Application of zippers to film material

B - Operations – Transporting – 31 – B

Patent

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Details

B31B 19/90 (2006.01) B29C 65/00 (2006.01) B29C 65/18 (2006.01) B29C 69/00 (2006.01)

Patent

CA 2486845

The apparatus applies a transverse zipper strip to a film (10) moving continuously in a direction (12). A continuous belt (18) is driven by sprocket wheels (16a, 16b) and carries upper seal bars (22a, 22b, 22c) which receive pre-cut lengths of zipper at station (3). The pre-cut lengths are attached to the film (10) by a lower seal bar (24) which moves towards the film (12) at position A when an upper seal bar carrying a zipper strip is located directly above the film. Sealing takes place as the upper and lower seal bars move at the same speed as the film (12) from position A to position B where the zipper is released from the upper seal bar (22c). The process then repeats for the next zipper strip length.

L'invention porte sur un appareil appliquant des bandes de fermetures à glissière sur une pellicule (10) se déplaçant en continu dans une direction (12), et comprenant un convoyeur continue (18) entraîné par des pignons dentés (16a, 16b), portant des barres de pose supérieures (22a, 22b, 22c) recevant au niveau du poste (3) des longueurs précoupées de fermetures à glissière qui sont fixées sur la pellicule (10) par une barre de pose inférieure (24) qui se déplace vers la pellicule (12) à la position A, alors qu'une barre supérieure de pose portant une longueur de fermeture à glissière se trouve directement au-dessus de la pellicule. La pose se produit lorsque les barres supérieure et inférieure se déplacent à la même vitesse que la pellicule (12) de la position A à la position B où la fermeture se détache de la barre supérieure (22c). Le processus se répète pour la longueur suivante de bande de fermeture à glissière.

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