FIG 4 is a sectional view showing the first step forming {HEAD ~ a package} according to {TAIL ~ the invention}  
according to
FIG 4 is a sectional view showing the first step forming { HEAD ~ a package } according to { TAIL ~ the invention }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH