FR2505293A1 - Package of two concentric tubes - has membrane across top of inner tube which is punctured by screwing in hood top to empty contents into mixing chamber - Google Patents

Abstract

The package receptacle is formed of a wide tube and a narrower one fitted concentrically inside. There is also a tube closure and the tubes are joined near the neck by an intermediate part with openings. The inner tube (2) has a membrane (7) blocking the outlet hole (6) before use. There is also a mixing chamber (3) carrying a piece (4) sliding axially. This is fitted on the neck (8) of the outer tube (1). The mixing chamber is closed by a screw-on cap (5) at the top of which is a control rod (9) and a second thread (10). The control can be used to perforate the membrane.

Description

 The present invention relates to a packaging container, consisting of a large tube and a smaller tube which is concentrically threaded therein, as well as a tube closure, the tubes being interconnected in the region of the neck through an intermediate part, with the formation of passage openings.

 Packaging containers of this type have long been in the art and are known, for example, from the United Kingdom of Great Britain and Ireland Patent No. 209,920, the United States patent No. 3,217,931 and the patent application published in the Federal Republic of Germany under No. 1,586,446. They are used when two different loads must be kept separate until use, but then be taken at the same time and in most cases be well mixed when taking. These central requirements create considerable problems for the conformation of the sampling opening. On the one hand, an absolutely reliable separation of the two charges must be obtained at least until the first use, on the other hand, impeccable mixing and, finally, it is necessary that the packaging container can be closed so that the two different loads continue to be essentially separated.

These requirements cannot be satisfied in all respects by the most sophisticated packaging containers known so far.

 It is therefore advisable to create a packaging container of the type mentioned above, in which two fillers to be mixed in use can be kept absolutely safe, at least until the first sample, while obtaining good mixing during sampling, and the possibility of reclosing keeping the two charges well separated.

 The packaging container according to the invention is characterized in that the inner tube has a membrane closing its outlet opening until the first use, in that a mixing chamber, with an axially sliding insert, is placed on the neck of the tube, and in that the mixing chamber is closed by a screw cap, which has, on its upper part, a central rod and a second thread, the insert being able to be displaced axially by the rod until to perforate the membrane by screwing the cap in the opposite direction to the position of use. In this respect, the insert is advantageously cylindrical and has a point facing the membrane and the helical passage channels. The inner tube is preferably made of aluminum or aluminum alloy, while the outer tube can be made of a material laminate.

 Thanks to the packaging container according to the invention, all requirements can be met in an impeccable manner. The membrane, provided for the inner tube, reliably prevents, until the first use, the overflow of the load in the other load chamber.

The mixing chamber with added part ensures an impeccable mixing of the two charges during the sampling and the screw cap allows, in a simple way, in connection with the added part, the perforation of the membrane closing the inner tube. The screw cap can be screwed into the normal use position and then closes the outlet opening of the mixing chamber. A better separation of the two loads is obtained after the first use by screwing the screw cap in the direction opposite to the position of use, the insert being introduced into the outlet opening of the inner tube and thus reducing to a minimum the cross section of exchange between the two chambers for loads. Other characteristics of the invention will appear during the description which follows of an exemplary embodiment shown in FIG. 1.

de passage. Le tube 2 intérieur possède une membrane,qui est d'une pièce avec lui et qui en ferme l'ouverture 6 de sortie.Figure 1 is a longitudinal sectional view of a packaging container according to the invention. The small inner tube 2 is threaded by its neck into the large outer tube 1 and is rigidly connected to the latter by an intermediate part 13 with the formation of openings

passing through. The inner tube 2 has a membrane, which is one piece with it and which closes the outlet opening 6.

On the neck 8 of the outer tube 1 is screwed a mixing chamber 3 which contains an attached part 4 which can slide axially and which is closed by a screw-on cap 5. The latter has, on its upper part, a central rod 9 and a second thread 10, so that it can be screwed in the opposite direction to the mixing chamber 3. The added piece 4 has a point 11 opposite the membrane 7 and has, on its cylindrical outer surface, helical passageways 12.

 When the packaging container is used for the first time, the cap 5 is screwed, as mentioned, to put it in the position opposite to that of use, the insert 4 being moved axially until it punctures the membrane. 7. Next, the cap 5 is removed and, by pressing on the packaging container, the load contained in the inner tube 2 and in the intermediate space between the inner tube 2 and the outer tube 1 is simultaneously released. The two charges mix in the mixing chamber 3, so that the desired mixed product is obtained at the outlet opening of this chamber.

Claims (4)

 1. Packaging container, consisting of a large tube and a smaller tube which is concentrically threaded therein, as well as a tube closure, the tubes being interconnected in the neck region by an intermediate part with formation of passage openings, characterized in that the inner tube (2) has a membrane (7) closing its outlet opening (6) until the first use, in that a mixing chamber (3) , with an axially sliding insert (4), is placed on the neck (8) of the tube (1), and in that the mixing chamber (3) is closed by a screw cap (5) which, on its upper part, a central rod (9) and a second thread (10), the insert being able to be moved axially by the rod (9) until it punctures the membrane (7) by screwing the cap (5) into the direction opposite to the position of use.  2. Packaging container according to claim 1, characterized in that the insert (4) is cylindrical and has a point (11) opposite the membrane (7) and helical passage channels (12).  3. Packaging container according to claim 1 or 2, characterized in that the inner tube (2) is made of aluminum or aluminum alloy.  4. Packaging container according to one of claims 1 to 3, characterized in that the outer tube (1) is made of a laminated material.