Method for carrying out ventilation in a multi-walled container

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 49/48 (2006.01) B05B 11/00 (2006.01) B29C 49/04 (2006.01) B29C 49/22 (2006.01) B65D 83/00 (2006.01)

Patent

CA 2521086

The invention relates to a method for carrying out ventilation in a multi-walled container of the type comprising a rigid external housing (2), inside which a flexible inner pocket (3) for containing a product is arranged and connected to a withdrawal device without ventilation, said layers (2, 3) having no adhesion between the same such as to be able to be separated without difficulty and with air ventilation (7) between the same, characterised in being obtained by means of moulding a projection (9) at the upper or lower part of the pre-form (5) which is subjected to a first operation of cutting a sprue (6), then a second operation of cutting said projection (9) in a region close to the base and/or the neck of the recipient (1) for production and a third operation of separating the layers (2, 3).

Procédé de réalisation d'une reprise d'air dans un récipient multiparois, du type constitué par un boîtier externe rigide (2) à l'intérieur duquel est disposée une poche souple (3) destinée à contenir un produit et en liaison avec un organe de prélèvement sans reprise d'air, lesdites couches (2, 3) ne présentant aucune adhésion entre elles de sorte à se délaminer sans difficulté, et comportant entre elles une reprise d'air (7), caractérisé en ce qu'elle est obtenue en réalisant par moulage une excroissance (9) à la partie supérieure et/ou inférieure de la paraison (5), destinée à subir une première opération de sectionnement d'une carotte (6), puis une seconde opération de sectionnement de ladite excroissance (9) dans une zone proche du fond et/ou de l'embout du récipient (1) à obtenir et une troisième opération de délaminage des couches (2, 3).

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