As shown, two separating units 1 on the left side of frame 2 hold a stack of insert material while the separating unit 1 on the right holds {HEAD ~ a stack} of newspapers or {TAIL ~ other material} 
of
As shown , two separating units 1 on the left side of frame 2 hold a stack of insert material while the separating unit 1 on the right holds { HEAD ~ a stack } of newspapers or { TAIL ~ other material }
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 REL OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL