Air knife device for regulating the thickness of a deposit
AssigneeKvaerner Clecim
InventorsJean Davene, Laurent Dondin
Life of this patent
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Abstract
An air knife device for regulating the thickness of a layer deposited on a strip at the output of a bath, comprising at least one nozzle defined by two lips spaced a small distance apart, the nozzle being supplied with pressurized fluid in order to blow at least one flat jet of fluid onto the strip. The device is associated with at least one fluid cushion stabilizer arranged on at least one side of the nozzle along one of its lips and comprising a substantially flat wall extending from this lip in a direction substantially parallel to the strip so as to define a thin, flat space between the wall and the strip. A fluid is introduced into this space for the formation of a fluid cushion which is able to stabilize the vibrations of the strip.
Claims8
An air knife device for regulating the thickness of a layer of a protective product deposited on a strip leaving a product bath in a feed direction, said device comprising:
- (a) at least one blower nozzle arranged over at least one downstream side of the strip and defined by two lips spaced a small distance apart and defining at least one first elongated orifice extending at least across an entire width of the strip;
- (b) means for feeding the nozzle with a pressurized fluid in order to blow at least one flat fluid jet onto the strip at right angles to the strip;
- (c) at least one flat wall arranged on at least one side of the nozzle in the feed direction and extending substantially parallel to the strip and over a length from an inside edge arranged along the corresponding lip of the nozzle and a small distance from it, so as to define at least one second elongated orifice, the flat wall being spaced apart from the strip by a small distance with respect to the length so as to define a flat space between said wall and the strip;
- and
- (d) means for introducing an additional fluid into said flat space by passing through said second elongated orifice, said additional fluid mixing in said flat space with a portion of the fluid blown by the nozzle to form in said flat space a fluid cushion which is able to stabilize vibrations of the strip.
Dependencies are inferred from the claim text.