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