EP3251976B1 - Capsule de préparation d'une boisson - Google Patents

Capsule de préparation d'une boisson Download PDF

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Publication number
EP3251976B1
EP3251976B1 EP17172548.4A EP17172548A EP3251976B1 EP 3251976 B1 EP3251976 B1 EP 3251976B1 EP 17172548 A EP17172548 A EP 17172548A EP 3251976 B1 EP3251976 B1 EP 3251976B1
Authority
EP
European Patent Office
Prior art keywords
line
membrane
capsule
chamber
weakness
Prior art date
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Active
Application number
EP17172548.4A
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German (de)
English (en)
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EP3251976A3 (fr
EP3251976A2 (fr
Inventor
Roland Affolter
Max Schramm
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.)
Delica AG
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Delica AG
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Publication of EP3251976A2 publication Critical patent/EP3251976A2/fr
Publication of EP3251976A3 publication Critical patent/EP3251976A3/fr
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Classifications

    • 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
    • B65D85/8052—Details of the outlet

Definitions

  • the invention relates to a capsule for the production of a beverage according to claim 1.
  • Such capsules are particularly widespread for the preparation of coffee. But they are also used for tea or mixed drinks. Accordingly, when hot water is passed through the capsule, the substance contained in the closed chamber is either extracted, such as coffee powder, or dissolved by the hot water, such as milk powder.
  • the capsules are already opened on the inlet side when they are placed in a beverage preparation machine. Mandrels or knives penetrate a capsule wall or the capsule lid to introduce hot water. On the outlet side, the capsule is opened by the build-up of internal pressure and by the tearing open of a membrane along at least one weakened line.
  • a cartridge for the production of a drink which consists of a dense body made of aluminum sheet, which is closed by a membrane.
  • the membrane has a line of weakness that defines an opening.
  • the membrane is also made of aluminum and the weakening line is not closed in a preferred embodiment, but has the shape of a “C” or a horseshoe.
  • a capsule for the preparation of a drink has also become known, in which the lid of the capsule does not form the outlet side but the inlet side.
  • An outlet nozzle is arranged at the bottom of the capsule, whose bottom entrance is closed with a bursting membrane.
  • the bursting membrane has weakening lines starting from the center in a star shape in order to form an opening that is as uniform as possible when the internal pressure rises.
  • a cartridge for coffee and soluble products for the preparation of a beverage has become known.
  • the cartridge has a tubular container body, the ends of which are closed with a membrane.
  • Each membrane consists of a composite foil made of, for example, aluminum and plastic foil. A large number of small incisions are provided in the plastic film, which, under the action of pressure, form small openings in the membranes.
  • a disadvantage of the known capsules is that it is difficult or almost impossible to apply weakening lines in relatively thin aluminum foils. However, if the wall thicknesses are too great, a high internal pressure must be built up for the bursting open. It is therefore an object of the invention to avoid the disadvantages of the known and to create a capsule whose bursting membrane can be produced inexpensively, with the bursting behavior being able to be controlled within a large pressure range. According to the invention, this object is achieved with a capsule which has the features in claim 1 .
  • the capsule comprises a chamber containing at least one substance such as coffee or tea.
  • the preferably closed chamber has an outlet section which, in order to form an outlet opening, is formed by a membrane that ruptures under internal pressure in the chamber.
  • the membrane can directly form the lid or the base of the capsule or it can be arranged inside the capsule.
  • Chamber is in a capsule body arranged or it is formed by this.
  • This capsule body can be closed with a lid, which also consists of a foil made of metal or plastic.
  • the chamber is designed to be essentially liquid-tight and air-tight with respect to the outside atmosphere, so that the substance is protected from environmental influences.
  • the chamber is also designed to be aroma-tight against the outside atmosphere, so that oxidation by penetrating oxygen is prevented.
  • the capsule body can be made of plastic material or aluminum.
  • the membrane is provided with at least one weakened zone, in particular with at least one weakened line, the shape of which can vary.
  • the membrane can also be provided with a plurality of, for example, 2, 3, 4, 5 or more weakening lines, which can also be connected to one another.
  • the membrane consists of a composite foil comprising at least one metal foil and at least one plastic foil, with the weakened zone being arranged only in the plastic foil.
  • the weakened zone can have any geometric layout and can also consist of a combination of surfaces and lines, for example.
  • the metal foil for example made of aluminum, remains completely intact and the tearing behavior is determined exclusively by the weakened zone arranged in the plastic foil. Surprisingly, it has been shown that the weakened zone in the plastic film is completely sufficient and that, in the case of a weakened line, the tear in the metal foil follows exactly the weakened line in the plastic film. Thus, relatively thin metal foils can be used, which also with a tear reliably at lower internal pressures. A weakening line in the plastic foil is much easier to apply than in the metal foil.
  • a membrane that consists of an aluminum foil with a laminated PET (polyethylene terephthalate) layer has proven to be particularly advantageous. Such films are already used in the packaging industry and are available as standard goods. The production costs can be reduced considerably as a result. Other food grade plastics are also conceivable.
  • a sealing lacquer for sealing the membrane onto a support structure in particular onto a support shoulder of the capsule body, can be applied to the side of the aluminum layer facing away from the plastic film or PET layer.
  • the membrane can easily be installed in the capsule body by means of heat sealing.
  • the support structure below the area covered by the membrane can be configured as desired.
  • the aluminum layer can have a wall thickness of 6 to 30 ⁇ m, preferably 15 ⁇ m. Of course, depending on the application, other wall thicknesses are also conceivable.
  • the weakened zone is at least one weakened line, this can run in a straight line or curved or angled.
  • a wavy line or a meandering line would be conceivable.
  • the weakening line can run uninterrupted or an interrupted course would also be conceivable.
  • the uninterrupted course of the weakening line on the outlet section has the advantage that the outlet opening can be better controlled in such a way that the ruptured membrane does not impede the outflow of the beverage.
  • the outlet section is circular and the weakening line can form a straight line which traverses the outlet section. This creates an elongated tear in the membrane.
  • the membrane is freely stretched, comparable to an eardrum, and bulges outwards in a convex manner when the internal pressure builds up when viewed from the closed chamber.
  • the outlet section is circular and is supported on the side facing away from the chamber by a preferably circular support structure, with the weakening line forming a chord which intersects the outlet section between the outer circumference and the support structure.
  • the membrane is designed as an annular surface that is supported not only on the outer circumference but also in the center.
  • the weakening line intersects this annular surface as a chord.
  • the weakening line it would also be conceivable for the weakening line to intersect the annular surface radially outwards, starting from the center.
  • the outlet section is also circular, with the weakening line forming a tangent to the freely stretched area of the membrane. This is conceivable with or without a central support. In such a case, the line of weakness does not cause a weakening in the freely stretched Area of the membrane, but in the immediately adjacent area of attachment to the outer circumference.
  • the weakening line can surround the support structure.
  • the weakening line runs in the free-tensioned area between the support structure and the outer circumference of the outlet section, with the configuration of the weakening line being able to run polygonally, circularly or as any desired curve.
  • the membrane may be mounted on a preferably circular support shoulder which is formed by the capsule body and which is thus integral with it.
  • a preferably circular support shoulder which is formed by the capsule body and which is thus integral with it.
  • the membrane could be attached directly to a circumferential, outwardly directed collar of the capsule body. In certain cases it would even be conceivable that the membrane itself forms part of the capsule body.
  • the central support structure and the preferably circular support shoulder do not necessarily have to be part of the capsule body, but could also be arranged on a separate component.
  • the membrane is supported and fixed not only at its circular periphery but also at the center, controlling tear behavior at the line of weakness is particularly tricky.
  • the edges of the contact points also influence the tearing behavior of the circularly stretched bursting membrane, because the tearing stress would be greatest there due to the physical conditions without a weakening line.
  • a "punch through" of the central support structure however, the membrane is not desirable because it could impede the drainage of the beverage. This can be reliably prevented by the proposed arrangement of the weakening line.
  • the at least one weakening line which preferably forms a straight line, a chord or a tangent, does not necessarily have to be understood as the shortest connection between two points on the membrane. Rather, it means the general orientation or arrangement of the line of weakness in a generalizing sense.
  • a filter in particular a filter fleece, a perforated film or a perforated filter plate, can be arranged between the chamber and the membrane.
  • Such filter means are already known in the prior art and are not described in detail here.
  • an outlet connection can be arranged on the side of the membrane facing away from the chamber. This makes it possible for the drink to be fed directly from the capsule into a drinking vessel.
  • the weakening line can be designed as a zigzag line or as a meander line or as a wavy line. It is also conceivable that several weakened side lines running transversely to the at least one weakened line emanate from it. These can either cross the line of weakness or just abut against it from one side.
  • the proposed variants can be used when tearing open Openings are created in which the edges are reliably prevented from closing again.
  • the term clear width is to be understood as meaning the distance between the adjacent edges of an opening.
  • An opening that is larger than 1 mm 2 overall is particularly advantageous.
  • the invention also relates to a method for producing a membrane for a capsule according to the invention or for producing such a capsule.
  • the weakened zone in the plastic film is produced by removal using a laser, in particular by laser cutting. With the help of a laser, the width and depth of the weakened zone can be precisely determined without the metal layer being weakened as a result.
  • a particularly optimal process results when the composite film is formed as a tape that can be wound up and when a weakening line is first produced, preferably extending in the direction of the tape.
  • a weakening line preferably extending in the direction of the tape.
  • several weakening lines can also be produced next to one another in the strip direction.
  • the strip processed in this way forms a semi-finished product from which the membrane for the capsule is then punched out of the strip and inserted into the capsules. The punching takes place relative to the linear weakening line in such a way that it runs through the membrane at the desired point.
  • the covering of the unfilled capsules with the prepared tape and the subsequent punching out and insertion of the membrane can take place immediately one after the other in a continuous work process.
  • the weakening line it is also conceivable for the weakening line to be applied directly at the work station before the punching out and sealing, whether by laser or other aids.
  • the described production of the membrane from a coilable tape by subsequent punching out and inserting it into the capsule could also be particularly advantageous independently of the configuration of the capsule.
  • the semi-finished products can be produced and stored particularly efficiently and independently of the capsule production.
  • the coiled tapes can be used particularly optimally in an automated manufacturing process for the capsules.
  • FIG. 1 shows a capsule 1, as for example in the WO 2015/124558 A1 is described in more detail.
  • the rotationally symmetrical capsule body 2 has a capsule base 17 and a capsule side wall 18.
  • the capsule body 2 is closed with a cover 19 on a peripheral collar.
  • a peripheral supporting shoulder 12 is formed integrally with the capsule base 17, on which a membrane 6, which is only partially visible, is sealed.
  • an outlet connector 16 is also formed in one piece with the capsule base 17 in the center of which an elongate flow element 23 is held.
  • the area of the outlet connector facing the inside of the capsule forms a support structure 13 ( figure 2 ) which is firmly connected to the membrane 6 and supports it.
  • a cup insert 20 is arranged in the capsule body and snapped in at the bottom with a snap-in connection 24 .
  • the cup insert 20 is supported on the side wall 18 of the capsule by a peripheral collar 21 towards the side of the lid 19 .
  • Coffee powder is included in the cup insert, for example.
  • the bottom of the cup insert 20 is designed as a hole filter 14 that holds back the coffee grounds during the extraction process.
  • stiffening ribs 22 are arranged, of which figure 1 one is cut in full length.
  • the cup insert 20 could also be replaced by another insert replaced or it could be omitted altogether when the substance is a soluble product such as powdered milk.
  • the inside of the capsule body forms a closed chamber 3, the outlet section of which is formed by the membrane 6 already mentioned.
  • FIG. 2 Further details of this arrangement result from figure 2 .
  • the cup insert 20 has been removed here and the membrane 6 sealed onto the peripheral support shoulder 12 is only partially shown, so that the support structure 13 underneath is still partially visible.
  • This inner part of the outlet connector 16 has several outlet slots 15 running in the longitudinal direction of the outlet connector.
  • the central section of the support structure 13 is also provided with slots 15 of this type.
  • the membrane 6 is provided with a linear weakening line 7 which eccentrically crosses the circular outlet section 4 formed by the membrane.
  • the lid 19 is pierced by means of a cannula, after which hot water is pumped into the closed chamber. Under the internal pressure that builds up, the membrane 6 tears along the weakened line 7, as a result of which an outlet opening 5 is formed. The liquid flows through these into the area under the membrane 6 and through the slits 15 into the outlet connection 16.
  • FIG 3 shows schematically the structure of a composite film 8 from which the membrane 6 is made.
  • a plastic film 10, preferably made of PET, is laminated onto a metal foil 9, preferably made of aluminum.
  • a sealing wax 11 can be applied so that the composite film can be fixed in a simple manner.
  • the weakened zone designed as a weakened line 7 is only arranged in the plastic film 10 .
  • the weakening line is lasered out of the plastic layer.
  • the width and depth of the weakening line 7 can thus be optimally determined.
  • the weakening line does not necessarily have to penetrate the entire plastic film.
  • the metal foil made of aluminum can have a wall thickness of 15 ⁇ , for example. In relation to the total wall thickness of the membrane, the weakened zone could also be made much wider than shown here.
  • the Figures 4 to 7 show schematically on the left-hand side a composite film 8 designed as a rollable strip, for example as described above.
  • the film strip has a width b.
  • An endless weakening line 7 is arranged at a distance x from an outer edge of the strip and extends linearly in the longitudinal direction of the film strip.
  • the subsequently punched membrane 6 is shown schematically and also the basis of figure 2 described peripheral support shoulder 12 and the central support structure 13.
  • the weakening line 7 runs as a chord between the surrounding support shoulder 12 and the central support structure 13.
  • an opening 5 is formed in the form of a longitudinal slit, which is delimited on both sides by the surrounding support shoulder. This is a preferred embodiment because the opening behavior can be easily controlled.
  • the weakening line runs through the center of the surrounding support shoulder 12 and the central support structure 13. Openings 5a, 5b form in the freely stretched area of the membrane 6. However, the membrane remains firmly connected to the support structure 13.
  • the weakening line 7 forms the weakening line 7 similar to the embodiment according to FIG figure 4 also a tendon, which cuts the membrane in the freely stretched area.
  • the chord is far outside in the area of the outer diameter, which means that the points at which the weakening line 7 intersects with the supporting shoulder 12 are close together, as can be seen.
  • the tearing behavior of the membrane thus changes and the tearing stress causes a tear which expands towards the central support structure 13 .
  • the weakening line 7 only runs straight as a tangent to the freely stretched area of the membrane 6, i.e. practically only over the surrounding supporting shoulder 12.
  • the tearing behavior can be controlled least well with this course, because the crack formation starting from the tangential point moves inward in an uncontrolled manner spreads.
  • the lines of weakness shown are not straight lines in the geometric sense. However, the general direction or an imaginary center line is straight.
  • the weakening line 7 is a wavy line which intersects the freely stretched annular surface of the membrane 6 between the supporting shoulder 12 and the central supporting structure 13 .
  • the wavy line is arranged and configured in such a way that it does not touch or overlap the central support structure 13 .
  • the weakening line 7 is a zigzag line which also runs straight overall. A sufficient distance from the central support structure 13 is also maintained here.
  • the line of weakness 7 has a plurality of side lines of weakness 26 which run transversely and which cross the line of weakness or abut from one side. Also, the side lines of weakness do not touch or overlap the central support structure 13 .
  • the line of weakness 7 runs around the central support structure 13 in the shape of a square.
  • the sides of the square are fairly close to the outer perimeter of the support structure.
  • the line of weakness could also run around the support structure in a star shape, polygonal shape, circular shape or in any desired configuration. It would also be conceivable for one or more weakening lines, which extend up to the supporting shoulder 12, to be attached to a weakening line surrounding the support structure.
  • the central support structure could also be omitted in certain cases.
  • the general direction of the at least one weakening line is not straight but curved. With regard to production from an endless strip of film, however, a generally straight alignment is expedient.

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

Claims (17)

  1. Capsule (1) pour la préparation d'une boisson, comprenant une chambre (3) contenant au moins une substance, la chambre présentant une section de sortie (4) qui est formée par une membrane (6) se déchirant sous la pression interne dans la chambre pour former une ouverture de sortie (5), et dans lequel la membrane est pourvue d'au moins une ligne d'affaiblissement (7) pour définir l'ouverture de sortie, dans lequel la membrane (6) est une feuille composite (8) comprenant au moins une feuille métallique (9) et au moins une feuille de plastique (10) et dans lequel la ligne d'affaiblissement (7) est disposée uniquement dans la feuille de plastique (10), la section de sortie (4) étant de forme circulaire, caractérisé en ce que la ligne d'affaiblissement (7) forme une ligne ininterrompue qui traverse la section de sortie (4), ou la ligne d'affaiblissement (7) entoure une structure de support (13) disposée sur le côté opposé à la chambre (3) dans une zone librement tendue entre la structure de support (13) et une périphérie extérieure de la section de sortie (4).
  2. Capsule selon la revendication 1, dans laquelle la membrane (6) est constituée d'une feuille d'aluminium sur laquelle est contrecollée une couche de PET.
  3. Capsule selon la revendication 1 ou 2, dans laquelle une laque de scellement (11) est appliquée sur la face de la feuille d'aluminium opposée à la feuille de plastique pour sceller la membrane sur une structure de support, en particulier sur un épaulement de support (12) du corps de capsule (2).
  4. Capsule selon la revendication 2 ou 3, dans laquelle la feuille d'aluminium présente une épaisseur de paroi de 6 à 30µm, de préférence de 15µm.
  5. Capsule selon l'une quelconque des revendications 1 à 4, dans laquelle le film plastique (10) est orienté vers la chambre fermée (3).
  6. Capsule selon l'une quelconque des revendications 1 à 5, dans laquelle la ligne d'affaiblissement (7) forme une droite qui traverse la partie de sortie.
  7. Capsule selon l'une quelconque des revendications 1 à 5, dans laquelle la partie de sortie (4) est supportée, du côté opposé à la chambre fermée, par une structure de support (13) de préférence circulaire, la ligne d'affaiblissement formant une corde qui coupe la partie de sortie entre la périphérie extérieure et la structure de support.
  8. Capsule selon l'une quelconque des revendications 1 à 5, dans laquelle la ligne d'affaiblissement (7) entoure la structure de support (13) sous la forme d'un polygone, d'un cercle ou d'une courbe quelconque.
  9. Capsule selon l'une quelconque des revendications 1 à 8, dans laquelle la chambre (3) est disposée dans, ou formée par, un corps de capsule (2) qui est fermé par un couvercle (19) .
  10. Capsule selon l'une quelconque des revendications 1 à 9, dans laquelle la membrane (6) est fixée sur un épaulement de support (12), de préférence circulaire, formé par le corps de capsule (2).
  11. Capsule selon l'une des revendications 1 à 10, dans laquelle un filtre (14), en particulier un non-tissé filtrant, une feuille perforée ou une plaque filtrante perforée, est disposé entre la chambre (3) et la membrane (6).
  12. Capsule selon l'une quelconque des revendications 1 à 11, dans laquelle une tubulure de sortie (16) est disposée sur le côté de la membrane (6) qui est opposé à la chambre (3).
  13. Capsule selon l'une quelconque des revendications 1 à 12, dans laquelle la ligne d'affaiblissement est une ligne en zigzag ou une ligne en méandre ou une ligne ondulée.
  14. Capsule selon l'une quelconque des revendications 1 à 13, dans laquelle plusieurs lignes latérales d'affaiblissement s'étendent transversalement à partir de la ligne d'affaiblissement.
  15. Capsule selon l'une quelconque des revendications 1 à 14, dans laquelle la membrane se rompt sous une pression interne dans la chambre comprise entre 0,5 et 20 bars dans la zone de la ligne d'affaiblissement, de telle sorte que la membrane se déforme plastiquement sans propriété de reprise de forme et qu'il se forme une ouverture d'une largeur intérieure supérieure à 1 mm.
  16. Procédé de fabrication d'une capsule (1) selon l'une des revendications 1 à 15, caractérisé en ce que la ligne d'affaiblissement (7) est créée dans le film plastique (10) par ablation au moyen d'un laser.
  17. Procédé selon la revendication 16, dans lequel la feuille composite (8) est réalisée sous la forme d'une bande enroulable (25) et dans lequel une ligne d'affaiblissement (7) est d'abord produite, de préférence en s'étendant dans la direction de la bande, et la membrane est ensuite découpée dans la bande et insérée dans la capsule.
EP17172548.4A 2016-06-03 2017-05-23 Capsule de préparation d'une boisson Active EP3251976B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH00715/16A CH712563A1 (de) 2016-06-03 2016-06-03 Kapsel für die Herstellung eines Getränks.

Publications (3)

Publication Number Publication Date
EP3251976A2 EP3251976A2 (fr) 2017-12-06
EP3251976A3 EP3251976A3 (fr) 2018-03-07
EP3251976B1 true EP3251976B1 (fr) 2022-04-27

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP17172548.4A Active EP3251976B1 (fr) 2016-06-03 2017-05-23 Capsule de préparation d'une boisson

Country Status (6)

Country Link
EP (1) EP3251976B1 (fr)
CH (1) CH712563A1 (fr)
DK (1) DK3251976T3 (fr)
ES (1) ES2921490T3 (fr)
PL (1) PL3251976T3 (fr)
PT (1) PT3251976T (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3686127A1 (fr) * 2019-01-24 2020-07-29 Delica AG Capsule destinée à la préparation d'une boisson

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH605293A5 (fr) 1976-12-17 1978-09-29 Nestle Sa
EP0521510B1 (fr) * 1991-07-05 1996-12-27 Societe Des Produits Nestle S.A. Cartouche rigide pour café et son procédé de fabrication
EP0806373B1 (fr) * 1996-05-10 2001-09-05 Societe Des Produits Nestle S.A. Cartouche fermée avec zones de moindre épaisseur
ITMI20111847A1 (it) * 2011-10-10 2013-04-11 Goglio Spa Cartuccia per caffe' e prodotti solubili in genere
EP2794427B2 (fr) * 2011-12-21 2021-08-18 Delica AG Capsule, corps de capsule, procédé et système de préparation d'une boisson
ES2398278B2 (es) * 2012-08-28 2013-12-18 Unión Tostadora, S.A. Cápsula para máquina de preparación de bebida
CH709273A2 (de) 2014-02-21 2015-08-28 Delica Ag Kapsel umfassend einen vorzugsweise rotationssymmetrisch ausgebildeten Kapselkörper.
GB201420263D0 (en) * 2014-11-14 2014-12-31 Kraft Foods R & D Inc A method of forming a cup-shaped body of a beverage capusle, a beverage capsule and a beverage preparation system

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Publication number Publication date
ES2921490T3 (es) 2022-08-26
PT3251976T (pt) 2022-06-28
EP3251976A3 (fr) 2018-03-07
PL3251976T3 (pl) 2022-11-21
DK3251976T3 (da) 2022-06-20
EP3251976A2 (fr) 2017-12-06
CH712563A1 (de) 2017-12-15

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