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