US3727672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Formation of steel strip
Assignee: Steel Company of Wales Ltd
•
Filing: 1970-12-04
•
Granted: 1973-04-17
•
Expires: 1990-12-04
Abstract
Abstract The present invention relates to a process for the continuous casting of metal strip, which process comprises imparting an electrostatic charge of at least 80,000 volts to a stream of molten metal, passing the stream of metal through a nozzle into an inert atmosphere and allowing the stream leaving the nozzle to atomise to a fine spray, collecting the spray droplets on a cool receiving surface to form a layer of metal on said surface and continuously stripping the layer of metal from said surface.
Inventors
- 👤 H Grenfell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:18
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/06; B22D11/0611
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
118 words
Apparatus adapted for continuous casting of metal strip comprising a tundish having a vertically disposed tapping means terminating at its lower end in downwardly extending nozzle means, flow control means positioned adjacent the nozzle means and operable to control the flow of molten metal through said nozzle to the collecting chamber into which said nozzle debouches, rotatable collecting means provided below said nozzle in a surface of the chamber, and electrode means in electrically conductive relationship to the molten metal in the tundish whereby the molten metal is charged and passes from said tundish via said tapping means and nozzle, leaves the end of the nozzle in a downwardly directed spray and is collected on said collecting means.
Claim 2
Dependent Claim
118 words
Apparatus adapted for continuous casting of metal strip comprising a tundish having a vertically disposed tapping means terminating at its lower end in downwardly extending nozzle means, flow control means positioned adjacent the nozzle means and operable to control the flow of molten metal through said nozzle to the collecting chamber into which said nozzle debouches, rotatable collecting means provided below said nozzle in a surface of the chamber, and electrode means in electrically conductive relationship to the molten metal in the tundish whereby the molten metal is charged and passes from said tundish via said tapping means and nozzle, leaves the end of the nozzle in a downwardly directed spray and is collected on said collecting means.
Claim 3
Dependent Claim
53 words
Apparatus as claimed in claim 1 wherein the collecting means is a rotatable water cooled Roll disposed within the bottom wall of the collecting chamber, glands being provided to permit rotation of the roll about its axis with respect to the chamber wall and without substantial loss of gas from the collecting chamber.
Claim 4
Dependent Claim
57 words
Apparatus as claimed in claim 1 wherein the tundish and collecting chamber are substantially insulated from their surroundings and wherein motor means are provided for rotation of the roll about its axis so that material collecting on said roll surface passes through said glands and out of the collecting chamber for subsequent stripping from the rolled surface.
Claim 5
Dependent Claim
42 words
Apparatus as claimed in claim 3 wherein the sealing glands between the roller and the walls of the collecting chamber comprise elongate conduits disposed adjacent the roller surface along which nitrogen or a mixture of nitrogen and argon is blown under pressure.
References Cited (Backward Citations)
US305716A
Cited
US510808A
Cited
US521791A
Cited
US2491889A
Cited
US2639490A
Cited
US2864137A
Cited
US3344843A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |