In one aspect, 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 {HEAD ~ from 2 to 4 times the diameter} of {TAIL ~ a supporting roller} 
of
In one aspect , 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 { HEAD ~ from 2 to 4 times the diameter } of { TAIL ~ a supporting roller }
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 HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL