Determination of the seal quality of packages

G - Physics – 01 – M

Patent

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G01M 3/36 (2006.01) B07C 5/34 (2006.01)

Patent

CA 2595503

Method and device for determining the seal quality of packages (20), such as bags partially filled with products and protective gas. To this end these bags are directed between two opposing conveyors (3,4), the distance between these conveyors (3,4) being less than the height of the packages (20), so that these are compressed. By taking measurements at one or two locations a verdict can be given on the seal quality of the packages (20). With this arrangement one of the conveyors (3) is set up so that it can be moved relative to the other (4) in order to ensure a more or less constant pressure on the packages (20). In order to achieve an accurate measurement it is proposed to measure the displacement resulting from this pressing on the packages (20) at the conveyor (3) that can be moved, using as reference the subframe (22) of the conveyor (4) that cannot be moved.

L'invention porte sur un procédé et un dispositif de détermination de la qualité d'étanchéité de paquets, tels que des sacs partiellement remplis de produits et d'un gaz de protection. C'est pourquoi, les sacs sont orientés en direction de deux bandes transporteuses opposées, la distance entre ces bandes transporteuses étant inférieure à la hauteur des paquets, si bien qu'ils peuvent être comprimés. La mesure prise au niveau d'un ou deux endroits permet de déterminer la qualité d'étanchéité des paquets. Grâce à ce dispositif, une des bandes transporteuses est conçue de manière à pouvoir se déplacer par rapport à l'autre afin de maintenir une pression plus ou moins constante sur les paquets. Afin d'obtenir une mesure précise, il convient de mesurer le déplacement provoqué de la pression exercée sur les paquets au niveau de la bande transporteuse qui peut être déplacée, en utilisant comme référence le châssis auxiliaire de la bande transporteuse qui ne peut pas être déplacée.

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