Closure for a container

Abstract

A closure (100) comprises a cap (101) and a tubular body (1) comprising an upper portion (2), a lower portion (3) opposite the upper portion (2), and at least one annular retention member (10) formed on the lower portion (3) and configured to engage a protruding collar (202) of a neck of a container to retain the tubular body (1) on the neck. The tubular body (1) also comprises a frangible portion (6) connecting the upper portion (2) to the lower portion (3) and arranged to separate it at least in part from the lower portion (3) upon first opening to release the cap (101). The tubular body, between the annular retention member and an upper end (20) of the upper portion (2), has a minimum inner diameter greater than the minimum inner diameter of the annular retention member (10). The cap (101) is attached to the tubular body at the upper end (20).

Description

[0001] "Closure for a container"

[0002] DESCRIPTION

[0003] The present invention relates to a closure, in particular a container for liquids. Description of the prior art

[0004] GB 2 285 623 describes a closure comprising a pouring device defining a pouring orifice, a skirt for attaching the pouring device to the neck of the container, a cap adapted to engage and disengage the pouring device for closing the pouring orifice and a hood that entirely surrounds the skirt and the cap and has an annular portion that engages a lower portion of the skirt in a stable manner. The hood comprises a tear off tab configured so as to leave the annular portion in engagement with the skirt when the tear off tab is tom off so as to give evidence of the occurred first opening of the closure.

[0005] EP 1 818 272 describes a closure comprising a cap adapted to engage and disengage the pouring orifice of a pouring device attached to the mouth of a container and a hood that surrounds the cap and has an annular portion that stably engages the neck of the container. The cap comprises a tear-off tab configured so as to leave the annular portion in engagement with the neck of the container when the tear-off tab is torn off so as to give evidence of the occurred first opening of the closure.

[0006] US 5,667,086 describes a tamper-evident closure comprising a cap connected by means of a frangible portion to a skirt attached to the neck of a container and a hood that surrounds the cap and, by means of the skirt of the cap, is attached to the neck of the container. The hood comprises a lower portion and an upper portion. The upper portion is provided with a tear-off tab which, when torn off, allows the upper portion to be removed leaving the lower portion fixed to the skirt of the cap and, by means of this, to the neck of the container.

[0007] Other examples of closures are described in EP 3031743, EP 2897876 and EP 3397567.

[0008] WO 2013 / 132384 describes a closure formed by an outer tubular member and an inner cap attached by a mechanical coupling to the outer tubular member. The tubular member includes a lower portion and an upper portion connected by a frangible portion of a tear-off seal, the frangible portion being adapted to break upon first opening. The upper portion of the tubular member terminates at the top with an annular edge projecting radially inwardly above the cap. The tubular member is equipped with axial attachment members that abut with corresponding axial attachment members formed on the neck of the container to prevent tampering the closure from the neck of the container. The annular edge of the tubular member protruding radially inwards defines an upper abutment for the inner cap that limits, during the moulding of the tubular member itself, the conformation of the axial attachment members.

[0009] WO 2020 / 136985 describes a closure formed by an outer tubular member equipped with a tear-off seal and an inner cap, also equipped with a tear-off seal, integrally formed with the outer tubular member. The inner cap is connected to the outer tubular member by means of frangible members at the base of the cap itself.

[0010] Disadvantageously, in this type of known closure it is relatively easy to unseat the closure from the container while keeping it intact. Accordingly, a malicious and sufficiently skilled individual can remove the product contained in the container, e.g. a fine liquor, replace it with a counterfeit or even damaged product and subsequently reapply the closure on the container.

[0011] SUMMARY OF THE INVENTION

[0012] In this context, the technical task underlying the present invention is to propose a closure which overcomes the drawbacks of the prior art mentioned above.

[0013] In particular, it is an object of the present invention to provide a closure able to further reduce the possibilities of detaching the closure from the neck of the container.

[0014] The technical task mentioned and the objects stated are substantially achieved by a closure comprising the technical features set out in one or more of the appended claims.

[0015] Advantages of the invention

[0016] Advantageously, the inventors have found that the conformation of the tubular body and the retention members for the container as well as the fixing of the cap to the tubular body make it possible to define an upper annular surface substantially perpendicular to the central axis, which is able to make more grip on the collar of a container and, consequently, make it almost impossible to remove the closure from the container without breaking it or deforming it irreversibly.

[0017] LIST OF FIGURES

[0018] Further features and advantages of the present invention will become more apparent from the description of an exemplary, but not exclusive, and therefore nonlimiting preferred embodiment of a closure, as illustrated in the appended drawings, wherein:

[0019] - Figure 1 is a perspective view of a first embodiment of a closure according to the present invention;

[0020] - Figure 2a is a lateral sectional view of a detail of the closure of Figure 1;

[0021] - Figure 2b is a lateral sectional view of the closure of Figures 1 and 2a applied to the neck of a container;

[0022] - Figure 2c shows an enlargement of a detail of the closure of Figure 2a;

[0023] - Figure 3 a is a lateral sectional view of a second embodiment of the closure according to the present invention;

[0024] - Figure 3b is a lateral sectional view of the closure of Figure 3a applied to the neck of a container;

[0025] - Figure 4a is a lateral sectional view of a third embodiment of the closure according to the present invention;

[0026] - Figure 4b is a lateral sectional view of the closure of Figure 4a applied to the neck of a container;

[0027] - Figure 5a is a lateral sectional view of a fourth embodiment of the closure according to the present invention;

[0028] - Figure 5b is a lateral sectional view of the closure of Figure 5a applied to the neck of a container;

[0029] - Figure 6a is a lateral sectional view of a fifth embodiment of the closure according to the present invention; and

[0030] - Figure 6b is a lateral sectional view of the closure of Figure 6a applied to the neck of a container;

[0031] - Figure 7a is a perspective view of a sixth embodiment of the closure according to the present invention;

[0032] - Figure 7b is a lateral sectional view of the closure of Figure 7a applied to the neck of a container;

[0033] - Figure 8a is a lateral sectional view of a seventh embodiment of the closure according to the present invention;

[0034] - Figure 8b is a lateral sectional view of the closure of Figure 8a applied to the neck of a container;

[0035] - Figure 9 is a perspective view of an eighth embodiment of a closure according to the present invention;

[0036] - Figure 10a is a lateral sectional view of the closure of Figure 9;

[0037] - Figure 10b is a lateral sectional view of the closure of Figure 9 and 10a applied to the neck of a container;

[0038] - Figure I la is a perspective view of the closure of Figure 9 in a different configuration;

[0039] - Figure 1 lb is a lateral sectional view of the closure of Figure I la applied to the neck of a container;

[0040] - Figure 12 is a perspective view of a ninth embodiment of a closure according to the present invention;

[0041] - Figure 13a is a lateral sectional view of the closure of Figure 12;

[0042] - Figure 13b is a lateral sectional view of the closure of Figure 12 and 13a applied to the neck of a container;

[0043] - Figure 14a is a perspective view of the closure of Figure 12 in a different configuration;

[0044] - Figure 14b is a lateral sectional view of the closure of Figure 14a applied to the neck of a container;

[0045] - Figure 15a is a perspective view of the closure of Figure 12 and 14a in a different configuration;

[0046] - Figure 15b is a lateral sectional view of the closure of Figure 15a applied to the neck of a container.

[0047] DETAILED DESCRIPTION

[0048] With reference to the appended figures, the number 100 generally indicates a closure in accordance with the present invention.

[0049] The closure 100 is configured to be applied to a container, for example a bottle, having a neck 200 with a pouring orifice 201 for pouring the liquid present in the container.

[0050] The closure 100 may be suitable for application on both plastic and glass bottles.

[0051] The neck 200 has an externally projecting collar 202. The collar 202 can be defined by an annular bulge made on the external surface of the neck 200, near the pouring orifice 201.

[0052] In the context of the present invention, neck 200 of the container means a neck of a bottle or, alternatively, a pourer attached to the neck of the bottle. In the following present description, reference will be made to the preferred embodiment wherein the closure 100 is applicable to the neck of the bottle. The closure 100 comprises a tubular body 1 configured to be attached to the neck 200. The tubular body 1 has a central axis A extending along a longitudinal direction X-X.

[0053] The tubular body 1 comprises an upper portion 2 having an upper end 20, and a lower portion 3, opposite the upper portion 2 and having a lower end 21. The tubular body 1 thus extends along the longitudinal direction X-X between the upper end 20 and the lower end 21.

[0054] The tubular body 1 is preferably made of a plastic material, in particular polyolefin, by way of example only polyethylene.

[0055] The closure 100 further comprises a cap 101 arranged at least partially internally of the tubular body 1 and attached to the tubular body 1. The cap 101 is configured to close the pouring orifice 201.

[0056] In the embodiments of Figures 3a, 3b, 6a-7b, 9-15b, the cap 101 is arranged entirely internally of the tubular body 1.

[0057] In the embodiments of Figures l-2b, 4a-5b, 8a, 8b, a part of the cap 101 overhangs the upper end 20 of the tubular body 20 along the longitudinal direction X- X.

[0058] The cap 101 is attached to the tubular body 1 at the upper end 20 of the tubular body 1. It should therefore be noted that the cap 101 represents a separate element from the tubular body 1. In other words, the cap 101 and the tubular body 1 are made separately, and are subsequently attached to each other to define the closure 100. More details on the closure 100 and the cap 101 will be provided later in the present disclosure.

[0059] In more detail, the upper portion 2 of the tubular body 1 faces the cap 101 and at least partially surrounds the cap 101. The upper portion 2 being directly attached to the cap 101 makes it possible to retain the aforementioned cap 101 on the pouring orifice 201 when the closure 100 is mounted on the neck 200. The tubular body 1 further comprises a frangible portion 6 that connects the upper portion 2 to the lower portion 3. The frangible portion 6 is configured to separate the upper portion 2 at least in part from the lower portion 3 upon first opening to release the cap 101. To release the cap 101 means that the attachment between the cap 101 and the neck 200, which exists due to the attachment between the tubular body 1 and the neck 200 of the container, is removed.

[0060] In the illustrated embodiments, the frangible portion 6 is defined by a frangible annular weakening zone 9 located at the upper portion 2. By way of example, the frangible portion 6 can be made by a plurality of bridges or by reducing the thickness of the tubular body 1.

[0061] It should be noted that since the cap 101 is attached to the upper portion 2, the removal of the cap 101 itself from the pouring orifice 201 necessarily involves the removal of the upper portion 2 from the neck 200, which remains attached to the cap 101. Note that evidence of first opening is provided by the frangible portion 6.

[0062] The tubular body 1 further comprises an annular retention member 10, formed on the lower portion 3 and having a minimum internal diameter.

[0063] The annular retention member 10 is configured to engage the collar 202 to retain the tubular body 1 on the neck 200.

[0064] According to one aspect, the annular retention member 10 projects from a wall of the tubular body 1, and in particular of the lower portion 3, internally towards the central axis A. It should be noted that, when the closure 100 is applied to the neck 200 of the container, the annular retention member 10 is arranged on the opposite side of the pouring orifice 201 with respect to the collar 202 so as to retain the tubular body 1 on the neck 200 and prevent the lower portion 3 to be removed from the neck 200.

[0065] If the closure 100 is mounted on a pourer, the annular retention member 10 may be attached to an annular protrusion of the pourer, so that it is indirectly attached to the neck 200 of the container. According to the invention, the tubular body 1, in the section between the annular retention member 10 and the upper end 20, has a minimum inner diameter greater than the minimum inner diameter of the annular retention member 10,

[0066] Advantageously, with this geometry of the tubular body 1 it is possible to manufacture the aforementioned tubular body 1 separately from the cap 101, in particular by means of an injection moulding process. In more detail, during injection moulding it is possible to insert the male mold from the side corresponding to the upper portion 2, in particular to the upper end 20, in order to obtain a smaller diameter at the annular retention member 10 compared to the remaining upper part of the tubular body 1. The geometry of the annular retention member 10 obtainable by the aforementioned process will be more detailed in the following of the present description.

[0067] It should be noted that the tubular body 1, and in particular the annular retention member 10, nevertheless has a minimum radial extension greater than the radius of the pouring orifice 201 of the container, so as to define a minimum tubular passage having a radius at least equal to the outer radius of the pouring orifice 201.

[0068] In accordance with the embodiments illustrated in Figures 2a, 3a, 5a, 6a, 8a, 10a and 13a, the annular retention member 10 may be defined by a plurality of annular segments 11 separated from one another, for example by respective discontinuities 12. By way of example, the annular segments 11 have a polygonal shape, for example triangular or trapezoidal.

[0069] Alternatively, as illustrated in Figure 4a, the annular retention member 10 may be made in one piece.

[0070] The upper end 20 of the upper portion 2 comprises an inner perimeter edge 23.

[0071] The cap 101 comprises a head wall 102 having a coupling edge 103. It should be noted that in the embodiments illustrated in Figures l-2b, 4a-5b, 8a, 8b, the part of the cap 101 overhanging the upper end 20 of the tubular body 1 is defined by the head wall 102. The coupling edge 103 is attached to the perimeter edge 23 of the upper end 20 of the tubular body 1.

[0072] In accordance with embodiments of the present invention, illustrated in Figures 1 -5b, 10a- 1 lb, the coupling edge 103 is welded to the perimeter edge 23. In more detail, during the assembly of the closure 100, the cap 101 is welded at the upper end 20, and in particular at the perimeter edge 23, after the tubular body 1 has been manufactured.

[0073] According to one embodiment, illustrated in Figures 9-10b, the perimeter edge 23 comprises a recess 24, while the coupling edge 103 comprises a projection 104 protruding from the head wall 102 and adapted to be inserted and attached to the recess 24. In more detail, the projection 104 abuts in the recess 24 and is welded internally to the recess 24.

[0074] In accordance with alternative embodiments, shown in Figures 6a-7b and 11a- 15b, the coupling edge 103 is removably connected to the perimeter edge 23. More in detail, the coupling edge 103 is connected by snap coupling to the perimeter edge 23.

[0075] According to one of the aforementioned embodiments, shown in Figures 11a- 15b, the perimeter edge 23 comprises an annular projection 25 protruding from a side wall of the perimeter edge 23 towards the inside of the closure 100, while the coupling edge 103 comprises an annular seat 105 formed on a side wall of the coupling edge 103, transverse to the head wall 102, and adapted to receive the annular projection 25. In more detail, during the assembly of the closure 100, the cap 101 is inserted inside the upper portion 2 until the annular projection 25 snaps into the annular seat 105.

[0076] Note that embodiments wherein the annular seat 105 is formed in the perimeter edge 23 while the annular projection 25 is formed in the coupling edge 103 are also intended to be included in the present description, as for example shown in Figures 6a- 7b.

[0077] It should be noted that in the aforementioned embodiments wherein the perimeter edge 23 and the coupling edge 103 are connected by snap coupling, after first opening, the cap 101 is separable from the upper portion 2 by detaching the annular projection 25 from the annular seat 105, after the separation of the upper portion 2 from the lower portion 3, i.e. after the first opening. This advantageously makes it possible to properly recycle the cap 101 and the upper portion 2 of the closure 100 if they are made of different materials.

[0078] In accordance with the present invention, the perimeter edge 23 of the upper portion 2 has a characteristic dimension at least equal to 90% of the diameter of the tubular body 1. "Characteristic dimension" means in particular the dimension that most characterises the perimeter edge 23 as a function of its shape. For example, if the perimeter edge 23 is circular, the characteristic dimension corresponds to the innermost diameter of said perimeter edge 23. Similarly, if the perimeter edge 23 is square, the characteristic dimension is given by the innermost side.

[0079] It should be noted that the characteristic dimension of the perimeter edge 23 of the upper portion 2 must be greater than the minimum internal diameter of the annular retention member 10.

[0080] Advantageously, as anticipated, this difference between the minimum internal diameter of the annular retention member 10 and that of the section between the annular retention member 10 and the upper end 20, thus including the perimeter edge 23, favours the creation of the tubular body 1 by moulding, allowing the insertion of the male mold through the upper end 20, and in particular through the perimeter edge 23.

[0081] According to a preferred aspect, shown for example in Figure 2c, the annular retention member 10 has at least one upper annular surface 13, which is configured to abut on the collar 202. The upper annular surface 13 is substantially flat. Said upper annular surface 13 is preferably inclined with respect to the central axis "A" by an angle a comprised between 85° and 95°, more preferably between 90° and 95°, optionally converging towards the pouring orifice 201 of the container.

[0082] It should be noted that in the embodiment of the closure 100, the insertion of the male mold from the upper end 20 makes it possible to realize the upper annular surface 13 as defined above. Indeed, for alternative geometries, for example in the presence of bulges or protrusions in the section between the annular retention member 10 and the upper end 20, the upper annular surface 13 as defined above would not be feasible.

[0083] According to one embodiment of the present invention, the annular retention member 10 has a thickness greater than 0.1 mm at a free end. In detail, the annular retention member 10 has an edge surface 14 which is defined at the free end. The edge surface 14 is inclined relative to the upper annular surface 13 by an angle of between 85° and 95°.

[0084] In accordance with the embodiment of the invention, the annular retention member 10 has a substantially constant thickness along a radial direction. Alternatively, the thickness of the annular retention member 10 is variable, in particular it decreases in the direction of the central axis "A" until a minimum thickness is reached at the free end. Note that the minimum thickness is still greater than zero.

[0085] According to one aspect, the annular retention member 10 has an annular sliding surface 15 opposite the upper annular surface 13. The annular sliding surface 15 can be horizontal, or it can be arranged obliquely with respect to the central axis "A" to facilitate the application of the tubular body 1 on the neck 100.

[0086] In accordance with preferred embodiments of the invention, the upper portion 2 has, at the upper end 20, an outer radial extension of the perimeter edge equal to or less than 1.5 mm, preferably equal to or less than 1 mm.

[0087] According to one aspect, the upper portion 2 is defined by an upper side wall 7 that extends substantially parallel to the central axis "A" of the tubular body 1. In use, the upper side wall 7 at least partly surrounds the cap 101. The upper side wall 7 has the upper end 20, and a lower end 7a opposite to the upper end 20.

[0088] According to the same aspect, the lower portion 3 is defined by a lower side wall 4 extending substantially parallel to the central axis "A" of the tubular body 1. In use, the lower side wall 4 at least partly surrounds the neck 200 of the container. The lower side wall 4 has an upper end 4a, and the lower end 21 opposite to the upper end 4a. In the described embodiments, the lower end 21 is a free end of the lower side wall 4.

[0089] Note that the annular retention member 10 therefore projects from the lower side wall 4 internally of the closure 100.

[0090] According to one embodiment, the upper end 4a of the lower side wall 4 may be facing the upper portion 2 and connected to the lower end 7a of the upper wall 7 of the upper portion 2 by the frangible portion 6.

[0091] Optionally, the tubular body 1 may comprise an intermediate portion 5 arranged between the upper portion 2 and the lower portion 3, as shown for example in Figures l-3b, 5a-13b. More in detail, the intermediate portion 5 is connected by the frangible portion 6 to the upper portion 2.

[0092] In this embodiment, the lower end 7a of the upper side wall 7 faces the intermediate portion 5 and is joined to the intermediate portion 5, similarly the upper end 4a of the lower side wall 4 faces the intermediate portion 5 and is joined, welded or connected, to the intermediate portion 5.

[0093] According to the same aspect described above, the intermediate portion 5, if present, is defined by an intermediate side wall 8, which extends substantially parallel to the central axis "A" of the tubular body 1. The intermediate side wall 8 has an upper end 8a, and a lower end 8b opposite to the upper end 8a. In the described embodiments, the lower end 8b of the intermediate side wall 8 faces the lower portion 3. The upper end 8a of the intermediate side wall 8 faces the upper portion 2.

[0094] In the illustrated embodiments, the frangible portion 6 connects the upper portion 2 and the intermediate portion 5, so as to indirectly connect the upper portion 2 and the lower portion 3.

[0095] In accordance with the aforementioned embodiments shown in the aforementioned figures, the intermediate portion 5 comprises a seal removable upon first opening of the closure 100, for example a tear-off seal, adapted to perform a tamper-evident function.

[0096] In accordance with the embodiment of Figures 12-15b, the closure 100 can comprise two different tear-off seals, a first seal defined by the intermediate portion 5, and a second seal defined by a further portion 19 adapted to stably couple the cap 101 to the neck 200. Note that the first seal 5 is removable before the second seal 19. Bottle closures comprising two tear-off seals are known in the art and will therefore not be described further.

[0097] According to one aspect, illustrated for example in Figures 6a, 6b, 7a and 7b, when the tubular body 1 comprises the aforementioned intermediate portion 5, the annular retention member 10 can be arranged between the intermediate portion 5 and the upper end 4a of the lower portion 3.

[0098] According to the same aspect, the tubular body 1 comprises a plurality of frangible connecting elements 16 connecting the intermediate portion 5 and the annular retention member 10 and / or the lower portion 3 and the lower portion 5. In other words, the upper annular surface 13 is not continuous with the lower 4 and intermediate 8 side walls.

[0099] According to one embodiment, shown for example in Figure 7a, the tubular body 1 has a plurality of windows 17, each defined by a pair of adjacent connecting elements 16. Advantageously, the windows 17 make it possible to inspect the abutment zone of the retention ring 10 to check whether there has been tampering.

[0100] Alternatively, or in addition, the tubular body 1 may comprise an inspection wall 18, which is located at the annular retention member 10, as shown for example in Figures 6a and 6b. The inspection wall 18 is at least in part transparent so as to allow inspection of the integrity of the connecting elements 16 by the user to verify the integrity of the closure 100. Advantageously, the inspection wall 18 can be realized as part of the first tear- off seal, i.e. of the intermediate part 5. Still advantageously, the inspection wall 18 can be made of a material distinct from the rest of the tubular body 1, in particular by means of a bi-inj ection moulding process.

[0101] According to one aspect, the cap 101 has an outer surface and an inner surface. The outer surface corresponds to that part of the cap 101 that can be gripped by a user, together with the upper portion 2 of the tubular body 1, for opening and closing operations.

[0102] According to the same aspect, the cap 101 comprises a connection portion 106 protruding from the head wall 102 along the longitudinal direction X-X and configured to be inserted internally of the pouring orifice 201 to abut against an inner surface of the neck 200.

[0103] According to one embodiment, shown for example in Figure 2a, the cap 101 comprises attachment members 107 adapted to reversibly attach the cap 101 to the neck 200 of the container, so as to be able to carry out the normal opening and closing operations. Preferably, the attachment members 107 comprise a thread formed on the inner surface of the cap 101 and engageable with a corresponding thread 108 formed on the outer surface of the neck 200 at the container 2 pouring orifice 201. Alternatively, the attachment members 107 may comprise snap-on hooking members (not illustrated) for flip-top type plugs.

Claims

CLAIMS1. Closure (100) for a container having a neck (200) with a pouring orifice (201), the neck (200) having a protruding collar (202), the closure (100) having a central axis (A) extending along a longitudinal direction (X-X) and comprising:- a tubular body (1) configured to be fixed to the neck (200),- a cap (101) arranged at least partially inside the tubular body (1) and attached to the tubular body (1), the cap (100) being configured to close the pouring orifice (201); wherein the tubular body (1) comprises:- an upper portion (2) having an upper end (20);- a lower portion (3) having a lower end (21), the tubular body (1) extending along the longitudinal direction (X-X) between the upper end (20) and the lower end (21);- a frangible portion (6) connecting the upper portion (2) to the lower portion (3) and configured to separate the upper portion (2) at least in part from the lower portion (3) upon first opening to release the cap (101);- an annular retention member (10) formed on the lower portion (3) and configured to engage the collar (202) to retain the tubular body (1) on the neck (200), the annular retention member (10) having a minimum inner diameter; wherein:- the tubular body (1), in the section between the annular retention member (10) and the upper end (20), has a minimum inner diameter greater than the minimum inner diameter of the annular retention member (10),- the cap (101) is attached to the tubular body (1) at the upper end (20), characterized in that:- the upper end (20) comprises a peripheral edge (23),- the cap (101) comprises a top wall (102) having a coupling edge (103), the coupling edge (103) of the top wall (102) being attached to the peripheral edge (23) of the upperend (20) of the tubular body (1).

2. Closure (100) according to claim 1, wherein the coupling edge (103) is welded to the peripheral edge (23).

3. Closure (100) according to claim 2, wherein the coupling edge (103) comprises a protrusion (104) projecting from the top wall (102), the peripheral edge (23) comprising a recess (24) adapted to receive said protrusion (104), the protrusion (104) being welded inside the recess (24).

4. Closure (100) according to claim 1, wherein the coupling edge (103) is removably connected to the peripheral edge (23), preferably by means of a snap coupling.

5. Closure (100) according to claim 4, wherein the coupling edge (103) comprises an annular seat (105), the peripheral edge (23) comprising an annular protrusion (25) connected by snap coupling to the annular seat (105).

6. Closure (100) according to any one of claims 1 to 5, wherein the annular retention member (10) has an upper annular surface (13) configured to abut on the collar (202) and inclined with respect to the central axis (A) by an angle (a) comprised between 90° and 95°.

7. Closure (100) according to claim 6, wherein the upper annular surface (13) is substantially flat.

8. Closure (100) according to any one of claims 1 to 7, wherein the annular retention member (10) is defined by a plurality of annular segments (11) separated from eachother.

9. Closure (100) according to any one of claims 1 to 8, wherein the annular retention member (10) has an annular sliding surface (15) arranged obliquely with respect to the central axis (A) adapted to facilitate mounting of the tubular body (1) on the neck (200).

10. Closure (100) according to any one of claims 1 to 9, comprising an intermediate portion (5) arranged between the upper portion (2) and the lower portion (3) and connected by means of the frangible portion (6) to the upper portion (2), the annular retention member (10) being arranged between the intermediate portion (5) and an upper end (4a) of the lower portion (3).

11. Closure (100) according to claim 10, comprising a plurality of frangible connecting elements (16) connecting the intermediate portion (5) and the annular retention member (10) and / or the intermediate portion (5) and the lower portion (3).

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