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 {HEAD ~ a distance} ranging {TAIL ~ from 2 to 4 times the diameter} of a supporting roller 
ranging
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 { HEAD ~ a distance } ranging { TAIL ~ from 2 to 4 times the diameter } of 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 HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH