In FIG 6, the fabric gripping lines are engaged upon {HEAD ~ the top piece} of {TAIL ~ fabric} in the stack 
of
In FIG 6 , the fabric gripping lines are engaged upon { HEAD ~ the top piece } of { TAIL ~ fabric } in the stack
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH