fig1 a - 1 c show a prior art system 101 for preparing a predetermined quantity of beverage suitable for consumption using an extractable product . the system 101 comprises an exchangeable capsule 102 , and an apparatus 104 . the apparatus 104 comprises a receptacle 106 for holding the exchangeable capsule 102 . in fig1 a - 1 c a gap is drawn between the capsule 102 and the receptacle 106 for clarity . it will be appreciated that , in use , the capsule 102 may lie in contact with the receptacle 106 . commonly , the receptacle 106 has a shape complementary to the shape of the capsule 102 . the apparatus 104 further comprises a fluid dispensing device 108 for supplying an amount of a fluid , such as water , under a pressure , of e . g . 9 bars , to the exchangeable capsule 102 . furthermore , an outlet apparatus 109 may be provided for providing fluid from the capsule 102 to a container such as a cup . in the system 101 shown in fig1 a - 1 c , the exchangeable capsule 102 comprises a circumferential wall 110 , a bottom 112 closing the circumferential wall 110 at a first end 114 , and a lid 116 closing the circumferential wall 110 at a second end 118 opposite the bottom 112 . the circumferential wall 110 , the bottom 112 and the lid 116 enclose an inner space 120 comprising the extractable product ( not shown ). the system 101 of fig1 a - 1 c comprises bottom piercing means 122 intended for piercing the capsule 102 . fig1 a shows the bottom piercing means 122 in a retracted position . fig1 b shows the bottom piercing means 122 in an extended position for creating an entrance opening 124 in the bottom 112 for supplying the fluid to the extractable product 20 through the entrance opening 124 . in fig1 a - 1 c the piercing means 122 comprise a bore 126 through which the fluid can be supplied to the extractable product 20 contained in the inner space 120 . the system 101 of fig1 a - 1 c further comprises lid piercing means 128 , here embodied as protrusions , intended for piercing the lid 116 of the capsule 102 . in the shown embodiment , the lid piercing means 128 may form part of the outlet arrangement 109 . the system 101 shown in figs . a - 1 c is operated as follows for preparing a cup of coffee , wherein the extractable product is roasted and ground coffee . the capsule 102 is placed in the receptacle 106 ( see fig1 a ). the bottom piercing means are activated to pierce the bottom 112 of the capsule 102 ( see fig1 b ) for creating the entrance opening 124 . the fluid , here hot water under pressure , is supplied to the extractable product in the inner space 120 through the entrance opening 124 . 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 120 , the pressure inside the capsule 102 will rise . the rise in pressure will cause the lid 116 to deform and be pressed against the lid piercing means 128 . once the pressure reaches a certain level , the tear strength of the lid 116 will be surpassed and the lid will rupture against the lid piercing means 128 , creating exit openings 130 ( see fig1 c ). the prepared coffee will drain from the capsule 102 through the exit openings 130 and outlets 132 of the outlet arrangement 109 , and may be supplied to a container such as a cup ( not shown ). during preparation of the beverage in the system 101 shown in fig1 a - 1 c preferential flow paths may exist in the extractable product inside the inner space 120 of the capsule 102 . these preferential paths may extend from the entrance opening 124 to the exit openings 130 . one such possible preferential path is indicated with line pp in fig1 c . fig2 presents in a schematic way an embodiment of a disposable capsule according to an aspect of the invention . view a presents schematically a cross - section of the disposable capsule 20 and a corresponding isometric view thereof , whereby view b presents schematically a cross - section and a corresponding isometric view of the capsule 20 a immediately before use . referring to view a , the disposable capsule 20 comprises a chamber 22 conceived to accommodate a suitable product ( not shown ) for preparing a beverage . the chamber 22 is bounded by structures 22 a , 22 b , 22 c and 22 d , some of which may relate to external surfaces of the capsule , while the other may relate to internal surfaces of the capsule . for example , boundaries 22 a , 22 c may relate to an outer wall of the capsule , whereas boundaries 22 b , 22 d may relate to supplementary foils , membranes , tissues or the like . for example , structures 22 b , 22 d may relate to an exit and an entrance filter , respectively . the capsule may comprise further outer structures 24 , 23 which may relate to suitable protective layers , which may be implemented from a more rigid and mechanically stronger material , than material used for items 22 b , 22 d . in accordance with the invention , the chamber is provided with a displaceable body 25 , 26 conceived to provide entrance and exit openings in a controlled way . the displaceable body according to an aspect of the invention comprises two cooperating parts — an external actuator 25 and an internal body 26 , the latter being accommodated in the chamber 22 . preferably , the internal body is dimensioned to substantially match a dimension of the chamber in a direction of a fluid flow . according to the invention different modes of providing entrance and exit openings are envisaged . first , the internal body 26 may be constructed as an object having a substantial outer cross - section , see terminal area 26 a of the internal body 26 . the terminal area 26 a may be substantially flat . this may be advantageous for preventing accidental damage of the chamber 22 during mere handling of the capsule , which is not linked to a purposeful discontinuation of the layer 22 b . when a portion of the internal body 26 a is flat and covers a substantial area , that is an area comparable with a surface area of the exit area , for example , the external actuator 25 may be formed with projections 28 which are conceived to cooperate with the area 26 a for piercing the exit area 22 b . the terminal portion 26 a acts in this case as a support structure for the actuator 25 for enabling controlled piercing . secondly , the terminal portion 26 a of the internal body may comprise projections 27 . it will be appreciated that projections may be provided as isolated items running for a substantial distance from a base 26 a . alternatively , the projections may be microscopic protrusions from a massive base , see fig3 . when the internal body 26 is being pushed by the external actuator 25 , it is displaced towards the entrance area 22 d discontinuing it in a controlled manner . thirdly , it is possible that the internal body 26 comprises projections or protrusions at its both outer surfaces facing the exit area 22 b and the entrance area 22 d . in this case , the external actuator 25 may be provided with protrusions , or may be substantially flat , as a controlled discontinuation of the exit area 22 b is realized by the protrusions of the internal body . should the external actuator 25 be provided with protrusions 28 , the protrusions 28 are preferably displaced relative to counterpart protrusions of the internal body 26 . it may be advantageous to shape the internal body 26 flat at one of its terminal areas . for example , the internal body 26 may rest by its flat terminal area on the exit area 22 b upon storage . provided the internal body is a light weight member and provided the surface area of the internal body is substantially large , such arrangement may represent a safe ‘ parking ’ arrangement having a minimum risk of accidental chamber damage during storage . view b depicts in a schematic way a cross - section of a disposable capsule 20 a upon an event the external actuator has been pressed against the internal body 26 . as a result , protrusions of the internal body 27 discontinue the entrance area 22 d ′, the exit area 22 b ′ being discontinued by protrusions of the external actuator . it may be preferable that the external actuator is movably attached to the capsule , wherein an attaching member , for example bridges 29 a , 29 b are implemented as a bi - stable structure , having a first stable position for an extended state ( shown in view a ) and a second stable position for a depleted state ( see view b ). as a result the chamber 22 is capable of letting a suitable fluidum through its internal volume , as is schematically shown by f 1 , f 2 . it will be appreciated that the term fluidum may relate to at least the fluid used to prepare the beverage as well as the beverage . it will be appreciated that the internal body 26 may be dimensioned to discontinue only a wall of the internal chamber , as is schematically shown in the right portion of view b . this may be advantageous , when it is desirable that one or more structures post exit area stay intact . for example , an outer surface of the capsule 30 may be formed as a filter area 30 a , which should not be disrupted or otherwise deformed upon opening the chamber . in case when the filter 30 a corresponds to an outer surface of the capsule , the filter area may be protected by a peel - off foil ( not shown ). it will further be appreciated that the external actuator 31 may be provided with a suitable number of openings 32 for allowing a fluid inflow or a beverage outflow from the chamber . in case when the chamber is conceived to be filled with a fluid under pressure , it may be preferable to arrange a receptacle of the apparatus of the system according to the invention to maintain the capsule with the depleted actuator . for example , the receptacle may be shaped for substantially tightly fitting the capsule provided with a depleted actuator . fig3 presents in a schematic way the disposable capsule of fig2 accommodated in a receptacle of the system according to the invention . the disposable capsule 40 may comprise similar items as discussed with reference to fig2 . however , in this exemplary embodiment , the internal body 46 , arranged in the chamber 22 , is provided with a conduit 45 having lateral openings 47 . the fluid stream f 1 entering the capsule 40 may be distributed in the inner space of the chamber 22 by means of radial flows f 3 emerging from the body 46 . according to this feature creation of preferential paths in the inner space is counteracted . the internal body 46 may comprise flat terminal portions 41 , 42 , in which case creation of a macroscopic entrance openings may be enabled . alternatively one or both terminal portions 41 , 42 may be provided with suitable projections for provided a desired network of openings . 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 .
a disposable capsule for preparing a beverage suitable for consumption from an extractable product includes a chamber for enclosing an inner space containing the extractable product and a displaceable body . the chamber includes an entrance area enabling passage of a fluid towards the inner space for interacting with the extractable product for preparing the beverage and an exit area for conducting at least a portion of the beverage away from the capsule . the displaceable body is movable with respect to the entrance area and the exit area for discontinuing the entrance area and the exit area thereby enabling the chamber to pass fluidum therethrough .