RU2826127C2 - Capsule, system for preparing drinkable beverage from similar capsule and use of such capsule in beverage preparation device - Google Patents

Abstract

FIELD: beverage preparation devices.

SUBSTANCE: capsule contains substance for preparation of drink for drinking. Capsule comprises an aluminium capsule body having a side wall and a flange protruding outward and a sealing element on the outward protruding flange to provide sealing with respect to fluid medium contact with female element of beverage preparation device. Proposed device comprises ring element with free contact end provided with multiple radially extending open grooves. Capsule forms a support for a female element of a beverage preparation device, if the capsule is installed in a predetermined position in the enclosing element of the beverage preparation device and the enclosing member is closed by the closing member of the beverage preparation device, wherein said support covers at least part of the free contact end of the annular element.

EFFECT: capsule and system for beverage preparation are proposed.

26 cl, 10 dwg

Description

The invention relates to a capsule containing a substance for preparing a drinkable beverage by extracting and/or dissolving the substance by feeding a fluid under pressure into the capsule, wherein the capsule comprises an aluminum capsule body having a central axis of the capsule body, wherein said aluminum capsule body is formed with a bottom part, a side wall and an outwardly protruding flange, wherein the capsule further comprises an aluminum lid attached to the outwardly protruding flange, wherein the lid hermetically closes the capsule, wherein the capsule further comprises a sealing element on the outwardly protruding flange for providing a sealing contact with respect to the fluid with an enclosing element of a beverage preparation device, if the capsule is installed in a given position in the enclosing element of the beverage preparation device and the enclosing element is closed by means of a closing element of the beverage preparation device, such as an extraction plate of the beverage preparation device, so that the outwardly protruding flange of the capsule and at least a portion of the sealing element of the capsule are hermetically captured between the enclosing element and the closing element of the beverage preparation device, wherein In this case, the enclosing element of the beverage preparation device comprises an annular element having a central axis of the annular element and a free contact end, wherein said free contact end of the annular element is optionally made with a plurality of open grooves extending in the radial direction.

The invention also relates to a system for preparing a drinkable beverage from a capsule by using a fluid medium supplied under pressure into the capsule, comprising:

a beverage preparation device comprising a female element for receiving a capsule, wherein the female element comprises a fluid injection means for supplying a fluid under pressure into the capsule, wherein the beverage preparation device further comprises a closing element, such as an extraction plate, for closing the female element of the beverage preparation device, wherein the female element of the beverage preparation device further comprises an annular element having a central axis of the annular element and a free contact end, wherein said free contact end of the annular element is optionally provided with a plurality of open grooves extending in the radial direction;

a capsule containing a substance for preparing a drinkable beverage by extracting and/or dissolving the substance by means of a fluid supplied under pressure into the capsule by a means for pumping the fluid of a beverage preparation device, wherein the capsule comprises an aluminum capsule body having a central axis of the capsule body, wherein the said aluminum capsule body is formed with a bottom part, a side wall and an outwardly projecting flange, wherein the capsule further comprises an aluminum lid attached to the outwardly projecting flange, wherein the lid hermetically closes the capsule, wherein the capsule further comprises a sealing element on the outwardly projecting flange for providing a sealing contact with respect to the fluid with an enclosing element of the beverage preparation device, if the capsule is installed in a predetermined position in the enclosing element of the beverage preparation device and the enclosing element is closed by means of a closing element of the beverage preparation device, so that the outwardly projecting flange of the capsule and at least a portion of the sealing element of the capsule are hermetically captured between the enclosing element and the closing element of the device for preparation of drinks.

Furthermore, the invention relates to the use of a capsule in a beverage preparation device comprising a female element for receiving the capsule, wherein the female element comprises a fluid injection means intended for supplying a fluid under pressure into the capsule, wherein the beverage preparation device further comprises a closing element, such as an extraction plate, intended for closing the female element of the beverage preparation device, wherein the female element of the beverage preparation device further comprises an annular element having a central axis of the annular element and a free contact end, wherein said free contact end of the annular element is optionally provided with a plurality of open grooves extending in the radial direction; wherein the capsule comprises a substance for preparing a drinkable beverage by extracting and/or dissolving the substance by means of a fluid medium supplied under pressure into the capsule by a means intended for pumping the fluid medium of the beverage preparation device, wherein the capsule comprises an aluminum capsule body having a central axis of the capsule body, wherein the said aluminum capsule body is formed with a bottom part, a side wall and an outwardly protruding flange, wherein the capsule further comprises an aluminum lid attached to the outwardly protruding flange, wherein the lid hermetically closes the capsule, wherein the capsule further comprises a sealing element on the outwardly protruding flange for providing a sealing contact with respect to the fluid medium with the enclosing element of the beverage preparation device, if the capsule is installed in a given position in the enclosing element of the beverage preparation device and the enclosing element is closed by means of the closing element of the beverage preparation device, so that the outwardly protruding flange of the capsule and at least a part of the sealing element of the capsule are hermetically captured between the enclosing element and the closing element of the beverage preparation device.

A similar capsule, system and application are known from EP-B-1 700 548. In the known system, the capsule is made with a sealing element having the form of a step, i.e. with a sharp increase in the diameter of the side wall of the capsule, and the enclosing element of this known system has a sealing surface acting on the sealing element to ensure bending of the sealing element, wherein the sealing surface has such an inclination that the bending of the sealing element represents a deformation of the step in the inward and downward direction. In addition, in the known system, the enclosing element comprises a capsule holder and a manually or automatically controlled mechanism for shifting the enclosing element and the capsule holder relative to each other. The manually or automatically controlled mechanism ensures the application of force to the sealing element of the capsule when the enclosing element closes on the capsule holder. This force should ensure a hermetic seal between the enclosing element and the capsule. Since the manually or automatically controlled mechanism is movable relative to the base, the sealing capabilities of the system may depend on the pressure of the fluid pumped by the fluid pumping means. If the fluid pressure increases, the force between the capsule sealing element and the free end of the enclosing element also increases. Such a system is described below. The capsule sealing element must be designed such that when the maximum fluid pressure in the enclosing element is reached, the sealing element must still ensure a fluid-sealing contact between the enclosing element and the capsule. However, the sealing element must also be designed such that before cooking or at the beginning of cooking, when the fluid pressure in the enclosing element outside the capsule is relatively low, the sealing element also ensures a fluid-sealing contact between the enclosing element and the capsule. If at the beginning of cooking there is no fluid-sealing contact between the capsule and the enclosing element, a leak will occur. However, if a leak occurs, there is a real possibility that the pressure in the enclosing element and outside the capsule will not increase sufficiently to increase the force acting on the sealing element by means of the free end of the enclosing element, if a manually or automatically controlled mechanism ensures the movement of the enclosing element towards the capsule holder. Only if there is a sufficient initial seal, the pressure in the enclosing element will increase, as a result of which the force acting from the free end of the enclosing element on the sealing element of the capsule will also increase to ensure sufficient sealing contact with respect to the fluid, also at an increased pressure of the fluid. In addition, this increased pressure of the fluid outside the capsule also ensures an increased pressure of the fluid inside the capsule, which is essential if the capsule is provided with a lid that is designed to rupture on the relief elements of the capsule holder (also called the extraction plate) of the beverage preparation device under the action of the pressure of the fluid in the capsule.

It follows from the above that the sealing element is an element whose design is of great importance. It must be able to create a fluid-sealing contact between the enclosing element and the capsule at a relatively low fluid pressure if only a relatively small force is applied to the sealing element by means of the free end of the enclosing element, but it must also provide a fluid-sealing contact at a significantly higher fluid pressure in the enclosing element outside the capsule if a greater force is applied by means of the free end of the enclosing element to the capsule sealing element. In particular, when the free contact end of the enclosing element is provided with radially open grooves that serve as a channel for air inlet when the force between the enclosing element and the capsule holder ceases to act so that the user can more easily remove the capsule, the sealing element must also have the ability to "close" the radially open grooves to ensure effective sealing.

The object of the invention is to develop an alternative sealing element that is relatively easy to manufacture, that is environmentally friendly if the capsule is disposed of after use, and/or that provides sufficient sealing even in the case of a wrap-around element whose free contact end is made with radially open grooves.

The invention also aims to provide an alternative system for preparing a drinkable beverage from a capsule and to propose an alternative use of the capsule in a beverage preparation device.

According to the invention, according to a first aspect, a capsule is proposed that contains a substance for preparing a drinkable beverage by extracting and/or dissolving the substance by feeding a fluid under pressure into the capsule, wherein the capsule comprises an aluminum capsule body having a central axis of the capsule body, wherein said aluminum capsule body is formed with a bottom part, a side wall and an outwardly projecting flange, wherein the capsule further comprises an aluminum lid attached to the outwardly projecting flange, wherein the lid hermetically closes the capsule, wherein the capsule further comprises a sealing element on the outwardly projecting flange for providing a sealing contact with respect to the fluid with an enclosing element of the beverage preparation device, if the capsule is installed in a predetermined position in the enclosing element of the beverage preparation device and the enclosing element is closed by means of a closing element of the beverage preparation device, such as an extraction plate of the beverage preparation device, so that the outwardly projecting flange of the capsule and at least a portion of the sealing element of the capsule are hermetically captured between the enclosing element and a closing element of a beverage preparation device, wherein the enclosing element of the beverage preparation device comprises an annular element having a central axis of the annular element and a free contact end, wherein said free contact end of the annular element is optionally formed with a plurality of open grooves extending in the radial direction, characterized in that the capsule forms a support for the enclosing element of the beverage preparation device if the capsule is installed in a predetermined position in the enclosing element of the beverage preparation device and the enclosing element is closed by means of the closing element of the beverage preparation device, wherein said support encloses at least a portion of the free contact end of the annular element, wherein before use at least a first portion of the support is located at a first height above the cover, wherein in use, when closing the enclosing element by means of the closing element, the at least one first portion of the support is lowered by means of the free contact end of the annular element movable in the direction of the closing element, wherein the support is at least partially bent around the free contact end of the annular element so that after closing the enclosing element by means of the closing element the at least one first portion of the support is located at a second height above the cover, wherein the first height is greater than the second height, and the second height may be zero. Since the support embraces at least a portion of the free contact end of the annular element, if the capsule is installed in a given position in the enclosing element of the beverage preparation device and the enclosing element is closed by means of the closing element of the beverage preparation device, a sufficient seal can be ensured. Such a support can be comparatively simple to manufacture. In addition, the capsule can ensure a sufficient seal relative to the free contact end, which is made with open grooves extending in the radial direction. Since, when closing the enclosing element, the support at least partially bends around the free contact end of the annular element, excellent sealing contact interaction between the capsule and the enclosing element is achieved. In this application, the presence of a contact sealing with respect to the fluid means that 0-6%, preferably 0-4%, more preferably 0-2.5% of the total fluid supplied to the enclosing element for preparing a beverage may leak out due to leakage between the free contact end and the sealing element of the capsule.

The invention is particularly preferred when, in the embodiment of the capsule, the capsule is filled with 5-20 grams, preferably 5-10 grams, more preferably 5-7 grams of an extractable product, such as roasted and ground coffee.

In an embodiment of the capsule according to the invention, which is particularly easy to manufacture, the outer diameter of the outwardly projecting flange of the capsule is greater than the diameter of the lower part of the capsule. The outer diameter of the outwardly projecting flange is preferably approximately 37.1 mm, and the diameter of the lower part of the capsule is approximately 23.3 mm.

The invention is particularly preferred when, in the embodiment of the capsule, the thickness of the aluminum body of the capsule is 20-120 microns, preferably 100 microns.

The invention is particularly preferred when, in the embodiment of the capsule, the thickness of the aluminum cap is 15-65 microns, preferably 30-45 microns and, more preferably, 39 microns.

In one embodiment of the capsule according to the invention, the wall thickness of the aluminum cap is less than the wall thickness of the aluminum body of the capsule.

In a further embodiment of the capsule according to the invention, the aluminium lid is designed to rupture on a closing element of the beverage preparation device, such as an extraction plate of the beverage preparation device, under the action of the pressure of the fluid in the capsule.

In one embodiment of the capsule according to the invention, which is particularly easy to manufacture, the side wall of the aluminum body of the capsule has a free end opposite the lower part, wherein the outwardly projecting flange projects from said free end of the side wall in a direction at least substantially transverse to the central axis of the capsule body. The outwardly projecting flange preferably comprises a twisted outer edge, which is advantageous for ensuring a sufficient seal relative to the free contact end formed with open grooves extending in the radial direction. The radius of the inner edge of the twisted outer edge of the outwardly projecting flange relative to the central axis of the capsule body is preferably at least 32 mm, so that a gap from the annular end surface of the enclosing element is ensured. In this case, it is advantageous that the sealing element is located between the free end of the side wall of the aluminum body of the capsule and the inner edge of the twisted outer edge of the outwardly projecting flange in order to obtain an even more satisfactory seal.

To ensure that the rolled outer edge does not interfere with the operation of a wide variety of commercially available and future beverage preparation devices, the outwardly projecting flange has a largest dimension in radial cross-section of approximately 1.2 millimeters.

The invention is particularly advantageous for capsules in which the internal diameter of the free end of the side wall of the aluminum capsule body is approximately 29.5 mm. The distance between the free end of the side wall of the aluminum capsule body and the outermost edge of the flange projecting outwardly can be approximately 3.8 millimeters. The preferred height of the aluminum capsule body is approximately 28.4 mm.

In one embodiment of the capsule according to the invention, which is easier for the user to remove from the beverage preparation device after use, the aluminum body of the capsule is truncated, wherein the side wall of the aluminum body of the capsule preferably forms an angle with a line transverse to the central axis of the capsule body, amounting to approximately 97.5°.

In a preferred embodiment of the capsule according to the invention, the lower part of the aluminum body of the capsule has a largest internal diameter of approximately 23.3 mm. It is preferable that the lower part of the aluminum body of the capsule is truncated and preferably has a lower part height of approximately 4.0 mm, and that the lower part additionally has a substantially flat central part opposite the cover and having a diameter of approximately 8.3 mm.

In almost all cases, a sufficient seal can be obtained in an embodiment of the capsule according to the invention, in which the height of the part of the sealing element with which the free end of the enclosing element must first come into contact when the enclosing element is closed is at least approximately 0.1 mm, more preferably at least 0.2 mm and most preferably at least 0.8 mm and at most 3 mm, more preferably at most 2 mm and most preferably at most 1.2 mm.

In a preferred embodiment of the capsule according to the invention, the capsule comprises an inner surface, and wherein an inner coating is provided on the inner surface of at least the side wall of the capsule. In particular, when the capsule is produced by deep drawing, the inner coating facilitates the deep drawing process. In the case where the aluminum lid of the capsule is attached to the outwardly projecting flange by means of a sealing varnish, it is particularly advantageous if said inner coating consists of the same material as the sealing varnish. Depending on the inner coating used, it is advantageous for the sealing element to be free of the inner coating in order to prevent the inner coating from falling off the sealing element.

In a further embodiment of the capsule according to the invention, the capsule comprises an outer surface, wherein a coloured varnish is provided on the outer surface of the capsule. In order to facilitate deep drawing, it is preferable to provide an outer coating on the outer surface of the coloured varnish. Depending on the coloured varnish and outer coating used, it is preferable that the sealing element is free of coloured varnish (and therefore of the outer coating) in order to prevent the coloured varnish/outer coating from falling off the sealing element.

In an embodiment of the capsule according to the invention, which is easy to manufacture, the support, which covers at least part of the free contact end of the annular element, is at least partially formed by a sealing element.

In this case, the capsule sealing element preferably comprises two spaced apart projections, each of which projects from the outwardly projecting flange, and a flat portion between these two projections, so that this at least one first portion of the flat portion defines a predetermined depth of the space between the two projections, wherein the radial distance between the two projections is such that the free contact end of the annular element is embraced by these two projections if the capsule is installed in a predetermined position in the enclosing element of the beverage preparation device and the enclosing element is closed by means of the closing element of the beverage preparation device, and wherein before use this at least one first portion of the flat portion is located at a first height above the cover, so that this space has a first depth, wherein in use, when closing the enclosing element by means of the closing element, this at least one first portion of the flat portion is lowered by means of the free contact end of the annular element, movable in the direction of the closing element, so that the flat portion at least partially bends around the free contact end, wherein after closing the enclosing element by means of the closing element this at least one first portion the flat part is located at a second height above the cover, wherein the first height is greater than the second height, and the second height may be zero, and so that this space has a second depth relative to this at least one first part, which is greater than the first depth. Since, when closing the enclosing element, the flat part is at least partially folded around the free contact end of the annular element, an excellent sealing contact interaction between the capsule and the enclosing element is ensured. In addition, the fact that the depth of said space increases so that a comparatively large part of the annular element is located in this space improves the sealing contact interaction between the capsule and the enclosing element.

It is also preferable if the distance between these two projections is such that these two projections come into contact with the free contact end of the annular element if the capsule is installed in a given position in the enclosing element of the beverage preparation device and the enclosing element is closed by means of the closing element of the beverage preparation device. The two spaced projections and the flat part can be designed so that the flat part comes into contact with the free contact end of the annular element if the capsule is installed in a given position in the enclosing element of the beverage preparation device and the enclosing element is closed by means of the closing element of the beverage preparation device.

In an alternative embodiment, the capsule sealing element comprises a protrusion protruding from the outwardly protruding flange and a flat portion between the protrusion and the side wall of the aluminum capsule body, wherein the support is formed by the protrusion, the flat portion and the side wall of the aluminum capsule body, wherein the distance between the protrusion and the side wall is such that the free contact end of the annular element is embraced by the protrusion and the side wall of the aluminum capsule body if the capsule is installed in a predetermined position in the enclosing element of the beverage preparation device and the enclosing element is closed by means of the closing element of the beverage preparation device, wherein before use at least one first portion of the flat portion is located at a first height above the cover, wherein in use, when closing the enclosing element by means of the closing element, this at least one first portion of the flat portion is lowered by means of the free contact end of the annular element movable in the direction of the closing element, so that the flat portion at least partially bends around the free contact end, wherein after closing the enclosing element by means of the closing element, this at least at least one first part of the flat part is located at a second height above the cover, wherein the first height is greater than the second height, and the second height may be zero. Since, when closing the enclosing element, the flat part is at least partially bent around the free contact end of the ring element, excellent sealing contact interaction between the capsule and the enclosing element is ensured.

The distance between the projection and the side wall of the aluminum body of the capsule may be such that the projection and the side wall of the aluminum body of the capsule come into contact with the free contact end of the annular element if the capsule is installed in a given position in the enclosing element of the beverage preparation device and the enclosing element is closed by means of the closing element of the beverage preparation device. In this case, the projection, the side wall of the aluminum body of the capsule and the flat part are preferably designed such that the flat part comes into contact with the free contact end of the annular element if the capsule is installed in a given position in the enclosing element of the beverage preparation device and the enclosing element is closed by means of the closing element of the beverage preparation device.

In a further embodiment of the capsule according to the invention, in which the sealing can be further improved, at least one projection comprises an upper portion of the projection, and wherein this at least one projection has such a configuration that the upper portion of the projection ensures the application of a radial force to the free contact end of the ring element, if the capsule is installed in a given position in the enclosing element of the beverage preparation device and the enclosing element is closed by means of the closing element of the beverage preparation device. In particular, when the flat portion is substantially flat and has an inclination relative to the outwardly projecting flange of the aluminum body of the capsule, the applied force ensures an additional sealing effect.

In yet another additional embodiment of the capsule according to the invention, at least one protrusion comprises a side wall of the protrusion, which has an inclination relative to the outwardly protruding flange of the aluminum body of the capsule.

The flat portion is substantially flat or may comprise a curved portion, preferably adapted to the shape of the free contact end of the annular element.

According to the invention, according to a second aspect, a system is proposed for preparing a drinkable beverage from a capsule by using a fluid medium supplied under pressure into the capsule, comprising:

a beverage preparation device comprising a female element for receiving a capsule, wherein the female element comprises a fluid injection means for supplying a fluid under pressure into the capsule, wherein the beverage preparation device further comprises a closing element, such as an extraction plate, for closing the female element of the beverage preparation device, wherein the female element of the beverage preparation device further comprises an annular element having a central axis of the annular element and a free contact end, wherein said free contact end of the annular element is optionally provided with a plurality of open grooves extending in the radial direction;

a capsule containing a substance for preparing a drinkable beverage by extracting and/or dissolving the substance by means of a fluid supplied under pressure into the capsule by a means for pumping the fluid of a beverage preparation device, wherein the capsule comprises an aluminum capsule body having a central axis of the capsule body, wherein the said aluminum capsule body is formed with a bottom part, a side wall and an outwardly projecting flange, wherein the capsule further comprises an aluminum lid attached to the outwardly projecting flange, wherein the lid hermetically closes the capsule, wherein the capsule further comprises a sealing element on the outwardly projecting flange for providing a sealing contact with respect to the fluid with an enclosing element of the beverage preparation device, if the capsule is installed in a predetermined position in the enclosing element of the beverage preparation device and the enclosing element is closed by means of a closing element of the beverage preparation device, so that the outwardly projecting flange of the capsule and at least a portion of the sealing element of the capsule are hermetically captured between the enclosing element and the closing element of the device for beverage preparation, characterized in that the capsule forms a support for the enclosing element of the beverage preparation device, if the capsule is installed in a predetermined position in the enclosing element of the beverage preparation device and the enclosing element is closed by means of the closing element of the beverage preparation device, wherein said support embraces at least a part of the free contact end of the annular element. Since the support embraces at least a part of the free contact end of the annular element, if the capsule is installed in a predetermined position in the enclosing element of the beverage preparation device and the enclosing element is closed by means of the closing element of the beverage preparation device, a sufficient seal can be ensured. Such a support can be relatively simple to manufacture. Furthermore, in such a system, the capsule ensures a sufficient seal relative to the free contact end, made with open grooves extending in the radial direction.

With regard to preferred embodiments of the system, given in dependent claims of the invention, which relate to the same features as the features of dependent claims of the invention relating to the capsule, reference should be made to the above.

The invention is particularly suitable in a system according to the invention in which, in use, the maximum fluid pressure in the enclosing element of the beverage preparation device is in the range of 6-20 bar, preferably between 12 and 18 bar. Even at such high pressures, a sufficient seal between the capsule and the beverage preparation device can be ensured.

The system is preferably designed so that when used during brewing, the free end of the enclosing element of the beverage preparation device provides the application of a force F2 to the sealing element of the capsule to ensure a sealing contact with respect to the fluid medium between the outwardly protruding flange of the capsule and the enclosing element of the beverage preparation device, wherein F2 is in the range of 500-1500 N, preferably in the range of 750-1250 N, when the pressure P2 of the fluid in the enclosing element of the beverage preparation device outside the capsule is in the range of 6-20 bar, preferably between 12 and 18 bar. In particular, the system is designed so that when used before brewing or at the start of brewing, the free end of the enclosing element of the beverage preparation device provides the application of a force F1 to the sealing element of the capsule to provide a sealing contact with respect to the fluid medium between the outwardly protruding flange of the capsule and the enclosing element of the beverage preparation device, wherein F1 is in the range of 30-150 N, preferably in the range of 40-150 N, more preferably 50-100 N, when the pressure P1 of the fluid in the enclosing element of the beverage preparation device outside the capsule is in the range of 0.1-4 bar, preferably 0.1-1 bar.

In an embodiment of the system according to the invention, a plurality of radially extending, open grooves are uniformly distributed relative to each other in the circumferential in the direction of the free contact end of the annular element of the beverage preparation device, so that the user can more easily remove the capsule, while still being able to ensure a sufficient seal between the capsule and the beverage preparation device.

In a preferred embodiment of the system according to the invention, the greatest width of each groove in the circumferential direction (from top to top, i.e. equal to the pitch between the grooves) is 0.9-1.1 mm, preferably 0.95-1.05 mm, more preferably 0.98-1.02 mm, while the maximum height of each groove in the axial direction of the enclosing element of the beverage preparation device is 0.01-0.09 mm, preferably 0.03-0.07 mm, more preferably 0.045-0.055 mm, most preferably 0.05 mm, and the number of grooves is 90-110, preferably 96. The width of the annular end surface in the radial direction at the location of the grooves can be, for example, 0.05-0.9 mm, preferably 0.2-0.7 mm and more preferably 0.3-0.55 mm.

The invention is particularly suitable for use in an embodiment of the system according to the invention, in which, during use, when the closing element of the beverage preparation device closes the enclosing element of the beverage preparation device, at least the free contact end of the enclosing element of the beverage preparation device can move relative to the closing element of the beverage preparation device under the action of the fluid pressure in the enclosing element of the beverage preparation device towards the closing element of the beverage preparation device to apply a maximum force between the flange of the capsule and the free end of the enclosing element of the beverage preparation device. The enclosing element can comprise a first component and a second component, wherein the second component comprises a free contact end of the enclosing element, wherein the second component can move relative to the first component between a first and a second position. The second component can move from the first position to the second position in the direction of the closing element under the action of the fluid pressure in the enclosing element. The force F1 discussed above can be achieved if the second component is in the first position at a fluid pressure P1. The force F2 discussed above can be achieved if the second component is moved towards the second position under the action of the pressure P2 of the fluid in the enclosing element.

According to the invention, according to a third aspect, there is proposed the use of a capsule according to the invention in a device for preparing beverages, comprising a female element for receiving a capsule, wherein the female element comprises a fluid injection means intended for feeding a fluid under pressure into the capsule, wherein the device for preparing beverages further comprises a closing element, such as an extraction plate, intended for closing the female element of the device for preparing beverages, wherein the female element of the device for preparing beverages further comprises an annular element having a central axis of the annular element and a free contact end, wherein said free contact end of the annular element is optionally made with a plurality of radial grooves; wherein the capsule comprises a substance for preparing a drinkable beverage by extracting and/or dissolving the substance by means of a fluid medium supplied under pressure into the capsule by a means intended for pumping the fluid medium of the beverage preparation device, wherein the capsule comprises an aluminum capsule body having a central axis of the capsule body, wherein the said aluminum capsule body is formed with a bottom part, a side wall and an outwardly protruding flange, wherein the capsule further comprises an aluminum lid attached to the outwardly protruding flange, wherein the lid hermetically closes the capsule, wherein the capsule further comprises a sealing element on the outwardly protruding flange for providing a sealing contact with respect to the fluid medium with the enclosing element of the beverage preparation device, if the capsule is installed in a given position in the enclosing element of the beverage preparation device and the enclosing element is closed by means of the closing element of the beverage preparation device, so that the outwardly protruding flange of the capsule and at least a part of the sealing element of the capsule are hermetically captured between the enclosing element and the closing element of the beverage preparation device. With regard to the advantage of the use according to the invention and the preferred embodiments of the use mentioned in the dependent claims, which relate to the same features as the features of the dependent claims relating to the capsule or the dependent claims relating to the system, reference should be made to the above.

The invention will now be further explained by means of non-limiting examples with reference to the drawings, in which

Fig. 1 shows a schematic representation of an embodiment of the system according to the invention;

Fig. 2 shows a perspective view of an embodiment of a device for preparing beverages of the system according to the invention, wherein the free contact end of the enclosing element of the device for preparing beverages with a plurality of open grooves extending in the radial direction is shown;

Fig. 3A shows in section an embodiment of the capsule according to the invention before use;

Fig. 3B shows an enlarged fragment of the capsule of Fig. 3A, showing the outwardly protruding flange and the sealing element;

Fig. 3C shows an enlarged fragment of the outwardly protruding flange of the capsule of Figs. 3A and 3B after use;

Fig. 4A shows a first embodiment of a sealing element on an outwardly protruding flange of a capsule according to the invention;

Fig. 4B shows a second embodiment of a sealing element on an outwardly protruding flange of a capsule according to the invention;

Fig. 4C shows a third embodiment of a sealing element on an outwardly protruding flange of a capsule according to the invention;

Fig. 4D shows a fourth embodiment of a sealing element on an outwardly protruding flange of a capsule according to the invention; and

Fig. 4E shows a fifth embodiment of a sealing element on an outwardly protruding flange of a capsule according to the invention.

In the figures and in the following description, like reference numerals refer to like elements.

Fig. 1 shows a schematic cross-sectional view of an embodiment of a system 1 for preparing a drinkable beverage from a capsule by using a fluid supplied under pressure into the capsule. The system 1 comprises a capsule 2 and a beverage preparation device 4. The device 4 comprises a covering element 6 for holding the capsule 2. The device 4 further comprises a closing element 8, such as an extraction plate, for providing support for the capsule 2.

In Fig. 1, for the sake of clarity, a gap is shown between the capsule 2, the enclosing element 6 and the extraction plate 8. It should be understood that, in use, the capsule 2 may be in contact with the enclosing element 6 and the extraction plate element 8. Typically, the enclosing element 6 has a shape complementary to the shape of the capsule 2. The device 4 further comprises a fluid injection means 10 intended for feeding a quantity of a fluid, such as water, under a pressure in the range of 6-20 bar, preferably between 12 and 18 bar, into the replaceable capsule 2.

In the example shown in Fig. 1, the replaceable capsule 2 comprises an aluminum capsule body 12 having a central axis 12A of the capsule body, and an aluminum cover 14. In this context, the meaning of the term "aluminum" is understood as also covering an aluminum alloy. In this example, the aluminum capsule body 12 comprises a side wall 16, a lower part 18 covering the side wall 16 at a first end, and an outwardly projecting flange 20 projecting outwardly from the circumferential wall 16 at a second end opposite the lower part 18. The side wall 16, the lower part 18 and the cover 14 enclose an internal space 22 containing a substance for preparing a drinkable beverage by extracting and/or dissolving the substance. The substance is preferably 5-20 grams, preferably 5-10 grams, more preferably 5-7 grams of roasted and ground coffee for preparing one serving of the beverage. The capsule is initially sealed, i.e. hermetically sealed before use.

The system 1 according to Fig. 1 comprises means 24 for piercing the lower part, intended for piercing the lower part 18 of the capsule 2 to create at least one inlet opening 25 in the lower part 18 for feeding a fluid medium into the product to be extracted through the inlet opening 25.

The system 1 according to Fig. 1 additionally comprises means 26 for piercing the lid, made in this case in the form of projections of the closing element 8 for piercing the lid 14 of the capsule 2. The means 26 for piercing the lid can be made with the possibility of breaking the lid 14 as soon as the pressure (of the fluid) in the internal space 22 exceeds the threshold pressure and ensures that the lid 14 is pressed against the means 26 for piercing the lid with sufficient force. Thus, the aluminum lid 14 is made with the possibility of breaking on the closing element 8 of the beverage preparation device under the action of the pressure of the fluid in the capsule.

The capsule 2 further comprises a sealing element 28, shown in Fig. 1, 3A and 3B as a conventional frame, but described in more detail in connection with Fig. 4A-4E, wherein said sealing element 28 is provided on the outwardly projecting flange 20 to ensure a sealing contact with the enclosing element 6 with respect to the fluid, if the capsule 2 is mounted in a given position in the enclosing element 6 and the enclosing element 6 is closed by means of the extraction plate 8, so that the outwardly projecting flange 20 of the capsule 2 and at least a part of the sealing element 28 are hermetically captured between the enclosing element 6 and the extraction plate 8. This means that a sealing contact with respect to the fluid is created between the sealing element and the free contact end.

As shown in Fig. 2, the enclosing member 6 of the beverage preparation device comprises an annular member 41 having a central axis 41A of the annular member and a free contact end 30. The free contact end 30 of the annular member 41 is provided with a plurality of radially extending, open grooves 40. The plurality of radially extending, open grooves 40 are uniformly distributed relative to each other in the circumferential direction of the free contact end 30 of the annular member 41. The greatest width of each groove 40 in the circumferential direction is 0.9-1.1 mm, preferably 0.95-1.05 mm, more preferably 0.98-1.02 mm, while the maximum height of each groove 40 in the axial direction of the enclosing member 6 is 0.01-0.09 mm, preferably 0.03-0.07 mm, more preferably 0.045-0.055 mm and, most preferably 0.05 mm. The number of grooves 40 is in the range of 90-110, preferably 96. The width of the free end in the radial direction at the location of the grooves is usually 0.05-0.9 mm, more specifically 0.2-0.7 mm, more specifically 0.3-0.55 mm.

An embodiment of the capsule according to the invention is shown in more detail in Fig. 3A and 3B. In the embodiment shown, the outer diameter ODF of the outwardly projecting flange 20 exceeds the diameter DB of the lower part 18 of the capsule 2. In the embodiment shown, the outer diameter ODF of the outwardly projecting flange 20 is approximately 37.1 mm, and the diameter DB of the lower part 18 is approximately 23.3 mm. The thickness of the aluminum body 12 of the capsule is 100 microns, but in other embodiments the thickness may be 20-120 microns.

In the embodiment shown, the wall thickness of the aluminum lid 14 is 39 microns. The wall thickness of the aluminum lid 14 is preferably less than the thickness of the aluminum body 12 of the capsule.

The side wall 16 of the aluminum housing 12 of the capsule has a free end 42 opposite the lower part 18. The internal diameter IDF of the free end 42 of the side wall 16 of the aluminum housing 12 of the capsule is approximately 29.5 mm. An outwardly projecting flange 20 projects from this free end 42 in a direction at least substantially transverse to the central axis 12A of the capsule housing. The outwardly projecting flange 20 comprises a twisted outer edge 43, which is preferable for providing a seal between the capsule and the enclosing element. In the illustrated embodiment, the twisted outer edge 43 of the outwardly projecting flange 20 has a largest dimension of approximately 1.2 millimeters. The distance DIF between the free end 42 of the side wall 16 of the aluminum housing 12 of the capsule and the inner edge 43A of the twisted outer edge 43 is approximately 2.7 mm, while the distance DOF between the free end 42 of the side wall 16 of the aluminum housing 12 of the capsule and the outermost edge 43B of the outwardly protruding flange 20 is approximately 3.8 millimeters. The radius of the inner edge 43A of the twisted outer edge 43 relative to the central axis of the capsule housing is preferably at least 32 mm.

As shown in Fig. 3A and 3B, the sealing element 28 is located between the free end of the side wall 16 of the aluminum body 12 of the capsule and the inner edge 43A of the twisted outer edge 43 of the outwardly protruding flange. The sealing element 28 is shown as a conventional frame, but will be described in more detail below. Regardless of the embodiment of the sealing element 28, the height of the part of the sealing element with which the free end of the enclosing element must first come into contact when the enclosing element is closed is at least approximately 0.1 mm, more preferably at least 0.2 mm and most preferably at least 0.8 mm and at most 3 mm, more preferably at most 2 mm and most preferably at most 1.2 mm to ensure proper sealing.

As can be seen from Fig. 3A, the aluminum capsule body 12 is truncated. In the embodiment shown, the side wall 16 of the aluminum capsule body 12 forms an angle A with a line transverse to the central axis 12A of the capsule body, which is approximately 97.5°. The lower part 18 of the aluminum capsule body 12 has a largest internal diameter DB, which is approximately 23.3 mm. The lower part 18 of the aluminum capsule body 12 is also truncated and in the embodiment shown has a height BH of the lower part, which is approximately 4.0 mm. The lower part 18 further has a substantially flat central part 18A opposite the cover 14, wherein said central part 18A has a diameter DEE of approximately 8.3 mm, and in said central part 18A an inlet(s) opening(s) 25 may be formed. The inlet openings may also be formed in the truncated part between the central part 18A and the side wall 16. The total height TH of the aluminum body 12 of the capsule is approximately 28.4 mm.

The system 1 shown in Fig. 1 functions as follows to prepare a cup of drinkable beverage, in the example shown - coffee, wherein the substance is roasted and ground coffee.

The capsule 2 is placed in the enclosing element 6. The extraction plate 8 is brought into contact with the capsule 2. The means 24 for piercing the lower part pierce the lower part 18 of the capsule 2 to form inlet openings 25. The fluid, in this case hot water under pressure, is supplied to the product to be extracted, located in the internal space 22, through the inlet openings 25. The water will wet the ground coffee and extract the desired substances to form a coffee beverage.

During the supply of water under pressure into the internal space 22, the pressure inside the capsule 2 will increase. The increase in pressure will cause the deformation of the lid 14 and its pressing against the lid-piercing means 26 of the extraction plate. As soon as the pressure reaches a certain level, the tensile strength of the lid 14 will be overcome and the lid 14 will break at the lid-piercing means 26, which will lead to the formation of outlet holes. The prepared coffee will flow out of the capsule 2 through the outlet holes and discharge channels 32 (see Fig. 1) of the extraction plate 8 and can be supplied to a container, such as a cup (not shown).

The system 1 is designed in such a way that before brewing or at the beginning of brewing, the free end 30 of the enclosing element 6 ensures the application of a force F1 to the sealing element 28 of the capsule 2 to ensure a sealing contact with respect to the fluid medium between the outwardly protruding flange 20 of the capsule 2 and the enclosing element 6 of the beverage preparation device, wherein F1 is in the range of 30-150 N, preferably 40-150 N, more preferably 50-100 N, when the pressure P1 of the fluid medium in the enclosing element of the beverage preparation device outside the capsule is in the range of 0.1-4 bar, preferably 0.1-1 bar. During brewing, the free end 30 of the enclosing element 6 ensures the application of a force F2 to the sealing element 28 of the capsule 2 to ensure a sealing contact with respect to the fluid medium between the outwardly protruding flange 20 of the capsule 2 and the enclosing element 6, wherein the force F2 is in the range of 500-1500 N, preferably in the range of 750-1250 N, when the pressure P2 of the fluid medium in the enclosing element 6 of the beverage preparation device outside the capsule 2 is in the range of 6-20 bar, preferably between 12 and 18 bar. In the embodiment shown, the free contact end of the enclosing element 6 can move relative to the extraction plate 8 under the action of the pressure of the fluid in the enclosing element 6 of the device to the extraction plate 8 to apply a maximum force F2 between the outwardly projecting flange 20 and the free end 30 of the enclosing element 6. This movement can occur during use, that is, in particular, at the beginning of cooking and during cooking. The enclosing element 6 has a first component 6A and a second component 6B, wherein the second component comprises a free contact end 30. The second component 6B can move relative to the first component 6A between a first and a second position. The second component 6B can move from the first position to the second position in the direction of the closing element 8 under the action of the pressure of the fluid in the enclosing element 6. The force F1 discussed above can be achieved if the second component 6B is in the first position at a pressure P1 of the fluid. The force F2 discussed above can be achieved if the second component 6B is moved towards the second position under the action of the pressure P2 of the fluid in the enclosing element 6.

As a result of the application of force, the sealing element 28 of the capsule according to the invention is subjected to plastic deformation and takes a shape close to the shape of the grooves 40 of the free contact end 30, and, therefore, ensures a fluid-sealing contact between the enclosing element 6 and the capsule 2 at a comparatively low fluid pressure during the start of cooking, but also ensures a fluid-sealing contact at a significantly higher fluid pressure in the enclosing element outside the capsule during cooking. This close correspondence in shape to the grooves 40 of the enclosing element is shown in Fig. 3C, which shows the capsule 2 according to the invention after use, and which clearly shows that the outwardly projecting flange 20 comprises deformed parts 40', which correspond in shape to the grooves 40 of the enclosing element.

In the following, illustrative embodiments of the sealing element 28 on the outwardly protruding flange 20 of the capsule 2 according to the invention will be described in more detail in connection with Figs. 4A-4E.

Fig. 4A shows a first embodiment of a sealing element 28 forming a support on an outwardly projecting flange 20 of a capsule 2 according to the invention. The sealing element 28 comprises two spaced projections 50 and 51, each of which projects from the outwardly projecting flange 20. A flat part 52 is provided between the two projections 50 and 51. The distance between the two projections 50 and 51 is such that the free contact end of the annular element 41 is embraced by the two projections 50 and 51 if the capsule is installed in a given position in the enclosing element of the beverage preparation device and the enclosing element is closed by means of the closing element of the beverage preparation device. In the embodiment shown in Fig. 4A, the flat part is located at a certain distance above the part of the outwardly projecting flange 20 between the sealing element 28 and the curled edge 43 and is substantially flat. In addition, the distance between the two projections 50 and 51 (for example, 0.9-1.25 mm) is such that the two projections 50 and 51 come into contact with the free contact end of the annular element, if the capsule is installed in a given position in the enclosing element of the beverage preparation device and the enclosing element is closed by means of the closing element of the beverage preparation device. Furthermore, the two spaced apart projections 50, 51 and the flat part 52 are designed so that the flat part comes into contact with the free contact end of the annular element, if the capsule is installed in a given position in the enclosing element of the beverage preparation device and the enclosing element is closed by means of the closing element of the beverage preparation device. At least one first part of the flat part (in this example, the entire flat part) defines a given depth of space between the two projections. As can be seen in Fig. 4A, each projection 50, 51 comprises a side wall of the projection, which has an inclination relative to the outwardly protruding flange 20 of the aluminum body of the capsule. This therefore indicates that the sealing element comprises two spaced projections 50, 51, each of which projects from the outwardly projecting flange 20, and a flat portion 52 between these two projections, so that at least one first portion of the flat portion (in this example, the entire flat portion) defines a given depth of space between these two projections. The radial distance between the two projections is such that the free contact end of the annular element is embraced by these two projections, if the capsule is installed in a given position in the enclosing element of the beverage preparation device and the enclosing element is closed by means of the closing element of the beverage preparation device. Before use (see Fig. 4A), this at least one first part of the flat part (in this example, the entire flat part) is located at a first height above the cover so that this space has a first depth, wherein in use, when closing the enclosing element by means of the closing element, the at least one first part of the flat part is lowered by means of the free contact end of the ring element, moved towards the closing element, so that the flat part is at least partially folded around the free contact end, wherein after closing the enclosing element by means of the closing element, this at least one first part of the flat part is located at a second height above the cover (reference position 52'), wherein the first height is greater than the second height, and the second height may be zero, and wherein this space has a second depth relative to this at least one first part, which is greater than the first depth.

Fig. 4B shows a second embodiment of the sealing element 28 on the outwardly projecting flange 20 of the capsule according to the invention. When compared with Fig. 4A, the following differences are noted. Each projection 50, 51 in this case has a side wall of the projection, which is transverse with respect to the outwardly projecting flange 20 of the aluminum body of the capsule. Furthermore, in this second embodiment, the flat part 52 is curved and preferably corresponds in shape to the shape of the free contact end of the ring element 41. Therefore, this indicates that the sealing element has two spaced projections 50, 51, each of which projects from the outwardly projecting flange 20, and a flat part 52 between these two projections, so that at least one first part of the flat part (in this example the middle of the flat part) defines a predetermined depth of space between these two projections. The radial distance between these two projections is such that the free contact end of the annular element is covered by these two projections if the capsule is installed in a given position in the enclosing element of the beverage preparation device and the enclosing element is closed by means of the closing element of the beverage preparation device. Before use (see Fig. 4B), this at least one first part of the flat part (in this example, the middle of the flat part) is located at a first height above the cover so that this space has a first depth, wherein in use, when closing the enclosing element by means of the closing element, the at least one first part of the flat part is lowered by means of the free contact end of the ring element, moved towards the closing element, so that the flat part is at least partially folded around the free contact end, wherein after closing the enclosing element by means of the closing element, this at least one first part of the flat part is located at a second height above the cover, wherein the first height is greater than the second height, and the second height can be zero, and wherein this space has a second depth relative to this at least one first part, which is greater than the first depth. Fig. 4C shows a third embodiment of the sealing element 28 on the outwardly protruding flange 20 of the capsule according to the invention, which together with the side wall 16 of the aluminum body of the capsule forms a support for the enclosing element. The shown sealing element 28 comprises a projection 53 projecting from the outwardly projecting flange 20, and an inclined, substantially flat, flat portion 52 between the upper portion of the projection 53 and the side wall 16 of the aluminum capsule body. In this embodiment, the support is formed by the projection 53, the flat portion 52 and the side wall 16 of the aluminum capsule body. The distance between the upper portion of the projection 53 and the side wall 16 is such that the free contact end of the annular element 41 is enclosed by the projection 53 and the side wall 16 of the aluminum body of the capsule, if the capsule is installed in a given position in the enclosing element of the beverage preparation device and the enclosing element is closed by means of the closing element of the beverage preparation device. In particular, the distance between the projection 53 and the side wall 16 of the aluminum body of the capsule is such that the projection 53 and the side wall 16 and, in the illustrated embodiment, also the flat part 52 of the aluminum body of the capsule come into contact with the free contact end of the annular element 41, if the capsule is installed in a given position in the enclosing element of the beverage preparation device and the enclosing element is closed by means of the closing element of the beverage preparation device. This distance can be, for example, 0.9-1.25 mm. This therefore indicates that, before use (see Fig. 4C), at least one first part of the flat part (in this example, at least a section in the middle of the flat part) is located at a first height above the cover. When used when closing the enclosing element by means of the closing element, this at least one first part of the sloping part is lowered by means of the free contact end of the ring element, moving towards the closing element, so that the sloping part is at least partially bent around the free contact end. After closing the enclosing element by means of the closing element, this at least one first part of the sloping part is located at a second height above the cover, wherein the first height is greater than the second height, and the second height can be zero.

Fig. 4D shows a fourth embodiment of the sealing element 28 on the outwardly projecting flange 20 of the capsule according to the invention, which together with the side wall 16 of the aluminum body of the capsule forms a support for the enclosing element. When compared with Fig. 4C, the following differences are noted. In this fourth embodiment, the flat part 52 is curved and comprises a curved part (which actually forms part of the inner side wall of the projection 53), as well as a flat part, which is located at the same level as the part of the outwardly projecting flange 20 between the projection 53 and the curved edge 43. The curved part preferably corresponds in shape to the shape of the free contact end of the ring element 41. This therefore indicates that before use (see Fig. 4D), at least one first part of the flat part (in this example, at least part of the inner side wall of the projection 53) is located at a first height above the cover. When used when closing the enclosing element by means of the closing element, this at least one first part of the sloping part is lowered by means of the free contact end of the ring element, which is moved towards the closing element, so that the sloping part is at least partially bent around the free contact end. After closing the enclosing element by means of the closing element, this at least one first part of the sloping part is positioned at a second height above the cover, wherein the first height is greater than the second height, and the second height can be zero. Fig. 4E shows a fifth embodiment of the sealing element 28 on the outwardly projecting flange 20 of the capsule according to the invention, which together with the side wall 16 of the aluminum body of the capsule forms a support for the enclosing element. When compared with Fig. 4D, the following difference is noted. In this fifth embodiment, the flat part of the flat part 52 is located at a certain distance above the part of the outwardly projecting flange 20, located between the projection 53 and the curved edge 43. Therefore, this indicates that before use (see Fig. 4E), at least one first part of the flat part (in this example, at least a part of the inner side wall of the projection 53) is located at a first height above the cover. In use, when closing the enclosing element by means of the closing element, this at least one first part of the flat part is lowered by means of the free contact end of the ring element, moved towards the closing element, so that the flat part is at least partially bent around the free contact end. After closing the enclosing element by means of the closing element, this at least one first part of the flat part is located at a second height above the cover, wherein the first height is greater than the second height, and the second height can be zero.

In the embodiments shown in Fig. 4C-4E, the projection 53 comprises an outer side wall 54 of the projection, which is transverse to the part of the outwardly projecting flange located between the projection 53 and the twisted edge 43, but in other embodiments, this outer side wall 54 of the projection may have an inclination relative to the specified part of the outwardly projecting flange 20.

In all embodiments shown in Fig. 4A-4E, each of the projections comprises an upper portion of a projection. In preferred embodiments, at least one projection, but preferably all projections forming the support, has/have such a configuration that the upper portion of the projection ensures the application of a radial force to the free contact end of the annular element 41, if the capsule is installed in a given position in the enclosing element of the beverage preparation device and the enclosing element is closed by means of the closing element of the beverage preparation device. In addition, for each of the embodiments shown in Fig. 4A-4E, it is shown that before use, at least a first part of the support is located at a first height above the cover, wherein during use, when closing the enclosing element by means of the closing element, this at least one first part of the support is lowered by means of the free contact end of the ring element, moving towards the closing element, wherein the support is at least partially bent around the free contact end of the ring element so that after closing the enclosing element by means of the closing element, this at least one first part of the support is located at a second height above the cover, wherein the first height is greater than the second height, and the second height can be zero.

In the above description, the invention has been described with reference to specific examples of embodiments of the invention. However, it will be obvious that various modifications and changes can be made therein without departing from the broader spirit and scope of the invention as defined by the appended claims.

Claims (28)

1. A system for preparing a drinkable beverage from a capsule (2) by using a fluid medium supplied under pressure into the capsule, comprising: a beverage preparation device (4) comprising a female element (6) for receiving a capsule (2), wherein the female element (6) comprises a fluid injection means (10) intended for supplying a fluid under pressure into the capsule (2), wherein the beverage preparation device (4) further comprises a closing element (8), such as an extraction plate, intended for closing the female element (6) of the beverage preparation device (4), wherein the female element (6) of the beverage preparation device (4) further comprises an annular element (41) having a central axis (41A) of the annular element and a free contact end (30); and a capsule (2) containing a substance for preparing a drinkable beverage by extracting and/or dissolving the substance by feeding a fluid under pressure into the capsule (2), wherein the capsule (2) comprises an aluminum capsule body (12) having a central axis (12A) of the capsule body, wherein said aluminum capsule body (12) is formed with a bottom part (18), a side wall (16) and an outwardly protruding flange (20), furthermore, the capsule (2) further comprises an aluminum lid (14) attached to the outwardly protruding flange (20), wherein the lid (14) hermetically closes the capsule (2), and also the capsule (2) further comprises a sealing element (28) on the outwardly protruding flange (20) for providing sealing contact with the enclosing element (6) of the beverage preparation device (4) with respect to the fluid, if the capsule (2) is installed in the enclosing element (6) of the beverage preparation device (4) and the enclosing the element (6) is closed by means of the closing element (8) of the device (4) for preparing beverages, so that the outwardly protruding flange (20) of the capsule (2) and at least a part of the sealing element (28) of the capsule (2) are tightly captured between the enclosing element (6) and the closing element (8) of the device (4) for preparing beverages, characterized in that the capsule (2) forms a support for the enclosing element (6) of the device (4) for preparing beverages, if the capsule (2) is installed in the enclosing element (6) of the device (4) for preparing beverages and the enclosing element (6) is closed by means of the closing element (8) of the device (4) for preparing beverages, wherein said support is designed to enclose at least a part of the free contact end (30) of the annular element (41), and before use at least a first part of the support is located at a first height above the cover (14), and in use, when closing the enclosing element (6) by means of the closing element (8), this at least one first part of the support is made with with the possibility of lowering by means of the free contact end (30) of the annular element (41), movable in the direction of the closing element (8), wherein the support is designed with the possibility of at least partially bending around the free contact end (30) of the annular element (41) so that after closing the enclosing element (6) by means of the closing element (8), said at least one first part of the support is placed at a second height above the cover (14), and wherein the first height is greater than the second height, wherein the support, enclosing at least part of the free contact end (30) of the annular element (41), is at least partially formed by a sealing element (28), and the sealing element (28) comprises a projection (53) protruding from the outwardly protruding flange (20), and a sloping part (52) between the projection (53) and the side wall (16) of the aluminum body (12) of the capsule, wherein the support is formed by the projection (53), the sloping part (52) and the side wall (16) of the aluminum the capsule body (12), wherein the distance between the projection (53) and the side wall (16) is designed such that the free contact end (30) of the annular element (41) is embraced by the projection (53) and the side wall (16) of the aluminum capsule body (12), if the capsule (2) is installed in the enclosing element (6) of the beverage preparation device (4) and the enclosing element (6) is closed by means of the closing element (8) of the beverage preparation device (4), wherein before use at least one first part of the sloping part (52) is located at a first height above the cover (14), and in use, when closing the enclosing element (6) by means of the closing element (8), said at least one first part of the sloping part (52) is designed with the possibility of being lowered by means of the free contact end (30) of the annular element (41), movable in the direction of the closing element (8), so that the sloping part (52) at least partially bends around the free contact end (30), wherein after closing the enclosing element (6) by means of the closing element (8), said at least one first part of the sloping part (52) is placed at a second height above the cover (14), wherein the first height is greater than the second height. 2. The system according to claim 1, wherein the thickness of the aluminum body (12) of the capsule is 20-120 μm, preferably 100 μm. 3. A system according to any one of the preceding claims, wherein the aluminium lid (14) is designed to rupture on a closing element (8) of a beverage preparation device (4), such as an extraction plate of a beverage preparation device (4), under the action of the pressure of the fluid in the capsule (2). 4. A system according to any one of the preceding claims, in which the side wall (16) of the aluminium body (12) of the capsule has a free end (42) opposite the lower part (18), wherein an outwardly projecting flange (20) projects from said free end (42) of the side wall (16) in a direction at least transverse to the central axis (12A) of the capsule body, wherein the outwardly projecting flange (20) comprises a twisted outer edge (43), and the sealing element (28) is located between the free end (42) of the side wall (16) of the aluminium body (12) of the capsule and the inner edge of the twisted outer edge (43) of the outwardly projecting flange (20). 5. A system according to any one of the preceding claims, in which the part of the sealing element which is designed so that the free end of the enclosing element (6) first comes into contact with it when the enclosing element (6) is closed has a height which is at least approximately 0.1 mm, more preferably at least 0.2 mm and most preferably at least 0.8 mm and at most 3 mm, more preferably at most 2 mm and most preferably at most 1.2 mm. 6. A system according to any of the preceding claims, wherein the distance between the protrusion (53) and the side wall (16) of the aluminium body (12) of the capsule is designed so that the protrusion (53) and the side wall (16) of the aluminium body of the capsule (12) come into contact with the free contact end (30) of the ring element (41) if the capsule (2) is installed in the enclosing element (6) of the device (4) for preparing beverages and the enclosing element (6) is closed by means of the closing element (8) of the device (4) for preparing beverages. 7. A system according to any of the preceding claims, in which the projection (53), the side wall (16) of the aluminium body (12) of the capsule and the flat part (52) are designed so that the flat part (52) comes into contact with the free contact end (30) of the ring element (41) if the capsule (2) is installed in the enclosing element (6) of the device (4) for preparing beverages and the enclosing element (6) is closed by means of the closing element (8) of the device (4) for preparing beverages. 8. A system according to any of the preceding claims, wherein the projection (53) comprises an upper portion of the projection, and wherein the projection (53) is designed in such a way that the upper portion of the projection ensures the application of a radial force to the free contact end (30) of the annular element (41) if the capsule (2) is installed in the enclosing element (6) of the beverage preparation device (4) and the enclosing element (6) is closed by means of the closing element (8) of the beverage preparation device (4). 9. A system according to any of the preceding claims, wherein the protrusion (53) comprises a side wall (54) of the protrusion which has an inclination relative to the outwardly projecting flange (20) of the aluminium body (12) of the capsule. 10. A system according to any of the preceding claims, wherein the flat portion (52) is flat. 11. The system according to any one of claims 1 to 9, wherein the flat part (52) comprises a curved part. 12. The system according to any one of claims 1 to 3, wherein the flat part (52) is flat, and wherein the flat part (52) has an inclination relative to the outwardly protruding flange (20) of the aluminum body (12) of the capsule. 13. A system according to any one of the preceding claims, wherein the sealing element (28) is deformable such that said support encloses, in a fluid-sealing manner, at least part of the free contact end (30) of the annular element (41), if, in use, the maximum pressure of the fluid in the enclosing element (6) of the beverage preparation device (4) is in the range of 6-20 bar, preferably between 12 and 18 bar. 14. A system according to any one of the preceding claims, wherein the sealing element (28) is deformable in such a way that said support encloses, in a sealing manner with respect to the fluid, at least part of the free contact end (30) of the annular element (41), if during cooking said free contact end (30) of the annular element (41) ensures the application of a force F2 to the sealing element of the capsule (2), wherein the force F2 is in the range of 500-1500 N, preferably in the range of 750-1250 N, when the pressure P2 of the fluid in said enclosing element (6) outside the capsule (2) is in the range of 6-20 bar, preferably between 12 and 18 bar. 15. A system according to any one of the preceding claims, wherein the sealing element is deformable in such a way that said support encloses, in a sealing manner with respect to the fluid, at least part of the free contact end (30) of the annular element (41), if, when used before brewing or at the start of brewing, said free contact end (30) of the annular element (41) ensures the application of a force F1 to the sealing element of the capsule, wherein the force F1 is in the range of 30-150 N, preferably 40-150 N and more preferably 50-100 N, when the pressure P1 of the fluid in the enclosing element of the beverage preparation device outside the capsule is in the range of 0.1-4 bar, preferably 0.1-1 bar. 16. A system according to any one of the preceding claims, wherein the sealing element (28) is deformable so that said support covers, in a sealing manner with respect to a fluid, at least part of the free contact end (30) of the annular element (41), if the free contact end of the annular element (41), which is pressed against the sealing element (28), has a plurality of open grooves (40) extending in the radial direction, uniformly distributed relative to each other in the direction along the circumference of said free contact end (30) of the annular element (41). 17. The system according to claim 16, wherein the sealing element is deformable so that said support covers, with the provision of sealing, at least part of the free contact end (30) of the annular element (41), if the greatest width of each of said grooves (40) is 0.9-1.1 mm, preferably 0.95-1.05 mm, more preferably 0.98-1.02 mm, wherein the maximum height of each of said grooves (40) in the axial direction of the enclosing element of the beverage preparation device (4) is 0.01-0.09 mm, preferably 0.03-0.07 mm, more preferably 0.045-0.055 mm, most preferably 0.05 mm, and wherein the number of said grooves (40) is 90-110, preferably 96. 18. A system according to any of the preceding claims, wherein the sealing element (28) and the rest of the body (12) of the capsule are made from the same sheet material. 19. A system according to any of the preceding claims, wherein the free contact end (30) of the annular element (41) has a plurality of radially extending grooves (40). 20. A system according to any one of claims 1 to 19, wherein, in use, the maximum pressure of the fluid in the enclosing element (6) of the beverage preparation device (4) is in the range of 6-20 bar, preferably between 12 and 18 bar. 21. The system according to any one of claims 1 to 20, wherein the system is designed such that, when used during brewing, the free end (30) of the enclosing element (6) of the beverage preparation device (4) ensures the application of a force F2 to the sealing element (28) of the capsule (2) to ensure a sealing contact with respect to the fluid medium between the outwardly protruding flange (20) of the capsule (2) and the enclosing element (6) of the beverage preparation device (4), wherein the force F2 is in the range of 500-1500 N, preferably in the range of 750-1250 N, when the pressure P2 of the fluid medium in the enclosing element (6) of the beverage preparation device (4) outside the capsule (2) is in the range of 6-20 bar, preferably between 12 and 18 bar. 22. The system according to any one of claims 1 to 21, wherein the system is designed such that, when used before brewing or at the beginning of brewing, the free end (30) of the enclosing element (6) of the beverage preparation device (4) ensures the application of a force F1 to the sealing element (28) of the capsule (2) to ensure a sealing contact with respect to the fluid medium between the outwardly protruding flange (20) of the capsule (2) and the enclosing element (6) of the beverage preparation device (4), wherein the force F1 is in the range of 30-150 N, preferably 40-150 N, more preferably 50-100 N, when the pressure P1 of the fluid in the enclosing element (6) of the beverage preparation device (4) outside the capsule (2) is in the range of 0.1-4 bar, preferably 0.1-1 bar. 23. The system according to claim 19, in which a plurality of radially extending open grooves (40) are uniformly distributed relative to each other in the circumferential direction of the free contact end (30) of the annular element (41) of the device (4) for preparing beverages. 24. The system according to claim 23, wherein the greatest width of each groove (40) is 0.9-1.1 mm, preferably 0.95-1.05 mm, more preferably 0.98-1.02 mm, wherein the maximum height of each groove (40) in the axial direction of the enclosing element (6) of the beverage preparation device (4) is 0.01-0.09 mm, preferably 0.03-0.07 mm, more preferably 0.045-0.055 mm, most preferably 0.05 mm and wherein the number of grooves (40) is 90-110, preferably 96, wherein, if necessary, the width of the free contact end (30) in the radial direction at the location of the grooves (40) is 0.05-0.9 mm, preferably 0.2-0.7 mm and more preferably 0.3-0.55 mm. 25. The system according to any one of claims 1 to 24, in which during use, when the closing element (8) of the beverage preparation device (4) closes the enclosing element (6) of the beverage preparation device (4), at least the free contact end (30) of the enclosing element (6) of the beverage preparation device (4) is configured to move relative to the closing element (8) of the beverage preparation device (4) under the action of the pressure of the fluid in the enclosing element (6) of the beverage preparation device (4) to the closing element (8) of the beverage preparation device (4) to apply a maximum force between the flange (20) of the capsule (2) and the free end (30) of the enclosing element (6) of the beverage preparation device (4), wherein if necessary the enclosing element (6) comprises a first component (6a) and a second component (6b), wherein the second component (6b) comprises the free contact end (30) of the enclosing element (6), the second component (6b) is configured to move relative to the first component (6a) between the first and second positions and the second component (6b) is designed to move from the first position to the second position in the direction of the closing element (8) under the action of the fluid pressure in the enclosing element (6), whereby, if necessary, the force F1 according to claim 22 is achieved if the second component (6b) is in the first position at the fluid pressure P1 in the enclosing element (6), as specified in claim 22, and whereby, if necessary, the force F2 according to claim 21 is achieved if the second component (6b) is moved towards the second position under the action of the fluid pressure P2 in the enclosing element (6), as specified in claim 21. 26. The system according to any one of claims 1 to 25, in which, during use, when the closing element (8) of the beverage preparation device (4) closes the enclosing element (6) of the beverage preparation device (4), the enclosing element (6) of the beverage preparation device (4) is designed to move relative to the closing element (8) of the beverage preparation device (4) under the action of the pressure of the fluid in the enclosing element (6) of the beverage preparation device (4) towards the closing element (8) of the beverage preparation device (4) to apply a maximum force between the flange (20) of the capsule (2) and the free end (30) of the enclosing element (6) of the beverage preparation device (4).