Capsule, system and method for preparing a predetermined quantity of beverage suitable for consumption

Abstract

A capsule for preparing a predetermined quantity of beverage with a beverage brewing device is disclosed. The beverage brewing device comprises a receptacle for receiving the capsule. The capsule comprises a cup comprising a circumferential wall, a bottom closing the circumferential wall at a first end, and a lid in use connected to the cup at a second end of the circumferential wall opposite the bottom. The wall, bottom and lid, in use, enclose an inner space comprising the extractable product. At least a portion of a surface of the capsule conceived to, in use, interact with the receptacle is provided with at least one projection for forming a sealing engagement with the receptacle.

Claims

1. A capsule for preparing a predetermined quantity of a beverage suitable for consumption using an extractable product, by means of a beverage brewing device comprising a receptacle for receiving the capsule, the capsule comprising: a cup comprising a circumferential wall, a bottom closing the circumferential wall at a first end, and a lid in use connected to the cup at a second end of the circumferential wall opposite the bottom, wherein the wall, bottom and lid, in use, enclose an inner space comprising the extractable product, and wherein at least a portion of a surface of the capsule configured to, in use, interact with the receptacle is provided with at least one projection for forming a sealing engagement with the receptacle wherein the at least one projection comprises a plurality of interconnected tubular structures.

2. The capsule of claim 1, wherein the cup further comprises a flange-like rim extending outwardly of the circumferential wall at the second end, wherein the at least one projection is provided on the flange-like rim.

3. The capsule of claim 1, wherein the at least one projection is circumferential with respect to the capsule.

4. The capsule of claim 1, wherein the at least one projection is provided on separate regions along a periphery of the capsule.

5. The capsule of claim 1, wherein a height of the at least one projection is modulated.

6. The capsule of claim 1, wherein the plurality of interconnected tubular structures comprises polygonal structures.

7. The capsule of claim 1, wherein the at least one projection is flexible.

8. The capsule of claim 7, wherein the at least one projection is elastically deformable.

9. The capsule of claim 1, wherein the at least one projection is plastically deformable.

10. The capsule of claim 1, wherein the projection is made of the same material as the cup.

11. The capsule of claim 1, wherein the projection is integral with the cup.

12. The capsule of claim 1, wherein the capsule further comprises a ridge which is substantially concentrically enveloping the at least one projection, wherein a height of the ridge is different from the height of the at least one projection.

13. The capsule of claim 12, wherein the height of the ridge is larger than the height of the at least one projection.

14. The capsule of claim 12, wherein the ridge comprises a conical section on an inner circumferential surface thereof.

15. The capsule of claim 1, wherein the inner space is at least partially filled with the extractable product.

16. The capsule of claim 15, wherein the capsule is hermetically closed.

17. The capsule of claim 15, wherein the lid and/or bottom is porous and/or comprises openings for allowing a liquid to enter and/or exit the inner space.

18. The capsule of claim 1, wherein the capsule is disposable.

19. A capsule and beverage brewing device for preparing a predetermined quantity of beverage suitable for consumption using an extractable product, comprising: the capsule of claim 1; and a beverage brewing device comprising a receptacle for interacting with the capsule, wherein, in use, the at least one projection abuts against at least a portion of the receptacle such that a sealing engagement between the capsule and the receptacle is formed.

20. The capsule and beverage brewing device of claim 19, wherein the receptacle is provided in a form of an enclosing member.

21. The capsule and beverage brewing device of claim 20 wherein the capsule further comprises a ridge which is substantially concentrically enveloping the at least one projection, wherein a height of the ridge is different from the height of the at least one projection, and wherein the ridge is arranged to abut against an outer circumferential surface of the enclosing member.

22. The capsule and beverage brewing device of claim 20, wherein the inner space is at least partially filled with the extractable product, and wherein the capsule is enclosed in the enclosing member such that the at least one projection abuts against at least the portion of the enclosing member, such that a sealing engagement between the capsule and the enclosing member is formed.

23. A method of preparing a predetermined quantity of a beverage suitable for consumption using an extractable product, comprising the steps of: providing the capsule of claim 1, wherein the inner space is at least partially filled with the extractable product; providing a beverage brewing device comprising a receptacle for interacting with the capsule; positioning the capsule in the receptacle such that at least one of the projections contacts at least a portion of the receptacle for forming a sealing engagement between the capsule and the receptacle; providing a fluid to the inner space of the capsule for preparing the beverage; draining the beverage from the capsule.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The invention will now be further elucidated by means of, non-limiting, examples referring to the drawing, in which

(2) FIG. 1 shows a schematic representation of a first example of a system according to the invention.

(3) FIG. 2 presents a schematic view of an embodiment of a capsule according to an aspect of the invention.

(4) FIG. 3 presents a schematic view of an embodiment of a capsule according to an aspect of the invention.

(5) FIG. 4 presents a schematic view of an embodiment of a capsule according to an aspect of the invention;

(6) FIG. 5 presents a schematic view of an embodiment of a capsule according to an aspect of the invention.

(7) FIG. 6 presents a schematic view of an embodiment of a capsule according to an aspect of the invention.

(8) FIG. 7 shows a schematic representation of a second example of a system according to the invention;

(9) FIG. 8a shows an enlarged detail of a part of the system according to the invention;

(10) FIG. 8b shows an enlarged detail of a part of the system according to the invention;

(11) FIG. 9 shows an enlarged detail of a part of the system according to the invention;

(12) FIG. 10a shows a schematic representation of a further example of a system according to the invention; and

(13) FIG. 10b shows a schematic representation of an even further example of a system according to the invention.

(14) FIG. 11 presents in a schematic way an embodiment of a further example of a capsule according to the invention.

(15) FIG. 12 presents in a schematic way an embodiment of a still further example of a capsule according to the invention.

(16) FIG. 13 presents in a schematic way a top view of an embodiment of a circumferential projection.

DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS

(17) FIG. 1 shows a schematic representation, in cross sectional view, of a first example of a system 1 for preparing a predetermined quantity of beverage suitable for consumption using an extractable product. The system 1 comprises an exchangeable capsule 2, and a beverage brewing device 4. The device 4 comprises a receptacle in the form of an enclosing member 6 for holding the exchangeable capsule 2. In this example, the device 4 further comprises a support member 8 for supporting the capsule 2.

(18) In FIG. 1 a gap is drawn between the capsule 2, the enclosing member 6 and the support member 8 for clarity. It will be appreciated that, in use, the capsule 2 may lie in contact with the enclosing member 6 and the support 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 dispensing device 10 for supplying an amount of a fluid, such as water, under a pressure, of e.g. 9 bars, to the exchangeable capsule 2.

(19) In the example shown in FIG. 1, the exchangeable capsule 2 comprises a cup 12 and a lid 14. In this example, the cup 12 comprises a circumferential wall 16, a bottom 18 closing the circumferential wall 16 at a first end, and a flange-like rim 20 extending outwardly of the circumferential wall 16 at a second end opposite the bottom 18 wall. The circumferential wall 16, the bottom 18 and the lid 14 enclose an inner space 22 comprising the extractable product. In this example, the capsule is initially sealed, i.e. is hermetically closed prior to use.

(20) 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.

(21) The system 1 of FIG. 1 further comprises lid piercing means 26, here embodied as protrusions of the support member 8, for piercing the lid 14 of the capsule 2. The lid piercing means 26 may be arranged to tear the lid 14 once a (fluid) pressure inside the inner space 22 exceeds a threshold pressure and presses the lid 14 against the lid piercing means 26 with sufficient force. The lid 14 may e.g. comprise a tearable foil, e.g. made of aluminium.

(22) In this example, the cup 12 further comprises a plurality of projections in the form of substantially concentric circumferential ridges 28.i (i=1,2,3). In this example, the ridges 28.i are arranged on the flange-like rim 20. Here the ridges 28.i are arranged on the side of the flange-like rim 20 facing away from the lid 14. More generally put, the ridges 28.i extend outwardly of the cup 12. In this example the ridges 28.i are made of the same material as the cup 12. In this example, the ridges 28.i are integral with the cup 12.

(23) As can be seen from FIG. 1, in use the ridges 28.i may abut against a leading edge 30 of the enclosing member 6. When in this example at least one ridge 28.i abuts against at least a portion of the leading edge 30 of the enclosing member 6, a sealing engagement is obtained between the enclosing member 6 and the capsule 2 at the location where the at least one ridge 28.i abuts against at least the portion of the leading edge 30 of the enclosing member 6.

(24) The system 1 shown in FIG. 1 is operated as follows for preparing a cup of coffee, wherein the extractable product is roasted and ground coffee.

(25) The capsule 2 is placed in the enclosing member 6. The support member 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.

(26) 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 lid 14 to deform and be pressed against the lid piercing means 26. Once the pressure reaches a certain level, the tear strength of the lid 14 will be surpassed and the lid 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 of the support member 8, and may be supplied to a container such as a cup (not shown).

(27) FIG. 2 presents a schematic view of another embodiment of a capsule according to an aspect of the invention. In this figure a schematic vertical cross-section of a portion of the capsule is shown. The capsule 110 comprises a wall 102 having an inner surface 102b conceived to define at least a portion of the inner space I for accommodating the extractable product. The outer surface 102a of the capsule may be orthogonally or obliquely arranged with respect to the flange-like rim 104. The flange-like rim 104 comprises an upper surface 104a conceived to undergo interaction with a surface 109 of a receptacle 108 of the beverage brewing device. The flange-like rim 104 may have a substantially flat portion between the base of the wall 102a and a terminal ring 106. The terminal ring 106 may be provided to centre the receptacle 108 with respect to the capsule. It will be appreciated that the receptacle 108 may be shaped to receive the capsule 110 so that the portion 108 substantially envelopes it.

(28) In accordance with an aspect of the invention in order to form a sealing engagement between the capsule 110 and the surface 109 of the receptacle in use, a portion of the surface 104a is provided with a projection 107. It will be appreciated that the projection 107 may be arranged substantially anywhere along width L of the flange-like rim. Also the way the projection 107 is used for forming a sealing engagement may be different.

(29) First, the projection 107 may be arranged in an area wherein the wall 102 intercepts the flange-like rim 104 so that the surface 109 substantially abuts the projection 107. This has an advantage that the projection may be slightly compressed so that local surface irregularities of the receptacle 108 are mitigated. For example, when for the projection a material is selected capable of retaining fluid, microscopic leakages from the rim-receptacle interface may be counteracted.

(30) Secondly, the projection 107, for example the sponge-like body, may be arranged close to the outer ring 106 so that it may next to abutting the surface 109 of the receptacle also engage with a vertical outer surface of it. In this case the sponge-like projection may provide an improved sealing engagement as the outermost surface of the receptacle 108 may be at least partially enveloped by the sponge-like body 107.

(31) FIG. 3 presents a schematic view of an embodiment of a capsule according to an aspect of the invention, wherein geometry of the capsule 120 and of the receptacle 108 are substantially the same as discussed with reference to FIG. 2.

(32) In this particular embodiment the projection comprises a plurality of individual elongated members 117, wherein the individual elongated members may have the same height or may have different heights h1, h2. It will be appreciated that various embodiments of the individual elongated members are envisaged. First, the members may be provided as a brush-like structure, which may be adhered to the surface 104a using a suitable adhesive. The individual members may be manufactured from plastic, synthetic hair or the like. The individual members may e.g. be made of the same material as the cup 102, 104, 106. The individual members may e.g. be integral with the cup, e.g., by injection moulding of the cup and the members simultaneously. The projection 117 may be provided as a circumferential structure along a periphery of the capsule's rim. Preferably, the circumferential structure is concentric with a rotational axis of the capsule (not shown). Also, more than one circumferentially arranged projections 117 may be provided. For example, one circumferential projection may be provided at or near a rim-wall interface and a second circumferential projection may be provided at a rim/ring interface thereby providing a second barrier for possible microscopic leakages. Additionally or alternatively, the projection 117 may be provided as a number of isolated islands along the surface 104a. Such islands may be provided in a two-dimensional pattern, e.g. a chequered pattern, or they may be provided along other suitable pattern. In the example of FIG. 3, the individual members are drawn as being straight. It will be appreciated that tit is also possible that the individual members are curved or curled. It will be appreciated that the members may be intertwined e.g. forming a fleece-like structure. Such fleece-like structure may be injection moulded together with the cup.

(33) FIG. 4 presents a schematic view of an embodiment of a capsule according to an aspect of the invention, wherein geometry of the capsule 130 and of the receptacle 108 are substantially the same as discussed with reference to FIG. 2.

(34) In this particular embodiment the at least one projection comprises a textured material 127, which may be provided anywhere along width L of the surface 104a. Also in this case the projection 127 may be provided as one or more circumferential structures or as individual regions. The material 127 preferably comprises depressions and projections. Preferably, a height difference between adjacent depressions and projections is at least about 0.5 mm.

(35) FIG. 5 presents a schematic view of an embodiment of a capsule according to an aspect of the invention, wherein geometry of the capsule 140b and of the receptacle 108 are substantially the same as discussed with reference to FIG. 2.

(36) In a top view 140a a capsule portion is depicted wherein on the surface 104a between the ring 106 and the wall 102a a projection is provided comprising a number of interconnected tubular structures. Although in this particular example honeycomb tubular structures are shown any cross-sectional shape is possible. A polygonal cross-section may be preferred as any tubular structure is connected to a plurality of adjacent tubular structures increasing flexibility of such projection in a vertical direction V.

(37) The tubular structure may be provided along a circumference of the surface 104a, or it may be provided at selected regions. The projection comprising hollow tubular bodies may have an advantage that these bodies may easily be compressed by the receptacle (not shown) for forming the sealing engagement. Inner volume of the tubular bodies may be used as microscopic vessels for receiving fluid escaping from the sealing engagement, which may further improve the sealing engagement.

(38) FIG. 6 presents a schematic view of an embodiment of a capsule according to an aspect of the invention, wherein geometry of the capsule 150 and of the receptacle 108 are substantially the same as discussed with reference to FIG. 2.

(39) In this particular embodiment the at least one projection is provided as a bridge between the surface 104a and the wall 102a. Preferably a plurality of bridges 147a, 147b, 147c, . . . , 147n are provided. It will be appreciated that the bridge structure may be provided as an oblique link having a base portion 153 on the surface 104a and end portions terminating on the wall 102a. Alternatively, the bridge may be provided as a triangular or prismatic filling between the surface 104a and the wall 102a. In both cases the bridge may have two or more bifurcations 151, 152 having the same base and splitting and the wall 102a. It will further be appreciated that although the base portion 153 is schematically depicted to be arranged near the rim/wall interface, it may be positioned substantially distanced from said interface. Also, it is possible, that different isolated bridge structures have differently positioned base portions. Alternatively, it is possible that a one circumferentially arranged bridge structure is provided connecting the rim surface 104a and the wall 102.

(40) FIG. 7 shows a schematic representation, in cross sectional view, of a second example of a system 1 discussed with reference to FIG. 1 for preparing a predetermined quantity of beverage suitable for consumption using an extractable product. The system 1 comprises an exchangeable capsule 2, and a beverage brewing device 4. The device 4 comprises a receptacle, here enclosing member 6, for holding the exchangeable capsule 2. In this example, the device 4 further comprises a support member 8 for supporting the capsule 2.

(41) In FIG. 7 a gap is drawn between the capsule 2, the enclosing member 6 and the support member 8 for clarity. It will be appreciated that, in use, the capsule 2 may lie in contact with the enclosing member 6 and the support 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 dispensing device 10 for supplying an amount of a fluid, such as water, under a pressure, of e.g. 9 bars, to the exchangeable capsule 2.

(42) In the example shown in FIG. 7, the exchangeable capsule 2 comprises a cup 12 and a lid 14. In this example, the cup 12 comprises a circumferential wall 16, a bottom 18 closing the circumferential wall 16 at a first end, and a flange-like rim 20 extending outwardly of the circumferential wall 16 at a second end opposite the bottom 18 wall. The circumferential wall 16, the bottom 18 and the lid 14 enclose an inner space 22 comprising the extractable product. In this example, the capsule is initially open. Hence, the capsule 2 comprises pre-made entrance openings 25. The entrance openings 25 may be through holes in the bottom 18. Further, the capsule 2 comprises premade exit openings 27. The exit holes 27 may be through holes in a foil-like lid 14, e.g. manufactured from plastics material, or may be pores in a porous lid, e.g. manufactured from a non-woven material such as filter paper.

(43) The system 1 of FIG. 7 does not comprise bottom piercing means nor lid piercing means 26.

(44) In this example, the cup 12 further comprises a plurality of substantially concentric circumferential ridges 28.i (i=1,2,3, . . . ). In this example, the ridges 28.i are arranged on the flange-like rim 20. Here the ridges 28.i are arranged on the side of the flange-like rim 20 facing away from the lid 14. More generally put, the ridges 28.i extend outwardly of the cup 12. In this example the ridges 28.i are made of the same material as the cup 12. In this example, the ridges 28.i are integral with the cup 12.

(45) As can be seen from FIG. 7, in use the ridges 28.i may abut against a leading edge 30 of the enclosing member 6. When in this example at least one ridge 28.i abuts against at least a portion of the leading edge 30 of the enclosing member 6, a sealing engagement is obtained between the enclosing member 6 and the capsule 2 at the location where the at least one ridge 28.i abuts against at least the portion of the leading edge 30 of the enclosing member 6.

(46) The system 1 shown in FIG. 7 is operated as follows for preparing a cup of coffee, wherein the extractable product is roasted and ground coffee.

(47) The capsule 2 is placed in the enclosing member 6. The support member 8 is brought into contact with the capsule 2. The fluid, here hot water under pressure, is supplied to the extractable product in the inner space 22 through the entrance opening 25. The water will wet the coffee grounds and extract the desired substances to form the coffee beverage.

(48) During supplying the water under pressure to the inner space 22, the pressure inside the capsule 2 may rise. The prepared coffee will drain from the capsule 2 through the exit openings 27 and outlets 32 of the support member 8, and may be supplied to a container such as a cup (not shown).

(49) FIGS. 8a and 8b show an enlarged detail of a part of the system 1 according to the invention. In this example four circumferential ridges 28.i are arranged on the flange-like rim 20. Here, the ridges 28.i are integral with the rim 20. In this example the ridges 28.i are arranged concentrically with respect to each other. In this example the ridges 28.i are also arranged concentrically with an axis of the cup 12.

(50) In FIG. 8a the leading edge 30 of the enclosing member 6 comprises an irregularity in the form of a protrusion 34, e.g. a bulge, a burr or a lump (e.g. caked-on debris). It can be seen that in this example one particular ridge 28.3 of the ridges 28.i abuts the protrusion 34 and is locally more compressed. Hence, the ridges 28.i and the enclosing member 6 are in sealing engagement despite the presence of the protrusion 34.

(51) In FIG. 8b the leading edge 30 of the enclosing member 6 comprises an irregularity in the form of a recess 35 or depression, e.g. a dent, scratch or a crevice. It can be seen that in this example one particular ridge 28.2 of the ridges 28.i faces the recess 35. A neighbouring ridge 28.3 will, accordingly, be locally more compressed and abut the leading edge 30 of the enclosing member 6. Hence, the ridges 28.i and the enclosing member 6 are in sealing engagement despite the presence of the recess 35.

(52) In the examples of FIGS. 8a and 8b, each of the ridges 28.i has a substantially triangular cross section. This provides the advantage that compression of the ridges 28.i requires a progressively increasing force. Hence, each ridge 28.i can easily follow the contour of the irregularity of the enclosing member 6.

(53) In the examples of FIGS. 8a and 8b, all ridges have substantially the same height H.sub.R prior to use, e.g. prior to being compressed. Hence, all ridges 28.i may equally contribute to the sealing engagement between the capsule 2 and the enclosing member 6. Hence, a misalignment between the capsule 2 and the enclosing member 6 may be tolerated, without the leading edge 30 failing to abut any ridge 28.i.

(54) In the examples of FIGS. 8a and 8b the ridges 28.i each have a maximum individual width W.sub.R that is less than the width W.sub.LE of the leading edge 30 of the enclosing member 6. Thus, each ridge 28.i is narrow relative to the leading edge 30, so that each ridge 28.i can easily be compressed by the leading edge 30. Further, here the plurality of ridges 28.i has a combined width We that is larger than the width W.sub.LE of the leading edge 30 of the enclosing member 6. Hence, a misalignment between the capsule 2 and the enclosing member 6 may be tolerated, without the leading edge 30 failing to abut any ridge 28.i. It will be appreciated that in general the width of individual members of the at least one protrusion may be less than the width of the portion of the receptacle arranged to interact with the capsule. It will also be appreciated that in general the width of the at least one protrusion may be larger than the width of the portion of the receptacle arranged to interact with the capsule.

(55) In these examples, the width W.sub.R of each of the ridges 28.i is smaller than the height H.sub.R of that ridge prior to use. Hence the ridges 28.i have a slender form, allowing easy deformation of the ridges 28.i, e.g. by compression of a top edge 36 of he ridges towards a base 38 of the ridges 28.i. Hence, the ridges 28.i may easily follow the irregularity in the enclosing member 6 at the location of the sealing engagement. It is noted that herein the width W.sub.R of the ridge is measured parallel to the plane onto which the ridge is arranged and that the height H.sub.R of the ridge is measured orthogonal to the width.

(56) In these examples, the width W.sub.R each of the ridges 28.i is less than a thickness H.sub.F of the flange-like rim 20. Also in these examples, the height H.sub.R of each of the ridges 28.i prior to use is less than the thickness H.sub.F of the flange-like rim 20. Hence, a resistance against compression of the ridges 28.i may be less than a resistance against compression of the rim 20. In these examples the rim 20 will be rigid relative to the ridges 28.i, while the ridges 28.i may possess enough compressibility due to their shape and dimensions to provide the sealing engagement with the enclosing member 6 even if the enclosing member comprises the irregularity at the location of the sealing engagement. It will be appreciated that the ratio of the resistance against compression of the ridges 28.i to the resistance against compression of the rim 20 may be further improved by increasing the thickness of the rim 20 at least locally at the position of the ridges 28.i.

(57) The geometry of the ridges 28.i allows the ridges 28.i to adapt to an irregularity at the enclosing member 6, even if a material is chosen which allows the remainder of the cup 12 to be substantially rigid. Such substantially rigid cup 12 may increase the ease of handling of the capsule 2. It is for instance possible that the ridges 28.i are unitary with the flange-like rim 20, circumferential wall 16, and optionally the bottom 18, e.g. of a plastics material. It has been found that in such case the cup 12 may be substantially rigid, while the ridges 28.i may cooperate with the enclosing member 6 to provide the sealing engagement even if the chosen plastics material has a shore D hardness of 70 or more.

(58) In these examples, the thickness of the rim 20 is approximately 0.2 mm. In these examples, the width of the leading edge 30 of the enclosing member 6 is approximately 0.7 mm. In these examples the height H.sub.R of each of the ridges 28.i is approximately 0.2 mm prior to use. Preferably the height H.sub.R is more than 0.3 mm, more preferably more than 0.21 mm, it is also possible that the height H.sub.R is more than 0.15 mm prior to use. In these examples the maximum width W.sub.R of each of the ridges 28.i is approximately 0.14 mm. Preferably, the width W.sub.R is more than 0.3 mm, more preferably more than 0.21 mm, most preferably more than 0.15 mm. These dimensions have been found to provide good sealing engagement between the ridges 28.i and the enclosing member 6.

(59) In the examples of FIGS. 8a and 8b the ridges 28.i are spaced radially such that two neighbouring ridges substantially abut radially. More in general, the radial distance between two neighbouring ridges 28.i is preferably less than the maximum width W.sub.R of the ridges 28.i, more preferably less than 50% of the maximum width W.sub.R, most preferably less than 25% of the maximum width W.sub.R. Thus, the ridges 28.i are spaced closely together, allowing a good chance that at least one of the ridges 28.i properly abuts against the leading edge 30 of the enclosing member 6. Also, the closely spaced ridges 28.i allow for increased tolerance to misalignment of the capsule 2 with respect to the enclosing member 6, since the narrow space between the ridges 28.i may form a labyrinth providing sufficient resistance against fluid flow to provide a sufficient sealing engagement, even if not one single ridge 28.i fully abuts against the enclosing member 6.

(60) In a preferred embodiment according to FIG. 8a or FIG. 8b, the ridges 28.i are integrally formed with the cup 12. The ensemble of the cup 12 and ridges 28.i may e.g. be injection moulded in one piece. The ensemble may be formed from a plastics material, such as for instance polypropylene.

(61) In a preferred embodiment the material of the ridges 28.i is chosen to be plastically deformable. Preferably, the ridges 28.i, at least the tops 36 of the ridges may be plastically deformed upon contact with the enclosing member 6. The plastically deforming ridges 28.i may easily adapt to an irregularity of the enclosing member 6 at the location of the sealing engagement.

(62) It will be appreciated that the details of FIGS. 8a and 8b may be applied to the system described in view of FIG. 1 as well as to the system described in view of FIG. 7.

(63) FIG. 9 shows an enlarged detail of a part of an elaborate system 1 according to the invention. In this example, in addition to the plurality of ridges 28.i, the capsule 2 comprises a further ridge 40.

(64) In FIG. 9 the further ridge 40 is arranged on the flange-like rim 20, on the side facing away from the lid 14. Here, the further ridge 40 is integral with the flange-like rim 20. In this example, the further ridge 40 is substantially concentric with the ridges 28.i. Here the further ridge 40 is positioned circumscribing the ridges 28.i. It will be noted that a height H.sub.FR of the further ridge 40 is different from the height H.sub.R of the ridges 28.i. In this example, the height H.sub.FR of the further ridge 40 is larger than the height H.sub.R of the ridges 28.i.

(65) In this example, the further ridge 40 is arranged to abut against an outer circumferential surface 42 of the enclosing member 6. The outer circumferential surface 42 may be wedged against the inner circumferential surface 44 of the further ridge 40. In order to facilitate insertion of the enclosing member 6 within the perimeter of the further ridge 40, the further ridge 40 may comprise a conical section 46 on the inner circumferential surface 44.

(66) Thus, in this example at least one of the ridges 28.i abuts against the enclosing member 6, and additionally, the further ridge 40 abuts against the enclosing member 6. Hence, an improved sealing engagement between the capsule 2 and the enclosing member 6 may be obtained.

(67) It will be appreciated that the further ridge 40 may also be applied in the situations described with respect to FIGS. 1, 7, 8a and 8b. It will be appreciated that the further ridge 40 may also be used in conjunction with any one of the protrusions discussed with respect to FIGS. 2-6.

(68) FIG. 10a shows a schematic representation of a further example of a system 1 according to the invention. The system 1 shown in FIG. 10a is substantially identical to the system shown in FIG. 1. In FIG. 10a, however, the location of the at least one projection, here ridges 28.i, on the cup 12 is different. In this example, the at least one projection, here ridges 28.i, is located on the circumferential side wall 16 of the cup 12. Here, the at least one projection, here ridges 28.i, abuts against an inner circumferential surface 48 of the enclosing member 6. In FIG. 10a the at least one projection, here ridges 28.i, and the inner circumferential surface 48 are in sealing engagement. It will be appreciated that also in the system shown in FIGS. 2-7 the at least one projection, e.g. the ridges 28.i, may be located on the circumferential side wall 16 of the cup 12.

(69) FIG. 10b shows a schematic representation of a further example of a system 1 according to the invention. The system 1 shown in FIG. 10b is substantially identical to the system shown in FIG. 7. In FIG. 10b, however, the location of the at least one projection, here the ridges 28.i, on the cup 12 is different. In this example, the at least one projection, here the ridges 28.i, is located on the outer surface of the bottom 18 of the cup 12. Here, the at least one projection, here ridges 28.i, abuts against an inner back surface 50 of the enclosing member 6. In FIG. 10b the at least one projection, i.e. the ridges 28.i, and the inner back surface 50 are in sealing engagement. It will be appreciated that also in the system shown in FIGS. 1-6 the at least one protrusion, e.g. the ridges 28.i, may be located on the outer surface of the bottom 18 of the cup 12.

(70) FIG. 11 presents in a schematic way an embodiment of a further example of a capsule according to the invention. View 160 presents schematically a portion of an axial cross-section of the capsule according to a further aspect of the invention. It will be appreciated that general details not discussed with reference to this Figure may be found with reference to FIG. 2.

(71) In accordance with a present aspect of the invention the capsule 160 and the surface 109 of the receptacle in use form a substantially sealing engagement when the surface 109 of the receptacle 108 intercepts the elongated structures 164.

(72) Preferably, the height of the flange-like rim 104 at a periphery of the capsule 160 near the outer ring 106 may be about 0.2 mm. The elongated structures 164 may be provided on a projection 162, which may be as high as 0.5-0.7 mm counting from the bottom surface 104a of the flange-like rim, see item H1. The elongated structures 164 may be about 0.25 mm high (see item h2) leading to a total elevation of the flange-like rim at this are to 0.8-1 mm.

(73) It was found that by providing the local elevation of the flange-like rim in an area adjacent or connecting to the outer surface of the capsule 102a an improved sealing engagement between the capsule and the receptacle is obtained. Due to the fact that the elongated structures may be depressed of otherwise deformed individually the quality of the sealing engagement is substantially improved.

(74) FIG. 12 presents in a schematic way an embodiment of a still further example of a capsule according to the invention. In this embodiment two variants are shown which may be used individually or in combination.

(75) For the sake of simplicity, items discussed with reference to FIGS. 2 and 11 will be not repeated here unless modified.

(76) In a first embodiment, the surface of the flange-like rim may be elevated as a whole to a level H3, which may be as high as 0.8-1.0 mm. It this way a substantially elevated projection is provided which may be seamlessly connected to the outer surface of the capsule 102a. Preferably, the projection 104″ is made of a substantially soft and deformable material. More preferably, the capsule is made from the same soft and deformable material whereby the projection 104″ is inherently integrated with it. For example, such structure may be provided by suitable molding techniques.

(77) Secondly, the elevated projection 104″ may be provided with elongated projections 164″ which may be provided as suitable grooved in the body of the projection 104. In this way local deforming properties of the projection are substantially increased as the elongated structures 164″ may be deformed individually. It will be appreciated that the elongated structures may be provided on a portion of the elevated projection 104″, or they may cover its whole lateral surface.

(78) FIG. 13 presents schematically a top view of a suitable circumferential projection having an irregular shape. The projection 180 is arranged on the flange-like rim, in such a way that it runs across a path conceived to be occupied by a surface of the receptacle in use. It will be appreciated that a suitable plurality of variants of the shape of the projection 180 is possible, including zigzags, labyrinths and so forth. Also, a plurality of coherent irregular shapes a, b may be provided.

(79) 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.

(80) It is for instance possible that the capsule as shown in FIG. 7 is used in the system of FIG. 1. It is possible that in such instance the capsule is designed such that the bottom is not pierced by the bottom piercing means. It is also possible that the lid and the lid piercing means are designed such that the lid is not torn under the effect of fluid pressure in the inner space of the capsule.

(81) It will be appreciated that if the enclosing member has the leading edge for abutting the flange-like rim of the capsule, this leading edge may also comprise irregularities in the form of a plurality of radially extending grooves. Also in such case a sealing engagement may be obtained between the leading edge of the enclosing member and the ridges of the capsule according to the invention.

(82) It is possible that the capsule is provided as a fillable or refillable capsule that can be filled or refilled by a user, respectively. Such capsule may be provided as a separate cup and lid that may be connected to the cup by the user after filling the capsule with a beverage ingredient. Alternatively, the lid may be partially, e.g. hingedly, connected to the cup so the user can connect the lid to substantially the entire perimeter of the flange-like rim after filling the cup with the beverage ingredient.

(83) In the examples, the plurality of ridges comprises three or four ridges. It will be appreciated that also another number of ridges may be used, such as two, five or six ridges.

(84) It will be appreciated that while specific embodiments of the invention have been described above, that the invention may be practiced otherwise than as described. In addition, isolated features discussed with reference to different figures may be combined.

(85) However, other modifications, variations and alternatives are also possible. The specifications, drawings and examples are, accordingly, to be regarded in an illustrative rather than in a restrictive sense.

(86) In some embodiments, a capsule for preparing a predetermined quantity of beverage suitable for consumption using an extractable product, by means of a beverage brewing device comprising a receptacle for receiving the capsule, includes a cup comprising a circumferential wall, a bottom closing the circumferential wall at a first end, and a lid in use connected to the cup at a second end of the circumferential wall opposite the bottom, wherein the wall, bottom and lid, in use, enclose an inner space comprising the extractable product, and wherein at least a portion of a surface of the capsule conceived to, in use, interact with the receptacle is provided with at least one projection for forming a sealing engagement with the receptacle.

(87) In some embodiments, the cup further comprises a flange-like rim extending outwardly of the circumferential wall at the second end, wherein the at least one projection is provided on the flange-like rim.

(88) In some embodiments, the at least one projection is circumferential with respect to the capsule.

(89) In some embodiments, the at least one projection is provided on separate regions along a periphery of the capsule.

(90) In some embodiments, a height of the at least one projection is modulated.

(91) In some embodiments, the at least one projection comprises a circumferential ridge.

(92) In some embodiments, the at least one projection comprises a plurality of circumferential ridges.

(93) In some embodiments, said at least one projection is not a plurality of concentric circumferential ridges made of the same material as the cup provided on the flange-like rim.

(94) In some embodiments, the at least one projection comprises a body capable of retaining fluid.

(95) In some embodiments, said body comprises a sponge.

(96) In some embodiments, a plurality of elongated individual projections is provided, said projections forming a brush-like area.

(97) In some embodiments, at least one of the elongated individual projections has a different height than the other elongated individual projections.

(98) In some embodiments, the height of the elongated individual projections is in the range of 0.1 to 2 mm, preferably in the range of 0.13 to 1 mm, more preferably in the range from 0.15 to 0.5 mm.

(99) In some embodiments, the at least one projection comprises a textured material.

(100) In some embodiments, the textured material comprises an elevated area and a depressed area, a height difference between the elevated area and the depressed area being at least 0.05 mm, preferably at least 0.15 mm.

(101) In some embodiments, the at least one projection comprises a plurality of interconnected tubular structures.

(102) In some embodiments, the plurality of interconnected tubular structures comprises polygonal structures, preferably honeycomb structures.

(103) In some embodiments, the tubular structures are hollow.

(104) In some embodiments, the at least one projection comprises an oblique bridge extending between the flange-like rim and the wall.

(105) In some embodiments, the bridge comprises two or more branches bifurcating from a base portion attached to the flange-like rim.

(106) In some embodiments, the at least one projection is flexible.

(107) In some embodiments, the at least one projection is elastically deformable.

(108) In some embodiments, the at least one projection is plastically deformable.

(109) In some embodiments, the projection is made of the same material as the cup.

(110) In some embodiments, the projection is integral with the cup.

(111) In some embodiments, each ridge of the plurality of ridges has substantially the same height.

(112) In some embodiments, each ridge of the plurality of ridges has substantially the same width.

(113) In some embodiments, a width of a ridge of the plurality of ridges is smaller than a height of that ridge.

(114) In some embodiments, a ridge of the plurality of ridges has a width that is equal to or less than a thickness of the flange-like rim.

(115) In some embodiments, a ridge of the plurality of ridges has a height that is equal to or less than a thickness of the flange-like rim.

(116) In some embodiments, each ridge of the plurality of ridges has substantially the same cross sectional shape.

(117) In some embodiments, a ridge of the plurality of ridges has a tapered, e.g. a substantially triangular, cross section.

(118) In some embodiments, a radial distance between two neighbouring ridges is less than a maximum width of the ridges, preferably less than 50% of the maximum width, more preferably less than 25% of the maximum width.

(119) In some embodiments, the plurality of ridges comprises two, three, four, five or six ridges.

(120) In some embodiments, a ridge of the plurality of ridges has a height of less than 0.3 mm, preferably less than 0.21 mm, more preferably less than 0.15 mm.

(121) In some embodiments, a ridge of the plurality of ridges has a maximum width of less than 0.3 mm, preferably less than 0.21 mm, more preferably less than 0.15 mm.

(122) In some embodiments, the ridges are made from a plastic material.

(123) In some embodiments, the ridges are plastically deformable.

(124) In some embodiments, the capsule comprises a further ridge which is substantially concentrically enveloping the at least one projection, wherein a height of the further ridge is different from the height of the at least one projection.

(125) In some embodiments, the height of the further ridge is larger than the height of the at least one projection.

(126) In some embodiments, the further ridge comprises a conical section on an inner circumferential surface thereof.

(127) In some embodiments, the lid is connected to cup at the second end of the circumferential wall, e.g. to the flange-like rim, and the inner space is at least partially filled with the extractable product.

(128) In some embodiments, the capsule is hermetically closed.

(129) In some embodiments, the lid and/or bottom is porous and/or comprises openings for allowing a liquid to enter and/or exit the inner space.

(130) In some embodiments, the capsule is disposable.

(131) In some embodiments, a system for preparing a predetermined quantity of beverage suitable for consumption using an extractable product, includes a capsule according to any one of the preceding clauses; and a beverage brewing device comprising a receptacle for interacting with the capsule, wherein, in use, the at least one projection abuts against at least a portion of the receptacle such that a sealing engagement between the capsule and the receptacle is formed.

(132) In some embodiments, the receptacle is provided in a form of an enclosing member.

(133) In some embodiments, the further ridge is arranged to abut against an outer circumferential surface of the enclosing member.

(134) In some embodiments, the capsule is enclosed in the enclosing member such that the at least one projection abuts against at least the portion of the enclosing member, such that a sealing engagement between the capsule and the enclosing member is formed.

(135) In some embodiments, a method of preparing a predetermined quantity of beverage suitable for consumption using an extractable product, includes the steps of—providing a capsule according to any one of the preceding clauses. providing a beverage brewing device comprising a receptacle for interacting with the capsule; positioning the capsule in the receptacle such that at least one of the projections contacts at least a portion of the receptacle for forming a sealing engagement between the capsule and the receptacle; providing a fluid, such as water, to the inner space of the capsule for preparing the beverage; and draining the beverage from the capsule.

(136) In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word ‘comprising’ does not exclude the presence of other features or steps then those listed in a claim. Furthermore, the words ‘a’ and ‘an’ shall not be construed as limited to ‘only one’, but instead are used to mean ‘at least one’, and do not exclude a plurality. The mere fact that certain measures are recited in mutually different claims does not indicate that a combination of these measures cannot be used to advantage.