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1. EP0394497 - FEUILLE D'AMORTISSEMENT GONFLABLE DU TYPE AUTO-SCELLANT.

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ FR ]
Claims

1. An inflatable self-seal type buffer sheet comprising:

a séries of individual air bags made of heat-sealable material, which are inflatable independently, but normally in flat shapes, and

at least one air blow tube also made of heat-sealable material and penetrating said air bags longitudinally and bonded thereto, said air blow tube or tubes being equipped with slits or slots forming self-seal type check valves at positions inside the respective air bags.


  2. The inflatable self-seal type buffer sheet as claimed in Claim 1 wherein said individual air bags are spaced apart from each other and said air blow tube penetrates said spaced apart air bags and is bonded to the opposite ends of each air bag by heat-sealing, the inside surfaces of said air blow tube at heat-sealed positions being left unadhered as open air passage.
  3. The inflatable self-seal type buffer sheet as claimed in Claim 1 wherein said séries of individual air bags are formed from a heat-sealable tubular member of continuous length through which said air blow tube is inserted and on which transverse heat-sealings are made at positions not overlapping with said slits or slots on the air blow tube to yield longitudinally consécutive individual air bags.
  4. The inflatable self-seal type buffer sheet as claimed in Claim 1 wherein a plurality of air blow tubes penetrate in parallel said individual air bags.
  5. The inflatable self-seal type buffer sheet as claimed in Claim 1 wherein said series of air bags are formed by providing upper and lower heat-sealable films of continuous length and of relatively vide width, heat-sealing said two films along their both side edges to form a continuous tubular member, and, in addition, providing upper and lower heat-sealable film stips of narrower width and slightly longer than the tubular member, forming slits or slots to be self-sealable valves at predetermined distances on either of said film strips, applying non-heat-sealable coatings on the inner surface of either of said film strips, then heat-sealing said two film strips along their both side edges to form said air blow tube which is inserted into and through said tubular member with at least its one end protruding from the end of said tubular member, and performing transversely heat-sealing operations on said tubublar member at its ends and at positions not overlapping with said slits or slots on the air blow tube to thereby yield longitudinally consecutive individual air bags.
  6. The inflatable self-seal type buffer sheet as claimed in Claim 5 wherein said non-heat-sealable coatings are formed by heat-resistant silicone releasing compositions, colored or uncolored.
  7. The inflatable self-seal type buffer sheet as claimed in Claim 6 wherein said non-heat-sealable coatings are applied partially to the areas on the film strip over which said transverse heat-sealings are to be made.
  8. The inflatable self-seal type buffer sheet as claimed in Claim 5 wherein said transverse heat-sealings are comprised of paired seal lines spaced apart by narrow widths.