Containers for beverage preparation

Abstract

The invention relates to a coffee layer structure and a container for beverage preparation. According to one of the containers, the container comprises a compartment (91) for containing ground coffee particles (1, 2) to be extracted, wherein the compartment (91) is adapted to be penetrated by a pressurized water flow from an injection wall (89) of the container towards a distribution wall (92) of the container for preparing a beverage from the coffee particles (1, 2), wherein the coffee particles (1, 2) comprise: a first group of first coffee particles (1) having a first volume moment average value D[4, 3] and a second group of second coffee particles (2), the first group of first coffee particles having a first volume moment average value D[4, 3] and the second group of second coffee particles having a second volume moment average value D[4, 3] and being arranged downstream of the first group of first coffee particles (1), wherein the second group of second coffee particles (2) is in direct contact with the distribution wall (92), wherein the second volume moment average value is greater than the first volume moment average value.

Description

Technical Field

[0001] The present invention relates to a coffee bed structure and a container. According to the present invention, the "container" may be a "capsule" (e.g., a capsule as described in EP1808382 B1; Figure 1 The container is any one of the group consisting of a capsule similar to the one described in EP 1808382 B1), a "cartridge" (e.g. a cartridge as described in EP 3265404 A1), a "pad" (e.g. made entirely or partly of filter paper), a "pod" (e.g. a soft or flexible pod), a cup, a tray or a container as described in EP 18210108.9. Background Art

[0002] In coffee systems that prepare beverages from ground coffee particles by extraction, it is generally preferred to use smaller-sized coffee particles. The reason for this is that smaller-sized coffee particles provide a (total) higher surface area and thus increase yield. In other words, the higher surface area of ​​the coffee particles in contact with the water results in more interaction between the ground coffee and the water, thereby extracting more solids and flavors from the ground coffee.

[0003] However, smaller coffee particles lead to high pressure and blockages in the container. This is because the layer of small coffee particles comes into direct contact with the dispensing wall of the container and accumulates on it. The dispensing wall is usually the part of the container through which the injected water and the beverage extracted from the ground coffee particles leave the container, for example to be subsequently dispensed into a cup. For example, the dispensing wall can be a diaphragm. Due to the small size of the coffee particles, the accumulation of coffee particles on the dispensing wall will prevent the water from flowing properly through the dispensing wall, for example to the (bottom) diaphragm or filter of the container, thus leading to blockage of the capsule and high pressure. The blockage occurs because the resistance generated by the accumulated coffee particles (container or capsule resistance) reaches the maximum pressure that the coffee machine can pump out (the static head of the machine). Typically, the machine's pump cannot deliver pressures higher than 12 to 16 bar. The average pressure required to open and deliver the (coffee) beverage is about 9 to 12 bar.

[0004] Such blockages in the container are disadvantageous because the beverage cannot be properly delivered, and because the machine may become defective or even malfunction, or leak from the container (pod) or the machine. In particular, small coffee particles and the resulting blockages can lead to long flow times for the coffee beverage or even prevent the coffee beverage from flowing out of the container. This can result in very long flow times / beverage preparation times, particularly in systems equipped with a bypass valve exceeding a certain pressure (e.g., 9 to 10 bar). However, as mentioned above, small coffee particles are preferred to increase production yields.

[0005] One object of the present invention is therefore to provide a coffee bed structure and a container which overcome the above-mentioned drawbacks, ie which do not affect in particular clogging of the container but increase the yield of coffee extraction.

[0006] These and other objects which become apparent after reading the following description are solved by the subject-matter of the independent claims.The dependent claims relate to preferred embodiments of the invention.

[0007] summary

[0008] According to a first aspect of the present invention, a coffee bed structure for beverage preparation includes a first layer of first ground coffee particles to be extracted having a first volume moment average value D[4,3], and a second layer of second ground coffee particles to be extracted having a second volume moment average value D[4,3]. The coffee bed structure is adapted to be passed through by a pressurized water flow for preparing a beverage from the coffee particles. The first layer of first ground coffee particles is layered over the second layer of second ground coffee particles, wherein the second volume moment average value is greater than the first volume moment average value.

[0009] According to a second aspect of the present invention, a container for preparing a beverage comprises a compartment for containing ground coffee particles to be extracted, wherein the compartment is adapted to be penetrated by a pressurized flow of water from an injection wall of the container towards a dispensing wall of the container for preparing a beverage from the coffee particles. The coffee particles comprise: a first group of first coffee particles having a first volume moment mean value D[4, 3] and a second group of second coffee particles having a second volume moment mean value D[4, 3] and arranged downstream of the first group of first coffee particles, wherein the second group of second coffee particles is in direct contact with the dispensing wall, and wherein the second volume moment mean value is greater than the first volume moment mean value.

[0010] According to a third aspect of the present invention, a container for preparing a beverage comprises a compartment for accommodating ground coffee particles to be extracted, wherein the compartment is adapted to be passed through by a pressurized water flow from an injection wall of the container toward a distribution wall of the container for preparing a beverage from the coffee particles. The coffee particles are arranged at a total height within the compartment. The coffee particles arranged from the distribution wall to a first height are second coffee particles having a second volume moment average value D[4,3], wherein the coffee particles arranged at a second height extending from the first height to the total height of the coffee particles are first coffee particles having a first volume moment average value D[4,3]. The second volume moment average value is greater than the first volume moment average value.

[0011] According to a fourth aspect of the present invention, a container for preparing a beverage comprises a compartment for containing ground coffee particles to be extracted, wherein the compartment is adapted to be penetrated by a pressurized water flow from an injection wall of the container toward a dispensing wall of the container, for preparing a beverage from the coffee particles. The coffee particles in direct contact with the dispensing wall are second coffee particles having a second volume moment average value D[4,3], and the coffee particles arranged upstream of the second coffee particles are first coffee particles having a first volume moment average value D[4,3]. The second volume moment average value is greater than the first volume moment average value.

[0012] According to a fifth aspect of the present invention, there is provided a container for beverage preparation by a method comprising the steps of:

[0013] - providing a container having a compartment for containing coffee particles to be extracted, the coffee particles comprising a first group of first coffee particles having a first volume moment mean value D[4,3] and a second group of second coffee particles having a second volume moment mean value D[4,3], wherein the compartment is suitable for being traversed by a pressurized flow of water from an injection wall of the container towards a dispensing wall of the container for preparing a beverage from the coffee particles,

[0014] - providing the second group of second coffee particles in the compartment such that the second group of second coffee particles is in direct contact with the dispensing wall, and

[0015] - layering the first group of first coffee particles on the second group of second coffee particles such that the second group of second coffee particles is arranged downstream of the first group of first coffee particles,

[0016] The second volume moment average value is greater than the first volume moment average value.

[0017] The "volume moment mean", also called the "mass moment mean" or "De Brouckere mean diameter" and similar to the moment of inertia, is calculated as follows:

[0018]

[0019] For example, the value can be calculated / measured using laser diffraction or light scattering. Exemplary machines for measuring the volume moment average by light scattering or laser diffraction are, for example, from Malvern Instruments. For example, there is a machine (or device) known as the Malvern Particle Size Analyzer 3000 (https: / / www.malvernpanalytical.com / en / products / product-range / mastersizer-range / mastersizer-3000), which is particularly suitable for measuring the volume moment average. In order to separate particles for measurement, a dry dispersion method or dry disperser called "Aero S" from Malvern Instruments (https: / / www.malvernpanalytical.com / en / products / product-range / mastersizer-range / mastersizer-3000 / accessories / aero-s / ) can be used. For information on particle size analysis and particle size measurements, such as volume moment averages, see the following technical literature: RAWLE, Alan, “Basic Principles of Particle Size Analysis,” retrieved from https: / / www.researchgate.net / profile / Ioan_Tanu / post / What_is_the_meaning_of_D4_3_and_D0_5_values_in_grain_size_analysis_and_how_is_it_calculated / attachment / 59d63265c49f478072ea189a / AS%3A273632960417813%401442250590500 / download / Basic_principles_of_particle_size_analysis_MRK034.pdf.

[0020] In other words, the present invention proposes to provide coffee particles of larger size, i.e. coffee particles with a second mean volume moment, which are in direct contact with the dispensing wall, for example on the bottom of the container, so that coffee particles of smaller size, i.e. coffee particles with a first mean volume moment, cannot come into direct contact with the dispensing wall. However, the coffee particles with the second mean volume moment allow water to flow between these coffee particles so that water and therefore the beverage can reach the dispensing wall and leave the container via the dispensing wall. Therefore, the coffee particles with the second mean volume moment prevent or at least reduce clogging of the container due to accumulation of the first coffee particles on the dispensing wall. At the same time, the yield of coffee extraction is improved due to the extraction of the beverage leaving the container via the dispensing wall from the coffee particles with the second mean volume moment and from the coffee particles with the first mean volume moment, the first mean volume moment being smaller than the second mean volume moment and therefore achieving a higher (total) surface area for a given total volume than the coffee particles with the second mean volume moment.

[0021] The second mean volume moment value may be equal to or greater than 350 μm, preferably equal to or greater than 400 μm, 450 μm, 500 μm, 550 μm, 600 μm, 650 μm, or 700 μm. These values ​​for the second mean volume moment value effectively prevent coffee particles having the first mean volume moment value from coming into direct contact with and accumulating on the dispensing wall. Thus, clogging of the container is effectively prevented or at least significantly reduced.

[0022] The second volume moment mean value may be equal to or less than 900 μm, preferably equal to or less than 850 μm or 800 μm or 750 μm or 700 μm or 650 μm or 600 μm. These values ​​of the second volume moment mean value particularly prevent or at least significantly reduce clogging, while still ensuring a high yield of coffee extracted from coffee particles having the second volume moment mean value.

[0023] The second volume moment average value may be at least 15% or at least 20% or at least 30% greater than the first volume moment average value.Thus, clogging of the container is effectively prevented or at least reduced, while in particular improving the yield of coffee extraction.

[0024] Preferably, the first coffee particles having a first volume moment have a first volume, while the second coffee particles having a second volume moment have a second volume. The ratio of the first volume to the second volume is in the range of 1:1 to 20:1, preferably in the range of 10:1 to 20:1. Thus, the first volume provides a total surface area of ​​the coffee particles that is greater than the total surface area of ​​the coffee particles of the second volume, thereby improving the yield of coffee extraction and effectively preventing or at least significantly reducing clogging of the container.

[0025] The first coffee particles can be layered on the second coffee particles and / or the first coffee particles can be in direct contact with the second coffee particles.Thus, the first coffee particles and the second coffee particles can be easily provided in the container, for example by simply filling the container with the corresponding coffee particles.

[0026] The second coffee particles can be arranged so that the water used to prepare the beverage can only leave the container via the second coffee particles. This ensures that the water flowing between the first coffee particles used to extract the coffee always flows between the second coffee particles before reaching the dispensing wall. This effectively prevents or at least reduces clogging of the container while ensuring a high yield of extracted coffee.

[0027] The second coffee particles may be layered on the dispensing wall and / or the first coffee particles and / or the second coffee particles may be arranged as a coffee bed and / or the second coffee particles may cover the entire dispensing wall.

[0028] The second coffee particles can be arranged, in particular stacked, in the container at a height, preferably the (previously mentioned) first height, from the dispensing wall to the first coffee particles, wherein this height is preferably equal to or greater than 1000 μm, more preferably equal to or greater than 1500 μm or 2000 μm or 2500 μm or 3000 μm or 3500 μm or 4000 μm or 4500 μm or 5000 μm. This height is preferably measured along a line that is substantially perpendicular to the dispensing wall and / or parallel to an axis of the container, for example an axis of symmetry of the container. These heights of the second coffee particles particularly reliably prevent the first coffee particles from coming into direct contact with the dispensing wall, because, according to these heights, the first coffee particles must travel a relatively long distance between the second coffee particles before they can come into direct contact with the dispensing wall.

[0029] Preferably, the ratio of the height to the second volume moment mean is at least 2: 1 or at least 5: 1 or at least 9: 1. For example, second coffee particles (e.g. a layer of second coffee particles) may have a height of 5 mm and a second volume moment mean of 600 μm, wherein, for example, first coffee particles (e.g. a layer of first coffee particles) may have a height of 15 mm and a first volume moment mean of 330 μm.

[0030] The first coffee particles can be arranged, in particular stacked, in the container at a further height (preferably the (above-mentioned) second height) from the second coffee particles (preferably the first height) to the total height of the coffee particles. For example, the further height can be equal to or greater than 5000 μm or 6000 μm or 7000 μm or 8000 μm or 9000 μm or 10000 μm or 11000 μm or 12000 μm or 13000 μm or 14000 μm or 15000 μm or 16000 μm or 17000 μm. The further height is preferably measured along a line that is substantially perpendicular to the dispensing wall and / or parallel to the axis of the container, for example the axis of symmetry of the container. The further height in particular defines the amount of first coffee particles and therefore the total surface area of ​​the first coffee particles. Therefore, according to these ranges for the further height, a particularly good yield of coffee extraction can be achieved.

[0031] In order to prevent the container from clogging particularly well while still improving the yield of coffee extraction, the ratio of this height to the other height is, for example, preferably in the range of 1:1 to 1:20, more preferably in the range of 1:10 to 1:20 or 1:1 to 1:15, even more preferably in the range of 1:2 to 1:5, for example in the range of 1:3 to 1:4.

[0032] The container may be adapted to retain the coffee particles in a predetermined manner, preferably with the first coffee particles and / or the second coffee particles at a respective first height and second height. For example, the compartment comprises a retaining structure designed to retain the coffee particles in a predetermined manner. Additionally or alternatively, the coffee particles may be compactly arranged in the compartment, which enables the first coffee particles and / or the second coffee particles to be retained in a predetermined manner. That is, the compactness enables a resultant force acting between the coffee particles and on the compartment, thereby retaining the first coffee particles and / or the second coffee particles in a predetermined manner, in particular during handling and transport of the container. As a result, during handling and transport of the container, no coffee particles from the first coffee particles or at least only a small amount of the first coffee particles migrate between the second coffee particles.

[0033] The retaining structure may be formed integrally with the compartment. For example, the retaining structure is a protrusion or recess of the compartment, which preferably (circumferentially) surrounds the first coffee particles and / or the second coffee particles. Alternatively, the retaining structure may be provided separately relative to the compartment.

[0034] The compartment may comprise at least a portion of the injection wall and / or at least a portion of the dispensing wall and / or a side wall surrounding the coffee particles, wherein the injection wall and / or the dispensing wall and / or the side wall are preferably in direct contact with the coffee particles. The injection wall and / or the dispensing wall and / or the side wall preferably comprise a retaining structure and / or wherein, preferably, the retaining structure is formed integrally with the injection wall and / or the dispensing wall and / or the side wall or is provided separately.

[0035] The first volume moment average value may be less than 550 μm, preferably equal to or less than 500 μm or 450 μm or 400 μm or 380 μm or 350 μm or 300 μm or 250 μm or 200 μm or 150 μm or 100 μm. These volume moment average values ​​(and preferably also the volume moment average values ​​of the second coffee particles) can be achieved by using a suitable grinder (e.g. a roller grinder) and / or a suitable (physical) sieve. These volume moment average values ​​achieve a high surface area of ​​the first coffee particles for a high yield of coffee extraction, while still being large enough to prevent the first coffee particles from flowing between the second coffee particles to come into direct contact with the dispensing wall and cause a blockage.

[0036] The dispensing wall may comprise a filter for preventing at least the second coffee particles from passing through the dispensing wall. In particular, the filter may be provided integrally with the dispensing wall or separately relative to the dispensing wall, and / or the filter may be provided downstream or upstream of the dispensing wall.

[0037] The dispensing wall may include or be arranged to include orifices. The orifices may be orifices (or holes or small (filtering) openings) of the aforementioned filter used to provide the filter function, or they may be orifices of a mesh (e.g., the mesh of the aforementioned filter) used to provide the filtering function. For another example, an opening device (provided with the container or separately from the container) may engage with the dispensing wall to provide the orifices. Each orifice is smaller than the second volume moment average, thereby preventing second coffee particles from passing through the orifice and, therefore, the dispensing wall, but allowing the beverage to flow through the orifice. Preferably, the diameter of each orifice (which may be defined by the mesh size if the dispensing wall is a mesh or filter) or the maximum possible distance between two points of the contour of each orifice is smaller than the second volume moment average, preferably at least 10%, 20%, 30%, 40%, or 50% smaller than the second volume moment average. In particular, in the example where the flow area of ​​each orifice is circular, the corresponding orifice has a certain diameter. In general, each orifice is not limited to a specific contour. The corresponding contour, i.e., the contour of the corresponding flow area, may be circular, elliptical, rectangular, polygonal, or the like. In the example where the contour is circular, the maximum possible distance between two points of the contour is the diameter of the orifice. For example, the diameter of each orifice or the maximum possible distance, i.e., the opening size of the orifice, is equal to or less than 400 μm, preferably equal to or less than 350 μm, and / or equal to or greater than 200 μm, preferably equal to or greater than 250 μm.

[0038] A sixth aspect of the present invention is the use of a container as described above in a beverage preparation machine for preparing a beverage. The beverage preparation machine comprises, for example, at least one water source (e.g., a water connection (directly or indirectly) connected to another water source (e.g., an external water source) and / or a refillable water tank or water jug), and a pump for providing a pressurized water flow for preparing a beverage from coffee particles by extraction. The beverage preparation machine may further comprise a heater, such as a heating block, for heating water in the water tank to be poured into the container. The beverage preparation machine may be an extraction machine.

[0039] A method for producing a container for beverage preparation (e.g., a container as described above), the method comprising the steps of:

[0040] - providing a capsule having a compartment for containing coffee particles to be extracted, the coffee particles comprising a first group of first coffee particles having a first volume moment mean value D[4,3] and a second group of coffee particles having a second volume moment mean value D[4,3], wherein the compartment is suitable for being traversed by a pressurized flow of water from an injection wall of the capsule towards a dispensing wall of the capsule for preparing a beverage from the coffee particles,

[0041] - providing the second group of coffee particles in the compartment such that the second group of coffee particles is in direct contact with the dispensing wall, and

[0042] - layering the first group of coffee particles on the second group of coffee particles such that the second group of coffee particles is arranged downstream of the first group of coffee particles,

[0043] The second volume moment average value is greater than the first volume moment average value.

[0044] The coffee particles contained in the compartment may be present in an amount, for example, sufficient to prepare one, two, or more cups of coffee beverage. The amount may preferably be between 4 g and 30 g. The amount of the first coffee particles may be, for example, between 4 g and 10 g, and / or the amount of the second coffee particles may be, for example, between 0.5 g and 5 g. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Hereinafter, the present invention is exemplarily described with reference to the accompanying drawings, in which:

[0046] Figure 1 is a schematic perspective view of a container according to a preferred embodiment of the present invention;

[0047] Figure 2 is based on Figure 1 a schematic cross-sectional detail of a container having a coffee bed structure that does not include second coffee particles; and

[0048] Figure 3 The coffee layer structure according to the preferred embodiment of the present invention is Figure 1 Schematic cross-sectional detail of a container.

[0049] Specific implementation methods of the implementation plan

[0050] Figure 1 is a schematic perspective view of a container according to a preferred embodiment. Figure 1 The container shown may be a capsule. However, the present invention is not limited to a specific container, as long as the container is suitable for preparing a pressurized beverage, such as a coffee beverage (e.g., espresso), which is prepared, for example, by pressurized extraction of coffee. The container may be a container that can be inserted into a machine. The container may be a package containing a substance for preparing a beverage (i.e., coffee particles as described below), wherein the package preferably surrounds the substance on all sides. The container may contain the substance in an aroma-proof manner. The container may be a capsule (e.g., as described in EP 1808382 B1; Figure 1 The container is a capsule similar to the one described in EP 1808382 B1), a cartridge (e.g. a cartridge as described in EP 3265404 A1), a (coffee) pad (e.g. made entirely or partially of filter paper), a (coffee) pod (e.g. a soft or flexible pod), a cup, a tray or a container as described in EP 18210108.9. The container may be fully flexible or at least partially flexible, i.e. semi-rigid.

[0051] like Figure 1 As shown exemplarily in FIG, the container comprises a compartment 91 which contains ground coffee particles to be extracted, i.e. roasted ground coffee particles (R&G coffee). The coffee particles may further contain (edible) additives, in particular additives that have an impact on the flavor of the beverage, such as insoluble (chicory, cinnamon pieces, etc.) and / or soluble ingredients (sugar, soluble coffee, milk powder, etc.), instant coffee, concentrated syrup, concentrated fruit juice, chocolate products, milk-based products or any other dehydrated edible substances. The additives may be mixed (substantially uniformly) with the coffee particles. The coffee particles may be in powder form. For the sake of clarity, Figure 1 The coffee particles are not shown in FIG. Compartment 91 may include sidewalls 88 surrounding the coffee particles. Compartment 91 may include a bottom and a top. Sidewalls 88 may extend from the bottom to the top of compartment 91. However, this is not required. For example, the compartment may include only one wall, such as a single piece, which preferably surrounds the coffee particles on all sides. Alternatively, the compartment may include only two walls, such as only a top wall and a bottom wall.

[0052] Figure 1The compartment 91 shown in has a substantially cylindrical or conical form, particularly a truncated cone form. Compartment 91 can generally have a dome form, such as a form that widens or tapers from distribution wall 92 to injection wall 89 (described further below), or can have different forms. For example, compartment 91 can have a prismatic form, a truncated pyramid form or a substantially flat form, such as a disc-shaped form. In the top view of compartment 91, compartment 91 can have a circular, oval, angled (polygonal, rectangular, square, etc.) form.

[0053] The container can be a positionable or non-positionable container. A positionable container is understood to be a container that, due to its form, is automatically positioned and / or oriented in a machine so that the container can be used in the machine to prepare beverages. The sidewall 88 can be the outer wall of the container. For example, the sidewall 88 can be designed to position and / or orient the container in the machine so that the container can be used in the machine to prepare beverages. In order to properly position and / or orient the container in the machine, the sidewall 88 can have a specific form (e.g., an asymmetric form along a vertical and / or horizontal axis) and / or include specific structures, such as flanges.

[0054] Compartment 91 is adapted to be passed through by a pressurized water flow from the container's injection wall 89 toward the container's dispensing wall 92 for preparing a beverage from the coffee particles contained in compartment 91. The water is preferably hot or warm water and / or preferably has an elevated temperature, for example, in the range of 90°C to 100°C. However, the container is not limited to a particular form of coffee extraction, such as coffee extraction with hot water. For example, coffee extraction may also be coffee extraction performed with relatively cold water, also known as cold (coffee) extraction or cold (coffee) brewing. The cold water preferably has a temperature typically used for cold extraction or cold brewing, particularly approximately room temperature, for example, in the range of 16°C to 22°C, preferably in the range of 19°C to 21°C. In cold extraction, clogging and backpressure in the container are particularly challenging due to the viscosity of the water at the respective temperatures. However, as explained further below, the container of the present invention can effectively prevent or at least reduce such clogging and excessive backpressure.

[0055] Compartment 91 preferably includes at least a portion of, or the entirety of, an injection wall 89. Injection wall 89 preferably closes compartment 91 at its top; thus, injection wall 89 preferably serves as a lid for compartment 91. Injection wall 89 is adapted to allow water to be introduced into compartment 91 via injection wall 89. For example, injection wall 89 may be designed so that it can be pierced (by a needle or other piercing element) or otherwise torn to allow water to be introduced. Injection wall 89 may also be designed so that water can flow through it without piercing it, for example, by appropriately designing injection wall 89. Injection wall 89 is preferably a membrane or any other thin film. Injection wall 89 is not limited to a particular form or shape. For example, injection wall 89 may have a flat, scalloped, concave, and / or convex shape, particularly when compartment 91, and therefore injection wall 89, is not pressurized by water. The concave shape of injection wall 89 is preferably configured so that the concave side faces the interior of compartment 91. The convex form of the injection wall 89 is preferably arranged so that the convex side will face the interior of the compartment 91 .

[0056] Injection wall 89 can be fixedly attached to sidewall 88, particularly in a fluid-tight manner. For example, injection wall 89 is attached to sidewall 88 by welding, heat sealing or any other adhesive bonding. Injection wall 89 can be attached on the periphery of compartment 91 or sidewall 88, for example, weld along the periphery welding line 90 of compartment 91 or sidewall 88. Welding line 90 can be a flange extending from the upper end of the sidewall to the container exterior. In other examples, injection wall 89 also can be attached differently, for example, directly attached to distribution wall 92 without the need for sidewall 88.

[0057] Compartment 91 preferably includes at least a portion of, or the entirety of, a dispensing wall 92. Dispensing wall 92 preferably closes compartment 92 at its bottom. Thus, dispensing wall 92 holds coffee particles in compartment 92 at the bottom of compartment 92. Dispensing wall 92 can be fixedly attached to sidewall 88, particularly in a fluid-tight manner. For example, dispensing wall 92 can be attached to sidewall 88 by welding, heat sealing, or any other adhesive bonding. Dispensing wall 92 can be attached to the lower end of sidewall 88, for example, to a flange extending from the lower end. Dispensing wall 92 can also be attached (directly) to injection wall 89 without requiring sidewall 88. Dispensing wall 92 can be integrally formed with sidewall 88 or injection wall 89. Dispensing wall 92 is preferably arranged or adapted so that water can exit container and / or compartment 91 via dispensing wall 92, for example, so that it can subsequently be dispensed into a cup disposed downstream of dispensing wall 92. Dispensing wall 92 is preferably a thin film. Dispensing wall 92 is not limited to a particular form or shape. For example, the dispensing wall 92 may have a flat form, a shell form, a concave form and / or a convex form, in particular when the compartment 91 and therefore the dispensing wall 92 are not pressurized by the water flow. The concave form of the dispensing wall 92 is preferably arranged so that the concave side will face the interior of the compartment 91. The convex form of the dispensing wall 92 is preferably arranged so that the convex side will face the interior of the compartment 91. For example, the container can be designed so that it does not include further elements downstream of the dispensing wall 92, i.e., the water leaves the container via the dispensing wall 92.

[0058] Dispensing wall 92 can be arranged so that one or more elements (opening elements or devices) allow dispensing wall 92 to be opened so that water can flow through dispensing wall 92 and out of compartment 91. The one or more elements can be provided with the container (i.e., the container includes its own one or more (opening) elements, for example, housed in the container, preferably in compartment 91 or outside of compartment 91), or can be provided outside the container (i.e., the container and the one or more (opening) elements are separate from each other), for example as part of a machine in which the container is used. To provide the one or more elements with the container, the one or more elements can be provided at the bottom of the container and / or downstream of dispensing wall 92. Dispensing wall 92 can cover the one or more elements. For example, the opening of dispensing wall 92 via the one or more elements can be activated by the increased pressure of the water (or any other liquid or fluid) introduced into compartment 91, in particular during coffee extraction. The opening of dispensing wall 92 via the one or more elements can be achieved by the relative engagement between the one or more elements and dispensing wall 92. "Relative engagement" is understood to mean that the one or more elements or the dispensing wall 92, or alternatively both, can move relative to the other to open the dispensing wall 92. The relative engagement can pierce or tear the dispensing wall 92. Thus, the one or more elements can serve as one or more piercing or tearing elements.

[0059] exist Figure 1 In the preferred embodiment shown, the one or more elements include a raised element 93 in the form of a pyramid. The one or more elements may also include any other piercing element (tip, blade, knife, needle, etc.) or any other recessed or raised element, for example in the form of a cone, pyramid or any other geometric shape suitable for allowing the dispensing wall 92 to be opened. The raised element 93 is arranged at the bottom of the container. Therefore, the raised element 93 preferably forms the bottom of the container. The one or more elements may also include a recessed element 94, which preferably also forms the bottom of the container. The one or more elements, i.e. the raised element 93 and the recessed element 94, are covered by the dispensing wall 92. Therefore, water is introduced via the injection wall 89, and the increase in pressure will press the dispensing wall 92 against the one or more elements, so as to allow, for example, the dispensing wall 92 to be opened by tearing the dispensing wall 92, and thus the beverage can flow out of the container, for example, into a cup arranged below or downstream of the container.

[0060] The pressure of the water flow across the compartment 91 from the injection wall 89 to the dispensing wall 92 is sufficient to extract the coffee, i.e., to dissolve the soluble solids and spices from the ground coffee particles in the introduced water to prepare a beverage from these coffee particles. Preferably, the pressure of the water flow is also sufficient to press the dispensing wall 92 against the one or more elements in order to allow the dispensing wall 92 to open. This (extraction) pressure may be equal to or greater than 4 bar, or 6 bar, or 8 bar, or 10 bar, and / or equal to or less than 15 bar, or 14 bar, or 13 bar, or 12 bar, or 11 bar, or 10 bar. Preferably, this pressure is about 13 bar, for example in the range of 12 to 14 bar.

[0061] The dispensing wall 92 is adapted to prevent coffee particles from passing downstream of the dispensing wall 92, for example into a cup. Thus, the dispensing wall 92 comprises a filter, or is designed as a filter, or can be formed as a filter, for example by one or more elements. For example, and as in Figure 2 and Figure 3 As can be seen, the dispensing wall 92 includes (at least when dispensing a beverage from the container, such as when the one or more elements open the dispensing wall 92) a small opening or orifice 92a, such as a hole, which is smaller than the coffee particles to prevent the coffee particles from flowing downstream from the dispensing wall 92, but allows the beverage to flow through. Figure 2 and Figure 3 It is shown as an example Figure 1 Detailed view of one of the raised elements 93 which engage with the dispensing wall 92 so as to open the dispensing wall 92, thereby forming one of the small openings 92a and thus forming a filter. Figure 2 and Figure 3 The arrows in represent the pressure, and therefore the force, acting on the coffee particles due to the pressurized water, which can be used to engage the dispensing wall 92 with the raised element 93.

[0062] The filter can also be provided separately from the dispensing wall 92, for example downstream of the dispensing wall 92. For another example, the one or more (opening) elements can include a filtering function. For example, each of the one or more elements includes a corresponding cavity that, after piercing or tearing the dispensing wall 92, enters into communication with the internal volume of the compartment 91, allowing the beverage to flow out of the container via the one or more cavities of the one or more elements; however, the corresponding cavity prevents (for example, due to their diameter) coffee particles from flowing through the one or more cavities and thus out of the container and into the cup.

[0063] Figure 2 An example is schematically shown in which relatively small coffee particles 1, i.e., coffee particles having a volume moment average value of less than 350 μm, are in direct contact with the dispensing wall 92. In this example, the small coffee particles 1 accumulate at the small openings 92a and reduce the flow rate through the small openings 92a. This is because the small coffee particles 1 and water squeeze the small openings 92a, thus reducing the flow rate through the small openings 92a. As a result, not only are the coffee particles 1 prevented from flowing through the dispensing wall 92, but the water is also prevented from (properly) flowing through the dispensing wall 92, leading to blockages in the container and, consequently, high pressure, which may also prevent the beverage preparation machine from providing / pumping water at the desired pressure.

[0064] In order to solve the above-mentioned clogging disadvantages while still having relatively small-sized coffee particles, in particular with increased coffee extraction yield, the present invention proposes to provide coffee particles contained in compartment 91 such that the coffee particles include first coffee particles 1 and second coffee particles 2 as described below.

[0065] According to a first embodiment, in particular with reference to Figure 2 The coffee particles contained in compartment 91 include a first group of first coffee particles 1 having a first volume moment average value D[4,3] and a second group of second coffee particles 2 having a second volume moment average value D[4,3]. The second group of second coffee particles 2 is arranged downstream of the first group of first coffee particles 1 and in direct contact with dispensing wall 92. The second volume moment average value is greater than the first volume moment average value. A "group" should be understood as a complete and therefore non-separate unit.

[0066] Therefore, since the second group of second coffee particles 2 has a larger second volume moment average value than the first group of first coffee particles 1, the first coffee particles 1 are substantially prevented from directly contacting the dispensing wall 92, in particular, directly contacting the small openings 92a, such as Figure 3exemplarily shown in . The aforementioned clogging of the first coffee particles 1 is thus effectively prevented or at least significantly reduced. However, the second coffee particles 2 having the second volume moment average value allow water and therefore the extracted coffee beverage to flow between these second coffee particles 2, so that the water can reach the distribution wall 92 and leave the container via the distribution wall 92, for example, to be subsequently distributed in a cup. For example, each orifice (small opening or hole) 92a is smaller than the second volume moment average value, thereby preventing the second coffee particles 2 from passing through the orifice 2 and therefore through the distribution wall 92, but allowing the beverage to flow through the orifice. Therefore, the second coffee particles 2 are effectively prevented from clogging the orifice 92a and the distribution wall 92. Each hole 92a, that is, the flow area of ​​each hole 92a is not limited to a specific contour (or shape). That is, the contour can be in the form of a circle, an ellipse, a rectangle, a polygon, etc. Preferably, the diameter of each orifice or the maximum possible distance between two points of the outline of each orifice or the mesh size of the distribution wall 92 as a filter or mesh is smaller than the second volume moment mean, preferably at least 10%, 20%, 30%, 40%, or 50% smaller than the second volume moment mean. For example, the diameter of each orifice or the maximum possible distance, i.e., the opening size of the orifice, is equal to or less than 400 μm, preferably equal to or less than 350 μm, and / or equal to or greater than 200 μm, preferably equal to or greater than 250 μm.

[0067] The second group of second coffee particles 2 is preferably arranged so that the second group of second coffee particles 2 covers at least some of the openings 92a or the portion of the distribution wall 92 where the openings 92a are to be provided. These portions of the distribution wall 92 may be opened by the one or more elements for providing the openings 92a. Thus, the second group of second coffee particles 2 may cover only a portion of the distribution wall 92, for example in the form of clusters or hillocks, thereby preventing clogging at least for this portion of the distribution wall 92. However, it is preferred that the (second group of) second coffee particles 2 cover the entire distribution wall 92, thereby covering all openings 92a or all portions of the distribution wall 92 where the openings 92a are to be provided. Additionally or alternatively, the second coffee particles 2 may be arranged so that the flow of water for preparing the beverage can leave the container only via the second coffee particles 2. The second coffee particles 2 may be arranged in direct contact with the side wall 88.

[0068] Furthermore, the (second group of) second coffee particles 2 are not limited to a particular form, as long as the aforementioned clogging is prevented or at least reduced for some portions or openings 92a of the dispensing wall 92, preferably for a majority (at least 50%) of the dispensing wall. Thus, the second coffee particles 2 may be layered on the dispensing wall (e.g., with a constant thickness) and / or arranged as a coffee bed and / or have a spherical shape in a cross-sectional view.

[0069] like Figure 3As shown exemplarily, the first coffee particles 1 may be layered on the second coffee particles 2 and / or may be in direct contact with the second coffee particles 2. Therefore, no element such as a partition wall is required between the first coffee particles 1 and the second coffee particles 2. The first coffee particles 1 may be accommodated in the compartment 91 so as to be in direct contact with the side wall 88 and / or the injection wall 89. When the second coffee particles 2 only cover a portion of the distribution wall 92 as described above, the first coffee particles 1 may be in direct contact with the distribution wall 92. In this way, the first coffee particles 1 may block a portion of the distribution wall 92 (e.g. some of the openings 93a), however, since the second coffee particles 2 still cover a large portion of the distribution wall 92 (and therefore cover a large portion of the openings 92a), clogging of the container is still significantly reduced. However, preferably, no coffee particles of the first coffee particles 1 are in direct contact with the distribution wall 92. The first coffee particles 1 are arranged as a layer and / or a coffee bed.

[0070] The first coffee particles 1 can be filled in the compartment 91 so as to cover the entire surface of the compartment 91, which surface is seen from the inside of the compartment 91 (i.e. the inner surface) and is not covered by the second coffee particles 2. For example, the first coffee particles 1 cover the inner surface of the injection wall 89 and / or the inner surface of the side wall 88, which surfaces are not in direct contact with the second coffee particles 2. For example, by the design of the compartment, the first coffee particles 1 and the second coffee particles 2 can be accommodated and compacted in the compartment 91, so that the compaction holds the first coffee particles 1 and the second coffee particles 2 in a predetermined manner, in particular in a manner that prevents or at least reduces the first coffee particles 1 from clogging the container, for example at a first height and a second height as described below. Therefore, during transportation of the container, the compaction prevents or at least reduces the migration of the first coffee particles 1 between the second coffee particles 2 to the distribution wall 92. The compaction preferably generates a resultant force (e.g. 1000 N) that holds the coffee particles together substantially in their predetermined manner.

[0071] In addition to or as an alternative to compaction, the compartment 91 can include a retaining structure designed to retain the coffee particles, i.e., the first coffee particles 1 and the second coffee particles 2, in a corresponding predetermined manner. The retaining structure can be formed integrally with the compartment 91 (e.g., in the form of one or more recesses and / or protrusions, which preferably surround the corresponding coffee particles) and / or can be provided separately from the compartment. In particular, the retaining structure can be formed integrally with the injection wall 89 and / or the dispensing wall 92 and / or the side wall 88 or provided separately from the injection wall and / or the dispensing wall and / or the side wall.

[0072] like Figure 1 and Figure 2As exemplarily shown in FIG, the second coffee particles 2 may be arranged (e.g. layered) in the container or compartment 91 at a (first) height h1 from the dispensing wall 92 to (the lower surface of) the first coffee particles. The height h1 may be the thickness of the layer of second coffee particles 2 and / or may be measured along a line perpendicular to the dispensing wall 92 and / or parallel to the axis or axis of symmetry of the container or compartment 91, in particular in a state where the dispensing wall 92 is not pressurized or engaged with the one or more elements for opening the dispensing wall 92 and is therefore, for example, substantially flat (see FIG. Figure 1 The height h1 is preferably equal to or greater than 1000 μm, more preferably equal to or greater than 1500 μm, 2000 μm, 2500 μm, 3000 μm, 3500 μm, 4000 μm, 4500 μm, or 5000 μm.

[0073] Especially Figure 1 As shown, the first coffee particles 1 can be arranged from (the upper side of) the second coffee particles 2, for example, from a first height hi to a total height h of the coffee particles. total Another height (second height) h2 of the coffee particles is provided (eg stacked) in the container or compartment 91. The total height h of the coffee particles is total It may correspond to the height or depth of the compartment 91, for example the distance between the injection wall 89 and the distribution wall 92. The second height h2 and the total height h are preferably measured corresponding to the measurement of the first height h1. total That is, the second height h2 and the total height h total It can be measured along a line perpendicular to the dispensing wall 92 and / or parallel to the axis or axis of symmetry of the container or compartment 91, in particular in a state where the dispensing wall 92 is not pressurized or engaged with the one or more elements for opening the dispensing wall 92 and is therefore, for example, substantially flat (see Figure 1 ). The height h2 of the first coffee particles 1 can be the thickness of the first coffee particle layer, and the total height h total The second height h2 is preferably equal to or greater than 5000 μm, 6000 μm, 7000 μm, 8000 μm, 9000 μm, 10000 μm, 11000 μm, 12000 μm, 13000 μm, 14000 μm, 15000 μm, 16000 μm, or 17000 μm. The ratio of the first height h1 to the second height h2 is preferably in the range of 1:1 to 1:20, more preferably in the range of 1:10 to 1:20, even more preferably in the range of 1:10 to 1:15 or 1:2 to 1:5, for example in the range of 1:3 to 1:4.

[0074] The first coffee particles 1 may have a first volume, and the second coffee particles 2 may have a second volume. Each volume may be defined by the amount of the corresponding coffee particles and the average of the volume moments of the corresponding coffee particles. For example, if the first coffee particles 1 and the second coffee particles 2 are stacked in the compartment 91 so that the coffee particles 1, 2 are arranged at specific heights h1, h2 and are in direct contact with the side walls, the corresponding volumes can be calculated using the geometric shape of the compartment 91 (e.g., in the form of a cylinder or a truncated cone) and the corresponding heights. The ratio of the first volume to the second volume may be in the range of 1:1 to 20:1, preferably in the range of 10:1 to 20:1, even more preferably in the range of 10:1 to 15:1 or 2:1 to 5:1, for example in the range of 3:1 to 4:1.

[0075] In the following, reference Figure 1 and Figure 3 A second preferred embodiment is described which also prevents or at least significantly reduces the disadvantages of clogging while still having coffee particles of relatively small particle size to achieve an increased yield of coffee extraction. The above description, in particular of the first embodiment, applies equally to the second embodiment, unless otherwise stated below.

[0076] According to a second embodiment, the coffee particles are arranged over a total height within the compartment 91, for example a total height h as described above. total , wherein the coffee particles arranged from the dispensing wall 92 to a first height (e.g., the first height h1 as described above) are second coffee particles 2 having a second volume moment average value D[4,3], wherein the coffee particles arranged in the distribution wall 92 extend from the first height h1 of the coffee particles to the total height h total The coffee particles at the second height (for example, the second height h2 as described above) are first coffee particles 1 having a first volume moment average value D[4,3]. The second volume moment average value is greater than the first volume moment average value.

[0077] In the following, reference Figure 1 and Figure 3 A third preferred embodiment is described which also prevents or at least significantly reduces the disadvantages of clogging while still having coffee particles of relatively small particle size to achieve an increased yield of coffee extraction. The above description, in particular of the first and second embodiments, applies equally to the second embodiment, unless otherwise stated below.

[0078] According to the third embodiment, the coffee particles in direct contact with the dispensing wall 92 are second coffee particles 2a having a second volume moment average value D[4, 3], wherein the coffee particles arranged upstream of the second coffee particles 2a are first coffee particles 1 having a first volume moment average value D[4, 3], wherein the second volume moment average value is greater than the first volume moment average value. Therefore, the third embodiment differs from the other embodiments in that the second coffee particles 2a are the coffee particles in direct contact with the dispensing wall, i.e., the second coffee particles 2a.

[0079] A common feature of all embodiments is that the second volume moment average is greater than the first volume moment average, thereby preventing coffee particles having the first volume moment average from coming into direct contact with the dispensing wall. Thus, clogging is effectively prevented or at least reduced, and coffee extraction yield is improved because the first volume moment average is less than the second volume moment average. The second volume moment average is preferably equal to or greater than 350 μm, more preferably equal to or greater than 400 μm or 450 μm or 500 μm or 550 μm or 600 μm or 650 μm or 700 μm. The second volume moment average is preferably equal to or less than 900 μm, more preferably equal to or less than 850 μm or 800 μm or 750 μm or 700 μm or 650 μm or 600 μm. The first volume moment average is preferably less than 550 μm, more preferably equal to or less than 500 μm or 450 μm or 400 μm or 350 μm or 300 μm or 250 μm or 200 μm or 150 μm or 100 μm. The second volume moment mean may be at least 15% or at least 20% or at least 30% greater than the first volume moment mean.

[0080] Container, compartment 91, side wall 88, injection wall 89 and distribution wall 92 are not limited to specific materials. Side wall 88, injection wall 89 and / or distribution wall 92 can be made of plastic and / or metal material (such as aluminum) and / or paper (composite material). The plastic used can be a single-layer or multi-layer plastic, which is compatible in the food field and is selected from the group consisting of EVOH, PVDC, PP, PE, PA. Side wall 88, injection wall 89 and / or distribution wall 92 can also be made of filter paper and / or any other biodegradable or compostable material. When the material meets the requirements established by European standard EN 13431 ("Packaging-Requirements for packaging recoverable through composting and biodegradation-Test scheme and evaluation criteria for the final acceptance of packaging"), the material should be understood as "compostable". Compostable materials can be one or more of the following materials: polymers extracted from biomass (e.g., polysaccharides such as cellulose-starch, lipids, proteins); synthetic polymers (e.g., polylactic acid-PLA derived from starch fermentation); polymers produced by genetically modified microorganisms or bacteria (e.g., polyhydroxyalkanoates-PHA); polymers from fossil monomers (e.g., polybutyl succinate-PBS); and mixtures (so-called "complexes") of the above substances with or without the introduction of additives such as nanoparticles (e.g., talc, Cloisite). The material of the filter paper is preferably selected from the group consisting of filter paper, woven fibers, and non-woven fibers. The fibers can be made of PET (polyethylene terephthalate) or PP (polypropylene) or some other polymers. Depending on the type of material used, the thickness of the material used is preferably between 5 and 100 microns. The sidewalls 88, injection wall 89, and / or distribution wall 92 are preferably suitable for enclosing the compartment 91 in an aroma-proof manner. The sidewalls 88, injection wall 89, and / or distribution wall 92 can have a single-layer or multi-layer structure. The side walls 88, the injection wall 89 and / or the distribution wall 92 may include a coating.

[0081] The material of the distribution wall 92 may have a permeability of not less than 12 N (permeation rate according to ASTM F 1306 90: 300 mm / min for a sample with a thickness of 100 μm). The distribution wall 92 may have a thickness between 20 μm and 2 mm, preferably between 50 μm and 0.5 mm, and in a particularly preferred embodiment, between 60 μm and 300 μm. Preferably, the distribution wall 92 is perforated over at least 25% of its entire surface.

[0082] The container may also include additional structures for interacting with the pressurized water flow. These additional structures may be arranged upstream or downstream of the distribution wall 92. Another exemplary structure arranged downstream of the distribution wall is a single opening 95, which is preferably arranged concentrically with the compartment 91 and / or is arranged at the bottom of the container. The opening 95 can be formed as a tubular portion. Therefore, the beverage can flow along the recessed element 94 forming the space and eventually reach the opening 95. Therefore, this opening 95 allows the beverage to flow into a cup (not shown) arranged below or downstream of the opening 95. The container can be manufactured by thermoforming, which makes it possible to directly obtain one or more of the aforementioned elements.

[0083] Examples 1-6 are shown below to illustrate the effects of the present invention. Each example uses a container in the form of a pod or capsule, namely, a Nespresso-shaped container in Examples 1, 5, and 6, and a Nestlé Dolce Gusto (NDG)-shaped container in Examples 2, 3, and 4. In the container design column, the ratio in parentheses following the corresponding container design represents the ratio of first coffee particles to second coffee particles. The last column of the table indicates whether the corresponding container has no product flowing out of the container (PNCO), that is, whether the container is blocked, so that no or substantially no beverage leaves the container (PNCO: yes), or is unblocked, so that beverage leaves the container (PNCO: no).

[0084]

[0085] As can be seen in Comparative Examples 1 and 2, the second volume moment average value is very small and causes clogging of the container. In contrast, in each of Examples 3-6, the second volume moment average value is greater than the second volume moment average values ​​of Examples 1 and 2, respectively, and thus does not cause clogging of the container; the second coffee particles of Examples 3-6 therefore effectively control the pressure in the corresponding container so that clogging does not occur. Furthermore, in each of Examples 3 and 6, the corresponding second volume moment average value is greater than the corresponding first volume moment average value. Therefore, compared to Examples 4 and 5, these Examples achieve a higher coffee extraction yield due to the smaller first volume moment average value. Therefore, Examples 3 and 6 not only prevent clogging of the corresponding container (in contrast to Examples 1 and 2), but also achieve a higher coffee extraction yield than Examples 4 and 5.

[0086] It will be clear to the skilled person that the embodiment shown in the figures is only a preferred embodiment, but other designs of the container may also be used. In particular, the container is not limited to only the first coffee particles (e.g. the layer or group) and the second coffee particles. For example, the container may comprise one or more further (e.g. layers or groups) of coffee particles (i.e. a total of three or more (layers or groups) of coffee particles), which may be arranged upstream of the first coffee particles and / or the second coffee particles or between the first coffee particles and the second coffee particles. Thus, the second coffee particles effectively prevent clogging in the capsule, so that any type of particles or layers can be freely provided upstream of (or on top of) the second coffee particles, in particular (coffee) particles whose mean volume moment is smaller than the mean volume moment of the second coffee particles (but also comprising other additives).

[0087] The invention has been described with reference to various embodiments as examples and implementations. However, other variations will be apparent to and will be realized by those skilled in the art and by those practicing the claimed invention, based on a study of the drawings, this disclosure, and the independent claims. In the claims and the specification, the word "comprising" does not exclude other elements or steps, and the indefinite article "a" or "an" does not exclude a plurality. A single element or other unit may fulfill the functions of several entities or items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used in an advantageous embodiment.

Claims

1. A container for beverage preparation, comprising a compartment (91) containing ground coffee particles (1, 2) to be extracted, wherein the compartment (91) is adapted to be penetrated by a pressurized water flow from an injection wall (89) of the container towards a dispensing wall (92) of the container for preparing a beverage from the coffee particles (1, 2), The coffee particles (1, 2) include: a first group of first coffee particles (1), the first group of first coffee particles having a first volume moment average value D[4,3], and a second group of second coffee particles (2), said second group of second coffee particles having a second volume moment mean value D[4,3] and arranged downstream of said first group of first coffee particles (1), wherein said second group of second coffee particles (2) is in direct contact with said dispensing wall (92), The second volume moment average value is greater than the first volume moment average value. 2 . The container according to claim 1 , wherein the second volume moment mean value is equal to or greater than 350 μm, and / or wherein the second volume moment mean value is equal to or less than 900 μm.

3. The container according to claim 2, wherein the second volume moment average is equal to or greater than 400 μm or 450 μm or 500 μm or 550 μm or 600 μm or 650 μm or 700 μm.

4. The container according to claim 2, wherein the second volume moment average is equal to or less than 850 μm or 800 μm or 750 μm or 700 μm or 650 μm or 600 μm.

5. The container according to any one of claims 1 to 4, wherein the second volume moment mean is at least 15% or at least 20% or at least 30% greater than the first volume moment mean.

6. A container according to any one of claims 1 to 4, wherein the first coffee particles (1) have a first volume, and wherein the second coffee particles (2) have a second volume, wherein a ratio of the first volume to the second volume is in the range of 20:1 to 1:

1.

7. The container of claim 6, wherein a ratio of the first volume to the second volume is in the range of 20:1 to 10:

1.

8. The container according to any one of claims 1 to 4, wherein the first coffee particles (1) are layered on the second coffee particles (2) and / or wherein the first coffee particles (1) are in direct contact with the second coffee particles (2).

9. A container according to any one of claims 1 to 4, wherein the second coffee particles (2) are arranged so that the water flow for preparing the beverage can leave the container only via the second coffee particles (2), and / or wherein the second coffee particles (2) are layered on the distribution wall (92), and / or wherein the first coffee particles (1) and / or the second coffee particles (2) are arranged as a coffee bed, and / or wherein the second coffee particles (2) cover the entire distribution wall (92).

10. A container according to any one of claims 1 to 4, wherein the second coffee particles (2) are arranged in the container at a first height (h1) from the distribution wall (92) to the first coffee particles (1), and / or wherein the ratio of the first height (h1) to the second volume moment average is at least 2:1 or at least 5:1 or at least 9:

1.

11. The container according to claim 10, wherein the second coffee particles (2) are stacked in the container at a first height (hi) from the dispensing wall (92) to the first coffee particles (1). 12 . The container according to claim 10 , wherein the first height ( h1 ) is equal to or greater than 1000 μm.

13. The container according to claim 10, wherein the first height (h1) is equal to or greater than 1500 μm or 2000 μm or 2500 μm or 3000 μm or 3500 μm or 4000 μm or 4500 μm or 5000 μm.

14. The container according to claim 10, wherein the first coffee particles (1) are arranged with a total height (h total ) is arranged in the container, and / or wherein the ratio of the first height (h1) to the second height (h2) is in the range of 1:1 to 1:

20.

15. The container according to claim 14, wherein the first coffee particles (1) are arranged from the first height to the total height (h total ) is arranged in the container.

16. The container according to claim 14, wherein the first coffee particles (1) are arranged with a total height (h total ) are stacked in the container at a second height (h2).

17. The container according to claim 14, wherein the second height is equal to or greater than 5000 μm or 6000 μm or 7000 μm or 8000 μm or 9000 μm or 10000 μm or 11000 μm or 12000 μm or 13000 μm or 14000 μm or 15000 μm or 16000 μm or 17000 μm.

18. The container according to claim 14, wherein a ratio of the first height (hi) to the second height (h2) is in the range of 1:10 to 1:20 or 1:1 to 1:

15.

19. The container according to claim 14, wherein a ratio of the first height (h1) to the second height (h2) is in the range of 1:2 to 1:

5.

20. The container according to claim 14, wherein a ratio of the first height (hi) to the second height (h2) is in the range of 1:3 to 1:

4.

21. A container according to any one of claims 1 to 4, wherein the compartment (91) comprises at least a portion of the injection wall (89) and / or at least a portion of the dispensing wall (92) and / or a side wall (88) surrounding the coffee particles (1, 2).

22. Capsule according to claim 21, wherein the injection wall (89) and / or the dispensing wall (92) and / or the side wall (88) are in direct contact with the coffee particles (1, 2).

23. The container of any one of claims 1 to 4, wherein the first volume moment average is less than 550 μm.

24. The container of claim 23, wherein the first volume moment average is equal to or less than 500 μm or 450 μm or 400 μm or 380 μm or 350 μm or 300 μm or 250 μm or 200 μm or 150 μm or 100 μm.

25. A container according to any one of claims 1 to 4, wherein the distribution wall (92) includes a filter for preventing at least the second coffee particles (2) from passing through the distribution wall (92), and / or wherein the distribution wall (92) includes an orifice (92a) or is arranged to be provided with an orifice (92a), wherein each of the orifices (92a) is smaller than the second volume moment average, so that the second coffee particles (2) are prevented from passing through the orifice (92a) and thereby through the distribution wall (92), but the beverage is enabled to flow through the orifice (92a).

26. A container according to claim 25, wherein the diameter of each of the orifices (92a) or the maximum possible distance between two points of the contour of each of the orifices (92a) is smaller than the second volume moment mean.

27. A container according to claim 25, wherein the diameter of each of the orifices (92a) or the maximum possible distance between two points of the contour of each of the orifices (92a) is at least 10% or 20% or 30% or 40% or 50% smaller than the average value of the second volume moment.

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