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