By this construction, {HEAD ~ the edges} of {TAIL ~ the opening} in the paperboard are sealed and cannot contaminate the liquid within a carton formed from the blank 
of
By this construction , { HEAD ~ the edges } of { TAIL ~ the opening } in the paperboard are sealed and can not contaminate the liquid within a carton formed from the blank
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH