The timing means 32 for {HEAD ~ generates pulses} of preset or varying frequencies and predetermined or varying durations in circuit 30 with the valve means 17 for {TAIL ~ intermittent delivery} of droplets 27 of material to the substrate 11 
The timing means 32 for { HEAD ~ generates pulses } of preset or varying frequencies and predetermined or varying durations in circuit 30 with the valve means 17 for { TAIL ~ intermittent delivery } of droplets 27 of material to the substrate 11
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH