adapting the second roller to receive {TAIL ~ additive material} on its roll face from the roll face of {HEAD ~ the first roller} 
adapting the second roller to receive { TAIL ~ additive material } on its roll face from the roll face of { HEAD ~ the first roller }
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD