Patent ID: 8771588

Claim:
A device for blowing gas on a face of traveling strip material, the device comprising: at least one hollow box defined by at least one side wall and a wall facing towards a corresponding face of the strip material fitted with a plurality of blow orifices enabling gas to be directed towards said face of the strip material, wherein the hollow box is also fitted laterally on at least one side thereof relative to a midplane (Q) perpendicular to a plane in the strip with a movable shutter member having a function of selectively shutting some of the blow orifices in order to adapt a width of the blow zone to a width of a corresponding strip material, wherein said movable shutter passes through a slot that extends through a side wall of the hollow box, such that said movable shutter is movable, via said slot, in translation in a lateral direction in a vicinity of and parallel to the inside surface of the wall fitted with the blow orifices.