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