Dispensing – With cutter and/or punch – To form dispensing opening in container
Patent
1996-06-19
1998-05-26
Shaver, Kevin P.
Dispensing
With cutter and/or punch
To form dispensing opening in container
220277, 2225412, 222566, 229204, B65D 5122
Patent
active
057553599
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention concerns an arrangement for opening a pack, on the top wall of which are provided means for opening and re-closing same.
There are packs which are made from plastic-coated paper by folding and sealing and in the upper end portion of which a hole is left in the paper at a corner in such a way that the hole is closed by an injection-molded rib of plastic material, and joined to a tongue. From the location of the pouring edge, the rib extends a distance towards the center of the upper end portion of the pack and is there joined by way of a pin of a mushroom-like configuration in cross-section, through a hole in the top wall. To open the pack, the user grips the injection-molded tongue and tears up the rib which is disposed predominantly in the interior of the pack, along a perforation in the paper of the upper end portion of the pack, in order to form a tear-open tongue and thus a pouring opening. To provide the opening arrangement, that known pack requires a comparatively expensive injection-molding procedure in the region of the upper end portion of the pack. In the case of an aseptic pack, the holes and openings in the top wall of paper, which are closed by the plastic material injection-molded therein, cannot be provided with the necessary gas barriers, for example a metal foil.
In the case of another fluid pack which consists entirely of filled plastic material, a hole in the upper end portion of the pack is closed by a two-part opening arrangement which is of a flat configuration in such a way that no parts thereof project beyond the overall contour of the top wall. This involves a prefabricated opening arrangement which is kept in a magazine and which comprises a lower portion and an upper portion which are connected together by way of a hinge-like fold line. For sealing purposes, a thin plastic foil is disposed between the lower and upper portions and fixed on the lower portion, thereby guaranteeing sealing integrity. That known opening arrangement presupposes a hole with an upstanding collar in the top wall of the pack in order to afford possible ways of providing an anchorage effect. In the case of an aseptic pack the hole region would have to be especially covered over.
An opening arrangement of plastic material which is sealed on to a liquid pack of paper, provided with suitable perforation lines, is also known. That opening arrangement comprises a first outer portion with an edge to assist with pouring, and a second inner portion which is arranged internally separately therefrom at a spacing relative thereto and is movable relative to the outer portion, both said portions being injection-molded from plastic material and being kept in stock. The design configuration of the parts of the opening arrangement is rather complicated and expensive and the two portions are connected together by threads which are cast in place and one of which projects as a loop for opening the pack.
For opening the pack for the first time, the user applies pressure to the inner portion, whereby it rotates about a pivot point and the paper therebeneath tears through along perforation lines, with the inner portion turning about a horizontal axis.
The object of the invention is to provide a pack having an arrangement with the features of the kind set forth in the opening part of this specification, in such a way that, while being simple to manufacture and involving user-friendly handling when opening the pack, absolute sealing integrity of the pack until it is first opened is guaranteed and possibly aseptic conditions in respect of the interior of the pack can be better maintained until it is opened for the first time.
SUMMARY OF THE INVENTION
In accordance with the invention that object is attained in that a disk of plastic material is sealed on the top wall, in the center it has an opening for accommodating a rotary pin and at a spacing around said opening it has a slot which extends in a circular configuration over almost 360.degree. and which is interrupted by at least one br
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Shaver Kevin P.
Tetra Laval Holdings & Finance S.A.
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