providing a second roller adjacent to the first roller and moving {HEAD ~ the second roller} into roll contact with {TAIL ~ the first roller} 
providing a second roller adjacent to the first roller and moving { HEAD ~ the second roller } into roll contact with { TAIL ~ the first roller }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL