B - Operations – Transporting – 65 – D
Patent
B - Operations, Transporting
65
D
B65D 77/04 (2006.01) B65B 7/06 (2006.01) B65D 30/08 (2006.01) B65D 75/58 (2006.01) B65D 77/12 (2006.01)
Patent
CA 2280760
Packaging such as a block-base sack (201) suitable for packing of particulate material has an inner bag (not shown) having two layers of polyethylene, surrounded by an outer bag (201) having three layers of polyethylene. Each bag has a closed bottom and an open top (208) prior to filling. After filling of the inner bag, the inner bag is closed by a first heat seal along zone (205) in a heat sealing operation which can be performed through the outer bag (201) in such a way that the outer bag (201) is not heat sealed to the inner bag at that point. The outer bag (201) is closed by a second seal (207) located between the first seal (205) and the top of the bag (208). A frangible zone (206) is located between the first (205) and second (207) heat seals to enable the outer bag (201) to be removed from the sealed inner bag by cutting or tearing along the frangible zone (206).
L'invention concerne un emballage tel qu'un sac à fond croisé (201) indiqué pour l'emballage d'une matière particulaire, comprenant un sac intérieur (non illustré) comportant deux couches de polyéthylène, entouré d'un sac extérieur (201) comportant trois couches de polyéthylène. Chaque sac présente un fond fermé et un haut ouvert, avant remplissage. Après remplissage du sac intérieur, ce dernier est fermé par un premier thermoscellage le long de la zone de scellement (205), le procédé de thermoscellage pouvant s'effectuer à travers le sac extérieur (201) de telle façon que le sac extérieur (201) ne soit pas thermoscellé au sac intérieur à cet endroit. Le sac extérieur (201) est fermé par un deuxième thermoscellage (207) entre le premier thermoscellage (205) et le haut du sac (208). Une zone frangible (206) se situe entre le premier (205) et le deuxième (207) thermoscellage pour qu'on puisse séparer le sac extérieur (201) du sac intérieur scellé en coupant ou en déchirant la zone frangible (206).
Bourne Anthony
Kohn Uwe
Wood Alexander Charles
Cryovac Inc.
H. A. Holmes & Co. Limited
Smart & Biggar
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