Patent US4228200A successfully refreshed from Google Patents.
US4228200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlling metal coatings on wire, strip and the like emerging from metal baths
Assignee: Australian Wire Industries Pty Ltd
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Filing: 1978-11-22
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Granted: 1980-10-14
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Expires: 1998-11-22
Abstract
Abstract 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.
Inventors
- 👤 Anthony J. Sander
- 👤 Jack P. Sciffer
- 👤 Richard W. Whitton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:20
CPC Classifications
C; C23; C23C; C23C2/00; C23C2/14; C23C2/16; C23C2/18; C23C2/185; C23C2/24; Y; Y10; Y10S; Y10S118/00; Y10S118/19
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
108 words
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.
Claim 2
Independent Claim
108 words
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.
Claim 3
Dependent Claim
22 words
A method as claimed in claim 1, in which the frequency of the alternating electromagnetic field is not less than 20 Hz.
Claim 4
Dependent Claim
23 words
A method as claimed in claim 1, in which the coating weight is adjusted by controlling the frequency of the alternating electromagnetic field.
Claim 5
Dependent Claim
25 words
A method as claimed in claim 1, in which the coating weight is adjusted by controlling the current used to generate the alternating electromagnetic field.
Claim 6
Dependent Claim
26 words
A method as claimed in claim 1, in which the generated alternating electromagnetic field is essentially parallel to the moving wire, strip, mesh or the like.
Claim 7
Dependent Claim
26 words
A method as claimed in claim 1, in which the generated alternating electromagnetic field is essentially transverse to the moving wire, strip, mesh or the like.
Claim 8
Dependent Claim
26 words
A method as claimed in claim 1, in which the wire, strip, mesh or the like being coated passes through means for generating said electromagnetic field.
Claim 9
Dependent Claim
43 words
A method as claimed in claim 1, in which the wire, strip, mesh or the like being coated passes outside but in close proximity to the device for generating said electromagnetic field such that the wire passes through regions of high flux density.
Claim 10
Dependent Claim
76 words
A method as claimed in claim 1, in which the coated wire, strip, mesh or the like is protected by a neutral or reducing atmosphere supplied to a chamber open at both top and bottom which has its bottom edge immersed in the molten metal bath, and which incorporates the device for generating said electromagnetic field and surrounds the area where the wire, strip, mesh or the like being coated emerges from the molten metal bath.
Claim 11
Dependent Claim
20 words
A method as claimed in claim 9, in which the emergence area is covered with particles inert to the environment.
Claim 12
Dependent Claim
50 words
A method as claimed in claim 1, in which the emergence area is covered with a bed of oiled charcoal or similar material enclosed in a chamber open at both top and bottom which has its bottom edge immersed in the molten metal bath, and which incorporates said electromagnetic device.
Claim 13
Dependent Claim
46 words
A method as claimed in claim 9, in which a small amount of gas or vapour, which contains or which will decompose to produce a sulphide (-S) radical, is supplied to the protective atmosphere either directly or as an addition to the neutral or reducing gas.
Claim 14
Dependent Claim
38 words
A method as claimed in claim 9, in which a gas or vapour which contains or will decompose to produce a sulphide (-S) radical is supplied within the chamber after the molten coating has achieved its final thickness.
References Cited (Backward Citations)
US3518109A
Cited
DE2423598A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-10-14 | 1984-04-14 | 1984-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-14 | 1988-04-14 | 1988-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-14 | 1992-04-14 | 1992-10-14 | $7700.00 | Window Closed / Lapsed |