Envelopes – wrappers – and paperboard boxes – Paperboard box – With closure for an access opening
Patent
1997-12-10
1999-07-27
Elkins, Gary E.
Envelopes, wrappers, and paperboard boxes
Paperboard box
With closure for an access opening
229214, 22912511, 531332, B65D 4316
Patent
active
059275944
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention concerns the packaging of liquid, granular or powdery products both alimentary and not.
In particular the present invention refers to a method for fastening a closure to a container for liquid, granular or powdery products, and the container so obtained, with said closure particularly suitable for sealing, since packaging, the pouring opening of the container and for saving the aroma of the packaged product after its first fruition from the container.
BACKGROUND ART
It is known that currently containers for liquid, or granular or powdery products are diffused, such as, for drinks or detergents, made by means of semi-stiff or flexible sheet material, suitably folded up and sealed.
Such containers, both with parallelepipedal and bag shape, are folded and closed by means of a first longitudinal welding forming the tubular and a transversal welding in correspondence to the opposite top and bottom edges in such a way that the top is almost flat or has two pitches sloping outside the semi-stiff container.
These containers are often provided with the so called "open and close" devices, fastened to the edges of the pouring opening carried out on the top of each container.
Open and close devices are known mainly including a cap screwable to a hub previously welded onto the edge of the pouring opening, or a so-called "hinged" cap consisting of a base glued to the container onto the borders of the pouring opening and a tongue, hinged and removably couplable to the base, fit to make a tight closure of the container. The more recent embodiments of these last devices include the sealing of the pouring opening with a removable or tearable strip of suitable water-repellent material that is glued upon the edges of the opening in such a way to make a kind of "manufacturer warranty" and "tightness" for the product packaged inside the container before its initial fruition. This strip lies between the container and the tongue of the "open and close" device.
The fastening of such closing devices often has problems because particular apparatuses were carried out so as to be inserted into the pre-existing packaging lines of such containers without "open and close" devices in this way true and real "bottle necks" have been introduced in correspondence with such apparatuses for fastening the "open and close" devices to the containers.
The "open and close" devices fastened to the borders of a pouring opening often comprise also the fastening of the "guarantee seal" tongue so introducing a further snag in the packaging line.
A further disadvantage is that such "open and close" devices are made of thermoplastic material and have relatively high cost in comparison with the container and the packaged product.
Further disadvantage of such closures is that most closures are fixed to containers of liquid, granular or powdery products that normally must be quickly consumed because they are "fresh" products such as milk and fruit juices. In fact, once one of such containers is open for the first fruition it is necessary to consume briefly the remaining packaged product even if the container closure is hermetic. This latter, therefore, must not necessary be hermetic because the "aroma-saving cap" function is the only effectively required function. It is therefore evident that the actual hermetic closures are disadvantageously extremely expensive for the simple functions to be worked out: to save the aroma of the product still packaged inside the container and to insulate temporarily the product from the external environment.
The document GB-A-2233315 discloses a cartoon container spout incorporated into the container and including a membrane, impermeable by the container's contents.
This membrane initially prevents the contents from escaping but is relatively readily penetrated by the end-user without the end-user having to penetrate the carton wall. The membrane is incorporated into the spout region of the container in such a way that, when pulled or penetrated, it parts company with the surrounding
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patent: 5725121 (1998-03-01), Gianpaolo
Catta 27 S.R.L.
Elkins Gary E.
Mai Iri
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