EP2911953A2

EP2911953A2 - Capsule for holding a brewing material, such as coffee, tea and similar substances, and method for sealing such a capsule

Info

Publication number: EP2911953A2
Application number: EP13830201.3A
Authority: EP
Inventors: Robert MARTY; Heinz Oster
Original assignee: CSTEC GmbH
Current assignee: CSTEC GmbH
Priority date: 2012-10-29
Filing date: 2013-10-24
Publication date: 2015-09-02
Also published as: WO2014067507A2; CN104884368A; DE112013002899A5; WO2014067507A3

Abstract

Various coffee capsules are known in the prior art. The most well-known capsules consist of an aluminium body having a sealing foil. The body is of conical construction such that the body can be ejected from a brewing machine. At the capsule base there is a protruding rim. Said rim is needed for the brewing machine to be able to approach the capsule and form a seal therewith, in order to subsequently be able to inject hot water at pressure into the capsule. The aim of the invention is to provide an improvement of or an alternative to the prior art. The present patent application puts forward numerous inventive approaches, in particular in respect of the choice of material and the geometry of the capsule.

Description

CAPSULE FOR RECIPROCATING A BREAKING LIQUE SUCH AS COFFEE, TEA AND THE SIMILAR, AND METHOD FOR DISMISSING SUCH A CAPTAIN

The invention relates to a capsule for receiving a Brühguts such as coffee, tea and the like and for brewing in the capsule, and a method for closing such a capsule.

[02] Generic capsules are known for example from US 2005/0183578 AI.

task

[03] The object of the present invention is to provide an improvement or an alternative to the prior art.

solution

[04] The object is solved by the subject matter of each of the independent claims, but in particular in any combination. Optional advantageous embodiments are given in the dependent claims, the description and the drawings.

[05] Thus, according to a first aspect of the present invention, the stated object solves a capsule as a container for receiving a Brühguts such as coffee, tea and the like, as well as for brewing in the capsule with the addition of a brewing medium, in particular hot, almost boiling or boiling water wherein the capsule comprises a capsule head for the passage of a perforator for adding the brewing medium, the Weiter ren has a closed with a bottom closure, especially a bottom foil, closed capsule base, and having a capsule wall which extends from the capsule head to the capsule root, preferably with an at least substantially frustroconical shape or otherwise tapering from the capsule root to the capsule head, wherein the capsule is preferably filled with the material to be brewed, whereby the capsule thereby in that the capsule head and / or the capsule wall comprise a plastic, preferably polybutylene terephthalate (PBT) and / or a plastic from the PBT family, wherein the capsule head and / or the capsule wall has a modification which reduces the ball pressure hardness of the plastic. [06] A concept is explained that a "capsule" is a self-stable component, so a capsule differs from, for example, a soft pad and, of course, a large box or bag, which is intended as a reserve pack -Portion- capsule to understand.

[07] With regard to the general structure, the present patent application essentially defines three parts on a capsule, namely capsule head, capsule wall and capsule foot. The capsule foot is the designated outlet side for the brewed beverage, so for example, the coffee beverage, the tea beverage, the milk drink or play meadow of a soup drink.

[08] At the capsule foot the bottom closure is arranged. In conventional machines on the market, such a capsule can usually insert in approximately horizontally lying position. However, the capsule can be easily put on the capsule foot, that is, on the usually arranged there closure foil. In the context of the present patent application is generally assumed to simplify the understanding of a capsule, which is at the time of Beschriebenvertdens on the capsule foot, so that an existing longitudinal extension direction and / or axis of symmetry of the capsule extends vertically. The brewing medium is to be introduced into the capsule at the capsule head in the case of a first type of brewing machine, and it is intended to leave the capsule through the bottom closure at the capsule foot. In a second type of brewing machine, the direction of passage of the brewing medium is provided exactly the other way round, that is to say for entry into the capsule through the bottom closure, usually a foil, and for exit through the capsule head. [10] The capsule wall is ideally designed to be essentially frustoconical or otherwise tapered from the capsule foot to the capsule head so that it can be more easily released from a receptacle in the brewing machine after use, ie after brewing, and ideally falls out of the receptacle even by gravity , In any case, the retaining surfaces, that is, those surfaces which are to cooperate with the recording in the machine, are therefore ideally non-cylindrical shaped.

[11] The "surrounding" around the capsule wall is simply a geometric circular path which is orthogonal to an upright axis of the capsule, with the upright axis extending from the capsule root to the capsule head.

With the plastic for the production of the wall of the capsule wall and / or the capsule head, the capsule can be produced very inexpensively, for example by injection molding, at the same time very high manufacturing precession and production speed are achieved. Even plastics, which greatly reduce the passage of gas, are still so leaky in the rule that a diffusion through the wall takes place, along with the associated loss of aroma quality of the brewed beverage.

[13] It has been found in extensive prototype experiments by the inventors that the PBT plastics (classification according to standard ISO 1043-1) for the purposes of the capsule have an unexpectedly high aroma-density suitability, although they are generally difficult to process.

Extensive experiments by the inventors have shown that a plastic should have as many of the following properties: o Viscosity number 80 to 100, especially 83 to 93, especially about 88 cmVg, according to testing standards ISO 307, 1157, 1628, with a Solution of 0.005 g / ml phenol 1, 2 dichlorobenzene 1: 1; o water absorption (saturation in water at 23 ° C) 0.3 to 0.7%, especially about 0.5%, according to test standard ISO 62 (analog); o Moisture absorption (saturation in normal climate with 23 ° C and 50% relative humidity) 0.2 to 0.3%, especially about 0.25%, according to test standard ISO 62 (analog); o melt volume rate MVR (at 250 ° C, and 2, 16 kg) 90 to 130, in particular 100 to 120, especially about 110 cm ^3/10 min, according to ISO 1133 test standard. o melt temperature range for injection molding between 235 and 285 ° C, especially between 245 ° C to 275 ° C or within this interval; O Mold temperature range for injection molding between 35 ° C and 80 ° C, especially from 40 ° C to 70 ° C or within this interval; o Tensile E-modulus 2,100 to 3,100 MPa according to ISO 527-1 / -2 (1 mm / min), especially 2,200 to 2,600 MPa, in particular about 2,400 MPa; o yield stress 51 to 61 MPa, above all about 56 MPa, according to ISO 527-1 / -2 (50 mm / min); o elongation at break 1.8% to 2.8%, especially about 2.3%, according to ISO 527-1 / -2 (50 mm / min); Nominal elongation at break 10% to 18%, especially about 14%, according to test standard 527-1 / -2 (50 mm / min); o Charpy impact strength (at 23 ° C) 1 12 to 132 kJ / m ² , especially approximately 122 U / m ² , according to ISO 179 / leU test standard, o Charpy notched impact strength (at 23 ° C) 2,7 up to 3.7 kJ / m ² , preferably 3.0 to 3.4 kj / m ² , especially about 3.2 kJ / m ² , according to test standard ISO 179 / leA; o HDT-A value (heat deflection temperature under maximum bending stress of 1.8 N / mm ² ) 49 to 59 ° C, above all about 54 ° C, according to test standard ISO 75-1 / -2; o HDT-B value (heat deflection temperature under bending stress of maximum 0.45 N / mm ² ) 112 to 152 ° C, better 127 to 147 ° C, even better 132 to 142 ° C, especially about 137 ° C, after Test standard ISO 75-1 / -2; o Vicat softening temperature 201 to 231 ° C, better 206 to 226 ° C, especially about 216 ° C, according to test standard ISO 306 (VST / A / 50, 10 N, 50 K / h); and / or o Vicat softening temperature 165 to 195 ° C, better 170 to 190 ° C, especially about 180 ° C, according to test standard ISO 306 (VST / B / 50, 10 N, 50 K / h).

[15] Thus, the invention is expressly not limited to PBT, but generally to the above value ranges. PBT, however, according to current knowledge, the polymer for the preferred embodiment. [16] Not only are PBT plastics aroma-tight, but a modification can also be made well. Due to the modification of the plastic is so soft that it can be sealed without special measures with a sealing ring on the brim of his foot to build up the Brühdrucks in the brewing machine. This makes the capsule not only durable without repackaging, but still low in production. In addition, the plastic obtained in a suitable design is so brittle that piercing knife for filling the Brühmediums still puncture well.

[17] The modification can very well have an admixture, so that a second material is added to the plastic. The admixing preferably takes place before the molding process for the capsule, that is, for example, before the extrusion. Above all, it is easy to imagine that mixing takes place in the extruder or subsequently to extrusion.

[18] The preferred embodiment of the capsule comprises a thermoplastic elastomer, especially thermoplastic rubber. Rubbers have proven to be ideal in prototype tests. [19] The modified plastic can be processed very easily if the admixture is homogeneous.

[20] In addition to the above-mentioned modification, the capsule head and / or the capsule wall may comprise a gas barrier material, in particular in the form of an admixture, wherein the gas barrier material reduces a gas passage of oxygen relative to the plastic.

It is proposed that the barrier material, if present, has silicon, in particular silicon dioxide, and / or that the barrier material has a Mischpolyamid and / or that the barrier material is applied by means of an alcoholic solution, especially sprayed or in an immersion bath applied. [22] Silicon can not only be applied well to a plastic wall using various physicochemical processes, but can even result in a continuous glass layer when applied properly. This is according to prototype experiments of the inventors in any case so dense that the capsule without any additional packaging in the form of bags or the like can be eelaeert at least one year without losing a significant proportion of the flavor. The thicker the glass layer is made, the closer the capsule encloses the aroma. Some prototypes have shown such a low gas penetration that the inventors assume that even after two years no noticeable reduction of the aroma has occurred.

[23] When using a mixed polyamide, a synthetic material with a high barrier effect is preferred.

[24] It is preferable to use an admixture of 5% to 20% of a barrier particle s and / or a barrier resin for the mixed polyamide.

[25] Preferably, the barrier layer is applied to the wall as a surface coating, specifically directed towards the outside and / or the inside of the capsule. According to the current state of development of the inventors, an alignment of the barrier layer towards the inside of the capsule is preferred. This is because that then any mechanical action on the surface from the outside, for example, when handling the end user with the capsules, not the tightness of the capsule is compromised.

The surface coating should ideally cover the entire surface of the capsule wall and the capsule head to the inside and / or outside.

[27] In particular when using silicon or silicon dioxide as the barrier material, experiments by the inventors have resulted in a particularly advantageous layer thickness of at least about 30 nm or 40 nm, preferably at least 70 nm, in particular at an average layer thickness of 70 nm to 75 nm ] At this point it should be expressly pointed out that in the context of the present patent application, indications of ranges of values should not be understood as closed intervals, but as open intervals, unless a contrary statement emerges from the respective context. In the example above, the interval limits are on the one hand called 70 nm, on the other hand 75 nm. Both limits are normally understood as approximate limits, so that even slightly below or slightly higher values should still be covered by the interval. The closed interval without underneath and overlying boundaries should be understood as a particular, explicitly disclosed combination of features. [29] It should also be pointed out at this point that any indication of numbers or simple articles such as "a", "two", etc. should be understood as "minimum information", unless the contrary arises from the context in question , Thus, if "a coating" is described, then this should be understood as "at least one coating", so that, for example, several coatings can overlay each other or, for example, a coating on the inside and a coating on the outside of the capsule can be present.

[30] For the manufacturing process of the capsule, it has been found that the surface coating can be a plasma evaporation layer. A plasma evaporation can be carried out very well, for example with silicon dioxide.

[31] According to a second aspect of the present invention, the stated object solves a capsule as a container for receiving a Brühguts such as coffee, tea and the like, as well as for brewing in the capsule with addition of a brewing medium, in particular hot, almost boiling or boiling Water, wherein the capsule has a capsule head for the passage of a perforator for adding the Brühmediums, further comprising a closed with a bottom closure, especially a bottom foil, closed capsule foot, and a capsule wall which extends from the capsule head to the capsule foot, preferably see with an at least substantially frustrokoni or tapered from the capsule foot to the capsule head shape, the capsule is preferably filled with the Brühgut, wherein the capsule is characterized in that the capsule head has a standing on the capsule foot capsule flat head region, said the head area closed continuously n is formed, in particular with a wall thickness of at least about 0.3 mm or at least about 0.35 mm, wherein within the head region a weakened area is provided, which has a smaller wall thickness.

[32] The weakened area created in this way can be called "puncture ring" in a nutshell: it ensures that the capsule head is predominantly of such a large material thickness that the aroma-tightness and the mechanical properties are minimized Stability of the capsule are ensured, but the material weakening of the piercing ensures that the sting knife for filling the Brühmediums can easily pass through the capsule head.

[33] The weakened area can have a wall thickness of between about 0.15 mm and about 0.3 mm, which has proven to be very advantageous in experiments. Above all, with such a thin material, too little force builds up during grooving, so that the likelihood that the piercing knives might become jammed is reduced.

[34] If the weakened region both radially outward, ie towards the capsule wall, and radially inward, ie towards the center of the capsule head, adjacent stronger wall thicknesses than in the weakened area finds, the weakened area preferably a running around in terms Having the wall thickness weakened ring, then the guided against the weakened ring opening knife again easier to pass through than by the adjacent wall thickness. Because then the weakened ring is supported radially inside and radially outward stronger. It is proposed that the weakened ring has a wall thickness which has less than 75% of a surrounding wall thickness, in particular less than 50%, preferably between 25% and 35%, and / or in particular between 0, 1 mm and 0 , 3 mm, especially about 0.15 mm to 0.25 mm, the surrounding wall thickness may preferably be between 0.3 mm and 1 mm, in particular between 0.35 mm and 0.7 mm, especially about 0, 5 mm. [36] When standing on the capsule foot capsule can take an orthogonal through the weakened ring an acute angle of less than 30 ° relative to the vertical, preferably about 15 ° to 25 °. In the area of the designated puncture sites, such a design still has a rather horizontal area on the capsule head, but not quite horizontally.

In order to keep the weakened ring invisible from the outside, that is to say for the end user, it is proposed that the weakened region, in particular the weakened ring, has a wall thickness tapering from radially outside and / or from radially inside, preferably annular an inner side of the head portion, whereas on an outer side of the head portion, a surface at a boundary, preferably at all boundaries, of the weakened Passes through the area flush, so that the smaller wall thickness in the weakened area is not visible from the outside.

[38] According to a third aspect of the present invention, the stated object solves a capsule as a container for receiving a Brühguts such as coffee, tea and the like, as well as for brewing in the capsule with the addition of a Brühmediums, especially hot, almost boiling or boiling water , wherein the capsule has a capsule head for the puncture of a perforator for adding the Brühmediums, further comprises a closed with a bottom closure, especially a bottom foil, closed capsule foot, and having a capsule wall which extends from the capsule head to the capsule foot, preferably with at least one essentially frustroconical or tapering from the capsule base to the capsule head, wherein the capsule is preferably filled with the brewing material, wherein the capsule is characterized in that the capsule head is generally dome-like curved, with a central region flat, also dome-shaped or particularly valley-shaped trained s one can, the dome shape is spherical. [39] A dome shape has proven to be ideal for resisting puncture.

[40] In the context of the present patent application, a "dome-like" curvature means that the surface of the capsule head, when viewed on the capsule base, has a curve from the side in cross-section, that is to say in the shape of the dome It has been found that with a curved course at least over a portion of the radis on the capsule head already a very small material thickness enough to oppose the incoming perforations, in practice mostly knife, sufficient stability, not to depress the entire capsule head, but only bring about the targeted cuts.

[41] The central area of the dome can be designed differently. [42] It should be emphasized that the dome shape does not have to extend to the outer edge of the capsule head. Rather, it is sufficient if only a portion of the radius' of the capsule head is designed dome-shaped. [43] The inventors have observed - independently of this - that the capsules present on the market directly below the capsule head and thus above - standing on the capsule base capsule - the Brühguts have a distributor for the entering from the capsule head Brühmedium. Usually, a fleece or other component is provided here, which distributes from the top of accumulating Brühmedium in the area and then pass. As a practical effect, an introduced into the capsule head perforation, which is usually only point or slit, yet cause a full-surface irrigation of Brühguts.

[44] According to the inventors, such an approach, although it seems advantageous, certainly not necessarily advantageous and may even be disadvantageous depending on the design. In particular, the pressure build-up in the so-called shower distributor also reduces pressure, so that the coffee tastes more like percolated coffee depending on the specific design, so just can not fully exploit the advantage of the pressure brewing process.

[45] A shower-dispenser-free plastic capsule has yielded quite excellent results both in the taste of coffee drinks and in the foaming, ie in the so-called crema.

[46] According to a fourth aspect of the present invention solves the task a capsule as a container for receiving a Brühguts such as coffee, tea and the like, and for brewing in the capsule with the addition of a brewing medium, in particular hot, almost boiling or boiling water, wherein the capsule comprises a capsule head for piercing a perforator for adding the brewing medium, further comprising a capsule having a bottom closure, especially a bottom foil, and having a capsule wall which extends from the capsule head to the capsule root, preferably with at least one essential frustroconical or tapered from the capsule foot to capsule head shape, wherein the capsule is preferably filled with the Brühgut, wherein the capsule is characterized in that the capsule head has a standing on the capsule foot capsule flat head portion, the head having a plurality of grooves with a wheel Having ial course direction component, in particular a plurality of radially arranged grooves. [47] Such a design of the capsule head again helps to give the capsule head the required stability. Owing to the grooves or the like, the capsule head has a multiplicity of partial cross sections which are more vertical when the capsule is on the capsule base, which increases the area moment of inertia of the capsule head. With radially arranged grooves, it is easier for the usually tangentially oriented knives to place the predefined cuts in the capsule head in order to be able to fill the brewing medium.

[49] According to a fifth aspect of the invention, the stated object solves a capsule as a container for receiving a Brühguts such as coffee, tea and the like, and for brewing in the capsule with the addition of a brewing medium, in particular hot, almost boiling or boiling water, wherein the capsule comprises a capsule head for piercing a perforator for adding the brewing medium, further comprising a capsule having a bottom closure, especially a bottom foil, and having a capsule wall which extends from the capsule head to the capsule root, preferably with at least one essentially frustroconical or otherwise tapered from the capsule root to the capsule head, wherein the capsule is preferably filled with the brewing material, the capsule having a responder for an electronic communication unit so that a communication unit arranged in a brewing machine can wirelessly receive information from the capsule . wherein the responder has a wirelessly readable data memory, in particular a bar code carrier or a resonant circuit, in particular an RFID chip; and / or is readable for an inductive sensor, for which purpose the responder has an electrically conductive admixture for the plastic of the capsule and / or has a conductor layer, in particular a metallic nonwoven or knitted fabric.

[50] If a brewing machine has a corresponding laser, then it can be ensured that, for example, the machine adjusts to the correct brewing values, for example with regard to the amount of brewing medium to be filled and / or the filling speed and / or the pressure to be built up For safety reasons, ensure that the machine only works with the capsules provided or approved by the machine manufacturer. [51] In all cases it can be reasonably well ensured that a brewing machine can check that only capsules actually intended for them are used. If an incorrect response signal is received, or even no response signal is obtained, the brewing machine can refuse the brewing process. [52] Regardless of the inductive or electrically conductive responder can be provided that a brewing machine has a color expert. For example, the color recognizer may be configured to recognize various types of capsule contents based on color markings.

[53] According to a sixth aspect of the present invention solves the task a capsule as a container for receiving a Brühguts such as coffee, tea and the like, as well as for brewing in the capsule with the addition of a brewing medium, in particular hot, almost boiling or boiling water, wherein the capsule has a capsule head for the puncture of a perforator for adding the brewing medium, further comprising a capsule having a bottom closure, especially a bottom foil, and having a capsule wall which extends from the capsule head to the capsule root, preferably with a capsule at least substantially frustroconical or otherwise tapering from the capsule root to the capsule head, the capsule preferably being filled with the infusion material, the capsule root having an annular disc-shaped rim, an upper side of the rim, thus the capsule-head-facing side of the rim, as Sealing surface for cooperating with e is designed inem sealing ring of a brewing machine, wherein the capsule is characterized in that the top has a web seal in the form of an annular elevation, which is arranged radially within a radially outer edge of the brim, preferably closer to the capsule wall than at the outer edge, preferably a second annular elevation is provided on the brim, in particular on the outer edge of the brim.

[54] In such a construction, the one or more annular ridges serve as a very stable seal with the brewing machine. Brewing machines for capsules with brims on the capsule base build up a brewing pressure, for which it is necessary to seal the space occupied by the capsule at the brim. For this purpose, the brewing machine leads a ring over the capsule head around the capsule so that the ring surrounds the capsule. The brewing machine then leads the ring down to the Brim. There, the upwardly projecting web seal ring can now increase the sealing effect. The bridge is preferably made quite solid and at least at its base, so where it rises from the brim, wider than the wall of the capsule and / or as the brim are thick. Preferably, the brim between the web seal and the second annular elevation is made thicker than the capsule wall.

[55] According to a seventh aspect of the present invention solves the task a capsule as a container for receiving a Brühguts such as coffee, tea and the like, and for brewing in the capsule with the addition of a brewing medium, in particular hot, almost boiling or boiling water, wherein the capsule comprises a capsule head for piercing a perforator for adding the brewing medium, further comprising a capsule having a bottom closure, especially a bottom foil, and having a capsule wall which extends from the capsule head to the capsule root, preferably with at least one see essential frustrokoni or tapered from the capsule foot to the capsule head shape, the capsule is preferably filled with the brewing material, wherein the capsule is characterized in that the capsule wall has on its surface facing the outside beads or waves, which only one Part of the capsule wall height erstr corners.

[56] An area left by the beads or waves on the capsule wall can then serve very well for placing a logo or product information. The provision of beads or corrugations in the capsule wall has been found to be a measure which does not critically lose much volume in the interior of the capsule, so that a sufficient amount of brewing material can still be provided in the capsule. At the same time, however, the quality in handling the capsule increases enormously: For example, attempts by the inventors have shown that a surface provided with corrugations or corrugations adheres less easily to a receptacle for capsules, for example in a machine. The ejection safety of the capsules is thereby increased, in addition, the buckling load of the wall is increased against an axial force on the capsule, but without having to consume more material than in a conventional smooth wall as known from the prior art. It has also been shown that it is advantageous if the beads or waves extend only over part of the Cape wall height. A part of the capsule wall height between the connection of the rim on the capsule foot on the one hand and the transition edge to the capsule head on the other hand is thus free of beads or waves, in particular completely smooth on the outside surface and preferably also completely smooth on the inside surface.

[59] Such an embodiment is particularly advantageous if the surface kept free from beads or waves is arranged at the bottom or, ideally, even directly next to the connection of the capsule base to the capsule wall. There, the diameter of the capsule is larger than further up the capsule wall, so there is a smooth wall already provides excellent mechanical stability.

[60] When the capsule is on the capsule base, a vertical, central axis of rotation of the capsule body is preferably present, onto which the beads or waves can be projected. In simple words, this means nothing else than that the beads or waves are to run vertically from the side when the standing capsule is viewed, ideally in the sense of an (imaginary) common cut. With (imaginary) extension of the edges of the waves and beads over the capsule head out upward. This facilitates the ejection of the capsule from a holder in the axial direction.

[61] According to an eighth aspect of the invention, the stated object solves a capsule as a container for receiving a brewing product such as coffee, tea and the like, as well as for brewing in the capsule with the addition of a brewing medium, in particular hot, almost boiling or boiling water, wherein the capsule comprises a capsule head for piercing a perforator for adding the brewing medium, further comprising a capsule having a bottom closure, especially a bottom foil, and having a capsule wall which extends from the capsule head to the capsule root, preferably with at least one essentially frustroconical or tapering from the capsule root to the capsule head, wherein the capsule is preferably filled with the brewing material, the capsule wall having a lower frustoconical area and an upper frustroconical area, the upper frustroconical area having a steeper wall pitch than the one lower frustrokoni cal region, wherein preferably a Versprung is arranged between the two frustrokonischen areas, the upper End of the lower frustrokoni see range transferred to a lower end of the upper frustrokoni see range, particularly preferably executed as Frustrokonischer ring.

[62] The inventors have decided in their experiments for such a design as preferred because an enormous amount of brewing material can be arranged inside the capsule.

[63] A ninth spekt of the invention provides a capsule as a container for receiving a Brühguts such as coffee, tea and the like before, and for brewing in the capsule with the addition of a Brühmediums, especially hot, almost boiling or boiling water, the capsule a capsule head for the passage of a perforator for adding the Brühmediums, further comprising a closed with a bottom closure, especially a bottom foil capsule capsule, and having a capsule wall which extends from the capsule head to the capsule foot, preferably with an at least substantially frustrokoni see or The capsule root has a peripheral rim which has a sealing foil on its side facing downwards on the capsule base, the sealing foil preferably being in the form of a multilayer foil, especially with an anti-oxidation victory directed downwards, with an inner layer comprising a metal, especially aluminum, and with a heat seal adhesive layer for entering into a connection to the plastic of the rim of the capsule, the capsule is preferably filled with the brewing material, in particular a capsule according to one of above aspects, wherein the sealing film is sealed to the brim by means of the heat seal adhesive.

[64] Ideally, the heat seal adhesive has been bonded to the plastic of the heat seal adhesive at a temperature between about 205 ° C and about 225 ° C, more preferably between about 210 ° C and 220 ° C. This temperature window is ideally suited to the use of the proposed plastics, especially PBT.

[65] For example, the aluminum may have a grammage of 3 to 10 g / m 2, especially about 6 g / m 2. [66] A tenth aspect of the invention proposes a capsule as a container for receiving a Brühguts such as coffee, tea and the like, as well as for brewing in the capsule with the addition of a brewing medium, in particular hot, almost boiling or boiling water, the capsule a capsule head for the passage of a perforator for adding the Brühmediums, further comprising a closed with a bottom closure, especially a bottom foil capsule capsule, and having a capsule wall which extends from the capsule head to the capsule foot, preferably with an at least substantially frustrokoni see or differently tapered from the capsule base to the capsule head, wherein the capsule wall in its upper third or its upper half has a wall thickness, wherein the capsule wall in the upper half or in the upper third inwardly from the capsule wall protruding has a staple nose, in particular a circumferential ring with continuous or under skilfully designed, or preferably as discrete noses,

Preferably, this is constructed so that the stacking nose has a free inner diameter which is smaller than an outer diameter at the transition from the capsule wall to the capsule head, so that in two identical nested capsules of the transition from capsule wall to capsule head of the inner capsule on the Stacking nose of the outer capsule finds a stop.

[68] The capsules can then be excellently delivered as a stacked product. If the stacking lugs are not made as a circumferential ring but discretely distributed evenly or unevenly around the circumference of the capsule, then the capsule can be more easily demoulded during their manufacture.

[69] It is expressly emphasized that a capsule can simultaneously exhibit the features of several of the abovementioned aspects of the invention, in any combination, but in particular of all the aspects of the invention mentioned above.

[70] The invention will be explained in more detail below on the basis of exemplary embodiments with reference to the drawing. Show there 1 shows schematically in a perspective view obliquely from above a capsule with a brewing material contained therein in the form of ground coffee according to a first embodiment of the invention,

2 shows the capsule from FIG. 1 in a side view, FIG. 3 shows the capsule from FIGS. 1 and 2 in a section,

FIG. 4 is a perspective view of another embodiment of a capsule;

Figure 5 is a perspective view similar to Figures 1, 3, 5 and 7 is a preferred

Embodiment of the capsule,

6 shows in a vertical section a capsule according to a presently preferred embodiment

Figure 7 in a radial cross section in detail a capsule foot with a sealing ridge and a sealing ring; such as

FIG. 8 shows in a vertical central section two identical capsules stacked on one another as an example of an advantageous arrangement as rod product for further processing, in particular for filling with brewing material.

The capsules 1 in the figures each consist essentially of a capsule head 2, a capsule wall 3 and a capsule foot 4 with a radially projecting rim fifth

An interior of the capsule 1 is filled with a ground coffee powder. The capsule foot 4 is closed by a sealing foil (covered).

[73] The brim 5 has a sealing region 6. This has preferably circumferential rings in the form of a solid web 7 (see Figure 6) for a web seal against an annular sealing die of a brewing machine. The capsule wall 3 is in each case divided into a lower region 10 and an upper region 11. Between the lower portion 10 and the upper portion 11 is a small annular recess 12th

The lower portion 10 of the capsule wall 3 widens frustoconically from the capsule head 2 respectively from the transition ring to the capsule foot 4 out on. The upper portion 1 1 of the capsule wall 3 may, for example be eiswiese be continued at the same angle as the lower portion 10, or it may be less or more tapered or he may, for example, even be cylindrical

[76] In the example of the capsule from FIG. 6, the transition ring 10 'is even executed independently as a truncated cone. [77] The capsule head 2 has a dome 13, which begins immediately at an edge 14 to the capsule wall 3 out. In contrast, in a central region 15, the dome 13 does not continue, but turns into a depression directed towards the interior of the capsule 1.

The capsule 41 in FIGS. 1, 2 and 3 again consists of a capsule head 42 with a dome-shaped outer region 43 and a lower central region 44. The capsule head extends as far as a transition ring 45 to form a capsule wall 46 is divided in the axial extent of the capsule 41 into three areas: a lower portion 47, a central portion 48 and an upper portion 49. The lower portion 47 has a smooth surface 50. Above the ring with the smooth surface 50, the middle area closes 48 on. This has longitudinally extending beads 51 (numbered on an exemplary basis), which extend over more than half the axial extent of the capsule wall 46. They close up to the upper portion 49, which is cylindrical and extends to the transition edge 45 with the capsule 42.

[79] The volume of the capsule shown here is quite large. The material used nevertheless gives a mass of only 1.5 g. The capsule 52 in FIG. 4 has radially extending grooves 55 (identified by way of example) on its dome-shaped part 53 of the capsule head 54. These continue beyond a transition edge 56 on a capsule wall 57. In a plan view of the capsule 52, therefore, the course of the radial edges on the capsule head is highlighted. In a tangential respect, a relatively large area 58 on the capsule wall 57 is smooth-surfaced and thus comes into strong optical contrast to the usual design of the capsule wall 57 with corrugations or beads. This surface can be used well to apply a logo or lettering. [82] In a preferred embodiment of the capsule 60 in Figure 5 also has such a smooth surface 61, for example, to carry a logo or lettering. The smooth surface 61 is preferably made in a high gloss finish.

[83] It is also preferable for a high-gloss surface if a lower smooth ring 62 is provided on a capsule wall 63. Preferably, the same surface treatment technology takes place on the surface of the smooth ring 62 as in the smooth surface 61.

The entire capsule wall 63, moreover, including an intermediate ring 64 and the substantially cylindrical upper part 65 and an outer portion 66 of a dome-shaped capsule head 67 have corrugations 68 (identified by way of example), the course of the corrugations or beads 68 being radial Course is carried out continuously on the capsule head 67 to the capsule wall 63 towards.

[85] A depression is provided in an inner central area 69. Also around the inner central region 69, a smooth surface is provided in a central region 70 of the dome on the capsule head 67.

[86] With the exception of the high-gloss surfaces for the logo and the ring, the surfaces of the capsule 60 have been finely eroded matt. The capsule of the type shown can be used in a single-portion brewing machine such as a coffee maker. The capsules are preferably made aroma-tight. In the machine, a capsule of, for example, three blade tips on the capsule head is slit in such a way that water introduced under pressure can flow into the capsule through the slits at up to 19 bar. The best possible distribution over the capsule surface is important. Advantageously, a pressure reduction can be provided. [87] It is particularly interesting in the preferred embodiment of the capsule 60 that a striking surface is provided for a decorative option. The decor can fulfill a variety of functions, such as branding, product code, advertising space, consumer information carriers, etc. Depending on the objective, there are different solutions. [88] To apply so far thought mainly of pad printing, on a labeling or painting.

[89] A decor design integrated into the capsule as a shaping element is also of great importance for the independent perception of the design.

[90] The material used for the plastic body of the capsule has by itself a high barrier resistance to the exchange of gases. When the plastic is cut open, the plastic absorbs the mixed-in color. Dark colors are a better light barrier and thus better protect the introduced Brühgut as brighter colors.

[91] The brim ensures the optimal seal of the capsule in the brewing head.

[92] The inside of the capsule wall may be coated with silicon dioxide (SiOx) plasma vapor deposition uniformly over the entire surface of the capsule to form an invisible and gas-impermeable barrier layer.

[93] The nano-layer silicon dioxide of at least 72 nm grants a flavor-proof for at least 12 months, depending on the quality claim easily up to 24 months.

[94] The sealing film of the capsule is a multilayer film and consists of three layers. In the middle of an aluminum foil is arranged. This serves as a gas barrier. To the outside of the capsule out a protective coating is arranged. This forms a printable or printed area for the naming of the product flavor and / or the company logo or other information. On the other hand, a heat-sealing lacquer is applied to the inside of the capsule on the aluminum foil. This forms a barrier between the aluminum and the introduced ground coffee. [95] Different alternatives can be considered as production methods: if a barrier layer is to be provided and if it is inside, for example, a two-component nenten- injection molding process can be applied. Either the wall is first sprayed, then the barrier layer is sprayed on. Or the barrier layer is sprayed and the wall sprayed on.

[96] An alternative to the two-component injection molding process is, for example, spraying the wall, whereupon the barrier layer can be sprayed on or plasma-coated.

[97] If the barrier layer is to be provided and is located on the outside, a two-component injection molding process is particularly suitable, in which the wall is first sprayed and then the barrier layer is sprayed on, or vice versa. As an alternative to the two-component injection molding process, the wall can first be sprayed, after which the barrier is applied using another application method, for example by means of dipping, coating or vapor deposition, etc.

[98] The ultimately resulting capsule according to the presently preferred embodiment is preferably monochrome. Outside there are three different surface structures. above are circumferential, convex surveys provided. The elevations are dull. The ridge-like valley design between the various matte elevations, so the troughs are made high gloss.

[99] The smooth logo surface is a high-gloss surface without elevations with, for example, the logo of the coffee supplier as a matt surface or, for example, as a relief. [100] Below is a smooth, high-gloss, conical round body, which should be in a circumferential, high-gloss color with final rounded effects.

[101] The inside surfaces are preferably all high-gloss.

[102] All edges are preferably equipped with a rounding of at least 0.1 mm radius. The sealing film should have the same color to the outside as the capsule body. The brand logo of the coffee supplier can be imprinted. [103] A continuous wall thickness of about 0.5 mm and a maximum chromatic strength of 0.6 mm is proposed and sought. In the thickness-produced tapping area on the capsule head, the wall thickness is reduced, preferably to less than 0.5 mm or less than 0.4 mm.

[104] As an independent property freely combinable with the above aspects of the invention, it is proposed that the wall thickness be reduced to less than 0.3 mm, preferably to about 0.2 mm or less.

[105] The capsule of Figure 6 carries the presently preferred dimensions of the embodiment, but it should be clearly emphasized that the dimensions given there can all be changed. The invention is not only realized when the local dimensions are used. This means that individual dimensions, several dimensions or all dimensions can be changed relative to the illustration shown in FIG.

The capsule base 71 in FIG. 7 consists essentially of a brim 72 to which a closure foil (not shown) is attached to a lower side 73. The sealing ridge 75 is located closer to a capsule wall 77 than on the sealing ring 76, preferably even directly on a transition region 78 between the capsule wall 77 and the at least substantially horizontally extending on an upper side 74 of the rim 72 Surface of the brim 72.

[107] Two flanks 79, 80 of the sealing ridge 75 are each tilted by about 7.125 ° with respect to a vertical, with the opposite sign, the vertical lying parallel to a capsule extension axis 81 (not to scale).

[108] The two identical capsules 82, 83 in FIG. 8 are stacked directly on top of one another as an example of empty capsules made of bars. In the upper region of the outer capsule 83, a capsule wall 84, in spite of above and below respectively constant and ideally equal wall thicknesses 85, 86, serves as a staple nose serving inwards in the form of a stacking ring 87.

It should be pointed out that the withdrawal of the capsules 82, 83 can be impeded by a return oriented toward the capsule head. Remedy for example, a waiver of recesses above the stacking nose; or it can be tangential from a shape extending contour component can be omitted, and arranged for example in the longitudinal direction of the capsule ribs 89, 89 'or studs 89 "(each shown as a dashed line as an example, but preferably provided as a plurality) can be seen before, whose lower end 90, 90' 90 "in this case would serve for seating on an internally stacked capsule.

[110] If such a stacking rib 90 'extends to the transition between the capsule wall 84 and the capsule head 91 and ideally passes directly into an inner side 92 of the capsule head 91, then, with a suitable design, any return beyond the stacking rib is eliminated, so that removal from the mold is facilitated. [Π 1] The drawing shows in various figures and embodiments, a small selection of possible variants of the invention. It should be emphasized that although the features contained therein can be used to specify the subject matter more precisely, these are not necessarily to be understood as limiting. All measures are pure embodiments, which are therefore also not to be understood as mandatory values.

Claims

A capsule as a container for receiving a Brühguts such as coffee, tea and the like, and for brewing in the capsule with addition of a brewing medium, in particular hot, almost boiling or boiling water, the capsule capsule head for the passage of a perforator for adding or leaving, depending according to the intended flow direction of the capsule in a brewing machine, the brewing medium, further comprising a closed with a bottom closure, especially a bottom foil, capsule capsule, and having a capsule wall which extends from the capsule head to the capsule foot, preferably with a see at least substantially frustrokoni or otherwise tapering from the capsule foot to the capsule head, wherein the capsule is preferably filled with the brewing material, characterized in that the capsule head and / or the capsule wall and / or the capsule base, in particular a arranged on the capsule rim brim, have a plastic, namely

Polybutylene terephthalate PBT) and / or a plastic from the PBT family and / or

• the plastic has two, three, four, five, six, seven, eight, nine, ten, eleven, twelve, 13, 14, 15 or all 16 of the following properties:

Viscosity number 80 to 100, especially 83 to 93, especially about 88 cm ³ / g, according to test standards ISO 307, 1157, 1628, with a solution of 0.005 g / ml of phenol 1.2 dichlorobenzene 1: 1; o water absorption (saturation in water at 23 ° C) 0.3 to 0.7%, especially about 0.5%, according to test standard ISO 62 (analog); o Moisture absorption (saturation in normal climate with 23 ° C and 50% relative humidity) 0.2 to 0.3%, especially about 0.25%, according to test standard ISO 62 (analog); o melt volume rate MVR (at 250 ° C and 2.16 kg) from 90 to 130, in particular 100 to 120, especially about 1 10 cm ^3/10 min, according to ISO 1133 test standard. o melt temperature range for injection molding between 235 and 285 ° C, especially between 245 ° C to 275 ° C or within this interval; o mold temperature range for injection molding between 35 ° C and 80 ° C, especially from 40 ° C to 70 ° C or within this interval; o Tensile E-modulus 2,100 to 3,100 MPa according to ISO 527-1 / -2 (1 mm / min), especially 2,200 to 2,600 MPa, in particular about 2,400 MPa; o yield stress 51 to 61 MPa, above all about 56 MPa, according to ISO 527-1 / -2 (50 mm / min); o elongation at break 1.8% to 2.8%, especially about 2.3%, according to ISO 527-1 / -2 (50 mm / min); Nominal breaking elongation 10% to 18%, especially about 14%, according to test standard 527-1 / -2 (50 mm / min); o Charpy impact strength (at 23 ° C) 112 to 132 kJ / m ² , in particular about 122 kJ / m ² , according to test standard ISO 179/1 eU; Charpy notched impact strength (at 23 ° C.) 2.7 to 3.7 kJ / m ² , preferably 3.0 to 3.4 kJ / m ² , especially about 3.2 kJ / m ² , according to test standard ISO 179 / leA; HDT-A value (heat resistance under bending stress of maximum 1.8 N / mm ² ) 49 to 59 ° C, especially about 54 ° C, according to test standard ISO 75-1 / -2;

HDT-B value (heat resistance under bending stress of maximum 0.45 N / mm ² ) 112 to 152 ° C, better 127 to 147 ° C, even better 132 to 142 ° C, especially about 137 ° C, according to ISO test standard 75-1 / -2;

Vicat softening temperature 201 to 231 ° C, more preferably 206 to 226 ° C, especially about 216 ° C, according to test standard ISO 306 (VST / A 50, 10 N, 50 K / h); and or

Vicat softening temperature 165 to 195 ° C, better 170 to 190 ° C, especially about 180 ° C, according to test standard ISO 306 (VST / B / 50, 10 N, 50 K / h).

Capsule according to claim 1, characterized in that the capsule head and / or the capsule wall and / or the capsule base, in particular a arranged on the capsule rim brim, a ball pressure-hardening of the plastic degrading modification in the form of an admixture.

Capsule according to claim 1 or 2, characterized in that the modification, in particular the admixture, comprises a thermoplastic elastomer, preferably thermoplastic rubber (TPK).

Capsule according to one of claims 2 or 3, characterized in that the admixture with the plastic is processed to a homogeneous mixture.

Capsule according to claim 1, characterized in that the capsule head and / or the capsule wall comprises a gas barrier material, in particular in the form of an admixture, wherein the gas barrier material reduces a gas passage of oxygen relative to the plastic.

6. Capsule according to claim 5, characterized in that the gas barrier material comprises silicon, in particular silicon dioxide, and / or that the gas barrier material comprises a Mischpolyamid and / or that the gas barrier material is applied by means of an alcoholic solution, especially sprayed or applied in a dip bath, and / or that the plastic is formed as a wall, wherein the gas barrier material is arranged as a barrier layer on a wall as a surface coating, and directed to an outside and / or inside of the capsule out.

7. Capsule according to claim 6, characterized in that the surface coating covering the entire surface to the inside and / or outside and / or that the surface coating has a layer thickness of at least 30 nm or 40 nm, preferably of at least about 70 nm , in particular an average layer thickness of 70 nm to 75 nm, and / or that the surface coating is a plasma evaporation layer.

8. capsule as a container for receiving a Brühguts such as coffee, tea and the like, as well as for brewing in the capsule on addition of a Brühmediums, especially hot, almost boiling or boiling water, the capsule capsule head for the passage of a perforator for adding or leaving , depending on the intended flow direction of the capsule in a brewing machine, the brewing medium, further comprises a closed with a bottom closure, especially a bottom foil, closed capsule foot, and having a capsule wall which extends from the capsule head to the capsule foot, preferably at least substantially frustroconical or tapered from the capsule foot to capsule head shape, wherein the capsule is preferably filled with the brewing material, in particular capsule according to one of the preceding claims, characterized in that the capsule head has a head portion extending flat on the capsule base, the head portion being formed continuously closed, in particular with a wall thickness of at least about 0.3 mm or at least about 0.35 mm, within the head portion weakened area is provided, which has a smaller wall thickness.

A capsule according to claim 8, characterized in that the weakened region has a wall thickness of between about 0.15 mm and about 0.3 mm.

Capsule according to claim 8 or 9, characterized in that the weakened region both radially outwardly, ie in the direction of the capsule wall, as well as radially inward, ie towards the center of the capsule head, adjacent stronger wall thicknesses than in the weakened area finds, wherein the Weakened area preferably has a ring running around weakened in terms of wall thickness, so that guided against the weakened ring opening knife can easily pass through than by the adjacent wall thickness.

Capsule according to claim 10, characterized in that the weakened ring has a wall thickness which has less than 75% of a surrounding wall thickness, in particular less than 50%, preferably between 25% and 35%, and / or in particular between 0.1 mm and 0.3 mm, especially about 0.15 mm to 0.25 mm, wherein the surrounding wall thickness may preferably be between 0.3 mm and 1 mm, in particular between 0.35 mm and 0.7 mm, especially about 0 , 5 mm. Capsule according to claim 10 or 11, characterized in that standing on the capsule base capsule an orthogonal through the weakened ring occupies an acute angle of less than 30 ° relative to the vertical, preferably about 15 ° to 25 °. 13. Capsule according to one of claims 8 to 12, characterized in that the weakened region, in particular the weakened ring, one from radially outside and / or one coming from radially inside, preferably annular, wall thickness tapering on an inner side of the head portion, whereas an outer surface of the head region, a surface at a boundary, preferably at all boundaries, of the weakened area passes flush, so that the smaller wall thickness is not visible in the weakened area from the outside.

A capsule as a container for receiving a Brühguts such as coffee, tea and the like, and for brewing in the capsule with addition of a brewing medium, in particular hot, almost boiling or boiling water, the capsule capsule head for the passage of a perforator for adding or leaving, depending according to the intended flow direction of the capsule in a brewing machine, the brewing medium, further comprising a closed with a bottom closure, especially a bottom foil, capsule capsule, and having a capsule wall which extends from the capsule head to the capsule foot, preferably with a see at least substantially frustrokoni or a shape tapering from the capsule foot to the capsule head, wherein the capsule is preferably filled with the brewing material, in particular capsule according to one of the preceding claims, characterized in that the capsule head as a whole is dome-like curved, wherein a central region may be flat, also dome-shaped or in particular lower-shaped, wherein the dome shape is spherical.

15. Capsule as a container for holding a Brühguts such as coffee, tea and the like, as well as brewing in the capsule with the addition of a Brühmediums, especially hot, almost boiling or boiling water, the capsule head for the passage of a perforator for adding or capsule Depending on the intended direction of flow of the capsule in a brewing machine, the brewing medium has a capsule, and has a capsule wall which extends from the capsule head to the capsule root, preferably with at least one essential frustrokoni see or tapered from the capsule foot to capsule head shape, the capsule is preferably filled with the broth, in particular capsule according to one of the preceding claims, characterized in that the capsule head has a standing on the capsule foot capsule flat head region, wherein d he head has a plurality of grooves with a radial course direction component, in particular a plurality of radially arranged grooves.

16. A capsule according to claim 15, characterized in that the grooves continue around a transition edge from the head area to the capsule wall, wherein preferably grooves on the capsule wall are provided on the outside, the capsule wall but is smooth to an inside of the capsule. Capsule according to claim 15 or 16, characterized in that the grooves within the head area avoid a puncture area with a smooth surface.

Capsule as a container for receiving a Brühguts such as coffee, tea and the like, and for brewing in the capsule with addition of a brewing medium, especially hot, almost boiling or boiling water, the capsule capsule head for the passage of a perforator for adding or leaving, depending according to the intended flow direction of the capsule in a brewing machine, the brewing medium, further comprising a closed with a bottom closure, especially a bottom foil, capsule capsule, and having a capsule wall which extends from the capsule head to the capsule foot, preferably with a see at least substantially frustrokoni or otherwise tapering from the capsule foot to the capsule head, wherein the capsule is preferably filled with the broth, in particular capsule according to one of the preceding claims, characterized in that the capsule has a responder for an electronic communication unit, so that in a Brühmasch Ine arranged communication unit can receive wireless information from the capsule, wherein the responder

• Has a wireless readable data memory, in particular a bar code carrier or a resonant circuit, especially an RFID chip; and or

• Readable for an inductive sensor, to which the responder has an electrically conductive admixture for the plastic of the capsule and / or has a conductor layer, especially a metallic fleece or knitted fabric.

19. Capsule as a container for holding a Brühguts such as coffee, tea and the like, and for brewing in the capsule with the addition of a Brühmediums, especially hot, almost boiling or boiling water, the capsule capsule head for the passage of a perforator for adding or leaving , depending on the intended flow direction of the capsule in a brewing machine, the brewing medium, further comprises a closed with a bottom closure, especially a bottom foil, closed capsule foot, and having a capsule wall which extends from the capsule head to the capsule foot, preferably at least substantially see frustrokoni or tapered from the capsule foot to the capsule head shape, wherein the capsule is preferably filled with the brewing material, in particular capsule according to one of the preceding claims, wherein the capsule foot has an annular disc-shaped brim, wherein a

Top of the brim, thus the capsule head facing side of the brim, designed as a sealing surface for cooperating with a sealing ring of a brewing machine, characterized in that the top has a web seal in the form of an annular elevation, which is arranged radially within a radially outer edge of the brim , Preferably closer to the capsule wall than at the outer edge, wherein preferably at the brim, a second annular elevation is provided, in particular at the outer edge of the brim.

20. Capsule according to claim 19, characterized in that the web seal protrudes higher from the brim than the second annular elevation.

21 capsule as a container for receiving a Brühguts such as coffee, tea and the like, and for brewing in the capsule with the addition of a Brühmediums, especially hot, almost boiling or boiling water, the capsule a capsule head for the passage of a perforator for adding or leaving , depending on the intended flow direction of the capsule in a brewing machine, the brewing medium, further comprises a closed with a bottom closure, especially a bottom foil, closed capsule foot, and having a capsule wall which extends from the capsule head to the capsule foot, preferably at least substantially see frustrokoni or tapered differently from the capsule foot to the capsule head, wherein the capsule is preferably filled with the brewing material, in particular capsule according to one of the preceding claims, characterized in that the capsule wall has on its surface facing the outside beads or waves, which only üb he a part of the capsule wall height extend.

22. Capsule according to claim 21, characterized in that standing on the capsule base capsule, a vertical, central axis of rotation of the capsule body exists, on which the beads or waves can be projected.

23. Capsule as a container for holding a Brühguts such as coffee, tea and the like, and for brewing in the capsule with the addition of a Brühmediums, especially hot, almost boiling or boiling water, the capsule capsule head for the passage of a perforator for adding or leaving , depending on the intended flow direction of the capsule in a brewing machine, the Brühmediums further comprises a closed with a bottom closure, especially a bottom foil, capsule capsule, and having a capsule wall which extends from the capsule head to the capsule foot, preferably with an at least substantially frustrokoni see or tapered from the capsule foot to the capsule head shape, wherein the capsule is preferably filled with the brewing material, in particular capsule according to one of the preceding claims, characterized in that the capsule wall has a lower frustroconical region and an upper frustro- conical region, wherein the upper frustrokoni see range has a steeper wall slope than the lower Frustrokoni see range, preferably between the two frustrokonischen areas a jump is arranged, which transfers an upper end of the lower frustrokonischen range to a lower end of the upper frustrokonischen range, particularly preferably designed as Frustrokoni shear Rin G.

24. capsule according to claim 23, characterized in that the capsule wall has three frustronische areas, namely the lower frustrokonischen area, the upper frustrokonischen area, possibly a Versprung therebetween, and standing on the capsule pedestal capsule additionally a third frustrokonischen area below the lower frustrokonischen area, wherein preferably the lower frustrokoni see area has a steeper wall slope than the third frustrokonische area.

25. capsule as a container for holding a brewing product such as coffee, tea and the like, as well as for brewing in the capsule upon addition of a brewing medium, in particular special hot, almost boiling or boiling water, the capsule having a capsule head for the passage of a perforator for adding or leaving, depending on the intended flow direction of the capsule in a brewing machine, the brewing medium, further comprising a bottom closure, especially a bottom sheet, having closed capsule base, and having a capsule wall which extends from the capsule head to the capsule foot, preferably with an at least substantially frustrokoni see or tapered capsule from capsule head tapered shape, wherein the capsule foot has a circumferential brim, which on its at Capsule standing capsule upwardly facing side has a seal with an there coming from a brewer coming annular plunger, the capsule is preferably filled with the brewing, in particular capsule according to one of the preceding claims, characterized in that the Dichtu ng has a sealing strip running all around, wherein the sealing web has two flanks and a tip in a radial cross-section relative to the capsule, wherein both flanks are inclined, the tip is flat.

26. Capsule according to claim 25, characterized in that both flanks of the sealing web in cross section have the same inclination.

27. capsule according to claim 25 or 26, characterized in that the tip is formed as a plane, which preferably extends in cross section at least substantially horizontally and parallel to a clamping plane of the brim.

28. Capsule according to one of claims 25 to 27, characterized in that the sealing web at the outlet from the brim has a radial width of approximately between 0.35 mm and 0.60 mm, especially of approximately between 0.40 mm and 0.50 mm, in particular of about 0.44 mm.

29. Capsule according to one of claims 25 to 28, characterized in that the sealing web with respect to the brim with its tip has a height of approximately between 0.5 mm and 0.7 mm, in particular of about 0.6 mm.

30. Capsule according to one of claims 25 to 29, characterized in that the sealing web protrudes with its tip in cross section higher than the brim as an additionally provided, arranged at the radially outer end of the rim around the second sealing ring, wherein the sealing ring preferably at least that side of the brim on which the sealing ridge is arranged has a substantially round cross-sectional shape.

31. capsule according to claim 30, characterized in that the sealing web projects beyond the sealing ring in height by between about 0.2 mm and 0.32 mm, in particular by about 0.26 mm.

32. Capsule according to one of claims 25 to 31, characterized in that the sealing web has at the transition from the flanks to the top rounding, in particular with a radius of about 0.05 mm.

33. Capsule according to one of claims 25 to 32, characterized in that the flanks are inclined at least over part of their courses in cross section at the same angle to the vertical.

34. Capsule according to one of claims 25 to 33, characterized in that the flanks are inclined in cross section with respect to the vertical at an angle of approximately between 5 ° and 10 °, in particular from approximately between 6 ° and 8 °, especially about 7.125 °. Capsule according to one of claims 25 to 34, characterized in that the sealing web is formed integrally with the brim.

A capsule as a container for receiving a Brühguts such as coffee, tea and the like, and for brewing in the capsule with addition of a brewing medium, in particular hot, almost boiling or boiling water, the capsule capsule head for the passage of a perforator for adding or leaving, depending according to the intended flow direction of the capsule in a brewing machine, the brewing medium, further comprising a closed with a bottom closure, especially a bottom foil, capsule capsule, and having a capsule wall which extends from the capsule head to the capsule foot, preferably with a see at least substantially frustrokoni or differently from the capsule root to capsule head tapering shape, wherein the capsule foot has a circumferential brim, which has a sealing foil on its standing on the capsule capsule downside side, wherein the sealing film is preferably formed as a multilayer film, especially mi t an anti-oxidation sealant layer directed downward, with an inner layer comprising a metal, especially aluminum, and with a heat seal adhesive layer for entering into a connection to the plastic of the rim of the capsule, wherein the capsule is preferably filled with the brewing, in particular Capsule according to one of the preceding claims, wherein the sealing film is tightly connected to the brim by means of the heat seal adhesive.

Capsule according to claim 36, characterized in that the heat seal adhesive with the plastic of the heat sealable adhesive at a temperature between about 205 ° C and about 225 ° C, in particular between about 210 ° C and 220 ° C.

Capsule according to claim 36 or 37, characterized in that the aluminum has a grammage of 3 to 10 g / m 2, especially about 6 g / m 2.

A capsule as a container for receiving a Brühguts such as coffee, tea and the like, and for brewing in the capsule with addition of a brewing medium, in particular hot, almost boiling or boiling water, the capsule capsule head for the passage of a perforator for adding or leaving, depending according to the intended flow direction of the capsule in a brewing machine, the brewing medium, further comprising a closed with a bottom closure, especially a bottom foil, capsule capsule, and having a capsule wall which extends from the capsule head to the capsule foot, preferably with a see at least substantially frustrokoni or tapered shape differently from the capsule root to the capsule head, wherein the capsule wall in its upper third or its upper half has a wall thickness, characterized in that the capsule wall in the upper half or in the upper third inwardly from the capsule wall protruding has a staple nose, in particular ere a circumferential ring with continuous or interrupted configuration, or preferably as discrete stacking lugs or stacking ribs, especially as stacking ribs, which extend upwardly free from recesses into a capsule head.

Capsule according to claim 39, characterized in that the stacking nose has a free inner diameter, which is smaller than an outer diameter at the transition from the capsule wall to the capsule head, so that when two identical see nested capsules, the transition from capsule wall to capsule head of the inner capsule at the stacking nose of the outer capsule finds a stop.

41. Capsule according to several, in particular all, of the preceding claims.

42. Capsule according to one of the preceding claims, characterized in that the capsule is closed at its capsule foot with a sealing film.

43. A method for closing a capsule, in particular a capsule according to one of the preceding claims, at its capsule foot with a sealing film, wherein the sealing film is formed as a multilayer film, especially with an anti-oxidation sealing wax layer directed downward, with an inner layer comprising a metal, especially aluminum, and having a capsule to heat-seal adhesive layer for entering into a connection to the plastic of the rim of the capsule foot, with the steps a. Pressing the film to the brim with a force between 80 N and 140 N, better with between 100 N and 120 N, in particular with about 110 N, and b. Hold for a sealing time of between about 0.3 s and 0.7 s, in particular about 0.5 s, and c. Waiting for the sealing operation on the part of the heat-sealable adhesive at a temperature between about 205 ° C and about 225 ° C, in particular between about 210 ° C and 220 ° C, but in any case at least 205 ° C.