US4579168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Making metal strip and slab from spray
Assignee: BTG International Ltd
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Filing: 1985-03-01
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Granted: 1986-04-01
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Expires: 2005-03-01
Abstract
Abstract In a process for making metal strip 7, a spray 9, 10 of molten metal is directed towards a nip 13 formed by two smooth cooled rolls 6, the rolls being rotated so that the nip hot-compacts the sprayed metal to yield a strip emerging from the exit of the nip. Splats formed by droplets of the molten spray impinging on the rolls 6 before reaching the nip 13 do not stick completely to the roll surfaces but at least partially detach themselves on freezing and form a new surface on which subsequent droplets of the spray land; when the nip is reached, the partially detached frozen droplets and their overlying deposit, on both rolls, are compacted hot.
Inventors
- 👤 Alfred R. E. Singer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:34
CPC Classifications
B; B22; B22D; B22D23/00; B22D11/00; B22D11/06; B22D11/0622
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
80 words
A process for making metal strip and slab, the steps comprising: directing a spray of molten metal towards a nip formed by two smooth cooled rolls, the angle subtended by the outermost parts of the spray being less than half the angle subtended by the axes of the rolls at the origin of the spray; and rotating the rolls so that the nip hot-compacts the sprayed metal to yield a strip or slab emerging from the exit of the nip.
Claim 2
Dependent Claim
80 words
A process for making metal strip and slab, the steps comprising: directing a spray of molten metal towards a nip formed by two smooth cooled rolls, the angle subtended by the outermost parts of the spray being less than half the angle subtended by the axes of the rolls at the origin of the spray; and rotating the rolls so that the nip hot-compacts the sprayed metal to yield a strip or slab emerging from the exit of the nip.
Claim 3
Dependent Claim
39 words
A process according to claim 1, wherein the rolls are so arranged that droplets of the molten spray impinging on the rolls before reaching the nip form splats which at least partially detach themselves from the rolls on freezing.
Claim 4
Dependent Claim
19 words
A process according to claim 1, wherein the centre line of the spray is substantially tangential towards both rolls.
Claim 5
Dependent Claim
53 words
Apparatus for making metal strip and slab, comprising two smooth coolable rolls forming a nip, and means for spraying molten metal towards the nip, the angle subtended by the outermost parts of the spray being less than half the angle subtended by the axes of the rolls at the origin of the spray.
Claim 6
Dependent Claim
53 words
Apparatus for making metal strip and slab, comprising two smooth coolable rolls forming a nip, and means for spraying molten metal towards the nip, the angle subtended by the outermost parts of the spray being less than half the angle subtended by the axes of the rolls at the origin of the spray.
References Cited (Backward Citations)
GB1262471A
Cited
US4114251A
Cited
JPS5573448A
Cited
JPS5732854A
Cited
JPS5788951A
Cited
GB2115014A
Cited
US4420441A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-31 | 1989-09-30 | 1990-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-31 | 1993-09-30 | 1994-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-31 | 1997-09-30 | 1998-04-01 | $7700.00 | Window Closed / Lapsed |