Method and apparatus for feeding resiliently compressed...

B - Operations – Transporting – 65 – B

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B65B 9/06 (2006.01) B65B 35/24 (2006.01) B65B 63/02 (2006.01)

Patent

CA 2239184

A method and apparatus for feeding resiliently compressed articles into a form/fill/seal machine. The method includes steps of receiving horizontally compressed articles into an infeed end of a pair of conveyor belts (60, 62), continuously conveying the compressed articles to a discharge end, continuously forming a plastic film around the pair of cantilevered conveyor belts without the stack of articles exerting expansion force against the plastic film, forming and sealing a closed tube, and releasing the stack of compressed articles into the closed tube only after the seal has sufficient strength to maintain the stack of articles compressed. The pair of conveyor belts (60, 62) has rigid conveyor backing members (44, 46) and cantilevered ends (48, 50) with a discharge pulley (54, 58) mounted at each cantilevered end. At least one tie bar connects the backing members near the cantilevered ends in order to resist the expansion force of one or more stacks of resiliently compressed articles between the conveyor belts.

Procédé et dispositif permettant d'alimenter en articles comprimés de manière élastique une formeuse/remplisseuse/scelleuse. Le procédé comprend les étapes suivantes: des articles comprimés horizontalement sont reçus à l'extrémité d'alimentation d'une paire de courroies de convoyeur (60, 62) qui transportent en continu les articles comprimés vers une extrémité de déchargement, un film plastique est formé en continu autour de la paire de courroies en saillie, sans que la pile d'articles exerce une force d'expansion contre le film plastique, un tube fermé est formé puis fermé hermétiquement, et la pile d'articles comprimés est introduite dans le tube fermé seulement à partir du moment où l'obturation est suffisante pour maintenir comprimée la pile d'articles. La paire de courroies (60, 62) comporte des éléments de renforcement rigides (44, 46) et des extrémités en saillie (48, 50) comportant chacune une poulie de déchargement (54, 58). Au moins une barre de liaison relie les éléments de renforcement près des extrémités, afin de résister à la force d'expansion d'une ou de plusieurs piles d'articles comprimés de manière élastique entre les courroies du convoyeur.

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