Dispensing – With flow controller or closure
Patent
1993-11-22
1995-03-28
Huson, Gregory L.
Dispensing
With flow controller or closure
383 69, 22912512, B65D 4700
Patent
active
054009294
DESCRIPTION:
BRIEF SUMMARY
OBJECT OF THE INVENTION
This invention consists of a slide-on seal or closure which has been specially designed so as to form a sealing device for different types of cardboard or laminated containers such as the cartons used for the marketing of milk, fruit juices, etc.
The slide-on seal described herein enables the container in question, which has been opened and the contents of which have been partially consumed, to be resealed hermetically in a simple, quick, effective way, pending further consumption of the contents.
BACKGROUND OF THE INVENTION
A large variety of liquid products such as those mentioned above and even some solid products are commercialized in plastic bags, hermetically sealed, which keep the contents protected from the surroundings. At other times, plastified cardboard containers are used such as the well-known "tetra-brik". Usually when this type of container is used, in order to consume the product, an oblique cut is made at the corner of the carton thus forming an opening through which the contents may be poured out. This opening usually measures between 1 and 2 cm. although in some cases it may measure more or less.
This type of container poses a two-fold problem. On the one hand, once the carton is opened, the contents run the risk of deteriorating and on the other hand, because of the flexible nature of the carton itself, there exists the likelihood of the contents being spilt while handling the carton.
DESCRIPTION OF THE INVENTION
The slide-on seal described herein has been conceived with a view to eliminating the above problems in an entirely satisfactory way. This sealing device has a simple structure, is easy to use, very effective and assures a water light seal for the carton, once opened, thus protecting the contents both from the deteriorating effect of the surroundings and from being spilt during use through careless handling of the carton.
In order to achieve this, the seal we propose is based on a tubular structure, preferably cylindrical (althugh it may adopt any other form) with a straight, longitudinal slit. The material used for the seal must be sufficiently elastic so as to allow the necessary pressure to be exerted on the sides of the carton which are introduced into the slit, in order to ensure that the opening is sealed all along the line defined by the said slit.
Tom complement this basic struture, the slit has been designed to end in a divergence at one of its extremities. This divergence acts as a guide, enabling the cut sides of the carton to enter the seal easily. Moreover, several reinforcements may be places around the perimeter of the seal in order to make the structure more rigid, thus preventing the appearance of any permanent deformations which would reduce the seal's usefulness and effectiveness.
DESCRIPTION OF THE DRAWINGS
As a complement to the description given and in order to enable a fuller understanding of the invention, we are attaching a set of drawings which form an integral part of this descriptive account. These drawings represent in an illustrative but not restrictive way the following:
FIG. 1. shows a perspective view of the slide-on seal constructed in accordance with the object of this invention.
FIG. 2. shows a cross-sectional view of the same device.
FIG. 3. shows a perspective view of the sealing device used to seal the opening in the corner of the type of carton that is used to commercialize milk, for example.
RECOMMENDED CONSTRUCTION OF THIS INVENTION
If we observe the drawings, it can be seen that the slide-on seal or closure is constructed from a tubular body (1) which in the practical example illustrated adopts a cylindrical form. However, it could just as easily adopt any other form such as, for example, a cuadrilateral prism, traingle, pentagon, hexagon, etc. and this would not effect the essence of the invention provided that the basic characteristics, which are essential to its functioning properly, are adhered to. These characteristics are: an appropriate radial elasticity and the existence of a straight longit
REFERENCES:
patent: 897594 (1908-09-01), Craw
patent: 3141221 (1964-07-01), Faulls, Jr.
patent: 5116139 (1992-05-01), Young et al.
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