Pre-stretched film, and apparatus and a method for outer...

B - Operations – Transporting – 65 – B

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Details

B65B 11/28 (2006.01) B29C 55/06 (2006.01) B65B 11/04 (2006.01) B65D 71/00 (2006.01) B65D 75/00 (2006.01)

Patent

CA 2191663

The present invention relates to a pre-stretched film, and to apparatus and a method of applying outer packaging to packages and to loads, optimized as a function of the structure and in particular the shape of the package or the load, in particular a palletized load, and also as a function of the-transport and handling that the package or the load must be capable of withstanding without the outer packaging being dislocated. According to the invention, a stretchable film is stretched over at least one roller of diameter that varies along its axis of rotation so as to form parallel longitudinal zones in the film that have different degrees of stretching. These zones make it possible, in particular, to track the external outlines of objects to be packaged and/or to provide locally-reinforced bonding, or on the contrary to present surfaces that are more relaxed. The present invention applies in particular to packaging and grouping together loads that may optionally be palletized. The main application of the present invention lies in grouping together bottles of beverages.

a présente invention a trait à une pellicule pré-étirée ainsi qu' à un appareil et une méthode pour appliquer un emballage extérieur sur des paquets et des charges, optimisé en fonction de la structure et en particulier de la forme du paquet ou de la charge, en particulier une charge palettisée, et aussi en fonction du transport et de la manutention que le paquet ou la charge doit être capable de supporter sans que l'emballage extérieur soit défait. Selon l'invention, une pellicule extensible est tendue sur au moins un rouleau dont le diamètre varie le long de son axe de rotation de manière à former des zones longitudinales parallèles dans la pellicule ayant divers degrés d'extension. Ces zones permettent, en particulier, de suivre les contours extérieurs d'objets à emballer et/ou de donner localement une cohésion renforcée ou, au contraire, de présenter des surfaces plus relâchées. La présente invention s'applique spécialement à l'emballage et au groupement de charges qu'on peut choisir de palettiser. La principale application de la présente invention consiste à grouper des bouteilles de boisson.

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