providing a first roller adapted to receive the additive material within a plurality of {HEAD ~ spaced apart pockets} located on {TAIL ~ its roll face} 
located on
providing a first roller adapted to receive the additive material within a plurality of { HEAD ~ spaced apart pockets } located on { TAIL ~ its roll face }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL