The weakened portion 45 is provided by reducing {HEAD ~ width} of the seal by reducing {TAIL ~ the amount} of adhesive 21 between the top and bottom foil sheets 39 and 40 in a specified area 
by reducing
The weakened portion 45 is provided by reducing { HEAD ~ width } of the seal by reducing { TAIL ~ the amount } of adhesive 21 between the top and bottom foil sheets 39 and 40 in a specified area
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH