NL2016782A - A capsule, a system for preparing a potable beverage from such a capsule and use of such a capsule in a beverage preparation device - Google Patents

A capsule, a system for preparing a potable beverage from such a capsule and use of such a capsule in a beverage preparation device Download PDF

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Publication number
NL2016782A
NL2016782A NL2016782A NL2016782A NL2016782A NL 2016782 A NL2016782 A NL 2016782A NL 2016782 A NL2016782 A NL 2016782A NL 2016782 A NL2016782 A NL 2016782A NL 2016782 A NL2016782 A NL 2016782A
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NL
Netherlands
Prior art keywords
capsule
preparation device
beverage preparation
aluminum
sealing
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Application number
NL2016782A
Other languages
Dutch (nl)
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NL2016782B1 (en
Inventor
Dijkstra Hielke
Hendrik Groothornte Arend
Sjoerd Eijsackers Armin
Kamerbeek Ralf
Pieter Van Gaasbeek Erik
Henrikus Joseph Ottenschot Marc
Henri Flamand John
Original Assignee
Douwe Egberts Bv
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Publication date
Application filed by Douwe Egberts Bv filed Critical Douwe Egberts Bv
Publication of NL2016782A publication Critical patent/NL2016782A/en
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Publication of NL2016782B1 publication Critical patent/NL2016782B1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
    • B65D85/70—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for
    • B65D85/804—Disposable containers or packages with contents which are mixed, infused or dissolved in situ, i.e. without having been previously removed from the package
    • B65D85/8043—Packages adapted to allow liquid to pass through the contents
    • B65D85/8064—Sealing means for the interface with the processing machine

Abstract

Capsule containing a substance for the preparation of a potable beverage. The capsule comprises an aluminum capsule body having a side wall and an outwardly extending flange and a sealing member at the outwardly extending flange for providing a fluid sealing contact with an enclosing member of a beverage preparation device. The beverage preparation device comprises an annular element having a free contact end which is provided with a plurality of radially extending open grooves. The sealing member is formed by the outwardly extending flange of the aluminum capsule body, wherein at least said outwardly extending flange is made of aluminum sponge.

Description

Title: A capsule, a system for preparing a potable beverage from such a capsule and use of such a capsule in a beverage preparation device
The invention relates to a capsule containing a substance for the preparation of a potable beverage by extracting and/or dissolving the substance by means of supplying a fluid under pressure into the capsule, wherein the capsule comprises an aluminum capsule body having a central capsule body axis, said aluminum capsule body being provided with a bottom, a side wall and an outwardly extending flange, the capsule further comprising an aluminum cover attached to the outwardly extending flange, the cover hermetically closing the capsule, wherein the capsule further comprises a sealing member at the outwardly extending flange for providing a fluid sealing contact with an enclosing member of a beverage preparation device if the capsule is positioned in the enclosing member of the beverage preparation device and the enclosing member is closed by means of a closing member of the beverage preparation device, such as an extraction plate of the beverage preparation device, such that the outwardly extending flange of the capsule and at least a portion of the sealing member of the capsule are sealingly engaged between the enclosing member and the closing member of the beverage preparation device, wherein the enclosing member of the beverage preparation device comprises an annular element having a central annular element axis and a free contact end, said free contact end of the annular element optionally being provided with a plurality of radially extending open grooves.
The invention also relates to a system for preparing a potable beverage from a capsule using a fluid supplied under pressure into the capsule comprising: a beverage preparation device comprising an enclosing member for receiving the capsule, wherein the enclosing member comprises fluid supply means for supplying fluid under pressure into the capsule, wherein the beverage preparation device further comprises a closing member, such as an extraction plate, for closing the enclosing member of the beverage preparation device, wherein the enclosing member of the beverage preparation device further comprises an annular element having a central annular element axis and a free contact end, said free contact end of the annular element optionally being provided with a plurality of radially extending open grooves; a capsule containing a substance for the preparation of a potable beverage by extracting and/or dissolving the substance by means of the fluid supplied under pressure into the capsule by the fluid supply means of the beverage preparation device, wherein the capsule comprises an aluminum capsule body having a central capsule body axis, said aluminum capsule body being provided with a bottom, a side wall and an outwardly extending flange, the capsule further comprising an aluminum cover attached to the outwardly extending flange, the cover hermetically closing the capsule, wherein the capsule further comprises a sealing member at the outwardly extending flange for providing a fluid sealing contact with the enclosing member of the beverage preparation device if the capsule is positioned in the enclosing member of the beverage preparation device and the enclosing member is closed by means of the closing member of the beverage preparation device, such that the outwardly extending flange of the capsule and at least a portion of the sealing member of the capsule are sealingly engaged between the enclosing member and the closing member of the beverage preparation device.
Furthermore the invention relates to the use of a capsule in a beverage preparation device comprising an enclosing member for receiving the capsule, wherein the enclosing member comprises fluid supply means for supplying fluid under pressure into the capsule, wherein the beverage preparation device further comprises a closing member, such as an extraction plate, for closing the enclosing member of the beverage preparation device, wherein the enclosing member of the beverage preparation device further comprises an annular element having a central annular element axis and a free contact end, said free contact end of the annular element optionally being provided with a plurality of radially extending open grooves; wherein the capsule contains a substance for the preparation of a potable beverage by extracting and/or dissolving the substance by means of the fluid supplied under pressure into the capsule by the fluid supply means of the beverage preparation device, wherein the capsule comprises an aluminum capsule body having a central capsule body axis, said aluminum capsule body being provided with a bottom, a side wall and an outwardly extending flange, the capsule further comprising an aluminum cover attached to the outwardly extending flange, the cover hermetically closing the capsule, wherein the capsule further comprises a sealing member at the outwardly extending flange for providing a fluid sealing contact with the enclosing member of the beverage preparation device if the capsule is positioned in the enclosing member of the beverage preparation device and the enclosing member is closed by means of the closing member of the beverage preparation device, such that the outwardly extending flange of the capsule and at least a portion of the sealing member of the capsule are sealingly engaged between the enclosing member and the closing member of the beverage preparation device.
Such a capsule, system and use are known from EP-B-1 700 548. In the known system the capsule is provided with a sealing member having the shape of a step, i.e. a sudden increase of the diameter of the side wall of the capsule, and the enclosing member of this known system has a sealing surface acting on the sealing member to provide deflection of the sealing member, the sealing surface being inclined so that the deflection of the sealing member is an inwards and downwards deformation of the step. Furthermore in the known system the enclosing member comprises a capsule holder and a manually operated or an automatic mechanism for relative displacement of the enclosing member and the capsule holder. The manually operated or an automatic mechanism applies a force on the sealing member of the capsule when the enclosing member closes on the capsule holder. This force should ensure the fluid tight seal between the enclosing member and the capsule. Because the manually operated or an automatic mechanism is arranged to be moved relative to the base, the sealing capabilities of the system can depend on the pressure of the fluid supplied by the fluid supply means. If the pressure of the fluid increases, the force between the sealing member of the capsule and the free end of the enclosing member increases too and thereby the force between the sealing member of the capsule and the free end of the enclosing member increases also. Such a system is described further on. The sealing member of the capsule must be arranged such that upon reaching the maximum fluid pressure in the enclosing member the sealing member should still provide a fluid sealing contact between the enclosing member and the capsule. However, the sealing member must also be arranged such that prior to, or at the start of, brewing when the pressure of the fluid in the enclosing member outside the capsule is relatively low, the sealing member also provides a fluid sealing contact between the enclosing member and the capsule. If at the start of brewing, there would not exist a fluid sealing contact between the capsule and the enclosing member, leakage will occur. However, if leakage occurs there is a real chance that the pressure in the enclosing member and outside the capsule will not sufficiently increase for increasing the force on the sealing member by means of the free end of the enclosing member if the manually operated or an automatic mechanism moves the enclosing member towards the capsule holder. Only if there is a sufficient initial sealing, the pressure in the enclosing member will increase whereby also the force of the free end of the enclosing member acting on the sealing member of the capsule will increase for providing a sufficient fluid sealing contact at also the increased fluid pressure. Moreover, this increased fluid pressure outside the capsule also provides an increased fluid pressure inside the capsule which is essential if the capsule is provided with a cover which is arranged to tear open on relief members of the capsule holder (also called an extraction plate) of the beverage preparation device under the influence of fluid pressure in the capsule.
It follows from the above that the sealing member is a member which is very critical in design. It should be able to provide a fluid sealing contact between the enclosing member and the capsule at a relatively low fluid pressure if only a relatively small force is applied on the sealing member by means of the free end of the enclosing member but it should also provide a fluid sealing contact at a much higher fluid pressure in the enclosing member outside the capsule if a higher force is applied by means of the free end of the enclosing member to the sealing member of the capsule. In particular when the free contact end of the enclosing member is provided with radially extending open grooves which act as air inlet passage once the force between the enclosing member and the capsule holder is released so that it is easier for a user to take out the capsule, the sealing member must also be able to ‘close’ the radially extending open grooves to provide an effective seal.
It is an object of the invention to provide an alternative sealing member which is relatively easy to manufacture, which is environmentally friendly if the capsule is disposed of after use and/or which provides a satisfactory sealing both at a relatively low fluid pressure if only a relatively small force is applied on the sealing member by means of the free end of the enclosing member (sometimes also called initial seal) and at a much higher fluid pressure if a higher force is applied (e.g. during brewing) by means of the free end of the enclosing member to the sealing member of the capsule, even in case of an enclosing member of which the free contact end is provided with radially extending open grooves.
The invention has also as an object to provide an alternative system for preparing a potable beverage from a capsule and to provide an alternative use of a capsule in a beverage preparation device.
In accordance with the invention there is provided in a first aspect a capsule containing a substance for the preparation of a potable beverage by extracting and/or dissolving the substance by means of supplying a fluid under pressure into the capsule, wherein the capsule comprises an aluminum capsule body having a central capsule body axis, said aluminum capsule body being provided with a bottom, a side wall and an outwardly extending flange, the capsule further comprising an aluminum cover attached to the outwardly extending flange, the cover hermetically closing the capsule, wherein the capsule further comprises a sealing member at the outwardly extending flange for providing a fluid sealing contact with an enclosing member of a beverage preparation device if the capsule is positioned in the enclosing member of the beverage preparation device and the enclosing member is closed by means of a closing member of the beverage preparation device, such as an extraction plate of the beverage preparation device, such that the outwardly extending flange of the capsule and at least a portion of the sealing member of the capsule are sealingly engaged between the enclosing member and the closing member of the beverage preparation device, wherein the enclosing member of the beverage preparation device comprises an annular element having a central annular element axis and a free contact end, said free contact end of the annular element optionally being provided with a plurality of radially extending open grooves, characterized in that, the sealing member is formed by the outwardly extending flange of the aluminum capsule body, wherein at least said outwardly extending flange is made of aluminum sponge. Since the sealing member is made of aluminum sponge it is not only relatively easy to manufacture but in addition it appears to be able to provide a satisfactory seal during use. In particular the sealing member can provide a satisfactory sealing with the free contact end provided with radially extending open grooves. In addition it is environmentally friendly if the capsule is disposed of after use. Please note that aluminum sponge is sometimes also called aluminum foam.
In this application the existence of a fluid sealing contact means that 0-6%, preferably 0-4%, more preferably 0-2.5% of the total fluid supplied to the enclosing member for preparing the beverage may leak away due to leakage between the free contact end and the sealing member of the capsule.
The invention is in particular advantageous when in an embodiment of a capsule the capsule contains an extractable product as substance for the preparation of a potable beverage, said extractable product preferably being 5-20 grams, preferably 5-10 grams, more preferably 5-7 grams of roasted and ground coffee.
In an embodiment of a capsule according to the invention which is in particular easy to manufacture the outer diameter of the outwardly extending flange of the capsule is larger than the diameter of the bottom of the capsule. Preferably, the outer diameter of the outwardly extending flange is approximately 37.1 mm and the diameter of the bottom of the capsule is about 23.3 mm.
The invention is in particular advantageous when in an embodiment of a capsule the thickness of the aluminum capsule body is such that it is deformed easily if the capsule is positioned in the enclosing member of the beverage preparation device and the enclosing member is closed by means of a closing member of the beverage preparation device, preferably the thickness of the aluminum capsule body is 20 to 200 micrometer, preferably 100 micrometer.
The invention is in particular advantageous when in an embodiment of a capsule the thickness of the aluminum cover is 15 to 65 micrometer, preferably 30 to 45 micrometer, and most preferred 39 micrometer.
In an embodiment of a capsule according to the invention the wall thickness of the aluminum cover is smaller than the wall thickness of the aluminum capsule body.
In a further embodiment of a capsule according to the invention the aluminum cover is arranged to tear open on a closing member of the beverage preparation device, such as an extraction plate of the beverage preparation device under the influence of fluid pressure in the capsule.
In an embodiment of a capsule according to the invention which is in particular easy to manufacture the side wall of the aluminum capsule body has a free end opposite the bottom, the outwardly extending flange extending from said free end of the side wall in a direction at least substantially transverse to the central capsule body axis. Preferably, the outwardly extending flange comprises a curled outer edge, which is beneficial in obtaining for a satisfactory sealing with the free contact end provided with radially extending open grooves.
The radius about the central capsule body axis of an inner edge of the curled outer edge of the outwardly extending flange is preferably at least 32 mm, so that clearance from the annular end surface of the enclosure member is ensured. It is then preferred that the sealing member is positioned between the free end of the side wall of the aluminum capsule body and an inner edge of the curled outer edge of the outwardly extending flange to obtain a still further satisfactory sealing.
To ensure that the curled outer edge does not interfere with operation of a wide variety of commercially available and future beverage preparation apparatuses, the curled outer edge of the outwardly extending flange has a largest dimension of about 1.2 millimeter.
The invention is in particular beneficial for capsules of which the inner diameter of the free end of the side wall of the aluminum capsule body is about 29.5 mm. The distance between the free end of the side wall of the aluminum capsule body and an outermost edge of the outwardly extending flange can be about 3.8 millimeter. The preferred height of the aluminum capsule body is about 28.4 mm.
In an embodiment of a capsule according to the invention which after use is easier for a user to take out of a beverage preparation device the aluminum capsule body is truncated, wherein preferably the side wall of the aluminum capsule body encloses an angle with a line transverse to the central capsule body axis of about 97.5°.
In an advantageous embodiment of a capsule according to the invention the bottom of the aluminum capsule body has a largest inner diameter of about 23.3 mm. It is preferred that the bottom of the aluminum capsule body is truncated, preferably having a bottom height of about 4.0 mm and that the bottom further has a generally flat central portion opposite the cover having a diameter of about 8.3 mm.
In a preferred embodiment of a capsule according to the invention the capsule comprises an inner surface, and wherein on the inner surface of at least the side wall of the capsule an inner coating is provided. In particular when the capsule is manufactured by deep drawing the inner coating facilitates the deep drawing process. In case the aluminum cover of the capsule is attached to the outwardly extending flange by means of a sealing lacquer it is then in particular advantageous when said inner coating being composed of the same material as the sealing lacquer. Alternatively, in order to improve the sealing during use on the outer surface of the sealing member an outer coating is provided, whereas the outer surface of the sealing member is free from a color lacquer.
In a further embodiment of a capsule according to the invention the capsule comprises an outer surface, wherein on the outer surface of the capsule a color lacquer is provided. In order to facilitate in deep drawing it is preferred to provide on an outer surface of the color lacquer an outer coating. In dependence of the color lacquer and outer coating used it is preferred that the sealing member is free from a color lacquer (and consequently the outer coating) in order to prevent crumbling off of the color lacquer/outer coating from the sealing member.
Although it is possible that only the sealing member is made of aluminum sponge, from a manufacturing point of view it is easier when the aluminum capsule body is made of aluminum sponge. Preferably the aluminum sponge comprises a porosity in the range of 75 - 95%, preferably a porosity of 80 - 85%, meaning that 75 -95%, or preferably 80 - 85% of the volume of the aluminum sponge is empty space. An aluminum sponge particularly suitable for a capsule containing a substance for the preparation of a potable beverage is obtained when the aluminum sponge is produced by mixing T1H2 as a foaming agent into molten aluminum.
In a preferred embodiment of a capsule according to the invention the sealing member is formed by aluminum. Please note that with aluminum also aluminum alloys are meant.
In a further embodiment of a capsule according to the invention only the outwardly extending flange is made of aluminum sponge, comprising air pockets.
In accordance with the invention there is provided in a second aspect a system for preparing a potable beverage from a capsule using a fluid supplied under pressure into the capsule comprising: a beverage preparation device comprising an enclosing member for receiving the capsule, wherein the enclosing member comprises fluid supply means for supplying fluid under pressure into the capsule, wherein the beverage preparation device further comprises a closing member, such as an extraction plate, for closing the enclosing member of the beverage preparation device, wherein the enclosing member of the beverage preparation device further comprises an annular element having a central annular element axis and a free contact end, said free contact end of the annular element optionally being provided with a plurality of radially extending open grooves; a capsule containing a substance for the preparation of a potable beverage by extracting and/or dissolving the substance by means of the fluid supplied under pressure into the capsule by the fluid supply means of the beverage preparation device, wherein the capsule comprises an aluminum capsule body having a central capsule body axis, said aluminum capsule body being provided with a bottom, a side wall and an outwardly extending flange, the capsule further comprising an aluminum cover attached to the outwardly extending flange, the cover hermetically closing the capsule, wherein the capsule further comprises a sealing member at the outwardly extending flange for providing a fluid sealing contact with the enclosing member of the beverage preparation device if the closed capsule is positioned in the enclosing member of the beverage preparation device and the enclosing member is closed by means of the closing member of the beverage preparation device, such that the outwardly extending flange of the closed capsule and at least a portion of the sealing member of the closed capsule are sealingly engaged between the enclosing member and the closing member of the beverage preparation device, characterized in that, the sealing member is formed by the outwardly extending flange of the aluminum capsule body, wherein at least said outwardly extending flange is made of aluminum sponge. Since the sealing member is formed of aluminum sponge it is not only relatively easy to manufacture but in addition it appears to be able to provide a satisfactory seal during use. In particular the sealing member can provide a satisfactory sealing with the free contact end provided with radially extending open grooves. In addition it is environmentally friendly if the capsule is disposed of after use.
Regarding the preferred embodiments of the system as mentioned in the dependent claims which relate to the same features as the features of the dependent claims of the capsule reference is made to the above.
The invention is particularly suitable in a system according to the invention wherein, in use, the maximum fluid pressure in the enclosing member of the beverage preparation device is in the range of 6-20 bar, preferably between 12 and 18 bar. Even at this high pressures a satisfactory seal between capsule and beverage preparation device can be obtained.
Preferably the system is arranged such that, in use, during brewing, a free end of the enclosing member of the beverage preparation device exerts a force F2 on the sealing member of the capsule to provide a fluid sealing contact between the outwardly extending flange of the capsule and the enclosing member 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 fluid pressure P2 in the enclosing member 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 arranged such that, in use, prior to or at the start of brewing, a free end of the enclosing member of the beverage preparation device exerts a force FI on the sealing member of the capsule to provide a fluid sealing contact between the outwardly extending flange of the capsule and the enclosing member of the beverage preparation device, wherein FI is in the range of 30-150 N preferably in the range of 40-150 N, more preferably 50-100 N, when the fluid pressure Pi in the enclosing member of the beverage preparation device outside the capsule is in the range of 0.1 - 4 bar, preferably between 0.1-1 bar.
In an embodiment of a system according to the invention wherein the plurality of radially extending open grooves are uniformly spaced relative to each other in tangential direction of the free contact end of the annular element of the beverage preparation device so that it is easier for a user to take out the capsule while a satisfactory seal between capsule and beverage preparation device can still be provided.
In an advantageous embodiment of a system according to the invention the longest tangential width of each groove (top to top, i.e. equal to the groove to groove pitch) is 0.9 - 1.1 mm, preferably 0.95 to 1.05 mm, more preferably 0.98 to 1.02 mm, wherein a maximal height of each groove in an axial direction of the enclosing member of the beverage preparation device is 0.01 - 0.09 mm, preferably 0.03 to 0.07 mm, more preferably 0.045 to 0.055 mm, most preferred 0.05 mm and wherein the number of grooves is 90 to 110, preferably 96. The radial width of the annular end surface at the location of the grooves may for instance be 0.05- 0.9 mm, preferably 0.2- 0.7 mm and more preferably 0.3 - 0.55 mm. The invention is in particular suitable when applied to an embodiment of a system according to the invention in which during use when the closing member of the beverage preparation device closes the enclosing member of the beverage preparation device at least the free contact end of the enclosing member of the beverage preparation device can move relative to the closing member of the beverage preparation device under the effect of the pressure of the fluid in the enclosing member of the beverage preparation device towards the closing member of the beverage preparation device for applying the maximum force between the flange of the capsule and the free end of the enclosing member of the beverage preparation device. The enclosing member may comprise a first part and a second part wherein the second part comprises the free contact end of the enclosing member wherein the second part can move relative to the first part between a first and second position. The second part can move from the first positon towards the second position in the direction of the closing member under the influence of fluid pressure in the enclosing member. The force FI as discussed above may be reached if the second part is in the first position with a fluid pressure PI. The force F2 as discussed above may be reached if the second part is moved towards the second position under the influence of the fluid pressure P2 in the enclosing member.
In accordance with the invention there is provided in a third aspect a use of a capsule according to the invention in a beverage preparation device comprising an enclosing member for receiving the capsule, wherein the enclosing member comprises fluid supply means for supplying fluid under pressure into the capsule, wherein the beverage preparation device further comprises a closing member, such as an extraction plate, for closing the enclosing member of the beverage preparation device, wherein the enclosing member of the beverage preparation device further comprises an annular element having a central annular element axis and a free contact end, said free contact end of the annular element optionally being provided with a plurality of radial grooves; wherein the capsule contains a substance for the preparation of a potable beverage by extracting and/or dissolving the substance by means of the fluid supplied under pressure into the capsule by the fluid supply means of the beverage preparation device, wherein the capsule comprises an aluminum capsule body having a central capsule body axis, said aluminum capsule body being provided with a bottom, a side wall and an outwardly extending flange, the capsule further comprising an aluminum cover attached to the outwardly extending flange, the cover hermetically closing the capsule, wherein the capsule further comprises a sealing member at the outwardly extending flange for providing a fluid sealing contact with the enclosing member of the beverage preparation device if the closed capsule is positioned in the enclosing member of the beverage preparation device and the enclosing member is closed by means of the closing member of the beverage preparation device, such that the outwardly extending flange of the capsule and at least a portion of the sealing member of the closed capsule are sealingly engaged between the enclosing member and the closing member of the beverage preparation device. Regarding the advantage of the inventive use and the preferred embodiments of the use as mentioned in the dependent claims which relate to the same features as the features of the dependent claims of the capsule or the dependent claims of the system reference is made to the above.
The invention will now be further elucidated by means of, nonlimiting, examples referring to the drawing, in which
Fig. 1 shows a schematic representation of an embodiment of a system according to the invention;
Fig. 2 in a perspective view shows an embodiment of a beverage preparation device of a system according to the invention showing the free contact end of the enclosing member of the beverage preparation device with the plurality of radially extending open grooves;
Fig. 3A in cross section shows an embodiment of a capsule according to the invention before use;
Fig. 3B shows an enlarged detail of a the capsule of Fig. 3A showing the outwardly extending flange and the sealing member;
Fig. 3C shows an enlarged detail of the outwardly extending flange of the capsule in Figures 3A and 3B after use; and
Figure 4 schematically shows an outwardly extending flange of aluminum sponge indicating the air pockets.
In the Figures and the following description, like reference numerals refer to like features.
Fig. 1 shows a schematic representation, in cross sectional view, of an embodiment of a system 1 for preparing a potable beverage from a capsule 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 enclosing member 6 for holding the capsule 2. The device 4 further comprises a closing member, such as an extraction plate, 8 for supporting the capsule 2.
In Fig. 1 a gap is drawn between the capsule 2, the enclosing member 6 and the extraction plate 8 for clarity. It will be appreciated that, in use, the capsule 2 may lie in contact with the enclosing member 6 and the extraction plate member 8. Commonly, the enclosing member 6 has a shape complementary to the shape of the capsule 2. The apparatus 4 further comprises a fluid supply means 10 for supplying an amount of a fluid, such as water, under a pressure in the range of 6-20 bar, preferably between 12 and 18 bar, to the exchangeable capsule 2.
In the example shown in Fig. 1, the exchangeable capsule 2 comprises an aluminum capsule body 12 having a central capsule body axis 12A and an aluminum cover 14. In the present context, the meaning of 'aluminum' is understood to also include aluminum alloy. In this example, the aluminum capsule body 12 is made of aluminum sponge and comprises a side wall 16, a bottom 18 closing the side wall 16 at a first end, and a outwardly extending flange 20 extending outwardly of the circumferential wall 16 at a second end opposite the bottom 18. The side wall 16, the bottom 18 and the cover 14 enclose an inner space 22 comprising a substance for the preparation of a potable beverage by extracting and/or dissolving the substance. Preferably the substance contains an extractable product for the preparation of a potable beverage, said extractable product preferably being 5-20 grams, preferably 5-10 grams, more preferably 5-7 grams of roasted and ground coffee for the preparation of a single beverage. The capsule is initially sealed, i.e. is hermetically closed prior to use.
The system 1 of Fig. 1 comprises bottom piercing means 24 for piercing the bottom 18 of the capsule 2 for creating at least one entrance opening 25 in the bottom 18 for supplying the fluid to the extractable product through the entrance opening 25.
The system 1 of Fig. 1 further comprises cover piercing means 26, here embodied as protrusions of the closing member 8, for piercing the cover 14 of the capsule 2. The cover piercing means 26 may be arranged to tear the cover 14 once a (fluid) pressure inside the inner space 22 exceeds a threshold pressure and presses the cover 14 against the cover piercing means 26 with sufficient force. The aluminum cover 14 thus is arranged to tear open on the closing member 8 of the beverage preparation device under the influence of fluid pressure in the capsule.
The capsule 2 further comprises a sealing member 28, which sealing member 28 is formed by the outwardly extending flange 20 for providing a fluid sealing contact with the enclosing member 6 if the capsule 2 is positioned in the enclosing member 6 and the enclosing member 6 is closed by means of the extraction plate 8, such that the outwardly extending flange 20 of the capsule 2 and at least a portion of the sealing member 28 are sealingly engaged between the enclosing member 6 and the extraction plate 8. According to the invention the sealing member 28 is formed by the outwardly extending flange 20 of the aluminum capsule body 2 which is made of aluminum sponge. In most cases it suffices for a satisfactory sealing to be obtained when only the flange 20 is made of aluminum sponge and is a flat surface which extends transversely to the central axis 12A from the side wall 16 to the curled edge 43. In this case the outwardly extending flange 20 forms the sealing member. In such an embodiment it is beneficial from a manufacturing point of view when the complete aluminum capsule body is made of aluminum sponge. The aluminum sponge material used has a porosity in the range of 75-95%, preferably a porosity of 80-85% and is produced by mixing T1H2 as a foaming agent into molten aluminum. As schematically represented in Figure 4 the aluminum sponge comprises air pockets 201. This means that a fluid sealing contact between the sealing member and the free contact end is established.
As shown in Figure 2 the enclosing member 6 of the beverage preparation device comprises an annular element 41 having a central annular element axis 41A and a free contact end 30. The free contact end 30 of the annular element 41 is provided with a plurality of radially extending open grooves 40. The plurality of radially extending open grooves 40 are uniformly spaced relative to each other in tangential direction of the free contact end 30 of the annular element 41. The longest tangential width of each groove 40 is 0.9 - 1.1 mm, preferably 0.95 to 1.05 mm, more preferably 0.98 to 1.02 mm, wherein a maximal height of each groove 40 in an axial direction of the enclosing member 6 is 0.01 - 0.09 mm, preferably 0.03 to 0.07 mm, more preferably 0.045 to 0.055 mm, and most preferred 0.05 mm. The number of grooves 40 lies in the range of 90 to 110, preferably 96. Usually, the radial width of the free end at the location of the grooves is 0.05 - 0.9 mm, more specifically 0.2 - 0.7 mm, more specifically 0.3 - 0.55 mm.
An embodiment of a capsule according to the invention is shown more detailed in Figures 3A and 3B. In the shown embodiment the outer diameter ODF of the outwardly extending flange 20 is larger than the diameter DB of the bottom 18 of the capsule 2. In the shown embodiment the outer diameter ODF of the outwardly extending flange 20 is approximately 37.1 mm and the diameter DB of the bottom 18 is about 23.3 mm. The thickness of the aluminum capsule body 12 is 100 micrometer, but in other embodiments the thickness can be 20 to 200 micrometer.
In the shown embodiment the thickness of the aluminum cover 14 is 39 micrometer, although in other embodiments the thickness can be 15 to 65 micrometer, preferably 30 to 45 micrometer, and is preferably smaller than the thickness of the aluminum capsule body 12.
The side wall 16 of the aluminum capsule body 12 has a free end 42 opposite the bottom 18. The inner diameter IDF of the free end 42 of the side wall 16 of the aluminum capsule body 12 is about 29.5 mm. The outwardly extending flange 20 extends from that free end 42 in a direction at least substantially transverse to the central capsule body axis 12A. The outwardly extending flange 20 comprises a curled outer edge 43 which is beneficial for obtaining a seal between the capsule and the enclosing member. In the shown embodiment the curled outer edge 43 of the outwardly extending flange 20 has a largest dimension of about 1.2 millimeter. The distance DIF between the free end 42 of the side wall 16 of the aluminum capsule body 12 and an inner edge 43A of the curled outer edge 43 is about 2.7 mm, while the distance DOF between the free end 42 of the side wall 16 of the aluminum capsule body 12 and an outermost edge 43B of the outwardly extending flange 20 is about 3.8 millimeter.
As can be seen from Figure 3A the aluminum capsule body 12 is truncated. In the embodiment shown, the side wall 16 of the aluminum capsule body 12 encloses an angle A with a line transverse to the central capsule body axis 12A of about 97.5°. The bottom 18 of the aluminum capsule body 12 has a largest inner diameter DB of about 23.3 mm. The bottom 18 of the aluminum capsule body 12 is also truncated, and in the shown embodiment has a bottom height BH of about 4.0 mm. The bottom 18 further has a generally flat central portion 18A opposite the cover 14, which generally flat central portion 18A has a diameter DEE of about 8.3 mm and in which generally flat central portion 18A the entrance opening 25 is to be made. The total height TH of the aluminum capsule body 12 of the capsule is about 28.4 mm.
The system 1 shown in Fig. 1 is operated as follows for preparing a cup of potable coffee, wherein the substance is roasted and ground coffee.
The capsule 2 is placed in the enclosing member 6. The extraction plate 8 is brought into contact with the capsule 2. The bottom piercing means 24 pierce the bottom 18 of the capsule 2 for creating the entrance openings 25. The fluid, here hot water under pressure, is supplied to the extractable product in the inner space 22 through the entrance openings 25. The water will wet the coffee grounds and extract the desired substances to form the coffee beverage.
During supplying the water under pressure to the inner space 22, the pressure inside the capsule 2 will rise. The rise in pressure will cause the cover 14 to deform and be pressed against the lid piercing means 26 of the extraction plate. Once the pressure reaches a certain level, the tear strength of the cover 14 will be surpassed and the cover 14 will rupture against the lid piercing means 26, creating exit openings. The prepared coffee will drain from the capsule 2 through the exit openings and outlets 32 (see Fig. 1) of the extraction plate 8, and may be supplied to a container such as a cup (not shown).
The system 1 is arranged such that prior to or at the start of brewing, the free end 30 of the enclosing member 6 exerts a force Fl on the sealing member 28 of the capsule 2 to provide a fluid sealing contact between the outwardly extending flange 20 of the capsule 2 and the enclosing member 6 of the beverage preparation device, wherein Fl is in the range of 30-150 N preferably 40-150 N, more preferably 50-100 N, when the fluid pressure PI in the enclosing member 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 member 6 exerts a force F2 on the sealing member 28 of the capsule 2 to provide a fluid sealing contact between the outwardly extending flange 20 of the capsule 2 and the enclosing member 6, wherein the force F2 is in the range of 500 -1500 N, preferably in the range of 750-1250 N, when the fluid pressure P2 in the enclosing member 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 shown embodiment the free contact end of enclosing member 6 can move relative to the extracting plate 8 under the effect of the pressure of the fluid in the enclosing member 6 device towards the extraction plate 8 for applying the maximum force F2 between the outwardly extending flange 20 and the free end 30 of the enclosing member 6. This movement can take place during use, i.e. in particular at the start of brewing and during brewing. The enclosing member 6 has a first part 6A and a second part 6B wherein the second part comprises the free contact end 30. The second part 6B can move relative to the first part 6A between a first and second position. The second part 6B can move from the first positon towards the second position in the direction of the closing member 8 under the influence of fluid pressure in the enclosing member 6. The force Fl as discussed above may be reached if the second part 6B is in the first position with a fluid pressure PI. The force F2 as discussed above may be reached if the second part 6B is moved towards the second position under the influence of the fluid pressure P2 in the enclosing member 6.
As a result of the force applied the sealing member 28 of the capsule according to the invention undergoes a plastic deformation and closely conforms to the grooves 40 of the free contact end 30 and thus provides a fluid sealing contact between the enclosing member 6 and the capsule 3 at a relatively low fluid pressure during start up of brewing but also provides a fluid sealing contact at the much higher fluid pressure in the enclosing member outside the capsule during brewing. This close conformation to the grooves 40 of the enclosing member is indicated in Figure 3C which shows the capsule 2 of the invention after use, and which clearly indicates that the outwardly extending flange 20 comprises deformations 40’ which conform to the grooves 40 of the enclosing member.
In the foregoing specification, the invention has been described with reference to specific examples of embodiments of the invention. It will, however, be evident that various modifications and changes may be made therein without departing from the broader spirit and scope of the invention as set forth in the appended claims.

Claims (49)

1. Capsule bevattende een substantie voor de bereiding van een drinkbaar brouwsel door extractie en/of oplossing van de substantie door middel van het toevoeren van een fluïdum onder druk in de capsule, waarbij de capsule een aluminium capsulelichaam omvat met een centrale capsulelichaamsas, waarbij het aluminium capsulelichaam is voorzien van een bodem, een zijwand en een buitenwaarts uitstrekkende flens, waarbij de capsule verder een aluminium deksel omvat bevestigd aan de buitenwaarts uitstrekkende flens, waarbij het deksel de capsule hermetisch afsluit, waarbij de capsule verder een afdichtingsdeel omvat aan de buitenwaarts uitstrekkende flens voor het verschaffen van een fluïdum afdichtend contact met een omsluitingsdeel van een drankbereidingsinrichting als de capsule in het omsluitingsdeel van de drankbereidingsinrichting wordt geplaatst en het omsluitingsdeel door middel van een sluitingsdeel van de drankbereidingsinrichting, zoals een extractieplaat van de drankbereidingsinrichting, wordt gesloten, zodanig dat de buitenwaarts uitstrekkende flens van de capsule en ten minste een gedeelte van het afdichtingsdeel van de capsule afdichtend worden ingegrepen tussen het omsluitingsdeel en het sluitingsdeel van de drankbereidingsinrichting, waarbij het omsluitingsdeel van de drankbereidingsinrichting een ringvormig element omvat met een centrale ringvormig element as en een vrij contacteinde, waarbij het vrije contacteinde van het ringvormige element optioneel is voorzien van een meervoudig aantal radiaal uitstrekkende open groeven, met het kenmerk, dat het afdichtingsdeel is gevormd door de buitenwaarts uitstrekkende flens van het aluminium capsulelichaam, waarbij ten minste de buitenwaarts uitstrekkende flens van aluminium spons is gemaakt.A capsule containing a substance for the preparation of a drinkable brew by extraction and / or dissolution of the substance by supplying a pressurized fluid into the capsule, the capsule comprising an aluminum capsule body with a central capsule body axis, the aluminum capsule body includes a bottom, a side wall, and an outwardly extending flange, the capsule further comprising an aluminum lid attached to the outwardly extending flange, the lid hermetically sealing the capsule, the capsule further comprising a sealing portion on the outwardly extending flange for providing a fluid-sealing contact with an enclosure portion of a beverage preparation device when the capsule is placed in the enclosure portion of the beverage preparation device and the enclosure portion through a closure portion of the beverage preparation device, such as an extraction plate of the beverage preparation device closed, such that the outwardly extending flange of the capsule and at least a portion of the sealing portion of the capsule are sealingly engaged between the enclosure portion and the closure portion of the beverage preparation device, the enclosure portion of the beverage preparation device comprising an annular element having a central annular element shaft and a free contact end, wherein the free contact end of the annular element is optionally provided with a plurality of radially extending open grooves, characterized in that the sealing part is formed by the outwardly extending flange of the aluminum capsule body, wherein least the outwardly extending flange is made of aluminum sponge. 2. Capsule volgens conclusie 1, waarbij de capsule een extraheerbaar product omvat als substantie voor de bereiding van een drinkbaar brouwsel, waarbij het extraheerbare product bij voorkeur 5 - 20 gram, bij voorkeur 5 -10 gram, meer bij voorkeur 5 - 7 gram gebrande en gemalen koffie is.A capsule according to claim 1, wherein the capsule comprises an extractable product as a substance for the preparation of a drinkable brew, wherein the extractable product is preferably 5 - 20 grams, preferably 5 - 10 grams, more preferably 5 - 7 grams roasted. and ground coffee. 3. Capsule volgens conclusie 1 of 2, waarbij de buitendiameter van de buitenwaarts uitstrekkende flens van de capsule groter is dan de diameter van de bodem van de capsule.The capsule according to claim 1 or 2, wherein the outer diameter of the outwardly extending flange of the capsule is larger than the diameter of the bottom of the capsule. 4. Capsule volgens conclusie 3, waarbij de buitendiameter van de buitenwaarts uitstrekkende flens ongeveer 37,1 mm is en de diameter van de bodem van de capsule ongeveer 23,3 mm is.The capsule according to claim 3, wherein the outer diameter of the outwardly extending flange is approximately 37.1 mm and the diameter of the bottom of the capsule is approximately 23.3 mm. 5. Capsule volgens één der voorgaande conclusies, waarbij de dikte van het aluminium capsulelichaam zodanig is dat het gemakkelijk wordt vervormd als de capsule in het omsluitingsdeel van de drankbereidingsinrichting wordt geplaatst en het omsluitingsdeel door middel van een sluitingsdeel van de drankbereidingsinrichting wordt gesloten, waarbij de dikte van het aluminium capsulelichaam bij voorkeur 20 tot 200 micrometer is, bij voorkeur 100 micrometer.A capsule according to any one of the preceding claims, wherein the thickness of the aluminum capsule body is such that it is easily deformed when the capsule is placed in the enclosure part of the beverage preparation device and the enclosure part is closed by means of a closure part of the beverage preparation device, the thickness of the aluminum capsule body is preferably 20 to 200 microns, preferably 100 microns. 6. Capsule volgens één der voorgaande conclusies, waarbij de dikte van het aluminium deksel 15 tot 65 micrometer is, bij voorkeur 30 tot 45 micrometer, met de meeste voorkeur 39 micrometer.A capsule according to any one of the preceding claims, wherein the thickness of the aluminum lid is 15 to 65 microns, preferably 30 to 45 microns, most preferably 39 microns. 7. Capsule volgens één der voorgaande conclusies, waarbij de wanddikte van het aluminium deksel kleiner is dan de wanddikte van het aluminium capsulelichaam.A capsule according to any one of the preceding claims, wherein the wall thickness of the aluminum lid is smaller than the wall thickness of the aluminum capsule body. 8. Capsule volgens één der voorgaande conclusies, waarbij het aluminium deksel is ingericht om open te scheuren op een sluitingsdeel van de drankbereidingsinrichting, zoals een extractieplaat van de drankbereidingsinrichting onder invloed van fluïdumdruk in de capsule.A capsule according to any one of the preceding claims, wherein the aluminum lid is adapted to tear open on a closure part of the beverage preparation device, such as an extraction plate of the beverage preparation device under the influence of fluid pressure in the capsule. 9. Capsule volgens één der voorgaande conclusies, waarbij de zijwand van het aluminium capsulelichaam een vrij einde tegenover de bodem heeft, waarbij de buitenwaarts uitstrekkende flens zich vanaf het vrije einde van de zijwand in een richting ten minste hoofdzakelijk dwars op de centrale capsulelichaamsas uitstrekt.A capsule according to any one of the preceding claims, wherein the side wall of the aluminum capsule body has a free end opposite the bottom, the outwardly extending flange extending from the free end of the side wall in a direction at least substantially transversely of the central capsule body axis. 10. Capsule volgens conclusie 9, waarbij de buitenwaarts uitstrekkende flens een gekrulde buitenrand omvat.The capsule of claim 9, wherein the outwardly extending flange comprises a curled outer edge. 11. Capsule volgens conclusie 10, waarbij een binnenrand van de gekrulde buitenrand van de buitenwaarts uitstrekkende flens een straal rond de centrale capsulelichaamsas heeft van ten minste 32 mm.The capsule of claim 10, wherein an inner edge of the curled outer edge of the outwardly extending flange has a radius around the central capsule body axis of at least 32 mm. 12. Capsule volgens conclusie 10 of 11, waarbij de gekrulde buitenrand van de buitenwaarts uitstrekkende flens een grootste afmeting van ongeveer 1,2 mm heeft.The capsule according to claim 10 or 11, wherein the curled outer edge of the outwardly extending flange has a largest dimension of about 1.2 mm. 13. Capsule volgens één der conclusies 9 tot 12, waarbij de binnendiameter van het vrije einde van de zijwand van het aluminium capsulelichaam ongeveer 29,5 mm is.The capsule according to any of claims 9 to 12, wherein the inner diameter of the free end of the side wall of the aluminum capsule body is approximately 29.5 mm. 14. Capsule volgens één der conclusies 9 tot 13, waarbij de afstand tussen het vrije einde van de zijwand van het aluminium capsulelichaam en een buitenste rand van de buitenwaarts uitstrekkende flens ongeveer 3,8 mm is.The capsule of any one of claims 9 to 13, wherein the distance between the free end of the side wall of the aluminum capsule body and an outer edge of the outwardly extending flange is approximately 3.8 mm. 15. Capsule volgens één der voorgaande conclusies, waarbij een hoogte van het aluminium capsulelichaam ongeveer 28,4 mm is.A capsule according to any one of the preceding claims, wherein a height of the aluminum capsule body is approximately 28.4 mm. 16. Capsule volgens één der voorgaande conclusies, waarbij het aluminium capsulelichaam afgevlakt is, waarbij bij voorkeur de zijwand van het aluminium capsulelichaam een hoek insluit met een lijn dwars op de centrale capsulelichaamsas van ongeveer 97,5°.A capsule according to any one of the preceding claims, wherein the aluminum capsule body is flattened, the side wall of the aluminum capsule body preferably enclosing an angle with a line transverse to the central capsule body axis of about 97.5 °. 17. Capsule volgens één der voorgaande conclusies, waarbij de bodem van het aluminium capsulelichaam een grootste binnendiameter van ongeveer 23,3 mm heeft.A capsule according to any one of the preceding claims, wherein the bottom of the aluminum capsule body has a largest inner diameter of approximately 23.3 mm. 18. Capsule volgens conclusie 17, waarbij de bodem van het aluminium capsulelichaam afgevlakt is, bij voorkeur met een bodem hoogte van ongeveer 4,0 mm en waarbij de bodem verder een algemeen vlak centraal gedeelte tegenover het deksel heeft met een diameter van ongeveer 8,3 mm.The capsule according to claim 17, wherein the bottom of the aluminum capsule body is flattened, preferably with a bottom height of about 4.0 mm and wherein the bottom further has a generally flat central portion opposite the cover with a diameter of about 8, 3 mm. 19. Capsule volgens één der voorgaande conclusies, waarbij de capsule een binnenoppervlak omvat, en waarbij op het binnenoppervlak van tenminste de zijwand van de capsule een binnencoating is voorzien.A capsule according to any one of the preceding claims, wherein 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. 20. Capsule volgens conclusie 19, waarbij het aluminium deksel van de capsule aan de buitenwaarts uitstrekkende flens is bevestigd door middel van een afdichtende lak, waarbij de binnencoating is samengesteld uit hetzelfde materiaal als de afdichting lak.The capsule of claim 19, wherein the aluminum lid of the capsule is attached to the outwardly extending flange by means of a sealing lacquer, the inner coating being composed of the same material as the sealing lacquer. 21. Capsule volgens conclusie 19 of 20, waarbij het afdichtingsdeel vrij is van een binnencoating.The capsule according to claim 19 or 20, wherein the sealing member is free from an inner coating. 22. Capsule volgens één der voorgaande conclusies, waarbij de capsule een buitenoppervlak omvat, en waarbij op het buitenoppervlak van de capsule een kleurlak is voorzien.A capsule according to any one of the preceding claims, wherein the capsule comprises an outer surface, and wherein a color lacquer is provided on the outer surface of the capsule. 23. Capsule volgens conclusie 22, waarbij op een buitenoppervlak van de kleurlak een buitencoating is voorzien.The capsule according to claim 22, wherein an outer coating is provided on an outer surface of the color lacquer. 24. Capsule volgens één der conclusies 1 tot 21, waarbij op het buitenoppervlak van het afdichtingsdeel een buitencoating is voorzien en het buitenoppervlak van het afdichtingsdeel vrij is van een kleurlak.Capsule according to any of claims 1 to 21, wherein an outer coating is provided on the outer surface of the sealing part and the outer surface of the sealing part is free of a color lacquer. 25. Capsule volgens één der voorgaande conclusies, waarbij het gehele aluminium capsulelichaam gemaakt is van aluminium spons.The capsule according to any of the preceding claims, wherein the entire aluminum capsule body is made of aluminum sponge. 26. Capsule volgens één der voorgaande conclusies, waarbij de aluminium spons een porositeit in het bereik van 75 - 95 % omvat, bij voorkeur een porositeit van 80 - 85 %.A capsule according to any one of the preceding claims, wherein the aluminum sponge comprises a porosity in the range of 75 - 95%, preferably a porosity of 80 - 85%. 27. Capsule volgens één der voorgaande conclusies, waarbij de aluminium spons wordt geproduceerd door het mengen van T1H2 als schuimmiddel in gesmolten aluminium.A capsule according to any one of the preceding claims, wherein the aluminum sponge is produced by mixing T1H2 as a foaming agent in molten aluminum. 28. Capsule volgens één der voorgaande conclusies, waarbij de afdichtingstructuur vervormbaar is zodanig dat genoemde ondersteuning fluïdum afdichtend contact maakt met ten minste een gedeelte van het vrije contacteinde van het ringvormige element als, in gebruik, de maximale fluïdumdruk in het omsluitingsdeel van de drankbereidingsinrichting in het gebied van 6 - 20 bar is, bij voorkeur tussen 12 en 18 bar.A capsule according to any one of the preceding claims, wherein the sealing structure is deformable such that said support makes fluid sealing contact with at least a portion of the free contact end of the annular element as, in use, the maximum fluid pressure in the enclosure portion of the beverage preparation device. is in the range of 6-20 bar, preferably between 12 and 18 bar. 29. Capsule volgens één der voorgaande conclusies, waarbij de afdichtingstructuur vervormbaar is zodanig dat genoemde ondersteuning fluïdum af dichtend contact maakt met ten minste een gedeelte van het vrije contacteinde van het ringvormige element als, tijdens het brouwen, het vrije contacteinde van het ringvormige element een kracht F2 uitoefent op de afdichtingstructuur van de capsule, waarbij F2 in het bereik van 500 - 1500 N is, bij voorkeur in het bereik van 750 - 1250 N, wanneer de fluïdumdruk P2 in het omsluitingsdeel buiten de capsule in het bereik van 6 - 20 bar is, bij voorkeur tussen 12 en 18 bar.A capsule according to any one of the preceding claims, wherein the sealing structure is deformable such that said support makes fluid sealing contact with at least a portion of the free contact end of the annular element if, during brewing, the free contact end of the annular element exerts force F2 on the sealing structure of the capsule, where F2 is in the range of 500 - 1500 N, preferably in the range of 750 - 1250 N, when the fluid pressure P2 in the enclosure portion outside the capsule is in the range of 6 - 20 bar, preferably between 12 and 18 bar. 30. Capsule volgens één der voorgaande conclusies, waarbij de afdichtingstructuur vervormbaar is zodanig dat genoemde ondersteuning fluïdum afdichtend contact maakt met ten minste een gedeelte van het vrije contacteinde van het ringvormige element als, in gebruik, voor of bij het begin van het brouwen, het vrije contacteinde van het ringvormige element een kracht F1 op de afdichtingstructuur van de capsule uitoefent, waarbij de kracht F1 in het bereik van 30 - 150 N is, bij voorkeur 40 - 150 N en meer bij voorkeur 50 - 100 N, wanneer de fluïdumdruk PI in het omsluitingsdeel van de drankbereidingsinrichting buiten de capsule in het bereik van 0,1-4 bar is, bij voorkeur 0,1-1 bar.A capsule according to any one of the preceding claims, wherein the sealing structure is deformable such that said support makes fluid sealing contact with at least a portion of the free contact end of the annular element as, in use, before or at the start of brewing, the free contact end of the annular element exerts a force F1 on the sealing structure of the capsule, the force F1 being in the range of 30 - 150 N, preferably 40 - 150 N and more preferably 50 - 100 N, when the fluid pressure P1 in the enclosing part of the beverage preparation device outside the capsule is in the range of 0.1-4 bar, preferably 0.1-1 bar. 31. Capsule volgens één der voorgaande conclusies, waarbij de afdichtingstructuur vervormbaar is zodanig dat genoemde ondersteuning fluïdum afdichtend contact maakt met ten minste een gedeelte van het vrije contacteinde van het ringvormige element als het vrije contacteinde van het ringvormige element welke gedrukt is tegen de afdichtingstructuur een meervoudig aantal radiaal uitstrekkende groeven omvat gelijkmatig op afstand ten opzichte van elkaar verdeeld in omtrekszin van het vrije contacteinde van het ringvormige element.A capsule according to any one of the preceding claims, wherein the sealing structure is deformable such that said support makes fluid sealing contact with at least a portion of the free contact end of the annular element as the free contact end of the annular element which is pressed against the sealing structure. a plurality of radially extending grooves includes evenly spaced apart from each other in circumference of the free contact end of the annular member. 32. Capsule volgens één der voorgaande conclusies, waarbij de afdichtingstructuur vervormbaar is zodanig dat genoemde ondersteuning fluïdum af dichtend contact maakt met ten minste een gedeelte van het vrije contacteinde van het ringvormig element als de grootste breedte van elk van de groeven 0,9 - 1,1 mm is, bij voorkeur 0,95 - 1,05 mm, meer bij voorkeur 0,98 - 1,02 mm, waarbij een maximale hoogte van elk van de groeven in een axiale richting van het omsluitingsdeel van de drankbereidingsinrichting 0,01 - 0,09 mm is, bij voorkeur 0,03 - 0,07 mm, meer bij voorkeur 0,045 -0,055 mm en het meest bij voorkeur 0,05 mm en waarbij het aantal groeven 90 tot 110 is, bij voorkeur 96.A capsule according to any one of the preceding claims, wherein the sealing structure is deformable such that said support makes fluid sealing contact with at least a portion of the free contact end of the annular element as the largest width of each of the grooves 0.9 - 1 1 mm is preferably 0.95 - 1.05 mm, more preferably 0.98 - 1.02 mm, with a maximum height of each of the grooves in an axial direction of the enclosing part of the beverage preparation device 0.01 - 0.09 mm, preferably 0.03 - 0.07 mm, more preferably 0.045 - 0.05 mm and most preferably 0.05 mm and wherein the number of grooves is 90 to 110, preferably 96. 33. Capsule volgens één der voorgaande conclusies, waarbij de afdichtingstructuur en de rest van het capsulelichaam van hetzelfde plaatmateriaal zijn gemaakt.The capsule according to any of the preceding claims, wherein the sealing structure and the remainder of the capsule body are made of the same sheet material. 34. Systeem voor het bereiden van een drinkbaar brouwsel uit een capsule met gebruik van een onder druk toegevoerd fluïdum in de capsule, omvattende: een drankbereidingsinrichting bevattende een omsluitingsdeel voor het opnemen van de capsule, waarbij het omsluitingsdeel fluïdum toevoermiddelen omvat voor het toevoeren van fluïdum onder druk in de capsule, waarbij de drankbereidingsinrichting verder een sluitingsdeel omvat, zoals een extractieplaat, voor het sluiten van het omsluitingsdeel van de drankbereidingsinrichting, waarbij het omsluitingsdeel van de drankbereidingsinrichting verder een ringvormig element omvat met een centrale ringvormig element as en een vrij contacteinde, waarbij het vrije contacteinde van het ringvormige element optioneel is voorzien van een meervoudig aantal radiaal uitstrekkende open groeven; een capsule omvattende een substantie voor de bereiding van een drinkbaar brouwsel door extractie en/of oplossing van de substantie door middel van het fluïdum onder druk toegevoerd in de capsule door de fluïdum toevoermiddelen van de drankbereidingsinrichting, waarbij de capsule een aluminium capsulelichaam omvat met een centrale capsulelichaamsas, waarbij het aluminium capsulelichaam is voorzien van een bodem, een zijwand en een buitenwaarts uitstrekkende flens, waarbij de capsule verder een aluminium deksel omvat bevestigd aan de buitenwaarts uitstrekkende flens, waarbij het deksel de capsule hermetisch afsluit, waarbij de capsule verder een afdichtingsdeel omvat aan de buitenwaarts uitstrekkende flens voor het verschaffen van een fluïdum afdichtend contact met het omsluitingsdeel van de drankbereidingsinrichting als de capsule in het omsluitingsdeel van de drankbereidingsinrichting wordt geplaatst en het omsluitingsdeel door middel van het sluitingsdeel van de drankbereidingsinrichting wordt gesloten, zodanig dat de buitenwaarts uitstrekkende flens van de capsule en ten minste een gedeelte van het afdichtingsdeel van de capsule afdichtend worden ingegrepen tussen het omsluitingsdeel en het sluitingsdeel van de drankbereidingsinrichting, met het kenmerk, dat het afdichtingsdeel is gevormd door de buitenwaarts uitstrekkende flens van het aluminium capsulelichaam, waarbij ten minste de buitenwaarts uitstrekkende flens van aluminium spons is gemaakt.A system for preparing a drinkable brew from a capsule using a pressurized fluid in the capsule, comprising: a beverage preparation device comprising an enclosure portion for receiving the capsule, the enclosure portion comprising fluid supply means for supplying fluid under pressure in the capsule, wherein the beverage preparation device further comprises a closure part, such as an extraction plate, for closing the enclosure part of the beverage preparation device, the enclosure part of the beverage preparation device further comprising an annular element with a central annular element axis and a free contact end, wherein the free contact end of the annular element is optionally provided with a plurality of radially extending open grooves; a capsule comprising a substance for the preparation of a drinkable brew by extraction and / or dissolution of the substance by means of the fluid under pressure fed into the capsule by the fluid supply means of the beverage preparation device, the capsule comprising an aluminum capsule body with a central capsule body shaft, wherein the aluminum capsule body is provided with a bottom, a side wall and an outwardly extending flange, the capsule further comprising an aluminum cover attached to the outwardly extending flange, the cover hermetically sealing the capsule, the capsule further comprising a sealing part to the outwardly extending flange for providing a fluid-sealing contact with the enclosure portion of the beverage preparation device when the capsule is placed in the enclosure portion of the beverage preparation device and the enclosure portion by means of the closure portion of the beverage preparation device The gasket is closed such that the outwardly extending flange of the capsule and at least a portion of the sealing portion of the capsule are sealingly engaged between the enclosure portion and the closure portion of the beverage preparation device, characterized in that the sealing portion is formed by the outwardly extending flange of the aluminum capsule body, wherein at least the outwardly extending flange is made of aluminum sponge. 35. Systeem volgens conclusie 34, waarbij de capsule een capsule is volgens één der conclusies 2 tot 33.The system of claim 34, wherein the capsule is a capsule according to any of claims 2 to 33. 36. Systeem volgens conclusie 34 of 35, waarbij, in gebruik, de maximale fluïdumdruk in het omsluitingsdeel van de drankbereidingsinrichting in het bereik van 6 - 20 bar is, bij voorkeur tussen 12 en 18 bar.A system according to claim 34 or 35, wherein, in use, the maximum fluid pressure in the enclosure portion of the beverage preparation device is in the range of 6-20 bar, preferably between 12 and 18 bar. 37. Systeem volgens één der conclusies 34 tot 36, waarbij het systeem zodanig is ingericht dat, in gebruik, tijdens het brouwen, een vrije einde van het omsluitingsdeel van de drankbereidingsinrichting een kracht F2 uitoefent op het afdichtingsdeel van de capsule om een fluïdum afdichtend contact te verschaffen tussen de buitenwaarts uitstrekkende flens van de capsule en het omsluitingsdeel van de drankbereidingsinrichting, waarbij F2 in het bereik van 500 - 1500 N is, bij voorkeur in het bereik van 750 -1250 N wanneer de fluïdumdruk P2 in het omsluitingsdeel van de drankbereidingsinrichting buiten de capsule in het bereik van 6 - 20 bar is, bij voorkeur tussen 12 en 18 bar.A system according to any of claims 34 to 36, wherein the system is arranged such that, in use, during brewing, a free end of the enclosing part of the beverage preparation device exerts a force F2 on the sealing part of the capsule about a fluid-sealing contact to be provided between the outwardly extending flange of the capsule and the enclosure portion 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 fluid pressure P2 in the enclosure portion of the beverage preparation device is outside the capsule is in the range of 6-20 bar, preferably between 12 and 18 bar. 38. Systeem volgens één der conclusies 34 tot 37, waarbij het systeem zodanig is ingericht dat, in gebruik, voor of bij het begin van het brouwen, een vrije einde van het omsluitingsdeel van de drankbereidingsinrichting een kracht F1 uitoefent op het afdichtingsdeel van de capsule om een fluïdum afdichtend contact te verschaffen tussen de buitenwaarts uitstrekkende flens van de capsule en het omsluitingsdeel van de drankbereidingsinrichting, waarbij F1 in het bereik van 30 - 150 N is, bij voorkeur 40 - 150 N, meer bij voorkeur 50 - 100 N, wanneer de fluïdumdruk PI in het omsluitingsdeel van de drankbereidingsinrichting buiten de capsule in het bereik van 0,1-4 bar is, bij voorkeur 0,1-1 bar.A system according to any one of claims 34 to 37, wherein the system is arranged such that, in use, before or at the start of brewing, a free end of the enclosing part of the beverage preparation device exerts a force F1 on the sealing part of the capsule to provide a fluid-sealing contact between the outwardly extending flange of the capsule and the enclosure portion 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 fluid pressure P1 in the enclosure portion of the beverage preparation device outside the capsule is in the range of 0.1-4 bar, preferably 0.1-1 bar. 39. Systeem volgens één der conclusies 34 tot 38, waarbij het meervoudig aantal radiaal uitstrekkende open groeven gelijkmatig op afstand ten opzichte van elkaar verdeeld zijn in tangentiële richting van het vrije contacteinde van het ringvormige element van de drankbereidingsinrichting.The system of any one of claims 34 to 38, wherein the plurality of radially extending open grooves are evenly spaced apart from one another in tangential direction of the free contact end of the annular element of the beverage preparation device. 40. Systeem volgens conclusie 39, waarbij de grootste breedte van elke groef 0,9 - 1,1 mm is, bij voorkeur 0,95 - 1,05 mm, meer bij voorkeur 0,98 -1,02 mm, waarbij een maximale hoogte van elke groef in een axiale richting van het omsluitingsdeel van de drankbereidingsinrichting 0,01 - 0,09 mm is, bij voorkeur 0,03 - 0,07 mm, met meer voorkeur 0,045 - 0,055 mm, en het meest bij voorkeur 0,05 mm, en waarbij het aantal groeven 90 - 110 is, bij voorkeur 96 en waarbij optioneel de radiale breedte van het vrije contacteinde ter plaatse van de groeven 0,05 - 0,9 mm is, bij voorkeur 0,2 -0,7 mm en meer bij voorkeur 0,3 - 0,55 mm.The system of claim 39, wherein the largest width of each groove is 0.9 - 1.1 mm, preferably 0.95 - 1.05 mm, more preferably 0.98 -1.02 mm, wherein a maximum height of each groove in an axial direction of the enclosing part of the beverage preparation device 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, and wherein the number of grooves is 90 - 110, preferably 96 and wherein optionally the radial width of the free contact end at the grooves is 0.05 - 0.9 mm, preferably 0.2 - 0.7 mm and more preferably 0.3 - 0.55 mm. 41. Systeem volgens een van de conclusies 36 tot 40, waarbij tijdens gebruik wanneer het sluitingsdeel van de drankbereidingsinrichting het omsluitingsdeel van de drankbereidingsinrichting sluit, ten minste het vrije contacteinde van het omsluitingsdeel van de drankbereidingsinrichting kan bewegen ten opzichte van het sluitingsdeel van de drankbereidingsinrichting onder invloed van de druk van het fluïdum in het omsluitingsdeel van de drankbereidingsinrichting naar het sluitingsdeel van de drankbereidingsinrichting toe voor het toepassen van de maximale kracht tussen de flens van de capsule en het vrije einde van het omsluitingsdeel van de drankbereidingsinrichting, waarbij optioneel het omsluitingsdeel een eerste deel en een tweede deel omvat, waarbij het tweede deel het vrije contacteinde van het omsluitingsdeel omvat, waarbij het tweede deel kan bewegen ten opzichte van het eerste deel tussen een eerste en tweede stand, waarbij het tweede deel kan bewegen van de eerste stand naar de tweede stand toe in de richting van het sluitingsdeel onder invloed van fluïdumdruk in het omsluitingsdeel waarbij optioneel de kracht F1 volgens conclusie 38 wordt bereikt als het tweede deel in de eerste stand is met een fluïdumdruk PI in het omsluitingsdeel zoals vermeld in conclusie 38 en waarbij optioneel de kracht F2 volgens conclusie 37 wordt bereikt als het tweede deel naar de tweede stand wordt bewogen onder invloed van de fluïdumdruk P2 in het omsluitingsdeel zoals vermeld in conclusie 37.A system according to any of claims 36 to 40, wherein during use when the closure part of the beverage preparation device closes the enclosure part of the beverage preparation device, at least the free contact end of the enclosure part of the beverage preparation device can move relative to the closure part of the beverage preparation device below influence of the pressure of the fluid in the enclosure part of the beverage preparation device towards the closure part of the beverage preparation device for applying the maximum force between the flange of the capsule and the free end of the enclosure part of the beverage preparation device, optionally the enclosure part having a first part and a second part, wherein the second part comprises the free contact end of the enclosing part, wherein the second part can move with respect to the first part between a first and second position, wherein the second part can move from the first position to the the second position in the direction of the closure part under the influence of fluid pressure in the enclosure part with optionally the force F1 according to claim 38 being achieved if the second part is in the first position with a fluid pressure P1 in the enclosure part as stated in claim 38 and wherein optionally the force F2 according to claim 37 is achieved when the second part is moved to the second position under the influence of the fluid pressure P2 in the enclosing part as stated in claim 37. 42. Systeem volgens conclusie 40 of 41, waarbij het fluïdum afdichtende contact zodanig is dat het een afdichting verschaft onder dergelijke gebruiksomstandigheden.The system of claim 40 or 41, wherein the fluid sealing contact is such that it provides a seal under such conditions of use. 43. Gebruik van een capsule volgens een der conclusies 1 tot 33 in een drankbereidingsinrichting omvattende een omsluitingsdeel voor het opnemen van de capsule, waarbij het omsluitingsdeel fluïdum toevoermiddelen omvat voor het toevoeren van fluïdum onder druk in de capsule, waarbij de drankbereidingsinrichting verder een sluitingsdeel omvat, zoals een extractieplaat, voor het sluiten van het omsluitingsdeel van de drankbereidingsinrichting, waarbij het omsluitingsdeel van de drankbereidingsinrichting verder een ringvormig element omvat met een centrale ringvormig element as en een vrij contacteinde, waarbij het vrije contacteinde van het ringvormige element optioneel is voorzien van een meervoudig aantal radiale groeven; waarbij de capsule een substantie omvat voor de bereiding van een drinkbaar brouwsel door extractie en/of oplossing van de substantie door middel van het fluïdum onder druk toegevoerd in de capsule door de fluïdum toevoermiddelen van de drankbereidingsinrichting, waarbij de capsule een aluminium capsulelichaam omvat met een centrale capsulelichaamsas, waarbij het aluminium capsulelichaam is voorzien van een bodem, een zijwand en een buitenwaarts uitstrekkende flens, waarbij de capsule verder een aluminium deksel omvat bevestigd aan de buitenwaarts uitstrekkende flens, waarbij het deksel de capsule hermetisch afsluit, waarbij de capsule verder een afdichtingsdeel omvat op de buitenwaarts uitstrekkende flens voor het verschaffen van een fluïdum afdichtend contact met het omsluitingsdeel van de drankbereidingsinrichting als de capsule in het omsluitingsdeel van de drankbereidingsinrichting wordt geplaatst en het omsluitingsdeel door middel van het sluitingsdeel van de drankbereidingsinrichting wordt gesloten, zodanig dat de buitenwaarts uitstrekkende flens van de capsule en ten minste een gedeelte van het afdichtingsdeel van de capsule afdichtend worden ingegrepen tussen het omsluitingsdeel en het sluitingsdeel van de drankbereidingsinrichting.Use of a capsule according to any one of claims 1 to 33 in a beverage preparation device comprising an enclosure part for receiving the capsule, the enclosure part comprising fluid supply means for supplying fluid under pressure into the capsule, the beverage preparation device further comprising a closure part , such as an extraction plate, for closing the enclosure portion of the beverage preparation device, wherein the enclosure portion of the beverage preparation device further comprises an annular element with a central annular element shaft and a free contact end, the free contact end of the annular element optionally comprising a multiple number of radial grooves; wherein the capsule comprises a substance for the preparation of a drinkable brew by extraction and / or dissolution of the substance by means of the fluid under pressure fed into the capsule by the fluid supply means of the beverage preparation device, the capsule comprising an aluminum capsule body with a central capsule body axis, wherein the aluminum capsule body is provided with a bottom, a side wall and an outwardly extending flange, the capsule further comprising an aluminum cover attached to the outwardly extending flange, the cover hermetically sealing the capsule, the capsule further comprising a sealing part comprises on the outwardly extending flange for providing a fluid-sealing contact with the enclosure portion of the beverage preparation device when the capsule is placed in the enclosure portion of the beverage preparation device and the enclosure portion by means of the closure portion of the beverage preparation device is closed such that the outwardly extending flange of the capsule and at least a portion of the sealing portion of the capsule are sealingly engaged between the enclosure portion and the closure portion of the beverage preparation device. 44. Gebruik volgens conclusie 43, waarbij, in gebruik, de maximale fluïdumdruk in het omsluitingsdeel van de drankbereidingsinrichting in het bereik van 6 - 20 bar is, bij voorkeur tussen 12 en 18 bar.The use of claim 43, wherein, in use, the maximum fluid pressure in the enclosure portion of the beverage preparation device is in the range of 6-20 bar, preferably between 12 and 18 bar. 45. Gebruik volgens conclusie 43 of 44, waarbij, in gebruik, tijdens het brouwen, een vrij einde van het omsluitingsdeel van de drankbereidingsinrichting een kracht F2 uitoefent op het afdichtingsdeel van de capsule om een fluïdum afdichtend contact te voorzien tussen de buitenwaarts uitstrekkende flens van de capsule en het omsluitingsdeel van de drankbereidingsinrichting, waarbij F2 in het bereik van 500 - 1500 N is, bij voorkeur in het bereik van 750 - 1250 N wanneer de fluïdumdruk P2 in het omsluitingsdeel van de drankbereidingsinrichting buiten de capsule in het bereik van 6 - 20 bar is, bij voorkeur tussen 12 en 18 bar en waarbij het fluïdum afdichtende contact bestaat.The use of claim 43 or 44, wherein, in use, during brewing, a free end of the enclosing portion of the beverage preparation device exerts a force F2 on the sealing portion of the capsule to provide a fluid-sealing contact between the outwardly extending flange of the capsule and the enclosure portion 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 fluid pressure P2 in the enclosure portion of the beverage preparation device is outside the capsule in the range of 6 - Is 20 bar, preferably between 12 and 18 bar, and wherein the fluid sealing contact exists. 46. Gebruik volgens één der conclusies 43-45, waarbij in gebruik, voor of bij het begin van het brouwen, een vrij einde van het omsluitingsdeel van de drankbereidingsinrichting een kracht F1 uitoefent op het afdichtingsdeel van de capsule voor het verschaffen van een fluïdum afdichtend contact tussen de buitenwaarts uitstrekkende flens van de capsule en het omsluitingsdeel van de drankbereidingsinrichting, waarbij Fl in het bereik van 30 - 150 N is, bij voorkeur 40 - 150 N, met meer voorkeur 50 - 100 N, wanneer de fluïdumdruk PI in het omsluitingsdeel van de drankbereidingsinrichting buiten de capsule in het bereik van 0,1-4 bar is, bij voorkeur 0,1-1 bar en waarbij het fluïdum af dichtende contact bestaat.The use according to any of claims 43-45, wherein in use, before or at the start of brewing, a free end of the enclosure portion of the beverage preparation device exerts a force F1 on the sealing portion of the capsule to provide a fluid-sealing contact between the outwardly extending flange of the capsule and the enclosure portion of the beverage preparation device, where F1 is in the range of 30 - 150 N, preferably 40 - 150 N, more preferably 50 - 100 N, when the fluid pressure P1 in the enclosure portion of the beverage preparation device outside the capsule is in the range of 0.1-4 bar, preferably 0.1-1 bar, and wherein the fluid sealing contact exists. 47. Gebruik volgens één der conclusies 43-45, waarbij het meervoudig aantal radiaal uitstrekkende open groeven gelijkmatig op afstand ten opzichte van elkaar verdeeld zijn in tangentiële richting van het vrije contacteinde van het ringvormige element van de drankbereidingsinrichting.The use according to any of claims 43-45, wherein the plurality of radially extending open grooves are evenly spaced apart from one another in tangential direction of the free contact end of the annular element of the beverage preparation device. 48. Capsule volgens één der conclusies 1 tot 33, waarbij enkel de buitenwaarts uitstrekkende flens gemaakt is van aluminium spons.The capsule of any one of claims 1 to 33, wherein only the outwardly extending flange is made of aluminum sponge. 49. Systeem volgens één der conclusies 34 tot 42, waarbij de fluïdum toevoermiddelen ingericht zijn voor het toevoeren van een fluïdumstroom in het bereik van 0,5-2 ml/s, waarbij het fluïdum afdichtende contact voorzien door het afdichtingsdeel een lekkage percentage van minder dan 4% voorziet, bij voorkeur minder dan 2,5% van de stroom.A system according to any one of claims 34 to 42, wherein the fluid supply means are adapted to supply a fluid flow in the range of 0.5-2 ml / s, wherein the fluid-sealing contact provided by the sealing part has a leakage percentage of less than 4%, preferably less than 2.5% of the current.
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