System and method for forming an integrated tray for use in...

B - Operations – Transporting – 65 – D

Patent

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B65D 81/26 (2006.01)

Patent

CA 2517894

A bag for use in vacuum packaging can comprise a first panel (320) and a second panel (322) overlapping each other. One or more trays (230) for retaining a perishable or other product is formed on one or more of the panels. Each tray can optionally have ridges (234) for suspending a product above the tray so that liquid can collect in the tray. In one embodiment, a method for forming such a bag between a cooling roll (104) and laminating roll (102) includes feeding a gas-impermeable material (108) to a nip formed between the rolls. Resin is extruded to the nip such that the resin fills a plurality of cavities of the cooling roll, forming an inner layer that adheres to the gas-impermeable material. A resultant sheet is then folded to form the first and second panel and sealed such that an envelope is formed.

Poche pour emballage sous vide pouvant comprendre un premier et un second panneaux se recouvrant l'un l'autre. Un ou plusieurs plateaux destinés à recevoir des produits périssables ou autres sot formés dans au moins un des panneaux. Chaque plateau peut éventuellement comporter des rebords permettant de recueillir du liquide dans le plateau. Dans un mode de réalisation, l'invention concerne un procédé de fabrication d'un tel sac consistant à introduire un matériau imperméable aux gaz dans l'espace entre un rouleau de refroidissement et un rouleau de laminage. De la résine est extrudée dans l'écartement entre rouleaux se telle sorte qu'elle remplisse une pluralité de cavité dans le rouleau de refroidissement et forme une couche intérieure qui adhère sur le matériau imperméable aux gaz. La feuille ainsi obtenue est repliée pour former un premier et un second panneau, puis scellée pour former une poche. Pour d'autres caractéristiques, aspects et objets de l'invention, se reporter au spécifications, chiffres et caractéristiques.

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