SYSTEME POUR REDUIRE LA CONSAMMATION DE GAZ DE LISSAGE DANS UNE LAME D'AIR.

摘要

The present invention relates to a device for controlling the thickness of a coating made of a liquid film on a moving strip (3), comprising a nozzle (1) fed with a pressurized gas (11) in a chamber (5) of the nozzle, said chamber (5) being terminated by nozzle lips making an elongated opening (4) for discharging the pressurized gas onto the moving strip (3), said elongated opening (4) being provided with automated means for reducing the gas flow at each transversal side of the nozzle (1) outside the strip width, characterised in that said automated means 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).