EP0554469A1 - Closed cartridge for making a beverage - Google Patents

Closed cartridge for making a beverage Download PDF

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Publication number
EP0554469A1
EP0554469A1 EP92101381A EP92101381A EP0554469A1 EP 0554469 A1 EP0554469 A1 EP 0554469A1 EP 92101381 A EP92101381 A EP 92101381A EP 92101381 A EP92101381 A EP 92101381A EP 0554469 A1 EP0554469 A1 EP 0554469A1
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EP
European Patent Office
Prior art keywords
cartridge
coffee
pressure
flow
weakening
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP92101381A
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German (de)
French (fr)
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EP0554469B1 (en
Inventor
Olivier Fond
Bernard Truchement
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.)
Societe des Produits Nestle SA
Nestle SA
Original Assignee
Societe des Produits Nestle SA
Nestle SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Societe des Produits Nestle SA, Nestle SA filed Critical Societe des Produits Nestle SA
Priority to AT92101381T priority Critical patent/ATE112227T1/en
Priority to DK92101381.9T priority patent/DK0554469T3/en
Priority to EP92101381A priority patent/EP0554469B1/en
Priority to DE69200472T priority patent/DE69200472T2/en
Priority to ES92101381T priority patent/ES2061284T3/en
Priority to JP5011863A priority patent/JPH05253071A/en
Publication of EP0554469A1 publication Critical patent/EP0554469A1/en
Application granted granted Critical
Publication of EP0554469B1 publication Critical patent/EP0554469B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
    • B65D85/70—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for
    • B65D85/804—Disposable containers or packages with contents which are mixed, infused or dissolved in situ, i.e. without having been previously removed from the package
    • B65D85/8043—Packages adapted to allow liquid to pass through the contents
    • B65D85/8061—Filters

Definitions

  • the invention relates to a method for extracting closed cartridges with filters containing a substance for the preparation of a drink, in particular roasted and ground coffee, said cartridge having substantially the shape of a truncated cone, with a lower face. provided with a weakening line.
  • the invention further relates to the cartridge for implementing this method.
  • capsules for the preparation of a drink is motivated by several reasons: hygiene, optimal conservation of coffee, ease of use, better control of coffee quality obtained and good reproducibility of the extraction conditions.
  • capsules available only the closed capsules, which open under the effect of the pressure of water injected, respond more fully to the arguments set out above.
  • Such a capsule the subject of patent CH 605,293, has a line of weakness determining a cover, which tears preferentially under the effect of pressure.
  • the opening is brutal. It follows a sudden and momentary decompression inside the capsule and upstream of the filter before the pressure rises by increasing the pressure drop during the passage of the extraction fluid through the coffee bed.
  • the object of the present invention is to develop a method and a cartridge which ensure product quality and regularity of flow while maintaining the simplicity of use and manufacture of the cartridge.
  • the invention relates to a method for extracting closed cartridges with filter in which one operates in three successive phases.
  • a mixture of air and water is first injected through the upper face of the cartridge at a pressure between 1 and 20 bar, the cartridge rising in pressure, this phase ensures a pre-wetting time for the coffee.
  • the membrane yields and lets the mixture flow.
  • the rupture pressure of the membrane is fixed by a weakening zone on the membrane.
  • the tear produced in the membrane has very precise dimensions in order to ensure strict control of the flow of the two-phase mixture at the time of rupture.
  • the extraction takes place in the third stage under a pressure of 1 to 20 bar, the pressure being essentially linked to the pressure drop across the coffee bed.
  • the extraction can be done using a commercial espresso machine suitable for extracting cartridges.
  • Pressurizing the cartridge before opening thus representing a pre-wetting time with injection of water and part of the air which remained in the pipes and heating elements, has a beneficial effect on the quality of the espresso coffee obtained.
  • the flow characteristics of the two-phase mixture at the time and after the rupture of the membrane are essential for the quality and regularity of preparation of the desired product.
  • the two-phase mixture will on the one hand relax and on the other flow.
  • the membrane of the cartridge has an opening whose dimensions do not allow control of the flow characteristics, the expansion of the gas part will create a significant and especially very rapid pressure drop downstream of the filter . This will cause very sudden flows upstream of the filter, which results in a partial or complete blockage of the filter by the ground coffee particles which have been entrained and which are blocked across the holes in the filter.
  • the opening has well-defined dimensions, it will be possible to strictly control the flow characteristics and consequently the movements of the coffee particles upstream of the filter.
  • the flow flows of the two-phase mixture are directly proportional to the free passage section. Restricted and controlled passage will result in acceptable speeds at the filter, which will prevent its partial blockage by coffee particles.
  • Partial or complete blockage of the filter must be avoided to ensure the quality and reproducibility of the product preparation conditions.
  • this closure can hinder the extraction of the coffee both in terms of flow by increasing the pressure drop through the filter and in terms of the exchange of coffee-fluid material. extraction since the drainage of the coffee bed will not be homogeneous.
  • the cartridge filter is partially blocked by the coffee particles, the pressure drop increasing through the filter, it becomes necessary to reduce it through the coffee bed in order to ensure a constant pressure upstream, thus guaranteeing with the machines commercial espresso equivalent extraction rate.
  • This is ensured by increasing the average size of the coffee particles. Consequently, the exchange of material between the coffee and the extraction fluid is reduced (reduced exchange surface, slower diffusion in the beans), which results in a lower concentration of the coffee extract and by a significant decrease in quality.
  • This phenomenon can be obtained by reducing the opening area of the capsule membrane, either by reducing the length and possibly the shape of the area weakened in thickness, or by adding a piece of sticky tape on the face. lower of said cartridge or of a part positioned in the cartridge holder under said cartridge, these elements limiting the movement of the cover.
  • the invention further relates to the cartridge which makes it possible to carry out this extraction process.
  • the cartridge consists of a sealed body having substantially the shape of a truncated cone, with a lower face provided with a weakening line which determines a reduced tear zone.
  • the cartridge is filled with a substance for the preparation of a drink.
  • This substance is preferably roasted and ground coffee, but can also be tea, soluble coffee, a mixture of ground coffee and soluble coffee or a chocolate or dehydrated product.
  • the cartridge has a diameter preferably between 2.5 and 6 cm and has a coffee bed thickness preferably between 10 and 25 mm.
  • the main body of the capsule can be made of aluminum with a thickness of 20 to 100 ⁇ m, of multilayer plastic with possibly an oxygen barrier layer such as EVOH or PVDC, of a multilayer film such as aluminum, plastic or plastic cardboard, optionally with an oxygen barrier layer such as EVOH or PVDC.
  • the underside of the capsule can be made of aluminum with a thickness of 40 to 120 ⁇ m.
  • the weakening zone obtained by punching, has a reduced length so that the opening of the lower face, produced by tearing said zone, in turn has reduced proportions in order to be able to laminate the flow of gas and water .
  • the weakening zone can be in the form, for example of an arc of a circle of 100 to 150 o with a diameter of the order of 6 mm or a straight line of 5 to 9 mm with a thickness residual from 10 to 20 ⁇ m in the case of an aluminum membrane with an original thickness of 100 ⁇ m.
  • this zone can represent an arc of a circle from 300 to 350 o with a diameter of 6 to 15 mm.
  • the sticky tape is positioned across the weakening zone or can cover it partially, but in the latter case, the strip is necessarily tangent at at least one point to the circle of said area.
  • this zone can represent a circular arc from 300 to 350 o with a diameter of 6 to 15 mm.
  • This part can be in the form of a round head of a screw or concave cup, the shape of which substantially matches the outside shape of the underside of the cartridge and placed 0.5 to 3 mm from said face.
  • Said cup is itself provided with a few holes for discharging the coffee, the holes also being able to contribute to the lamination of the flow.
  • Nespresso Capsules (registered trademark), 5 g, is carried out in a Turmix machine (registered trademark) C1100 with an Eaton pump working at a maximum pressure of 15 bar.
  • Normal membrane with cover according to patent CH 605293 Capsule according to the invention with control of the flow characteristics 44.3 g flow in 18 s Flow rate 42.5 g in 20 s Average particle size 387 ⁇ m 333 ⁇ m
  • Concentration extract in DM * 2.0% 2.35% Extraction efficiency 17.9% 20% Tasting preference 2/10 8/10 * MS dry matter
  • the cartridge according to the invention has a line of weakness in the form of an arc of a circle of 100 °.
  • the tasting preference is determined on a panel of ten people.
  • Normal capsule Capsule according to the invention Capsule according to the invention average particle size 387 ⁇ m 387 ⁇ m 333 ⁇ m Flow 51.5 g in 20 sec 60.5 g 43.1g Standard variation 15.3 g 6.0 g 5.5g
  • Fig. 1 represents in axial section a cartridge according to the invention
  • Fig. 2 is a bottom view of the cartridge according to FIG. 1.
  • the cartridge comprises a body (1) of 50 ⁇ m thickness having the shape of a truncated cone ending in an obtuse cone (3).
  • the edge (2) is formed by crimping the body on a membrane (5) detached from the filter (6).
  • the membrane has a weakening line (4) consisting of a stamped groove in the form of an arc of a circle of approximately 100 °.
  • the cartridge is extracted with the device of European patent No 242556 and contains roasted and ground coffee (9).

Abstract

The invention relates to a closed cartridge (1) with filter (6), containing a substance for preparing a beverage, particularly roasted ground coffee (9), the said cartridge substantially having the shape of a frustum of a cone with an inner face (5) provided with a weakening line (4) which determines a zone of reduced tearing. <IMAGE>

Description

L'invention concerne un procédé d'extraction de cartouches fermées avec filtres contenant une substance pour la préparation d'une boisson, en particulier du café torréfié et moulu, ladite cartouche ayant sensiblement la forme d'un tronc de cône, avec une face inférieure pourvue d'une ligne d'affaiblissement. L'invention concerne en outre la cartouche pour la mise en oeuvre de ce procédé.The invention relates to a method for extracting closed cartridges with filters containing a substance for the preparation of a drink, in particular roasted and ground coffee, said cartridge having substantially the shape of a truncated cone, with a lower face. provided with a weakening line. The invention further relates to the cartridge for implementing this method.

L'utilisation de capsules pour la préparation d'une boisson, surtout dans le domaine des cafés type espresso extraits sous pression, est motivée par plusieurs raisons: hygiène, conservation optimale du café, facilité d'usage, meilleure maîtrise de la qualité du café obtenu et bonne reproductibilité des conditions d'extraction. Parmi l'ensemble des capsules disponibles, seules les capsules fermées, s'ouvrant sous l'effet de la pression d'eau injectée, répondent plus complètement aux arguments énoncés ci-dessus.The use of capsules for the preparation of a drink, especially in the field of espresso type coffees extracted under pressure, is motivated by several reasons: hygiene, optimal conservation of coffee, ease of use, better control of coffee quality obtained and good reproducibility of the extraction conditions. Among all the capsules available, only the closed capsules, which open under the effect of the pressure of water injected, respond more fully to the arguments set out above.

Une telle capsule, faisant l'objet du brevet CH 605 293, présente une ligne d'affaiblissement déterminant un opercule, qui se déchire préférentiellement sous l'effet de la pression. L'ouverture est brutale. Il s'en suit une décompression brutale et momentanée à l'intérieur de la capsule et en amont du filtre avant que la pression ne remonte par augmentation de la perte de charge lors du passage du fluide d'extraction à travers le lit de café.Such a capsule, the subject of patent CH 605,293, has a line of weakness determining a cover, which tears preferentially under the effect of pressure. The opening is brutal. It follows a sudden and momentary decompression inside the capsule and upstream of the filter before the pressure rises by increasing the pressure drop during the passage of the extraction fluid through the coffee bed.

L'expérience a montré que cette ouverture brutale était néfaste à la régularité de l'écoulement car, lors de la décompression quasi instantanée, les particules de café ayant tendance à être aspirées vers l'extérieur de la capsule se retrouvaient coincées au travers des trous du filtre et les obstruaient.Experience has shown that this sudden opening is harmful to the regularity of the flow because, during the almost instantaneous decompression, the coffee particles tending to be sucked out of the capsule, they got stuck through the filter holes and blocked them.

Le but de la présente invention est de mettre au point un procédé et une cartouche qui assurent qualité du produit et régularité de l'écoulement tout en maintenant la simplicité d'usage et de fabrication de la cartouche.The object of the present invention is to develop a method and a cartridge which ensure product quality and regularity of flow while maintaining the simplicity of use and manufacture of the cartridge.

L'invention concerne un procédé d'extraction de cartouches fermées avec filtre dans lequel on opère en trois phases successives. On injecte, tout d'abord par la face supérieure de la cartouche un mélange d'air et d'eau à une pression comprise entre 1 et 20 bar, la cartouche montant en pression, cette phase assure un temps de prémouillage du café. Dans un deuxième temps, à une pression du mélange biphasique determinée, la membrane cède et laisse s'écouler le mélange. La pression de rupture de la membrane est fixée par une zone d'affaiblissement sur la membrane. La déchirure réalisée dans la membrane présente des dimensions bien précises afin d'assurer un contrôle strict de l'écoulement du mélange biphasique au moment de la rupture.The invention relates to a method for extracting closed cartridges with filter in which one operates in three successive phases. A mixture of air and water is first injected through the upper face of the cartridge at a pressure between 1 and 20 bar, the cartridge rising in pressure, this phase ensures a pre-wetting time for the coffee. In a second step, at a determined pressure of the two-phase mixture, the membrane yields and lets the mixture flow. The rupture pressure of the membrane is fixed by a weakening zone on the membrane. The tear produced in the membrane has very precise dimensions in order to ensure strict control of the flow of the two-phase mixture at the time of rupture.

L'extraction se déroule dans le troisième temps sous une pression de 1 à 20 bar, la pression étant essentiellement liée à la perte de charge à travers le lit de café. L'extraction peut se faire à partir d'une machine espresso du commerce adaptée pour l'extraction de cartouches.The extraction takes place in the third stage under a pressure of 1 to 20 bar, the pressure being essentially linked to the pressure drop across the coffee bed. The extraction can be done using a commercial espresso machine suitable for extracting cartridges.

Divers essais ont permis de mettre en évidence l'importance des deux premières phases du procédé d'extraction.Various tests have highlighted the importance of the first two phases of the extraction process.

La mise en pression de la cartouche avant son ouverture, représentant ainsi un temps de prémouillage avec injection d'eau et en partie d'air qui restait dans les tuyauteries et éléments de chauffage, a un effet bénéfique sur la qualité du café espresso obtenu. Plus la pression d'ouverture est élevée, de 1 à 10 bar, plus le produit est onctueux, a du corps, et une belle mousse crémeuse à sa surface.Pressurizing the cartridge before opening, thus representing a pre-wetting time with injection of water and part of the air which remained in the pipes and heating elements, has a beneficial effect on the quality of the espresso coffee obtained. The higher the opening pressure, from 1 to 10 bar, the more the product is creamy, has body, and a nice creamy foam on its surface.

Les caractéristiques d'écoulement du mélange biphasique au moment et après la rupture de la membrane sont essentielles pour la qualité et la régularité de préparation du produit désiré.The flow characteristics of the two-phase mixture at the time and after the rupture of the membrane are essential for the quality and regularity of preparation of the desired product.

Lors de la rupture de la membrane, le mélange biphasique va d'une part se détendre et d'autre part s'écouler.During the rupture of the membrane, the two-phase mixture will on the one hand relax and on the other flow.

Si, lors de la rupture, la membrane de la cartouche présente une ouverture dont les dimensions ne permettent pas un contrôle des caractéristiques d'écoulement, la détente de la partie gaz va créer une chute de pression importante et surtout très rapide en aval du filtre. Ceci va provoquer des écoulements très brutaux en amont du filtre, ce qui a pour conséquence une obturation partielle ou complète du filtre par les particules de café moulu ayant été entraînées et se trouvant bloquées en travers des trous du filtre.If, during rupture, the membrane of the cartridge has an opening whose dimensions do not allow control of the flow characteristics, the expansion of the gas part will create a significant and especially very rapid pressure drop downstream of the filter . This will cause very sudden flows upstream of the filter, which results in a partial or complete blockage of the filter by the ground coffee particles which have been entrained and which are blocked across the holes in the filter.

Au contraire, si l'ouverture a des dimensions bien définies, on pourra contrôler strictement les caractéristiques d'écoulement et par conséquent les mouvements des particules de café en amont du filtre. Les flux d'écoulements du mélange biphasique sont directement proportionnels à la section libre de passage. Un passage restreint et contrôlé entraînera des vitesses acceptables au niveau du filtre, ce qui empêchera son obturation partielle par les particules de café.On the contrary, if the opening has well-defined dimensions, it will be possible to strictly control the flow characteristics and consequently the movements of the coffee particles upstream of the filter. The flow flows of the two-phase mixture are directly proportional to the free passage section. Restricted and controlled passage will result in acceptable speeds at the filter, which will prevent its partial blockage by coffee particles.

L'obturation partielle ou complète du filtre doit être impérativement évitée afin d'assurer qualité et reproductibilité des conditions de préparation du produit.Partial or complete blockage of the filter must be avoided to ensure the quality and reproducibility of the product preparation conditions.

Ces deux points peuvent être parfaitement illustrés à l'aide des essais de production réalisés à une grande échelle.These two points can be perfectly illustrated by means of large-scale production tests.

En effet vis à vis de la qualité, cette obturation peut gêner l'extraction du café tant sur le plan de l'écoulement par augmentation de la perte de charge à travers le filtre que sur le plan de l'échange de matière café-fluide d'extraction puisque le drainage du lit de café ne sera pas homogène.
Lorsque le filtre des cartouches est partiellement obturé par les particules de café la perte de charge augmentant à travers le filtre, il devient nécessaire de la réduire à travers le lit de café afin d'assurer en amont une pression constante, garantissant ainsi avec les machines espresso du commerce un débit d'extraction équivalent. Ceci est assuré en augmentant la taille moyenne des particules de café. En conséquence, l'échange de matière entre le café et le fluide d'extraction est réduit (surface d'échange réduite, diffusion plus lente dans les grains), ce qui se traduit par une concentration plus faible de l'extrait de café et par une diminution significative de la qualité. Le café, étant moins concentré, apparaît moins riche.In fact with regard to quality, this closure can hinder the extraction of the coffee both in terms of flow by increasing the pressure drop through the filter and in terms of the exchange of coffee-fluid material. extraction since the drainage of the coffee bed will not be homogeneous.
When the cartridge filter is partially blocked by the coffee particles, the pressure drop increasing through the filter, it becomes necessary to reduce it through the coffee bed in order to ensure a constant pressure upstream, thus guaranteeing with the machines commercial espresso equivalent extraction rate. This is ensured by increasing the average size of the coffee particles. Consequently, the exchange of material between the coffee and the extraction fluid is reduced (reduced exchange surface, slower diffusion in the beans), which results in a lower concentration of the coffee extract and by a significant decrease in quality. The coffee, being less concentrated, appears less rich.

En ce qui concerne la reproductibilité, l'obturation étant aléatoire, les écarts d'écoulement et de qualité deviennent élevés entre les extractions des différents capsules. Il devient difficile de produire ces cartouches car on ne peut définir précisement quelle mouture doit être employée, et d'autre part les clients ne sont pas satisfaits car leur produit n'est pas régulier.As regards reproducibility, the obturation being random, the flow and quality differences become high between the extractions of the different capsules. It becomes difficult to produce these cartridges because one cannot precisely define which grind should be used, and on the other hand the customers are not satisfied because their product is not regular.

Le contrôle strict des caractéristiques de l'écoulement permet de régulariser considérablement les conditions d'extraction de ces cartouches et d'assurer des paramètres fiables lors de la fabrication industrielle des cartouches.The strict control of the flow characteristics makes it possible to considerably regularize the conditions of extraction of these cartridges and to ensure reliable parameters during the industrial manufacture of the cartridges.

Ce phénomène peut être obtenu en réduisant la zone d'ouverture de la membrane de la capsule, soit par réduction de la longueur et éventuellement de la forme de la zone affaiblie en épaisseur, soit par adjonction d'un morceau de ruban collant sur la face inférieure de ladite cartouche ou d'une pièce positionnée dans le porte-cartouche sous ladite cartouche, ces éléments limitant le déplacement de l'opercule.This phenomenon can be obtained by reducing the opening area of the capsule membrane, either by reducing the length and possibly the shape of the area weakened in thickness, or by adding a piece of sticky tape on the face. lower of said cartridge or of a part positioned in the cartridge holder under said cartridge, these elements limiting the movement of the cover.

L'invention concerne, en outre, la cartouche qui permet de réaliser ce procédé d'extraction. La cartouche se compose d'un corps étanche ayant sensiblement la forme d'un tronc de cône, avec une face inférieure pourvue d'une ligne d'affaiblissement qui détermine une zone de déchirure réduite.The invention further relates to the cartridge which makes it possible to carry out this extraction process. The cartridge consists of a sealed body having substantially the shape of a truncated cone, with a lower face provided with a weakening line which determines a reduced tear zone.

La cartouche est remplie d'une substance pour la préparation d'une boisson. Cette substance est de préférence du café torréfié et moulu, mais peut être aussi du thé, du café soluble, un mélange de café moulu et de café soluble ou un produit chocolaté ou deshydraté.The cartridge is filled with a substance for the preparation of a drink. This substance is preferably roasted and ground coffee, but can also be tea, soluble coffee, a mixture of ground coffee and soluble coffee or a chocolate or dehydrated product.

La cartouche a un diamètre compris de préférence entre 2.5 et 6 cm et a une épaisseur de lit de café comprise préférentiellement entre 10 et 25 mm.The cartridge has a diameter preferably between 2.5 and 6 cm and has a coffee bed thickness preferably between 10 and 25 mm.

Le corps principal de la capsule, de forme tronconique et de nature semi-rigide, peut être constitué d'aluminium d'une épaisseur de 20 à 100 µm, de plastique multicouches avec éventuellement une couche barrière à l'oxygène telle que l'EVOH ou le PVDC, d'un film multicouches tels que carton aluminium, plastique ou carton plastique avec éventuellement une couche barrière à l'oxygène telle que l'EVOH ou le PVDC.The main body of the capsule, of frustoconical shape and of semi-rigid nature, can be made of aluminum with a thickness of 20 to 100 μm, of multilayer plastic with possibly an oxygen barrier layer such as EVOH or PVDC, of a multilayer film such as aluminum, plastic or plastic cardboard, optionally with an oxygen barrier layer such as EVOH or PVDC.

La face inférieure de la capsule peut être constituée d'aluminium d'une épaisseur de 40 à 120 µm. La zone d'affaiblissement, obtenue par poinçonnage, présente une longueur réduite afin que l'ouverture de la face inférieure, réalisée par déchirure de ladite zone, présente à son tour des proportions réduites afin de pouvoir laminer le flux de gaz et d'eau.The underside of the capsule can be made of aluminum with a thickness of 40 to 120 µm. The weakening zone, obtained by punching, has a reduced length so that the opening of the lower face, produced by tearing said zone, in turn has reduced proportions in order to be able to laminate the flow of gas and water .

La zone d'affaiblissement peut se présenter sous la forme, par exemple d'un arc de cercle de 100 à 150 o d'un diamètre de l'ordre de 6 mm ou d'une droite de 5 à 9 mm d'une épaisseur résiduelle de 10 à 20 µm dans le cas d'une membrane en aluminium d'une épaisseur originelle de 100 µm.The weakening zone can be in the form, for example of an arc of a circle of 100 to 150 o with a diameter of the order of 6 mm or a straight line of 5 to 9 mm with a thickness residual from 10 to 20 µm in the case of an aluminum membrane with an original thickness of 100 µm.

Dans le cas où l'effet de lamination des flux de gaz et d'eau à l'ouverture de la cartouche est obtenu par ajout d'une bande collante en travers de la zone d'affaiblissement, cette zone peut représenter un arc de cercle de 300 à 350 o d'un diamètre de 6 à 15 mm. La bande collante est positionnée en travers de la zone d'affaiblissement ou peut la recouvrir tout en partie, mais dans ce dernier cas, la bande est obligatoirement tangente en au moins un point au cercle de ladite zone.In the case where the lamination effect of the gas and water flows at the opening of the cartridge is obtained by adding a sticky strip across the weakening zone, this zone can represent an arc of a circle from 300 to 350 o with a diameter of 6 to 15 mm. The sticky tape is positioned across the weakening zone or can cover it partially, but in the latter case, the strip is necessarily tangent at at least one point to the circle of said area.

Dans le cas où l'effet de lamination des flux de gaz et d'eau et à l'ouverture de la cartouche est obtenu à l'aide d'une pièce positionnée dans le porte-cartouche sous ladite cartouche, cette zone peut représenter un arc de cercle de 300 à 350 o d'un diamètre de 6 à 15 mm. Cette pièce peut se présenter sous la forme d'une tête ronde de vis ou de coupelle concave dont la forme épouse sensiblement la forme extérieure de la face inférieure de la cartouche et placée à 0.5 à 3 mm de ladite face. Ladite coupelle est elle-même pourvue de quelques trous pour l'évacuation du café, les trous pouvant également contribuer à la lamination du flux.In the case where the effect of lamination of the gas and water flows and at the opening of the cartridge is obtained using a part positioned in the cartridge holder under said cartridge, this zone can represent a circular arc from 300 to 350 o with a diameter of 6 to 15 mm. This part can be in the form of a round head of a screw or concave cup, the shape of which substantially matches the outside shape of the underside of the cartridge and placed 0.5 to 3 mm from said face. Said cup is itself provided with a few holes for discharging the coffee, the holes also being able to contribute to the lamination of the flow.

La suite de la description est faite en référence aux exemples comparatifs suivants.The rest of the description is made with reference to the following comparative examples.

On effectue une extraction de Capsules Nespresso (marque déposée) décaféiné, 5 g, dans une machine Turmix (marque déposée) C1100 avec une pompe Eaton travaillant à une pression maximum de 15 bar. Membrane normale avec opercule selon brevet CH 605293 Capsule selon l'invention avec contrôle des caractéristiques d'écoulement Ecoulement 44,3 g en 18 s Ecoulement 42,5 g en 20 s Taille moyenne des parti-cules 387 µm 333 µm Concentration extrait en M.S.* 2,0 % 2,35% Rendement d'extraction 17,9% 20% Préférence dégustation 2 / 10 8 / 10 * MS = matière sèche An extraction of Nespresso Capsules (registered trademark), 5 g, is carried out in a Turmix machine (registered trademark) C1100 with an Eaton pump working at a maximum pressure of 15 bar. Normal membrane with cover according to patent CH 605293 Capsule according to the invention with control of the flow characteristics 44.3 g flow in 18 s Flow rate 42.5 g in 20 s Average particle size 387 µm 333 µm Concentration extract in DM * 2.0% 2.35% Extraction efficiency 17.9% 20% Tasting preference 2/10 8/10 * MS = dry matter

La cartouche selon l'invention a une ligne d'affaiblissement sous forme d'arc de cercle de 100°.The cartridge according to the invention has a line of weakness in the form of an arc of a circle of 100 °.

La préférence de dégustation est déterminée sur un panel de dix personnes. Capsule normale Capsule selon l'invention Capsule selon l'invention taille moyenne des particules 387 µm 387 µm 333 µm Ecoulement 51,5 g en 20 sec 60,5 g 43,1 g Variation standard 15,3 g 6,0 g 5,5 g The tasting preference is determined on a panel of ten people. Normal capsule Capsule according to the invention Capsule according to the invention average particle size 387 µm 387 µm 333 µm Flow 51.5 g in 20 sec 60.5 g 43.1g Standard variation 15.3 g 6.0 g 5.5g

En analysant ces résultats, on confirme bien que le nouveau procédé permet à mouture équivalente de réduire la perte de charge globale par réduction de la perte de charge à travers le lit de café et que ce phénomène peut être compensé par réduction de la mouture ce qui assure une meilleure qualité du produit. Le point le plus important de la capsule selon l'invention reste néanmoins le grand avantage de sa reproductibilité qui se traduit par une réduction drastique de l'écart type de l'écoulement (variation standard).By analyzing these results, it is well confirmed that the new process allows equivalent grinding to reduce the overall pressure drop by reducing the pressure drop across the coffee bed and that this phenomenon can be compensated by reducing the grinding, which ensures better product quality. The most important point of the capsule according to the invention nevertheless remains the great advantage of its reproducibility which results in a drastic reduction in the standard deviation of the flow (standard variation).

La suite de la description est faite en référence aux dessins sur lesquels
Fig. 1
représente en coupe axiale une cartouche selon invention et
Fig. 2
est une vue de dessous de la cartouche selon la Fig. 1.The following description is made with reference to the drawings on which
Fig. 1
represents in axial section a cartridge according to the invention and
Fig. 2
is a bottom view of the cartridge according to FIG. 1.

La cartouche comprend un corps (1) de 50 µm d'épaisseur ayant la forme d'un tronc de cône se terminant par un cône obtus (3). La bordure (2) est formée par le sertissage du corps sur une membrane (5) décollée du filtre (6). La membrane comporte une ligne d'affaiblissement (4) constituée d'une rainure matricée ayant la forme d'un arc de cercle d'environ 100°. La cartouche est extraite avec le dispositif du brevet européen No 242556 et contient du café torréfié et moulu (9).The cartridge comprises a body (1) of 50 μm thickness having the shape of a truncated cone ending in an obtuse cone (3). The edge (2) is formed by crimping the body on a membrane (5) detached from the filter (6). The membrane has a weakening line (4) consisting of a stamped groove in the form of an arc of a circle of approximately 100 °. The cartridge is extracted with the device of European patent No 242556 and contains roasted and ground coffee (9).

Claims (5)

Procédé d'extraction de cartouches fermées avec filtres, contenant une substance pour la préparation d'une boisson, en particulier du café torréfié et moulu, ladite cartouche ayant sensiblement la forme d'un tronc de cône,avec une face inférieure pourvue d'une ligne d'affaiblissement caractérisé en ce qu'on introduit par la face supérieure de la cartouche un mélange d'air et d'eau à une pression comprise entre 1 et 20 bar de manière à opérer un prémouillage du café, à une pression déterminée dans la cartouche, celle-ci s'ouvre sur la ligne d'affaiblissement pour assurer un contrôle strict et régulier de l'écoulement du café et on extrait le café sous une pression de 1 à 20 bar.Method for extracting closed cartridges with filters, containing a substance for the preparation of a drink, in particular roasted and ground coffee, said cartridge having substantially the shape of a truncated cone, with a lower face provided with a weakening line characterized in that a mixture of air and water is introduced through the upper face of the cartridge at a pressure between 1 and 20 bar so as to pre-wet the coffee, at a pressure determined in the cartridge, it opens on the weakening line to ensure strict and regular control of the coffee flow and the coffee is extracted under a pressure of 1 to 20 bar. Procédé selon la revendication 1, caractérisé en ce qu'on réduit la zone d'ouverture de la cartouche pour assurer un écoulement régulier du café.Method according to claim 1, characterized in that the opening area of the cartridge is reduced to ensure a regular flow of coffee. Cartouche fermée avec filtre, contenant une substance pour la préparation d'une boisson, en particulier du café torréfié et moulu, ladite cartouche ayant sensiblement la forme d'un tronc de cône avec une face inférieure pourvue d'une ligne d'affaiblissement, caractérisé en ce que ladite ligne d'affaiblissement détermine une zone de déchirure réduite.Closed cartridge with filter, containing a substance for the preparation of a drink, in particular roasted and ground coffee, said cartridge having substantially the shape of a truncated cone with a lower face provided with a weakening line, characterized in that said line of weakness determines a reduced tear area. Cartouche selon la revendication 2, caractérisée en ce que la zone d'affaiblissement se présente sous la forme d'un arc de cercle de 100 à 150° et d'un diamètre de l'ordre de 6 mm.Cartridge according to claim 2, characterized in that the weakening zone is in the form of an arc of a circle of 100 to 150 ° and a diameter of the order of 6 mm. Cartouche selon la revendication 2, caractérisée en ce que la zone d'affaiblissement se présente sous la forme d'une droite de 5 à 9 mm.Cartridge according to claim 2, characterized in that the weakening zone is in the form of a straight line of 5 to 9 mm.
EP92101381A 1992-01-28 1992-01-28 Closed cartridge for making a beverage Expired - Lifetime EP0554469B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
AT92101381T ATE112227T1 (en) 1992-01-28 1992-01-28 CLOSED CAPSULE FOR PREPARING A DRINK.
DK92101381.9T DK0554469T3 (en) 1992-01-28 1992-01-28 Sealed cartridge for preparing a drink
EP92101381A EP0554469B1 (en) 1992-01-28 1992-01-28 Closed cartridge for making a beverage
DE69200472T DE69200472T2 (en) 1992-01-28 1992-01-28 Closed capsule for the preparation of a drink.
ES92101381T ES2061284T3 (en) 1992-01-28 1992-01-28 CLOSED CARTRIDGE FOR THE MAKING OF A DRINK.
JP5011863A JPH05253071A (en) 1992-01-28 1993-01-27 Extraction of drink ingredient enclosed in cartridge with filter and cartridge using in this extraction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP92101381A EP0554469B1 (en) 1992-01-28 1992-01-28 Closed cartridge for making a beverage

Publications (2)

Publication Number Publication Date
EP0554469A1 true EP0554469A1 (en) 1993-08-11
EP0554469B1 EP0554469B1 (en) 1994-09-28

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EP92101381A Expired - Lifetime EP0554469B1 (en) 1992-01-28 1992-01-28 Closed cartridge for making a beverage

Country Status (6)

Country Link
EP (1) EP0554469B1 (en)
JP (1) JPH05253071A (en)
AT (1) ATE112227T1 (en)
DE (1) DE69200472T2 (en)
DK (1) DK0554469T3 (en)
ES (1) ES2061284T3 (en)

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ATE112227T1 (en) 1994-10-15
DE69200472T2 (en) 1995-02-02
EP0554469B1 (en) 1994-09-28
ES2061284T3 (en) 1994-12-01
JPH05253071A (en) 1993-10-05
DE69200472D1 (en) 1994-11-03
DK0554469T3 (en) 1994-11-28

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