Moving to FIG 7, air piston arrangement 50 has been activated to move {HEAD ~ elements} 48, 48 toward {TAIL ~ lines} I, I, respectively as indicated by the arrows 
toward
Moving to FIG 7 , air piston arrangement 50 has been activated to move { HEAD ~ elements } 48 , 48 toward { TAIL ~ lines } I , I , respectively as indicated by the arrows
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH