• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A capsule containing a substance for the preparation of a beverage by supplying a fluid under pressure into the capsule. The capsule has an aluminum capsule body with an outwardly extending flange and a cover sheet attached to the flange and hermetically closing off the capsule. A deformable sealing ring portion of the flange projects axially from base portions of the flange, to which said cover is attached. The deformable sealing ring portion has 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 said flange and a bridge portion interconnecting the inner wall portion and the outer wall portion. The bridge portion is located axially spaced from the base portions of the flange. A support member is arranged between the inner and outer wall portions.
    公开号:NL2016778A
    申请号:NL2016778
    申请日:2016-05-13
    公开日:2016-11-24
    发明作者:Dijkstra Hielke；Hendrik Groothornte Arend；Sjoerd Eijsackers Armin；Kamerbeek Ralf；Pieter Van Gaasbeek Erik；Henrikus Joseph Ottenschot Marc；Henri Flamand John
    申请人:Douwe Egberts Bv；
    IPC主号:
    专利说明:

    Title: A capsule, a system for preparing a potable beverage from such a capsule and use of such a capsule in a beverage preparation device
    The invention relates to a capsule 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 38 and to a use of such a capsule.
    Such a capsule, such a system and such a use are known from EP-B-l 700 548, which discloses a capsule provided with a sealing structure having the shape of a step, i.e. a sudden increase of the diameter of the sidewall 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. Furthermore in the known system the enclosing member comprises a capsule holder and a manually operated or an automatic mechanism for relative displacement of the enclosing member and the capsule holder. The manually operated or 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. If the pressure of the fluid increases, the force between the sealing structure of the capsule and the annular end surface of the enclosing member increases too and thereby the force between the sealing structure of the capsule and the annular end surface of the enclosing member increases also. Such a system is described further on. 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. However, 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. If at the start of brewing, there would not exist a sealing contact between the capsule and the enclosing member, leakage will occur.
    However, if leakage occurs there is a real chance that the pressure in the enclosing member and outside the capsule will not sufficiently increase for increasing the force on the sealing structure by means of the annular end surface of the enclosing member if the manually operated or automatic mechanism moves the enclosing member towards the capsule holder. Only if there is a sufficient initial sealing, the pressure in the enclosing member will increase whereby also the force of the annular end surface of the enclosing member acting on the sealing structure of the capsule will increase for providing a sufficient sealing contact at also the increased fluid pressure. Moreover, this increased fluid pressure outside the capsule also provides an increased fluid pressure inside the capsule, which is essential if the capsule is provided with a cover, which is arranged to tear open on relief members of the capsule holder (also called an extraction plate) of the beverage preparation device under the influence of fluid pressure in the capsule.
    It follows from the above that the sealing 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. In particular when the annular end surface of the enclosing member is provided with radially extending open grooves which act as air inlet passage once the force between the enclosing member and the capsule holder is released so that it is easier for a user to take out the capsule, the sealing structure must also be able to ‘close’ the radially extending open grooves to provide an effective seal.
    It is an object of the invention to provide a capsule that reliably seals against the annular end surface of an enclosing member of a beverage preparation device if the capsule is positioned in the enclosing member of the beverage preparation device and the enclosing member is closed by means of a closing member of the beverage preparation device, such as an extraction plate of the beverage preparation device, a portion of the outwardly extending flange of the capsule and the sealing structure of the capsule being clamped between the annular end surface of the enclosing member and the closing member of the beverage preparation device, even in case of an enclosing member of which the annular end surface is provided with radially extending open grooves and which can still be manufacture at low costs.
    This object is achieved by providing a capsule according to claim 1.
    Because the sealing structure includes a deformable sealing ring portion of the flange, the sealing ring portion projecting axially from base portions of the flange, to which the cover is attached, on a side of the base portions opposite of the cover, the sealing structure is integrated in the flange of the capsule, so the capsule can be manufactured quickly at low costs.
    Because the deformable sealing ring portion of the flange has at least one support member between the inner and outer wall portions, the bridge portion can be of a relatively easily deformable design that allows local deformation of the aluminum sheet material of the bridge portion already at low clamping pressure to accommodate to the shape of the annular end surface of the enclosing member when clamped between the annular end surface of the enclosing member and the closing member, while the support member ensures that at higher clamping pressures enough counter pressure is exerted to reliably seal against a higher pressure drop over the seal. Even in case of an enclosing member of which the annular end surface is provided with radially extending open grooves, 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. Thus, the sealing structure effectively seals, also against the recessed surface portions of the annular end surface, both 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 and the pressure drop over the seal is low, and during a final 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 high and the pressure drop over the seal is high. In the present context, the meaning of 'aluminum' is understood to also include aluminum alloy.
    It is noted that for 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. 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 38 and in a use according to claim 49. In operation of such a system and in such a use, the bridge portion 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. More in particular, the sealing structure accommodates to the succession of projections and recesses in circumferential sense formed by the annular end surface of the enclosing member and effectively seals, also against the recessed surface portions of the annular end surface both 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 and the pressure drop over the seal is low and during a final 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 high and the pressure drop over the seal is high. A particularly easy deformation of the bridge portion and accordingly a high degree of conformability to the shape of the annular end surface of the enclosing member can be achieved if the deformable sealing ring portion and the bridge portion are positioned and have a widths such that the annular end portion contacts the deformable sealing ring portion between the inner and outer wall portions if the capsule is positioned in the enclosing member and the enclosing member is closed by means of the closing member of a compatible beverage preparation device such that at least portions of the sealing structure are clamped between the annular end surface and the closing member.
    The support member or support members may be of elastomeric and/or plastomeric material. In such a material adjacent portions may be deformed easily to highly different degrees, so that it easily accommodates to variations in circumferential sense of the degree of deformation resulting from successive raised and recessed portions of the annular end surface of the enclosing member pressing against the deformable sealing ring portion.
    For allowing relatively large deformations, the support member or support members may be of a compressible foam material.
    Alternatively, the support member or support members may be a spring member or spring members. Thus a high degree of resiliency can be achieved with a relatively stiff material, such as a metal. This allows the support member to be of for instance aluminum, so that it can be recycled after use and disposal together with the capsule body and with the cover, if the cover is of aluminum as well.
    If a plurality of support members is arranged in circumferential succession, each support member having a length equal to or smaller than a pitch between successive grooves in the annular end surface of the enclosing member of a compatible beverage preparation device, successive support members can deform substantially independently of each other, so that the support members do not hinder circumferentially adjacent sections of the sealing ring portion of the flange to be deformed to widely varying degrees. Accordingly, a particularly high degree of conformability can be achieved. A high degree of conformability to the shape of the annular end surface and accordingly a particularly effective and reliable sealing already at low sealing pressure can be achieved if in cross-sectional view, a top of the bridge portion axially most remote from the base flange portions 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.
    For a good conformability to the shape of the annular end surface it is further advantageous if at least a portion of the top of the bridge portion has a reduced wall thickness smaller than a wall thickness of the inner and outer wall portions.
    If the capsule body has a coating to at least one side, leaving out the coating in at least the portion of the top of the bridge portion having a reduced wall thickness reduces the risk of the coating being damaged or becoming unstuck during relatively large deformations occurring when the wall thickness is reduced during manufacturing. The coating may also be removed while reducing the wall thickness during manufacturing, for instance if reducing the wall thickness involves removing wall material. A further enhanced sealing effect can be achieved if the uncoated portion of the bridge portion is on a side of the flange opposite of the cover and has a textured surface. A texture in the surface can further improve the conformability during early stages of clamping, when the sealing pressure is still low, because clamping force is transferred via raised portions of the texture only, so that at the raised portions a higher contact pressure is exerted than would be exerted over a full smooth contact surface. A particularly improved sealing effect can be achieved if the textured surface includes ridges and valleys extending in circumferential sense of the flange, because early conformation to the shape of the annular end surface is then achieved in generally annular areas or ring sectors extending mainly in circumferential sense.
    The invention can also be embodied in a method according to claim 48 for manufacturing such a capsule. The coating is efficiently removed from the portion of the flange of which the wall thickness is to be reduced prior to or during reducing the wall thickness. A particularly efficient manufacturing of the reduced wall thickness can be achieved if the coating is removed from the portion of the flange of which the wall thickness is to be reduced during a material removal step for removing wall material for reducing the wall thickness. 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 forms a rounded or flat crest extending circumferentially around the center line of the capsule. By providing that the crest formed by the top of the bridge portion has a diameter of 29-33 mm, more preferably 30.0-31.4 mm and most preferably 30.3-31.0 mm, the top of the bridge portion is located centrally relative to 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.
    In an embodiment of a capsule according to the invention, which is, in particular easy to manufacture the outer diameter of the outwardly extending flange of the capsule is larger than the diameter of the bottom of the capsule. Preferably, the outer diameter of the outwardly extending flange is approximately 37.1 mm and the diameter of the bottom of the capsule is about 23.3 mm.
    The invention is in particular advantageous when in an embodiment of a capsule the thickness of the plate material 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.
    In an embodiment of a capsule according to the invention the thickness of the aluminum cover is smaller than the thickness of the aluminum capsule body.
    In a further embodiment of a capsule according to the invention the aluminum cover is arranged to tear open on a closing member of the beverage preparation device, such as an extraction plate of the beverage preparation device under the influence of fluid pressure in the capsule.
    In an embodiment of a capsule according to the invention which is in particular easy to manufacture the sidewall of the aluminum capsule body has a free end opposite the bottom, the outwardly extending flange extending from the free end of the sidewall in a direction at least substantially transverse to the central capsule body axis. Preferably, the outwardly extending flange comprises a curled outer edge, which is beneficial in obtaining for a satisfactory sealing with the 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 sidewall of the aluminum capsule body and an inner edge of the curled outer edge of the outwardly extending flange to obtain a still further satisfactory sealing.
    To ensure that the curled outer edge does not interfere with operation of a wide variety of commercially available and future beverage preparation apparatuses, the outwardly extending flange has a largest radial cross-sectional 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 sidewall of the aluminum capsule body is about 29.5 mm. The distance between the free end of the sidewall of the aluminum capsule body and an outermost edge of the outwardly extending flange can be about 3.8 millimeter. The preferred height of the aluminum capsule body is about 28.4 mm.
    In an embodiment of a capsule according to the invention which after use is easier for a user to take out of a beverage preparation device the aluminum capsule body is truncated, wherein preferably the sidewall of the aluminum capsule body encloses an angle with a line transverse to the central capsule body axis of about 97.5°.
    In an advantageous embodiment of a capsule according to the invention the bottom of the aluminum capsule body has a largest inner diameter of about 23.3 mm. It is preferred that the bottom of the aluminum capsule body is truncated, preferably having a bottom height of about 4.0 mm and that the bottom further has a generally flat central portion opposite the cover having a diameter of about 8.3 mm.
    In practically all cases a satisfactory seal can be obtained in an embodiment of a capsule according to the invention in which 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.
    Regarding the preferred embodiments of the system as mentioned in the dependent claims which relate to the same features as the features of the dependent claims of the capsule reference is made to the above.
    The invention is particularly suitable in a system according to the invention wherein, in use, the maximum fluid pressure in the enclosing member of the beverage preparation device is in the range of 6-20 bar, preferably between 12 and 18 bar. Even at such high pressures a satisfactory seal between capsule and beverage preparation device can be obtained.
    Preferably the system is arranged such that, in use, during brewing, the 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. In particular 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 FI 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 FI is in the range of 30-150 N preferably in the range of 40-150 N, more preferably 50-100 N, when the fluid pressure PI in the enclosing member of the beverage preparation device outside the capsule is in the range of 0.1-4 bar, preferably 0.1-1 bar.
    In an embodiment of a system according to the invention wherein the plurality of radially extending open grooves are uniformly spaced relative to each other in tangential direction of the annular end surface of the annular element of the beverage preparation device so that it is easier for a user to take out the capsule while a satisfactory seal between capsule and beverage preparation device can still be provided.
    In an advantageous embodiment of a system according to the invention the longest tangential width of each groove (top to top, i.e. equal to the groove to groove pitch) is 0.9 - 1.1 mm, preferably 0.95 to 1.05 mm, more preferably 0.98 to 1.02 mm, wherein a maximal height of each groove in an axial direction of the enclosing member of the beverage preparation device is 0.01 - 0.09 mm, preferably 0.03 to 0.07 mm, more preferably 0.045 to 0.055 mm, most preferred 0.05 mm and wherein the number of grooves is 90 to 110, preferably 96. The radial width of the annular end surface at the location of the grooves may for instance be 0.05- 0.9 mm, preferably 0.2- 0.7 mm and more preferably 0.3 - 0.55 mm.
    The invention is in particular suitable when applied to an embodiment of 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 the enclosing member of the beverage preparation device can move relative to the closing member of the beverage preparation device under the effect of the pressure of the fluid in the enclosing member of the beverage preparation device towards the closing member of the beverage preparation device for applying the maximum force between the flange of the capsule and the annular end surface of the enclosing member of the beverage preparation device.
    Further aspects, effects and details of the invention will now be further described with reference to, non-limiting, examples shown in the drawing, in which:
    Fig. 1 shows a schematic representation of an embodiment of a system according to the invention;
    Fig. 2 in a perspective view shows an embodiment of a beverage preparation device of a system according to the invention showing the annular end surface of the enclosing member of the beverage preparation device with the plurality of radially extending open grooves;
    Fig. 3A in cross section shows an embodiment of a capsule according to the invention before use;
    Fig. 3B shows an enlarged detail of a the capsule of Fig. 3A showing the outwardly extending flange and the sealing structure;
    Fig. 3C shows an enlarged detail of the outwardly extending flange of the capsule in Figs. 3A and 3B after use;
    Fig. 4 shows a schematic cross-sectional view along a plane through the centerline of the capsule of a flange area of a first example of a capsule according to the invention;
    Fig. 5 shows a schematic cross-sectional view of a section of a flange area of the capsule of Fig. 4 along a plane V-V in Fig. 4, the plane being cylindrical and coaxial with the capsule; and
    Fig. 6 shows a schematic cross-sectional view along a plane through the centerline of the capsule of a flange area of a second example of a capsule according to the invention.
    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 sealed capsule 2 and a beverage preparation device 4. The device 4 comprises enclosing member 6 for holding the capsule 2. The device 4 further comprises a closing member, such as an extraction plate, 8 for supporting the capsule 2.
    In Fig. 1 a gap is drawn between the capsule 2, the enclosing member 6 and the extraction plate 8 for clarity. It will be appreciated that, in use, the capsule 2 may lie in contact with the enclosing member 6 and the extraction plate member 8. Commonly, the enclosing member 6 has a shape complementary to the shape of the capsule 2. The apparatus 4 further comprises a fluid 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.
    In the example shown in Fig. 1, the exchangeable capsule 2 has an aluminum capsule body 12 having a central capsule body axis 12A and an aluminum cover 14 hermetically sealing an open side of the capsule body 12. In this example, the aluminum capsule body 12 comprises a sidewall 16, a bottom 18 closing the sidewall 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 sidewall 16, the bottom 18 and the cover 14 enclose an inner space 22 comprising a substance for the preparation of a potable beverage by extracting and/or dissolving the substance. Preferably the substance 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 Figs. 1, 3A and 3B indicated as a general box but more detailed described with reference to Figs. 4-6, 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.
    As shown in Fig. 2 the enclosing member 6 of the beverage preparation device comprises an annular element 41 having a central annular element axis 41A and a free 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. The longest tangential width of each groove 40 is 0.9 - 1.1 mm, preferably 0.95 to 1.05 mm, more preferably 0.98 to 1.02 mm, wherein a maximal height of each groove 40 in an axial direction of the enclosing member 6 is 0.01 - 0.09 mm, preferably 0.03 to 0.07 mm, more preferably 0.045 to 0.055 mm, and most preferred 0.05 mm. The number of grooves 40 lies in the range of 90 to 110, preferably 96. 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.
    An embodiment of a capsule according to the invention is shown more detailed in Figs. 3A and 3B. In the shown embodiment the outer diameter ODF of the outwardly extending flange 20 is larger than the diameter DB of the bottom 18 of the capsule 2. In the shown embodiment the outer diameter ODF of the outwardly extending flange 20 is approximately 37.1 mm and the diameter DB of the bottom 18 is about 23.3 mm.
    In the present example, 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.
    In the shown embodiment 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 sidewall 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 sidewall 16 of the aluminum capsule body 12 is about 29.5 mm. The outwardly extending flange 20 extends from that free end 42 in a direction at least substantially transverse to the central capsule body axis 12A. The outwardly extending flange 20 comprises a curled outer edge 43, which is beneficial for obtaining a seal between the capsule and the enclosing member. In the shown embodiment the curled outer edge 43 of the outwardly extending flange 20 has a largest radial cross-sectional dimension of about 1.2 millimeter. The distance DIF between the free end 42 of the sidewall 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 sidewall 16 of the aluminum capsule body 12 and an outermost edge 43B of the outwardly extending flange 20 is about 3.8 millimeter.
    As shown in Figs. 3A and 3B the sealing structure 28 is positioned between the free end of the sidewall 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. Irrespective of the embodiment of the sealing structure 28 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.
    As can be seen from Fig. 3A the aluminum capsule body 12 is truncated. In the embodiment shown, the sidewall 16 of the aluminum capsule body 12 encloses an angle A with a line transverse to the central capsule body axis 12A of about 97.5°. The bottom 18 of the aluminum capsule body 12 has a largest inner diameter DB of about 23.3 mm. The bottom 18 of the aluminum capsule body 12 is also truncated, and in the shown embodiment has a bottom height BH of about 4.0 mm. The bottom 18 further has a generally flat central portion 18A opposite the cover 14, which 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.
    During supplying the water under pressure to the inner space 22, the pressure inside the capsule 2 will rise. The rise in pressure will cause the cover 14 to deform and be pressed against the lid piercing means 26 of the extraction plate. Once the pressure reaches a certain level, the tear strength of the cover 14 will be surpassed and the cover 14 will rupture against the lid piercing means 26, creating exit openings. The prepared coffee will drain from the capsule 2 through the exit openings and outlets 32 (see Fig. 1) of the extraction plate 8, and may be supplied to a container such as a cup (not shown).
    The system 1 is arranged such that prior to or at the start of brewing, the annular end surface 30 of the enclosing member 6 exerts a force Fl 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 FI is in the range of 30-150 N, preferably 40-150 N and more preferably 50-100N, when the fluid pressure PI in the enclosing member of the beverage preparation device outside the capsule is in the range of 0.1-4 bar, preferably 0.1-1 bar. During brewing, the 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. In the shown embodiment 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 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 FI as discussed above may be reached if the second part 6B is in the first position with a fluid pressure PI. The force F2 as discussed above may be reached if the second part 6B is moved towards the second position under the influence of the fluid pressure P2 in the enclosing member 6.
    As a result of the force applied the sealing 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 Fig. 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.
    Now exemplary embodiments of a sealing structure 28 at the outwardly extending flange 20 of the capsule 2 according to the invention will be described in more detail with reference to Figs. 4 to 6.
    Figs. 4 and 5 show a flange area of first example of capsule 2 according to the invention. A lower portion of the sidewall 16, the outwardly extending flange 20 and the sealing structure 28 at the flange 20 as well as a portion of the cover sheet 14 cover sheet attached to the flange 20 and hermetically closing off the capsule 2 are also shown. The capsule 2 is positioned in an enclosing member 6 with an annular end surface 30 of a compatible beverage preparation device. 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 28 is deformable for providing a fluid sealing contact with the annular end surface 30 of the enclosing member 6 (of which an end portion is shown) if the capsule 2 is positioned in the enclosing member 6 and the enclosing member 6 is closed by means of the closing member 8 and 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 28 includes a deformable sealing ring portion of the flange that projects axially from base portions 44, 45 of the flange 20 (i.e. portions to which the cover 14 adheres) on a side of the base portions 44, 45 opposite of the cover. The deformable sealing ring portion has: an inner wall portion 46 extending from and contiguous with an inner base portion 44 of the flange 20, an outer wall portion 47 extending from and contiguous with an outer base portion 45 of the flange, the outer wall portion being located outward of and spaced from the inner wall portion 46, and a bridge portion 48 interconnecting the inner wall portion 46 and the outer wall portion 47. The bridge portion 48 is located axially spaced from the base portions 44, 45 of the flange 20.
    The sealing structure 28 further includes a support member 49 between the inner and outer wall portions 46, 47. Because the support member 49 supports the bridge portion 48, the bridge portion 48 can be of a relatively easily deformable design that allows local deformation already at low clamping pressure to accommodate to the shape of the annular end surface 30 of the enclosing member 6 when clamped between the annular end surface 30 and the closing member 8. The support member 49 ensures that at higher clamping pressures enough counter pressure is exerted to reliably seal against a higher pressure drop over the seal.
    As is best seen in Fig. 5, even in case of an enclosing member 6 of which the annular end surface 30 is provided with radially extending open grooves 50 each located between raised areas 51, the grooves 50 and raised areas 51 alternating in circumferential sense of the annular end surface 30, the sealing structure 28 can accommodate to the succession of projections 51 and recesses 50 in circumferential sense of the annular end surface 30.
    Thus, the sealing structure 28 effectively seals against the recessed surface portions 50 of the annular end surface 30 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, and the pressure drop over the seal is low. During a final 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 high and the pressure drop over the seal is high, the support member causes the bridge portion 48 to be pressed against the annular end surface 30 with additional pressure, so that the seal between the bridge portion 48 to be pressed against the annular end surface 30 can resist the then applied higher pressure drop over the seal.
    In the present example, easy deformability of the bridge portion 48 and accordingly a high degree of conformability to the shape of the annular end surface 30 is achieved because the deformable sealing ring portion and the bridge portion 48 are positioned and have a widths such that the annular end portion 30 contacts the deformable sealing ring portion between the inner and outer wall portions 46, 47.
    The support member or support members may be of elastomeric and/or plastomeric material, preferably completely filling up space under the bridge portion 48 between the inner and outer wall portions 46, 47. In such a material adjacent portions may be deformed easily to highly different degrees, so that it easily accommodates to variations in circumferential sense of the degree of deformation resulting from successive raised and recessed portions 51, 50 of the annular end surface 30 pressing against the deformable sealing ring portion. Even if the material of the support member is relatively soft, e.g. 10-100 Durometer (ASTM D2240 type A scale) and more preferably 20-75 Durometer (ASTM D2240 type A scale), the solid support member 49 can generate substantial support pressure against the bridge 48, in particular against recessed areas 50, because the support member 49 (of which the volume is substantially constant irrespective of pressure exerted) completely fills up space under the bridge portion 48 between the inner and outer wall portions 46, 47, so local compression at one location requires expansion in another location. Thus, as in hydroforming, additional counter pressure is exerted in less deformed areas as a result of compression in more deformed areas. However, for allowing relatively large deformations, the support member 49 may be of a compressible foam material. In such a material, the above-described effect can be achieved as well after substantially all volume has been compressed out of the voids therein.
    For a high degree of conformability to the shape of the annular end surface 30 it is advantageous that, as in the present example, a top of the bridge portion 48 axially most remote from the base flange portions 44, 45 is flat. However, for a high degree of conformability to the shape of the annular end surface 30 it is advantageous if, in cross-sectional view as shown in Fig. 6, the top 152 of the bridge portion 148 has a center plane curved with a radius of curvature larger than two times a wall thickness of the top 152 of the bridge portion 148 (see Fig. 6).
    As also illustrated by the example shown in Fig. 6, the support member 149 may also be a spring member. Thus a high degree of resiliency can be achieved with a relatively stiff material, such as a metal. This allows the support member to be of for instance aluminum, so that it can be recycled after use and disposal together with the capsule body and with the cover, if the cover is of aluminum as well.
    For a good conformability to the shape of the annular end surface 30 it is further advantageous if at least a portion of the top 152 of the bridge portion 148 has a reduced wall thickness smaller than a wall thickness of the inner and outer wall portions 146, 147.
    If the capsule body has a coating to at least one side, leaving out the coating in at least the portion of the top 152 of the bridge portion 148 having a reduced wall thickness reduces the risk of the coating being damaged or becoming unstuck or can result from reducing the wall thickness by removing wall material.
    If the uncoated portion of the bridge portion 152 is on a side of the flange 120 opposite of the cover 114, a further improved sealing effect can be achieved if the uncoated portion of the bridge portion 152 has a textured surface, because clamping force is, at least initially, transferred via raised portions of the texture only, so that at the raised portions a higher contact pressure is exerted than would be exerted over a full smooth contact surface.
    As shown in Fig. 6, the top 152 of the bridge portion 148 is contacted first by the annular end portion 30. This is also advantageous for a particularly easy accommodation to the shape of the annular end surface 30.
    By providing that the top 152 of the bridge portion 148 (which extends circumferentially about the capsule axis) has a diameter of 29-33 mm, more preferably 30.0-31.4 mm and most preferably 30.3-31.0 mm, the top 152 of the bridge portion 148 is located centrally relative to the annular end surface 30 for being contacted by a central portion of the annular end surface 30 first when the sealing ring portion is clamped between the annular end surface and said closing member of widely used and commercially available beverage preparation devices such as the Citiz, Lattisima, U, Maestria, Pixie, Inissia and Essenza.
    In the foregoing specification, the invention has been described with reference to specific examples of embodiments of the invention. It will, however, be evident that various modifications and changes may be made therein without departing from the broader spirit and scope of the invention as set forth in the appended claims.
    权利要求:
    Claims (55)
    [1]
    A capsule containing a substance for the preparation of a drinkable brew by extraction and / or dissolution of the substance by supplying a fluid under pressure into the capsule, the capsule comprising: an aluminum capsule body with a central capsule body axis, the aluminum capsule body comprises a bottom, a side wall, an outwardly extending flange and a sealing structure on the flange; and a cover layer attached to the flange and hermetically sealing the capsule; wherein the sealing structure is deformable to provide a fluid-sealing contact with an annular end surface of an enclosure portion of a beverage preparation device when the capsule is placed in the enclosure portion and the enclosure portion by means of a closure portion of the beverage preparation device, such as an extraction plate of the beverage preparation device, is closed, with at least portions of the flange and the seal structure being clamped between the annular end surface and the closure member; wherein the annular end surface is optionally provided with a plurality of radially extending open grooves, characterized in that the sealing structure comprises a deformable sealing ring portion of the flange, the sealing ring portion protruding axially from base portions of the flange to which the lid is attached, to a side of the base portion opposite the lid, the deformable seal ring portion comprising: an inner wall portion which forms a continuous continuation of an inner base portion of the flange; an outer wall portion forming a continuous continuation of an outer base portion of the flange, the outer wall being outwardly from and spaced from the inner wall portion; a bridge portion interconnecting the inner wall portion and the outer wall portion, the bridge portion being axially spaced from the base portions of the flange; and at least one support member between the inner and outer wall portions.
    [2]
    A capsule according to claim 1, wherein the deformable seal ring portion and the bridge portion are positioned and have a width such that the annular end portion contacts the deformable seal ring portion between the inner and outer wall portions when the capsule is positioned in the enclosure portion and the enclosure portion by is closed by means of the closure portion of a compatible beverage preparation device, with at least portions of the sealing structure being clamped between the annular end surface and the closure portion.
    [3]
    A capsule according to claim 1 or 2, wherein the at least one support member is made of elastomer and / or plastomer material.
    [4]
    A capsule according to any one of the preceding claims, wherein the at least one support part is made of a compressible foam material.
    [5]
    A capsule according to any one of the preceding claims, wherein the support member is a spring element.
    [6]
    A capsule according to any one of the preceding claims, comprising a plurality of support members arranged in a circumferential sequence, wherein each support member has a length equal to or less than a pitch between successive grooves in the annular end surface of the enclosure member of a compatible beverage preparation device.
    [7]
    A capsule according to any one of the preceding claims, wherein, in cross-sectional view, an upper side of the bridge portion that is farthest axially from the base flange portions is flat or a center plane curved with a radius of curvature greater than twice a wall thickness of the upper side of the bridge section.
    [8]
    A capsule according to claim 7, wherein at least a portion of the upper side of the bridge portion has a reduced wall thickness smaller than a wall thickness of the inner and outer wall portions.
    [9]
    A capsule according to claim 8, further comprising a coating on at least one side of the capsule body, the coating being absent in at least the portion of the top of the bridge portion with a reduced wall thickness.
    [10]
    A capsule according to claim 9, wherein the uncoated portion of the bridge portion on one side of the flange is opposite the cover and has a textured surface.
    [11]
    A capsule according to claim 10, wherein the structured surface comprises ridges and valleys that extend circumferentially of the flange.
    [12]
    A capsule according to any one of the preceding claims, wherein the bridge portion is positioned to first be contacted by the annular end portion when the sealing ring portion is clamped between the annular end surface and the closure portion of a compatible beverage preparation device.
    [13]
    A capsule according to claim 12, wherein the top of the bridge portion forms a comb that extends circumferentially around the axis of the capsule, the comb having a diameter of 29 - 33 mm, preferably 30.0 - 31, 4 mm and more preferably 30.3 - 31.0 mm.
    [14]
    A capsule according to any one of the preceding claims, wherein 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.
    [15]
    A capsule according to any one of the preceding claims, wherein the outer diameter of the outwardly extending flange of the capsule is larger than the diameter of the bottom of the capsule.
    [16]
    A capsule according to claim 15, wherein the outer diameter of the outwardly extending flange is approximately 37.1 mm and the diameter of the bottom of the capsule is approximately 23.3 mm.
    [17]
    A capsule according to any one of the preceding claims, wherein the thickness of the aluminum capsule body is 20 to 200 microns, preferably 90 to 110 microns.
    [18]
    A capsule according to any one of the preceding claims, wherein the lid is made of aluminum with a thickness of 15 to 65 microns, 30 to 45 microns and more preferably 39 microns.
    [19]
    A capsule according to any one of the preceding claims, wherein the aluminum capsule body has a wall thickness and the lid has a wall thickness smaller than the wall thickness of the lid.
    [20]
    A capsule according to any one of the preceding claims, wherein the lid is adapted to tear open on a closure part of the beverage preparation device, such as an extraction plate of the beverage preparation device under the influence of liquid pressure in the capsule.
    [21]
    A capsule according to any one of the preceding claims, wherein the side wall of the aluminum capsule body has a free end opposite the bottom, the outwardly extending flange extending from the free end of the side wall in a direction at least substantially transversely of the central capsule body axis .
    [22]
    A capsule according to claim 19, wherein the outwardly extending flange comprises a curled outer edge outside the sealing portion.
    [23]
    A capsule according to claim 22, wherein an inner edge of the curled outer edge of the outwardly extending flange has a radius around the central capsule body axis of at least 32 mm.
    [24]
    A capsule according to claims 22 to 23, wherein the curled outer edge of the outwardly extending flange has a largest radial cross-sectional dimension of about 1.2 mm.
    [25]
    A capsule according to any of claims 21 to 24, wherein the inner diameter of the free end of the side wall of the aluminum capsule body is approximately 29.5 mm.
    [26]
    A capsule according to any of claims 9 to 14, wherein the distance between the free end of the side wall of the aluminum capsule body and an outer edge of the outwardly extending flange is approximately 3.8 mm.
    [27]
    A capsule according to any one of the preceding claims, wherein the aluminum capsule body has an height in the axial direction of approximately 28.4 mm.
    [28]
    A capsule according to any one of the preceding claims, wherein the aluminum capsule body is flattened, wherein preferably the side wall of the aluminum capsule body includes an angle with a line transverse to the central capsule body axis of about 97.5 °.
    [29]
    A capsule according to any one of the preceding claims, wherein the bottom of the aluminum capsule body has a largest inner diameter of approximately 23.3 mm.
    [30]
    A capsule according to claim 29, wherein the bottom of the aluminum capsule body is flattened, preferably with a bottom height of about 4.0 mm and wherein the bottom further has an entrance end opposite the lid with a diameter of about 8.3 mm .
    [31]
    A capsule according to any one of the preceding claims, wherein the sealing structure has an axial height of at least about 0.1 mm, more preferably at least 0.2 mm and most preferably at least 0.8 mm and at least at most 3 mm, more preferably at most 2 mm and most preferably at most 1.2 mm.
    [32]
    A capsule according to any one of the preceding claims, wherein the seal ring portion is deformable such that the seal ring portion effectively seals against the annular surface while during brewing, the maximum fluid pressure in the enclosure portion of the beverage preparation device is in the range of 6-20 bar, preferably between 12 and 18 bar.
    [33]
    A capsule according to any one of the preceding claims, wherein the sealing ring portion is deformable such that the sealing ring portion effectively seals against the annular surface as during brewing, the annular end surface exerts a force F2 on the sealing structure of the capsule to provide a sealing contact between to provide the flange and the annular end surface, wherein F2 is in the range of 500 - 1500 N, preferably in the range of 750 - 1250 N, when the fluid pressure P2 in the enclosure portion outside the capsule is in the range of 6 - 20 bar is, preferably between 12 and 18 bar.
    [34]
    A capsule according to any one of the preceding claims, wherein the seal ring portion is deformable such that the seal ring portion effectively seals against the annular surface if, in use, before or at the start of brewing, the annular end surface exerts a force F1 on the sealing structure of the capsule to provide a sealing contact between the flange and the annular end surface, the force F1 being in the range of 30 - 150 N, preferably 40 - 150 N, and more preferably 50 - 100 N, when the fluid pressure P1 is in the enclosure portion of the beverage preparation device outside the capsule is in the range of 0.1-4 bar, preferably 0.1-1 bar.
    [35]
    A capsule according to any one of the preceding claims, wherein the seal ring portion is deformable such that the seal ring portion effectively seals against the annular surface when the annular end surface pressed against the seal ring portion comprises a plurality of radially extending open grooves evenly spaced from each other distributed in circumference of the annular end surface.
    [36]
    A capsule according to any one of the preceding claims, wherein the seal ring portion is deformable such that the seal ring portion effectively seals against the annular surface if the largest width of each of the grooves is 0.9 - 1.1 mm, preferably 0.95 - 1.05 mm, more preferably 0.98 - 1.02 mm, wherein a maximum height of each of the grooves in an axial direction of the enclosure part of the beverage preparation device is 0.01 - 0.09 mm, preferably 0, 03 - 0.07 mm, more preferably 0.045 - 0.055 mm and most preferably 0.05 mm and wherein the number of grooves is 90 to 110, preferably 96, and optionally the radial width of the annular end surface at the location of the grooves are 0.05 - 0.9 mm, preferably 0.2 - 0.7 mm and more preferably 0.3 - 0.55 mm.
    [37]
    A capsule according to any one of the preceding claims, wherein the sealing ring portion and the remainder of the capsule body are made of the same plate material.
    [38]
    A system for preparing a drinkable brew from a capsule using a pressurized fluid in the capsule, comprising: a beverage preparation device comprising an enclosure portion for receiving the capsule, the enclosure portion comprising fluid injection means for supplying fluid under pressure in the capsule, the beverage preparation device further comprising a closure part, such as an extraction plate, for closing the enclosure part of the beverage preparation device, the enclosure part having an annular end with an annular end surface, the annular end surface optionally having a multiple number of radially extending open grooves; a capsule containing a substance for the preparation of a drinkable brew by supplying extraction and / or dissolution of the substance by means of a fluid under pressure in the capsule, the capsule comprising: an aluminum capsule body with a central capsule body axis, wherein the aluminum capsule body comprises a bottom, a side wall, an outwardly extending flange and a sealing structure on the flange; and a cover layer attached to the flange and hermetically sealing the capsule; wherein the sealing structure is deformable and in fluid-sealing contact with the annular end surface when the capsule is placed in the enclosing member and the enclosing member is closed by the closure member, with at least portions of the flange and the sealing structure clamped between the annular end surface and the closure member; characterized in that the seal structure comprises a deformable seal ring portion of the flange, wherein the seal ring portion extends axially from base portions of the flange to which the lid is attached on a side of the base portion opposite the enclosure member when the capsule is in the enclosure member, the deformable seal ring portion comprises: an inner wall portion which forms a continuous continuation of an inner base portion of the flange; an outer wall portion forming a continuous continuation of an outer base portion of the flange, the outer wall being outwardly from and spaced from the inner wall portion; a bridge portion interconnecting the inner wall portion and the outer wall portion, the bridge portion being axially spaced from the base portions of the flange; and at least one support member between the inner and outer wall portions.
    [39]
    A system according to claim 38, wherein the annular end portion contacts the deformable seal ring portion between the inner and outer wall portions when the capsule is placed in the enclosure member and the enclosure member is closed by the closure member, at least portions of the seal structure be clamped between the annular end surface and the closure member.
    [40]
    A system according to claim 38 or 39, wherein the capsule comprises a plurality of support members arranged in a circumferential sequence, each support member having a length equal to or less than a pitch between successive grooves in the annular end surface of the enclosure member.
    [41]
    A system according to any of claims 38-40, wherein the annular end surface first contacts the bridge portion when the seal ring portion is clamped between the annular end surface and the closure member.
    [42]
    A system according to any of claims 38 to 41, wherein the capsule is a capsule according to any of claims 2 to 31.
    [43]
    A system according to any of claims 38 to 42, wherein, in use, the maximum fluid pressure in the enclosure portion of the beverage preparation device is in the range of 6-20 bar, preferably between 12 and 18 bar.
    [44]
    A system according to any of claims 38 to 43, wherein the system is arranged such that, in use, during brewing, the annular end surface exerts a force F2 on the sealing structure of the capsule to provide a sealing contact between the flange and the annular end surface, where F2 is in the range of 500 - 1500 N, preferably in the range of 750 - 1250 N when the fluid pressure P2 in the enclosure portion outside the capsule is in the range of 6 - 20 bar, preferably between 12 and 18 bar.
    [45]
    A system according to any of claims 38-44, wherein the system is arranged such that, in use, before or at the start of brewing, the annular end surface exerts a force F1 on the sealing structure of the capsule to make a sealing contact to be provided between the flange and the annular end surface, where F1 is in the range of 30 - 150 N, preferably 40 - 150 N, more preferably 50 - 100 N, when the fluid pressure P1 in the enclosure portion of the beverage preparation device is outside the capsule is in the range of 0.1-4 bar, preferably 0.1-1 bar.
    [46]
    A system according to any of claims 38 to 45, wherein the plurality of radially extending open grooves are evenly spaced apart from each other in circumference of the annular end surface.
    [47]
    A system according to claim 46, wherein the largest width of each groove is 0.9 - 1.1 mm, preferably 0.95 - 1.05 mm, more preferably 0.98 - 1.02 mm, wherein maximum height of each groove in an axial direction of the enclosure part of the beverage preparation device is 0.01 - 0.09 mm, preferably 0.03 - 0.07 mm, more preferably 0.045 - 0.055 mm, and most preferably 0 05 mm, and wherein the number of grooves is 90 - 110, preferably 96, wherein the radial width of the annular end surface at the grooves is preferably 0.05 - 0.9 mm, more preferably 0.2 - 0.7 mm and even more preferably 0.3 - 0.55 mm.
    [48]
    A system according to any of claims 38 to 47, wherein during use when the closure part of the beverage preparation device closes the enclosure part of the beverage preparation device, at least a portion of the enclosure part of the beverage preparation device can move relative to the closure part of the beverage preparation device under the influence of from the pressure of the fluid in the enclosure portion of the beverage preparation device to the closure portion whereby the annular end surface applies the maximum clamping force to the flange of the capsule.
    [49]
    Use of a capsule according to any of claims 1 to 37 in a beverage preparation device comprising an enclosure part for receiving the capsule, wherein the enclosure part comprises fluid injection means which supplies fluid under pressure into the capsule, the beverage preparation device further comprising a closure part, such as an extraction plate which closes the enclosure portion of the beverage preparation device, the enclosure portion having an annular end with an annular end surface, the annular end surface optionally having a plurality of radially extending open grooves, the capsule being placed in the enclosure portion of the beverage preparation device , wherein the enclosure part is closed by means of the closure part of the beverage preparation device, and at least a portion of the sealing structure is clamped between the enclosure part and the closure part of the beverage preparation device or the sealing structure is brought into sealing contact with the annular end surface.
    [50]
    The use of claim 49, wherein the maximum fluid pressure in the enclosure portion of the beverage preparation device is in the range of 6-20 bar, preferably between 12 and 18 bar.
    [51]
    The use according to claim 49 or 50, wherein, in use, during brewing, the annular end surface of the enclosure member exerts a force F2 on the sealing structure of the capsule which provides a sealing contact between the outwardly extending flange of the capsule and the enclosure 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 enclosure portion of the beverage preparation device outside the capsule is in the range of 6 - 20 bar, at preferably between 12 and 18 bar while the sealing structure is in the sealing contact with the annular end surface.
    [52]
    The use according to any of claims 49 to 51, wherein, before or at the start of brewing, the annular end surface of the enclosure member exerts a force F1 on the sealing structure of the capsule which has a sealing contact between the outwardly extending flange of the capsule and provides the enclosure portion of the beverage preparation device, wherein F1 is in the range of 30 - 150 N, preferably 40 - 150 N, more preferably 50 - 100 N, when the fluid pressure P1 in the enclosure portion of the beverage preparation device is outside the capsule in the range is 0.1-4 bar, preferably 0.1-1 bar while the sealing structure is in the sealing contact with the annular end surface.
    [53]
    Use according to any of claims 49 to 52, wherein after the closure part of the beverage preparation device closes the enclosure part of the beverage preparation device, the enclosure part of the beverage preparation device moves relative to the closure part of the beverage preparation device under the influence of the pressure of the fluid in the enclosure part from the beverage preparation device to the closure part of the beverage preparation device, whereby the annular end surface applies the maximum clamping force to the flange of the capsule.
    [54]
    A method of manufacturing a capsule according to any of claims 8 to 10, starting from a semi-finished deep-drawn bowl-shaped element, the method comprising reducing a wall thickness of a portion of the flange to form the portion from the top of the bridge portion with a reduced wall thickness of less than a wall thickness of the inner and outer wall portions, the coating being removed from the portion of the flange whose wall thickness is to be reduced prior to or during the reduction of the wall thickness.
    [55]
    The method of claim 54, wherein the coating is removed from the portion of the flange whose wall thickness is to be reduced during a material removal step for removing wall material to reduce the wall thickness.
    类似技术:
    公开号 | 公开日 | 专利标题
    NL2016778B1|2016-12-30|A capsule, a system for preparing a potable beverage from such a capsule and use of such a capsule in a beverage preparation device
    NL2016777B1|2017-01-31|A capsule, a system for preparing a potable beverage from such a capsule and use of such a capsule in a beverage preparation device
    NL2016776B1|2017-01-31|A capsule, a system for preparing a potable beverage from such a capsule and use of such a capsule in a beverage preparation device
    EP3523217B1|2021-03-10|A capsule, a system for preparing a potable beverage from such a capsule and use of such a capsule in a beverage preparation device
    NL2016783B1|2016-12-30|A capsule, a system for preparing a potable beverage from such a capsule and use of such a capsule in a beverage preparation device
    WO2018067009A1|2018-04-12|A capsule, a system for preparing a potable beverage from such a capsule and use of such a capsule in a beverage preparation device
    同族专利:
    公开号 | 公开日
    KR20180008534A|2018-01-24|
    JP6962821B2|2021-11-05|
    EP3134332A1|2017-03-01|
    IL255674D0|2018-01-31|
    RU2017143835A3|2019-07-17|
    BR112017024468A2|2018-07-24|
    RU2017143835A|2019-06-17|
    CN107848700A|2018-03-27|
    RU2710763C2|2020-01-13|
    ES2740200T3|2020-02-05|
    NL2016778B1|2016-12-30|
    AU2016264686B2|2021-07-29|
    DK3134332T3|2019-08-26|
    US10940995B2|2021-03-09|
    AU2016264686A1|2017-12-14|
    US20180290825A1|2018-10-11|
    EP3134332B1|2019-06-19|
    IL255674A|2021-06-30|
    CA2985971A1|2016-11-24|
    PT3134332T|2019-09-30|
    JP2018515239A|2018-06-14|
    WO2016186491A1|2016-11-24|
    PL3134332T3|2019-11-29|
    CN107848700B|2020-03-31|
    MX2017014647A|2018-01-23|
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    申请号 | 申请日 | 专利标题
    NL2015050354|2015-05-15|
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