System for reducing the wiping gas consumption in an air knife
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United States of America Patent
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Dec 22, 2015
Grant Date -
Feb 12, 2015
app pub date -
Feb 13, 2013
filing date -
Feb 21, 2012
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Abstract
The present invention relates to a device for controlling the thickness of a coating made of a liquid film on a moving strip (3), characterized in that automated structure for reducing the gas flow at each of said nozzle sides comprise a moving carriage (10) guiding a retractable cable (9) able to be applied respectively onto and out of the gas discharge opening (4), inside the nozzle chamber (5) and in that, at each transversal side of the nozzle (1), a transition, between an external nozzle section where the gas flow is reduced and an internal nozzle section where the gas flow is not reduced, is assured by two together-moving grooved wheels or pulleys (6, 7) connected to the moving carriage (10), located side by side and having their axis perpendicular to the nozzle, so that the cable (9) is successively located against the opening (4) on an external side of the first pulley (6), between the two pulleys (6, 7) and distant from the opening (4) on an internal side of the second pulley (7).
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