to the inch second manifold housing 56 is provided with a plurality of spaced gas inlet openings 118 fig2 and 3 which communicate with the elongate channel 88 of the first manifold housing 54 along its length to receive pressurized heated air from the first manifold housing 54 into the second gas receiving compartment 110 the continuous slit 115 of the second manifold housing 56 which directs a stream of air into the surface of textile fabric 12 is provided with tubes 126 which communicate at a right angle to the discharge axis of continuous slit 115 to introduce pressurized cool air i e air having a temperature substantially below that of the heated air in third gas receiving compartment 112 at the heated gas discharge outlet 116 to deflect selectively the flow of heated air through the continuous slit 115 in accordance with pattern control information air passing through the tubes 126 may be cooled by a water jacket which is provided with cooling water from a suitable source not shown although such cooling is not required as seen in fig1 pressurized unheated air is supplied to each of the tubes 126 from compressor 38 by way of a master control valve 128 pressure regulator valve 129 air line 130 and unheated air header pipe 132 which is connected by a plurality of individual air supply lines 134 to the individual tubes 126 each of the individual cool air supply lines.