Method and apparatus for forming and hermetically sealing...

B - Operations – Transporting – 65 – B

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B65B 9/06 (2006.01) B65B 9/12 (2006.01) B65B 25/06 (2006.01) B65B 25/08 (2006.01) B65B 35/50 (2006.01)

Patent

CA 2135377

An apparatus and method are provided for forming a hermetically sealed package for a slice of a food item (100) A web of thermoplastic material is first formed into a tubular arrangement with a hermetic longitudinal seal. To form the tubular arrangement, means (12) are provided for folding a continuous web of thermoplastic material into V-folded condition and (20) for continuously forming a hermetic seal along the open longitudinal edge of the V-folded web. The hermetic seal is formed between the inner surfaces of the front and rear faces of the web to define a tubular web member. The food item which has been formed into a soft mass is then inserted into the tubular member and the tubular member is flattened to form a thin film tube. Means (40) are provided for forming a hermetically sealed cross-seal which are disposed substantially transverse to the longitudinal forward moving direction of the web.

Appareil et méthode de fabrication d'un emballage hermétiquement fermé pour une tranche d'un produit alimentaire (100). Une pièce de matériau thermoplastique est d'abord façonnée en un tube muni d'un joint longitudinal hermétique. Le façonnage en tube est réalisé au moyen de dispositifs (12) qui replient en V une pièce continue de matériau thermoplastique et de dispositifs (20) qui façonnent en continu un joint hermétique le long du bord longitudinal ouvert de la pièce repliée en V. Le joint hermétique est façonné entre les surfaces internes des faces avant et arrière de la pièce de façon à définir un élément de pièce tubulaire. Le produit alimentaire, qui a d'abord été transformé en une masse molle, est ensuite inséré dans l'élément tubulaire lequel est par la suite aplati de manière à former un tube à feuil mince. Des dispositifs (40) servent à façonner des joints transversaux hermétiquement fermés lesquels sont disposés quasi transversalement par rapport au sens longitudinal de déplacement vers l'avant de la pièce.

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