Opening device and method for manufacturing the same, and a packaging container provided with said opening device
AssigneeTetra Laval Holdings & Finance S.A.
InventorsLeo Persson, Anders Danielsson, Joakim Tuvesson, Pär Andersson, Håkan Hansson, Klaus Specht, Urban Lundmark
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Abstract
An opening device for a packaging container comprises two operational parts: a membrane part ensuring a secure seal of the packaging container and a support part ensuring rigidity for the opening device. The opening device is characterized in that a membrane portion of the membrane part is mechanically attached to the support part to operate as one piece during opening of the packaging container, and the materials of the membrane part and the support part are thermally incompatible.
Claims13
An opening device for a packaging container, comprising two operational parts, a support part configured to ensure rigidity for the opening device and a membrane part configured to ensure a secure seal of the packaging container, wherein a membrane portion of the membrane part is mechanically attached to the support part by means of at least one opening in the support part into which the membrane portion extends to operate as one piece during opening of the packaging container, the membrane part further comprising a weakening line along which it is configured to rupture upon opening, wherein the material of the membrane part is thermally incompatible with a material of the support part to avoid fusion, bonding, or adhesion between the two operational parts during manufacture of the opening device, and wherein the opening is encircled by a groove arrangement radially inside the weakening line, the groove arrangement forming a closed path into which the membrane part extends.
Dependencies are inferred from the claim text.