a second pair of driven rollers 188 and 190 in the output zone of the passageway 172 serve as pick up rolls to remove the severed web segments 194 after the web has been cut by the cooperating cutter roll 144 and slot roll 164 and passes through a web guide 198 as indicated schematically in fig4 and as also seen in fig3 each of the cutter rolls and each of the slot rolls of roll assembly 24 carries a sprocket wheel 202 and 204 affixed to the cutter roll axles 210 and to the slot roll axles 212 also as shown in fig3 and as indicated schematically in fig4 the center axle 110 of the roll assembly 24 carries a hub assembly 220 having two axially spaced sprocket wheels 224 and 226 a roller chain 230 is trained over one of the sprocket wheels 226 of the hub 220 and over the sprocket wheels 202 and 204 of one pair 140 and 156 of the cutter rolls and slot rolls while a second roller chain 240 is trained over the sprocket wheel 224 of the center axle 110 and over the sprocket wheels 202 and 204 of the other pair of cutter rolls and slot rolls 144 and 160 the assemblies described include suitable spacer or take up rollers 250 for maintaining the drive chains 230 and 240 in proper tension tie rods 254 extending longitudinally through.