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