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