EP3134334B1 - Kapsel, system zur getränkevorbereitung mittels dieser kapsel und verwendung dieser kapseln in einer maschine - Google Patents

Kapsel, system zur getränkevorbereitung mittels dieser kapsel und verwendung dieser kapseln in einer maschine Download PDF

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Publication number
EP3134334B1
EP3134334B1 EP16744558.4A EP16744558A EP3134334B1 EP 3134334 B1 EP3134334 B1 EP 3134334B1 EP 16744558 A EP16744558 A EP 16744558A EP 3134334 B1 EP3134334 B1 EP 3134334B1
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EP
European Patent Office
Prior art keywords
capsule
flange
enclosing member
annular end
end surface
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP16744558.4A
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English (en)
French (fr)
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EP3134334A1 (de
Inventor
Hielke Dijkstra
Arend Hendrik Groothornte
Erik Pieter Van Gaasbeek
Marc Henrikus Joseph Ottenschot
Ralf Kamerbeek
Armin Sjoerd Eijsackers
John Henri Flamand
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Douwe Egberts BV
Original Assignee
Koninklijke Douwe Egberts BV
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Priority to PL16744558T priority Critical patent/PL3134334T3/pl
Publication of EP3134334A1 publication Critical patent/EP3134334A1/de
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Publication of EP3134334B1 publication Critical patent/EP3134334B1/de
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    • 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

Definitions

  • the invention relates to a capsule according to the introductory portion of claim 1.
  • the invention also relates to a system for preparing a potable beverage according to the introductory portion of claim 36 and to a use of such a capsule.
  • Such a capsule such a system and such a use are known from EP-B-1 700 548 , WO2014/184653 A1 , WO2014/012779 A2 and WO2014/184652 A1 which disclose a capsule provided with a sealing structure 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 structure to provide deflection of the sealing structure, the sealing surface being inclined so that the deflection of the sealing structure is an inwards and downwards deformation of the step.
  • 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 automatic mechanism applies a force on the sealing structure 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 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 injected by the fluid injection means.
  • the sealing structure of the capsule must be arranged such that upon reaching the maximum fluid pressure in the enclosing member the sealing structure should still provide a fluid sealing contact between the enclosing member and the capsule.
  • the sealing structure 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 structure also provides a sealing contact between the enclosing member and the capsule.
  • 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.
  • the sealing structure is a member which is very critical in design. It should be able to provide a 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 structure by means of the annular end surface of the enclosing member but it should also provide a 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 annular end surface of the enclosing member to the sealing structure of the capsule.
  • the sealing structure must also be able to 'close' the radially extending open grooves to provide an effective seal.
  • a closing member of the beverage preparation device such as an extraction plate of the beverage preparation device
  • the sealing structure includes a deformable sealing ring portion of the flange, the sealing structure is integrated in the flange of the capsule, so the capsule can be manufactured quickly at low costs.
  • the sealing ring portion further includes at least one resilient layer between the layer of aluminum material and the cover, the aluminum sheet material of the sealing ring portion, which faces the annular end surface of the enclosure member when a beverage is to be prepared, is easily deformable locally at low clamping pressure to accommodate to the shape of the annular end surface of the enclosing member when the sealing structure is clamped between the annular end surface of the enclosing member and the closing member.
  • the sealing structure can accommodate to the succession of projections and recesses in circumferential sense formed by the annular end surface of the enclosing member and effectively seal, also against the recessed surface portions of the annular end surface already during an early stage of the closing of the enclosing member when the clamping pressure at which the enclosing member and the closing member are pressed against each other is relatively low.
  • the meaning of 'aluminum' is understood to also include aluminum alloy.
  • the sealing between the annular end surface of the enclosing member and the sealing ring portion of the flange to be effective for ensuring that the pressure drop over the substance in the capsule is sufficient for the desired beverage preparation process, it does not have to be hermetically fluid tight under all circumstances.
  • the seal At a liquid leakage of up to 4% and preferably not beyond 2.5 % of the liquid volume pumped through the capsule, the seal is still effective for allowing the beverage preparation apparatus to generate the desired pressure drop over the substance. Accordingly, a sealing allowing such a leakage constitutes an effective sealing.
  • the invention can also be embodied in a system according to claim 13 and in a use according to claim 16.
  • the sealing structure easily deforms locally, thereby accommodating to the shape of the annular end surface of the enclosing member when it is clamped between the annular end surface of the enclosing member and the closing member.
  • the sealing structure accommodates to the succession of projections and recesses in circumferential sense formed by the annular end surface of the enclosing member because the resilient layer is more resilient than the aluminum sheet material is compressed, allowing the aluminum sheet material to be indented accommodating to the shape of the annular end surface of the enclosure member.
  • the sealing structure effectively seals, also against the recessed surface portions of the annular end surface already during an early stage of the closing of the enclosing member, when the clamping pressure at which the enclosing member and the closing member are pressed against each other is relatively low.
  • the capsule can be manufactured particularly efficiently if the capsule body as a whole is formed of multilayer material including the aluminum sheet material and the resilient layer, the resilient layer in the flange being contiguous with the resilient layer in the side wall.
  • the resilient layer then also constitutes a liner of the capsule body obviating the need of a coating applied specifically to keep the substance to be extracted or dissolved separate from the aluminum of the capsule body.
  • the cover is adhesively attached to the resilient layer.
  • the resilient layer may then be of an oxygen barrier material or include an oxygen barrier on a side facing the cover.
  • Loss of aroma of the substance through resilient material between the cover and aluminum sheet material of the flange may also be reduced by providing that the deformable sealing ring portion of the flange includes a further layer of aluminum sheet material contiguous with the side wall and between the resilient layer and the cover.
  • the capsule body can be manufactured in a simple manner from sandwich sheet material.
  • very thin aluminum layers e.g. less than 0.04 mm
  • sandwich materials having very thin load bearing outer sheets are easily deformed locally, so that a particularly good conformability to the shape of the annular end surface of the enclosing member is achieved.
  • the resilient layer may for instance be of a polymer material. Such a material may be more resilient than the aluminum material and be provided in the form of a solid layer so that the aluminum sheet material is supported evenly.
  • the resilient layer may for instance be a cellular aluminum structure leaving empty spaces between webs of material extending transverse to the layers. Then an all aluminum capsule is obtained, which is advantageous for recycling of the capsule material after use and disposal.
  • the deformable sealing ring portion projects axially from base portions of the flange on a side of the base portions facing the enclosing member when the capsule is in the enclosing member, the deformable sealing ring portion including: an inner wall portion extending from and contiguous with an inner base portion of the flange, an outer wall portion extending from and contiguous with an outer base portion of the flange, the outer wall portion being located outward of and spaced from the inner wall portion, and a bridge portion interconnecting the inner wall portion and the outer wall portion, the bridge portion being located axially spaced from the base portions of the flange.
  • a top of the bridge portion axially most remote from the base portions of the flange is flat or has a center plane curved with a radius of curvature larger than two times a wall thickness of the top of the bridge portion.
  • a particularly easy accommodation to the shape of the annular end surface may be achieved if, the top of the bridge portion is positioned for being contacted first by the annular end portion, when the sealing ring portion is clamped between the annular end surface and the closing member of a compatible beverage preparation device.
  • the top of the bridge portion is at least partially in a zone, extending circumferentially around the center line of the capsule, the zone having inner and outer diameters in a range of 29-33 mm, more preferably 30.0-31.4 mm and most preferably 30.3-31.0 mm.
  • the deformable sealing ring portion of the flange is directly opposite of the annular end surface for first contacting a central portion of the annular end surface when the sealing ring portion is clamped between the annular end surface and the closing member of widely used and commercially available beverage preparation devices such as the Citiz, Lattisima, U, Maestria, Pixie, Inissia and Essenza.
  • the invention is in particular advantageous when in an embodiment of a capsule the capsule is filled with 5-20 grams, preferably 5-10 grams, more preferably 5-7 grams of an extractable product, such as roasted and ground coffee.
  • the outer diameter of the outwardly extending flange of the capsule is larger than the diameter of the bottom of the capsule.
  • 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 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 30-45 micrometer and more preferably 39 micrometer.
  • the thickness of the aluminum cover is smaller than the thickness of the aluminum capsule body.
  • 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.
  • 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 transverse to the central capsule body axis.
  • the outwardly extending flange comprises a curled outer edge, which is beneficial in obtaining for a satisfactory sealing with the annular end surface 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 structure 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.
  • the outwardly extending flange preferably 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.
  • 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°.
  • 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 base central portion opposite the cover having a diameter of about 8.3 mm.
  • the height of the sealing structure is at least about 0.1 mm, more preferably at least 0.2 mm and most preferably at least 0.8 mm and at most 3 mm, more preferably at most 2 mm and most preferably at most 1.2 mm.
  • 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 such high pressures a satisfactory seal between capsule and beverage preparation device can be obtained.
  • the system is arranged such that, in use, during brewing, a annular end surface of the enclosing member of the beverage preparation device exerts a force F2 on the sealing structure of the capsule to provide a 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.
  • the system is arranged such that, in use, prior to or at the start of brewing, the annular end surface of the enclosing member of the beverage preparation device exerts a force F1 on the sealing structure of the capsule to provide a sealing contact between the outwardly extending flange of the capsule and the enclosing member of the beverage preparation device, wherein F1 is in the range of 30-150 N, preferably in the range of 40-150 N, more preferably 50-100 N, when the fluid pressure P1 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.
  • 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 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 a portion of the enclosing member including the annular end surface 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 annular end surface of the enclosing member of the beverage preparation device.
  • 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.
  • 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.
  • the enclosing member 6 has a shape complementary to the shape of the capsule 2.
  • the apparatus 4 further comprises a fluid injection 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.
  • the exchangeable capsule 2 comprises a capsule body 12 of aluminum plate material, the capsule body 12 having a central capsule body axis 12A and an aluminum cover 14 hermetically sealed to the capsule body 12.
  • the aluminum capsule body 12 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.
  • the substance is 5-20 grams, preferably 5-10 grams, more preferably 5-7 grams of an extractable product, such as 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 structure 28, in Figures 1 , 3A and 3B indicated as a general box but more detailed described with reference to Figures 4-8 which sealing structure 28 is arranged at 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 structure 28 are sealingly engaged between the enclosing member 6 and the extraction plate 8.
  • a sealing structure 28 in Figures 1 , 3A and 3B indicated as a general box but more detailed described with reference to Figures 4-8 which sealing structure 28 is arranged at 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
  • the enclosing member 6 of the beverage preparation device comprises an annular element 41 having a central annular element axis 41A and a free annular end surface 30.
  • the annular end surface 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 annular end surface 30 of the annular element 41.
  • 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.
  • 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.
  • FIG. 3A and 3B An embodiment of a capsule according to the invention is shown more detailed in Figures 3A and 3B .
  • the outer diameter ODF of the outwardly extending flange 20 is larger than the diameter DB of the bottom 18 of the capsule 2.
  • 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 wall thickness of the aluminum capsule body 12 is 100 micrometer. Generally, a wall thickness of, depending on various considerations, 20 to 200 micrometer is preferred.
  • the thickness of the aluminum cover 14 is 39 micrometer, preferred thickness ranging from 15-65 micrometer and more in particular 30-45 micrometer. Preferably the thickness of the aluminum cover 14 is 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.
  • 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.
  • the sealing structure 28 is positioned between the free end of the side wall 16 of the aluminum capsule body 12 and the inner edge 43A of the curled outer edge 42 of the outwardly extending flange.
  • the sealing structure 28 is indicated as a general box, but will be described in more detail below.
  • the height of the sealing structure is preferably at least about 0.1 mm, more preferably at least 0.2 mm and most preferably at least 0.8 mm and at most 3 mm, more preferably at most 2 mm and most preferably at most 1.2 mm for providing a correct seal.
  • the aluminum capsule body 12 is truncated.
  • 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 base central portion 18A opposite the cover 14, which central portion 18A has a diameter DEE of about 8.3 mm and in which central portion 18A the entrance opening(s) 25 may be made.
  • the entrance openings may also be made in the truncated portion between the central portion 18A and the side wall 16.
  • 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 a potable beverage, in the present example coffee, the substance in the capsule being 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.
  • 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.
  • 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 annular end surface 30 of the enclosing member 6 exerts a force F1 on the sealing structure 28 of the capsule 2 to provide a sealing contact between the outwardly extending flange 20 of the capsule 2 and the enclosing member 6 of the beverage preparation device, wherein the force F1 is in the range of 30-150 N, preferably 40-150 N and more preferably 50-100N, when the fluid pressure P1 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.
  • the annular end surface 30 of the enclosing member 6 exerts a force F2 on the sealing structure 28 of the capsule 2 to provide a 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.
  • a part 6B of the 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 between the outwardly extending flange 20 and the annular end surface 30 of the enclosing member 6. This movement can take place during use, i.e. 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 annular end surface 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 F1 as discussed above may be reached if the second part 6B is in the first position with a fluid pressure P1.
  • 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.
  • the sealing structure 28 of the capsule according to the invention undergoes a plastic deformation and closely conforms to the grooves 40 of the annular end surface 30 and thus provides a 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 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.
  • a flange 20 with a sealing structure 28 and an adjacent side wall portion 16 of a capsule 2 as well as an end portion of an enclosing member 6 with an annular end surface 30 is shown.
  • a cover sheet 14 is attached to the flange 20 and hermetically closes off the capsule 2.
  • the sealing structure 28 is deformable for providing a fluid sealing contact with the annular end surface 30 if the capsule 2 is positioned in the enclosing member 6 and the enclosing member is closed by means of a closing member 8 of the beverage preparation device, such as an extraction plate, so that at least portions of the flange 20 and the sealing structure 28 are clamped between the annular end surface 30 and the closing member 8.
  • the sealing structure is formed by a deformable sealing ring portion 28 of the flange 20.
  • the sealing ring portion 28 has a layer of aluminum sheet material 44 contiguous with aluminum sheet material of the side wall 16 and a resilient layer 45 between the layer of aluminum material 44 and the cover 14.
  • the resilient layer may also be a continuous layer at the outside of the aluminum sheet material of the capsule body facing away from the cover 14 as is schematically indicated with dash-and-dot line 45'.
  • the deformable sealing ring portion 28 is integrated in the flange 20of the capsule, so the capsule 2 can be manufactured quickly at low costs. If the resilient layer 45 is located between the layer of aluminum material 44 and the cover 14, it facilitates local deformability of the surface of the aluminum sheet material of the sealing ring portion 28, which faces the annular end surface 30 of the enclosure member 6 when a beverage is to be prepared, in particular at low clamping pressures, to accommodate to the shape of the annular end surface 30 when the deformable sealing ring portion 28 is clamped between the annular end surface 30 and the closing member 8.
  • the sealing structure 28 can accommodate to the succession of projections 47 and recesses 46 in circumferential sense of the annular end surface 30 and effectively seal, also against the recessed surface portions 47 of the annular end surface 30 already during an early stage of the closing of the enclosing member 6 when the clamping pressure at which the enclosing member 6 and the closing member 8 are pressed against each other is relatively low.
  • the resilient layer 45 supports the aluminum layer 44 of the deformable sealing ring portion 28 of the flange 20 via the cover 14 against the closing member 8. However, because of the resiliency of the resilient layer, it is compressible relatively easily, so that it gives way where raised portions 47 of the annular end surface 30 are pressed against the aluminum layer 44. Because the resilient layer 44 is not, or to a lesser extent, compressed in areas opposite of the recesses 46 in the annular end surface 30, the aluminum layer 44 is indented opposite the raised portions 47 and thereby accommodates to the shape of the annular end surface 30.
  • the resilient layer 45 is preferably thicker than the aluminum layer 44, to facilitate local deformation of the aluminum layer 44 and to allow deformation of a magnitude sufficient to accommodate to encountered differences in level between the recessed and raised portions of the annular end surface.
  • the cover 14 is sealed directly to the resilient layer 45, so that the capsule can be manufactured in a simple manner.
  • the resilient layer 45 may then be of an oxygen barrier material or include an oxygen barrier on a side facing the cover, the oxygen material for instance having an oxygen permeability of less than 1 cc/cm3 /24h.
  • the resilient layer 45 may for instance be of a polymer material and may be an elastomeric and/or plastomeric material. If the material is more resilient than the aluminum material (e.g. 10-100 Durometer (ASTM D2240 type A scale) and more preferably 20-75 Durometer (ASTM D2240 type A scale), it may be provided in the form of a solid layer so that the aluminum sheet material is supported evenly.
  • the aluminum material e.g. 10-100 Durometer (ASTM D2240 type A scale) and more preferably 20-75 Durometer (ASTM D2240 type A scale
  • the resilient layer 45 may for instance be a cellular aluminum structure (e.g. a honeycomb structure) leaving empty spaces between webs of material extending transverse to the layers. Then a substantially all aluminum capsule may be obtained, which is advantageous for recycling of the capsule material after use and disposal.
  • a cellular aluminum structure e.g. a honeycomb structure
  • the resilient layer 45 in the flange 20 may be contiguous with a resilient layer 45' of the side wall 16.
  • the resilient layer 45' then also constitutes a liner inside the capsule body obviating the need of a coating applied specifically to keep the substance to be extracted or dissolved separate from the aluminum of the capsule body.
  • a flange area of further example of a capsule 102 according to the invention is shown.
  • loss of aroma of the substance in the capsule 102 through resilient material 145 between the cover 14 and aluminum sheet material 144 of the flange 120 is avoided or at least reduced by providing that the deformable sealing ring portion 128 of the flange 120 includes a further layer 148 of aluminum sheet material contiguous with the side wall 116 and between the resilient layer 144 and the cover 114.
  • the capsule body as a whole is formed of a layered material with layers 144, 148 of aluminum material on opposite sides of the resilient layer 145 and the further layer 148 in the flange 120 is contiguous with the further layer 148' of aluminum material in the side wall 116.
  • Such a capsule body can be manufactured in a simple manner from sandwich sheet material.
  • the deformable sealing ring portion 128 projects axially from base portions 149, 150 of the flange 120, to which base portions the cover 114 is attached, on a side of the base portions 149, 150 facing the enclosing member 6 when the capsule 2 is in the enclosing member 6.
  • the deformable sealing ring portion 280 has an inner wall portion 151 extending from and contiguous with an inner base portion 149 of the flange 120 and an outer wall portion 152 extending from and contiguous with an outer base portion 150 of the flange 120.
  • the outer wall portion 152 is located outward of and spaced from the inner wall portion 151.
  • a bridge portion 153 interconnects the inner wall portion 151 and the outer wall portion 152 and is located axially spaced from the base portions 149, 150 of the flange 120. This allows the layered material of the sealing ring portion 128 to deform as a whole when clamped between the annular end surface 30 of the enclosing member 6 and the closing member 8.
  • a top 154 of the bridge portion 153 axially most remote from the base portions 149, 150 is flat or has a center plane curved with a radius of curvature larger than two times a wall thickness of the top 154 of the bridge portion 153, a particularly high capability of accommodation to the shape of the annular end surface 30 of the enclosing member 6 is achieved.
  • the wall thicknesses are shown larger than they are in reality to allow distinguishing the several layers.
  • the top 154 of the bridge portion 153 is positioned for being contacted first by the annular end portion 30, when the sealing ring portion 128 is clamped between the annular end surface 30 and the closing member 8 of a compatible beverage preparation device.
  • Fig. 6-8 show a flange area of a third example of a capsule 202 according to the invention.
  • the material of which the capsule body as a whole is formed is a sandwich material with a resilient core 245 and aluminum outer layers 244, 248.
  • the deformable sealing ring portion 228 of the flange 220 is flat and the core 245 is made of a honeycomb structure leaving empty spaces 255 between webs 256 of material extending transverse to the layers 244, 245, 248.
  • a sandwich material very thin aluminum layers (e.g. less than 0.04 mm) suffice for providing the required strength and stiffness of the capsule body as a whole.
  • sandwich materials having very thin load bearing outer sheets are easily deformed locally, as is illustrated by Figs. 7 and 8 , so that a particularly good conformability to the shape of the annular end surface 30 of the enclosing member is achieved.
  • the annular end surface 30 has grooves (recessed portions) 246 and projecting or raised portions 247 between each pair of grooves 246.
  • the raised portions 47 of the annular end portion 30 are pressed into the deformable sealing ring portion 228 ( Fig. 8 ) locally deforming the aluminum layer 244 and adjacent portions of the resilient layer 245 while areas of the aluminum layer 244 in contact with the recessed portions 46 and adjacent portions of the resilient layer 245 are not deformed or deformed to a lesser extent.
  • local compressibility of the resilient layer 245 and local deformability of the aluminum layer facing the annular end surface 30 allow the deformable sealing ring portion 228 to accommodate to the shape, an in particular the undulations, in the annular end surface 30.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Apparatus For Making Beverages (AREA)

Claims (16)

  1. Kapsel, enthaltend eine Substanz zur Herstellung eines trinkbaren Getränks durch Extraktion und/oder Lösen der Substanz durch Zuführen eines unter Druck stehenden Fluids in die Kapsel (2; 102; 202), wobei die Kapsel umfasst:
    einen Aluminiumkapselkörper (12) mit einer zentralen Kapselkörperachse (12A), wobei der Aluminiumkapselkörper einen Boden (18), eine Seitenwand (16; 116), einen sich nach außen erstreckenden Flansch (20; 120; 220) und eine Dichtungskonstruktion (28; 128; 228) an dem Flansch umfasst; und
    eine Deckplatte (14; 114), die an dem Flansch (20; 120; 220) befestigt ist und die Kapsel (2; 102; 202) hermetisch abschließt;
    wobei die Dichtungskonstruktion (28; 128; 228) zum Bereitstellen eines Fluiddichtungskontakts mit einer ringförmigen Stirnfläche (30) eines Umschließungselements (6) einer Getränkezubereitungsvorrichtung verformbar ist, wenn die Kapsel (2; 102; 202) in dem Umschließungselement (6) angeordnet ist und das Umschließungselement mittels eines Verschlusselements (8) der Getränkezubereitungsvorrichtung, wie z. B. einer Extraktionsplatte der Getränkezubereitungsvorrichtung, verschlossen ist, wobei zumindest Abschnitte des Flansches (20; 120; 220) und die Dichtungskonstruktion (28; 128; 228) zwischen der ringförmigen Stirnfläche (30) und dem Verschlusselement (8) eingespannt sind, wobei die Stirnfläche (30) des ringförmigen Elements optional mit einer Vielzahl von sich radial erstreckenden offenen Nuten (40) versehen ist;
    wobei die Dichtungskonstruktion (28; 128; 228) einen verformbaren Dichtringabschnitt des Flansches (20; 120; 220) einschließt, wobei der Dichtringabschnitt eine an die Seitenwand angrenzende Schicht aus Aluminiumblechmaterial (44; 144; 244) und mindestens eine elastische Schicht (45; 145; 245) umfasst;
    dadurch gekennzeichnet, dass die mindestens eine elastische Schicht (45; 145; 245) zwischen der Schicht aus Aluminiummaterial und der Deckplatte (14; 114) angeordnet ist und eine Dicke aufweist, die größer ist als die Dicke der Schicht aus Aluminiumblechmaterial (44; 144; 244).
  2. Kapsel nach Anspruch 1, wobei der Kapselkörper (12) insgesamt aus mehrschichtigem Material gebildet ist, das das Aluminiumblechmaterial und die elastische Schicht (45; 145; 245) umfasst, wobei die elastische Schicht in dem Flansch an die elastische Schicht (45; 145; 245) in der Seitenwand angrenzt.
  3. Kapsel nach Anspruch 1 oder 2, wobei die Abdeckung haftend mit der elastischen Schicht (45; 145; 245) verbunden ist, wobei die elastische Schicht aus einem sauerstoffundurchlässigen Material besteht oder eine Sauerstoffsperre auf einer Seite gegenüber der Deckplatte (14; 114) einschließt.
  4. Kapsel nach Anspruch 1 oder 2, wobei der verformbare Dichtringabschnitt des Flansches (120; 220) eine weitere Schicht aus Aluminiumblechmaterial (148; 248) angrenzend an die Seitenwand und zwischen der elastischen Schicht (145; 245) und der Deckplatte (114) umfasst.
  5. Kapsel nach den Ansprüchen 2 und 4, wobei das mehrschichtige Material, aus dem der Kapselkörper (12) als Ganzes gebildet ist, ferner eine weitere Schicht aus Aluminiumblechmaterial (148; 248) umfasst, wobei sich die Schichten aus Aluminiummaterial auf gegenüberliegenden Seiten der elastischen Schicht (145; 245) und der weiteren Schicht in dem Flansch (120; 220), angrenzend an die weitere Schicht aus Aluminiummaterial in der Seitenwand, befinden.
  6. Kapsel nach einem der vorhergehenden Ansprüche, wobei die elastische Schicht (145) aus einem Polymermaterial besteht.
  7. Kapsel nach einem der Ansprüche 1 bis 5, wobei die elastische Schicht (245) eine zelluläre Aluminiumstruktur ist, die Leerräume zwischen Materialbahnen lässt, die sich quer zu den Schichten erstrecken.
  8. Kapsel nach einem der vorhergehenden Ansprüche, wobei der verformbare Dichtringabschnitt des Flansches (120) axial von Basisabschnitten des Flansches (120) vorsteht, wobei an den Basisabschnitten die Deckplatte (114) auf einer dem Umschließungselement (6) zugewandten Seite der Basisabschnitte befestigt ist, wenn sich die Kapsel (102) in dem Umschließungselement befindet, wobei der verformbare Dichtringabschnitt umfasst:
    einen Innenwandabschnitt, der sich von einem inneren Basisabschnitt des Flansches (120) erstreckt und an diesen angrenzt;
    einen Außenwandabschnitt, der sich von einem äußeren Basisabschnitt des Flansches (120) erstreckt und an diesen angrenzt, wobei sich der Außenwandabschnitt außerhalb von und in einem Abstand zu dem Innenwandabschnitt befindet; und
    einen Brückenabschnitt, der den Innenwandabschnitt mit dem Außenwandabschnitt verbindet, wobei sich der Brückenabschnitt axial in einem Abstand von den Basisabschnitten des Flansches (120) befindet.
  9. Kapsel nach Anspruch 8, wobei in der Querschnittsansicht eine Spitze des Brückenabschnitts, die axial am weitesten von den Basisabschnitten des Flansches (120) entfernt ist, flach ist oder eine Mittelebene aufweist, die mit einem Krümmungsradius gekrümmt ist, der größer als das Doppelte einer Wanddicke der Oberseite des Brückenabschnitts ist.
  10. Kapsel nach einem der vorhergehenden Ansprüche, wobei der verformbare Dichtringabschnitt des Flansches (20; 120; 220) angeordnet ist, um zuerst durch den ringförmigen Endabschnitt kontaktiert zu werden, wenn der Dichtringabschnitt zwischen der ringförmigen Stirnfläche (30) und dem Verschlusselement (8) einer kompatiblen Getränkezubereitungsvorrichtung eingespannt ist.
  11. Kapsel nach Anspruch 10, wobei der verformbare Dichtringabschnitt des Flansches (20; 120; 220) zumindest teilweise in einer Zone ist, die sich in Umfangsrichtung um die Mittellinie der Kapsel (2; 102; 202) erstreckt, wobei die Zone Innen- und Außendurchmesser in einem Bereich von 29 - 33 mm, mehr bevorzugt 30,0 - 31,4 mm und am meisten bevorzugt 30,3 - 31,0 mm, aufweist.
  12. Kapsel nach einem der vorstehenden Ansprüche, wobei der Dichtringabschnitt und der Rest des Kapselkörpers aus dem gleichen Plattenmaterial hergestellt sind.
  13. System zum Zubereiten eines trinkbaren Getränks aus einer Kapsel unter Verwendung eines unter Druck in die Kapsel (2; 102; 202) geführten Fluids, umfassend:
    eine Getränkezubereitungsvorrichtung, umfassend ein Umschließungselement (6) zum Aufnehmen der Kapsel (2; 102; 202), wobei das Umschließungselement ein Mittel zum Einspritzen von Fluid zum Zuführen von Fluid unter Druck in die Kapsel umfasst, wobei die Getränkezubereitungsvorrichtung ferner ein Verschlusselement (8), z. B. eine Extraktionsplatte, zum Schließen des Umschließungselements (6) der Getränkezubereitungsvorrichtung umfasst, wobei das Umschließungselement (6) ein ringförmiges Ende mit einer ringförmigen Stirnfläche (30) aufweist, wobei die ringförmige Stirnfläche optional mit einer Vielzahl von sich radial erstreckenden offenen Nuten (40) versehen ist;
    eine Kapsel (2; 102; 202), enthaltend eine Substanz zur Herstellung eines trinkbaren Getränks durch Extraktion und/oder Lösen der Substanz durch Zuführen eines unter Druck stehenden Fluids in die Kapsel, wobei die Kapsel umfasst:
    einen Aluminiumkapselkörper (12) mit einer zentralen Kapselkörperachse (12A), wobei der Aluminiumkapselkörper einen Boden (18), eine Seitenwand (16; 116), einen sich nach außen erstreckenden Flansch (20; 120; 220) und eine Dichtungskonstruktion (28; 128; 228) an dem Flansch umfasst; und
    eine Deckplatte (14; 114), die an dem Flansch (20; 120; 220) und die Kapsel (2; 102; 202) hermetisch abschließt;
    wobei die Dichtungskonstruktion (28; 128; 228) verformbar ist und im Fluiddichtungskontakt mit der ringförmigen Stirnfläche (30) steht, wenn die Kapsel (2; 102; 202) in dem Umschließungselement (6) angeordnet ist und das Umschließungselement mittels des Verschlusselements geschlossen ist, wobei zumindest Abschnitte des Flansches (20; 120; 220) und die Dichtungskonstruktion (28; 128; 228) zwischen der ringförmigen Stirnfläche (30) und dem Verschlusselement (8) eingespannt sind;
    wobei die Dichtungskonstruktion (28; 128; 228) einen verformbaren Dichtringabschnitt des Flansches (20; 120; 220) einschließt, wobei der Dichtringabschnitt eine an die Seitenwand angrenzende Schicht aus Aluminiumblechmaterial (44; 144; 244) und mindestens eine elastische Schicht (45; 145; 245) umfasst;
    dadurch gekennzeichnet, dass die mindestens eine elastische Schicht (45; 145; 245) zwischen der Schicht aus Aluminiummaterial und der Deckplatte (14; 114) angeordnet ist und eine Dicke aufweist, die größer ist als die Dicke der Schicht aus Aluminiumblechmaterial (44; 144; 244).
  14. System nach Anspruch 13, wobei in der Querschnittsansicht der verformbare Dichtringabschnitt des Flansches (20; 220) zentral relativ zu der ringförmigen Stirnfläche (30) angeordnet ist, um zuerst einen Mittelabschnitt der ringförmigen Stirnfläche zu berühren, wenn der Dichtringabschnitt zwischen der ringförmigen Stirnfläche und dem Verschlusselement (8) eingespannt ist.
  15. System nach Anspruch 13 oder 14, wobei die Kapsel (2; 102; 202) eine Kapsel nach einem der Ansprüche 2 bis 12 ist.
  16. Verwendung einer Kapsel nach einem der Ansprüche 1 bis 12 in einer Getränkezubereitungsvorrichtung, die ein Umschließungselement (6) zum Aufnehmen der Kapsel (2; 102; 202) umfasst, wobei das Umschließungselement umfasst: ein Mittel zum Einspritzen von Fluid zum Zuführen von Fluid unter Druck in die Kapsel, wobei die Getränkezubereitungsvorrichtung ferner ein Verschlusselement (8), z. B. eine Extraktionsplatte, zum Schließen des Umschließungselements der Getränkezubereitungsvorrichtung umfasst, wobei das Umschließungselement (6) ein ringförmiges Ende mit einer ringförmigen Stirnfläche (30) aufweist, wobei die ringförmige Stirnfläche optional mit einer Vielzahl von sich radial erstreckenden offenen Nuten (40) versehen ist, wobei die Kapsel in dem Umschließungselement (6) der Getränkezubereitungsvorrichtung angeordnet ist, und das Umschließungselement mittels eines Verschlusselements (8) der Getränkezubereitungsvorrichtung verschlossen ist, und mindestens ein Abschnitt der Dichtungskonstruktion zwischen dem Umschließungselement und dem Verschlusselement (8) der Getränkezubereitungsvorrichtung eingespannt ist, wodurch die Dichtungskonstruktion in dichtenden Kontakt mit der ringförmigen Stirnfläche (30) gebracht wird.
EP16744558.4A 2015-05-15 2016-05-13 Kapsel, system zur getränkevorbereitung mittels dieser kapsel und verwendung dieser kapseln in einer maschine Active EP3134334B1 (de)

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PL16744558T PL3134334T3 (pl) 2015-05-15 2016-05-13 Kapsułka, system do przyrządzania napoju z takiej kapsułki i zastosowanie takiej kapsułki w urządzeniu do przyrządzania napoju

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NL2015050353 2015-05-15
PCT/NL2016/050347 WO2016186493A1 (en) 2015-05-15 2016-05-13 A capsule, a system for preparing a potable beverage from such a capsule and use of such a capsule in a beverage preparation device

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PL3307647T3 (pl) 2015-06-10 2020-01-31 K-Fee System Gmbh Kapsułka porcjowa z trójwarstwową włókniną
WO2017009369A1 (de) 2015-07-13 2017-01-19 K-Fee System Gmbh Filterelement mit einer ausnehmung
MX2018002991A (es) 2015-09-18 2018-05-02 K Fee System Gmbh Adaptador para una capsula monodosis.
EP3625151A1 (de) * 2017-05-19 2020-03-25 K-fee System GmbH Portionskapsel zur zubereitung eines getränks in einer getränkeherstellungsmaschine und verfahren zur herstellung einer portionskapsel
GB201720894D0 (en) * 2017-11-08 2018-01-31 Gort-Barten Alex Beverage capsule
TW202023919A (zh) * 2018-09-14 2020-07-01 瑞士商雀巢製品股份有限公司 用於飲料製備之具有一體地形成的密封部件之膠囊
GB2600074B (en) * 2018-12-21 2024-02-28 Alexander Charles Gort Barten Beverage capsule
GB2584610B (en) * 2019-05-07 2023-02-15 Alexander Charles Gort Barten Beverage capsule

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ATE347837T1 (de) 2004-10-25 2007-01-15 Nestec Sa Kapsel mit dichtungsmitteln
PT1849715E (pt) * 2006-04-24 2009-08-06 Nestec Sa Cápsula para preparação de uma bebida com um elemento vedante aí ligado e método de produção da mesma
EP2882670B1 (de) * 2012-07-16 2021-03-17 Tuttoespresso S.r.l. Kapsel mit verbessertem dichtungselement, system zum getränksvorbereitung und verfahren zur herstellung eines getränkes
GB201308929D0 (en) * 2013-05-17 2013-07-03 Kraft Foods R & D Inc A beverage preparation system, a capsule and a method for forming a beverage
US10273076B2 (en) * 2013-05-17 2019-04-30 Koninklijke Douwe Egberts B.V. Beverage preparation system, a capsule and a method for forming a beverage

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DK3134334T3 (da) 2019-06-11
NL2016783B1 (en) 2016-12-30
ES2728752T3 (es) 2019-10-28
NL2016783A (en) 2016-11-24
PL3134334T3 (pl) 2019-09-30
EP3134334A1 (de) 2017-03-01
WO2016186493A1 (en) 2016-11-24
PT3134334T (pt) 2019-06-14

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