Cardboard tube closure and box having same closure

Details Cardboard tube closure and box having same closure Cardboard tube closure and box having same closure

B - Operations, Transporting

65

D

B65D 3/12 (2006.01) B65D 51/18 (2006.01)

Patent

CA 2257956

The invention relates to a cardboard tubular casing (1, 2) which is closed to form a tubular sealing system having a cardboard sealing member (3, 4) with a sealing surface (3a, 4a) which is substantially in the plane sealing the tubular casing (1, 2). Only one contact surface (2c, 4c) of a collar (3b, 4b) of the sealing member (3, 4) is connected to a contact surface (1c, 2c) of the casing (1, 2). Connection is simplified by only using one collar (3b, 4b) of the sealing member (3, 4) without a bead but it is still sufficiently strong. The tubular sealing system, for boxes, which is flush with the end surface can also be in the form of a scattering diaphragm with at least one outlet (6) and optionally a cover lug (5). A box with said sealing member (4) can easily be sealed tightly with a cover (3) which can be positioned over the box and is preferably also in the form of a tubular sealing system according to the invention.

Une enveloppe tubulaire en carton (1, 2) est fermée de manière à former une fermeture tubulaire présentant un élément de fermeture en carton (3, 4), dont la surface de fermeture (3a, 4a) se situe sensiblement dans le plan d'obturation de l'enveloppe tubulaire (1, 2). Seule une surface de contact (2c, 4c) d'un rebord (3b, 4b) de l'élément de fermeture (3, 4) est reliée à une surface de contact (1c, 2c) de l'enveloppe. Du fait qu'on utilise uniquement un rebord (3b, 4b) de l'élément de fermeture (3, 4) sans rabattement, la jonction est simplifiée, tout en présentant une solidité suffisante. De plus, la fermeture tubulaire, alignée avec la face terminale, peut être réalisée pour des boîtes, sous la forme d'une membrane à dispersion ayant au moins un orifice de sortie (6) et éventuellement une languette de protection (5). Une boîte munie d'un tel élément de fermeture (4) peut facilement être fermée hermétiquement par un couvercle (3) pouvant se retourner sur la boîte et qui est réalisé, de préférence, également sous la forme d'une fermeture tubulaire conforme à l'invention.

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