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