JPS58160260A - Dispenser for liquid, paste and powder - Google Patents

Abstract

1. A dispenser (1) for liquids, pastes or powders, consisting of a preferably flexible container (2) with a closure (3) at the mouth (19) of the container, said closure having two interlocking parts with concentric sealing surfaces which rotate relative to each other around their common axis, whereby the one closure part consists of a sleeve (5) affixed to the mouth of the container and the other consists of a hollow core (6) which is rotatable inside said sleeve, and is provided with a grip means, and whereby both parts have openings (7, 8) in said sealing surfaces, said openings being congruent in a given position thus dispensing the contents of the container, and said openings being sealable by turning said closure parts, wherein the axis (17) of said closure parts is congruent with the axis of said container mouth (29), whereby said sleeve (5) has an external section directed away from the inside of said container where it forms a contact seal with the inner wall of said container mouth and has an internal section which extends inside said container where it is provided with at least one openings (7), and that said sleeve (5) is made of relatively elastic material, and that said core (6) is made of relatively rigid material and that said internal section of said sleeve (5) is pressed by elastic tension against said core (6) in the area of said openings (7, 8).

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dispenser for liquids, batters, and powders. The dispenser consists of a preferably flexible container having a closure consisting of two concentric weighted sections, one of which is affixed to the container. Each portion has a sealing surface that rotates relative to each other and has an opening in this sealing surface. In one relative position of the two parts, these openings align, thereby allowing the contents in the container to be removed. The opening is no longer aligned in all other positions and the container is closed.

Dispensers of this type must meet various requirements. In terms of manufacturing, it must be simple in construction, use common equipment, be cheap to make, and be able to assemble and fill. During transport and storage, the contents shall not change in quality or be degraded in any way or leak out of the container. For users, ease of operation is the most urgent requirement. In particular, it must be possible to remove the contents using only one hand without having to manipulate the removable cap. At the same time, operation of the dispenser must not be made difficult by drying of the contents remaining in the opening.

In German Patent No. 861,666, a rotatable plastic cap was fitted onto the neck of the tube. Closures for tubes are described.

Both the cap and the neck of the tube have holes which, when mated, allow the contents of the tube to be removed. However, the disadvantages of this closure are as follows. That is,
Its elastic part is arranged on the outside, so that in the closed position the inner mouth is sealed by the outer elastic wall. If an internal pressure develops, i.e. if the tube is accidentally pressed, the sealing pressure will react, i.e. the elastic part of the wall will be pressed outwards,
and the contents of the tube are forced outwardly through the sealing surface.

In order to achieve a sufficient seal, the initial sealing pressure must be quite high, but this makes the cap difficult to turn. In addition, the outer mouth may become obstructed by dry contents.

During use, the outer opening quickly becomes dirty.

It is therefore an object of the present invention to provide a dispenser with a reliable, leak-proof closure that can be easily turned with one hand. This dispenser is intended to be able to be used in a stationary boulder or in the hand without affecting the sealing function in any way. In this invention, the portion of the container with the inwardly facing mouth is made of a relatively elastic material, and the other portion is made of a relatively rigid material, thereby closing the cap. These problems have been solved by making the sealing surface of the elastic part press against the mouth of the rigid part and increasing the sealing pressure when internal pressure is generated between the parts.

This sealing pressure is created by the initial tension that forces the sealing surface of the resilient part against that of the rigid part. Therefore, when the cap is closed, the outer opening is sealed and
And if the container is under internal pressure, this effect will be enhanced. For this reason, the initial sealing pressure may be low, so that the cap can be easily turned. The relatively elastic material may be, for example, an elastically deformable plastic, since it has a relatively low shear module and a tendency to return to its original shape.

In each embodiment of the invention, one of the two closures is affixed to the container. It is also advantageous to open one of these two parts during the removal day.

The latter allows the contents to be easily taken out without spilling.

A particularly advantageous construction from the point of view of molding and use can be obtained by designing one closure member as a sleeve and the other as a hollow core arranged in this sleeve. Here, the rotatable part of the closure is holding the handle. The shape of this closure allows for two pairs of openings to be provided in the sealing surface, so that in the closed position the contents of the container are doubly
- be sent. This point is particularly advantageous for liquids with low viscosity or objects containing volatile components.

During use, the outlet may become dirty or residue of the contents may dry inside the outlet. This problem has heretofore been avoided, for example by using removable caps. The dispenser described here also allows for one-handed use, but in this case the core or sleeve is connected to a cover surrounding the closure. This cover can be rotated together with the core or sleeve and is adapted to cover the outlet opening in the closed position. This prevents the contents remaining inside the closure part or the outlet from drying out. This point is particularly important for battered foods.

Depending on the construction of the closure, the axis of rotation of the closure part can extend either parallel or perpendicular to the longitudinal axis of the container. The position of the axis of rotation is, if the container is
If it is intended to be used in an immovable holder that is rotatable relative to the container or that holds the rhodium part,
This is especially important. If the rotation axes are parallel, the closure can then be opened by rotating the container around its longitudinal axis. 5 If the axis of rotation is arranged at right angles to the container, then the latter will rotate around the former. Here, the container body constitutes one lever.

In all cases, the dispenser described herein may be filled and sealed by conventional means.

However, in many cases, attachment of closures is complicated, expensive, or unsafe for shipping.

For this reason, another object of the invention is to provide a simple and reliable closure that requires little material and takes up little space.

There are two commonly known and used means of attaching a closure to a container: one part of the closure has internal threads that are screwed onto the external threads of the neck of the container, or The closure is pressed against the mouth of the container with a type of cap nut, thereby creating a seal. A common way to add to this is to add a skirt to the closure.

This skirt is attached to the container soil from the outside and is fastened thereto by grooves and edges.

However, although this construction requires relatively long and structurally complex parts, which increases the overall diameter of the closure and its cost, they
Sufficiently deep attachment elements, such as peaches and grooves, are commonly used because they can be economically formed only on the outside of the neck of the container. Inside the neck, these elements can only have a certain depth, since otherwise problems would arise during the manufacturing process when removing the container from the probe. For this reason, conventional attachments on the inside of the neck of the container do not hold up well against internal pressure.

The snug fastening of the closure is achieved by the following structure: when an elastic closure is attached to a container, it is essentially a cylindrical sleeve, the outer wall of which is attached to the neck of the container. A ring-shaped bead is formed which can be pushed into a corresponding ring-shaped groove on the inside of the ring-shaped groove, and its inner wall has a ring-shaped groove at the same height as that of the ring-shaped bead. The portion of the closure made of rigid material is a hollow core whose outer wall has a circumferential support shoulder that fits into a ring-shaped groove in the sleeve. The outer end of the core is fixed to the outer closure part so that the insertion pressure acts on it. At the other end, it bounds directly or indirectly with the interior of the container, so that the internal pressure has an opposite effect on it.

If the supporting shoulder of the core on the side closest to the mouth of the container and the adjacent surface of the ring-shaped groove of the sleeve essentially form a conical ring shape that narrows towards the mouth of the container. The core then provides a stable but releasable support for the sleeve. As long as the ring surfaces are joined, the ring-shaped bead on the outside of the sleeve will not be compressed;
Therefore, it is firmly placed in the ring-shaped groove of the neck of the container. 10' to the axis on the conical ring on the adjacent surface
It has been found that it is preferable to provide an angle larger and less than 40°.

If the support shoulder on the core is axially offset in the ring groove on the sleeve, and if the maximum inside diameter of the support shoulder is smaller than the maximum inside diameter of the ring groove, the closure will easily attach to the neck of the container. is broken into.

