The drum is in the form of a pair of closely spaced discs having perimetral, cylindrically contoured sealing surfaces for support and, in cooperation with driven metal belts, transport of {HEAD ~ a web} being formed into {TAIL ~ dunnage units} 
formed into
The drum is in the form of a pair of closely spaced discs having perimetral , cylindrically contoured sealing surfaces for support and , in cooperation with driven metal belts , transport of { HEAD ~ a web } being formed into { TAIL ~ dunnage units }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL