Envelopes – wrappers – and paperboard boxes – Paperboard box – With closure for an access opening
Patent
1996-11-05
1999-03-02
Elkins, Gary E.
Envelopes, wrappers, and paperboard boxes
Paperboard box
With closure for an access opening
22912504, 22912505, 493 87, 493102, 493114, B65D 572
Patent
active
058759581
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a cuboid flat gable composite package, in particular a tab package with central seam or corner seam, with the composite having at least one carrier layer made from paper or cardboard, a coupling layer, an oxygen barrier layer preferably made from aluminium, and a double-sided plastic coating made from polyethylene (PE), with an opening area provided in the package gable which forms the pour opening after the severing, with a pouring element provided with a reclosable closing lid being hinged thereto in one piece and whose flange encompassing the opening area is rigidly connected to the package surface and whose closing lid is provided with a tubus corresponding to the shape of the opening area, as well as to a process to produce such a flat gable composite package.
Cuboid flat gable packages are known in numerous arrangements. They are used predominantly in the field of liquid packages in connection with cold, cold-sterile, hot and aseptic fillings. These packages can usually not be closed any more once they are opened.
It has therefore already been proposed in connection with flat gable composite packages of the kind mentioned above to arrange a pouring element in the package gable which is equipped with a respective closing lid (DE 38 08 303 A1). A circular severing line to weaken the gable material is provided in the zone of the cardboard layer and the outer PE layer, into which a respective tubus, which is connected with the closing lid in one piece and corresponds to the shape of the circular severing line, is pressed into the package material in order to open the package. For the purpose of easier severing of the weakened severing line, the lower edge of the tube is provided with suitable mechanical opening means such as blades or the like.
The aforementioned flat gable composite package can be improved in respect of several items. It is clear that for the purpose of storage and transportation it must be ensured that the tubus connected with the closing lid must not penetrate the material prior to the first use of the package. For this purpose a strap is provided according to the current state of the art for this kind of inventions which fixes at a specific distance the closing lid and the flange of the pouring element which circles the severing line. Only after the removal of the strap is it possible to push the opening tubus into the package composite material by pressing in the closing lid. This leads to the consequence that a certain minimum height of the known pouring element is mandatorily required. This is a disadvantage owing to the stackability required for flat gable composite packages.
Another possibility is that package piece separated from the tube is detached completely from the remaining package composite and thus reaches the liquid. This is not hygienic and can also lead to problems in the pouring when the piece of the package composite freely swimming in the liquid partly or entirely "blocks" the pour opening or even reaches the drinking vessel through the pour opening.
Starting out from this, the present invention is based on the object of providing and further developing a cuboid flat gable composite package of the type mentioned above and a process for its production, so that the overall height of the pouring element used is reduced and a perfect pouring is reliably ensured.
With respect to the flat gable composite package, the solution to this object consists of omitting the carrier layer in the zone of the opening area and of providing on the package gable in the interior of the opening area which is sealed over an opening aid for pulling out the composite portion situated in the zone of the opening area.
With respect to the production process of such a flat gable composite package, the object is achieved by the following steps: pour opening; the package floor; area of the completed package.
As a result of the fact that the package surface is provided with a PE layer, it is particularly favourable that both the flange of the pouring element encompassing
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Dammers Matthias
Weiteder Hans Josef
Elkins Gary E.
PKL Verpackungssysteme GmbH
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