In {TAIL ~ one aspect}, {HEAD ~ 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 a supporting roller 
In
In { TAIL ~ one aspect } , { HEAD ~ 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 a supporting roller
REL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD 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