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