The sleeve at its annular bead is thus noticeably compressed as soon as the core with its supporting shoulders is displaced axially inwardly by internal pressure and the conical abutting surfaces no longer abut.

In the opposite case, the internal pressure pushes the supporting shoulders outwards, and the pressure on the conical proximal surface increases, so that the ring-shaped bead of the sleeve fits more firmly into the ring-shaped groove of the container. Pushed in. Since the sleeve is relatively elastic, the sealing properties are optimal.

In order to maximize the pressure required to extrude the closure, for a 1lliT flexible container, the wall thickness of the sleeve between its annular joint and annular groove should be adjusted to the maximum outside of the support shoulder on the core. It is advantageous to take into account from the beginning the elastic expansion of the container mouth caused by internal pressure, which is greater than the difference between the diameter and the minimum internal diameter of the container mouth.

Various embodiments of the invention are illustrated in the accompanying drawings and will be described in more detail below.

As shown in FIGS. 1-6, the dispenser 1 basically consists of a container 2 and a closure 6. As shown in FIGS.

In most cases, the container body is made of a flexible plastic material such that the contents can be removed by pressing on the container. However, the container can also be made of another material or additional means for removal can be used, ie a plunger or a gas.

This closure basically consists of a part 5 fixed to the container and a rotating part 6. All of these parts have a circular cross section and a Y-cylindrical shape, and have a common axis 17.
They can rotate freely relative to each other around the . The opening lower and 8 are arranged at right angles to the axis 17 and in the lower part, and the fixed lower is opened by turning the movable opening 8.
It can be sealed. Depending on requirements, the closure part may consist of several pairs of opening lowers and 8. The rotating part 6 opens into a dispensing opening 9, thereby facilitating the dispensing of the contents of the container. For this purpose, the two parts 5 and 6 are rotated relative to each other until the rotatable opening 8 is aligned with the stationary opening lower. When the container body is pressed, the contents are forced through the two opening lowers and 8 first into the cavity 18 of the core and from there to the outlet 9.

The closure portion facing the inside of the container is made of a relatively elastic material. In the embodiment of FIG.
This is clearly a fixed closure part 5. This is because the open lower part faces inside the container. In contrast, the rotating part 6 is made of a relatively rigid material, so that the stationary part 5 is pressed against the opening of the rotating part 6 when internal pressure is present. This measure provides a particularly tight seal.

The outlet 9 is integrally formed with an outer cap 19 which can be made of a different material than the rotating part 6. The individual elements can be assembled very easily, thereby greatly simplifying the manufacture of the closure.

Dispenser 1 is inserted into receiver 1 with the closure facing down.
0 into the wall holder 4, which can be inserted and installed in a reverse manner. The cutout 11 can fit into the outlet 9 and hold it securely. In this way, the outer cap 19 can be removed by simply rotating the container 2 around its axis until the two opening lowers and 8 are aligned in order to remove the contents from the non-rotating cylinder in the receptacle 10. Just that is enough. This makes it particularly easy to use, since both the rotating movement and the clamping of the container can be done with only one hand.

However, in this embodiment, the outer cap 1
9 has a concave handle 12 so that the closure can be actuated even when the container is not in the wall holder.

This handle 12 fits into a corresponding projection 2° in the wall holder.

The wall holder 4 can be fastened to the wall in various ways. For example, it can be fixed with screws, glue, or a suction cap. Horizontal surface instead of wall holder.

That is, any other desired immovable device can be provided for attachment to the table or the washbasin. The closure part which rotates relative to the container, i.e. the outer cap 19 in the embodiment of FIG. It is also understood that it is possible.

For example, a suction cap or a screw can serve as the above-mentioned fastening element. The rotatable portion, which is rotatable against the container, has a self-adhesive surface by which the container is securely attached to a suitable surface.

Figures 4-6 show another embodiment of the dispenser device. Here, the axis of rotation 17 is approximately perpendicular to the longitudinal axis of the container. The outlet 9 is y-perpendicular to the rotation axis 17vc, so the outlet 9 is y-parallel to the longitudinal axis of the container. The pin 16 at the end is rotatable and serves to hold the rhodium portion 6. The stationary opening lower is arranged on the side, so that in order to open the outlet 9 it must be rotated at right angles to the longitudinal axis of the container.

The wall holder 4 is adapted to a closure of a particular shape. This outlet 9 is however inserted into a slot 11 which is open downward. Here, also, the rotatable logure part 6 is held over the outlet by the slot 11, while the container is rotated to open the closure. In this embodiment, the stationary closure part 5 is made of a relatively elastic material. This closure part may be a separate part or part of the container.

As shown in FIG. 6, the container is closed at position A, where the axis of the container is perpendicular to y. In position A, the opening of the outlet 9 is also covered by a part of the holder. For this purpose, the slot 11 is enlarged to form a kind of sealing trough 21.

As soon as the container is turned in the direction of the arrow X, as a result of the friction between the two closure parts, the outlet 9 also rotates and thus disengages from the sealing trough 21.

At this point, the opening of the outlet 9 becomes free, and the outlet faces vertically downward.

The closure itself does not open until the container reaches position B. The contents are removed by pressing on the walls of the container.

To close the dispenser, the container must be turned again in the direction of arrow Y. Here, the outlet 9 is
It is rotated until it joins the sealing trough 21. The container is rotated further until it reaches the vertical position A. In this embodiment as well, the opened or closed dispenser can be removed from the wall holder in a single motion.

Under certain circumstances, it may be desirable to keep the container in a wall holder for storage purposes only, and to remove it from the holder when it is ready for use.

Nos. 7a and 7b show two embodiments which also have all the features of the invention, but the axis of rotation 17 of the closure part and also the outlet 9 are y-parallel to the longitudinal axis of the container. There is. In the embodiment shown in Figure 7a, the open lower and 8
is not perpendicular to the axis of rotation 17, but rather parallel to it. The grip 13 facilitates the manipulation of the closure and also serves to hold it in a fixed holder. The open lower and 8 are arranged concentrically on a common diameter. The rotatable rosture portion 6 is rotated until the two openings are aligned. In the closed position, the immovable closure part 5 made of elastic material is pressed firmly onto the opening 8. The embodiment shown in FIG. 7a has a closure similar to that shown in FIG. Only the outlet is formed as a direct extension of the core.

8 to 10 show an embodiment in which the outlet 9 is fixed to the container 2. In this embodiment, the rotatable closure part 6 is again placed inside the stationary closure part 5. However, this closure has two pairs of open lowers and 8. , 7' and 8', so that the cavity 18 of the core is doubly sealed. The freely rotatable rhodium portion 6 is integrated with the cover 14, so that the outlet 9 is completely covered.

This cover 14 has a concave gutter 26, the wall of which contains a slit 22 at the same height as the outlet 9. The inner diameter of the cover 14 is such that the opening 15 of the outlet is closed by the cover 14 when the outlet is covered. Drying of the contents remaining at the outlet is thus prevented.

The attachment of this to the wall holder 4 is exactly the same as in the other embodiments.

In the embodiment shown in FIG. 8, the sealing surface is generally conical and, in contrast to FIG. 4, there are no end pins for holding the rotatable rod portion. It is therefore necessary to provide other means for holding the rotatable portion in place. This can be done by providing a mating lip 24 perpendicular to the axis of rotation which presses adjacent sealing surfaces together.

These lips are rotatable and prevent axial displacement of the rhodium portion 6, but do not prevent rotation. Since the immovable closure part 5 is made of elastic material,
A rotatable rod portion made of rigid material is pressed against a stationary closure portion, thereby interlocking the lips.

This also greatly simplifies assembly of the closure.

FIG. 9 shows the closure of the dispenser with a rotated outlet. When the container is rotated around its axis, the outlet 9 projects through the slit 22 and
It is filtered out as shown in FIG. In this position, the opening lower and 8, and 7' and 8' are aligned, thereby allowing the contents to be removed. A further cup for the outlet 9 can be provided by a stationary holder 4 similar to the embodiment shown in FIGS. 4-6.

FIG. 11 shows another embodiment in which the outlet 9 is fixed to the container 2. However, this outlet is not provided with a cutter (-) as in the case of FIG. 6 in the receptacle.A protruding grip 13 is provided.When the container rotates, the outlet 9 also moves, so the slot in the holder must be of the correct size. Must be.

FIG. 12 shows an embodiment similar to that of FIG. 4, but the core corresponding to the immovable closure part 5 is made of an elastic material. The rotatable rod portion 6 is constructed as a sleeve and is provided with an outlet 9. Furthermore, when the closure is sealed, the fixed cover 14 can cover the outlet opening.

In the embodiment of FIG. 16, the core is also made of elastic material. Here, the core is rotatable and the rhodium part 6
14 shows a dispenser identical in construction to that of FIG. 8, while the closure part 5 made of a rigid material is fastened to the container. In Fig. 8, 1°7a, 7b, 1
1. The actual attachment of the closure to the neck of the container, as shown in Figures 12 and 16, has not been shown in detail for the sake of simplicity. Of course, in reality, unless the closure is welded or glued to the mouth of the container,
Mechanically attached to the neck of the container. The mechanical means for securing the closure is shown in FIG. The neck of the container with the opening 29 has a ring-shaped groove 28 on the inside.

This ring-shaped groove 28 is basically designed as a cylinder and has an inclined or circular guide at its outer end. This guide allows the container to be removed from the prop pin during manufacture. A cylindrical sleeve 26 made of a relatively resilient material has a ring-shaped outer bead that fits into a ring-shaped groove 28. A ring-shaped groove 60 is provided on the inside of the sleeve at the same height as this ring-shaped bead 27. On the outside of the hollow cylindrical core 25 made of a relatively rigid material, the support shoulder filter 1 fits inside the ring-shaped groove 60.

The adjoining surfaces of the support shoulder 31 and the annular groove 30 have the shape of a g-conical ring 32 that tapers in the direction of the mouth of the container. The angle α of this conical ring with respect to the axis of the container is between 10° and 40°.

A cavity 63 is provided between the core and the sleeve so that the core 25 can be displaced axially with respect to the sleeve 26. This displacement plays an important role when the closure is inserted into the container (transmitting insertion pressure through the cover 14 into the core 25), as explained below. The maximum outer diameter A of the support shoulder filter 1 is also smaller than the maximum inner diameter B of the ring-shaped groove 30. The diameter of the ring-shaped bead 27 can therefore be elastically reduced by H-A by an axial displacement of the core 25 as soon as the conical ring surfaces no longer abut.

In flexible containers, the wall thickness C of the sleeve at the same height as the ring-shaped bead 27 or ring-shaped groove 60 is such that it The dimensions are such that it is larger than the difference. By this means, when the closure is inserted, it expands elastically and at the same time the diameter of the ring-shaped bead 27 elastically decreases.

The method of attachment to the flexible bottle is shown in Figures 15 and 16. The individual parts of the closure are clearly simplified and shown without openings or outlets. 15a consists of a sleeve 26 and a core 25. FIG. Showing closure. Ring-shaped bead 27
A sleeve 26 with a 100 mm diameter is joined to a container 29. However, no deformation or displacement of individual parts has yet occurred.

To insert the closure, pressure is applied only to the core in the Z direction, as shown in Figure 15b. The sleeve 27 is now stretched axially and the support shoulder 61 is displaced axially inwardly relative to the annular groove 60, thereby forcing the conical ring surfaces 62 apart from each other. Since the support shoulder 31 no longer provides support, the annular bead 27 can elastically reduce its diameter. At the same time, the mouth 29 of the container is elastically widened by an amount E, so that the ring-shaped bead 27 is expanded by the ring-shaped groove 2B in the neck of the container.
It can be snapped into place. Due to internal pressure, the sleeve 26 elastically contracts via the non-flexible core 25,
This creates increased pressure at 32. Due to the internal pressure, the sleeve 26 cannot slip out of position even if the mouth of the container expands elastically by an amount E. This is because the support shoulder 61 prevents the ring-shaped bead 27 from being compressed. On the contrary, it is a ring-shaped bead 2
7 has a tendency to increase in diameter. The closure will not be pushed out unless the container is stretched beyond its elastic limit, which requires more force. As a result of the increased pressure between the core, sleeve, and mouth of the container,
The tightness of the seal is maintained.

The relative dimensions of the core, sleeve, container and their mounting surfaces are:
Obviously, in practice, approximately 100 ON/m at 20°C, determined both by the diameter of the container mouth and the shear module of the material used.
Good results are obtained by using a styrene-acrylic copolymer with a ril shear module. Regarding the sleeve, it is approximately 4ON/20℃ at 20℃.
An ethylene/-hinyl acetate copolymer having a shear module of - can be used.

For the sleeve it has a shear module as small as 100N/m♂ at 20°C and for the core it has a shear module of 30ON
It is advantageous to have a shear module greater than /+yJ.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of the closure of the dispenser. 2 is two cross-sectional views of the wall holder for the dispenser of FIG. 1; FIG. FIG. 3 is an overall view of the dispenser of FIG. 1. FIG. 4 shows a dispenser closure having a lateral closure axis. FIG. 5 shows the dispenser of FIG. 4 in a wall holder. FIG. 6 is a sectional view of the device shown in FIG. Figures 7a and 7b show another embodiment with an outlet parallel to the axis of the container. FIG. 8 shows a container closure having an outlet and an outlet cover attached to the container body. FIG. 9 shows the closure of FIG. 8 in the closed position. Figure 10 shows the closure of Figure 8 in the open position. FIG. 11 shows another embodiment with an attached outlet but without a cover. Figures 12 and 13 show an embodiment having a core made of elastic material. FIG. 14 is a partial cross-sectional view of a dispenser closure with attachment means according to the present invention. Figures 15a and 15b show the insertion of a simplified closure with attachment means, and Figures 162 and 16b show the inserted state of Figure 15 when the container is subjected to internal pressure. It shows closure. Symbol in the diagram 1... Dispenser 2... Capacity
Container 6...Claw share 4...Wall holder 5--Standable part 6...
Rotating part 7... Fixed opening 8...
・Movable opening 10...Receptor 11...
...Notch and part 12...Grip Ri 19
...Outer cap 20 ...Protrusion

Claims (1)

