GB1116623A - A machine for setting-up, filling and closing composite bags - Google Patents

Abstract

1,116,623. Packaging-machines; endless conveyers. FRITZ BUSER A.G. 9 Aug., 1965 [10 Aug., 1964], No. 32492/64. Headings B8A and B8C. In a machine for setting-up, filling and closing flattened composite containers, as described in Specification 1,116,624, after the container walls have been moved apart to open the bag, the stiffening strip 81, Fig. 4, is inserted in the bottom of the container between the inner bag 2 and the outer stiffening structure 1, to ensure that the container has a flat base on erection. Subsequently the container is filled and closed. Flattened containers 52, Fig. 2, are fed individually from a magazine 50 by suction device 56, pivotally fixed on the magazine, to a boxlike structure 58. Two groups of horizontally reciprocating suction cups 59, 61 first move through corresponding apertures in the side walls of the structure 58, into engagement with the walls of the container, and then back again to pull them apart. To complete the setting up, horizontally slidable members 63, (60), Fig. 3 (not shown), are moved into engagement with the container bottom, the sloping front of the former engaging under the bottom to press it upwards and flatten it while a spring biased finger (67) on the member 60 enters the space between the bottom of the bag 2 and the outer structure 1. The strip 81, fed from a magazine 80, is then pushed, by a sliding member 100, under the finger (67) and into the gap. The members (60), 63, 100 are then retracted, the suction action of the cups 61 is released and the adjacent side and bottom of the structure 58 are moved away from the container, so that, with the release of the suction action of the cups 59, the container falls freely on to the surface of an intermittently moving conveyer 120 and is held upright by an associated supporting conveyer 115. The conveyer 115 comprises chains 118, 119, transversely connected by rods 116, the distance between the rods 116 corresponding to the width of the containers 52. The fully opened container is then transferred to a filling station 114, guides 142, 143 selectively engaging between the top flaps 8, 9 of the outer structure and the bag mouth to spread the top flaps away from each other so as to open the bag mouth. The container is then filled by device 144. At the outlet end of the filling station 140, guide members 143 are shaped to close the mouth of the inner bag while keeping the flaps 8, 9 spread out as the container moves to the next station 160, at which the mouth of the bag is finally closed and may be sealed. If it is made from material such as plastics-laminated paper, the bag mouth may be heated by elements 161a, 161b as it passes between guide members 164, sealing being effected by rollers 162a having toothed portions which engage the top of the bag. After closing, printing is carried out on the flap 8 by an idler roller 172 as the flap is guided over rail 171. Subsequently the flap 8 is folded down by curved guide 183, and simultaneously the portion 15 of the flap 9 is folded perpendicularly to its flap by guide 181. Glue is applied to the upper surface of the flap 8 by device 187 and the flap 9 is folded over and secured to the flap 8 by guide 184, the portion 15 entering the slot 13. The heights of the various stations 140, 160, 180 and the conveyer 115 are adjustable as a whole relative to the conveyer 120, to accommodate different heights of containers, Fig. 1 (not shown).