Method and apparatus for making gusseted package

B - Operations – Transporting – 31 – B

Patent

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Details

B31B 1/60 (2006.01) B31B 19/90 (2006.01) B31B 37/00 (2006.01) B65B 9/20 (2006.01)

Patent

CA 2445771

Method and apparatus for making gusseted packages having openable and reclosable interlocking seals, the seals having male and female portions, snap detents, and formed transversely to the direction of film flow. The packaging film is provided at package length intervals with thermoformable strips secured thereto transversely to the running length of the film, and is fed to a modified standard vertical form, fill and seal packaging machine with gussets forming tooling where the film is formed into a bag with the thermoformable strips inside at the upper end of the bag, product deposited into the bag, the bag sealed, the reclosable interlocking seal formed, and the bag severed from the next bag being formed. The reclosable seal provides auditory and tactile indications of seal closing. Some packages are formed with the thermoformable strips in the gusset, and some are formed with the gusset free of strip material.

L'invention concerne des procédés et un appareil permettant de fabriquer des emballages à gousset (34) à joints interblocables (39) pouvant s'ouvrir ou se refermer, lesdits joints comprenant des parties mâle et femelle, des éléments de retenue encliquetables et étant formés transversalement au sens d'écoulement d'un film. Ledit film d'emballage (24) comprend des bandes thermoformables placées à des intervalles égaux à une longueur d'emballage, lesdites bandes étant fixées au film de manière transversale à la longueur de déroulement dudit film. Ce film alimente une machine d'emballage (20) de formage, de remplissage et de scellement verticale normalisée modifiée à l'aide d'outils (50) formant des goussets. On forme le film en un sac doté de bandes thermoformables situées à l'intérieur au niveau de la partie supérieure du sac, on y dépose un produit, on le ferme hermétiquement, puis on forme le joint d'interblocage refermable, et on sépare le sac du suivant. Le joint refermable fourni des indications auditives et tactiles de fermeture. Certains emballages sont formés avec des bandes thermoformables dans le gousset, et certains autres sont formés avec un gousset sans matériau de bande.

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