Apparatus for producing locking patches on magnetic screws Apparatus for producing locking patches on magnetic screws

1975-12-30

1978-04-04

Rimrodt, Louis K.

Coating apparatus

Projection or spray type

Rotating turret work support

118620, 335285, B05C 500

Patent

active

040820580

ABSTRACT:
Disclosed herein is improved apparatus for mass producing locking patches of thermoplastic material on threaded portions of magnetic elements, such as screws. The apparatus includes a rotating dial assembly comprising a plurality of similar, closely-spaced permanent magnets, thermally isolated from one another. The screws to be patched are delivered to the periphery of the dial assembly where they are magnetically held by the magnets and carried past a heating station and a station where a stream of powder of the thermoplastic material is directed against preselected portions of the threads of the heated screws and fused in place to form the desired patches bonded to the unmodified threads of the screws.

REFERENCES:
patent: 3304527 (1967-02-01), Marrs et al.
patent: 3452714 (1969-07-01), Burke et al.
patent: 3530827 (1970-09-01), Burke

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