Bottles and jars – Neck
Patent
1993-05-14
1995-08-08
Shoap, Allan N.
Bottles and jars
Neck
215238, 215249, 215253, 215261, 220611, 220613, 220266, 220268, 220339, 220375, 22912504, 22912515, 222461, 222561, 222562, B65D 102
Patent
active
054391245
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention is in the field of packing technology and relates to a closure unit for a container for a flowable product, as well as to a production process for said closure unit and a coated cardboard container with a corresponding closure unit.
Containers for flowable products require an opening or a potential opening through which the product can be removed. It is advantageous if, following the first opening, said opening can be resealed, because only then is it possible to handle the container following the first removal of product in the same way as before this has taken place. Therefore most such containers are provided with a closure unit, which can have the most varied forms and shapes and which can be made from the most varied materials. Known examples for such closure units are stoppers made from cork and other materials, screw closures made from plastic or metal, clip or tack closures with ceramic plugs and rubber seals, ground glass stoppers, snap closures made from plastic, etc. Following the initial opening a container without a closure cannot be tightly sealed again. The latter e.g. include glass ampules, many beverage containers made from metal, coated cardboard or plastic.
In the case of containers having a neck, closure units mainly only consist of a closure part, which is mounted on the neck (container closed) or is not located thereon (container open), i.e. which can form a reversible, tight connection with the container. In the case of containers without a neck the closure unit mainly consists of a pouring part (or neck part) and a closure part, the pouring part being connected in a substantially irreversible, tight manner to the container, whereas the closure part and the pouring part together form a reversible, tight connection. In all cases the function of the closure unit is the closing of an opening or potential opening in the container in such a way that the opening can be opened by simple manipulations and then resealed. The closure unit is so designed that between the closure part and the container (closure unit without pouring part) or between the closure part and the pouring part (closure unit with pouring part and closure part) a tight connection can be formed and then removed again with simple manipulations.
The tight sealing of the container is the main function of the closure unit and substantially determines the design and material thereof. However, in many cases the closure unit must also fulfil other functions. These are e.g. in the case of large openings a minimum mechanical support function, in the case of a wine bottle cork a minimum gas permeability, for ease of handling e.g. a permanent connection between the container and the closure part, for safety reasons means which render visible from the outside an initial opening and so on. For the case of a closure unit having a closure part and a pouring part, the most important additional function, apart from the in this case irreversible, tight connection to the container, is the reversible seal between the two parts.
Such a multifunctionality of the closure unit makes obvious such a unit made from several materials, because then for each function it is possible to use an optimum, suitable material.
Numerous closure units made from several materials are known, e.g. a screw cap with a sealing insert (functions: stability/positive engagement, sealing), a cork stopper with a tin cap (functions: sealing, making visible the first opening), a clip closure with a metal clip, the ceramic plug and the rubber seal (functions: connection of the container neck and closure part also in the opened state, mechanical stability and sealing). The disadvantage of all these closure units compared with those made from a single material is that manufacture is made more complicated. Each individual part must be separately manufactured, then the individual parts must be assembled and fixed as a unit to the container, or the individual parts must be fitted to the container in separate steps.
Similar disadvantages a
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Cronin Stephen
Shoap Allan N.
Tetra Laval Holdings & Finance S.A.
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