Two pairs of feed rollers are provided, one at {HEAD ~ each side edge} of the sheet, each pair defining {TAIL ~ a nip} associated respectively with one of the opposite side edge portions of the sheet 
Two pairs of feed rollers are provided , one at { HEAD ~ each side edge } of the sheet , each pair defining { TAIL ~ a nip } associated respectively with one of the opposite side edge portions of the sheet
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH