Container The present invention refers to a container, comprising a weakened area that permits an easy opening just applying a bending stress.

Background of the invention Several kinds of easy opening containers are well known in the art, including containers that are opened pressing on the container (WO2004039694 - VALOIS; EP1542612 - VOCO), containers that are opened pushing on a solid substrate inside the seal towards the seal (US20041 12769 - ACCANTIA; EP1021356 - Klocke), and container that have a cut that is extended by twisting (see US8069985 - Easypack).

These kinds of containers have several drawbacks.

The containers in which the opening is based on pressing on them or generating pressure inside the container by any means are quite hard to open, because the user has to compress the container and it can be damaged. In addition, the inner pressure is related with the chemical product contained, the level of filling, the atmospheric pressure when container was sealed. All these parameters affect robustness of the process of aperture of the container.

The containers in which the opening is base on pushing a substrate require having a solid substrate inside it.

The containers provided with a cut have problems regarding its barrier property and they are also hard to activate. Furthermore, the cut might be extended in such a way that the sealing assured on the border of the container is potentially lost.

Therefore, it is clear that there is a need for a container that can be opened easily and that does not have said drawbacks.

Description of the invention

With the container of the invention said drawbacks can be solved, presenting other advantages that will be described hereinafter.

The container of the present invention comprises a chamber closed by a flexible cover, and it is characterized in that said flexible cover defines a weakened area forming a seal between the chamber and the flexible cover, and in that the container comprises bending means for bending this weakened area so that the flexible cover separates from the chamber at the weakened area, opening said chamber.

According to a preferred embodiment, the container comprises two chambers, said weakened area joining said two chambers, so that when the weakened area is bent the flexible cover opens the communication between the chambers at the weakened area.

Preferably, the flexible cover comprises a barrier layer and this barrier layer is sealed at the weakened area.

According to a preferred embodiment, the thickness of the weakened area changes along its length, and the width of the weakened area changes along its length, so that the zone with a smaller thickness of the weakened area coincides with the zone with a smaller thickness of the weakened area.

Preferably, the flexible cover also comprises a cover layer, and there is access between one of said chambers and said cover layer, said access being a hole at said barrier layer.

Said cover layer is preferably made from a material with a high capillarity, and said cover layer is sealed to the barrier layer only at its perimeter.

According to a preferred embodiment, said bending means comprises a pair of flexible tabs placed at two opposed sides of the weakened area. Preferably, said flexible cover comprises side extensions corresponding with the flexible tabs.

According to a preferred embodiment, one of said chambers is an evaporation chamber and said cover layer is a semipermeable membrane.

The container of the present invention has the main advantage that it can be opened easily, just acting on the bending means.

Brief description of the drawings For a better comprehension of what has been disclosed, some drawings are attached in which, diagrammatically and only as a non-limitative example, a practical embodiment is shown.

Fig. 1 is an exploded perspective view of the container according to the present invention;

Fig. 2 is a plan view of the container according to the present invention;

Fig. 3 is a diagrammatical section view of the container according to the present invention wherein the communication between the two chambers is sealed; and

Fig. 4 is a diagrammatical section view of the container according to the present invention after opening the communication between the two chambers.

Description of a preferred embodiment

In the drawings an embodiment of the container according to the present invention is shown.

According to this embodiment, the container comprises two chambers 1 , 2 and a flexible cover 3 that closes said two chambers 1 , 2.

Even though the container of this embodiment comprises two chambers, it must be pointed out that the container of the present invention can also comprise just one chamber.

The flexible cover 3 defines a weakened area 4 between the chambers 1 , 2 and the flexible cover 3. This weakened area 4 is associated with bending means, which in the case of the embodiment shown is a pair of tabs 5. In this case, said flexible cover 3 comprises side extensions 9 corresponding with the flexible tabs 5.

According to a preferred embodiment, the thickness of the weakened area 4 changes along its length, and the width of the weakened area 4 changes along its length, so that the zone with a smaller thickness of the weakened area 4 coincides with the zone with a smaller thickness of the weakened area 4.

This tabs 5 are flexible and are placed at opposed sides of the weakened area 4, so that when the tabs 5 are pressed one to each other, the weakened area 4 flexes and the flexible cover 4 separates from the weakened area 4, so that the two chambers 1 , 2 are communicated to each other and, for example, two substances in the two chambers can be mixed together.

Figs. 3 and 4 show the sealing between the two chambers 1 , 2 before these tabs 5 are pressed and after pressing them, respectively.

Before the tabs 5 are pressed the communication between the chambers 1 , 2 is sealed. When the tabs 5 are pressed the seal is broken and the communication between the chambers 1 , 2 remains open.

In the case the container comprises just one chamber 1 , pressing the tabs 5 one to each other, the flexible cover 4 separates from the chamber 1 at the weakened are 4, opening the container directly outside. Preferably, the flexible cover 4 is welded on the periphery of the chamber or chambers 1 , 2, and the weakened area 4 is a zone in which the welding is narrower than in the rest of the periphery of the chamber or chambers. It is clear that the chambers can be shaped differently and that the gradient of the width of the welding can have different profiles, such as triangular or elliptical.

The flexible cover 4 can be made from a single layer or from several layers. According to the embodiment shown, the flexible cover 4 is made from two layers: a cover layer 7 and a barrier layer 6. If the cover layer 7 is a semipermeable membrane, one of the chambers 2 is an evaporation chamber, so that a volatile substance, such as a fragrance or insecticide formulation, will be emanated from the membrane. In this case, the container of the invention can be used in combination with a heater or a fan. Also in this case, the barrier layer 6 can be provided with a hole 8 at the second chamber 2, so that once the communication between the two chambers is opened, the hole 8 will provide a passage for the liquid from the chambers to the membrane o cover layer 7. Regarding the materials, the material of the chambers 1 , 2 is preferably in the range of thickness between 200 and 700 microns, preferably between 300 and 500 microns. The chambers 1 , 2 are made from a structural material that provides the mechanical features of the container, preferably PP or PET.

The flexible cover 3 that is in contact with the chamber or chambers is made from a material suitable to allow effective welding, preferably PE.

If a barrier layer 6 is used to increase the barrier features of the container, this barrier layer is preferably made from EVOH.

The cover layer 7 has a thickness between 20 and 200 microns, preferably between 50 and 80 microns. It is made from a material having a partial compatibility with the barrier layer 6 of the container.

For example, if the chamber or chambers are done from PE, the barrier layer 6 can made from PP, but it also it can be of PE mixed with a second plastic incompatible with PE, like polybutadiene.

Of course, the construction of the flexible cover 3 can be also made in the reverse way, having PE on the cover layer 7 and partially compatible material at the barrier layer 6 of the flexible cover. In this case, the barrier layer 6 that can be made preferably from aluminum. Alternatively, it could be a barrier layer 6 made from EVOH or PVDF.

Even though reference is made to a specific embodiment of the invention, it is clear for a person skilled in the art that the disclosed container is susceptible of variations and modifications, and that all the details cited can be substituted by other technically equivalent ones, without departing from the scope of protection defined by the attached claims.