The fingers are movable between a retracted position for insertion into a bag and an extended position in which they can overlap {HEAD ~ the outer surfaces} adjacent to {TAIL ~ each carton corner} 
adjacent to
The fingers are movable between a retracted position for insertion into a bag and an extended position in which they can overlap { HEAD ~ the outer surfaces } adjacent to { TAIL ~ each carton corner }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL