Lid for container

Abstract

A cap for a container, comprising a side wall (2) extending about an axis (Z) and a transverse wall (3) arranged transversely to the axis (Z), on which side wall (2) a separation line (4) is provided for defining: a retaining ring (5) intended to remain anchored to the neck of the container; and a closure element (6) removably engageable with the neck to open or close the container. The separation line (4) extends about the axis (Z) and is interrupted in the circumferential direction to define a joining portion (8) joining the retaining ring (5) and the closure element (6). The cover (1) also has a cut-out line (21) which extends in the side wall (2) transversely to the axis (Z) such that the separation line (4) is axially interposed between the retaining ring (5) and the cut-out line (21). Two connecting bands are defined between the separation line (4) and the cut-out line (21) to keep the closure element (6) connected to the retaining ring (5).

Description

[0001] This application is a divisional application of the Chinese patent invention application "Lid for closing a container" with an application date of July 7, 2020 and application number 202080053679.4. Technical Field

[0002] The present invention relates to a cap for a container, in particular to a cap having a retaining ring that can be associated with a container neck, the cap also having a closure element that remains connected to the retaining ring after opening. The cap according to the invention is particularly, but not exclusively, suitable for application to bottles intended to contain liquid substances. Background Art

[0003] The prior art cap for bottles comprises a cup-shaped body provided with an internal thread adapted to engage with an external thread of the neck of the bottle. The prior art cap is also provided with an anti-tampering ring connected to the cup-shaped body by a plurality of breakable elements. When the cap is opened for the first time, the cup-shaped body is separated from the anti-tampering ring as the breakable elements break. The anti-tampering ring remains associated with the neck of the bottle, while the cup-shaped body can be unscrewed by the user, who in doing so separates the cup-shaped body from the bottle to access the contents of the bottle. The cup-shaped body can then be screwed back onto the neck to close the bottle again.

[0004] Sometimes, after the bottle has been emptied, the user intentionally or accidentally drops the cup-shaped body on the ground, while the bottle, together with its associated tamper-evident ring, is correctly disposed of in a trash can.

[0005] In order to overcome this drawback, a cap has been proposed which is provided with a retaining ring which can be associated with the neck of the bottle and a closure element which is connected to the retaining ring by a hinge. The closure element can be rotated about the hinge between an open position, in which the user can access the contents of the bottle, and a closed position, in which the user is prevented from accessing the contents of the bottle. The hinge keeps the closure element coupled to the retaining ring and therefore to the bottle, thereby preventing the possibility of the closure element being thrown to the ground independently of the bottle.

[0006] Yet, the lid of the prior art that is provided with hinge has the disadvantage that production is quite complicated.In fact, hinge is usually made in the same mould that obtains lid (particularly by injection moulding or compression moulding).

[0007] Therefore, special moulds are required for manufacturing lids with hinges of the prior art, which are different from those usually used for manufacturing lids without hinges. These moulds are more complicated than ordinary moulds, in particular, since lids with hinges of the prior art may be provided with undercuts, which require special devices in order to remove the lids from the moulds.

[0008] Furthermore, prior art lids with hinges may have areas of very small thickness which are difficult to obtain due to the difficulty of the molten polymeric material flowing into the parts of the mould intended to form these areas.

[0009] This increases the production costs of the lid with hinge and / or increases the production cycle required to obtain the lid with hinge. Summary of the invention

[0010] One object of the present invention is to improve the closures of the prior art, in particular closures comprising a retaining ring intended to remain associated with the neck of a container and a closure element removably engageable with the neck to allow the user to open or alternatively close the container.

[0011] Another object is to provide a cover for a container of the above-mentioned type which can be produced in a simple manner.

[0012] Another object is to provide a cap for a container having a closure element which is stay connected to a retaining ring, the production of which does not require a very complex mould.

[0013] According to the present invention, there is provided a cover for a container, the cover for the container comprising a side wall extending around an axis and a transverse wall arranged transversely to the axis, a separation line being provided on the side wall for defining:

[0014] a retaining ring intended to remain anchored to the neck of the container, and

[0015] a closure element removably engageable with the neck to open or close the container;

[0016] wherein the separation line extends around the axis and is interrupted in the circumferential direction to define a joining portion which joins the retaining ring and the closing element,

[0017] The cover also has a cut line extending in the side wall transversely to the axis so that the separation line is axially between the retaining ring and the cut line.

[0018] Two connection bands are defined between the separation line and the cut line to keep the closure element connected to the retaining ring.

[0019] The engaging portion allows the closure element to remain stably associated with the retaining ring and therefore with the neck of the container. This prevents the possibility of the closure element being thrown on the ground separated from the container. This increases the probability that the closure element is correctly disposed of together with the container and together with waste of the same type as the closure element, in particular waste made of plastic material.

[0020] The cover according to the invention can be manufactured in a relatively simple manner, without the use of a special mould. In fact, the cover according to the invention can be manufactured in a conventional mould if the cut line is made by a cutting operation. The cutting operation can obtain a cut line that passes through the entire thickness of the side wall, or a cut line that does not pass through the entire thickness (at which the thickness of the side wall is only partially cut).

[0021] Yet, also can consider to form the cut line by moulding inside the mould of making cover, but because the shape of cut line is particularly simple, therefore will not make mould overly complicated.In this case, cut line can also be shaped as weakening line.

[0022] The connecting strap together with the joining part defines an articulated arrangement whose movement capability in the axial direction is significantly greater than that permitted by the joining part alone.

[0023] In fact, the hinged arrangement allows the closure element to move away from the tamper-evident ring along a large axial distance defined by the combination of the length of the connecting band and the length of the joining portion. Thus, the closure element can be easily disengaged from the neck of the container and subsequently reapplied to the neck of the container.

[0024] In one embodiment, a plurality of breakable bridges are provided along the separation line, the plurality of breakable bridges being adapted to break when the closure element is brought to the open position for the first time.

[0025] In one embodiment, at least one breakable bridge of the plurality of breakable bridges is disposed in a position about the axis between one end of the incision line and the bonding portion.

[0026] Thereby, a good stability of the cap can be achieved during its application onto the neck, even in the case of a large angular extent of the incision line. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The invention may be better understood and implemented with reference to the accompanying drawings, which show exemplary and non-limiting embodiments of the invention, in which:

[0028] Figure 1 is a schematic rear view of a lid for a container in a closed position;

[0029] Figure 2 yes Figure 1 A perspective view of the cover in a configuration in which the closure element of the cover begins to move away from the retaining ring;

[0030] Figure 3 yes Figure 1 The cover is in Figure 2The cross section is taken along a plane where a centerline of a bonding portion lies, wherein the bonding portion bonds the closure element to the retaining ring;

[0031] Figure 4 is similar to Figure 1 Schematic rear view of a closure element about to be brought into the open position. DETAILED DESCRIPTION

[0032] Figures 1 to 4 A cap 1 for closing a container, in particular a bottle intended to contain a liquid substance such as a drink, is shown. The cap 1 is made of a polymeric material. Any polymeric material suitable for moulding can be used to obtain the cap 1.

[0033] Figure 1 1 shows a cap 1 in a closed position, in which the cap 1 is in a closed position when it leaves a cap production line and is ready to be applied to a container. In this case, the cap 1 comprises a side wall 2 extending around an axis Z and a transverse wall 3 arranged at one end of the side wall 2 to close the end. The transverse wall 3 extends transversely to (in particular, perpendicular to) the axis Z. The transverse wall 3 can be flat, even though other shapes are possible in theory. In the example shown, the transverse wall 3 has a generally circular shape in a plan view.

[0034] The cover 1 has a separation line 4 located on the side wall 2 and extending around the axis Z. The separation line 4 extends in a plane arranged transversely (specifically, perpendicularly) to the axis Z. The separation line 4 defines a retaining ring 5 and a closing element 6 on the cover 1. The retaining ring and the closing element are located on opposite sides of the separation line 4. As described in more detail below, when the cover 1 is moved to the open position, the closing element 6 is separated from the retaining ring 5 along the separation line 4.

[0035] The separation line 4 may be parallel to the free edge 16 of the cover 1 . More specifically, the free edge 16 delimits the retaining ring 5 on the side opposite to the transverse wall 3 .

[0036] The separation line 4 does not extend over the entire angle of 360° around the axis Z. The separation line 4 is interrupted in the circumferential direction so as to define a joining portion 8 on the side wall 2 , where the closing element 6 remains joined to the retaining ring 5 .

[0037] In other words, the separation line 4 has a first end 9 and a second end 10. The bonding portion 8 is interposed between the first end 9 and the second end 10. At the bonding portion 8, the retaining ring 5 is bonded to the closing element 6.

[0038] like Figure 2 As shown, the joining portion 8 has an angular dimension W around the axis Z.

[0039] The engaging portion 8 defines an articulation strip about which the closure element 6 can be rotated after being detached from the neck of the container to which the cap 1 is applied.

[0040] The articulated band extends between two opposite end regions of the joining portion 8 , that is, from a region of the joining portion 8 adjacent to the first end 9 to a region of the joining portion 8 adjacent to the second end 10 .

[0041] Thus, the articulation zone defined by the joining portion 8 affects the overall angular dimension W of the joining portion 8 in the case where the joining portion is not provided with an arrow-shaped hinge or an area of ​​reduced thickness.

[0042] Thus, with reference to any plane perpendicular to the axis Z (eg, a plane containing the separation line 4 ), the thickness of the bonding portion 8 may be substantially constant in that plane.

[0043] The bonding portion 8 may be defined by a smooth outer surface, in particular, an outer surface having the shape of a cylindrical portion.

[0044] A plurality of breakable bridges 71, 72, ... 7 are arranged along the separation line 4. n The plurality of breakable bridge members 71, 72, ... 7 n The retaining ring 5 is connected to the closing element 6. Breakable bridges 71, 72 ... 7 n It is intended to break when the closure element 6 is first brought into the open position to indicate that the container is no longer intact. Specifically, 71 represents the breakable bridge member closest to the first end 9 of the separation line 4, while 7 n The breakable bridge closest to the second end 10 of the separation line 4 is shown.

[0045] Breakable bridge members 71, 72...7 n They may be equally angularly spaced apart along the separation line 4 .

[0046] In the example shown, the closing element 6 has a cup-shaped body and comprises a skirt 11 extending around the axis Z. The skirt 11 is connected to the transverse wall 3, which is arranged at the end of the skirt 11 opposite the separation line 4. In particular, the skirt 11 is connected to the transverse wall 3 via a connecting area 12 which in cross section may be shaped like a beveled edge or a rounded edge.

[0047] like Figure 3 As shown, the skirt 11 is provided on its inner surface with removable fixing means by which the closure element 6 can be removably engaged with the neck of the container. The removable fixing means may comprise, for example, an internal thread 17 intended to engage with an external thread formed on the neck.

[0048] The skirt 11 may be provided on its outer surface with a plurality of knurled lines 13 extending parallel to the axis Z and adapted to assist the user in gripping the cap 1 , or in assisting the capping machine applying the cap 1 to the container to be closed.

[0049] The knurling line 13 can also continue in the connecting region 12 and / or in the retaining ring 5 .

[0050] The retaining ring 5 extends between the free edge 16 and the separation line 4. The retaining ring 5 can be defined by a cylindrical outer surface. Figure 1 In the closed position of the cap 1 shown, the retaining ring 5 is coaxial with the closure element 6 .

[0051] like Figure 3 As shown, the retaining ring 5 is provided with an engagement device on the inner side, which may include a plurality of engagement elements 20, which protrude inwardly from the retaining ring 5. The engagement element 20 may be formed as a thickened portion of the retaining ring 5, i.e., a portion of the retaining ring 5 whose thickness is greater than other regions of the retaining ring 5.

[0052] The engagement means are adapted to engage with a circular enlargement protruding from the outer surface of the neck. Specifically, when the cap 1 is applied to the neck for the first time, the engagement means are located below the circular enlargement, that is, on the side of the circular enlargement facing the container body. The engagement means are configured to abut against the circular enlargement, thereby preventing the retaining ring 5 from moving axially away from the neck when the closing element 6 is removed from the neck. Thus, the engagement means ensure that the retaining element 5 remains engaged with the neck of the container when the closing element 6 is brought to the open position.

[0053] In an alternative embodiment not shown, the engagement means may comprise a single annular element that is bent around the free edge 16 towards the inside of the retaining ring 5. In another alternative embodiment not shown, the engagement means may comprise a plurality of engagement elements that are shaped like tabs that protrude from the free edge 16 and are bent towards the inside of the retaining ring 5. Alternatively, the engagement means may comprise an enlargement and be continuous or discontinuous, which protrudes from the inner surface of the retaining ring 5 towards the axis Z to engage with the circular enlargement of the neck.

[0054] like Figures 1 to 4 As shown, the cover 1 has a cut line 21 extending transversely (particularly perpendicularly) to the axis Z on the side wall 2. The cut line 21 may be located in a plane arranged transversely (particularly perpendicularly) to the axis Z.

[0055] In more detail, a cut line 21 is provided in the closure element 6, which cut line may be in a position between the separation line 4 and the removable fixing means by which the closure element 6 may be removably fixed to the neck of the container.

[0056] Thus, the separation line 4 is axially interposed between the retaining ring 5 and the incision line 21. This means that if an observer moves parallel to the axis Z from the free edge 16 toward the side wall 3 in the region of the cap 1 where the separation line 4 and the incision line 21 are present simultaneously, he first encounters the retaining ring 5, then the separation line 4 and finally the incision line 21.

[0057] If the lid 1 is positioned in the same orientation as it has been applied to the container, i.e. with the transverse wall 3 facing upwards, the cut line 21 is arranged at a level above the separation line 4. The cut line 21 is therefore arranged on the same side relative to the separation line 4 as the closure element 6.

[0058] The coupling portion 8 and the retaining ring 5 are arranged on the same side of the cutout line 21. The cutout line 21 delimits the coupling portion 8 in a plane transverse to the axis Z on the side of the coupling portion 8 which is farthest from the retaining ring 5.

[0059] The cut line 21 has one end 27 and another end 28 , ie it extends between the one end 27 and the other end 28 .

[0060] The cut line 21 has an angular extent A1 measured around the axis Z, which is greater than the angular distance between the first end 9 and the second end 10 of the separation line 4 (i.e., the angular dimension W of the joining portion 8), also measured around the axis Z. The angular extent A1 of the cut line 21 can be defined as the angular distance between one end 28 and the other end 27 of the cut line 21 (i.e., the angle measured around the axis Z).

[0061] For example, the angular range A1 of the cut line 21 may be 150° to 200°, preferably greater than 180°. The angular dimension W of the joining portion 8 around the axis Z (i.e., the angular distance between the first end 9 and the second end 10 of the separation line 4) may be 5° to 40°, preferably 10° to 30°.

[0062] In the example shown, the joining portion 8 is centered relative to the separation line 21. In other words, the midpoint of the separation line 21 and the center line of the joining portion 8 are aligned with each other in a direction parallel to the axis Z, that is, the common plane in which the midpoint of the separation line and the center line of the joining portion lie contains the axis Z. However, this condition is not essential, since even an inexactly centered positioning of the cut line 21 relative to the joining portion 8 is permissible.

[0063] In the example shown, the incision line 21 has a flat curved shape. However, other shapes are also possible.

[0064] The incision line 21 and the separation line 4 may be located in respective parallel planes, but this condition is not necessary. For example, the incision line 21 and the separation line 4 may be located in planes slightly inclined relative to each other. Alternatively, the incision line 21 may include a plurality of stretches having different inclinations, which are not necessarily coplanar with each other.

[0065] The end 27 of the cut line 21 extends beyond the first end 9 of the separation line 4 outside the bonded portion 8 relative to the centerline plane of the bonded portion 8. The other end 28 is also outside the bonded portion 8 but extends beyond the second end 10 of the separation line 4 relative to the centerline plane of the bonded portion 8.

[0066] The cut line 21 includes an intermediate portion 24 between one peripheral portion 25 and another peripheral portion 26. The intermediate portion 24 faces the bonding portion 8. The peripheral portion 25 faces the separation line 4, specifically at the end portion of the separation line 4. More precisely, the peripheral portion 25 faces the separation line 4 in a region between the first end 9 of the separation line 4 and the end 27 of the cut line 21. The other peripheral portion 26 faces the separation line 4, specifically at the other end portion of the separation line 4. More precisely, the other peripheral portion 26 faces the separation line 4 in a region between the second end 10 of the separation line 4 and the other end 28 of the cut line 21.

[0067] A connection band 29 for keeping the closure element 6 connected to the retaining ring 5 is defined between the outer periphery 25 of the incision line 21 and the portion of the separation line 4 starting from the first end 9. Similarly, another connection band 30 for keeping the closure element 6 connected to the retaining ring 5 is defined between the other outer periphery 26 of the incision line 21 and the other portion of the separation line 4 starting from the second end 10.

[0068] In the example shown, the one connecting strip 29 and the other connecting strip 30 are arranged symmetrically to one another with respect to a plane containing the axis Z and containing the centre line of the joining part 8 .

[0069] The cut line 21 may be formed as a through cut through the entire thickness of the side wall 2 .

[0070] One or more further breakable bridges 18 are provided along the incision line 21, joining the edge of the incision line 21 closest to the retaining ring 5 to the edge of the incision line 21 furthest from the retaining ring 5. The further breakable bridges 18 are intended to break when the closure element 6 is brought into the open position for the first time.

[0071] In the example shown, two other breakable bridges 18 are arranged along the incision line. However, this condition is not necessary. For example, the number of other breakable bridges 18 can be equal to or greater than three.

[0072] In the example shown, one of the other breakable bridges 18 is arranged in a position around the axis between the first end 9 of the separation line 4 and the first breakable bridge 71 arranged along the separation line 4 (i.e., the breakable bridge closest to the first end 9 of the separation line 4).

[0073] The first breakable bridge 71 may be arranged at a small angular distance from the first end 9 of the separation line 4 , for example less than 10°, preferably less than 5°.

[0074] Furthermore, another of the other breakable bridges 18 is arranged in a position which is between the second end 10 of the separation line 4 and the last breakable bridge 7 arranged along the separation line 4 about the axis. n (ie between the breakable bridges of the separation line 4 closest to the second end 10).

[0075] Final breakable bridge 7 n It may be arranged at a small angular distance from the second end 10 of the separation line 4 , for example less than 10°, preferably less than 5°.

[0076] The further breakable bridges 18 along the cut line 21 are helpful when the cap 1 is first applied to the neck of a container by a capping machine, because they hold the mutually facing edges of the cut line 21 together, thereby preventing excessive deformation in the area of ​​the joining portion 8.

[0077] The breakable bridges 71, 72, ... 7 are arranged along the separation line 4. n It may be arranged in staggered positions about the axis Z relative to other breakable bridges 18 arranged along the incision line 21 .

[0078] A plurality of breakable bridges 71, 72, ... 7 are arranged along the separation line 4. n At least one breakable bridge 71 is interposed about the axis Z between the joining portion 8 (or more specifically, the first end 9 of the separation line 4 ) and the end 27 of the incision line 21 .

[0079] In the example shown, at least two breakable bridges 71, 72 arranged along the separation line 4 may be interposed about the axis Z between the joining portion 8 and the end 27 of the incision line 21. n The other breakable bridge in the can be axially aligned or nearly axially aligned with the end 27 of the incision line 21.

[0080] In addition, a plurality of breakable bridges 71, 72, . . . 7 are provided along the separation line 4. n At least one breakable bridge 7n The surrounding axis Z is interposed between the joining portion 8 (or more specifically, the second end 10 of the separation line 4 ) and the other end 28 of the incision line 21 .

[0081] In the example shown, at least two breakable bridges 7 are arranged along the separation line 4. n-1 , 7 n A plurality of breakable bridges 71, 72, ... 7 may be interposed between the joining portion 8 and the other end 28 of the cut line 21 around the axis Z. n Another breakable bridge member 7 n-2 It can be axially aligned or nearly axially aligned with the other end 28 of the incision line 21, such as Figure 3 shown.

[0082] Breakable bridge members 71, 72...7 n This distribution allows to avoid excessive deformation of the retaining ring 5, the connecting strip 29 and the further connecting strip 30, in particular when the cap 1 is applied to the neck for the first time by a capping machine. This is particularly useful when the angular extent A1 of the cut line 21 is large (e.g., close to 180° or more).

[0083] Cover 1 in Figure 1 The closed position shown is applied on the neck of a container. The cap 1 is positioned so that the engagement element 20 provided on the inside of the retaining ring 5 is located below the circular enlargement on the neck.

[0084] When the user wants to open the container for the first time, the user grasps the skirt 11 of the closure element 6 and rotates the closure element 6 around the axis Z in order to unscrew the closure element 6 from the neck. Initially, the closure element 6 and the retaining ring 5 rotate together around the axis Z, and they simultaneously move together away from the neck in a direction parallel to the axis Z. This situation continues until the engagement element 20 of the retaining ring 5 abuts against the circular enlargement provided on the neck. At this point, the circular enlargement of the neck acts as a stopper to prevent the retaining ring 5 from moving away from the neck and prevents the retaining ring 5 from rising further along the axis Z.

[0085] The closure element 6 which has been unscrewed by the user continues to move away from the neck along the axis Z. Breakable bridges 71, 72 ... 7 n and other breakable bridges 18 are thereby tightened, such as Figure 2 and Figure 3 shown.

[0086] Continue to unscrew the closure element 6, acting on the breakable bridges 71, 72 ... 7 n The tensile strain on the breakable bridges 71, 72, ... 7 n and other breakable bridge members 18 break, such as Figure 4 shown.

[0087] The closing element 6 is thus separated from the retaining ring 5 along the separation line 4 , but remains joined to the retaining ring 5 at the joining portion 8 .

[0088] The first connecting strip 29 and the second connecting strip 30 are thus separated from the adjacent region of the closure element 6 .

[0089] In addition, the first connection band 29 and the second connection band 30 are deformed. Specifically, by moving the closing element 6 upward, the first connection band 29 and the second connection band 30 are also pulled upward. Therefore, the first connection band 29 and the second connection band 30 are spaced apart from both the retaining ring 5 and the closing element 6 and remain combined with each other in the combined portion 8.

[0090] The first connecting belt 29 and the second connecting belt 30 are thus adopted as Figure 2 The shape of an inverted trapezoid is shown, and the neck of the container is not shown in this figure. In this configuration, the first connecting band 29 is kept bonded to the closure element 6 at one end 27 of the cut line 21. Similarly, the second connecting band 30 is kept bonded to the closure element 6 at the other end 28 of the cut line 21.

[0091] The first connection belt 29 and the second connection belt 30 are bonded to each other in the bonding portion 8 .

[0092] In other words, the first connection band 29 and the second connection band 30 are arranged in an inclined configuration relative to the retaining ring 5 and converge in the joining portion 8 .

[0093] Continue to unscrew the closure element 6, which disengages from the external thread formed on the neck, so that the container can be opened. On the contrary, the retaining ring 5 remains anchored to the neck. The first connecting band 29, the second connecting band 30 and the coupling portion 8 form an articulated arrangement around which the closure element 6 can be rotated to allow the user to access the contents of the container.

[0094] In particular, after the closure element 6 has been detached from the neck, the closure element 6 may be moved into a lateral position relative to the neck by moving the closure element 6 about the hinge arrangement such that the closure element 6 is no longer coaxial with the retaining ring 5 .

[0095] After use, the user can return the cover 1 to its original position by a series of operations in the reverse order of the operations described above. Figure 1 Shown in closed position.

[0096] The first and second connecting strips 29, 30 allow a longer articulated arrangement to be obtained than would be available if there were only an articulated strip defined by the joining portion 8. This makes it easier to detach the closure element 6 from the neck and to reapply the closure element 6 on the neck by rotating it about the articulated arrangement.

[0097] Breakable bridge members 71, 72...7 n The other breakable bridges 18 keep the cover 1 sufficiently rigid when it is first applied to a container, even in the case where the cut line 21 has a large angular extent A1.

Claims

1. A cover for a container, comprising a side wall (2) extending around an axis (Z) and a transverse wall (3) arranged transversely to the axis (Z), wherein a separation line (4) is provided on the side wall (2) for defining: a retaining ring (5) intended to remain anchored to the neck of the container, and a closure element (6) removably engageable with the neck to open or close the container; in, The separation line (4) extends around the axis (Z) and is interrupted in the circumferential direction to define a joining portion (8) joining the retaining ring (5) and the closing element (6), The cover (1) also has a cut line (21) extending in the side wall (2) transversely to the axis (Z) so that the separation line (4) is axially between the retaining ring (5) and the cut line (21), Two connecting strips (29, 30) are defined between the separation line (4) and the incision line (21) to keep the closing element (6) connected to the retaining ring (5), Wherein, the angular range (A1) of the incision line (21) around the axis (Z) is greater than 180°.

2. The cover according to claim 1, wherein A plurality of breakable bridges (71, 72, ..., 7 n ), the plurality of breakable bridge members (71, 72, ..., 7 n ) is adapted to break when the closure element (6) is brought to the open position for the first time.

3. The cover according to claim 2, wherein: At least one of the plurality of breakable bridges (71, 7 n ) is arranged in a position which is between one end (27, 28) of the incision line (21) and the bonding portion (8) about the axis (Z).

4. The cover according to claim 2, wherein: Two of the plurality of breakable bridges (71, 72; 7 n-1 , 7 n ) is arranged in a position between one end (27, 28) of the incision line (21) and the bonding portion (8) around the axis (Z).

5. The cover according to claim 2, wherein: The breakable bridge member (7 n-2 ) is substantially aligned with one end (27, 28) of the cut line (21) in the axial direction.

6. The cover according to claim 2, wherein: A plurality of other breakable bridges (18) are provided along the cut line (21), at least one of the plurality of other breakable bridges (18) being arranged in a position between the joining portion (8) and the plurality of breakable bridges (71, 72, ..., 7 n ) is a breakable bridge member (71, 7 n )between.

7. The cover according to claim 1, wherein The angular extent (A1) of the incision line (21) around the axis (Z) is less than 200°.

8. The cover according to claim 1, wherein The joining portion (8) has a substantially constant thickness in a plane perpendicular to the axis (Z).

9. The cover according to claim 1, wherein: One of the two connecting bands (29, 30) is defined between an outer peripheral portion (25) of the incision line (21) and an end portion of the separation line (4), and the other connecting band (30) of the two connecting bands (29, 30) is defined between the other outer peripheral portion (26) of the incision line (21) and the other end portion of the separation line (4).

10. The cover according to claim 9, wherein The one connecting belt (29) and the other connecting belt (30) are arranged symmetrically with respect to a plane containing the axis (Z) and a center line of the joining portion (8).

11. The cover according to claim 1, wherein The incision line (21) and the separation line (4) extend in respective parallel planes.

12. The cover according to claim 1, wherein The coupling portion (8) has an angular dimension (W) about the axis (Z) which is between 5° and 40°.

13. The cover according to claim 1, wherein The closure element (6) is provided with an internal thread (17) adapted to engage with the external thread of the neck.

14. The cover according to claim 12, wherein: The angular dimension (W) of the coupling portion (8) around the axis (Z) is between 10° and 30°.

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