WO2010084176A1

WO2010084176A1 - Capsule for dispensing active ingredients

Info

Publication number: WO2010084176A1
Application number: PCT/EP2010/050733
Authority: WO
Inventors: Rolf MÜHLEMANN
Original assignee: Rm Beteiligungs Ag
Priority date: 2009-01-26
Filing date: 2010-01-22
Publication date: 2010-07-29
Also published as: CH700312A2

Abstract

The invention relates to a capsule (1) for dispensing solid, free-flowing, or liquid active ingredients (W), wherein in said capsule, a penetrating plunger (7) is attached to a curved membrane, and a chamber is formed by a capsule wall (2), said chamber being sealed by a destructible film (4) at the end of the chamber (3) opposite the membrane (6). In order to really destroy said film completely so that the active ingredient (W) can also actually escape, the penetrating plunger (7) is provided with elastic arms (71), which are angled from top to bottom and from the center to the periphery, or preferably curved. The penetrating plunger (7) comprises a stem (70), which is open in the direction away from the membrane and is sealed at the bottom by an end wall (73). The elastic arms (71), the cross-section of which is gable shaped, and also a rod-shaped spike (79) having a tip (79'') are formed on said end wall (73), wherein the rod-shaped spike first penetrates the destructible film upon actuation before the elastic arms (71) take effect with their perforation teeth and cutting edges.

Description

Capsule for the delivery of active ingredients

The present invention relates to a capsule for the delivery of solid, giant-shaped or liquid active substances, comprising a cylindrical or conical capsule wall with a lockable at its lower ends, mi t te lsei tenable membrane, wherein in the region of the upper end of the capsule wall integrally connected thereto a curved, flexible membrane is formed, on which a through-toss stamp is attached, which rests completely in the chamber before actuation of the curved membrane and partially protrudes after actuation of the chamber.

On the market capsules are increasingly offered, which contain active ingredients for the preparation of drinks. These

Active ingredients may be solid, liquid or giant

Take shape. Among the best known capsules of this type are capsules that are suitable for the preparation of coffee. Typical examples of such capsules show the EP-AO 512 468 and EP-AI 190 959. These capsules consist of a cup with a cylindrical or conical, pressure-resistant capsule wall with an integrally formed thereon Bottom or top surface and a welded over the remaining opening membrane. Such cartridges are designed for use in coffee machines, wherein in the machine, the cartridge is perforated on both sides and flows under pressure of brewed water. These capsules are extremely simple in construction, as all means of opening the capsule are included in the machine to be used. Much more complex are closures of various kinds, which have a storage space, which serves as a capsule, and from which a solid, liquid or giant-shaped active substance is to be dispensed into a container on which the closure is attached. For example, one of the oldest closures of this type shows document GB-A-1193989. Here, a slip-on collar is mounted on a container neck having an inner, upstanding, cylindrical wall, this wall being formed as a closed cylinder in which a hollow plunger, filled with the corresponding active substance, is stored. Above the piston cylinder part a separate protective cap is placed. A closure of this type has many individual parts and the corresponding assembly and filling is not possible with conventional filling machines. A very similar system is also known from WO-A-03093128. Although in this integrated chamber closure as well as in the previously described decision, after the delivery of the active ingredient, the capsule, consisting of the piston and cylinder unit, must be removed. A somewhat different system is shown in US-A-6886686. Again, a separate chamber is present by a ram stores, which must be pressed down. The cylinder of the capsule is provided with an openable bottom to which the plunger is attached. Again, the capsule has a movable, designed as a flying piston part, which acts on the plunger and this in turn pivots the bottom partially to the side. This capsule, which is made up of a piston and cylinder unit, in turn requires an assembly which can not be carried out on today's bottling plants. In addition, the capsule must first be filled, which would be possible with today's usual bottling plants, but the insertion of the corresponding piston on the already filled capsule can not perform according to this view without causing a significant air entrapment, these air are compressed would and may unintentionally open the bottom of the capsule. Without special, not shown here vent such a capsule can not be closed. Furthermore, such a capsule is in turn only usable on certain bottles and further, the flying piston is not secured, so that such a capsule for free transport is unsuitable. However, this is also not provided, since in itself this capsule system is always offered with an associated container. More and more food, pharmaceuticals, cosmetics, adhesives and detergents as well as other substances, all of which are referred to as active ingredients, are offered in highly concentrated form. This has the advantage that this reduces the packaging sizes, the transport costs can be reduced and consequently the packaging costs are reduced. The disadvantage, however, is that all of these active ingredients must be added in a highly concentrated form later in the required amounts of use and in a metered manner a liquid, in the broadest sense a solvent, must be added. In many cases, consumers are insufficiently aware of the indications regarding the dossier quantity and tend to give a much higher concentration than required. This is not conducive to the final product to be produced and the consumer notices that the product purchased in concentrated form ultimately costs him more than if he had bought the ready-made, diluted product. This has meant that the concentrated form of such agents has not prevailed in the mass, as would be desirable in itself.

Accordingly, it has gone over to offer these concentrated Wirkstof fe in pre-dosed quantities. In the case of pu 1 verfi rmi gene active ingredients, this takes the form of

Tablets, capsules or dragees. Not all powdered However, drugs are suitable to be given in tablet form. Even if such agents are delivered in the predetermined portions, then the corresponding liquid portions are missing, which in turn often have to be metered mixed with the solid or powdered active ingredients.

A capsule according to the preamble of claim 1 is apparent from the document WO 2005/094196. The capsule which has been here combined with a screw cap has a cylindrical capsule wall which is closed at the lower end by means of a destructible foil and the upper end of which has a curved flexible membrane to which a piercer is attached which completely before operation of the domed membrane rests in the chamber and after the operation partially protrudes from the chamber and thereby punctures the film. The tos s stamp has a cross-shaped cross section and opens into a peak. Pressing on the arched, flexible membrane, the piercing punch will perforate the film and then cut in a cross shape. Depending on the choice of material from which the destructible film is made, this is only cut crosswise or rips out slightly. The result is that existing in powder form in the capsule material does not or only slightly flows out. The piercer virtually closes the self-cut film. Shake then the bottle on which the capsule is attached, so penetrates a certain small amount of liquid in the capsule and practically leads to sticking.

Also, a slightly differently designed capsule according to WO 2006/046730 discloses a capsule which can be screwed onto a bottle, whose lower end is sealed with a destructible foil, while the upper end has a curved flexible membrane on which in turn a piercing punch is formed. In particular, the puncture punch has a substantially cylindrical shape, the end of which is cut in an inclined manner. Upon actuation, exactly the same effect occurs as previously described. If the content of the capsule is a liquid, it may be delayed, but this again depends heavily on whether the destructible film is made of aluminum or, for example, of a plastic film. If the latter occurs, a negative pressure is likely to occur when the capsule is leaking out and the foil in turn seals against the puncture punch.

The present invention has for its object to provide a capsule as simple as possible, which can be filled and sealed on conventional filling machines and can be reliably opened with extensive destruction of the sealing destructible membrane so that it quickly and reliably emptied into the container on the he is appropriate. It is a further object of the present invention to maintain as simple a manufacture as possible.

This object is achieved by a capsule of the type mentioned, which is characterized in that the through tossstempel has at least one arm which extends from an area closer to the flexible membrane towards the destructible foil out from the axis of the punch away to the outside.

Further advantageous embodiments of the capsule are apparent from the claims.

Preferably, such a capsule has a curvature of the domed membrane superior capsule wall part, which is provided with a thread. Such a thread can on the one hand be used to form thereon a Unversehrtheits ^¬ or security element to install, which are removed prior to the operation must or this capsule wall part can senge winch with an off be provided that suitable is to be combined with a erf indungsgemässen retaining ring. This retaining ring, which forms a screw cap with the attached capsule, wherein the corresponding retaining ring is suitable for multiple use and only the screw-capsule must be replaced. Further preferred embodiments of the retaining ring will be apparent from the corresponding, dependent claims. In the drawing, two embodiments of the inventive capsule are shown by themselves and one of the two preferred embodiments in combination with the likewise inventive retaining ring. It shows:

Figure 1 shows a first embodiment of an inventive capsule for direct use in a diametrical vertical section and

Figure 2 shows a second embodiment of an inventive capsule which can be screwed in a collar fastened in a side view.

FIG. 3 shows a further variant of a capsule according to the invention in a vertical diametric section with a retaining ring attached thereto and FIG

FIG. 4 shows a detail from FIG. 3 on a larger scale.

Figure 5 shows this capsule with retaining ring in a view obliquely from above, while Figure 6 shows the capsule with the retaining ring in the view from below with omission of the membrane.

Figure 7 shows a diametrical section of a capsule according to Figure 2 as a two-part screw cap and

FIG. 8 shows a partial section through a retaining ring on the screw closure according to FIG. 7

Figure 9 shows a plan view of the end of an arm with a central cutting edge and

10 shows a diametrical, vertical longitudinal section through a capsule with cutting as shown in Figure 9.

The capsule itself is designated overall by the reference numeral 1. The capsule 1 has a capsule wall 2. This capsule wall 2 is preferably, but by no means mandatory, designed cylindrical. Here, it is preferable to provide at least the outside of the capsule wall with a slightly conical suit to achieve improved demolding. Thus, the outside of the capsule wall 2 in the upper region will have a slightly larger diameter than in the lower region. This capsule wall is closed in the upper region 5 by a flexible, arched membrane 6, which is integrally formed on the inside of the capsule wall. This forms below the flexible, domed membrane 6 a chamber 3. Looking at the capsule 1 from the open lower side so it thus forms a kind of cup whose bottom in this case, the flexible, domed capsule membrane 6 is. Such a cup can be easily filled on conventional filling systems with any active ingredient W. This active substance can be filled into the chamber 3 in liquid, solid, for example several tablets, flowable or in a giant-shaped form. Anschleissend can be closed by means of a destructible film 4 on the conventional filling the chamber 3.

The destructible film may be in the form of a plastic film or an aluminum foil or even a dense one

Be designed paper sheet. This film can also be welded on conventional filling equipment or stick.

The integrally formed capsule wall 2 with the flexible, convex membrane 6 and the molded-on punch 7 can be manufactured in one piece by injection molding technology. For special agents, it is also possible the entire part or at least the capsule wall 2 with the flexible, convex membrane 6 directly provided with a barrier layer, injection molding technology to manufacture.

In the embodiment as shown in Figure 1, a holding lug 11 is formed in the upper region 5 on the capsule wall 2 at least at two opposing areas. Thanks to these retaining lugs 11, which are curved on its underside, the capsule 1 can be similar to a hypodermic syringe. On the upper edge 12 of the capsule wall 2 an integrity or security element 8 is applied. This security element 8 can be welded or glued. Prior to actuation of the capsule, this integrity or safety element 8 must be removed. For this purpose, this integrity or security element 8 has a tab 13, as can be seen, for example, from FIG. This advantageous tab 13 facilitates the removal of the security element eighth

Before the first actuation, the flexible, curved membrane 6 is curved upward in the direction of the upper edge 12. However, the membrane 6 does not project beyond this upper edge 12 of the capsule wall 2. On its underside, as already mentioned, the puncture punch 7 is formed. In the position shown here before the first use of the puncture punch 7 is completely within the chamber 3. In the first operation pierces the puncture punch 7 the destructible film 4 and then projects beyond the lower edge 14 of the capsule wall 2 to the outside. The cross-sectional shape of the puncture temple 7 will be adapted to the chosen material of the destructible film 4 to be sure that this film is destroyed as much as possible, and thus the content, namely the active ingredient W, can safely get out of the chamber 3.

In contrast to the first embodiment in FIG. 1, in the second embodiment according to FIG. 2 the upper end region 5 of the capsule wall 2 tapers in diameter, so that a shoulder 15 is formed here. The upper end region 5 thus has a smaller external diameter than the lower area of the capsule wall 2. In the upper end region 5 of the capsule wall 2, an external thread 9 is formed here. Otherwise, however, the capsule 1 is designed the same in its basic structure. The dashed lines drawn flexible, domed membrane 6 is also present as the molded thereon punch 7 with its perforating tip 10. At the bottom of the capsule wall 2, a destructible film 4 and a non-removable lid is attached here in the filled state. The upper end, that is, at the upper edge 12 of the capsule wall 2, an integrity or security element 8 is attached here, for example, a film with a tear-off 13. Thanks to the external thread 9 can for improved protection even on the film another integrity or Security element 8 are screwed in the form of a cap.

However, the external threads mounted on the outside of the capsule wall 2 in the upper end region 5 essentially serve to provide the capsule 1 with a retaining ring. This retaining ring has been designed in accordance with the screw according to the embodiment of FIGS. 3 to 6, but formed as a separate element, as shown in FIGS. 7 and 8. On the upper end region 5 here also inventive retaining ring 20 is screwed onto the external thread 9. Accordingly, the retaining ring 20 has an internal thread 21. This internal thread 21 is integrally formed on an inner annular wall 22 which has a shoulder 23 in the lower region. This paragraph 23 comes in fully screwed state of the retaining ring 20 on the capsule 1, on the shoulder 15 to rest. The inner annular wall 22 merges at its upper end into an approximately horizontal, annular top surface 24. This top surface 24 is finally connected to a circumferential jacket wall 25 in connection. This circumferential jacket wall 25 has an internal thread 21. The internal thread 21 serves to be screwed onto a container, for example a drinking bottle or another type of bottle. Since this bottle in the broadest sense can contain a solvent and you want to ensure that is not unauthorized in it something is added that should not, you will advantageously on the jacket wall 25 via predetermined breaking points 26 integrally attach a guarantee strip 27, which is provided with retaining ridges 28.

So that the retaining ring 20 sits on a bottle really sealing, 24 sealing elements may be provided on the underside of the annular top surface. Between the inner annular wall 22 and the peripheral jacket wall 25, an annular wall may be provided which has a thickening in cross-section and is referred to in the jargon as a sealing olive 29. Furthermore, between the sealing olive 29 and the jacket wall 25, a circularly extending sealing lip 29 'may be provided, which sealingly comes to lie on the end face of the bottle neck.

The embodiment shown in FIGS. 3 to 6 shows a capsule 1, which is here designed as an integral part of a screw cap 1 '. As already described above with reference to FIGS. 7 and 8, a retaining ring is also present here, which, however, is connected in one piece to the capsule 1 or to the capsule wall 2. The jacket wall 25 is also provided here with an internal thread 21 and the horizontal, annular top surface 24 now passes directly into the capsule wall 2, which forms the chamber 3. Within the capsule wall in turn the curved membrane 6 is present at the bottom of a piercing punch 7 is formed. At the Mantle wall 25 is here also on predetermined breaking point bridges 26 a guarantee strip 27 formed.

The essential feature of the invention consists in the fact that the piercing punch 7 is provided with at least one arm 71, which extends outwardly away from the central axis of the punch 7 and terminally preferably has at least one perforating tooth 77, 78 '. The punch 7 has a stem 70. This stem 70 is formed on the curved membrane 6. In the preferred embodiment, this stem 70 is open from the domed diaphragm 6 and, accordingly, a cavity 72 is formed in the stem 70 of the piercing punch 7. This cavity 72 is located at the terminal end of which the domed membrane 6 is remote from an end wall 73 or concave surface closed. This cavity 72 is preferably cylindrical. Accordingly, the wall 72 'defining the cavity 72 is cylindrical. All means of destruction of the destructible membrane 4 are formed on the trunk 70 or the end surface thereof. These means consist of the already mentioned arms 71 and also of a rod-shaped mandrel 79. A certain elasticity of these arms 71 is always given in a production of plastic and also quite advantageous, since this promotes the tearing of the film. Even with practically rigid materials, the arms 71 function properly. But since the material is almost always is elastic and the capsule made of plastic, is subsequently spoken by elastic arms 71.

The elastic arms 71 extend inclined with respect to the axis of the through tos ss temple 7 of this outward away. In principle, these arms 71 may be designed to be straight, but this would lead to a kind of kink in the attachment area of the end wall 73. For manufacturing reasons, this is disadvantageous. In manufacturing, one will work with a two-part core, with an inner, first extractable core part of the injection mold forming the underside of the elastic arms 71 and the rod-shaped mandrel 79, while the second part of the withdrawable core of the injection mold forms the top of these arms and upon withdrawal this core part, the arms 71 to the rod-shaped mandrel 79 bend so that they are in the short term practically in alignment with the wall 72 'of the cavity 72. When the core of the injection molding tool is fully withdrawn, these resilient arms 71 spring back to the shape in which they were made and as shown in the drawing. Here it should be pointed out briefly that in Figures 3 - 6, the destructible sheet 4 is not shown, but can be seen on the capsule wall 2 at the lower end-side end as well as at the upper end end in each case a circumferential welding lug 30 or 30 '. This is used to weld a destructible film 4 for closing the chamber. 3 or to close the access to the curved membrane 6 before the first operation.

The elastic arms, in the preferred embodiment, are four elastic arms distributed uniformly around the circumference, which extend in an arched manner away from the end wall 73 and downwardly towards the capsule wall 2. These elastic arms 71 have a gable shape in cross section. They are thus formed by two v-shaped arched roof surfaces 74 which are connected to one another in the region of a correspondingly arched ridge 75. The ridge 75 is aligned in the connection point on the puncture punch 7 and on the cylindrical wall 72 'of the trunk 70 with this wall. The elastic arms 71, which are in cross-section, can be designed such that the two roof surfaces 77 are shaped as projecting cutting edges 76 at least in end regions, and these cutting edges 76 or the roof surfaces 74 end at an acute angle and thus form the Ends perforating teeth 77.

Between the two arched or arcuately peripherally outwardly extending roof surfaces 74, as shown here, in addition to the ridge 75 in the bisecting plane extending between the two roof surfaces extending another cutting edge 78 may be formed, which ends in a pronounced perforating tooth 78 '. The solid-state temple 7 is preferably provided with a rod-shaped mandrel 79, which is formed on the end wall 73 of the stem 70. This rod-shaped mandrel 79 is here formed of two vertically intersecting walls 79 ', which is designed in the extension of the section line of these two walls 79' to a tip 79 ''. This tip 79 '' thus forms another perforating tooth. This tip 79 '' forms that part of the piercing punch 7 or of the rod-shaped mandrel 79 closest to the foil to be destroyed. The ends of the elastic arms 71 or of the perforating teeth 78 'formed thereon are therefore situated somewhat further away from the foil to be destroyed.

As tests have shown, thanks to this embodiment of the capsule according to the invention it is possible to achieve a perfect, almost complete destruction of the destructible foil. When exerted pressure on the curved membrane 6 is the

Druchstossstempel 7 moves down and bumps with the

Tip 79 '' on the film and perforates it. Subsequently, the two intersecting walls 79 'intersect the film at right angles. Now meet the perforating teeth 78 'on the elastic arms 71 on the destructible film and perforate it, the pressure occurring here depending on the resistance the destructible film applies bulge more or less far outward and thereby cut the film running outward , The elastic

Arms 71 then spring back and destroy with their Cut 76, cutting the foil inwards. The film remains stretched so that the cuts formed continue to tear. The destructible film tears in a star shape, so that the giant 1 f ähi ge, liquid or flowable material within the chamber 6 can flow practically unhindered. In order to favor this effect of the star-shaped tear, the perpendicularly intersecting walls 79 'of the rod-shaped mandrel 79 are laid so that they practically run on the angle bisector between the elastic arms 71.

Although good results can probably already be achieved with a single elastic arm, it is preferable to provide at least three, but most preferably four, crosswise arranged elastic arms.

In the present construction, efforts are made to open the film as much as possible, so that the entirety of the powdered capsule contents flows out with certainty. Although tests have shown that this result can also be achieved in the previous solutions, it can happen that parts of the film to be cut are separated by the elastic arms from those parts of the film which lie directly in the region of the arms and practically between the arms and the rod-shaped mandrel 79 jam and subsequently fall into the container. This one wants to prevent however. In the figure 10 a solution is shown accordingly, by means of which this problem can be solved properly. Again, the basic structure is the same as previously described. The capsule 1 in turn has a capsule wall 2, which defines a chamber 3, which is mounted on the underside by means of a destructible foil 4 after filling the chamber 3 and in the upper end region 5 a curved membrane 6. Likewise, a puncture punch 7 is present merges into a rod-shaped mandrel 79 and a tip 79 '' has. The tip 79 '' also projects downwardly with respect to the elastic arms 71 and will first pierce the film 4 upon actuation by pressure on the domed membrane 6.

What is new here is that between the elastic arms 71 and the rod-shaped mandrel 79 flexible walls 80 are integrally connected thereto spanned. These flexible walls 80 terminate in arcuate cutting edges 81 extending from the tip 79 '' to the extremities of the resilient arms 71. This arcuate curve of the cutting edges 81 is chosen so that under maximum load of the flexible arms 71, which are bent slightly upwards, the curve is practically rising from the top 79 "which is at the bottom, continuously rising to the outermost points of the flexible arms run. This ensures that a star-shaped cut is cut in the destructible foil 4 and so on forming four tongues of the destroyed foil are pressed down by the arms. This avoids that the film is destroyed in smaller sub-film sections, which could fall into the container on which the capsule is mounted. Furthermore, these flexible walls 80 cause the arms 71 can not be bent over a certain degree upwards.

At the same time, the end wall 73 of the trunk 70 is pulled concavely downwards in order to improve the connection with the flexible walls 80 on the one hand, and on the other hand to reduce the cost of materials, while at the same time avoiding large accumulations of material which can lead to unsightly sink marks.

Also, this version can already be seen from the drawing, with the exception of the destructible film 4 completely in one piece made of plastic. In the production situation, the curved membrane 6 is formed curved downwards and the flexible arms 71 project completely down beyond the edge of the capsule wall 2. Upon demolding from the tool, the elastic arms 71 are deformed inwardly toward the rod-shaped mandrel 79, and if the capsule of the present invention is provided with the above-described flexible walls 80, it remains between the arms 71 and the rod-shaped mandrel 79 enough room that the walls 80 are inside this room can temporarily fold to then be able to feather outwards in the position shown here at the complete final shaping. It is quite conceivable that even when demolding from the injection mold at the same time tos ss temple 7 is pushed upwards, so that subsequently no separate handling is required to bring the capsule in the starting position for filling and sealing.

Reference sign list:

I capsule

1 'capsule as screw cap 2 capsule wall

3 chamber

4 destructible foil

5 upper end area

6 curved diaphragm 7 puncture punches

8 Integrity or security element

9 external thread

10 perforating point

II retaining neck 12 upper edge

13 tab 15 shoulder

20 retaining ring 21 internal thread

22 inner ring wall

23 paragraph

24 horizontal, annular top surface

25 Mantle wall 26 predetermined breaking point bridges

27 guarantee band

28 retention beads 29 sealing olive 29 'sealing lip

30 welding nose

70 stem of the punch 7

71 elastic arm

72 cavity in the trunk 72 'wall

73 end wall of the trunk 74 inclined and curved roof surface of an elastic arm

75 arched ridge

76 cutting

77 perforating tooth on cutting

78 additional cutting edge between roof surfaces 74 78 'perforating tooth on cutting edge 78

79 rod-shaped thorn

79 'Walls of the rod-shaped mandrel 79' 'Tip of the rod-shaped mandrel

80 flexible walls 81 cutting edges of the flexible walls

W active ingredient

Claims

claims

Capsule (1) for the delivery of solid, giant-shaped or liquid active substances (W), comprising a cylindrical or conical, pressure-resistant capsule wall (2) with at its lower ends, by means of a sealing destructible

Foil (4) lockable chamber (3), wherein in the area

(5) of the upper end of the capsule wall (2) integral therewith a curved, flexible membrane (6) is integrally formed on which a piercing punch (7) is mounted, which before actuation of the curved membrane (6) completely in the chamber ( 3) rests and after the actuation partially out of the chamber (3), characterized in that the piercing punch (7) has at least one arm (71) extending from an area closer to the flexible membrane (6) to the destructible foil (4) out to the outside from the axis of the punch (7).

2. Capsule (1) according to claim 1, characterized in that the punch (7) has a stem (70) which is of the

Membrane (6) ago open and hollow (72) is designed and at the bottom of the destructive film (4) directed towards a side wall (73) closed side of the trunk is provided with a plurality of preferably elastic arms (71).

3. capsule (1) according to claim 1, characterized in that on the end wall (73) a central rod-shaped mandrel (79) having a terminal tip (79 '') is formed as a perforation tooth, which projects further down than the elastic arms (71).

4. capsule (1) according to claim 2, characterized in that the plurality of molded elastic arms (71) all arched from the region of the end face (73) arcuately outwardly curved peripheral.

A capsule (1) according to claim 4, characterized in that the elastic arms (71) have a gable-shaped cross-section, and consequently have two curved roof surfaces (74) and a curved ridge (75).

6. capsule (1) according to claim 5, characterized in that the gable-shaped in cross-section ends in two according to the gable shape v-shaped from the ridge (75) projecting cutting edges (76) have the ent in perforating teeth (77) ends.

7. capsule (1) according to claim 3, characterized in that between the elastic arms (71) and the rod-shaped mandrel (79) flexible walls (80) are clamped, whose lower end edges are designed as cutting edges (81).

8. capsule (1) according to claim 7, characterized in that the cutting edges (81) arcuately from the perforating tip (79 '') of the rod-shaped mandrel (79) extend arcuately to the peripheral ends of the arms.

9. capsule (1) according to claim 8, characterized in that the arcuate cutting edges (81) are designed so that deform under load of the elastic arms outwardly and the cutting edges of the tip (29 '') continuously increasing upward extend the outermost ends of the elastic arms (71).

10. capsule (1) according to claims 2 and 3, characterized in that the tip (79 '') closer to the destructible film (4) than the ends of the elastic arms (71).

11. Capsule (1) according to claim 1, characterized in that the capsule wall (2) projects beyond the curvature of the arched membrane (6).

12. capsule (1) according to claim 1, characterized in that the capsule wall (2) at an upper edge (12) has an outwardly projecting retaining lug (11), which serve as a retaining part in a one-handed capsule opening.

13. capsule (1) according to claim 1, characterized in that the bulge of the curved membrane (6) projecting portion (5) of the capsule wall (2) is arranged offset inwards, wherein a shoulder (15) is formed, and Capsule wall above the shoulder with an external thread (9) is provided.

14. capsule (1) according to claim 1, characterized in that the capsule (1) is integrally combined with a screw cap with shell wall and internal thread and the capsule has a smaller external diameter than an inner diameter of the container to which the screw cap is placed, wherein the domed membrane (6) forms a downwardly offset portion of the top surface of the screw cap.

15. capsule (1) according to claim 14, characterized in that the screw cap is designed in two parts, namely a retaining ring and the capsule insertable therein.