struts 34 which are spaced apart along the width of the nozzle 30 see fig3 and extend rearwardly beyond the ends of members 31 and 32 struts 34 are unified by a baffle 35 which extends across the entire width of nozzle 30 and serves as a baffle for diffusion of gas being dispensed therefrom note that baffle 35 has a cutaway portion 36 along a central location thereof wall members 22 adjacent nozzle 30 are provided with an adjustment member 24 member 24 is hand actuated by means of jacking and or clamping screws movement of adjustment member 24 inwardly or outwardly will cause a slight deflection of members 31 and 32 that define nozzle throat 37 whereby a predetermined relationship may be established in the nozzle 30 so as to further delineate the type flow pattern of the gas exiting therefrom gas flow from within vessel 20 will not flow directly into the throat 37 of nozzle 30 instead baffle 35 is encountered and the air or other gas flows around baffle 35 between struts 34 as shown by the arrows in fig2 in this fashion the angle of air exiting from nozzle 30 is better controlled insofar as gas impingement on the fabric is concerned it should be pointed out that angular impingement of the gas on the fabric is undesirable to the point that the fabric may be moved away from the treating zone in a direction to the right or left of the longitudinal axis of the nozzle 30 obviously the force of the gas exiting the nozzle 30 will force the fabric directly away from the slot but a lateral or sidewise motion.