A control causes relative motion between the conveyer and {HEAD ~ the movable support} means varying the position of {TAIL ~ the deposition} means relative to the substrate 
A control causes relative motion between the conveyer and { HEAD ~ the movable support } means varying the position of { TAIL ~ the deposition } means relative to the substrate
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH