180 for directing the air through air conduit 152 into single piece module 110 and out of air orifice 123 the second direction of air travel is into flow tube 191 through open air control valve 140 into air conduit 152 that intersects tee connection 180 and then into single piece module 110 and out of air orifice 123 it is readily apparent the air flow in both directions merge at the tee connection 180 for combined flow into the single piece module 110 with most of the air flow passing through the air control valve 140 the vertical stacking of rows of single piece modules 110 that make up an array of spray generators 100 creates a problem of dye mist forming droplets contaminating the substrate 10 or other parts of the array 100 a solution to this problem is the utilization of drip shields to provide protection as shown in fig2 there is a top shield 170 that acts as a roof and keeps dirty contaminated dye from dripping onto that row of single piece modules 110 and the dye supply manifold 142 and into the dye return system 148 there are three representations of top shield 170 present in fig2 with one for every row of twelve single piece modules 110 present in the array 100 there are five rows of twelve single piece modules that make up the array 100 dye collects in the.