EP1792850A1 - Single portion cartridge - Google Patents

Single portion cartridge Download PDF

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Publication number
EP1792850A1
EP1792850A1 EP06020762A EP06020762A EP1792850A1 EP 1792850 A1 EP1792850 A1 EP 1792850A1 EP 06020762 A EP06020762 A EP 06020762A EP 06020762 A EP06020762 A EP 06020762A EP 1792850 A1 EP1792850 A1 EP 1792850A1
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EP
European Patent Office
Prior art keywords
capsule
portion capsule
capsule according
support structure
coffee
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
EP06020762A
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German (de)
French (fr)
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EP1792850B1 (en
Inventor
Rüdiger Ternité
Klaus-Dieter Mund
Hartwig Meyer-Ruhstrat
Ingo Lantz
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Tchibo GmbH
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Tchibo GmbH
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Publication date
Application filed by Tchibo GmbH filed Critical Tchibo GmbH
Priority to PL06020762T priority Critical patent/PL1792850T3/en
Publication of EP1792850A1 publication Critical patent/EP1792850A1/en
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Publication of EP1792850B1 publication Critical patent/EP1792850B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
    • B65D85/70—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for
    • B65D85/804—Disposable containers or packages with contents which are mixed, infused or dissolved in situ, i.e. without having been previously removed from the package
    • B65D85/8043—Packages adapted to allow liquid to pass through the contents

Definitions

  • the invention relates to a portion capsule which is particularly suitable for brewing individual coffee portions (one cup or two cups of a coffee beverage) in a coffee machine intended for the use of portion capsules.
  • a portion capsule is described with a capsule lid and a capsule bottom, which is closed on all sides in the delivery state and contains a particulate, extractable by water coffee substance.
  • a distributor device is arranged between the capsule lid and the coffee substance and a collecting device is arranged between the coffee substance and the capsule bottom.
  • the distribution device and the collection device each have a number of openings and embossments for the formation of liquid channels on.
  • This portion capsule is used in a special coffee machine, wherein the capsule lid and the capsule bottom are perforated when inserting the portion capsule into the machine or during the brewing process.
  • hot water reaches the distribution device through an opening in the capsule lid and is distributed substantially uniformly therefrom, so that the coffee substance in the portion capsule can be extracted substantially uniformly.
  • the finished beverage is passed from the collector to an opening in the capsule bottom. In this case, it first flows through the openings of the collecting device, which have a screen or filter function, and can then flow through a cavity between the collecting device and the capsule bottom, which is formed between the embossments of the collecting device, to the opening in the capsule bottom. There, the beverage exits from the portion capsule and can be collected from a vessel (eg a cup).
  • a vessel eg a cup
  • the collecting device of the previously known portion capsule has, in addition to the functions mentioned as a guide, as a sieve or filter and as a spacer, the additional function of providing a crema formation (foam) in the coffee beverage, if desired. This is especially the case with cafe Crema and Espresso, while e.g. in Germany normal filter coffee just should not get a crema. In the case of the previously known portion capsule, however, the crema formation in connection with the other functions of the collecting device can not be controlled satisfactorily.
  • the portion capsule according to the invention has a capsule lid and a capsule bottom and is closed on all sides in the delivery state. It contains a particulate water-extractable beverage substance, preferably ground coffee. Between the beverage substance and the capsule bottom a sieve device is arranged, which fulfills a sieve or filter function.
  • the screening device is held in the central region of the capsule bottom by means of a ring-like structure at a distance from the capsule bottom.
  • a ring-like structure is defined in the space between the sieve device and capsule bottom, an outer region (which is outside the ring-like structure) and an inner region (which lies within the ring-like structure).
  • the term "ring-like structure" is not to be understood as limited to a ring appearing circular in plan view, but more generally; so the ring-like structure in plan view, e.g. square or irregular shaped and must not necessarily be closed in the circumferential direction.
  • the outer area and the inner area of the ring-like structure are connected via passage openings.
  • the height of the ring-like structure is less than 20% of the height of the portion capsule, e.g. less than 10%.
  • the ring-like structure of the portion capsule according to the invention is involved in the formation of a gap between the sieve device and the capsule bottom. This space takes during the brewing process by the sieve means penetrated extracted beverage, which created by a created in the central region of the capsule floor opening Can leave the portion capsule. It must flow through the through holes. Crema formation can be controlled via the design of the passage openings. This is completely independent of the design of the screening device. Therefore, in the portion capsule according to the invention, the devices for the screen or filter function and for the crema formation are decoupled, which increases the design options.
  • the beverage substance comprises ground coffee.
  • the passage openings can be relatively small and designed to form a crema. Because when coffee flows through small openings, especially at higher pressure (e.g., 7 bar to 13 bar or 9 bar to 18 bar, as is customary for Cafe Crema or espresso), turbulence causes entrapment of air, forming the crema.
  • the screening device has a support structure.
  • the ring-like structure is formed integrally with the support structure, for example as a molded part.
  • the support structure may comprise one or more spacers which bear against the capsule bottom outside the central region of the capsule bottom so that these spacers, together with the annular structure in the central region, provide the desired gap between the sieve device and the capsule bottom.
  • the gap does not necessarily extend over the entire surface of the capsule bottom.
  • the support structure may be provided with at least one recess which is covered with a textile fabric, such as a fabric or a nonwoven. More about such embodiments can be found in the German Patent Application 10 2005 016 297 , In this case, the textile fabric can be connected, for example, by gluing, welding, embossing or embedding with the support structure.
  • the screening device may also comprise a perforated screen, which is preferably formed integrally with the support structure, e.g. as a molded part. Since with today's injection molding techniques even such fine holes can be formed as e.g. are required for a coffee filter, such a one-piece construction can have price advantages. It is also conceivable, however, to occupy recesses in a support structure with conventional filter paper.
  • the support structure in its central region on a protuberance, which is directed away from the ring-like structure and adapted for receiving a mandrel on a coffee capsule adapted to the capper.
  • Portion capsules with such a protuberance are intended for coffee machines in which the portion capsule is perforated on the capsule bottom by means of a mandrel.
  • the mandrel should penetrate only the capsule bottom, but not damage the screening device, which is why the screening device springs back into the inside of the portion capsule, where the mandrel penetrates, ie in the region of the protuberance.
  • the support structure has a reinforcing edge on its periphery, e.g. an edge that protrudes from a disc-like structure.
  • a reinforcing edge on its periphery, e.g. an edge that protrudes from a disc-like structure.
  • the portion capsule according to the invention may have a distributor device which is arranged between the capsule lid and the beverage substance.
  • the distribution device may e.g. be formed as (flat) plate with openings or as a curved structure with openings, wherein the apertures, e.g. can be configured as radially extending slots and / or as holes.
  • the manifold has no channel-like embossments.
  • the distribution device causes water introduced on the capsule lid to extract the beverage substantially evenly distributed in the beverage substance.
  • the distribution device also has a protuberance in its central region, which is here directed away from the capsule lid and adapted to receive a mandrel on a coffee machine adapted to the portion capsule, via which the water is introduced into the portion capsule. Similar to the previously described protuberance of the screening device, the protuberance of the distributor device is not damaged when the mandrel penetrates into the portion capsule.
  • the capsule bottom may have a desired weak point in its central area.
  • Capsule bottom is generally understood to mean the side of the portion capsule from which the beverage emerges from the portion capsule, that is, regardless of whether the capsule bottom is located at the top or bottom of a portion capsule inserted into a coffee machine.
  • the weak point of weakness facilitates the piercing of the capsule bottom in the coffee machine.
  • the desired weak point has a piece of film which is weaker than the capsule bottom in the vicinity of the film piece.
  • the beverage substance may also comprise substances other than ground coffee, e.g. Tea, chocolate (again, the possibilities of the invention are useful for controlling crema formation), instant soup, milk powder, liquid milk (as an additive), etc., or mixtures of such substances, including ground coffee.
  • substances other than ground coffee e.g. Tea, chocolate (again, the possibilities of the invention are useful for controlling crema formation), instant soup, milk powder, liquid milk (as an additive), etc., or mixtures of such substances, including ground coffee.
  • the portion capsule 1 shows an embodiment of a portion capsule 1 is shown in longitudinal section.
  • the portion capsule 1 has a capsule lid 2, a capsule bottom 3 and a peripheral wall 4, which is formed integrally with the capsule bottom 3 in the embodiment. From the upper end of the wall 4 is an annular flange 5, on which in the embodiment of the capsule lid 2 is sealed. The portion capsule 1 is therefore closed on all sides in the delivery state.
  • a sieve 6 and under the capsule cover 2 a manifold 8.
  • the space between the sieve 6 and the manifold 8 is filled with a coffee powder 9, in the embodiment of Figure 1 with a coffee powder as it is suitable for brewing cafe Crema.
  • top and bottom refer to the illustration in the figures, regardless of the orientation in which a portion capsule is inserted when used in a coffee machine. In principle, the bottom can also be at the top and the lid at the bottom. In the terminology chosen here, the brewing water is introduced into the capsule cap on the capsule lid, while the finished beverage emerges from the capsule bottom. How this can be done in detail is explained below.
  • the capsule bottom 3 and the wall 4 of the portion capsule 1 are made of a plastic, e.g. as a molded part or as a deep-drawn part. It can also be used multilayer materials, as known from the technology of food packaging.
  • the capsule lid 2 has in the exemplary embodiment a composite foil with aluminum and plastics.
  • the screening device 6 is shown again in longitudinal section.
  • the screening device 6 includes a support structure 10 having a raised reinforcing edge 12 projecting outwardly at its upper end in a flange-like manner.
  • a conical protuberance 14 is provided which faces upwards.
  • a ring-like structure 16 At the bottom there is a ring-like structure 16.
  • the support structure 10 and the ring-like structure 16 are integrally molded as a molded part from a food grade plastic, e.g. Polypropylene, made.
  • FIG. 1 illustrates how the ring-like structure 16 keeps the screening device 6 at a distance from the capsule bottom 3, whereby a gap 18 is formed between the screening device 6 and the capsule bottom 3.
  • the intermediate space 18 contains two partial regions, namely an outer region 20 outside the annular structure 16 and an inner region 21 within the annular structure 16.
  • the outer region 20 and the inner region 21 communicate via passage openings 22, which in the exemplary embodiment are spaces between downwardly pointing teeth the ring-like structure 16 are formed.
  • passage openings 22 in the exemplary embodiment are spaces between downwardly pointing teeth the ring-like structure 16 are formed.
  • Figures 3 and 4 show the support structure 10 in three-dimensional view from above and from below, whereby the design of the ring-like structure 16 is particularly clear.
  • a number of large-area recesses 24 are provided, which are separated by radial ribs 25 from each other.
  • the cutting plane passes through two ribs 25;
  • the passage openings 22 shown in FIGS. 1 and 2 lie outside the section plane, but are nevertheless shown for clarity.
  • a textile fabric 28 attached, which serves as a filter.
  • the fabric 28 are a woven or nonwoven fabric.
  • Mixed forms are also conceivable, e.g. multilayer structures in which e.g. a nonwoven layer is applied to a fabric layer.
  • the fabric may be e.g. be configured as knitted fabrics, crochet galloon or knitwear.
  • Suitable materials for the textile fabric are threads and / or fibers of plastics and / or natural materials, but of metal.
  • Suitable plastics are e.g. Polyolefins (especially polypropylene and polyethylene) as well as polyamide.
  • Suitable natural products include, but are not limited to, cellulose. regenerated celluloses (e.g., viscose) may also be used.
  • Stainless steel is particularly suitable for the metals. It is also conceivable to use mixtures of different materials, including mixtures of plastics and natural materials or with metal threads.
  • the textile fabric 28 preferably has pores with a size in the range of 10 microns to 500 microns. Preferred ranges are 10 .mu.m to 200 .mu.m or 30 .mu.m to 150 .mu.m. When filaments are used, particularly preferred filament thicknesses are in the range from 10 ⁇ m to 200 ⁇ m or from 30 ⁇ m to 150 ⁇ m.
  • the Threads can also be designed as double or multiple threads (plied or twisted).
  • the textile fabric 28 is designed in one piece as an annular, planar structure and welded onto the circumferential projections 26 and 27.
  • Adhesive connections or point-like connections are also conceivable.
  • the fabric may also be e.g. be connected by impressing with the support structure, in all cases both from the top and the bottom of the support structure ago.
  • the manifold 8 is constructed similarly to the screen 6, but does not contain a ring-like structure.
  • a support structure 30 with a reinforcing edge 32 is provided in its central region with a downwardly facing protuberance 34.
  • recesses are covered with a textile fabric 36. The recesses are separated by radial ribs 37.
  • FIG. 5 shows a variant 8 'of the distributor device, corresponding parts being provided with the same reference numerals as in FIG. 1.
  • narrow radial slots 38 are used here.
  • Other types or arrangements of apertures in the manifold are also conceivable, e.g. a number of e.g. circular holes arranged along concentric lines.
  • the portion capsule 1 is used in a coffee machine designed specifically for the use of portion capsules is.
  • the portion capsule 1 is placed in a separate capsule holder, which is then inserted and locked in the coffee machine.
  • a mandrel punctcture means
  • Below the capsule bottom 3 is also a mandrel (piercing means), but in the example at this stage, the capsule soil is not completely penetrated, but only scribing.
  • pressurized water is passed through the opening in the capsule lid 2 and largely uniformly distributed by the distributor device 8, so that the water can extract the coffee powder 9 contained in the portion capsule 1.
  • This mandrel is configured as a hollow mandrel and is received in the protuberance 14, without damaging the screening device 6.
  • Extracted beverage enters the outer region 20 of the intermediate space 18 through the textile fabric 28 of the screening device 6, which acts as a filter, and from there passes through the through-openings 22 into the inner region 21 and through the hollow mandrel to the outside, e.g. in a parked under the capsule holder cup.
  • the coffee powder 9 is set up to brew Café Crema, and in the described brewing process, a pressure in the range of, for example, about 7 bar to 13 bar is built up via the coffee machine in the portion capsule 1. Since the passage openings 22 are relatively small, thereby high flow velocities occur in the region of the through openings 22, and it comes to turbulence and foaming, as desired at cafe Crema.
  • the Sieve device 6 so the functions as a filter device and as a crema image generator assigned to different areas, namely the textile fabric 28 and the ring-like structure 16 with the through holes 22. Therefore, it is possible to optimize the two functions independently by the design of these areas ,
  • espresso may be brewed, in which case the coffee powder is ground from coffee beans common for espresso.
  • the pressure used for scalding is usually higher, being e.g. in the range of 9 bar to 18 bar. Even with espresso, a crema formation is desired.
  • FIG. 6 shows a further embodiment of a screening device, designated here by 6 ', in longitudinal section.
  • the screening device 6 ' in turn has a support structure 40 with a reinforcing edge 42 and on its underside an annular structure 44 with through holes 45.
  • the filter function is not achieved by means of a textile fabric 28, but by a plurality of holes 46th provided in the support structure 40.
  • the sieve device 6 'or the support structure 40 with the ring-like structure 44 is produced in one piece as an injection-molded part.
  • Figures 7 and 8 show a variant of the sieve device of Figure 6, here denoted by 6 ". Corresponding parts are given the same reference numerals as in Figure 6. In the embodiment according to Figures 7 and 8, however, the holes 46 are annular 8, the respective axes are shown as dashed lines to the individual projections 48.
  • the projections 48 ensure a uniform spacing between the capsule bottom and the screening device 6 ", so that a well-defined outer region of the intermediate space is formed between the sieve device 6" and the capsule bottom and the extracted beverage can flow unhindered through the holes 46.
  • the screening device 6 " is in turn made in one piece with the ring-like structure 44 as a molded part made of a food-grade plastic.
  • FIG. 9 illustrates a further embodiment of a portion capsule, designated here by 1 ', in longitudinal section.
  • the portion capsule 1 ' is similar to the portion capsule 1 of Figure 1, which is why corresponding parts are provided with the same reference numerals.
  • the ring-like structure 16' formed on the underside of the screen 6 '' has a greater height than the ring-like structure 16, and wider through-holes 22 'are provided Through openings 22 from the embodiment according to FIG. 1.
  • the capsule bottom 3 ' has in its middle region an opening 50, which is provided with a piece of film 52 adhered from below, made of e.g. Aluminum foil is closed.
  • a piece of film 52 adhered from below, made of e.g. Aluminum foil is closed.
  • the piece of film could also be launched from above.
  • the film piece 52 forms a target weak point because it is e.g. can be penetrated by a mandrel easier than the rest of the material of the capsule bottom 3 '.
  • the portion capsule 1 ' is filled with a coffee powder 9', which is suitable for brewing filter coffee. If the portion capsule 1 'is inserted into a coffee machine of the type explained in connection with the exemplary embodiment according to FIG. 1, the lower mandrel already punctures the piece of film 52, when the capsule holder is locked. For brewing filter coffee, a relatively low water pressure is used, eg 1 bar to 7 bar.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Apparatus For Making Beverages (AREA)
  • Pens And Brushes (AREA)
  • Medicinal Preparation (AREA)
  • Materials For Medical Uses (AREA)
  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)

Abstract

The capsule has a filter device (6) arranged between a beverage substance (9) e.g. coffee, and a capsule base (3). The filter device is held at a distance to the base in a central area of the base using a ring-shaped structure (16), where an outer area (20) and an inner area (21) are defined through the structure in an intermediate space between the filter device and the capsule base. The outer area is connected with the inner area through openings (22), where the openings are relatively smaller for formation of the cream.

Description

Die Erfindung betrifft eine Portionskapsel, die insbesondere zum Brühen einzelner Kaffeeportionen (eine Tasse oder zwei Tassen eines Kaffeegetränks) in einer für die Verwendung von Portionskapseln bestimmten Kaffeemaschine geeignet ist.The invention relates to a portion capsule which is particularly suitable for brewing individual coffee portions (one cup or two cups of a coffee beverage) in a coffee machine intended for the use of portion capsules.

In der EP 1 344 722 A1 ist eine Portionskapsel mit einem Kapseldeckel und einem Kapselboden beschrieben, die im Lieferzustand allseitig geschlossen ist und eine partikelförmige, mittels Wasser extrahierbare Kaffeesubstanz enthält. Dabei ist zwischen dem Kapseldeckel und der Kaffeesubstanz eine Verteilereinrichtung und zwischen der Kaffeesubstanz und dem Kapselboden eine Sammeleinrichtung angeordnet. Die Verteilereinrichtung sowie die Sammeleinrichtung weisen jeweils eine Anzahl von Öffnungen und Prägungen zur Bildung von Flüssigkeitskanälen auf. Diese Portionskapsel wird in einer speziellen Kaffeemaschine verwendet, wobei der Kapseldeckel und der Kapselboden beim Einsetzen der Portionskapsel in die Maschine oder während des Brühvorgangs perforiert werden. So gelangt durch eine Öffnung in dem Kapseldeckel heißes Wasser auf die Verteilereinrichtung und wird davon im Wesentlichen gleichmäßig verteilt, sodass die Kaffeesubstanz in der Portionskapsel weitgehend gleichmäßig extrahiert werden kann. Das fertige Getränk wird von der Sammeleinrichtung zu einer Öffnung im Kapselboden geleitet. Dabei strömt es zunächst durch die Öffnungen der Sammeleinrichtung, die eine Sieb- oder Filterfunktion haben, und kann danach durch einen Hohlraum zwischen der Sammeleinrichtung und dem Kapselboden, der zwischen den Prägungen der Sammeleinrichtung ausgebildet ist, zu der Öffnung im Kapselboden fließen. Dort tritt das Getränk aus der Portionskapsel aus und kann von einem Gefäß (z.B. einer Tasse) aufgefangen werden.In the EP 1 344 722 A1 a portion capsule is described with a capsule lid and a capsule bottom, which is closed on all sides in the delivery state and contains a particulate, extractable by water coffee substance. In this case, a distributor device is arranged between the capsule lid and the coffee substance and a collecting device is arranged between the coffee substance and the capsule bottom. The distribution device and the collection device each have a number of openings and embossments for the formation of liquid channels on. This portion capsule is used in a special coffee machine, wherein the capsule lid and the capsule bottom are perforated when inserting the portion capsule into the machine or during the brewing process. Thus, hot water reaches the distribution device through an opening in the capsule lid and is distributed substantially uniformly therefrom, so that the coffee substance in the portion capsule can be extracted substantially uniformly. The finished beverage is passed from the collector to an opening in the capsule bottom. In this case, it first flows through the openings of the collecting device, which have a screen or filter function, and can then flow through a cavity between the collecting device and the capsule bottom, which is formed between the embossments of the collecting device, to the opening in the capsule bottom. There, the beverage exits from the portion capsule and can be collected from a vessel (eg a cup).

Die Sammeleinrichtung der vorbekannten Portionskapsel hat neben den erwähnten Funktionen als Leiteinrichtung, als Sieb oder Filter und als Abstandshalter noch die zusätzliche Funktion, für eine Crema-Bildung (Schaum) bei dem Kaffeegetränk zu sorgen, falls das gewünscht ist. Dies ist insbesondere bei Cafe Crema und Espresso der Fall, während z.B. in Deutschland normaler Filterkaffee gerade keine Crema erhalten soll. Bei der vorbekannten Portionskapsel lässt sich jedoch die Crema-Bildung in Zusammenhang mit den anderen Funktionen der Sammeleinrichtung nicht in befriedigendem Maße steuern.The collecting device of the previously known portion capsule has, in addition to the functions mentioned as a guide, as a sieve or filter and as a spacer, the additional function of providing a crema formation (foam) in the coffee beverage, if desired. This is especially the case with Cafe Crema and Espresso, while e.g. in Germany normal filter coffee just should not get a crema. In the case of the previously known portion capsule, however, the crema formation in connection with the other functions of the collecting device can not be controlled satisfactorily.

Es ist Aufgabe der Erfindung, eine Portionskapsel mit einer mittels Wasser extrahierbaren Getränkesubstanz zu schaffen, bei der sich die Crema-Bildung besser einstellen lässt als bei der vorbekannten Portionskapsel.It is an object of the invention to provide a portion capsule with a water-extractable beverage substance, in which the crema formation can be better adjusted than in the previously known portion capsule.

Diese Aufgabe wird gelöst durch eine Portionskapsel mit den Merkmalen des Anspruchs 1. Vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen.This object is achieved by a portion capsule with the features of claim 1. Advantageous embodiments of the invention will become apparent from the dependent claims.

Die erfindungsgemäße Portionskapsel weist einen Kapseldeckel und einen Kapselboden auf und ist im Lieferzustand allseitig geschlossen. Sie enthält eine partikelförmige, mittels Wasser extrahierbare Getränkesubstanz, vorzugsweise gemahlenen Kaffee. Zwischen der Getränkesubstanz und dem Kapselboden ist eine Siebeinrichtung angeordnet, die eine Sieb- oder Filterfunktion erfüllt.The portion capsule according to the invention has a capsule lid and a capsule bottom and is closed on all sides in the delivery state. It contains a particulate water-extractable beverage substance, preferably ground coffee. Between the beverage substance and the capsule bottom a sieve device is arranged, which fulfills a sieve or filter function.

Die Siebeinrichtung ist im zentralen Bereich des Kapselbodens mittels einer ringartigen Struktur auf Abstand zum Kapselboden gehalten. Durch die ringartige Struktur ist in dem Zwischenraum zwischen Siebeinrichtung und Kapselboden ein Außenbereich (der außerhalb der ringartigen Struktur liegt) und ein Innenbereich (der innerhalb der ringartigen Struktur liegt) definiert. Der Begriff "ringartige Struktur" ist hier nicht als auf einen in Draufsicht kreisförmig erscheinenden Ring beschränkt zu verstehen, sondern allgemeiner; so kann die ringartige Struktur in Draufsicht z.B. viereckig oder auch unregelmäßig geformt sein und muss in Umfangsrichtung auch nicht notwendig geschlossen sein. Der Außenbereich und der Innenbereich der ringartigen Struktur stehen über Durchgangsöffnungen in Verbindung. Vorzugsweise beträgt die Höhe der ringartigen Struktur weniger als 20% der Höhe der Portionskapsel, z.B. weniger als 10%.The screening device is held in the central region of the capsule bottom by means of a ring-like structure at a distance from the capsule bottom. By the ring-like structure is defined in the space between the sieve device and capsule bottom, an outer region (which is outside the ring-like structure) and an inner region (which lies within the ring-like structure). The term "ring-like structure" is not to be understood as limited to a ring appearing circular in plan view, but more generally; so the ring-like structure in plan view, e.g. square or irregular shaped and must not necessarily be closed in the circumferential direction. The outer area and the inner area of the ring-like structure are connected via passage openings. Preferably, the height of the ring-like structure is less than 20% of the height of the portion capsule, e.g. less than 10%.

Die ringartige Struktur der erfindungsgemäßen Portionskapsel ist an der Bildung eines Zwischenraums zwischen der Siebeinrichtung und dem Kapselboden beteiligt. Dieser Zwischenraum nimmt während des Brühvorgangs durch die Siebeinrichtung hindurchgetretenes extrahiertes Getränk auf, das durch eine im zentralen Bereich des Kapselbodens geschaffene Öffnung die Portionskapsel verlassen kann. Dabei muss es die Durchgangsöffnungen durchströmen. Eine Crema-Bildung lässt sich über die Gestaltung der Durchgangsöffnungen steuern. Dies ist völlig unabhängig von der Ausbildung der Siebeinrichtung. Daher sind bei der erfindungsgemäßen Portionskapsel die Einrichtungen für die Sieb- bzw. Filterfunktion und für die Crema-Bildung entkoppelt, was die Gestaltungsmöglichkeiten erhöht.The ring-like structure of the portion capsule according to the invention is involved in the formation of a gap between the sieve device and the capsule bottom. This space takes during the brewing process by the sieve means penetrated extracted beverage, which created by a created in the central region of the capsule floor opening Can leave the portion capsule. It must flow through the through holes. Crema formation can be controlled via the design of the passage openings. This is completely independent of the design of the screening device. Therefore, in the portion capsule according to the invention, the devices for the screen or filter function and for the crema formation are decoupled, which increases the design options.

Bei bevorzugten Ausführungsformen weist die Getränkesubstanz gemahlenen Kaffee auf. Dabei können die Durchgangsöffnungen relativ klein und zur Ausbildung einer Crema eingerichtet sein. Denn wenn Kaffee durch kleine Öffnungen strömt, insbesondere bei höherem Druck (z.B. 7 bar bis 13 bar oder 9 bar bis 18 bar, wie für Cafe Crema bzw. Espresso üblich), führen Verwirbelungen zum Einschluss von Luft, wodurch sich die Crema ausbildet.In preferred embodiments, the beverage substance comprises ground coffee. In this case, the passage openings can be relatively small and designed to form a crema. Because when coffee flows through small openings, especially at higher pressure (e.g., 7 bar to 13 bar or 9 bar to 18 bar, as is customary for Cafe Crema or espresso), turbulence causes entrapment of air, forming the crema.

Wenn dagegen die Durchgangsöffnungen relativ groß sind, ist insbesondere bei geringeren Drücken (z.B. 1 bar bis 7 bar für Filterkaffee) die Strömung weitgehend laminar, sodass keine oder nur wenig Crema entsteht. Ein Fachmann kann durch Versuche leicht herausfinden, wie er im Einzelfall Durchgangsöffnungen in Größe und Form optimal gestaltet.On the other hand, if the ports are relatively large, especially at lower pressures (e.g., 1 bar to 7 bar for filter coffee), the flow is largely laminar, with little or no crema. A person skilled in the art can easily find out through experiments how he optimally designs passage openings in size and shape in individual cases.

Bei bevorzugten Ausführungsformen der Erfindung weist die Siebeinrichtung eine Tragstruktur auf. Vorzugsweise ist die ringartige Struktur integral mit der Tragstruktur ausgebildet, z.B. als Spritzteil. Die Tragstruktur kann einen oder mehrere Abstandshalter aufweisen, die außerhalb des zentralen Bereichs des Kapselbodens am Kapselboden anliegen, sodass diese Abstandshalter zusammen mit der ringartigen Struktur im zentralen Bereich für den gewünschten Zwischenraum zwischen Siebeinrichtung und Kapselboden sorgen. Dabei muss sich der Zwischenraum nicht notwendig über die gesamte Fläche des Kapselbodens erstrecken. Vorzugsweise ist der Abstandshalter oder sind die Abstandshalter als Vorsprung ausgebildet, z.B. als eine periphere Ringwulst, die in Richtung auf den Kapselboden vorspringt, oder als eine Anzahl von punktartigen Vorsprüngen.In preferred embodiments of the invention, the screening device has a support structure. Preferably, the ring-like structure is formed integrally with the support structure, for example as a molded part. The support structure may comprise one or more spacers which bear against the capsule bottom outside the central region of the capsule bottom so that these spacers, together with the annular structure in the central region, provide the desired gap between the sieve device and the capsule bottom. In this case, the gap does not necessarily extend over the entire surface of the capsule bottom. Preferably, the spacer or are the Spacer formed as a projection, for example as a peripheral annular bead, which protrudes in the direction of the capsule bottom, or as a number of point-like projections.

Die Tragstruktur kann mit mindestens einer Aussparung versehen sein, die mit einem textilen Flächengebilde überdeckt ist, z.B. einem Gewebe oder einem Vlies. Näheres zu derartigen Ausführungsformen findet sich in der Deutschen Patentanmeldung 10 2005 016 297 . Dabei lässt sich das textile Flächengebilde z.B. durch Kleben, Schweißen, Aufprägen oder Einbetten mit der Tragstruktur verbinden.The support structure may be provided with at least one recess which is covered with a textile fabric, such as a fabric or a nonwoven. More about such embodiments can be found in the German Patent Application 10 2005 016 297 , In this case, the textile fabric can be connected, for example, by gluing, welding, embossing or embedding with the support structure.

Die Siebeinrichtung kann auch ein Lochsieb aufweisen, das vorzugsweise einstückig mit der Tragstruktur ausgebildet ist, z.B. als Spritzteil. Da sich mit heutigen Spritzgusstechniken selbst so feine Löcher ausbilden lassen, wie sie z.B. für einen Kaffeefilter erforderlich sind, kann eine derartige einstückige Konstruktion Preisvorteile haben. Denkbar ist es aber auch, Aussparungen in einer Tragstruktur mit herkömmlichem Filterpapier zu belegen.The screening device may also comprise a perforated screen, which is preferably formed integrally with the support structure, e.g. as a molded part. Since with today's injection molding techniques even such fine holes can be formed as e.g. are required for a coffee filter, such a one-piece construction can have price advantages. It is also conceivable, however, to occupy recesses in a support structure with conventional filter paper.

Bei bevorzugten Ausführungsformen der Erfindung weist die Tragstruktur in ihrem zentralen Bereich eine Ausstülpung auf, die von der ringartigen Struktur weg gerichtet und zur Aufnahme eines Dorns an einer auf die Portionskapsel abgestimmten Kaffeemaschine eingerichtet ist. Portionskapseln mit einer derartigen Ausstülpung sind für Kaffeemaschinen bestimmt, bei denen die Portionskapsel am Kapselboden mit Hilfe eines Dorns perforiert wird. Der Dorn soll nur den Kapselboden durchdringen, aber nicht die Siebeinrichtung beschädigen, weshalb die Siebeinrichtung dort ins Innere der Portionskapsel zurückspringt, wo der Dorn eindringt, also im Bereich der Ausstülpung.In preferred embodiments of the invention, the support structure in its central region on a protuberance, which is directed away from the ring-like structure and adapted for receiving a mandrel on a coffee capsule adapted to the capper. Portion capsules with such a protuberance are intended for coffee machines in which the portion capsule is perforated on the capsule bottom by means of a mandrel. The mandrel should penetrate only the capsule bottom, but not damage the screening device, which is why the screening device springs back into the inside of the portion capsule, where the mandrel penetrates, ie in the region of the protuberance.

Ferner ist es vorteilhaft, wenn die Tragstruktur an ihrer Peripherie einen Verstärkungsrand aufweist, z.B. einen Rand, der von einer scheibenartigen Struktur absteht. Für die Tragstruktur sind grundsätzlich viele und ganz unterschiedliche Ausgestaltungen denkbar.Furthermore, it is advantageous if the support structure has a reinforcing edge on its periphery, e.g. an edge that protrudes from a disc-like structure. In principle, many and very different configurations are conceivable for the support structure.

Ferner kann die erfindungsgemäße Portionskapsel eine Verteilereinrichtung aufweisen, die zwischen dem Kapseldeckel und der Getränkesubstanz angeordnet ist. Die Verteilereinrichtung kann z.B. als (ebene) Platte mit Durchbrechungen oder auch als gekrümmte Struktur mit Durchbrechungen ausgebildet sein, wobei die Durchbrechungen z.B. als radial verlaufende Schlitze und/oder als Löcher ausgestaltet sein können. Vorzugsweise hat die Verteilereinrichtung keine kanalartigen Prägungen. Die Verteilereinrichtung bewirkt, dass sich am Kapseldeckel zum Extrahieren des Getränks eingegebenes Wasser weitgehend gleichmäßig in der Getränkesubstanz verteilt.Furthermore, the portion capsule according to the invention may have a distributor device which is arranged between the capsule lid and the beverage substance. The distribution device may e.g. be formed as (flat) plate with openings or as a curved structure with openings, wherein the apertures, e.g. can be configured as radially extending slots and / or as holes. Preferably, the manifold has no channel-like embossments. The distribution device causes water introduced on the capsule lid to extract the beverage substantially evenly distributed in the beverage substance.

Bei einer bevorzugten Ausführungsform weist auch die Verteilereinrichtung in ihrem zentralen Bereich eine Ausstülpung auf, die hier von dem Kapseldeckel weg gerichtet und zur Aufnahme eines Dorns an einer auf die Portionskapsel abgestimmten Kaffeemaschine eingerichtet ist, über den das Wasser in die Portionskapsel eingebracht wird. Ähnlich wie bei der zuvor erläuterten Ausstülpung der Siebeinrichtung wird auch die Ausstülpung der Verteilereinrichtung beim Eindringen des Dorns in die Portionskapsel nicht beschädigt.In a preferred embodiment, the distribution device also has a protuberance in its central region, which is here directed away from the capsule lid and adapted to receive a mandrel on a coffee machine adapted to the portion capsule, via which the water is introduced into the portion capsule. Similar to the previously described protuberance of the screening device, the protuberance of the distributor device is not damaged when the mandrel penetrates into the portion capsule.

Der Kapselboden kann in seinem zentralen Bereich eine Sollschwachstelle aufweisen. Unter Kapselboden ist generell die Seite der Portionskapsel zu verstehen, aus der das Getränk aus der Portionskapsel austritt, also unabhängig davon, ob sich der Kapselboden bei einer in eine Kaffeemaschine eingelegten Portionskapsel z.B. oben oder unten befindet. Die Sollschwachstelle erleichtert das Anstechen des Kapselbodens in der Kaffeemaschine. Vorzugsweise weist die Sollschwachstelle ein Folienstück auf, das schwächer ist als der Kapselboden in der Umgebung des Folienstücks.The capsule bottom may have a desired weak point in its central area. Capsule bottom is generally understood to mean the side of the portion capsule from which the beverage emerges from the portion capsule, that is, regardless of whether the capsule bottom is located at the top or bottom of a portion capsule inserted into a coffee machine. The weak point of weakness facilitates the piercing of the capsule bottom in the coffee machine. Preferably, the desired weak point has a piece of film which is weaker than the capsule bottom in the vicinity of the film piece.

Die Getränkesubstanz kann auch andere Substanzen als gemahlenen Kaffee aufweisen, z.B. Tee, Schokolade (wobei wiederum die Möglichkeiten der Erfindung zum Steuern einer Crema-Bildung nützlich sind), Instantsuppe, Milchpulver, flüssige Milch (als Zusatz) usw. oder Mischungen derartiger Substanzen, auch mit gemahlenem Kaffee.The beverage substance may also comprise substances other than ground coffee, e.g. Tea, chocolate (again, the possibilities of the invention are useful for controlling crema formation), instant soup, milk powder, liquid milk (as an additive), etc., or mixtures of such substances, including ground coffee.

Im Folgenden wird die Erfindung anhand von Ausführungsbeispielen weiter beschrieben. Die Zeichnungen zeigen in

Figur 1
einen Längsschnitt durch eine Ausführungsform einer erfindungsgemäßen Portionskapsel, die zum Brühen von Cafe Crema eingerichtet ist,
Figur 2
einen Längsschnitt durch die Siebeinrichtung der Portionskapsel aus Figur 1,
Figur 3
eine dreidimensionale Ansicht der Tragstruktur der Siebeinrichtung aus Figur 2 von oben,
Figur 4
eine dreidimensionale Ansicht der Tragstruktur der Siebeinrichtung aus Figur 2 von unten,
Figur 5
eine dreidimensionale Ansicht einer Variante der Verteilereinrichtung der Portionskapsel aus Figur 1 von unten,
Figur
6 einen Längsschnitt durch eine zweite Ausführungsform einer Siebeinrichtung,
Figur 7
eine dreidimensionale Ansicht einer Varianten der Siebeinrichtung gemäß Figur 6 von unten,
Figur 8
eine Ausschnittsvergrößerung aus Figur 7 und
Figur 9
einen Längsschnitt durch eine weitere Ausführungsform einer erfindungsgemäßen Portionskapsel, die zum Brühen von Filterkaffee eingerichtet ist.
In the following, the invention will be further described by means of exemplary embodiments. The drawings show in
FIG. 1
a longitudinal section through an embodiment of a portion capsule according to the invention, which is set up for brewing Cafe Crema,
FIG. 2
3 a longitudinal section through the screening device of the portion capsule from FIG. 1,
FIG. 3
a three-dimensional view of the support structure of the screening device of Figure 2 from above,
FIG. 4
a three-dimensional view of the support structure of the screening device of Figure 2 from below,
FIG. 5
3 shows a three-dimensional view of a variant of the distribution device of the portion capsule from FIG. 1 from below,
figure
6 shows a longitudinal section through a second embodiment of a screening device,
FIG. 7
3 shows a three-dimensional view of a variant of the screening device according to FIG. 6 from below,
FIG. 8
an enlarged detail of Figure 7 and
FIG. 9
a longitudinal section through a further embodiment of a portion capsule according to the invention, which is set up for brewing filter coffee.

In Figur 1 ist eine Ausführungsform einer Portionskapsel 1 im Längsschnitt dargestellt. Die Portionskapsel 1 hat einen Kapseldeckel 2, einen Kapselboden 3 und eine umlaufende Wandung 4, die im Ausführungsbeispiel einstückig mit dem Kapselboden 3 ausgebildet ist. Vom oberen Ende der Wandung 4 steht ein ringförmiger Flansch 5 ab, auf dem im Ausführungsbeispiel der Kapseldeckel 2 aufgesiegelt ist. Die Portionskapsel 1 ist daher im Lieferzustand allseitig geschlossen.1 shows an embodiment of a portion capsule 1 is shown in longitudinal section. The portion capsule 1 has a capsule lid 2, a capsule bottom 3 and a peripheral wall 4, which is formed integrally with the capsule bottom 3 in the embodiment. From the upper end of the wall 4 is an annular flange 5, on which in the embodiment of the capsule lid 2 is sealed. The portion capsule 1 is therefore closed on all sides in the delivery state.

Im Innenraum der Portionskapsel 1 befinden sich über dem Kapselboden 3 eine Siebeinrichtung 6 und unter dem Kapseldeckel 2 eine Verteilereinrichtung 8. Der Raum zwischen der Siebeinrichtung 6 und der Verteilereinrichtung 8 ist mit einem Kaffeepulver 9 gefüllt, und zwar im Ausführungsbeispiel gemäß Figur 1 mit einem Kaffeepulver, wie es zum Brühen von Cafe Crema geeignet ist.In the interior of the portion capsule 1 are located above the capsule bottom 3 a sieve 6 and under the capsule cover 2, a manifold 8. The space between the sieve 6 and the manifold 8 is filled with a coffee powder 9, in the embodiment of Figure 1 with a coffee powder as it is suitable for brewing Cafe Crema.

Die Begriffe "oben" und "unten" beziehen sich hier auf die Darstellung in den Figuren, unabhängig davon, in welcher Orientierung eine Portionskapsel bei der Verwendung in eine Kaffeemaschine eingelegt wird. Im Prinzip kann sich dabei der Boden auch oben und der Deckel unten befinden. Bei der hier gewählten Terminologie wird das Brühwasser am Kapseldeckel in die Portionskapsel eingeleitet, während das fertige Getränk am Kapselboden austritt. Wie dies im Einzelnen erfolgen kann, wird weiter unten erläutert.The terms "top" and "bottom" here refer to the illustration in the figures, regardless of the orientation in which a portion capsule is inserted when used in a coffee machine. In principle, the bottom can also be at the top and the lid at the bottom. In the terminology chosen here, the brewing water is introduced into the capsule cap on the capsule lid, while the finished beverage emerges from the capsule bottom. How this can be done in detail is explained below.

Im Ausführungsbeispiel sind der Kapselboden 3 und die Wandung 4 der Portionskapsel 1 aus einem Kunststoff gefertigt, z.B. als Spritzteil oder als Tiefziehteil. Dabei können auch mehrschichtige Materialien zum Einsatz kommen, wie aus der Technologie von Lebensmittelverpackungen bekannt. Der Kapseldeckel 2 weist im Ausführungsbeispiel eine Verbundfolie mit Aluminium und Kunststoffen auf.In the embodiment, the capsule bottom 3 and the wall 4 of the portion capsule 1 are made of a plastic, e.g. as a molded part or as a deep-drawn part. It can also be used multilayer materials, as known from the technology of food packaging. The capsule lid 2 has in the exemplary embodiment a composite foil with aluminum and plastics.

In Figur 2 ist die Siebeinrichtung 6 nochmals im Längsschnitt gezeigt. Die Siebeinrichtung 6 enthält eine Tragstruktur 10 mit einem hochstehenden Verstärkungsrand 12, der an seinem oberen Ende flanschartig nach außen vorspringt. Im mittleren Bereich der Tragstruktur 10 ist eine kegelartige Ausstülpung 14 vorgesehen, die nach oben weist. An der Unterseite befindet sich eine ringartige Struktur 16. Im Ausführungsbeispiel sind die Tragstruktur 10 und die ringartige Struktur 16 einstückig als Spritzteil aus einem lebensmittelgeeigneten Kunststoff, z.B. Polypropylen, hergestellt.In Figure 2, the screening device 6 is shown again in longitudinal section. The screening device 6 includes a support structure 10 having a raised reinforcing edge 12 projecting outwardly at its upper end in a flange-like manner. In the middle region of the support structure 10, a conical protuberance 14 is provided which faces upwards. At the bottom there is a ring-like structure 16. In the embodiment, the support structure 10 and the ring-like structure 16 are integrally molded as a molded part from a food grade plastic, e.g. Polypropylene, made.

In Figur 1 ist veranschaulicht, wie die ringartige Struktur 16 die Siebeinrichtung 6 auf Abstand zum Kapselboden 3 hält, wodurch ein Zwischenraum 18 zwischen der Siebeinrichtung 6 und dem Kapselboden 3 ausgebildet ist. Der Zwischenraum 18 enthält zwei Teilbereiche, nämlich einen Außenbereich 20 außerhalb der ringartigen Struktur 16 und einen Innenbereich 21 innerhalb der ringartigen Struktur 16. Der Außenbereich 20 und der Innenbereich 21 stehen über Durchgangsöffnungen 22 in Verbindung, die im Ausführungsbeispiel als Zwischenräume zwischen nach unten weisenden Zacken der ringartigen Struktur 16 ausgebildet sind. Bei einer alternativen Ausgestaltung ist es auch denkbar, die Durchgangsöffnungen als Bohrungen vorzusehen, die ringsum von Material der ringartigen Struktur begrenzt sind.FIG. 1 illustrates how the ring-like structure 16 keeps the screening device 6 at a distance from the capsule bottom 3, whereby a gap 18 is formed between the screening device 6 and the capsule bottom 3. The intermediate space 18 contains two partial regions, namely an outer region 20 outside the annular structure 16 and an inner region 21 within the annular structure 16. The outer region 20 and the inner region 21 communicate via passage openings 22, which in the exemplary embodiment are spaces between downwardly pointing teeth the ring-like structure 16 are formed. In an alternative embodiment, it is also conceivable to provide the passage openings as bores, which are bounded by material around the ring-like structure.

Die Figuren 3 und 4 zeigen die Tragstruktur 10 in dreidimensionaler Ansicht von oben und von unten, wodurch die Gestaltung der ringartigen Struktur 16 besonders anschaulich wird. An der Tragstruktur 10 ist eine Anzahl großflächiger Aussparungen 24 vorgesehen, die durch radiale Rippen 25 voneinander getrennt sind. In den Figuren 1 und 2 verläuft die Schnittebene durch zwei Rippen 25; die in den Figuren 1 und 2 gezeigten Durchgangsöffnungen 22 liegen außerhalb der Schnittebene, sind aber zur Verdeutlichung trotzdem dargestellt.Figures 3 and 4 show the support structure 10 in three-dimensional view from above and from below, whereby the design of the ring-like structure 16 is particularly clear. On the support structure 10, a number of large-area recesses 24 are provided, which are separated by radial ribs 25 from each other. In Figures 1 and 2, the cutting plane passes through two ribs 25; The passage openings 22 shown in FIGS. 1 and 2 lie outside the section plane, but are nevertheless shown for clarity.

Über den Aussparungen 24 ist auf zwei umlaufenden Vorsprüngen 26 und 27 ein textiles Flächengebilde 28 angebracht, das als Filter dient. Beispiele für das textile Flächengebilde 28 sind ein Gewebe oder ein Vlies. Mischformen sind ebenfalls denkbar, z.B. mehrlagige Gebilde, bei denen z.B. eine Vlieslage auf eine Gewebelage aufgebracht ist. Ferner kann das textile Flächengebilde z.B. als Gewirke, Häkelgalonware oder Gestricke ausgestaltet sein.About the recesses 24 is on two circumferential projections 26 and 27, a textile fabric 28 attached, which serves as a filter. Examples of the fabric 28 are a woven or nonwoven fabric. Mixed forms are also conceivable, e.g. multilayer structures in which e.g. a nonwoven layer is applied to a fabric layer. Furthermore, the fabric may be e.g. be configured as knitted fabrics, crochet galloon or knitwear.

Als Materialien für das textile Flächengebilde kommen Fäden und/oder Fasern aus Kunststoffen und/oder Naturstoffen in Betracht, aber aus Metall. Geeignete Kunststoffe sind z.B. Polyolefine (insbesondere Polypropylen und Polyethylen) sowie Polyamid. Zu den geeigneten Naturstoffen zählen vor allem Cellulose, es können aber z.B. auch regenerierte Cellulosen (z.B. Viskose) verwendet werden. Bei den Metallen ist Edelstahl besonders geeignet. Auch ist es denkbar, Mischungen verschiedener Materialien einzusetzen, auch Mischungen von Kunststoffen und Naturstoffen oder mit Metallfäden.Suitable materials for the textile fabric are threads and / or fibers of plastics and / or natural materials, but of metal. Suitable plastics are e.g. Polyolefins (especially polypropylene and polyethylene) as well as polyamide. Suitable natural products include, but are not limited to, cellulose. regenerated celluloses (e.g., viscose) may also be used. Stainless steel is particularly suitable for the metals. It is also conceivable to use mixtures of different materials, including mixtures of plastics and natural materials or with metal threads.

Das textile Flächengebilde 28 hat vorzugsweise Poren mit einer Größe im Bereich von 10 µm bis 500 µm. Bevorzugte Bereiche liegen bei 10 µm bis 200 µm oder bei 30 µm bis 150 µm. Bei der Verwendung von Fäden liegen besonders bevorzugte Fadenstärken im Bereich von 10 µm bis 200 µm oder von 30 µm bis 150 µm. Die Fäden können auch als Doppel- oder Mehrfachfäden (gefacht oder verzwirnt) gestaltet sein.The textile fabric 28 preferably has pores with a size in the range of 10 microns to 500 microns. Preferred ranges are 10 .mu.m to 200 .mu.m or 30 .mu.m to 150 .mu.m. When filaments are used, particularly preferred filament thicknesses are in the range from 10 μm to 200 μm or from 30 μm to 150 μm. The Threads can also be designed as double or multiple threads (plied or twisted).

Im Ausführungsbeispiel ist das textile Flächengebilde 28 einstückig als kreisringartige, ebene Struktur gestaltet und auf den umlaufenden Vorsprüngen 26 und 27 aufgeschweißt. Klebeverbindungen oder punktartige Verbindungen (insbesondere, wenn das textile Flächengebilde dicht an der Tragstruktur anliegt) sind ebenfalls denkbar. Anstelle durch Schweißen oder Kleben kann das textile Flächengebilde auch z.B. durch Aufprägen mit der Tragstruktur verbunden werden, in allen Fällen sowohl von der Oberseite als auch der Unterseite der Tragstruktur her. Ferner ist es denkbar, das textile Flächengebilde in einem Spritzgießverfahren in die jeweilige Tragstruktur einzubetten.In the exemplary embodiment, the textile fabric 28 is designed in one piece as an annular, planar structure and welded onto the circumferential projections 26 and 27. Adhesive connections or point-like connections (in particular, if the textile fabric rests close to the support structure) are also conceivable. Instead of welding or gluing, the fabric may also be e.g. be connected by impressing with the support structure, in all cases both from the top and the bottom of the support structure ago. Furthermore, it is conceivable to embed the textile fabric in an injection molding process in the respective support structure.

Die Verteilereinrichtung 8 ist ähnlich konstruiert wie die Siebeinrichtung 6, enthält aber keine ringartige Struktur. Eine Tragstruktur 30 mit einem Verstärkungsrand 32 ist in ihrem Zentralbereich mit einer nach unten weisenden Ausstülpung 34 versehen. In Figur 1 nicht dargestellte Aussparungen sind mit einem textilen Flächengebilde 36 überdeckt. Die Aussparungen sind durch radiale Rippen 37 voneinander getrennt.The manifold 8 is constructed similarly to the screen 6, but does not contain a ring-like structure. A support structure 30 with a reinforcing edge 32 is provided in its central region with a downwardly facing protuberance 34. Not shown in Figure 1 recesses are covered with a textile fabric 36. The recesses are separated by radial ribs 37.

In Figur 5 ist eine Variante 8' der Verteilereinrichtung gezeigt, wobei einander entsprechende Teile mit denselben Bezugszeichen versehen sind wie in Figur 1. Anstelle der mit einem textilen Flächengebilde abgedeckten Aussparungen kommen hier jedoch schmale radiale Schlitze 38 zur Anwendung. Andere Arten oder Anordnungen von Durchbrechungen in der Verteilereinrichtung sind ebenfalls denkbar, z.B. eine Anzahl von z.B. kreisrunden Löchern, die entlang konzentrischer Linien angeordnet sind.FIG. 5 shows a variant 8 'of the distributor device, corresponding parts being provided with the same reference numerals as in FIG. 1. Instead of the recesses covered with a textile fabric, however, narrow radial slots 38 are used here. Other types or arrangements of apertures in the manifold are also conceivable, e.g. a number of e.g. circular holes arranged along concentric lines.

Die Portionskapsel 1 wird in einer Kaffeemaschine benutzt, die speziell für die Verwendung von Portionskapseln konstruiert ist. Bei einem Beispiel für eine derartige Kaffeemaschine wird die Portionskapsel 1 in einen separaten Kapselhalter eingelegt, der anschließend in die Kaffeemaschine eingesetzt und verriegelt wird. Dabei dringt ein Dorn (Einstichmittel) durch den zentralen Bereich des Kapseldeckels 2 in die Ausstülpung 34 ein, ohne die Verteilereinrichtung 8 zu beschädigen. Unterhalb des Kapselbodens 3 befindet sich ebenfalls ein Dorn (Einstichmittel), der aber im Beispiel in diesem Stadium den Kapselboden noch nicht vollständig durchdringt, sondern nur anritzt. Anschließend wird Druckwasser durch die Öffnung im Kapseldeckel 2 geleitet und von der Verteilereinrichtung 8 weitgehend gleichmäßig verteilt, sodass das Wasser das in der Portionskapsel 1 befindliche Kaffeepulver 9 extrahieren kann. Dabei steigt der Druck in der Portionskapsel 1 an, sodass sich der Kapselboden 3 etwas nach außen wölbt und von dem unterhalb des Kapselbodens befindlichen Dorn ganz durchdrungen wird. Dieser Dorn ist als Hohldorn ausgestaltet und wird in der Ausstülpung 14 aufgenommen, ohne die Siebeinrichtung 6 zu beschädigen.The portion capsule 1 is used in a coffee machine designed specifically for the use of portion capsules is. In an example of such a coffee maker, the portion capsule 1 is placed in a separate capsule holder, which is then inserted and locked in the coffee machine. In this case, a mandrel (puncture means) penetrates through the central region of the capsule lid 2 into the protuberance 34, without damaging the distributor device 8. Below the capsule bottom 3 is also a mandrel (piercing means), but in the example at this stage, the capsule soil is not completely penetrated, but only scribing. Subsequently, pressurized water is passed through the opening in the capsule lid 2 and largely uniformly distributed by the distributor device 8, so that the water can extract the coffee powder 9 contained in the portion capsule 1. In this case, the pressure rises in the portion capsule 1, so that the capsule bottom 3 bulges slightly outward and is completely penetrated by the mandrel located below the capsule bottom. This mandrel is configured as a hollow mandrel and is received in the protuberance 14, without damaging the screening device 6.

Extrahiertes Getränk tritt durch das textile Flächengebilde 28 der Siebeinrichtung 6, das als Filter wirkt, in den Außenbereich 20 des Zwischenraums 18 ein und gelangt von dort durch die Durchgangsöffnungen 22 in den Innenbereich 21 und durch den Hohldorn nach außen, z.B. in eine unter dem Kapselhalter abgestellte Tasse.Extracted beverage enters the outer region 20 of the intermediate space 18 through the textile fabric 28 of the screening device 6, which acts as a filter, and from there passes through the through-openings 22 into the inner region 21 and through the hollow mandrel to the outside, e.g. in a parked under the capsule holder cup.

In diesem Beispiel ist das Kaffeepulver 9 zum Brühen von Cafe Crema eingerichtet, und bei dem geschilderten Brühvorgang wird über die Kaffeemaschine in der Portionskapsel 1 ein Druck im Bereich von z.B. etwa 7 bar bis 13 bar aufgebaut. Da die Durchgangsöffnungen 22 relativ klein sind, treten dabei hohe Strömungsgeschwindigkeiten im Bereich der Durchgangsöffnungen 22 auf, und es kommt zu Verwirbelungen und einer Schaumbildung, wie bei Cafe Crema erwünscht. Durch die Konstruktion der Siebeinrichtung 6 werden also die Funktionen als Filtereinrichtung und als Crema-Bildner verschiedenen Bereichen zugeordnet, nämlich dem textilen Flächengebilde 28 bzw. der ringartigen Struktur 16 mit den Durchgangsöffnungen 22. Daher ist es möglich, durch die Ausgestaltung dieser Bereiche die beiden Funktionen unabhängig voneinander zu optimieren.In this example, the coffee powder 9 is set up to brew Café Crema, and in the described brewing process, a pressure in the range of, for example, about 7 bar to 13 bar is built up via the coffee machine in the portion capsule 1. Since the passage openings 22 are relatively small, thereby high flow velocities occur in the region of the through openings 22, and it comes to turbulence and foaming, as desired at Cafe Crema. By the construction of the Sieve device 6 so the functions as a filter device and as a crema image generator assigned to different areas, namely the textile fabric 28 and the ring-like structure 16 with the through holes 22. Therefore, it is possible to optimize the two functions independently by the design of these areas ,

In ähnlicher Weise kann Espresso aufgebrüht werden, wobei in diesem Fall das Kaffeepulver aus für Espresso üblichen Kaffeebohnen gemahlen ist. Ferner ist in der Regel der zum Brühen verwendete Druck höher und liegt z.B. im Bereich von 9 bar bis 18 bar. Auch bei Espresso ist eine Crema-Bildung erwünscht.Similarly, espresso may be brewed, in which case the coffee powder is ground from coffee beans common for espresso. Furthermore, the pressure used for scalding is usually higher, being e.g. in the range of 9 bar to 18 bar. Even with espresso, a crema formation is desired.

In Figur 6 ist eine weitere Ausführungsform einer Siebeinrichtung, hier mit 6' bezeichnet, im Längsschnitt gezeigt. Die Siebeinrichtung 6' hat wiederum eine Tragstruktur 40 mit einem Verstärkungsrand 42 und an ihrer Unterseite eine ringartige Struktur 44 mit Durchgangsöffnungen 45. Im Gegensatz zu der Siebeinrichtung 6 wird die Filterfunktion jedoch nicht mittels eines textilen Flächengebildes 28 erreicht, sondern durch eine Vielzahl von Löchern 46, die in der Tragstruktur 40 vorgesehen sind. Im Ausführungsbeispiel ist die Siebeinrichtung 6' bzw. die Tragstruktur 40 mit der ringartigen Struktur 44 einstückig als Spritzgussteil hergestellt.FIG. 6 shows a further embodiment of a screening device, designated here by 6 ', in longitudinal section. The screening device 6 'in turn has a support structure 40 with a reinforcing edge 42 and on its underside an annular structure 44 with through holes 45. In contrast to the screening device 6, the filter function is not achieved by means of a textile fabric 28, but by a plurality of holes 46th provided in the support structure 40. In the exemplary embodiment, the sieve device 6 'or the support structure 40 with the ring-like structure 44 is produced in one piece as an injection-molded part.

Die Figuren 7 und 8 zeigen eine Variante der Siebeinrichtung aus Figur 6, hier mit 6" bezeichnet. Einander entsprechende Teile sind mit den gleichen Bezugszeichen versehen wie in Figur 6. Bei der Ausführungsform gemäß den Figuren 7 und 8 sind die Löcher 46 jedoch in ringförmigen Zonen angeordnet, zwischen denen sich nach unten vorragende Vorsprünge 48 befinden. In der Ausschnittsvergrößerung gemäß Figur 8 sind zu den einzelnen Vorsprüngen 48 die jeweiligen Achsen als gestrichelte Linien eingezeichnet. Die Vorsprünge 48 sorgen für einen gleichmäßigen Abstand zwischen dem Kapselboden und der Siebeinrichtung 6", sodass zwischen der Siebeinrichtung 6" und dem Kapselboden ein wohldefinierter Außenbereich des Zwischenraums ausgebildet ist und das extrahierte Getränk ungehindert durch die Löcher 46 fließen kann. Im Ausführungsbeispiel ist die Siebeinrichtung 6" mit der ringartigen Struktur 44 wiederum einstückig als Spritzteil aus einem lebensmitteltauglichen Kunststoff hergestellt.Figures 7 and 8 show a variant of the sieve device of Figure 6, here denoted by 6 ". Corresponding parts are given the same reference numerals as in Figure 6. In the embodiment according to Figures 7 and 8, however, the holes 46 are annular 8, the respective axes are shown as dashed lines to the individual projections 48. The projections 48 ensure a uniform spacing between the capsule bottom and the screening device 6 ", so that a well-defined outer region of the intermediate space is formed between the sieve device 6" and the capsule bottom and the extracted beverage can flow unhindered through the holes 46. In the exemplary embodiment, the screening device 6 "is in turn made in one piece with the ring-like structure 44 as a molded part made of a food-grade plastic.

In Figur 9 ist eine weitere Ausführungsform einer Portionskapsel, hier mit 1' bezeichnet, im Längsschnitt veranschaulicht. Die Portionskapsel 1' ist ähnlich aufgebaut wie die Portionskapsel 1 aus Figur 1, weshalb einander entsprechende Teile mit denselben Bezugszeichen versehen sind.FIG. 9 illustrates a further embodiment of a portion capsule, designated here by 1 ', in longitudinal section. The portion capsule 1 'is similar to the portion capsule 1 of Figure 1, which is why corresponding parts are provided with the same reference numerals.

Bei der Portionskapsel 1' hat jedoch die an der Unterseite der Siebeinrichtung 6"' ausgebildete ringartige Struktur 16' eine größere Höhe als die ringartige Struktur 16, und es sind breitere Durchgangsöffnungen 22' vorgesehen. Die Durchgangsöffnungen 22' haben also einen größeren Durchtrittsquerschnitt als die Durchgangsöffnungen 22 aus der Ausführungsform gemäß Figur 1.However, in the portion capsule 1 ', the ring-like structure 16' formed on the underside of the screen 6 '' has a greater height than the ring-like structure 16, and wider through-holes 22 'are provided Through openings 22 from the embodiment according to FIG. 1.

Ferner hat der Kapselboden 3' in seinem mittleren Bereich eine Öffnung 50, die mit einem von unten aufgeklebten Folienstück 52 aus z.B. Aluminiumfolie verschlossen ist. Alternativ könnte das Folienstück auch von oben aufgelegt sein. Das Folienstück 52 bildet eine Sollschwachstelle, da es z.B. mittels eines Dorns leichter durchdrungen werden kann als das übrige Material des Kapselbodens 3'.Furthermore, the capsule bottom 3 'has in its middle region an opening 50, which is provided with a piece of film 52 adhered from below, made of e.g. Aluminum foil is closed. Alternatively, the piece of film could also be launched from above. The film piece 52 forms a target weak point because it is e.g. can be penetrated by a mandrel easier than the rest of the material of the capsule bottom 3 '.

Die Portionskapsel 1' ist mit einem Kaffeepulver 9' gefüllt, das zum Brühen von Filterkaffee geeignet ist. Wenn die Portionskapsel 1' in eine Kaffeemaschine der im Zusammenhang mit dem Ausführungsbeispiel gemäß Figur 1 erläuterten Art eingesetzt wird, durchstößt der untere Dorn das Folienstück 52 bereits, wenn der Kapselhalter verriegelt wird. Zum Brühen von Filterkaffee wird ein relativ niedriger Wasserdruck benutzt, z.B. 1 bar bis 7 bar. Nachdem der extrahierte Kaffee das als Filter dienende textile Flächengebilde 28 der Siebeinrichtung 6"' durchdrungen hat, gelangt er in den Zwischenraum 18 und durch die großen Durchgangsöffnungen 22' zu der Perforationsöffnung in dem Folienstück 52 und dem eingedrungenen Dorn, der als Auslauf dient. Wegen des relativ geringen Drucks und der relativ großen Durchgangsöffnungen 22' kommt es nicht zu einer Crema-Bildung. Der fertig gebrühte Filterkaffee tritt also praktisch ohne Crema aus der Kaffeemaschine aus, wie es z.B. in Deutschland gewünscht ist.The portion capsule 1 'is filled with a coffee powder 9', which is suitable for brewing filter coffee. If the portion capsule 1 'is inserted into a coffee machine of the type explained in connection with the exemplary embodiment according to FIG. 1, the lower mandrel already punctures the piece of film 52, when the capsule holder is locked. For brewing filter coffee, a relatively low water pressure is used, eg 1 bar to 7 bar. After the extracted coffee has penetrated the filter fabric 27 of the screen 6 ", it passes into the space 18 and through the large passage openings 22 'to the perforation opening in the film piece 52 and the penetrated mandrel which serves as an outlet The relatively low pressure and the relatively large passage openings 22 'do not produce any crema, so the finished brewed filter coffee emerges from the coffee machine with virtually no cream, as is desired, for example, in Germany.

Claims (17)

Portionskapsel, - mit einem Kapseldeckel (2) und einem Kapselboden (3; 3'), die im Lieferzustand allseitig geschlossen ist und eine partikelförmige, mittels Wasser extrahierbare Getränkesubstanz (9; 9') enthält, wobei zwischen Getränkesubstanz (9; 9') und Kapselboden (3; 3') eine Siebeinrichtung (6; 6'; 6"; 6"') angeordnet ist, - dadurch gekennzeichnet, dass die Siebeinrichtung (6; 6'; 6"; 6"') im zentralen Bereich des Kapselbodens (3; 3') mittels einer ringartigen Struktur (16; 16'; 44) auf Abstand zum Kapselboden (3; 3') gehalten ist, durch die in dem Zwischenraum (18) zwischen Siebeinrichtung (6; 6'; 6"; 6"') und Kapselboden (3; 3') ein Außenbereich (20) und ein Innenbereich (21) definiert ist, wobei der Außenbereich (20) über Durchgangsöffnungen (22; 22'; 45) mit dem Innenbereich (21) in Verbindung steht. Portion capsule - With a capsule lid (2) and a capsule bottom (3, 3 '), which is closed on all sides in the delivery state and contains a particulate, extractable by water beverage substance (9, 9'), wherein between beverage substance (9, 9 ') and capsule bottom (3; 3 ') a screening device (6; 6'; 6 ";6"') is arranged, - characterized in that the screening device (6, 6 ', 6 ", 6"') in the central region of the capsule bottom (3, 3 ') by means of an annular structure (16, 16', 44) at a distance from the capsule bottom (3; 3 '), by means of which an outer region (20) and an inner region (21) are defined in the intermediate space (18) between the sieve device (6; 6'; 6 ";6"') and capsule bottom (3; 3') , wherein the outer region (20) via passage openings (22; 22 '; 45) with the inner region (21) is in communication. Portionskapsel nach Anspruch 1, dadurch gekennzeichnet, dass die Getränkesubstanz gemahlenen Kaffee (9) aufweist und dass die Durchgangsöffnungen (22; 45) relativ klein und zur Ausbildung einer Crema eingerichtet sind.Portion capsule according to claim 1, characterized in that the beverage substance comprises ground coffee (9) and that the passage openings (22; 45) are relatively small and designed to form a crema. Portionskapsel nach Anspruch 1, dadurch gekennzeichnet, dass die Getränkesubstanz gemahlenen Kaffee (9') aufweist und dass die Durchgangsöffnungen (22') relativ groß sind.Portion capsule according to claim 1, characterized in that the beverage substance has ground coffee (9 ') and that the passage openings (22') are relatively large. Portionskapsel nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Siebeinrichtung (6; 6'; 6"; 6"') eine Tragstruktur (10; 40) aufweist.Portion capsule according to one of Claims 1 to 3, characterized in that the sieve device (6; 6 '; 6 ";6"') has a carrying structure (10; 40). Portionskapsel nach Anspruch 4, dadurch gekennzeichnet, dass die ringartige Struktur (16; 16'; 44) integral mit der Tragstruktur (10; 40) ausgebildet ist, vorzugsweise als Spritzteil.Portion capsule according to claim 4, characterized in that the annular structure (16; 16 '; 44) is integral with the support structure (10; 40) is formed, preferably as a molded part. Portionskapsel nach Anspruch 4 oder 5, dadurch gekennzeichnet, dass die Tragstruktur (40) mindestens einen Abstandshalter (48) aufweist, der außerhalb des zentralen Bereichs des Kapselbodens am Kapselboden anliegt, wobei der Abstandshalter vorzugsweise als Vorsprung (48) ausgebildet ist.Portion capsule according to claim 4 or 5, characterized in that the support structure (40) has at least one spacer (48) which rests outside the central region of the capsule bottom on the capsule bottom, wherein the spacer is preferably formed as a projection (48). Portionskapsel nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, dass die Tragstruktur (10) mit mindestens einer Aussparung (24) versehen ist, die mit einem textilen Flächengebilde (28) überdeckt ist.Portion capsule according to one of claims 4 to 6, characterized in that the support structure (10) is provided with at least one recess (24) which is covered with a textile fabric (28). Portionskapsel nach einem der Ansprüche 4 bis 7, dadurch gekennzeichnet, dass die Siebeinrichtung (6'; 6") ein Lochsieb aufweist, das vorzugsweise einstückig mit der Tragstruktur (40) ausgebildet ist.Portion capsule according to one of claims 4 to 7, characterized in that the screening device (6 ', 6 ") has a perforated screen, which is preferably formed integrally with the support structure (40). Portionskapsel nach einem der Ansprüche 4 bis 8, dadurch gekennzeichnet, dass die Tragstruktur (10; 40) in ihrem zentralen Bereich eine Ausstülpung (14) aufweist, die von der ringartigen Struktur (16; 16'; 44) weg gerichtet und zur Aufnahme eines Dorns an einer auf die Portionskapsel (1; 1') abgestimmten Kaffeemaschine eingerichtet ist.Portion capsule according to one of claims 4 to 8, characterized in that the support structure (10; 40) has in its central region a protuberance (14) directed away from the ring-like structure (16; 16 '; 44) and for receiving a Dorns on a on the portion capsule (1, 1 ') tuned coffee maker is set up. Portionskapsel nach einem der Ansprüche 4 bis 9, dadurch gekennzeichnet, dass die Tragstruktur (10; 40) an ihrer Peripherie einen Verstärkungsrand (12; 42) aufweist.Portion capsule according to one of claims 4 to 9, characterized in that the support structure (10; 40) has on its periphery a reinforcing edge (12; 42). Portionskapsel nach einem der Ansprüche 1 bis 10, gekennzeichnet durch eine Verteilereinrichtung (8; 8'), die zwischen dem Kapseldeckel (2) und der Getränkesubstanz (9; 9') angeordnet ist.Portion capsule according to one of Claims 1 to 10, characterized by a distributor device (8; 8 ') which is arranged between the capsule lid (2) and the beverage substance (9; 9'). Portionskapsel nach Anspruch 11, dadurch gekennzeichnet, dass die Verteilereinrichtung (8') eine Platte mit Durchbrechungen (38) aufweist.Portion capsule according to claim 11, characterized in that the distributor device (8 ') has a plate with openings (38). Portionskapsel nach Anspruch 12, dadurch gekennzeichnet, dass die Durchbrechungen als radial verlaufende Schlitze (38) und/oder als Löcher ausgestaltet sind.Portion capsule according to claim 12, characterized in that the openings are configured as radially extending slots (38) and / or as holes. Portionskapsel nach einem der Ansprüche 11 bis 13, dadurch gekennzeichnet, dass die Verteilereinrichtung (8; 8') in ihrem zentralen Bereich eine Ausstülpung (34) aufweist, die von dem Kapseldeckel (2) weg gerichtet und zur Aufnahme eines Dorns an einer auf die Portionskapsel (1; 1') abgestimmten Kaffeemaschine eingerichtet ist.Portion capsule according to one of claims 11 to 13, characterized in that the distributor device (8; 8 ') has in its central region a protuberance (34) directed away from the capsule lid (2) and for receiving a mandrel at one on the Portion capsule (1; 1 ') tuned coffee maker is set up. Portionskapsel nach einem der Ansprüche 1 bis 14, dadurch gekennzeichnet, dass der Kapselboden (3') in seinem zentralen Bereich eine Sollschwachstelle (52) aufweist.Portion capsule according to one of claims 1 to 14, characterized in that the capsule bottom (3 ') has a predetermined weak point (52) in its central region. Portionskapsel nach Anspruch 15, dadurch gekennzeichnet, dass die Sollschwachstelle ein Folienstück (52) aufweist, das schwächer ist als der Kapselboden (3') in der Umgebung des Folienstücks (52).Portion capsule according to claim 15, characterized in that the desired weak point has a film piece (52) which is weaker than the capsule bottom (3 ') in the vicinity of the film piece (52). Portionskapsel nach einem der Ansprüche 1 bis 16, dadurch gekennzeichnet, dass die Höhe der ringartigen Struktur (16; 16'; 44) weniger als 20%, vorzugsweise weniger als 10%, der Höhe der Portionskapsel (1; 1') beträgt.Portion capsule according to one of claims 1 to 16, characterized in that the height of the ring-like structure (16; 16 '; 44) is less than 20%, preferably less than 10%, of the height of the portion capsule (1; 1').
EP06020762A 2005-12-02 2006-10-02 Single portion cartridge Not-in-force EP1792850B1 (en)

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US20070148290A1 (en) 2007-06-28
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EP1792850B1 (en) 2008-11-26
ATE415363T1 (en) 2008-12-15
DE502006002186D1 (en) 2009-01-08
ES2318642T3 (en) 2009-05-01
DE102005058336A1 (en) 2007-06-06
PL1792850T3 (en) 2009-05-29

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