Container wall of paper and process for producing such a...

B - Operations – Transporting – 31 – B

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B31B 43/00 (2006.01) B65D 3/02 (2006.01) B65D 3/04 (2006.01)

Patent

CA 2432629

A container wall of paper (10, 22) for a container with a predominantly circular or elliptic cross-section is disclosed. The paper is a highly extensible Kraft paper, preferably with an extension of 5% to 20%. The container wall ((10, 22) has at least one inwards or outwards (12, 14, 16, 26) from the periphery (20, 14, 32) extending portion. The containers produced with the container wall may be bottles, cans, jars, disposable, cups, drinking glasses, barrels, and vases. Further, a process of producing a container wall of paper (10, 22) is described. In the process highly extensible Kraft paper is pressed between a hard form providing the shape of the container wall (10, 22), and a matching hard counter form; a soft flexible counter form which under pressure follows the shape of the hard form, and liquid or gas that under pressure forces the paper to follow the shape of the hard form.

La présente invention concerne une paroi de conteneur en papier (10, 22) destinée à un conteneur de section transversale essentiellement circulaire ou elliptique. Le papier est un papier kraft hautement extensible, de préférence offrant une extension de 5 à 20 %. La paroi de conteneur (10, 22) possède au moins une partie s'étendant vers l'intérieur ou vers l'extérieur (12, 14, 16, 26) depuis la périphérie (20, 14, 32). Les conteneurs produits avec cette paroi de conteneur peuvent être des bouteilles, des boîtes, des bocaux, des tasses jetables, des gobelets, des barils et des vases. L'invention se rapporte également à un procédé de production d'une paroi de conteneur en papier (10,22), selon lequel on presse un papier kraft hautement extensible entre une forme dure possédant la forme de la paroi de conteneur (10,22) et : une contre-forme dure correspondante ; une contre-forme souple qui, sous la pression, adopte la forme de la forme dure ; ou un liquide ou un gaz qui, sous la pression, force le papier à adopter la forme de la forme dure.

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