a control system such as is illustrated in u s pat no 3 580 120 is utilized to control the pulses of compressed air through line 42 and into drive cylinder 37 such operation is as indicated conventional attention is now directed to fig2 of the drawings wherein a conventional system is schematically illustrated specifically the feed roll generally designated 50 provides a j folded web such as is illustrated at 51 with the web passing through guide rolls and dancer rolls 52 52 as is conventional the web 51 continues its path and reaches punching stations generally designated 53 and 54 with each of these stations utilizing the punch system as illustrated in fig1 it will be appreciated that only one such station may be employed however for certain operations and applications more than one such station may be utilized draw rolls for the apparatus are illustrated at 55 and a sealing bar is shown at 56 which operates against the surface of sealing roll 57 a pick off assembly is illustrated generally at 58 with the pick off assembly functioning with a conveyor generally designated 59 including upper and lower conveyor runs the punched perforated and separated film bag products are received in the zone 60 with the superimposed stack being illustrated generally at 61 the schematic illustration of fig2 is typical of bag making machines which are in use in commerce at this time specifically the draw rolls 55 55 are arranged to intermittently draw the web 51 along the path from the supply roll 50 to the discharge station as at 60.