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AssigneeAustralian Wire Industries Proprietary Limited
InventorsAnthony J. Sander, Jack P. Sciffer, Richard W. Whitton
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A method for controlling the coating of wires, strips or the like, emerging from molten metal baths, involving subjecting the wire to a single stationary, alternating electromagnetic field generated by an electromagnetic device positioned at or below the point of emergence such that the point of emergence is always within the electromagnetic field. The frequency and/or current for generating the field may be adjustable, and the field generated by either parallel or transverse to the wire, strip or the like. The wire, strip or the like may pass through, or adjacent, the electromagnetic device. A neutral or reducing atmosphere may be provided within a chamber situated at the point of emergence and the point of emergence covered with particles inert to the environment. Alternatively the emergence area, may be covered by a confined or unconfined bed of oil charcoal. A similar amount of gas or vapor which will decompose to produce a sulphide (-S) radical may be supplied to the protective atmosphere either directly or in addition to the neutral or reducing gas.
A method of controlling the coating of a wire, strip, mesh or the like, emerging substantially vertically from molten metal baths, comprising subjecting said wire, strip, mesh or the like to an alternating electromagnetic field generated by single phase alternating electric current supplied to an electromagnetic device which is at least partially immersed in the bath, said field being applied at or below the point of emergence of the wire, strip, mesh or the like from the molten metal bath with the point of emergence of said wire, strip, mesh or the like being within the electromagnetic field to thereby control the coating weight per unit of area.
Dependencies are inferred from the claim text.