Opening device, method for manufacturing such opening device and packaging material for use in said method
AssigneeTetra Laval Holdings & Finance S.A.
InventorsPär Andersson, Pär Rydberg, Göran Johansson, Mattias Lennartsson, Thorbjörn Andersson, Per Ohlsson
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Abstract
The present invention relates to an opening device comprising a first portion on one side of a fibre based packaging laminate and a second portion on an opposite side of the fibre based packaging laminate, the first and second portion being formed in one and the same piece and joined by at least one material bridge extending through the packaging laminate. The present invention also relates to a method for manufacturing the opening device and to a packaging material to be used is such a method.
Claims5
A method of manufacturing an opening device, comprising:
- arranging a first mold half comprising a first mold cavity on a first side of a fibre based packaging laminate,
- arranging a second mold half comprising a second mold cavity having a continuous channel on an opposing side of the fibre based packaging laminate,
- wherein the first mold cavity partly overlaps the second mold cavity in one or more overlapping areas, and
- injecting a melt into at least said first mold cavity, wherein the melt, due to pressure being built up in said cavity, penetrates through a part of the fibre based packaging laminate that is not weakened in any way in an overlapping area and fills also at least said second mold cavity for generation of an opening device extending through the packaging laminate,
- wherein, a first portion on one side of a fibre based packaging laminate and a second portion on an opposite side of the fibre based packaging laminate, the first and second portion being formed in one and the same piece and joined by at least one material bridge extending through the packaging laminate.
Dependencies are inferred from the claim text.