Coating apparatus – With means to apply electrical and/or radiant energy to work... – Electrostatic and/or electromagnetic attraction or...
Patent
1991-03-05
1993-01-05
Jones, W. Gary
Coating apparatus
With means to apply electrical and/or radiant energy to work...
Electrostatic and/or electromagnetic attraction or...
118641, 118 37, 118 40, 118 72, 118 69, B05B 5025
Patent
active
051767554
ABSTRACT:
Process and apparatus for forming a plastic coating on a metal strip. A metal strip is cleaned, surface treated, coated with an electrostatically charged plastic powder in an enclosed chamber using a plurality of spray guns positioned on both sides of the strip, inductively heated to above the melting point of the powder, and maintained in an infrared heater until the fused powder is flowed into a coating having a smooth surface and a uniform thickness. Thermoplastic and thermosetting coatings, having thicknesses of at least 10 microns formed using total induction and infrared heating times of less than 60 seconds, can be fabricated without cracking.
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Center for Metals Fabrication, "Short Wave Infrared Curing", 1987, vol. 1, No. 1.
Cockerham Lloyd E.
Myers Frederick A.
Winkle, Sr. Sherman E.
Armco Inc.
Bunyard R. J.
Fillnow L. A.
Johnson R. H.
Jones W. Gary
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