air and vacuum forces defined in fig3 in fig7 a 2 time cylinder produces two segments per revolution each segment is cut by anvil 3 coacting with knives in external coacting roll 15 see fig1 and 3 while being held in place by vacuum ports connected to a vacuum source through conduits 28 28 u2032 and grooves 37 referring back to fig2 the lower left corner shows the conduit for vacuum v 2 positioned for sliding operation with grooves in frame 31 at a smaller diameter than v 1 because of offset 38 in fig8 a vacuum conduit end connections 28 communicate with vacuum v 1 and 29 u2032 connections communicate with vacuum v 2 apertures in a surface of the shaped conduit extend vacuum to ports in the carrier surface openings 18 apply pressure a which communicates with an air source not shown in fig8 a anvils 3 are mounted at an angle to radial lines and cutouts 39 provide clearance space for knives 14 see fig1 in fig8 b alternate and simplified mounting of anvil 3 in radial orientation places the tip 41 of the anvil above the periphery for cooperation with coacting knives arranged along a helix as at 42 42 u2032 anvil 3 is locked in place by wedge block 43 slidably shaped surface 44 in fig9 conduit 29 u2032 is mounted in groove 45 in a surface of the cylinder 2 anvil.