Coating mass control using magnetic field

Details Coating mass control using magnetic field Coating mass control using magnetic field

1978-11-24

1981-06-16

Pianalto, Bernard D.

Coating processes

Electrical product produced

Integrated circuit, printed circuit, or circuit board

427127, B05D 314

Patent

active

042738008

ABSTRACT:
The invention provides a method for removal of an excess of a liquid metal coating from a substrate, such as a hot dip coated metal substrate, and in preferred embodiments, for control of metal coating thickness.
The method involves moving the substrate through a stationary pulsating or alternating magnetic flux. The flux is directed in a path which enters the coating at an entry zone and exits from the coating at an exit zone, those zones being on the external surface of the coating and spaced apart in the direction of advance of the substrate. The frequency and intensity of the flux are controlled so as to exert on the coating surface a force opposing the viscous drag forces exerted in the coating by the moving substrate. Apparatus for use in performing the method is described.

REFERENCES:
patent: 3518109 (1970-06-01), Halley

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