EP1698564A1 - Closure with anti-sabotage and safety function during the gas evacuation - Google Patents

Abstract

The cap (2) has a hollow cylinder (21) opened and extended at an end by a pilferproof ring (3) connected to the cylinder by a frangible bridge (31). The cylinder has inner threads (23) whose pitch corresponds to a pitch of the outer threads (13) of a neck of a container in order to screw the cap on the neck. The threads (23) extend on an angular zone of 380 degree so that the threads mesh on an angular zone of 100 or more degrees. An independent claim is also included for a closing assembly for a container having a screw cap.

Description

The invention relates to a screw cap made to close the neck of a container.

In known manner, such a cap comprises a base made to be fixed in the neck of a container, a closure cap of the base and a tamper-proof ring connected to the end of the cap by frangible bridges.

The base consists essentially of a hollow cylinder nresentant helical threads on its outer wall. It further has a radial bead, preventing the translation of the tamper band during the unscrewing of the cap.

The cap consists of a hollow cylinder closed at one of its ends by a bottom. It also has helical threads on its inner wall, such that they can engage the threads of the outer wall of the cylinder of the base. Finally, it has an inner skirt protruding from its bottom, sealing the gas by pressing against the end of the base when the cap is completely screwed on the base.

There are caps for packaging for carbonated beverages.

These plugs are subjected to particularly severe sealing constraints because the pressure level of the gas that is trapped in the packaging is high, especially as a result of poor transport and storage conditions.

At the opening of the container and, in particular, at the first opening after rupture of the tamper-evident ring and, under the pressure of the gases, the cap can be violently ejected. There may be accidents to the unsuspecting consumer.

The risks of violent escape of the liquid product and the plug are therefore important and must be absolutely controlled and avoided for safety reasons.

Degassing, or the evacuation of the gases contained in the container, safely, is therefore a sought-after performance, in particular for producing a screw cap for closing a container.

U.S. Patent No. 5,853,095 discloses a plug having a tamper evident ring having at least one non-breakable bridge for removing both the plug and the ring during unscrewing. However document does not provide a means of degassing.

The patent document EP-0 879 182 discloses a screw cap made to evacuate the gases contained in the container during unscrewing.

To do this, the threads of the cap and the base are made offset by an angle of 180 °. Each of the threads extends over an angle of between 240 ° and 360 ° so that the manufacture of the cap and the base is economical, in particular by requiring the least amount of material possible.

To ensure rapid degassing, as soon as the seal between the cap and the base is broken, it is planned to interrupt the threads of the cap and those of the base punctually by recesses parallel to the axis of the base, creating a passage to evacuate the air in the container during the unscrewing of the cap.

In addition, there is provided means for braking the rotational movement of the cap during unscrewing, so as to allow more time gas to evacuate during unscrewing and thus prevent the cap is ejected.

One embodiment of US 4,872,304 evokes a cap allowing the gas to escape before the cap is no longer engaged with the thread of the neck of the bottle to prevent said plug from being ejected. However, this document does not indicate how to evacuate the gas.

US Patent No. 5,462,186 provides for more complex threads, so as to increase the gas discharge rate during the unscrewing of the cap.

In particular, in addition to the transverse recesses provided through the threads, the latter are traversed over their entire length by longitudinal grooves through which the gases can also be evacuated.

However, the structure of these specifically adapted caps for carbonated beverages is complex and their cost is high because of the sealing and safety constraints described above.

At the origin of the invention, the applicant wanted to make a plug for closing a container comprising a non-carbonated beverage, perishable and without preservatives, capable of releasing gases by fermentation.

Indeed, the chemical and / or biological nature of some flat drinks is likely to change over time and according to their storage conditions.

This degradation process is sometimes accompanied by a strong gas emission inside the packaging with a very high pressure level.

Indeed, the Applicant has observed that the fermentation of non-carbonated perishable and preservative-free drinks generated more gas than carbonated drinks, and enough to eject the cap violently and lead to inconvenience of the type previously described.

Also, an object of the invention is to provide a plug which is not ejected during its unscrewing under the pressure of the gases generated in particular by the fermentation of such beverages, the cap to be derived from a simple embodiment, limiting the amount of manufacturing step, in particular by producing the stopper in a single step by molding, to allow the most economical possible realization.

The invention relates in particular to a container closure cap containing a non-carbonated beverage, capable of releasing gases, in particular by fermentation, such as, for example, a fruit juice beverage or a milk-based beverage or tea

For this purpose, the invention relates in particular to a sealing screw cap of the neck of a container containing a non-carbonated beverage, capable of releasing gases, the neck of the container being provided on its outer wall with at least one net external helical. The cap according to the invention comprises a hollow cylinder closed at one of its ends by a bottom, the other end of the hollow cylinder being opened and extended by a tamper-evident ring. The ring is connected to said hollow cylinder by frangible bridges. The hollow cylinder is provided on its inner wall with at least one helical thread whose pitch corresponds to that of the external thread of the neck of the container, to allow screwing of the cap on the neck of the container. The internal and external threads each extend over an angular zone of approximately 380 °, so that the threads remain in engagement over a sufficient angular zone, after rupture of the seal, to prevent the ejection of the plug during the evacuation of gases between the threads in engagement.

It will be considered that the threads are engaged over a sufficient angular zone if, after rupture of the seal, the threads are engaged over an angular zone of at least 100 °.

According to an alternative embodiment of the plug according to the invention, the plug comprises at least two internal helical threads each extending over an angular zone of about 380 ° and being made offset by 180 °.

Such a cap ensures perfectly, during its unscrewing, the evacuation of gases that come in particular from the fermentation of a non-carbonated beverage and which are contained in the container.

To promote evacuation, the plug is especially designed to reduce occasionally the pressure of the gas in the vicinity of the plug, during the unscrewing of the plug and before the rupture of sealing, to reduce the flow of gas leaving the container between the nets.

To do this, the bottom of the cap comprises in particular a protruding annular skirt of length such that it seals in the vicinity of the opening of the neck, by pressing on the inner wall of the neck, on a stroke of the plug of the minus 100 ° after breaking the last frangible bridge, so as to create a gas expansion chamber contained in the container.

The flow rate of the gases leaving the container is thus reduced, and this in particular by maintaining the seal as long as possible after rupture of the frangible bridges.

The invention thus differs from the plugs described in documents EP-0 879 182 and US-5 462 186, the teachings of which make it necessary to produce a plug such that the rupture of the seal occurs as quickly as possible, in order to evacuate the more gas possible when unscrewing.

Thus realized, the stopper according to the invention combines a degassing safety function, preventing the stopper from being ejected, and an anti-sabotage function, consisting in maintaining a sufficient seal, even after rupture of the breakable bridges, so that the drink contained in the container is not brought into contact with the ambient air.

It is considered that the seal is sufficient as long as it is ensured until a rotation of the cap of about 100 ° after rupture of the frangible bridges, or about until the consumer has turned the cap of less than a quarter turn around its axis after breaking all the breakable bridges.

In this way, the invention has the advantage of making available to the consumer a plug which continues to seal even after accidental breakage of frangible bridges.

According to a first embodiment of the plug according to the invention, the skirt has a length at least equal to 0.90 times the pitch of the plug.

According to a second embodiment of the plug according to the invention, the hollow cylinder that comprises the plug has a diameter substantially equal to 38 mm, the pitch of the internal threads of the plug is substantially equal to 7.2 mm and the height of the plug is substantially equal to 14.6 mm.

According to this embodiment, the skirt has a length of 7 mm in particular.

• une embase conçue pour venir se fixer sur le goulot d'un récipient contenant une boisson non carbonatée, susceptible de libérer des gaz, l'embase comprenant un manchon creux à fixer sur ledit goulot du récipient, le manchon comportant au moins un filet hélicoïdal sur sa paroi externe, et
• un bouchon comportant un cylindre creux fermé à l'une de ses extrémités par un fond, l'autre extrémité du cylindre creux du bouchon étant ouverte et prolongée par à une bague formant témoin d'inviolabilité, la bague étant liée à l'extrémité du cylindre par des ponts frangibles, le cylindre creux du bouchon présentant, sur sa paroi interne, au moins un filet hélicoïdal dont le pas correspond à celui du filet externe du manchon de l'embase, pour permettre de visser le bouchon sur l'embase.

The invention also relates to a first assembly comprising

• a base adapted to be fixed on the neck of a container containing a non-carbonated beverage, capable of releasing gases, the base comprising a hollow sleeve to be fixed on said neck of the container, the sleeve comprising at least one helical thread on its outer wall, and
• a stopper comprising a hollow cylinder closed at one of its ends by a bottom, the other end of the hollow cylinder of the stopper being opened and extended by a tamper-evident ring, the ring being connected to the end of the cylinder by frangible bridges, the hollow cylinder of the cap having, on its inner wall, at least one helical thread whose pitch corresponds to that of the external thread of the sleeve of the base, to allow to screw the cap on the base.

According to the invention, the internal and external threads extend over an angular zone of approximately 380 °, so that the threads are engaged over an area angular sufficient, after rupture of sealing, to prevent the ejection of the plug during the evacuation of gases between the threads in engagement.

According to an alternative embodiment of the first assembly according to the invention, the plug comprises in particular at least two internal helical threads each extending over an angular zone of approximately 380 ° and whose ends are offset by 180 ° on the inner wall of the hollow cylinder. In addition, the plug may have the dimensions previously exposed.

According to yet another variant embodiment of the first assembly according to the invention, the bottom of the cap comprises a projecting annular skirt of such length as to seal in the vicinity of the opening of the base fixed on the neck of the container. by pressing against the inner wall of the base when the cap is screwed onto the base, over a course of the stopper of at least 100 ° after breakage of the frangible bridges, so as to create a gas expansion chamber contained in the container before rupture of sealing.

According to yet another variant embodiment of the first assembly according to the invention, the hollow sleeve of the base is provided with at least two threads.

The invention also relates to a second assembly comprising a container for containing a non-carbonated beverage, capable of releasing gases, and a first base / cap assembly, as defined above.

• un récipient destiné à contenir une boisson non carbonatée, susceptible de libérer des gaz, comprenant un goulot sur lequel s'étend au moins un filet externe hélicoïdal s'étendant sur une zone angulaire d'environ 380°, et
• un bouchon à vis de fermeture du goulot tel que défini précédemment.

In addition, the invention provides a third assembly comprising:

• a container for containing a non-carbonated drink capable of releasing gases, comprising a neck on which at least one helical external thread extends over an angular zone of approximately 380 °, and
• a screw closure cap of the neck as defined above.

In particular, in the context of this embodiment of the third assembly according to the invention, the neck of the container may comprise at least two helical threads.

The invention also relates to a screw closure cap of a container containing a possibly carbonated beverage, independently carbonated or not, the cap for the release of gas contained in said container during its unscrewing, especially during a first opening of the container. The cap comprises a hollow cylinder closed at one of its ends by a bottom, the other end being open and extended by a tamper-evident ring, the ring being connected to the hollow cylinder by frangible bridges. According to the invention, the plug is characterized in that the hollow cylinder comprises at least one helical thread on its inner wall which is continuous and which extends over an angular zone of approximately 380 °, so that it is in contact with at least one thread extending over the neck of the container, over a sufficient angular area to prevent ejection of the plug during the evacuation of gases between the threads in engagement, after rupture of sealing.

The invention also relates to a fourth assembly comprising a cap as defined in the preceding paragraph and a container for containing a drink.

Finally, the invention relates to a fifth assembly, made to close a container containing a possibly carbonated beverage, the assembly comprising, as described in documents EP-0 879 182 and US-5 462 186, a cap and a base. The fifth set is designed to allow the release of gas contained in the container during unscrewing of the cap, in particular during a first opening of the container. The cap comprises a hollow cylinder closed at one of its ends by a bottom, the other end being open and extended by a tamper-evident ring, the ring being connected to the end of the hollow cylinder by frangible bridges. . The hollow cylinder having at least one helical thread on its inner wall. The base comprises a hollow sleeve which is made to be fixed on the neck of the container and which comprises at least one helical thread on its outer wall. The fifth set according to the invention is characterized by the fact that the helical threads extend over an angular zone of approximately 380 °, so that the threads are engaged over a sufficient angular zone, after rupture of sealing, to prevent the ejection of the plug during the evacuation of gas between the threads engaged.

• la figure 1 illustre schématiquement, en vue de coupe longitudinale, un bouchon vissé sur une embase avant une première ouverture ;
• la figure 2 représente schématique, en vue de coupe longitudinale, le bouchon et l'embase de la figure 1 après dévissage partiel du bouchon et avant rupture d'un premier pont frangible reliant le bouchon à une bague d'inviolabilité ;
• la figure 3 montre, en vue de coupe longitudinale, le bouchon et l'embase représentés sur les figures 1 et 2, au moment de la rupture du dernier pont frangible reliant le bouchon à la bague d'inviolabilité ;
• la figure 4 illustre schématiquement un filet du bouchon et un filet de l'embase en vue développée, et elle indique les étapes essentielles survenant lors du dévissage du bouchon ; et
• la figure 5 représente une vue en perspective schématique des filets relatifs à un mode de réalisation du bouchon de l'invention monté sur un col de bouteille avec un recouvrement de 147° desdits filets au moment B de la rupture d'étanchéité.

Other objects and advantages of the invention will emerge in the light of the description which follows, with reference to the appended figures, among which:

• Figure 1 illustrates schematically, in longitudinal sectional view, a cap screwed onto a base before a first opening;
• FIG. 2 diagrammatically shows, in longitudinal sectional view, the plug and the base of FIG. 1 after partial unscrewing of the plug and before breaking of a first frangible bridge connecting the plug to a tamper evident ring;
• Figure 3 shows, in longitudinal sectional view, the cap and the base shown in Figures 1 and 2, at the time of rupture of the last frangible bridge connecting the cap to the tamper ring;
• Figure 4 schematically illustrates a thread of the plug and a thread of the base in developed view, and it indicates the essential steps occurring during the unscrewing of the plug; and
• FIG. 5 represents a schematic perspective view of the threads relating to one embodiment of the plug of the invention mounted on a bottle neck with a 147 ° overlap of said threads at the moment B of the sealing rupture.

The embodiment of the invention will now be described relates more particularly to an assembly intended to close hermetically the opening of a container containing a non-carbonated beverage, capable of releasing gases by fermentation, for example a beverage based on milk and fruit.

It should be understood that the forms or dimensions that will be exhibited are only examples given by way of illustration. A plug can meet the definition of the invention as claimed and have different shapes and sizes.

Figures 1 to 3 show an assembly comprising a base 1 designed to be fixed on the neck of a container containing the non-carbonated drink made from milk and fruit.

In order to simplify the figures, the container and the drink have not been shown.

The assembly comprises a screw cap 2 designed to close the base 1 hermetically.

The base 1 comprises a hollow sleeve 11 to be fixed on the neck of the container.

In a conventional manner, the base is pressed force into the neck until an annular bead 12 that it comprises, projecting from the outer wall of the sleeve 11, abuts against the end of the opening of the neck of the container.

The base comprises two helical external threads 13 on the outer wall of the sleeve 11, the ends of the threads 13 being offset by 180 °.

The stopper 2 comprises a hollow cylinder 21 closed at one of its ends by a bottom 22, the other end of the hollow cylinder 21 being open and being extended by a ring 3 forming a tamper evident, the ring being connected to the end of the hollow cylinder by frangible bridges 31.

FIG. 3 in particular shows that the tamperproof ring 3 has an end 32 located opposite the end which is connected to the cap 2 by the frangible bridges 31.

The end 32 has an internal projecting ring 33 forming a shoulder which abuts against a second bead 14 formed projecting from the outer wall of the base, when the cap is unscrewed for the first time.

In this way, the second bead 14 prevent a translation of the ring towards the cap 2 when the latter is unscrewed, and it thus forces the rupture of the frangible bridges 31 during unscrewing.

The hollow cylinder 21 of the plug 2 has, on its inner wall, two helical threads 23 whose pitch corresponds to that of the external threads 13 of the base 1, to allow the plug 2 to be screwed onto the base 1.

The ends of the two threads 23 are offset by 180 °.

According to the invention, and as shown more particularly in Figure 4, the internal threads 23 of the plug extend over an angular zone of 380 °.

FIG. 4 shows in parallel the position of an internal thread 23 and an external thread 13 relative to each other at the moment A when the last frangible bridge 31 breaks.

In Fig. 4, B indicates the position of the end of a thread of the base at the moment when the leakage occurs, and C indicates the position of the end of a thread of the base. at the moment when the cap is clear of the base.

Due to the fact that the flutes 23 of the plug 2 extend over an area of at least 380 °, at the moment A when the last breakable bridge 31 breaks, the threads 23 of the plug and the threads 13 of the base are in an angular zone of more than 200 °, precisely 251 °, as shown in Figure 4.

In this way, degassing safety is ensured. Indeed, the nets are long enough so that, at the moment B of the sealing rupture, the gases escape between them without the plug being ejected.

Also, the plug according to the invention has means ensuring a reduction in the flow of gas leaving the container after rupture of the seal.

These same means ensure gas tightness after rupture of the last frangible bridge and unscrewing of the plug by rotation over an angular zone of about 100 ° or more.

As illustrated in Figures 1 to 3, these means consist of a skirt 24 which is annular and protruding from the bottom 22 of the cap 2, and which is of such length as to seal in the vicinity of the opening of the base 1 fixed on the neck of the container, by pressing against the inner wall 17 of the base 1 when the cap 2 is screwed on the base 1.

So that said skirt seals up to a rotation of about 100 ° of the plug after breaking bridges, it is expected that the skirt has a length at least equal to 0.90 times the pitch of the plug.

The skirt 24 creates a gas expansion chamber contained in the container, in the vicinity of the neck of the container during the unscrewing of the cap and before breaking the seal.

In this way, after sealing rupture, the flow of gas leaving the container between the threads in engagement is less important than if this expansion chamber was not created.

In the context of this embodiment, the hollow cylinder 21 of the plug has a diameter substantially equal to 38 mm, the height of the plug is substantially equal to 14.6 mm and the pitch of internal threads 23 is substantially equal to 7.2 mm.

Also, it is expected that the skirt has a length of 7 mm. The length of the skirt is substantially greater than 0.9 times the pitch of the plug so that the seal break (moment A) occurs, as can be seen in FIG. 4, after a rotation of the plug of 104 ° (251 ° -147 °) after breaking of the last frangible bridge (moment B).

So as to guarantee an optimal seal, there is provided on the bottom 22 of the cap 2 a sealing lip 25, substantially annular and of diameter greater than that of the sealing skirt 24 such that the end of the base 1 come inserted between the lip 25 and the skirt 24 during screwing of the cap.

The lip 25 thus seals in the vicinity of the end of the base 1, on the side of the outer wall of the base 1.

In order to ensure an optimum seal, the skirt 24 and the lip 25 are made of a material that meets the requirements for the preservation of food products, sufficiently flexible to deform, so as to match the shape of the end of the base 1.

The most economical embodiment of the cap according to the invention consists, firstly, in producing the base by injecting plastic material in a mold, and secondly in producing the cap 2 in one piece with the tamperproof ring 3 by injection of plastic into a mold.

One could, however, make the plug 2 by bi-injection of plastic material, a first material of which would be intended to form the plug and a second material would be intended solely to form the skirt and the lip, the first material being more rigid than the second matter.

When closing the container, the plug 2 connected to the ring 3 by the frangible bridges 31 is force-fitted on the base 1, to close the opening of the base 1.

To facilitate the insertion force of the cap 2 connected to the tamper-proof ring 3 on the base 1, the projecting ring 33 of the ring 3 is made to have a substantially triangular section.

The projecting ring 33 thus has a wall whose direction is perpendicular to the axis of the stopper, preventing the translation of the ring towards the stopper by pressing against the second bead 14 of the base.

The projecting ring 33 also has an inclined wall 34 sliding on an inclined wall 16 that the second bead has during the insertion of the cap 2 on the base 1.

The two walls 16 and 34 have a substantially identical direction, to facilitate the passage of the projecting ring 33 under the second bead 14 during the insertion of the cap 2 on the base 1.

For a user to more easily unscrew the cap 2 by hand, a knurling 26 is made on the outer side wall of the hollow cylinder.

For economic reasons, this knurling 26 can be performed at the time of molding, by the presence of striations formed in the plug 2 production mold.

Reference will now be made to the behavior of the plug during a first opening of the container.

Figure 1 shows the cap 2 and the base 1 as they are after manufacture and closure of the container, before a first opening by a user.

It can be seen that the tamper-evident ring 3 is connected to the open end of the cap 2 by frangible bridges 31, and that the skirt 24, as well as the lip 25, seal around the opening of the cap. base 1, respectively by bearing against the inner wall 17 of the base, and by pressing against the end of the base in the vicinity of its outer wall.

A user wishing to open the container, for example to consume the beverage it contains, grasps the cap at the knurling 26 and begins to unscrew the cap 2 by rotating it about its axis.

By unscrewing the cap 2, by the helicoidal shape of the threads, the cap 2 is moved upwards with translational movement, causing a translation movement towards the top of the tamper-evident ring 3 to which it is connected by the frangible bridges 31.

Due to this translational movement, the internal projecting ring 33 of the tamper-proof ring 3 abuts against the second bead 14 of the base 1, and the frangible bridges 31, made in one piece with the stopper and the tamper-proof ring, stretch or stretch, as shown in Figure 2.

Frangible bridges lengthen until they break. FIG. 3 illustrates the position of the plug 2 on the base 1 at the moment when the last breakable bridge has given way, in other words at the moment A indicated in FIG. 4.

Note in Figure 3 that at this time, the seal is always assured.

This has the advantage of guaranteeing the user, as far as possible, that the preservative-free drink contained in the container he wishes to purchase has not been in contact with the ambient air, even if the frangible bridges have been partially broken, for example when handling containers for shelves.

If, however, the container has been opened completely and closed, air has entered and this has led to the oxidation of the liquid, and thus to the emission of gas, the cap of the container will not be ejected under the pressure of these gases during unscrewing.

Indeed, because of the length of the threads, when the user will open the cap, between the moment B of the seal break and the moment C when the cap is clear of the base, the gases will have escaped between the nets .

• l'étanchéité au voisinage de l'ouverture de l'embase 1, au moyen de la jupe 24 au moment A de la rupture du dernier pont frangible (représentation du bouchon au moment A sur la figure 3), et même après durant une rotation du bouchon d'environ 100° ou plus,
• une sécurité au dégazage en empêchant l'éjection du bouchon par une longueur de filets telle que les gaz s'évacuent au travers eux, après rupture d'étanchéité B, sur une zone angulaire de l'ordre de 147° selon la figure 4.

It is clear from the foregoing description that, because of its embodiment, the cap according to the invention ensures:

• sealing in the vicinity of the opening of the base 1, by means of the skirt 24 at the moment A of the breaking of the last frangible bridge (representation of the plug at the moment A in Figure 3), and even after during a rotation cap about 100 ° or more,
• a degassing security by preventing the ejection of the plug by a length of threads such that the gases are discharged through them, after rupture of seal B, over an angular zone of the order of 147 ° according to FIG.

The interlacing of the threads over an angular zone of 147 ° is particularly illustrated in FIG.

Claims (28)

Screw cap (2) for sealing the neck of a container containing a non-carbonated beverage, capable of releasing gases, said neck being provided on its outer wall with at least one helical external thread, said stopper comprising a hollow cylinder (21) closed at one of its ends by a bottom (22), the other end of the hollow cylinder (21) being open and extended by a ring (3) forming tamper evident, said ring being connected to said cylinder hollow by frangible bridges (31), said hollow cylinder being provided, on its inner wall, with at least one helical thread (23) whose pitch corresponds to that of the external thread of the neck of the container, to allow screwing the cap (2) on the neck of the container, said internal (23) and external threads each extending over an angular zone of about 380 °, so that the threads remain in engagement, after rupture of the seal, for prevent the ejection of the plug (2) p the evacuation of gases between the threads in engagement. Screw cap (2) according to claim 1, characterized in that it comprises at least two internal helical threads (23) each extending over an angular zone of approximately 380 ° and whose ends are offset by 180 ° on the inner wall of the hollow cylinder (21). Screw cap (2) according to claim 1 or 2, characterized in that said threads are of such length that they are engaged over an angular zone of at least 100 ° after rupture of the seal. Screw cap (2) according to any one of claims 1 to 3, characterized in that said bottom has a projecting annular skirt (24) of such length as to seal in the vicinity of the opening of the neck, by pressing on the inner wall of the neck, on a stroke of the plug (2) of at least 100 ° after breaking the last frangible bridge (31), so as to create a gas expansion chamber contained in the container before rupture sealing. Screw cap (2) according to claim 4, characterized in that said skirt has a length at least equal to 0.90 times the pitch of the plug (2). Screw cap (2) according to any one of the preceding claims, characterized in that the hollow cylinder (21) has a diameter substantially equal to 38 mm, in that the pitch of the internal thread (s) (s) ( s) (23) is substantially equal to 7.2 mm and in that the height of the plug (2) is substantially equal to 14.6 mm. Screw cap (2) according to claim 5 or 6, characterized in that said skirt has a length of 7 mm. Ensemble comprising - a base (1) designed to be fixed on the neck of a container containing a non-carbonated beverage, capable of releasing gas, said base comprising a hollow sleeve (11) to be fixed on said neck of said container, said sleeve comprising at least one helical thread (13) on its outer wall, and - a plug (2) comprising a hollow cylinder (21) closed at one end by a bottom (22), the other end of the hollow cylinder (21) of the plug (2) being open and extended by a ring (3) forming inviolability indicators, said ring being connected to the end of said cylinder by frangible bridges (31), said hollow cylinder of the plug (2) having, on its inner wall, at least one helical thread (23). ) whose pitch corresponds to that of the external thread (13) of the sleeve (11) of said base, to enable the cap (2) to be screwed onto the base (1), said internal (23) and external (13) threads extending over an angular zone of approximately 380 °, so that the threads (13, 23) are engaged over a sufficient angular zone, after rupture of seal , to prevent ejection of the plug (2) during the evacuation of gases between the threads (13, 23) in engagement. Assembly comprising a base (1) and a plug (2) according to claim 8, characterized in that the bottom (22) of said cap comprises a projecting annular skirt (24) of such length as to seal in the vicinity of the opening of the base (1) fixed on the neck of the container, by pressing against the inner wall (17) of the base (1) when the cap (2) is screwed onto the base (1), on a stroke of the plug (2) of at least 100 ° after rupture of the frangible bridges (31), so as to create a gas expansion chamber contained in the container before breaking. An assembly comprising a base (1) and a plug (2) according to claim 9, comprising a plug (2) according to any one of claims 2, 5, 6 or 7. Assembly comprising a base (1) and a plug (2) according to any one of claims 8 to 10, characterized in that the hollow sleeve (11) of the base (1) is provided with at least two threads ( 13). An assembly comprising a container for containing a non-carbonated beverage, capable of releasing gases, and an assembly according to any one of claims 8 to 11. Set comprising: a container intended to contain a non-carbonated drink, capable of releasing gases, comprising a neck on which at least one helical external thread extends extending over an angular zone of approximately 380 °, and - A screw cap (2) closing the neck of the container according to any one of claims 1 to 7. An assembly comprising a container and a stopper (2) according to claim 13, characterized in that said neck of the container comprises at least two helical threads. Screw cap (2) for sealing a container containing a possibly carbonated beverage, said plug allowing the release of gas contained in said container during its unscrewing, in particular during a first opening of the container, said plug having a hollow cylinder (21) closed at one of its ends by a bottom (22), the other end being open and extended by a ring (3) forming tamper evident, said ring being connected to said hollow cylinder by bridges frangibles (31), said hollow cylinder having at least one helical thread (23) on its inner wall, characterized in that said thread is continuous and extends over an angular zone of about 380 °, so that it is in contact with at least one thread that extends over the neck of said container, over a sufficient angular zone to prevent ejection of the plug (2) during the evacuation of the gases between the threads in engagement, after rupture of eta nchéité. Screw cap (2) according to claim 15, characterized in that it comprises at least two internal helical threads (23) each extending over an angular zone of approximately 380 ° and whose ends are offset by 180 ° on the inner wall of the hollow cylinder (21). Screw cap (2) according to any one of claims 15 or 16, characterized in that said bottom comprises a projecting annular skirt (24) of such length as to seal near the opening of the neck, by pressing on the inner wall of the neck, on a stroke of the plug (2) of at least 100 ° after rupture of the frangible bridges, so as to create a gas expansion chamber contained in the container before rupture of sealing. Screw cap (2) according to claim 17, characterized in that said skirt has a length at least equal to 0.90 times the pitch of the plug (2). Screw cap (2) according to any one of Claims 15 to 18, characterized in that the hollow cylinder (21) has a diameter substantially equal to 38 mm, in that the pitch of the thread (s) internal (s) (23) is substantially equal to 7.2 mm and in that the height of the plug (2) is substantially equal to 14.6 mm. Screw cap (2) according to claim 18 or 19, characterized in that said skirt has a length of 7 mm. An assembly comprising a container for holding a beverage and a stopper (2) according to any one of claims 15 to 20 Closing assembly for a container for containing a possibly carbonated drink, comprising a stopper (2) and a base (1), said assembly being designed to allow the release of gas contained in the container during the unscrewing of the stopper (2). ), in particular during a first opening of the container, said cap comprising a hollow cylinder (21) closed at one of its ends by a bottom (22), the other end being open and extended by a ring (3) tamper-proof indicator, said ring being connected to the end of the hollow cylinder (21) by frangible bridges (31), said hollow cylinder having at least one helical thread (23) on its inner wall, the base (1). ) comprising a hollow sleeve (11) which is designed to be fixed on the neck of said container and which has at least one helical thread (13) on its outer wall, characterized in that said helical threads (13, 23) extend on an ang approximately 380 °, so that the threads (13, 23) are engaged over a sufficient angular zone, after rupture of sealing, to prevent the ejection of the plug (2) during the evacuation of gases between the threads (13, 23) in engagement. Assembly comprising a plug (2) and a base (1) according to claim 22, characterized in that the cylinder of the plug (2) comprises at least two internal helical threads (23) each extending over an angular zone of about 380 ° and whose ends are offset by 180 ° on the inner wall of the hollow cylinder (21). Assembly comprising a plug (2) and a base (1) according to claim 22 or 23, characterized in that said bottom of said plug has a protruding annular skirt (24) of such length as to seal in the vicinity of the opening of the neck, by pressing on the inner wall of the neck, on a stroke of the stopper (2) of at least 100 ° after rupture of the frangible bridges (31), so as to create a gas expansion chamber contained in the container before breaking. Assembly comprising a plug (2) and a base (1) according to claim 24, characterized in that said skirt has a length at least equal to 0.90 times the pitch of the plug (2). Assembly comprising a plug (2) and a base (1) according to any one of claims 23 to 25, characterized in that the hollow cylinder (21) of the plug (2) has a diameter substantially equal to 38 mm, in that that the pitch of (or) internal thread (s) (23) is substantially equal to 7.2 mm and in that the height of the plug (2) is substantially equal to 14.6 mm. Assembly comprising a plug (2) and a base (1) according to claim 25 or 26, characterized in that said skirt has a length of 7 mm. Assembly comprising a plug (2) and a base (1) according to any one of claims 22 to 27, characterized in that said hollow sleeve of the base (1) is provided with at least two threads (13).

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