means for moving said carriage in the machine direction in {HEAD ~ response} to {TAIL ~ movement} of said strip, 
means for moving said carriage in the machine direction in { HEAD ~ response } to { TAIL ~ movement } of said strip ,
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH