Method and apparatus for twisting a wireless twist tie

B - Operations – Transporting – 65 – B

Patent

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Details

B65B 51/08 (2006.01)

Patent

CA 2272879

A bag neck tying device (10) for tying a ribbon (15) about gathered material. The bag neck tying device (10) includes a bag gathering mechanism (20) for moving a bag neck into engagement with a bag stop lever (80) controlled by an electric brake (82), The bag neck tying device further includes a needle assembly (40) for wrapping the ribbon around the gathered neck of the bag, a twister hook assembly (50) for twisting the ribbon of tie material and a ribbon holder-shear assembly (60) for cutting and holding the end of the ribbon. The twister hook assembly (50) has a ribbon guide surface (58) configured to position the ribbon such that the hook (54) grip tails of the ribbon to form ties in non-metallic ribbon. The holder-shear assembly has surfaces (64, 68, 69) configured to extrude and positively grip the end of the ribbon.

L'invention porte sur un dispositif (10) de fermeture par torsion de la gueule d'un sac, ce dispositif permettant de tordre un ruban (15) autour d'un matériau froncé. Le dispositif (10) de l'invention comprend un mécanisme (200) destiné à froncer le sac et déplaçant la gueule du sac pour que celle-ci vienne en contact avec un levier d'arrêt (80) commandé par un frein électrique (82). Le dispositif de fermeture par torsion de la gueule d'un sac comprend un ensemble (40) aiguille qui permet d'entourer le ruban autour de la gueule froncée du sac, un ensemble crochet de torsion (50) qui tord le ruban de matériau d'attache et un ensemble de retenue cisaillement (60) destiné à couper et retenir l'extrémité du ruban. L'ensemble crochet de torsion (50) comporte une surface (58) de guidage conçue pour positionner le ruban de sorte que le crochet (54) saisisse la queue du ruban de façon à former des liens dans un ruban non métallique. L'ensemble de retenue-cisaillement comporte des surfaces (64, 68, 69) configurées pour extruder et saisir franchement l'extrémité du ruban.

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