Abstract: A machine including a control system having a timer for producing bags made from thermoplastic resin films of varying thickness. A pair of feed rollers intermittently feeds a continuous flat tubular web of thermoplastic resin between an upper heat sealing bar and a lower sealing surface. The sealing bar, which approaches but does not contact the web, is heated to effect a weld bead on the web, a cutting edge severs the web adjacent the bead, and the feed rollers advance the web as the sealing bar and cutting edge are withdrawn. A sequencer provides timed control of a motor that operates the rollers and another motor that operates the sealing bar and cutting edge.

Abstract: A bag making machine sealer slitter apparatus for transversely sealing together and severing two layers of a tubular web of thermoplastic resin film, thereby forming a bag wherein the sealer slitter apparatus essentially comprising a sealing mans having two opposing seal bars equipped with heaters and a severing means including a retractable, superheated cutting edge.

Abstract: A method of bundling bags by heat-adhesion comprising the steps of: making holes in bags made of heat-adhesive material; inserting guide rods into the holes of the bags to stack the bags at the correct position; pressing a heated thermal cutter against one end surface of the stacked bags to bond them together by heat-adhesion. Said guide rods are moved in synchronism with the feeding of the bag so as to be inserted into the holes formed in the bag. Said guide rods are inserted vertically slidable through bag holding cylinders having vertical grooves, the guide rods are provided at their top ends with arrows, those rear ends of the arrows that project from the side of the guide rods are hooked on the peripheral edges of the holes of the bag, and as the guide rods are lowered, the rear ends of the arrows are slid downwardly through the grooves of the bag holding cylinders to force the bag down the cylinders.