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1. (WO1993016821) PROCEDE ET APPAREIL SERVANT A APPLIQUER ET A ENLEVER UN LIQUIDE REFRIGERANT AFIN DE REGULER LA TEMPERATURE D'UNE BANDE METALLIQUE A DEPLACEMENT CONTINU
Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

CLAIMS
1. A metal processing procedure wherein metal strip is advanced continuously longitudinally along a generally horizontal path with opposed major surfaces of the strip respectively facing upwardly and downwardly,
characterized by a process for cooling the strip, comprising the steps of:
(a) delivering coolant liquid into contact with only the downwardly facing surface of the advancing strip by discharging the coolant liquid upwardly, onto the
downwardly facing strip surface, through a plurality of upwardly opening slots disposed below the strip in spaced relation thereto, the slots being spaced apart along the path and each extending, transversely of the path, across substantially the entire width of the strip while (b) preventing the discharged coolant liquid from coming into contact with the upwardly facing surface of the strip, and, (c) downstream of the plurality of slots in the direction of strip advance, removing coolant liquid from the downwardly facing strip surface.
2. A process according to claim 1, characterized in that the coolant liquid is water.
3. A process according to claim 1, characterized in that all the slots are oriented to direct the coolant liquid toward the strip at an angle of at least 90° to the direction of advance of the strip in the path.
4. A process according to claim 3, characterized in that most of the slots are oriented to direct the coolant liquid toward the strip at an angle greater than 90° to the direction of advance of the strip in the path.
5. A process according to claim 4, characterized in that one or more of the slots which are furthest upstream with respect to the strip path is oriented to direct the coolant liquid toward the strip at an angle of about 90° to the direction of strip advance, for limiting the upstream extent of coolant delivery.

6. A process according to claim 4, characterized in that the coolant liquid is supplied to the slots at a pressure such that it impinges on the strip from each slot as a continuous curtain of water across substantially the full- width of the strip without substantially upwardly deflecting the strip.
7. A process according to claim 4, characterized in that the slots are each between 0.2 and 5.0 mm wide.
8. A process according to claim 4 , characterized in that the spacing between adjacent slots, in the direction of strip advance, is between about 50 and about 500 mm.
9. A process according to claim 1, characterized in that the removing step comprises directing a fluid knife against the downwardly facing strip surface, at an angle greater than 90° to the direction of strip advance, downstream of the plurality of slots.
10. A process according to claim 9, characterized in that said fluid knife is a liquid knife.
11. A process according to claim 10, characterized in that said liquid knife is a knife of the same liquid as said coolant liquid.
12. A process according to claim 10, characterized in that said liquid knife is a knife of a liquid different from and immiscible with said coolant liquid.
13. A process according to claim 12, characterized in that the coolant liquid is water and the knife liquid is oil.
14. A process according to claim 11, characterized in that the removing step further includes directing a second liquid knife against the downwardly facing strip surface downstream of the first-mentioned liquid knife, and wherein the second liquid knife is a knife of a liquid different from and immiscible with said coolant liquid.
15. A process according to claim 14, characterized in that the coolant liquid is water and the second-knife liquid is oil.

16. A process according to claim 19, characterized in that the removing step further includes training the strip around a hold-down roll in contact with the upwardly facing strip surface at a location such that the liquid knife impinges against the downwardly facing strip surface at a point at which the upwardly facing strip surface engages said hold-down roll.
17. A process according to claim 1, characterized in that said procedure is a multistand cold rolling procedure in which the metal strip is advanced continuously
longitudinally through at least two roll stands in
succession for progressively reducing the thickness of the strip, the roll stands being spaced apart in tandem along the generally horizontal path, and wherein the cooling, preventing, and removing steps are performed at a cooling locality disposed between said two roll stands in said path.
18. A metal processing procedure wherein metal strip is advanced continuously longitudinally along a generally horizontal path with opposed major surfaces of the strip respectively facing upwardly and downwardly, while coolant liquid is applied to the downwardly facing surface of the strip at a cooling locality,
characterized by a process for removing coolant liquid from the downwardly facing strip surface downstream of the cooling locality, comprising (a) directing a liquid knife against the downwardly facing strip surface, at an angle greater than 90° to the direction of strip advance, downstream of the cooling locality, while (b) training the strip around a hold-down roll in contact with the upwardly facing strip surface at a location such that the fluid knife impinges against the downwardly facing strip surface at a point at which the upwardly facing strip surface engages said hold-down roll.
19. A process according to claim 18, characterized in that the liquid knife is a knife of a liquid different from and immiscible with said coolant liquid.

20. A process according to claim 18, further
characterized by the step of directing a second liquid knife against the downwardly facing strip surface at a point, downstream of the first-mentioned liquid knife in the direction of strip advance, at which the upwardly facing strip surface engages said hold-down roll, the first-mentioned liquid knife being a knife of the same liquid as said coolant liquid, and the second liquid knife being a knife of a liquid different from and immiscible with said coolant liquid.
21. A metal-strip-treating system, comprising means for advancing metal strip continuously longitudinally along a defined generally horizontal path with^opposed major surfaces of the strip respectively facing upwardly and downwardly,
characterized by an apparatus for cooling the strip, said apparatus comprising: (a) means for delivering coolant liquid into contact with only the downwardly facing surface of the advancing strip by discharging the coolant liquid upwardly, onto the downwardly facing surface of the strip, through a plurality of upwardly opening slots disposed below the strip in spaced relation thereto, the slots being spaced apart along the path and each extending, traversely of the path, across
substantially the entire width of the strip; (b) means for supplying the coolant liquid to the slots; (c) means for preventing the discharged coolant liquid from coming into contact with the upwardly facing surface of the strip; and (d) means for removing coolant liquid from the downwardly facing strip surface downstream of the plurality of slots.

22. Apparatus as defined in claim 21, characterized in that most of the slots are oriented to direct the coolant liquid toward the strip at an angle greater than 90° to the direction of advance of the strip in the path. 23. Apparatus as defined in claim 22, characterized in that said delivering means comprises a plurality of manifolds each having one of said slots, and wherein said supplying means comprises a common constant head standpipe from which the coolant liquid flows to all said manifolds.

24. Apparatus as defined in claim 22, characterized in that said removing means comprises means for directing a liquid knife against the downwardly facing strip
surface, at an angle greater than 90° to the direction of strip advance, between the plurality of slots and said downstream roll stand.
25. Apparatus as defined in claim 24, characterized in that said removing means comprises means for directing two liquid knives of respectively different liquids in tandem against the downwardly facing strip surface, each at an angle greater than 90° to the direction of strip advance, between the plurality of slots and said down-stream roll stand.
26. Apparatus as defined in claim 24, characterized in that said removing means further comprises a hold-down roll, around which the strip is trained, in contact with the upwardly facing strip surface at a location such that the liquid knife impinges against the downwardly facing strip surface at a point at which the upwardly facing strip surface engages said hold-down roll.
27. Apparatus as defined in claim 26, characterized in that said removing means further includes means for directing a second liquid knife against the downwardly facing strip surface at a point, between the first-mentioned liquid knife and the said downstream roll stand, at which the upwardly facing strip surface engages said hold-down roll, the second liquid knife being a knife of a liquid different from that of the first knife.