In FIG 8, the movable and stationary elements have gripped the sheet and in FIG 9, {HEAD ~ the sheet} is lifted separately from {TAIL ~ the stack} 
is lifted separately from
In FIG 8 , the movable and stationary elements have gripped the sheet and in FIG 9 , { HEAD ~ the sheet } is lifted separately from { TAIL ~ the stack }
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 REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL