EP0049876A1 - Tamperproof screw closure - Google Patents

Abstract

A screw cap on containers, for example bottles, with a closure cap covering the container opening, in particular made of plastic, which has a screw cap to be screwed onto a thread in the area of the container opening and a safety ring which can be torn off and is attached to the opening edge of the opening and is positively attached behind one adjacent to the thread radial projection engages at the container opening, is attached to the safety ring (26) with an end region facing away from the screw cap (25) with at least one inward-directed, form-fitting under or behind the radial projection (23) in the opening region (21) of the container (20) engaging locking projection (31; 32). This locking projection (31; 32) protrudes radially inward opposite the inner surface of the safety ring (26). The latching attachment can be designed as an annular collar (32) or as a ring of latching tabs (31). In any case, the locking projection (31; 32) is suitable for sliding the screw cap (25) connected to the safety ring (26) over the radial projection (23) in the opening area (21) of the container (20) and behind it radially Lock projection (23) so that unscrewing the screw cap (25) is only possible by separating from the safety ring (26). The screw cap (25) connected to the safety ring (26) can be screwed on for the first time by machine.

Description

The invention relates to a screw cap on containers, for example bottles, with a cap covering the container opening, in particular made of plastic, which has a screw cap to be screwed onto a thread on the container opening and a safety ring which can be torn off at the opening edge thereof and which positively connects to a - seen from the edge of the container opening - behind the thread on the container arranged radial projection engages, the safety ring separating when opening for the first time from the screw cap and can be seen that the container has been opened.

A screw cap of this type is known from DE-OS 20 24 990. With this screw closure, when the container is closed after the closure cap has been screwed onto the container opening, the safety ring on its edge region remote from the screw cap is deformed around the end face of a ring-shaped radial projection formed on the container and removed from the thread. If the cap of this known screw cap is made of plastic, the safety ring must be plasticized by the action of heat when closing a container in order to be able to deform it over the end face of the ring-shaped radial projection which is removed from the thread. This operation not only requires considerable equipment outlay for the closing and securing of containers, but is also so time-consuming that it cannot be inserted into the work cycle of the customary filling and closing systems. In practice it is therefore necessary to have two or more separate devices behind the exit of a filling and capping machine Arrange system to be able to secure the closed container in the manner described above. When the sealing cap is made of thermoplastic, it is also conceivable to heat the region of the safety ring molded onto the radial projection sufficiently so that it can be shaped back and then molded onto the radial projection again. The known screw caps with a sealing cap made of thermoplastic material do not offer absolute tamper evidence.

In contrast, it is an object of the invention to significantly improve a screw closure of the type mentioned above in that when closing the container, i.e. when the cap is screwed onto the container opening, the locking of the closure occurs automatically in the closed position, the containers provided with a thread and radial projection in the region of their opening, but above all the caps should be cheap to mass produce.

This object is achieved according to the invention in that the safety ring has on its inside at least one inwardly directed, positively engaging under or behind the radial projection on the container opening. Due to the positive engagement of such a locking projection on the radial projection at the container opening, an effective lock against unscrewing the closure; created cap that can not be solved by mechanical influences from the outside without separating the safety ring from the screw cap or by destroying, but at least considerable, visible damage to the safety ring. Since the latching lug is arranged on the inside of the safety ring, it is covered by the safety ring and cannot be made deformable by heat from the outside, even if the closure cap is made of thermoplastic material. Finally, the training as a latching approach is suitable, the latching process as the last effect Allow the container to close automatically by screwing on the cap.

So far, it had to be considered impossible to form such a locking approach on the safety ring of caps, because the cap could only be removed from the mold after spraying, if inwardly projecting parts were sufficiently flexible and suitable for demoulding. Then, however, such inwardly projecting elements would not be able to act as a catch. However, this mutual exclusion could surprisingly be eliminated for the catch with the screw closure according to the invention.

In one embodiment of the invention, the latching projection is designed as an inwardly directed, annular collar on the peripheral edge of the safety ring that is removed from the screw cap. In this case, this may be so configured that the annular collar extends along the inner surface of the _S icherheitsringes substantially, but tapers towards the screw cap.

The preferred embodiment of the invention provides that the latching projection is designed as a ring of latching latches directed inward in the form of hooks on the peripheral edge of the safety ring removed from the screw cap. These locking tabs can also extend essentially along the inner surface of the safety ring, but can be positioned obliquely inwards with respect to the common axis of the safety ring and screw cap. Before mounting the cap on the container opening, these latching tabs may be of the _S icherheitsringes or substantially in the plane of the remote edge of the screw cap on a conical surface extending from the free edge of the security ring to the outside and tapers outwards.

The wall thickness of the annular collar or the locking tabs can be kept low. It only has to be sufficient to hold the safety ring sufficiently securely against axial displacement and / or rotation, so that in any case when loosening the screw cap, the connection between the screw cap and tears off the safety ring. In particular, the wall thickness of the annular collar or the locking tabs can be less than the wall thickness of the safety ring. Due to the formation of the annular collar or the latching tabs with a small wall thickness, the closure cap, which is produced as a mass article, can be removed from the mold quickly and easily. This applies in particular to the embodiment of the invention in which locking tabs are provided.

In order to ensure a particularly effective, form-fitting engagement of the radial projection on the container and the latching attachment attached in the interior of the safety ring, it is advantageous if the radial projection provided in the region of the container opening is ring-shaped or partially ring-shaped and has a conical shape on its end face remote from the thread Support surface is formed for the latching approach. In the event of an axial displacement in the sense of loosening the screw cap, this conical support surface exerts a reaction force on the latching shoulder which, in addition to an axial force component, also forms a radial force component directed onto the safety ring. As a result, the latching lug can firmly press between the edge of the safety ring that supports it and the support surface on the radial projection of the container, thereby blocking the safety ring particularly firmly against axial displacement in the sense of loosening the screw cap.

It is also possible to design the radial projection provided in the area of the container opening in an annular or partially annular manner and on its end face remote from the thread with an essentially radially corrugated or ribbed support surface for the latching attachment. Due to this radially corrugated or radially ribbed design of the support surface, the latching attachment, be it in the form of an annular collar or be it in the form of a ring of latching tabs, the sliding movement over the support surface in the circumferential direction of the container opening is made considerably more difficult, so that when attempting the screw cap unscrew from the container opening, the safety ring is also additionally blocked against rotation with respect to the radial projection on the container. This blocking of the rotary movement occurs almost instantaneously when the screw cap is turned in the loosening direction, since even a slight loosening of the screw cap is made impossible. In any case, the then still possible release movement on the screw cap is so small that the sealing devices contained in the screw closure remain fully effective, even if an attempt is made to loosen the screw cap. This latter effect can be improved further in that in one embodiment of the invention the collar is toothed at its free end. Accordingly, this improvement can be achieved in the embodiment of the invention with locking tabs in that these locking tabs are essentially in the form of the direction of rotation to loosen the screw cap opposing saw teeth. As a result, when the closure is closed, the blocking achieved by ribbing or corrugating the support surface on the radial projection is largely ineffective, while it is substantially increased in the direction of rotation to loosen the screw cap.

The radial projection provided in the area of the container opening can be nose-shaped. A single such nose or a plurality of such noses, the latter being arranged at mutual intervals. During training of the radial projection on the container as a lug or as a number of lugs and when locking tabs are formed on the safety ring, a side run-up slope for the locking lugs that is effective in the direction of rotation for screwing on the screw cap should be formed on this nose or the lugs in the area of the container opening, so that the cap can be securely attached when closing the container. You can make the locking tabs so long that when turning the screw cap in the sense of loosening they meet laterally against such noses provided as a radial projection in the area of the container opening and thereby a still improved blocking effect against rotation of the safety ring and thus the entire closure cap in the opening direction form the closure. However, the radial projection in the region of the container opening can also be formed by a ring of nose-shaped individual projections. Then the locking tabs as well as an inwardly directed annular collar will be supported on the end face of the individual projections removed from the thread, the locking tabs or teeth or projections formed on the free edge of the annular collar gripping the container between the individual projections and thereby a highly effective blocking form the safety ring and thus the entire cap against twisting in the opening direction.

• Fig. 1 einen erfindungsgemäßen Schraubverschluß in beiden Ausführungsformen mit der Verschlußkappe im Schnitt und den Bereich der Behälteröffnung in Seitenansicht;
• Fig. 2 die Schraubkappe der einen Ausführungsform des erfindungsgemäßen Schraubverschlußes in Unteransicht;
• Fig. 3 einen Teilschnitt der Figur 2 nach der Linie 3-3;
• Fig. 4 eine Schraubkappe des erfindungsgemäßen Schraubverschlußes in einer anderen Ausführungsform in Unteransicht;
• Fig. 5 einen Teilschnitt nach der Linie 5-5 der Fig. 4;
• Fig. 6 einen erfindungsgemäßen Schraubverschluß mit abgewandelter Ausbildung an dem radialen Vorsprung des Behälters in Darstellungsweise wie Fig. l;
• Fig. 7 einen Schnitt nach der Linie 7 der Figur 6;
• Fig. 8 einen Schnitt nach der Linie 8-8 der Figur 7;
• _Fig. 9 einen Schnitt nach der Linie 9 der Figur 6;
• Fig. 10 einen Schnitt nach der Linie 10-10 der Figur 9;
• _Fig. 11 einen erfindungsgemäßen Schraubverschluß mit weiterer möglicher Abwandlung am radialen Vorsprung im Bereich der Behälteröffnung in Darstellungsweise wie Figur 1;
• _Fig. 12 einen Schnitt nach der Linie 12 der Figur 11;
• _Fig. 13 einen Schnitt nach der Linie 13-13 der Figur 12;
• _Fig. 14 einen Schnitt nach der Linie 14 der Figur 11; _'Fig. 15 einen Schnitt nach der Linie 15-15 der Figur 14;
• Fig. 16 einen Axialschnitt entsprechend Figur 1, jedoch von einer abgewandelten Ausführungsform und
• Fig. 17 einen Axialschnitt entsprechend Figur 16 für eine weitere abgewandelte Ausführungsform.

Embodiments of the invention are explained in more detail below with reference to the drawing. Show it:

• Figure 1 shows a screw cap according to the invention in both embodiments with the cap in section and the area of the container opening in side view.
• Figure 2 shows the screw cap of one embodiment of the screw closure according to the invention in a bottom view.
• Figure 3 is a partial section of Figure 2 along the line 3-3.
• 4 shows a screw cap of the screw closure according to the invention in another embodiment in a bottom view;
• Fig. 5 is a partial section along the line 5-5 of Fig. 4;
• 6 shows a screw closure according to the invention with a modified design on the radial projection of the container in the manner of illustration as in FIG. 1;
• 7 shows a section along line 7 of FIG. 6;
• Figure 8 is a section along the line 8-8 of Figure 7;
• _F ig. 9 shows a section along line 9 in FIG. 6;
• 10 shows a section along the line 10-10 of FIG. 9;
• _F ig. 11 a screw closure according to the invention with a further possible modification on the radial projection in the region of the container opening in the manner of illustration as in FIG. 1;
• _F ig. 12 shows a section along the line 12 of FIG. 11;
• _F ig. 13 shows a section along the line 13-13 of FIG. 12;
• _F ig. 14 shows a section along line 14 of FIG. 11; _'Figure 15 is a section along the line 15-15 of FIG. 14;
• Fig. 16 is an axial section corresponding to Figure 1, but of a modified embodiment and
• 17 shows an axial section corresponding to FIG. 16 for a further modified embodiment.

In the embodiments shown in the drawing, a container 20, for example a bottle made of any suitable material, such as glass, plastic and the like. in the area 21 of the container opening, a thread 22 and on the side remote from the opening edge, a thread 22, a radial projection 23, which can be ring-shaped, for example in the manner of a transport ring 23a. In the examples shown, the screw cap also contains a cap 24, which consists of a screw cap 25 and a Security ring 26 is constructed. The safety ring 26 is connected to the opening edge of the screw cap 25 via narrow, easily tearable webs 27 and is also produced in one piece with the screw cap 25 via these webs 27. In the examples shown, the safety ring 26 is offset radially outward relative to the screw cap 25, so that the connecting webs 27 extend essentially radially.

The closure cap 24 can be made of any suitable material, but preferably made of plastic. Thermoplastic materials such as polystyrene, polyester and polyolefins can be considered. However, it is also possible to manufacture the closure cap 24 from thermosetting harmonic material such as melamine resin or the like.

Furthermore, it is indicated in the illustrated exemplary embodiments that an additional element 28, for example a dropper insert or the like, is inserted into the actual container opening, which consists of relatively soft material, for example polyolefin, and whose flange-shaped peripheral edge also serves as a sealing element with an inside of the Screw cap 25 trained ring 29 cooperates.

In the embodiment shown in the left half of FIG. 1 and in FIGS. 2 and 3, the safety ring 26 is provided with a ring of latching tabs 21, which are molded directly onto the peripheral edge of the safety ring 26 that is removed from the screw cap 25. These locking tabs can - as can be seen particularly in Figure 3 - be formed with a significantly smaller wall thickness than the safety ring 26. When the closure cap 24 is screwed onto the container 20, these locking tabs 31 extend according to a cone from the free edge of the security ring 26 inwards and engage the end face 30 of the thread facing away from the 1 as a ring 23a, for example a transport ring, in the opening region 21 of the container 20 formed radial projection. By this support of the ring of locking tabs 31 on the end face 30, the safety ring 26 is blocked against axial movement towards the mouth of the container. Already in an attempt to unscrew the cap 24 from the container 20, the connecting webs 27 are torn and the safety ring 26 is separated from the screw cap 25. A particularly advantageous support of the latching tabs 31 is provided by the conically tapered design of the support surface 30, as can be seen in FIG. 1. As FIGS. 2 and 3 show, the latching tabs 31 can already be preformed on the inside of the safety ring 26 while standing inwards when the closure cap 24 is formed. The latching tabs will initially be set a little flatter than is the case in the position of use shown in FIG. 1 in order to cause the latching tabs 31 to properly latch behind the ring 23a when the closure cap 24 is applied to the opening region 21 of the container 20 and to itself to be resiliently placed against the peripheral surface of the container 20. But you can also - as shown in the right part of Figure 3 - first arrange the locking tabs 31 lying in the surface of the free edge of the safety ring 26. The latching tabs 31 then form when the closure cap 24 is placed on the opening region 21 of the container via the ring 23a and then snap behind the ring 23a when the screwing-on movement of the closure cap 24 ends, by placing it on the support surface 30.

The embodiment shown in the right part of FIG. 1 and in FIGS. 4 and 5 differs from that according to the left part in FIG. 1 and FIGS. 2 and 3 in that an annular conical collar 32 is provided on the inside of the safety ring 26 instead of the latching tab 31 is. This collar lies with its free edge against the support surface 30 on the ring 23a when the closure cap 24 is screwed completely onto the opening area 21 of the container 20. The blocking effect of this annular collar 32 is the same as that of the ring of locking tabs 31.

If the closure cap 24 is made of relatively soft, stretchable material, the annular collar can also first be shaped in the plane determined by the free edge of the safety ring 26 and, when the closure cap 24 is applied to the opening region 21 of the container 20, via the ring 23 into the Reshape inward conical shape.

Both in the version with a ring of locking tabs 31 and in the version with an inner annular collar 32, the closure cap 24 can easily be manufactured as a mass article, for example by means of a tool with a three-part core. For this purpose, the core for producing a closure cap 24 formed with latching tabs 31 can have a core part forming the inner surface of the screw cap 25, a core part forming the inner surface of the safety ring 26 and a third core part forming the spaces between the adjacent latching tabs. The third core part is then first pulled off to remove the space lying between the latching tabs 31. The core part which forms the essential part of the inner surface of the safety ring 26 is then rotated so far that its parts lying behind the locking tabs reach the spaces between the locking tabs 31. In this position, this second core part can be removed. Finally, the third core part is screwed out of the screw cap. Similar tool design and mode of operation can also be used for the production of a closure cap with an annular inner collar 32 on the safety ring 26. Instead of the formation of the annular collar 32 in one plane shown in the right-hand part of FIGS. 4 and 5, this could also be conical be molded on the outside, which would make the manufacture and demolding of the cap 24 even easier. When such a closure cap 24 is placed on the opening region 21 of a container 20, the outwardly pre-shaped annular collar 32 on the ring 23 forming the radial projection would be put inside the safety ring 26. In any case, it is advisable when applying a closure cap 24 with an inner annular collar 32 formed on the safety ring 26 to guide and hold the safety ring while the closure cap 24 is being screwed onto the opening region 21 of the container 20, so that the webs 27 do not tear off prematurely .

In the modification shown in the left part of FIG. radial projection 23 in the opening region 21 of the container 20 is formed on its end face 30, which is distant from the thread 22, with radial ribs 30a. These ribs block the edge resting against the end face 30 both in the case of a ring of latching tabs 31 or 31a and in the case of an annular collar 32 or 32a on the safety ring 26. In principle, the. Locking tabs 31 or the annular collar 32 can be designed in the same way as explained in connection with Figures 1 and 5, because - in particular when producing the closure cap 24 from relatively soft plastic - the ribs 30a in the edge of the locking tabs 31 or of the annular collar 32. FIGS. 7 and 8 show, however, that in this connection it is preferable to design the locking tabs 31a in the form of trapezoidal saw teeth, these saw teeth with their tips in the direction of rotation of the saw teeth _. Closure cap 24 are employed, in which the screw cap 5 is unscrewed from the thread 22. As a result, the latching tabs 31a engage between the ribs 30a even more securely.

Due to the radial ribs 30a and in particular in cooperation with the sawtooth-shaped design of the locking tabs 30a, the safety ring 26 is in the closed position of the ver closure cap 24 is blocked against rotation in the opening direction of the screw cap 25 so that even a small rotational movement of the closure cap 25 is sufficient in the opening direction to the _V ER- bond bridges 27 between the screw cap 25 and to tear down the security ring 26th

As can be seen from FIGS. 9 and 10, the annular collar 32a can be designed with teeth 32b on its free edge which lies against the support surface 30. These teeth may be saw-tooth, such that the tips of these _S ägezähne preclude rotational direction, by which the cap 24 has been unscrewed from the threaded 22nd Together with the ribs 30a on the annular projection 23, this toothing 32b forms a complete blocking of the safety ring 26 against rotation in the opening direction of the screw cap 25.

A further modification can be seen from the right-hand parts of FIGS. 6, 7 and 9. In this example, the radial projection is formed by a ring of individual projections 23b. Each of these individual projections 23b has a run-up surface 23c, which makes it possible for the latching tabs 31 and 31a to run smoothly over the circumferential surface of the ring of individual projections 23b when the container is first closed, that is to say when the closure cap 24 is screwed onto the opening region 21 of the container 20. In the direction of rotation effective for loosening the screw cap 25, however, essentially radial catch surfaces 23d are formed on the individual projections 23b. As a result, even when the cap 24 is screwed onto the opening area 21 of the container 20, it is practically no longer possible to turn it back. As the right-hand part of FIG. 6 shows, the individual projections 23b as well as the annular radial projection 23a shown in FIG. 1 are formed with an end face 30 removed from the thread 22, against which the free edge of the latching tabs 31 or 31a or the free one Edge of the annular collar 32 and 32a is supported. However, the individual projections 23b offer the additional advantage that when the closure cap 24 is rotated in the opening direction of the screw cap 25, the latching tabs 31, in particular the latching tabs 31a with a sawtooth shape, become additionally caught on the radial catching surface 23d and thereby block the safety ring 26 against rotation in the opening direction of the screw cap 25. The same applies to the teeth 32b on the annular collar 32a.

Both the latching tabs 31 and 31a and the annular collar 32 and 32a can initially be axially or axially spread-shaped, as shown in FIGS. 8 and 10 in their right part, and then on the radial projection when the closure cap 24 is fitted or screwed on 23a or the crown of radial _e inzelvorsprüngen 23b by an appropriate device at the _V be slipped inwardly erschraubmaschine.

Figures 11 to 15 illustrate further possible modifications of the invention in which the opening is in the region 21 of the _B ehäl- ters 20 formed radial protrusion 23 of four protrusions 23e formed. Each of these projections 23e has a run-up surface 23c and a catch surface 23d. On the end face removed from the thread 21, these projections 23e are each formed with a support surface 30. As in the examples in FIGS. 1 to 5, an annular collar 32 or a ring of latching tabs 31 can be formed on the safety ring 26. As indicated in the left-hand part of FIG. 11 and in the right-hand part of FIGS. 12 and 13, latching tabs 31b can also be provided, which are somewhat longer and therefore lie with their end region 31c on the 'peripheral surface of the radial projections 23, so as to block the Circumferential movement of the safety ring 26 on the catch surfaces 23d of the projections 23e. However, it is also possible to provide the support surface 30 of the projections 23e with ribs, as in the example of the left part of FIG. 6, in order to thereby block the circumferential movement of the safety ring 26 in addition to the axial support. In such a case, sawtooth-shaped latching tabs 31a, as in the example in FIG. 8, can also be used annular collar 32a with edge teeth 32b according to FIG. 10 may be provided.

Instead of the four projections 23e provided in FIGS. 11 to 15, it is also possible to provide only one such projection, the contact surface 23c of which extends around the entire circumference of the container 20 or only a part of its circumference.

In the example of FIG. 16, the safety ring 26 is formed on its circumferential edge facing away from the screw cap 25 with a ring of latching tabs 31d which, in the manner of barb elements, engage against the beveled, annular support surface 30 of the radial projection 23 on the neck of the container 26. In the example in FIG. 16, these latching tabs 31d form tooth elements which extend axially over a length 31f from the end edge of the safety ring 26 facing away from the screw cap 25.

Figure 17 shows a further modification of the figure 16 differs from that according to the fact that the _R astlaschen 31e are formed as simple latching hooks, that lie with their gripping surface approximately in a normal plane 31g to the closure axis. In this example too, the latching tabs are designed as teeth that extend axially from the safety ring 26 to the length 31f. In this embodiment, the screw cap 25 with the safety ring 26 is particularly suitable in connection with such containers 20, the radial projection 23 of which has an annular support surface 30b, which likewise lies approximately in a normal plane to the closure axis.

Reference symbol list

• 20 containers
• 21 Area of the container opening
• 22 threads
• 23 radial projection
• 23a transport ring
• 23b single lead
• 23c ramp area
• 23d catch area
• 23e four tabs
• 24 sealing cap
• 25 screw cap
• 26 safety ring
• 27 bridges
• 28 element
• 29 ring
• 30 end face
• 30a ribs
• 31 locking tabs
• 31a locking tabs
• 31b locking tabs
• 31c indentation
• 31d locking tabs
• 31e locking tabs
• 31f length
• 31g normal level
• 32 collar
• 32a collar
• 32b toothing

Claims (10)

1) screw cap on containers (20), for example bottles, with a cap (24) covering the container opening, in particular made of plastic, which has a screw cap (25) to be screwed onto a thread (22) in the region (21) of the container opening and one has a safety ring (26) which can be torn off and which positively engages a radial projection (23) arranged behind the thread (22) on the opening area (21) of the container (20), viewed from the container opening edge, the safety ring ( 26) when first unscrewing the screw cap (25) separated from this and reveals so that the container (20) open wur- ₁ i de, characterized in that the safety ring (26)! has on its inside at least one inwardly directed, positively engaging under or behind the radial projection (23) in the opening area (21) of the container (20) engaging catch (31, 31a, 31b, 31c, 31d, 3le; 32, 32a). 2) Screw closure according to claim 1, characterized in that the latching projection is designed as an inwardly directed annular collar (32, 32a) on the peripheral edge of the security ring (26) removed from the screw cap (25). 3) Screw closure according to claim 1, characterized in that the latching projection is designed as a ring of latching tabs (31, 31a, 31b, 31c, 31d, 31e) directed inward in the form of hooks on the peripheral edge of the safety ring (26) removed from the screw cap (25) is. 4) Screw closure according to claim 3, characterized in that the latching tabs (31, 31a, 31b, 31c, 31d) extend essentially along the inner surface of the safety ring (26), but obliquely inwards with respect to the common axis of the safety ring (26) and Screw cap (25) are employed. 5) screw cap according to claim 3, characterized in that the latching tabs (31) before placing the cap (24) on the container opening substantially in a plane determined by the edge of the security ring (26) removed from the screw cap (25), or on a conical surface which projects outwards from the free edge of the safety ring (26) and tapers outwards. 6) Screw closure according to one of claims 1 to 5, characterized in that the radial projection (23) provided in the opening region (21) of the container (20) is ring-shaped or partially ring-shaped and on its end face remote from the thread with a conical support surface (30) for the locking projection (31; 32) is formed. 7) Screw closure according to one of claims 1 to 6, characterized in that the radial projection (23) provided in the opening region (21) of the container (20) is annular or partially annular and on its end face remote from the thread (22) with an essentially radial corrugated or ribbed support surface (30, 30a) for the latching projection (31; 32) is formed. 8) Screw closure according to one of claims 1 to 7, characterized in that the radial projection (23) provided in the opening region (21) of the container (20) is in the form of one or more lugs (23e). 9) Screw closure according to claim 8, characterized by a plurality of radial, nose-shaped projections (23e) arranged at mutual intervals. 10) screw closure according to one of claims 1 to 6, characterized in that the radial projection (23) is formed by a ring of nose-shaped individual projections (23b) and when locking tabs (31, 31a, 31b, 31c, 31d, 31e) are formed the distance between adjacent individual projections (23b) on the safety ring (26) is smaller than the width of the latching tabs (31, 31a, 31b, 31c, 31d, 31e).

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