B - Operations – Transporting – 31 – B
Patent
B - Operations, Transporting
31
B
B31B 1/90 (2006.01) B31B 1/84 (2006.01) B31B 3/00 (2006.01) B65D 5/72 (2006.01) B65D 5/74 (2006.01)
Patent
CA 2298650
An object is to prevent roughening of a rupture surface of a packaging material (12) that is formed upon opening of a spout (21) through application of an external force. There are provided transport means for transporting a layered packaging material (12) that is formed of a paper substrate and resin films and that has a rupture area (52) at a location corresponding to that of opening means; a seal unit for sealing the packaging material (12); and heating means disposed on the upstream side of the seal unit in the transport direction of the packaging material (12) such that the heating means is opposed to an innermost layer of the packaging material (12) in order to heat the packaging material (12). In this case, after being heated and melted, the resin film of the packaging material (12) is gradually cooled. As a result, thermoplastic resin that constitutes the resin film is crystallized and becomes brittle. Accordingly, when an external force is applied by use of the opening means to thereby open the spout (21), the resin film does not stretch. As a result, the packaging material (12) can be easily ruptured, and the rupture surface of the packaging material (12) is prevented from being roughened, because the resin film does not have ruptured and stretched portions coexisting in a mixed manner.
L'invention porte sur un procédé empêchant la surface d'un matériau d'enrobage (12) de devenir rugueuse lors de l'ouverture d'un bec verseur (21) sous l'effet d'une force extérieure. On utilise dans ce but: un processeur de matériau d'enrobage (12) doté de moyens de transfert dudit matériau (12) lequel présente une structure multicouche faite d'un substrat de papier, d'une couche de résine, et d'une zone (52) de découpe correspondant à des moyens d'ouverture; un dispositif de fermeture du matériau d'enrobage (12); et un moyen de chauffage du matériau d'enrobage (12) placé en amont du dispositif de fermeture à l'opposé de la couche la plus intérieure du matériau d'enrobage (12). Le film de résine du matériau d'enrobage (12) est progressivement refroidi après chauffage et fusion ce qui cristallise et fragilise la résine thermoplastique le composant, et empêche son étirement lors de l'ouverture du bec verseur (21) sous l'effet de la force extérieure du moyen d'ouverture. Cela permet non seulement de rompre facilement le matériau d'enrobage (12), mais de faire coexister la partie rompue et la partie étirée du film de résine éliminé et d'empêcher la surface du matériau d'enrobage (12) de devenir rugueuse.
Katsumata Shigeo
Kumeta Yukihisa
Moriyama Yasuyuki
Marks & Clerk
Tetra Laval Holdings & Finance S.a.
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