{TAIL ~ The apparatus} 1, wherein the axis of each of the supporting rollers is spaced from the axis of an adjacent supporting roller or of a driving roller by a distance ranging from 2 to 4 times the diameter of {HEAD ~ a supporting roller} 
{ TAIL ~ The apparatus } 1 , wherein the axis of each of the supporting rollers is spaced from the axis of an adjacent supporting roller or of a driving roller by a distance ranging from 2 to 4 times the diameter of { HEAD ~ a supporting roller }
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD