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