EP1465815A2

EP1465815A2 - Rotating closure for a container

Info

Publication number: EP1465815A2
Application number: EP02730205A
Authority: EP
Inventors: Jörg Birkmayer; Ernest E. Kraxner; Udo Suffa
Original assignee: Prof Birkmayer Gesundheitsprodukte GmbH
Current assignee: Prof Birkmayer Gesundheitsprodukte GmbH
Priority date: 2002-01-17
Filing date: 2002-04-24
Publication date: 2004-10-13
Anticipated expiration: 2022-04-24
Also published as: KR20040089114A; JP2005538900A; EP1465815B1; US20030132244A1; CZ2004875A3; AR038160A1; PL369830A1; MXPA04006908A; CA2473204A1; AU2002302572A1; ATE309149T1; BR0215525A; HUP0402641A2; RU2004124937A; WO2003059774A2; US7178683B2; DE50204907D1; HK1072760A1; ES2248555T3; WO2003059774A3

Abstract

The invention relates to a rotating closure for a container, comprising a screw cap (2) having an inner cylinder (18), an edge (22) which extends from the inner cylinder (18), and a reservoir (4) which is rotatably arranged in relation to the inner cylinder (18), said reservoir (4) consisting of a base (32) and a receiving element (36) extending from said base (32), for receiving the projecting edge (22).

Description

TURN LOCK FOR A CONTAINER

DESCRIPTION

Field of the Invention

The present invention relates generally to a rotary closure for a container and in particular to a rotary closure with a screw cap and a storage container arranged in the screw cap with substances accommodated therein, which can get into the container through an opening in the storage container created when the screw closure is removed.

Background of the Invention

For containers such as Bottles, cans, tubes and the like, it is often necessary to add additives to container contents shortly before use. Manual addition of the additives is complex and can result in the desired ratio of additive and container content not being obtained.

For this purpose it is known to use devices serving as a container closure which have additives to be mixed with the contents of the container in one or more chambers. When such a container closure is opened or closed, the chamber (s) are opened so that the additives contained therein can get into the interior of the container.

From US Pat. No. 4,024,952, a screw cap for a container is known, in which an additive for mixing with an insert having a container content is rotated relative to a lid during a rotary movement to open the closure. Due to the friction of the insert on the inside of the container opening, a predetermined breaking point of the insert is separated and a cover closing the insert is detached therefrom. This allows the additives from the get into the container, it being disadvantageous that the closure lid detached from the insert also falls into the interior of the container.

EP 0 190 593 A2 discloses a closure cap for two-component packaging systems, in which a concentrate to be mixed with a bottle content is accommodated. In one embodiment, the closure cap has an inner cylinder with an external thread, onto which a cup-shaped container with the internal thread containing the concentrate is screwed. The thread of the cap for screwing onto a bottle and the thread of the external thread of the inner cylinder are selected so that when the cap is turned, the container is screwed onto the inner cylinder until the inner cylinder reaches a predetermined breaking line in the area of the Severed the bottom of the container. Through the opening of the container created in this way, the concentrate contained therein can get into the bottle. Here, too, the bottom of the container is separated from it and thus reaches the inside of the bottle. In one embodiment of this closure cap, the opening of the container to release the concentrate is effected when the closure cap is rotated in the closing direction. In this case, the concentrate can be released into the bottle if the cap is turned too far in the closing direction.

From DE-82 14974 Ul a closure cap for a container is known, in which a medium to be introduced into the container is contained. Turning the cap releases a channel in the cap through which the medium can get into the container. To open the channel, window surfaces of two cylinders lying one inside the other must be brought to cover. The disadvantage here is that the closure cap must be turned so that the window surfaces assume the positions required to release the channel.

US 5,984,141 discloses a screw cap for a drinking container. The screw cap contains a liquid to be mixed with a container liquid, which can be introduced into the container by rotating the screw cap. A channel is released when the screw cap is turned the liquid from the screw cap gets into the container. Here too, the screw cap must be turned exactly so that the channel is released. Furthermore, the amount of rotation of the closure cap determines the amount of liquid in the screw closure that is to get into the container. This can result in the amount of liquid in the screw cap entering the container being too small.

Object of the invention

The object of the present invention is to provide a closure for a container which enables substances in the closure to be supplied to the interior of the container when the container is opened, the disadvantages of the prior art being avoided. This is to ensure that, apart from the substances contained in the closure, no components of the closure can get into the interior of the container. Furthermore, the closure should be easy and inexpensive to manufacture and assemble.

Brief description of the invention

The approach on which the present invention is based is that the twist lock according to the invention has a cutting edge which extends inside a screw cap and is received in a pocket of a storage container when it is arranged on the screw cap.

For this purpose, a screw cap for a container, for example a bottle, is provided according to claim 1. The twist lock according to the invention comprises a screw cap with an inner cylinder and a cutting edge extending from the inner cylinder. Furthermore, a storage container for rotatable arrangement on the inner cylinder is provided, which comprises a storage container base and a pocket extending therefrom for receiving the cutting edge. The pocket preferably defines not only a cuboid-shaped space open at the top for receiving the cutting edge, but also a space whose “bottom” extends obliquely to the storage container bottom. The pocket can thus comprise a flat lower end face, which represents the bottom of the cuboid-shaped receiving space, and a curved end face, which extends from the lower end face to the storage container bottom and forms the sloping bottom.

In order to facilitate the opening of the storage container, a transition from the curved end face to an outer side face of the pocket can have a material taper. This transition makes it easier to create an opening in the storage container by means of the cutting edge.

The transition between the bottom of the storage container and the wall of the storage container is preferably of a helical configuration and has a pitch which essentially corresponds to a pitch of a thread pair provided for arranging the screw cap on a container.

In order to facilitate the cutting process when the storage container is opened further, it is provided that a transition between the storage container bottom and a storage container wall has a material taper. The entire transition area between the bottom of the storage container and the wall of the storage container can be shaped in this way. Alternatively, it is possible, following the transition from the curved end face to the outer end face of the pocket, to make part of the transition region between the reservoir bottom and the reservoir wall thinner. This can limit the cutting process.

The storage container wall is preferably cylindrical and at least partially surrounds the inner cylinder when the storage container is arranged on the screw cap. In order to prevent rotation of the storage container together with the screw cap when the screw cap is rotated in the opening direction, the storage container is provided with a structure which acts as a turnstile when the screw cap rotates in the opening direction. This can be achieved, for example, by a collar formed on the storage container with a sawtooth-like structure formed thereon.

The collar is preferably arranged on the outside of the storage container, its sawtooth-like structure pointing in the direction of the storage container base. Alternatively, the sawtooth-like structure of the storage container can also point outward in the radial direction. The orientation of the sawtooth-like structure depends on how the opening area of the bottle is designed.

The effect of the sawtooth-like structure of the storage container as a turnstile is advantageously provided only for a predetermined rotation, for example by 180 °, of the twist lock in the opening direction.

Furthermore, a shoulder can be arranged on the inner cylinder, which extends on the outer circumferential surface and in the circumferential direction of the inner cylinder.

To cooperate with this shoulder of the inner cylinder, upper and lower stops can be arranged on the storage container. The upper and lower stops of the storage container, together with the shoulder of the inner cylinder, limit movements of the storage container relative to the screw cap in the longitudinal direction of the inner cylinder when the storage container is arranged on the inner cylinder.

In addition, it is possible for a stop, for example a web which surrounds the inner cylinder in a circle, to be formed adjacent to the end of the inner cylinder opposite the cutting edge on the inside of the screw cap. This approach Blow serves to limit movements of the storage container along the inner cylinder.

Furthermore, the shoulder of the inner cylinder and / or the upper and lower shoulders of the storage container can be designed to seal substances which are arranged in the storage container.

To arrange the screw cap on a container, a screw cap wall is provided, which is preferably designed as an outer cylinder surrounding the inner cylinder and is provided with a thread.

In order to be able to check whether a screw cap according to the invention arranged on a container has been opened, an originality ring connected to the screw cap wall via a predetermined breaking point is provided.

Furthermore, the present invention provides a container for use with the twist lock according to the invention, the container having a sawtooth-like structure at its opening, which is designed to interact with the sawtooth-like structure of the storage container.

In particular, it is provided that the sawtooth-like structure of the container is designed such that, in cooperation with the sawtooth-like structure of the storage container, it only permits rotations thereof in the closing direction.

Brief description of the figures

In the following description, reference is made to the accompanying figures, of which: 1 and 2 are schematic representations of a screw cap of the twist lock according to the invention according to a preferred embodiment,

3 and 4 are schematic representations of a storage container of the twist lock according to the invention according to the preferred embodiment,

5 and 6 further schematic representations of the screw cap of Fig. 1 and 2 and the storage container of Fig. 3 and 4,

7 shows schematic representations of an opening area of the container according to the preferred embodiment,

8 shows schematic representations of the screw cap from FIGS. 1, 2 and 5 and the storage container from FIGS. 3, 4 and 6 in states arranged at the container opening from FIG. 7, and

9 shows schematic representations of the screw cap of FIGS. 1, 2 and 5 and of the storage container of FIGS. 3, 4 and 6 in a position when rotated in the opening direction.

Description of preferred embodiments

With reference to the accompanying figures, an embodiment of a screw cap for a container is described, which comprises a screw cap 2 (see FIGS. 1, 2 and 5) and a storage container 4 (see FIGS. 3, 4 and 6). Substances can be accommodated in the storage container 4, which should come into the interior of a container closed with this when the screw cap is opened. As illustrated in FIGS. 1, 2 and 5, the screw cap 2 has a screw cap wall 6 with a substantially circular cross section and a screw cap cover 8 connected to the screw cap wall 6. The end face (not designated) of the screw cap wall 8 of the screw cap wall 6 is over a Connection designed as a predetermined breaking point 10 is connected to a tamper-evident ring 12. If the screw cap 2 is unscrewed from a container closed with it, individual or more molded structures 14 act on the tamper-evident ring 12 with structures correspondingly molded on the container in such a way that the connection of the tamper-evident ring 12 with the screw cap wall 6 is separated, ie the predetermined breaking point 10 is separated. In this way it is indicated that the screw cap 2 has already been removed from a container closed with it, whereas an originality ring 12 connected to the screw cap wall 6 indicates that the screw cap 2 has not yet been removed from the container.

The screw cap wall 6 has a thread 16 on its inside in order to screw the screw cap 2 onto a correspondingly shaped external thread of a container (see FIGS. 7 to 9). Furthermore, a tubular structure, hereinafter referred to as the inner cylinder 18, extends from the screw cap cover 8. The inner cylinder 18 has an essentially circular cross section and is aligned essentially coaxially with the screw cap wall 6. A shoulder 20 is arranged on the outside of the inner cylinder 18, which lies in a plane essentially parallel to the screw cap cover 8 and extends in a ring around the inner cylinder 18.

The inner cylinder 18 has at its free end opposite the cap cover 8 a blade 22 which extends in the longitudinal direction in the manner of a tongue. The cutting edge 22 forms an outer surface of an imaginary extension of part of the free end of the inner cylinder 18. Accordingly, the cutting edge 22 has the same radius of curvature as the inner cylinder 18. In the embodiment shown, the radial dimensions of the inner cylinder 18 and the cutting edge 22 also correspond, ie both are approximately the same thickness. Furthermore, end faces of the free end of the cutting edge 22 beveled or sharp-edged to support the opening of the storage container 4. In particular, it is provided that the lateral end face 22a and / or the end face 22b, at least their region bordering the end face 22a, is formed with sharp edges. The other end face 22c can be made blunt in order to avoid undesirable damage to the storage container 4.

Furthermore, on the inside of the screw cap cover 8 there is an annular web 24 which acts in the longitudinal direction of the inner cylinder 18 and is arranged essentially concentrically to the screw cap wall 6 or the inner cylinder 18 and surrounds the latter in a circle. Advantageously, the outside of the screw cap wall 6 is at least partially provided with a structured surface 26 in order to support the handling of the screw cap 2 when placing it on and removing it from a container.

The storage container 4 illustrated in FIGS. 3, 4 and 6 comprises a storage container wall 30 of essentially circular cross section and a storage container base 32 connected to it

The reservoir bottom 32 has a reservoir bottom region 32a and a pocket-like protuberance or pocket 36, which serves to receive the cutting edge 22 when the reservoir 4 is arranged on the inner cylinder 18.

The pocket 36 is delimited by surfaces 38 to 46. The surface 38 extends in the longitudinal direction and in the radial direction of the storage container 2. The inner and outer boundary surfaces 40 and 42, viewed in the radial direction of the storage container, are curved surfaces with an essentially identical radius of curvature which corresponds approximately to the radius of curvature of the storage container wall 30. The end face 44 lies in a plane perpendicular to the longitudinal direction of the storage container 2, while the end face 46 is an optionally curved surface which extends from the end face 44 to the storage container bottom region 32a. The end face 46 forms a surface that is tilted with respect to the longitudinal direction of the storage container 32. The surfaces 38, 40, 42 and 44 define a receiving space for the cutting edge 22, in which it is received when the storage container 4 is pushed onto the inner cylinder 18 at most.

The storage container base 32 comprises a surface area 48 which is inclined with respect to the longitudinal axis of the storage container 2. The inclined surface area 48, the boundaries of which are shown by broken lines in FIG. 3, extends from the surface 40 of the pocket 36 to the center of the storage container base 32 tapering.

Furthermore, the storage container bottom 32 has a material taper 50 extending transversely through it. The illustrated in the upper middle representation of FIG. 3 by the dashed lines denoted by the reference numeral 50, various arrangements of the material taper 50 are provided, the effect of which is described below.

A transition 52 between the reservoir bottom 32 and the reservoir wall 30 is tapered relative to the thickness of the reservoir wall 30 and / or the thickness of the reservoir bottom 32, i.e. has a smaller thickness. The transition 52 is provided as a predetermined breaking point or predetermined separation point in order to support the interaction with the inner cylinder 18 described below. Such a tapering of the material is also provided at a transition 54 between the surfaces 44 and / or 46 and the surface 42 of the pocket 36.

The transition 52 extends helically with respect to the longitudinal direction of the storage container 4 or the screw cap 2, the pitch of the screw lines formed by the transition 52 essentially corresponding to the pitch of a thread pairing of the thread 16 of the screw cap 2 and one in the opening area the thread to be used for the screw cap is formed. This design of the transition 52 can be achieved in that, as shown in FIG. 6, the storage container bottom region 32a forms a tilted, inclined surface with respect to the longitudinal direction of the storage container 4. The helical shape of the transition 52 can also be achieved in that the reservoir bottom region 32a is so thick that the transition 52 can be formed helically in it. This helical design of at least the transition 52 permits a more compact design, in particular a slight extension of the cutting edge 22 in the longitudinal direction, since the position of the cutting edge 22 or of the area of the cutting edge 22 which separates the transition 52 due to the helical design relative to the transition 52 is retained when unscrewing the screw cap 2.

At the end of the storage container 4 opposite the storage container bottom 32, an outer collar 56 is arranged, which has a sawtooth-like structure 58 on its end face directed towards the storage container bottom 32 and is designed on its opposite end face for the arrangement of sealing elements (not shown). In this embodiment, a shoulder 60 provided by the collar 56, optionally in connection with the reservoir wall 30, is provided for receiving sealing elements (e.g. sealing rings).

Furthermore, the storage container 4 has on its inside an upper, annular stop 62 and a lower, annular stop 64. The lower stop 64 can, as can be seen in the figures, for example by reducing the cross section of the reservoir wall 30, at least in the area provided for the lower stop 64. The distance between the upper and lower stops 62 and 64 in the longitudinal direction of the storage container 4 defines a play for movements of the storage container 4 relative to the screw cap 2.

To use the closure, a material G is arranged in the space delimited by the reservoir wall 30 and the reservoir bottom 32 (not designated), which material is to be introduced into a container used when the closure is actuated. Examples of such a substance include medical and non-medical globules, tablets, powders, fluids, etc. and combinations thereof. After filling, the storage container 4 via the inner cylinder 18 Screw cap 2 pushed until the upper stop 62 of the storage container 4 engages behind the shoulder 20 of the screw cap 2. In this way, the storage container 4 is secured to the screw cap 2. Movements of the storage container 4 relative to the screw cap 2, more precisely movements in the longitudinal direction of the inner cylinder 18, are operatively connected to the shoulder 20 by the upper and lower stops 62 and 64 of the storage container 4 and depending on that by the distance between the upper and lower stops 62 and 64 limited in the longitudinal direction of the reservoir 4 game defined.

In particular, the play defined by the upper and lower stops 62 and 64 for movements of the storage container 4 relative to the inner cylinder 18 should be such that the storage container 4 can be rotated about the inner cylinder 18, so that the cutting edge 22 does not extend into the pocket 36 , In this way, it is not necessary to align the storage container 4 on the inner cylinder 18 (at least initially) relative to one another such that the cutting edge 22 and the pocket 36 are aligned relative to one another. Rather, the storage container 4 can initially be oriented relative to the inner cylinder 18 when it is arranged, since an alignment of the cutting edge 22 and the pocket 36 relative to one another is achieved by subsequent rotation of the closure cap 2 and the storage container 4.

The web 24 serves as a stop for limiting movements of the storage container 4 in the direction of the screw cap cover 8, so that the storage container 4 cannot be pushed onto the inner cylinder 18 so far that the shoulder 20 engages behind the lower stop 64. This prevents the storage container bottom 32 and in particular the pocket 36 from being damaged by the cutting edge 22, for example when a force in the direction of the sealing cap cover 8 is exerted thereon when the sealing cap 2 with the storage container 4 arranged thereon is handled.

Furthermore, the web 24 serves as a sealing cone or sealing cylinder which interacts with the collar 56, the shoulder 60 or sealing elements arranged there in order to to close the storage container 4 in a sealing manner, in particular with respect to a container used with the screw cap.

In order to seal the interior space delimited by the inner cylinder 18 and the storage container 4, in particular in the case of fluids or substances of small particle size present therein, a sealing ring (for example, sealingly engaging on the outside of the inner cylinder 18) can act on the shoulder 62 of the storage container 4 (not shown) can be used. Furthermore, the shoulder 20, optionally with a sealing element (sealing ring) arranged on the shoulder 20, can be designed such that a seal between the inner cylinder 18 and the regions of the inside of the storage container 4 arranged between the upper and lower shoulders 62 and 64 is achieved. A coating suitable for sealing the inside of the storage container 4 between the upper and lower shoulders 62 and 64 is also possible.

The details given below regarding the screw cap 2 and the storage container 4 are only to be understood as special examples (see also FIGS. 5 and 6):

Screw cap 2

Material: PT

Weight: approx.3.2 g

Outside diameter: 30.3 mm

Height: 19.8 mm

Thread: pitch of eight revolutions per 3.175 mm; about two turns

\ \

Storage container 4 \ \

Material: PT X)

Weight: approx.0.8 g

Outside diameter: 22.2 mm Height: 14.6 mm For use with a closure comprising the screw cap 2 and the storage container 4, an opening of a container B, for example a bottle (not shown), is provided which, as illustrated in FIG. 7, has an opening wall 66. On its outside, the opening wall 66 comprises a thread 68 designed to cooperate with the thread 16 of the screw cap 2 and a shoulder 70 designed to cooperate with the tamper-evident ring 12 or the structures 14 formed thereon. Furthermore, one is closed on the inside of the opening wall 66 The sawtooth-like structure 58 of the storage container 4 has a complementarily shaped sawtooth-like structure 72.

In particular, the sawtooth-like structures 58 and 72 are designed in such a way that, when they are brought into operative connection with one another or are in a standing position, they permit rotations of the storage container 4 in the closing direction, but prevent rotations of the storage container 4 in the opening direction.

To close the opening delimited by the opening wall 66 and thus a container B connected to it, the screw cap 2 provided with the storage container 4 arranged on the inner cylinder 18 is screwed onto the thread 68 by means of its thread 16.

When the screw cap 2 is screwed onto the thread 68, the positioning of the storage container 4 relative to the screw cap 2 is maintained by the cutting edge 22 accommodated in the pocket 36, which engages with the end face 22c on the inside of the face 38. This is also the case when the sawtooth-like structure 58 of the storage container 4 engages in the sawtooth-like structure 72 of the container opening, since its sawtooth shapes are designed in such a way that they enable movements of the sawtooth-like structures 58 and 72 relative to one another when the screw cap 2 is screwed on.

After the screw cap 2 has been screwed on, as shown in FIG. 8, the container B is closed and can be handled without the inside of the cylinder 18 and the storage container 4 limited interior contained substances G get into the container B. This is achieved by unscrewing the screw cap 2.

When unscrewing the screw cap 2 for the first time, the originality ring 12 is separated from the screw cap wall 6 by means of the shoulder 70. Furthermore, the storage container 4 is secured against rotation due to the operative connection of the sawtooth structures 58 and 72, i.e. its post-screw position relative to sawtooth structure 72 is maintained. Accordingly, the inner cylinder 18 moves relative to the storage container 4.

The cutting edge 22 comes into contact at least with the end face 22a, depending on the design of the cutting edge 22 and / or the pocket 36 also with the end face 22b, with the inside of the pocket 36 in the area of the surface 46 and exerts forces, so that the Transition 54 is cut, pierced, cut and the like.

When the screw cap 2 is turned further in the opening direction, the end face 22a of the cutting edge 22 cuts through the storage container bottom 32 in the region of the transition 52. This process continues until the shoulder 20 of the inner cylinder 18 touches the upper stop 62 of the storage container 4.

Due to the severing of the transition 54 and the partial severing of the transition 52, the storage container bottom 32 folds down (ie in the direction away from the screw cap cover 8). Through the opening created in this way, the substances G contained in the space delimited by the inner cylinder 18 and the storage container 4 can get into the container B connected to the screw cap 2. This process is supported by the material taper 50 of the storage container bottom 32, which acts comparable to a hinge. The sloping surface area 48 causes the reservoir bottom area 32a to fold down more or faster. An almost complete opening and an improved emptying of the storage container 4 is thereby achieved. Furthermore, the emptying can take place through the inclined course of the reservoir bottom region 32a, as stated above get supported. In this case, the emptying can be influenced by the slope or slope of the storage container bottom region 32a, for example depending on the type and shape of substances arranged in the storage container 4.

In order to support the opening of the storage container 4 and in particular to improve the folding away of the storage container base 32 or at least parts thereof, provision is made for the storage container base 32 to be at least partially provided with a pretension. The pretensioning has the effect that when the transition 52 is cut and / or when it is terminated, the storage container base 32 or at least regions thereof, for example the storage container base region 32a, actively fold down. Such a pretension can be used to support the hinge effect of the transition 50 or, without the transition 50 or independently of it, cause the storage container 4 to open.

When the screw cap 2 is unscrewed further, the screw cap 2 moves relative to the storage container 4 until the shoulder 20 of the inner cylinder 18 touches the upper stop 62 of the storage container 4. The operative connection between the stops 20 and 62 causes the storage container 4 with the screw cap 2 to be moved away from the container B.

In order to be able to use the effect of the transition 50 as a hinge, it is provided that when the storage container 4 is cut through by the cutting edge 2, the storage container 4 is secured against rotation to the container B until the transition 52 starts from one end of the transition 50 to to the other end of transition 50 is severed. As illustrated in the middle upper illustration of FIG. 3, in the arrangement of the transition 50 shown according to the upper dashed line, the transition 52 is severed starting from the point I to the point II. In the case of the arrangement of the transition 50 represented by the lower dashed line, the transition 52 is severed starting from the point I to the III, while in the vertically running transition 50 the transition 52 starting from the point I to the point IV is severed. Instead of folding the storage container bottom 32 or at least regions thereof downward to open the storage container 4, for example using the transition 50 and / or an at least partial pretensioning, it is provided that the cutting edges 22 and / or the transition 52 are designed such that when they are passed through - NEN of the reservoir bottom 32 an opening is created which is sufficient to empty substances G contained in the reservoir 4. For this purpose, the cutting edge 22 can be dimensioned in such a way that cutting it through the reservoir bottom 32 creates a sufficiently large opening. For example, the cutting edge 22 can be wedge-shaped and / or thicker than the inner cylinder 18. As an alternative or in addition, it is possible to design the transition 52 wider than shown in the figures and / or to design it such that when cutting by means of the cutting edge 22 a sufficiently large opening is created in the storage container 4 in which, for example, wider areas of the transfer - Transitions 52 "break away" when the cutting edge 22 cuts through them.

Since the cutting edge 22 cannot cut through the end face 44 of the pocket 36, the reservoir bottom 32 remains connected to the reservoir wall 30 via the transition 50 and the inner boundary surface 40, the end face 44 and the outer boundary surface 42 of the pocket 36. This is the case regardless of how far the screw cap 2 is rotated in the opening direction before the operative connection between the sawtooth-like structures 58 and 72 is released and the storage container 4 together with the screw cap 2 are moved away from the container B. Thus, regardless of how far the cutting edge 22 opens the reservoir 4, the reservoir bottom 32 remains connected to the reservoir wall 30 and cannot fall into the container B. The extent to which the cutting edge 22 cuts through the transition 52 depends, among other things. depends on which substances the storage container 4 is provided with and / or at which rate these substances are to be supplied to the container B.

By further unscrewing, the screw cap 2 and the storage container 4 which is still connected to it can be removed from the container and, if necessary, screwed back onto the container in order to close it.

Claims

1. Twist lock for a container, with:

- a screw cap (2) which comprises an inner cylinder (18) and a cutting edge (22) extending from the inner cylinder (18), and

- A storage container (4) which can be rotatably arranged on the inner cylinder (18) and which comprises a storage container base (32) and a pocket (36) extending therefrom for receiving the cutting edge (22).

2. Twist lock according to claim 1, wherein the pocket (36) comprises a flat lower end face (44) and a curved end face (46) extending from the latter to the storage container bottom (32).

3. Twist lock according to claim 2, wherein a transition (54) from the curved end face (46) to an outer side surface (42) of the pocket (36) has a material taper.

4. Twist lock according to one of the preceding claims, in which

- The reservoir (4) has a cylindrical reservoir wall (30) for partially enclosing the inner cylinder (18), and

- A transition (52) between the reservoir bottom (32) and the reservoir wall (30) has a material taper.

5. Twist lock according to claim 4, wherein the transition (52) between the storage container bottom (32) and the storage container wall (30) is helical with a slope which is provided for a slope of one for arranging the screw cap (2) on a container (B) Thread pairing corresponds.

6. Twist lock according to one of the preceding claims, in which the storage container (4) comprises at its end opposite the storage container base (32) a collar (56) with a sawtooth-like structure (58).

7. Twist lock according to claim 6, wherein - the collar (56) is arranged on the outside of the storage container (4), and

- The sawtooth-like structure (58) in the direction of the reservoir bottom (32).

8. Twist lock according to claim 6 or 7, in which

- The sawtooth-like structure (58) serves as a turnstile for the storage container (4) when the twist lock is opened for a predetermined rotation of the screw cap (2) in the opening direction.

9. Twist lock according to one of the preceding claims, wherein the inner cylinder (18) has on its outer peripheral surface a circumferentially extending shoulder (20).

10. Twist lock according to claim 9, wherein the inside of the storage container (4) has an upper stop (62) and a lower stop (64) for cooperation with the shoulder (20) arranged on the outer circumferential surface of the inner cylinder (18) ,

11. Twist lock according to claim 10, wherein the upper stop (62) and the lower stop (64) on the inside of the storage container (4) are annular.

12. Twist lock according to one of the preceding claims, in which a stop (24) for the storage container (4) is formed adjacent to the end of the inner cylinder (18) opposite the cutting edge (22) on the inside of the screw cap (2).

13. Twist lock according to claim 12, wherein the stop (24) formed on the inside of the screw cap (2) is a web surrounding the inner cylinder (18) in a circular manner.

14. Twist lock according to one of the preceding claims, in which

- The screw cap (2) comprises a screw cap wall (6) surrounding the inner cylinder (18), and

- A thread (16) is arranged on the inside of the screw cap wall (6).

15. Twist lock according to claim 14, in which

- The screw cap (2) comprises a screw cap cover (8) connected to the screw cap wall (6), and

- A tamper-evident ring (12) is attached to the screw cap wall (6) opposite the screw cap cover (8) via a connection designed as a predetermined breaking point (10).

16. A container for use with the twist lock according to one of the preceding claims, with a sawtooth-like structure (72) formed on an opening wall of the container delimiting an opening for interacting with the sawtooth-like structure of the storage container (4).

17. A container according to claim 16, wherein the sawtooth-like structure (72) formed on the opening wall (66) is designed, in operative connection with the sawtooth-like structure of the storage container (4), to permit rotations of the storage container (4) only in the closing direction.