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