CAPSULE FOR INFUSION AND SOLUBLE BEVERAGES WITH ANTI-DRIP SYSTEM

Description

[0001] The object of the present invention is a capsule for the preparation of infused or soluble beverages.

[0002] In particular, the object of the present invention is a capsule for the packaging of concentrated products (for example in the form of powder, granules, leaves) in predetermined and single-use doses for the impromptu preparation of beverages (such as tea, coffee, herbal teas, milk, chocolate, etc.) by introducing a fluid under pressure (usually hot water) into the same capsule.

[0003] Such known capsules, like for example those described in WO2016/ 193961 A2, contain a pre-packaged single-use dose of the substance to be infused, enclosed within a plastic container (called a cup), closed by a cover.

[0004] There are different types of automatic or semi-automatic machines for the preparation of infused beverages. The operating principle common to one particular category of such machines provides for the perforation of the cover of the capsule and the injection inside the cup of the fluid under pressure. The consequent penetration of the substance to be infused contained within the cup by the flow of hot water, dispensed by an infuser group of the same machine, results in the preparation of the infused beverage.

[0005] At the end of the dispensing cycle of the preparation machine, in particular when the capsule is removed from the infusion chamber, a part of the residual fluids still contained inside the cup may leak, causing a consequent dripping to the outside which may be annoying and difficult for the user to manage.

[0006] The object of the present invention is to provide a capsule for the preparation of infused or soluble beverages that solves the problems of the known art by taking into account the needs of the sector.

[0007] In particular, the object of the present invention is to provide a capsule for the preparation of infused beverages equipped with an anti-drip system which, by exploiting the principle of capillarity, prevents the fluids remaining inside the cup from leaking out, once the capsule is disengaged from the infuser group of the preparation machine.

[0008] Such object is achieved by a capsule for the preparation of infused or soluble beverages according to claim 1. The dependent claims describe preferred embodiments of the invention.

[0009] The features and advantages of a capsule for the preparation of infused or soluble beverages according to the present invention will be apparent from the description given below, provided by way of non-limiting example, in accordance with the accompanying figures, wherein:

• figure 1 is a sectional view of a capsule for the preparation of infused or soluble beverages in accordance with the present invention;
• figure 2a shows a sectional view of a capillary channel in accordance with an embodiment;
• figure 2b shows a sectional view of a capillary channel in accordance with a further embodiment;
• figure 3a shows a top view of the inner bottom of a capsule according to a first variant embodiment;
• figure 3b shows a perspective sectional view of the variant of figure 3a;
• figure 4a shows a top view of the inner bottom of a capsule according to a second variant embodiment;
• figure 4b shows a perspective sectional view of the variant of figure 4a;
• figure 5a shows a top view of the inner bottom of a capsule according to a third variant embodiment;
• figure 5b shows a perspective sectional view of the variant of figure 5a;
• figure 6a shows a top view of the inner bottom of a capsule according to a fourth variant embodiment;
• figure 6b shows a perspective sectional view of the variant of figure 6a;
• figure 7a shows a top view of the inner bottom of a capsule according to a fifth variant embodiment;
• figure 7b shows a perspective sectional view of the variant of figure 7a;
• figure 8a shows a top view of the inner bottom of a capsule according to a sixth variant embodiment;
• figure 8b shows a perspective sectional view of the variant of figure 8a;

[0010] With reference to the accompanying figures, a capsule for the preparation of infused or soluble beverages is shown, indicated at the reference number 1.

[0011] Capsule 1 comprises a body or cup 2 suitable for defining an internal volume V for containing at least one substance 11 to be infused or dissolved, typically in powder or granular form.

[0012] The cup 2 is made of plastic material, preferably by injection or co-injection molding, or thermoformed.

[0013] The cup 2 is provided, on the one side, with a bottom 3 and, on the opposite side, with an inlet opening 21 defined by an edge 4 protruding outward.

[0014] The capsule 1 comprises a cover 6 fixed by bonding or welding to the upper edge 4 adapted to seal the cup 2 at the top.

[0015] The cup 2 is provided externally on the bottom 3 with an outlet opening 31, defined by a nozzle 32, adapted to allow the outflow of the infused beverage.

[0016] The cup 2 is provided internally at the bottom 3 with an inner base 33 provided with a plurality of reliefs 310, 320, 360 projecting vertically with respect to the same base 33. The reliefs protrude toward the inside of the cup 2, toward the cover 6. Advantageously, the top surface of the reliefs 310, 320, 360 is substantially flat and devoid of cutting, puncture or tearing elements.

[0017] As shown in figures 3 and 8, the base 33 comprises a central portion 310 defined by a first relief covering the outlet opening 31 of the nozzle 32. The central portion 310 is provided with at least one connection opening 311 between the inside of the cup 2 and the outlet opening 31 to allow the flow of the infused beverage out of the capsule 1. Preferably, the central portion 310 comprises a plurality of connection openings 311.

[0018] The base 33 comprises a labyrinth 30 adapted to prevent, by capillarity, the passage of the infused beverage towards the nozzle 32 when the pressure inside the capsule 1 drops below a threshold value or ceases altogether when the capsule 1 is disengaged from the infuser group of the machine. The labyrinth 30 is defined by a plurality of reliefs called labyrinth portions 320.

[0019] The base 33 comprises an outer edge 360, defined by a further relief, on which a sealing disc 5 is fixed in a partially releasable manner, i.e. in a peelable manner by gluing or welding.

[0020] The capsule 1 is therefore internally provided with a sealing disk 5 located at the base 33 and adapted to seal the cup 2 on the bottom. The capsule 1 is thus provided with a closed chamber 12, defined at the top by the cover 6 and at the bottom by the disc 5, within which the substance 11 to be infused or dissolved is contained.

[0021] The disc 5 is made of plastic, multilayer or single layer, or of aluminum, or of a plastic/aluminum composite material.

[0022] The disc 5 is positioned between the inner volume V and the base 33, below the substance 11, fixed on the reliefs 310, 320, 360.

[0023] The disc 5 is then fixed on the edge 360, on the labyrinth 30 and on the central portion 310.

[0024] Preferably, the disc 5 is peelably fixed at least on the upper surface of the relief 360 of the base 33, so as to detach therefrom as a result of the pressure increase inside the capsule 1.

[0025] In use inside an infused beverage preparation machine, which pierces the cover 6 and injects the fluid under pressure into the cup 2, the pressure exerted by the fluid rises until the opening pressure is reached (for example between 4 and 8 bar), which pushes on the disc 5 until the capsule 1 opens. In particular, due to the increase in pressure inside the capsule 1, the disc 5 deforms until it separates from the edge 360 of the base 33. Such separation causes the sealing effect previously ensured by the sealing disc 5 to fail.

[0026] Preferably, between the edge 360 and the labyrinth 30, there is defined at the base 33 a collecting depression 330 adapted to collect the infused beverage and to allow the outflow thereof toward the labyrinth 30.

[0027] Preferably, between the labyrinth 30 and the central portion 310, there is defined at the base 33 a conveying depression 340 adapted to collect the infused beverage and to allow it to flow through the openings 311 towards the nozzle 32, and outside of the capsule 1.

[0028] Preferably, the capsule 1 is provided, at the base 33, with supports 90 adapted to accompany the deformation of the disc 5 in such a way that it does not tear or break, and keeps the disc raised in such a way that it does not adhere to the bottom of the collecting depression 330. According to the invention the supports 90 are arranged inside the collecting depression 330 between the labyrinth 30 and the edge 360.

[0029] Preferably, the base 33 also comprises, inside of the collecting depression 330, a plurality of supports 350, defined by further reliefs, arranged between the labyrinth 30 and the edge 360. The supports 350, substantially in the form of a circumferential arc, define a plurality of recesses 351 or compartments. In particular, a recess 351 is defined between a pair of adjacent supports 350. Advantageously, the recess 351 defines a preferential space for the deformation of the disc 5.

[0030] As already mentioned, in the known capsules, the problem of dripping of residual fluids still contained inside the cup at the end of the dispensing cycle, in particular when the capsule is removed from the infusion chamber, is highlighted.

[0031] Advantageously, the capsule 1 according to the present invention is provided with an anti-drip system which, exploiting the principle of capillarity, prevents the fluids remaining inside the cup 2 from leaking out.

[0032] The base 33 comprises in effect the labyrinth 30.

[0033] The labyrinth 30 comprises a plurality of labyrinth portions 320 which define a plurality of capillary channels 321.

[0034] Each labyrinth portion 320 develops radially with respect to the base 33, between the collecting depression 330 and the conveying depression 340.

[0035] According to the invention, Each capillary channel 321 connects the collecting depression 330 with the conveying depression 340 and defines an outflow path for the infused beverage towards the outlet opening 31.

[0036] The capillary channel 321 is defined between two adjacent labyrinth portions 30 and is closed at the top by the disc 5, as shown in figures 2a and 2b.

[0037] The capillary channel 321 is defined between an inlet 326 and an outlet 327.

[0038] The outlet 327 of the capillary channel 321 flows into the conveying depression 340.

[0039] In order to optimize the capillary effect provided by the labyrinth 30 and to provide a particularly effective anti-drip system, some measures have been adopted.

[0040] In particular, the section of the capillary channel 321 is between 0.01 mm² and 0.3 mm², preferably between 0.08 mm² and 0.15 mm², even more preferably 0.1 mm2. Such section allows, on the one hand, to achieve the outflow of the infused beverage under pressure (between 4 bar and 8 bar), and on the other, to effectively retain the residual fluids inside the cup 2 when the pressure drops below a threshold value.

[0041] In the embodiment of figure 2a, the section of the capillary channel 321 is polygonal, preferably square or rectangular.

[0042] In the variant embodiment of figure 2b, the section of the capillary channel 321 is at least partly curved.

[0043] To define the section of the capillary channel 321 in terms of base b and height h: preferably the base b is between 0.1 mm and 0.5 mm, even more preferably 0.3 mm; preferably the height h is between 0.1 mm and 0.6 mm, even more preferably between 0.3 mm and 0.4 mm.

[0044] The length of the capillary channel 321 being defined as LC, measured as the length of the path between the inlet 326 and the outlet 327, and the radial length of the labyrinth 30 as LL, measured as the radial distance between the inlet 326 and the outlet 327: the length LC of the capillary channel 321 is greater than the radial length LL of the labyrinth 30 (LC> LL).

[0045] Preferably, the ratio between the length LC of the capillary channel 321 and the radial length LL of the labyrinth 30 (LC/LL) is between 1.5 and 5, preferably between 2 and 3.

[0046] Preferably, the capillary channel 321 has a tortuous pattern.

[0047] The capillary channel 321 comprises at least one curve 328 or one change of direction.

[0048] In the embodiments shown in figures 3 to 6, the capillary channel 321 comprises a plurality of angled curves, preferably at 90° angles.

[0049] In the embodiments shown in figures 3, 4, 5, 6 and 7, the capillary channel 321 has a substantially radial pattern.

[0050] In the embodiments shown in figures 3 to 5, the capillary channel 321 has a zigzag or "square wave" pattern.

[0051] In the variant of figure 7, the capillary channel 321 has a radial and circumferential pattern.

[0052] In the variant of figure 8, the capillary channel 321 has a winding line pattern.

[0053] The labyrinth 30 comprises a number of capillary channels 321 ranging from 10 to 40, preferably 20 to 30. This solution makes it possible to exploit all the space available between the collecting depression 330 and the conveying depression 340, in order to make capillary channels 321 that are sufficiently narrow and long.

[0054] Advantageously, the capillary channels 321 as described above with regard to the embodiments 3 to 8 are provided with a particularly thin section and a length that retains the residual liquid by capillarity, so as to considerably reduce and even eliminate dripping when the pressure inside of the capsule drops below a threshold value or ceases completely.

[0055] Preferably, in an embodiment as shown in figures 4 and 5, all the capillary channels 321 flow into the conveying depression 340 at a bank 9. That is, the outlet 327 of each capillary channel 321 faces a bank 9. That is to say, none of the outlets 327 of the capillary channels 321 directly faces a connection opening 311.

[0056] The bank 9 is a relief arranged within the conveying depression 340.

[0057] The bank 9 is a relief arranged circumferentially between the labyrinth 30 and the connection opening 311.

[0058] Such solution keeps the flow of the infused beverage from being directly channeled into a connection opening 311 towards the nozzle 32, reducing the vorticity of the flow leaving the capsule 1 and thus eliminating splashing.

[0059] The capsule 1 may be made in different versions, for example, for the preparation of infused beverages (for example coffee or tea) or soluble beverages.

[0060] Preferably, the coffee capsule 1 comprises a fixed filter under the substance 11 and just above the disk 5.

[0061] Preferably, the coffee capsule 1 further comprises a permeable or micro-perforated film, fixed at a certain distance above the substance 11.

[0062] The capsule 1, in its different variant embodiments, may be used for the impromptu preparation of beverages (such as tea, coffee, herbal teas, milk, chocolate, etc.) by means of automatic or semi-automatic machines equipped with a dispensing unit adapted to produce an infusion via the passage of pressurized hot water through the capsule 1.

[0063] A capsule according to the present invention may be used for the packaging of concentrated products (in the form of powder or granules or leaves) in predetermined and single-use doses, for the impromptu preparation of beverages such as leaf or soluble tea, powdered or instant coffee, herbal teas, milk, chocolate, or other dehydrated and soluble products.

[0064] Innovatively, a capsule for the preparation of infused or soluble beverages according to the present invention is provided with a labyrinth portion 30 which acts as an anti-drip system. The labyrinth portion 30, exploiting the principle of capillarity, prevents the fluids remaining inside the cup 2 from leaking out once the capsule is disengaged from the infuser group of the preparation machine.

[0065] Advantageously, in a variant embodiment of the capsule according to the present invention, all the capillary channels 321 flow at a bank 9 in such a way as to avoid that the flow of the infused beverage is directly channeled into a connection opening 311 towards the nozzle 32, reducing vorticity and eliminating splashes.

Claims

1. Capsule (1) for preparing infusion or soluble beverages, comprising a cup (2) adapted to define an inner volume (V) for containing at least one substance (11) to be infused or dissolved,
said cup (2) being closed at the top by a cover (6) and provided with:

on the opposite side of the cover (6), an opening (31) for the exit of the infused beverage; internally with a base (33) having reliefs projecting towards the cover (6) ;

internally with a sealing disc (5), fixed between the inner volume (V) and the reliefs, adapted to inferiorly seal the capsule (1);

said base (33) comprising a labyrinth (30) having a plurality of labyrinth portions (320), adapted to prevent the passage by capillarity of the infused beverage towards the opening (31) when the pressure inside the capsule (1) falls below a threshold value;

characterized in that said labyrinth (30) comprises a plurality of capillary channels (321), each channel (321) being defined between two adjacent labyrinth portions (30) and superiorly closed by the sealing disc (5), wherein the section of the capillary channels (321) is between 0.01 mm² and 0.3 mm², preferably between 0.08 mm² and 0.15 mm²,

and in that each labyrinth portion (320) develops radially with respect to the base (33), between a collecting depression (330), defined between an outer edge (360) and the labyrinth (30), and a conveying depression (340), defined between the labyrinth (30) and a central portion (310), and in that each capillary channel (321) connects the collecting depression (330 with the conveying depression (340).

2. Capsule (1) according to claim 1, wherein having defined the section of the capillary channel (321) in terms of base (b) and height (h), the base (b) is between 0.1 mm and 0.5 mm, and the height (h) is between 0.1 mm and 0.6 mm.

3. Capsule (1) according to claim 1 or 2, wherein the length (LC) of the capillary channel (321), measured as the distance of the path between an inlet (326) and an outlet (327), is greater than the length (LL) of the labyrinth (30), measured as radial distance (LL) between the inlet (326) and the outlet (327).

4. Capsule (1) according to claim 3, wherein the ratio between the length (LC) of the capillary channel (321) and the length (LL) of the labyrinth (30) is between 1.5 and 5, preferably between 2 and 3.

5. Capsule (1) according to any one of the preceding claims, wherein the labyrinth (30) comprises a number of capillary channels (321) between 10 and 40, preferably between 20 and 30.

6. Capsule (1) according to any one of the preceding claims, wherein the capillary channel (321) has a zigzag or a "square wave" or a winding line pattern.

7. Capsule (1) according to any one of the preceding claims, wherein the capillary channel (321) has a tortuous pattern, i.e. comprises a plurality of angled curves, preferably with 90° angles.

8. Capsule (1) according to any one of the preceding claims, wherein an inlet (326) and an outlet (327) being defined for each capillary channel (321), all the capillary channels (321) flow at a bank (9), i.e. a relief arranged circumferentially between the labyrinth (30) and the opening (31) for the exit of the infused beverage.

9. Capsule (1) according to any one of the preceding claims, wherein the disc (5) is fixed in a peelable manner on an edge (360) of the base (33) in order to separate therefrom at least partially due to the increase of pressure within the capsule (1), and wherein the opening of the capsule (1) for the exit of the infused beverage occurs by deformation of the disc (5) as a result of the pressure exerted by the fluid inside the capsule (1).

Ansprüche

1. Kapsel (1) zum Zubereiten von Aufguss oder löslichen Getränken, umfassend einen Becher (2), der angepasst ist, ein Innenvolumen (V) zum Enthalten zumindest einer Substanz (11) zu definieren, die aufgegossen oder gelöst werden soll,
wobei der Becher (2) oben durch eine Abdeckung (6) verschlossen ist und versehen ist:

auf der gegenüberliegenden bzw. entgegengesetzten Seite des Deckels (6), mit einer Öffnung (31) für den Austritt des aufgegossene Getränks; innen mit einer Basis (33) mit Reliefs, die in Richtung der Abdeckung (6) vorstehen;

innen mit einer Dichtscheibe (5), zwischen dem Innenvolumen (V) und den Reliefs fixiert bzw. befestigt, die angepasst ist, die Kapsel (1) unten abzudichten;

wobei die Basis (33) ein Labyrinth (30) mit einer Mehrzahl von Labyrinthabschnitten (320) umfasst, die angepasst sind, durch Kapillarität den Durchtritt des aufgegossenen Getränks in Richtung der Öffnung (31) zu verhindern, wenn der Druck im Inneren der Kapsel (1) unter einen Schwellwert fällt;

dadurch gekennzeichnet, dass das Labyrinth (30) eine Mehrzahl von Kapillarkanälen (321) umfasst, wobei jeder Kanal (321) zwischen zwei angrenzenden bzw. benachbarten Labyrinthabschnitten (30) definiert und durch die Dichtscheibe (5) oben verschlossen ist, wobei der Bereich der Kapillarkanäle (321) zwischen 0,01 mm² und 0,3 mm², vorzugsweise zwischen 0,08 mm² und 0,15 mm² beträgt;

und dadurch, dass sich jeder Labyrinthabschnitt (320) radial in Bezug auf die Basis (33) zwischen einer Sammelvertiefung (330), die zwischen einer Außenkante bzw. einem Außenrand (360) und dem Labyrinth (30) definiert ist, und einer Fördervertiefung (340) entwickelt, die zwischen dem Labyrinth (30) und einem zentralen Abschnitt (310) definiert ist, und dadurch, dass jeder Kapillarkanal (321) die Sammelvertiefung (330) mit der Fördervertiefung (340) verbindet.

2. Kapsel (1) nach Anspruch 1, wobei, nachdem der Bereich des Kapillarkanals (321) in Bezug auf Basis (b) und Höhe (h) definiert wurde, die Basis (b) zwischen 0,1 mm und 0,5 mm und die Höhe (h) zwischen 0,1 mm und 0,6 mm beträgt.

3. Kapsel (1) nach Anspruch 1 oder 2, wobei die Länge (LC) des Kapillarkanals (321), gemessen als der Abstand des Wegs zwischen einem Einlass (326) und einem Auslass (327), größer ist also die Länge (LL) des Labyrinths (30), gemessen als radialer Abstand (LL) zwischen dem Einlass (326) und dem Auslass (327).

4. Kapsel (1) nach Anspruch 3, wobei das Verhältnis zwischen der Länge (LC) des Kapillarkanals (321) und der Länge (LL) des Labyrinths (30) zwischen 1,5 und 5, vorzugsweise zwischen 2 und 3 beträgt.

5. Kapsel (1) nach einem der vorhergehenden Ansprüche, wobei das Labyrinth (30) eine Anzahl von Kapillarkanälen (321) zwischen 10 und 40, vorzugsweise zwischen 20 und 30 umfasst.

6. Kapsel (1) nach einem der vorhergehenden Ansprüche, wobei der Kapillarkanal (321) ein Zickzack- oder "Rechteckwellen-" oder ein Schlängellinienmuster aufweist.

7. Kapsel (1) nach einem der vorhergehenden Ansprüche, wobei der Kapillarkanal (321) ein gewundenes bzw. verschlängeltes Muster aufweist, d. h. eine Mehrzahl abgewinkelter Kurven vorzugsweise mit 90°-Winkeln umfasst.

8. Kapsel (1) nach einem der vorhergehenden Ansprüche, wobei ein Einlass (326) und ein Auslass (327) für jeden Kapillarkanal (321) definiert sind, wobei alle Kapillarkanäle (321) an einem Wall (9) fließen, d.h. einem Relief, das umfangsmäßig zwischen dem Labyrinth (30) und der Öffnung (31) für den Austritt des aufgegossenen Getränks angeordnet ist.

9. Kapsel (1) nach einem der vorhergehenden Ansprüche, wobei die Scheibe (5) auf abziehbare Weise an einer Kante bzw. einem Rand (360) der Basis (33) fixiert bzw. befestigt ist, um sich davon zumindest teilweise aufgrund des Druckanstiegs innerhalb der Kapsel (1) zu trennen, und wobei das Öffnen der Kapsel (1) für den Austritt des aufgegossenen Getränks durch Verformung der Scheibe (5) infolge des von der Flüssigkeit in der Kapsel ausgeübten Drucks erfolgt (1).

Revendications

1. Capsule (1) pour la préparation de boissons à infusion ou à matière soluble, comprenant un gobelet (2) adapté pour définir un volume intérieur (V) pour contenir au moins une substance (11) destinée à être infusée ou dissoute,
le gobelet (2) étant fermé en haut par un recouvrement (6) et pourvu :

sur le côté opposé du recouvrement (6), d'une ouverture (31) pour la sortie de la boisson infusée ; à l'intérieur, d'une base (33) ayant des reliefs s'étendant vers le recouvrement (6) ;

à l'intérieur, d'un disque de scellement (5) fixé entre le volume intérieur (V) et les reliefs, adapté pour sceller la capsule (1) en bas ;

la base (33) comprenant un labyrinthe (30) ayant une pluralité de parties de labyrinthe (320) adaptées pour empêcher le passage par capillarité de la boisson infusée vers l'ouverture (31), lorsque la pression à l'intérieur de la capsule (1) descend en-dessous d'une valeur seuil ;

caractérisée en ce que le labyrinthe (30) comprend une pluralité de canaux capillaires (321), chaque canal (321) étant défini entre deux parties de labyrinthe (30) adjacentes et fermé en haut par le disque de scellement (5), la section transversale des canaux capillaires (321) étant entre 0,01 mm² et 0,3 mm², de préférence entre 0,08 mm² et 0,15 mm²,

et en ce que chaque partie de labyrinthe (320) s'étend radialement par rapport à la base (33) entre un enfoncement de collecte (330), défini entre un bord extérieur (360) et le labyrinthe (30), et un enfoncement de transport 340), défini entre le labyrinthe (30) et une partie centrale (310), et en ce que chaque canal capillaire (321) relie l'enfoncement de collecte (330) à l'enfoncement de transport (340).

2. Capsule (1) selon la revendication 1, caractérisée en ce que, la section transversale du canal capillaire (321) étant définie en termes de largeur (b) et de hauteur (h), la largeur (b) est entre 0,1 mm et 0,5 mm et la hauteur (h) est entre 0,1 mm et 0,6 mm.

3. Capsule (1) selon la revendication 1 ou 2, caractérisée en ce que la longueur (LC) du canal capillaire (321), mesurée comme la distance, en chemin, entre une entrée (326) et une sortie (327) est supérieure à la longueur (LL) du labyrinthe (30) mesurée comme distance radiale (LL) entre l'entrée (326) et la sortie (327).

4. Capsule (1) selon la revendication 3, caractérisée en ce que le rapport entre la longueur (LC) du canal capillaire (321) et la longueur (LL) du labyrinthe (30) est entre 1,5 et 5, de préférence entre 2 et 3.

5. Capsule (1) selon l'une des revendications précédentes, caractérisée en ce que le labyrinthe (30) comprend un nombre de canaux capillaires (321) entre 10 et 40, de préférence entre 20 et 30.

6. Capsule (1) selon l'une des revendications précédentes, caractérisée en ce que le canal capillaire (321) présente une forme en zigzag ou en « onde carrée » ou en ligne sinueuse.

7. Capsule (1) selon l'une des revendications précédentes, caractérisée en ce que le canal capillaire (321) présente une forme tortueuse, c'est-à-dire comprend une pluralité de courbes angulaires, de préférence à angles de 90°.

8. Capsule (1) selon l'une des revendications précédentes, caractérisée en ce que, pour chaque canal capillaire (321), une entrée (326) et une sortie (327) étant définies, tous les canaux capillaires (321) coulent vers une banque (9), c'est-à-dire un relief agencé de façon circonférentielle entre le labyrinthe (30) et l'ouverture (31) pour la sortie de la boisson infusée.

9. Capsule (1) selon l'une des revendications précédentes, caractérisée en ce que le disque (5) est fixé de façon retirable sur un bord (360) de la base (33) afin de se séparer de celle-ci au moins partiellement à la suite de l'augmentation de pression à l'intérieur de la capsule (1) et en ce que l'ouverture de la capsule (1) pour la sortie de la boisson infusée se fait par déformation du disque (5) comme résultat de la pression exercée par le fluide à l'intérieur de la capsule (1).

Drawing