[Claims] 1. The closure has two mating parts, one of which is fixed to the container, and both of which have concentric sealing surfaces that rotate relative to each other about their common axis. an opening in the sealing surface of the image portion is aligned in a predetermined position to permit evacuation of the contents of the container; can be sealed by turning the closure so that the sealing surface of one of the parts closes the opening of the other part of the part, the closure part having an inwardly directed opening of the container being relatively resilient. and the other part of the closure is made of a relatively rigid material so that in the closed position, the internal pressure in the container causes the walls of the elastic part of the closure to It comprises a preferably flexible container having a closure, characterized in that it is pressed against and sealed against an opening in a rigid part of the closure. Dispensers for liquids, batters, or powders. 2. The sealing surface of the closure is expanded by the rigid closure part so that the elastic closure part generates circumferential sealing pressure. dispenser. 6. The dispenser according to claim 2, wherein the elastic closure portion is fixed to the container. 4. The elastic closure portion forms a sleeve, and the rigid closure portion is a hollow core rotatable within the sleeve, and is provided with gripping means. A dispenser according to claim 6. 5. The dispenser according to claim 4, wherein the core is provided with an outlet. 6. The sleeve and the core have at least two pairs of apertures each aligned in a relative position and open during the removal period with one aperture in the sleeve secured to the sleeve. 5. The dispenser according to claim 4, wherein the dispenser is provided with: Z The elastic closure portion constitutes a hollow core, and the rigid closure portion is a rotatable sleeve surrounding the core, and includes a gripping means and an outlet. A dispenser according to claim 3. 8. The dispenser according to claim 2, wherein the rigid closure portion is fixed to the container. 9. The rigid closure part forms a sleeve provided with an outlet, and the elastic closure part is formed as a hollow core that can rotate within the sleeve, and is provided with gripping means. A dispenser according to claim 8. 10. The core or the sleeve is connected to a cover surrounding the closure of the dispenser, and the cover is rotatable relative to the outlet,
Claims 6 to 9, characterized in that the opening of the ejection port is covered when the clip is in the closed position.
The dispenser described in any of the paragraphs. 11. The dispenser according to any one of claims 1 to 10, wherein the rotation axis of the closure portion is y-parallel to the longitudinal axis of the container. 12. Claims 1 to 12, wherein the rotation axis of the closure part is perpendicular to the vertical axis of the container.
The dispenser according to any one of Item 10. 16. The sealing surface of the closure part is 14,
Claims 1 to 3 are characterized in that the sealing surface of the closure portion is in the shape of a Y-cone or an ellipsoid.
13. The dispenser according to any one of Item 12. 15. The dispenser according to claim 14, wherein the rotating shaft is provided with a right-angled interlocking lip. 16. The dispenser has an immovable holder, and the holder is rotatable relative to the container, and the closure part can be opened by rotating the container around the rotation axis of the closure part. Claims 1 to 15 characterized in that
The dispenser described in any of the paragraphs. 1Z The dispenser according to claim 16, wherein the holder is configured such that the outlet is covered by the holder when the container is in the closed position. 18. A relatively rotatable rhodium part on the container,
It is characterized in that it has a mounting element for immovably fixing the container. In particular, a dispenser according to any one of claims 1 to 15. 19. A ring in which the elastic closure part is essentially a cylindrical sleeve in the area that fits into the neck of the container, the outer wall of the sleeve being pushable into a corresponding ring-shaped groove on the inside of the container. a portion of the closure having a bead shaped like the above, and an inner wall of the sleeve having a ring shaped groove at approximately the same height as the ring shaped bead, and having the above rigidity; Dispenser according to claim 1, characterized in that it is formed as a hollow core with an outer wall having a circumferential support shoulder, which fits into the ring-shaped groove of the sleeve. . 20. The surface of the ring-shaped groove of the sleeve and the surface of the support shoulder of the core on the side closest to the mouth of the container are adjacent and substantially in the direction of the mouth of the container; 20. A dispenser according to claim 19, characterized in that it has a tapered conical ring shape. 21. Dispenser according to claim 20, characterized in that the conical abutment surface makes an angle greater than 10[deg.] and less than 40[deg.] with respect to the axis of rotation. 22. The support shoulder on the core is axially displaceable in the ring-shaped groove on the sleeve, and the maximum outer diameter of the support shoulder is smaller than the maximum inner diameter of the ring-shaped groove. 22. A dispenser according to claim 21, characterized in that: 23. In a flexible container, the wall thickness of the sleeve between the ring-shaped ped and the ring-shaped groove is greater than the radial difference between the maximum outer diameter of the support shoulder on the core and the minimum inner diameter of the mouth of the container. 23. Dispenser according to claim 22, characterized in that it is large. 24. The core is fixedly connected at one end to the outer closure part such that an insertion pressure acts on said core, and at the other end internal pressure is directly or indirectly connected to said core. Claim 2, characterized in that it is bounded on the inside of said container so as to act on said container.
Dispenser according to item 2.