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