Method for making search coil assembly for metal detectors

Details Method for making search coil assembly for metal detectors Method for making search coil assembly for metal detectors

1989-05-30

1990-02-27

Echols, P. W.

Metal working

Method of mechanical manufacture

Electrical device making

336 84C, 336 96, H01F 706

Patent

active

049033956

ABSTRACT:
A method for making a coil assembly for a metal detector of the type used for detecting metal fragments in foodstuffs and pharmaceuticals, the method comprising providing a frame of non-metallic material, the frame having an aperture therethrough for the passage of material undergoing inspection, winding coils of electrically conductive strands on the frame, applying a first plastic coating in liquid form to the frame and coils, less the aperture portion of the frame, applying metal in fluid form to the first plastic coating to encase the first plastic coating in a metal layer, and applying a second plastic coating in liquid form to the metal layer to encase the metal layer in a second plastic coating.

REFERENCES:
patent: 2237254 (1941-04-01), Broekhuysen
patent: 2628342 (1953-02-01), Taylor
patent: 2705292 (1955-03-01), Wagenseil
patent: 3213173 (1965-10-01), Cobb
patent: 3278455 (1966-10-01), Feather
patent: 3361962 (1968-01-01), Albrecht
patent: 3368175 (1968-02-01), Giegerich et al.
patent: 4683454 (1987-07-01), Vollmer et al.

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