This forces the container downwardly against a forming surface having a configuration corresponding to a desired configuration of {HEAD ~ the pieces} of {TAIL ~ material} 
of
This forces the container downwardly against a forming surface having a configuration corresponding to a desired configuration of { HEAD ~ the pieces } of { TAIL ~ material }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL