A method of producing a blank of packaging laminate as well...

B - Operations – Transporting – 32 – B

Patent

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B32B 3/02 (2006.01) B65D 65/40 (2006.01) B29C 65/36 (2006.01) B32B 15/08 (2006.01) B32B 37/00 (2006.01) B65B 51/22 (2006.01)

Patent

CA 2586090

The disclosure relates to a method of producing a blank (50a, 50b) of thermosealable and creased packaging laminate for a microwave-friendly packaging container, comprising the steps of: (a) advancing a continuous web (1) of a base laminate (10) in a conversion line for the packaging laminate so that continuous blanks for said packaging containers are oriented with their top-to-bottom direction transversely of the machine direction of the conversion line and with a top-to-bottom interface (51), (b) providing said base laminate (10) with creases and cutting into said blanks (50a, 50b) of the packaging laminate, a continuous strip (2) of a material which conducts heat and electricity being applied in the machine direction in a region over said top-to-top/bottom interface (51) and in conjunction with step (a), and an elongate opening indication (53) being provided, before or after the application of the strip (2) so that the opening indication is positioned within the region of said strip. The disclosure also relates to a thus produced blank, as well as a packaging container which is formed using such a blank as the point of departure.

L'invention concerne une méthode de production d'un flan (50a, 50b) constituée d'un stratifié de conditionnement thermoscellable et plissé destiné à un contenant de conditionnement convenant aux micro-ondes. Cette méthode comprend les étapes consistant à: (a) faire avancer une bande continue (1) d'un stratifié de base (10) sur une ligne de conversion destinée au stratifié de conditionnement, de sorte que les flans continus destinés aux contenants de conditionnement sont orientés de sorte que leur direction "dessus-vers-fond" soit transversale par rapport au sens machine de la ligne de conversion et par rapport à l'interface "dessus-vers-fond" (51), (b) fournir un stratifié de base (10) présentant des plis et découper dans les flans (50a, 50b) du stratifié de conditionnement une bande continue (2) de matière conduisant l'électricité et la chaleur, appliquée dans le sens machine, dans une zone située au-dessus de l'interface "dessus-vers-dessus/fond" (51) et conjointement à l'étape (a), et une indication d'ouverture allongée (53) étant fournie, avant ou après l'application de la bande (2), de sorte que l'indication d'ouverture est positionnée à l'intérieur de la zone de ladite bande. L'invention concerne également un flan ainsi produit, ainsi qu'un contenant de conditionnement formé au moyen du flan susmentionné utilisé comme matière première.

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