System, method and material for making pneumatically filled...

B - Operations – Transporting – 65 – B

Patent

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Details

B65B 31/06 (2006.01) B31D 5/00 (2006.01) B65B 9/02 (2006.01)

Patent

CA 2397797

System, method and material for making pneumatically filled packing cushions in which a plastic film material (11) having two (12, 13) superposed layers joined together along first (16) and second (17) longitudinal edges is prefabricated at a first location by forming longitudinally spaced, transversely extending rows of perforations (19) across it and sealing it together along seal lines (22, 23) which extend from the first edge (16) of the material in a direction generally parallel to the rows of perforations (19) and terminates at a short distance from the second edge (17) to form chambers (24) with open mouths (25) facing the second edge (17) between the rows of perforations (19). The material is then fan-folded or formed into rolls for storage and shipment. At a second location, gas is introduced into the chambers (24) by passing the material along a tube positioned between the ends of the seals and the second edge of the material and injecting the gas into the open mouths (25) of the chambers (24) through openings in a side wall of the tube. The two layers (12, 13) are then sealed together across the open mouths to close the chambers and retain the gas in them.

L'invention concerne un système, un procédé et un matériau destinés à la fabrication de coussins d'emballage à remplissage pneumatique. Dans ce procédé, un matériau de film plastique (11) constitué de deux (12, 13) couches superposées jointes ensemble, selon des première (16) et seconde (17) bordures longitudinales, est préfabriqué, dans un premier atelier, par formation de rangées, s'étendant transversalement à travers lui, de perforations (19) espacées longitudinalement et par scellement de ces deux couches ensemble le long de lignes de scellement (22, 23) qui débutent de la première bordure (16) du matériau dans une direction généralement parallèle aux rangées de perforations (19) et se terminent à une courte distance de la seconde bordure (17) afin de former des chambres (24) à orifices ouverts (25), faisant face à la seconde bordure (17), entre les rangées de perforations (19). Le matériau est alors plié au moyen d'un ventilateur ou formé en rouleau pour stockage et expédition. Dans un second atelier, du gaz est introduit dans les chambres (24) par passage du matériau le long d'un tube positionné entre les extrémités des scellements et la seconde bordure du matériau et par injection du gaz dans les orifices ouverts (25) des chambres (24) via des ouvertures pratiquées dans une paroi latérale du tube. Les deux couches (12, 13) sont alors scellées ensemble en travers des orifices ouverts de façon à fermer les chambres et à y retenir le gaz.

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