The apparatus 1, wherein {HEAD ~ the axis} of each of the supporting rollers is spaced from {TAIL ~ 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 
is spaced from
The apparatus 1 , wherein { HEAD ~ the axis } of each of the supporting rollers is spaced from { TAIL ~ 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
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH REL REL REL 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