After edge 23 is secured to glue flap 24, the left and right edges of the blank 21 are pushed toward each other so that {HEAD ~ the sides} 18 of {TAIL ~ the first container} 11 move away from each other 
of
After edge 23 is secured to glue flap 24 , the left and right edges of the blank 21 are pushed toward each other so that { HEAD ~ the sides } 18 of { TAIL ~ the first container } 11 move away from each other
OTH OTH OTH OTH 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 OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH