An assembly including a container and a capping device attached to the container

Abstract

The invention relates to an assembly comprising: a container comprising a neck fitted with a tightening collar; and a closure device comprising a lower ring (9), a cap (1), an articulating device (10) connecting the cap (1) to the lower ring (9), and a locking device configured to lock the cap (1) in an inclined open position, the locking device comprising a strip (23) and a protrusion (24) protruding axially from the lower ring (9), the strip (23) and the protrusion (24) being configured such that the protrusion (24) is held between the strip (23) and the locking tightening collar when the cap (1) is in the inclined open position.

Description

[Technical field]

[0001] The present invention relates to an assembly including a container and a capping device, the capping device being provided with a cap and enabling said cap to remain attached to the neck of the container, thereby preventing the cap from being lost entirely. [Background technology]

[0002] In the state of the art, capping devices are known which allow to store a cap which is attached to the neck of a container. Such capping devices are described, for example, in EP 1 406 820 A1 or US 2018086510 A1.

[0003] The capping device comprises a lower ring adapted to be retained on the neck of the container, a cap adapted to cover and seal the orifice of the container, two elastomeric sheets connecting the cap to the lower ring, and a locking device positioned to lock the cap in a tilted open position.

[0004] Such a capping device is not fully satisfactory. In particular, the cap is intended to be hooked onto the neck of the container and cannot be adapted to other types of neck. Moreover, the movement of the cap between the closed position and the tilted open position is a simple pivoting movement which limits the height of the cap and / or neck that can be used. This limits the application of said capping device. In particular, such a capping device is not suitable for containers intended to receive carbonated beverages, since the pressure prevailing in this type of container leads to the undesired opening of the cap.

[0005] Furthermore, the locking device is not compatible with all types of caps and is not reliable enough to maintain the tilted open position of, for example, threaded caps. Summary of the Invention

[0006] The idea according to the invention is to provide an assembly comprising a container and a capping device comprising a cap attached to the neck of the container suitable for screwing onto the neck of the container, -Enables the cap to be securely locked in an inclined open position that does not prevent the discharge of the container contents; -Easy to manufacture, The object of the present invention is to provide an assembly.

[0007] According to one embodiment, the present invention comprises: a container with a neck, the neck comprising a dispensing orifice, a helical thread rotating about an axis X provided on the neck, and a tightening collar, A capping device, comprising: a lower ring axially mounted on the neck and rotatably movable on the neck about said axis X, the lower ring comprising a first section consisting of engagement elements projecting radially towards the inside of the lower ring and arranged below the tightening collar for axially retaining the lower ring on the neck of the container, and a second section, the first and second sections of the lower ring being hinged to one another such that the second section rotates relative to the first section between a lowered position, in which the second section is arranged below the tightening collar, and a raised position, in which the second section is arranged at least partially above the tightening collar; a cap including a top wall and a peripheral skirt, the peripheral skirt having a helical thread that cooperates with the helical thread of the neck to allow movement of the cap between a closed position and an open position in which the helical thread of the cap no longer engages with the helical thread of the neck; an articulation device consisting of two seats connecting the peripheral skirt and the second section and configured to allow the cap to pivot between a release position and an inclined open position in which the cap is released from the orifice in the neck, the articulation device being adapted for the second section of the lower ring to be located in a lowered position when the cap is in the inclined open position; a capping device comprising: Including, The capping device further comprises a locking device configured to lock the cap when the cap is in the tilted open position, the locking device comprising: a heel consisting of a strip projecting axially from the circumferential skirt between the two seats of the articulation device and projecting radially outward; a projection projecting axially from the second section of the lower ring between the two seats of the articulation device; Equipped with the strip and the protrusion are configured such that when the cap is in the tilted open position and the second section of the lower ring is in the lowered position, the protrusion is clamped between the strip and the clamping collar; Provide a kit.

[0008] Thanks to such a configuration, the locking device ensures a robust locking with large angles of the cap in the tilted open position. Moreover, with regard to a locking device consisting of a strip configured to abut the neck of the container, the proposed configuration makes it possible to limit the radial dimension of the strip, which is particularly advantageous insofar as a strip with too large a radial dimension could impair the reliability and performance of the bottling operation transported on a conveyor before the capping device is actuated on the container.

[0009] According to other advantageous embodiments, such an assembly may have one or more of the following characteristics:

[0010] According to one embodiment, the strip and the protrusion are configured to contact each other in an area where the strip and the protrusion are located in the plane of the tightening collar when the cap is in the tilted open position and the second section of the lower ring is in the lowered position.

[0011] According to one embodiment, e1>L-e2, where: L: Length of the sheet in the initial state with the cap in the closed position, e1: the radial distance between the contact area of ​​the strip intended to contact the protrusion when the cap is in the tilted open position and the intersection between a straight line passing through the upper end of the sheet and the plane of symmetry of the sheets relative to each other; and e2: the radial distance between the contact area of ​​the protrusion intended to be in contact with the strip when the cap is in the tilted open position and the intersection between a straight line passing through the lower end of the sheet and the plane of symmetry P, It is.

[0012] According to one embodiment, e1>L-e2+e3+e4, where: e3: radial clearance between the lower ring and the neck along a direction radial to the axis X and inscribed in the plane of symmetry P, and e4: radial clearance between the protrusion and the fastening collar, It is.

[0013] According to one embodiment, e1=L-e2+e3+e4+Δ, where Δ is comprised between 0.05 and 2 mm.

[0014] According to one embodiment, the projection projects beyond the lower limit of the circumferential skirt.

[0015] According to one embodiment, the first section of the lower ring comprises a front region diametrically opposite the second section and two engagement regions respectively arranged between the front region of the first section and the second section, the engagement elements being arranged only in the two regions in order to allow a radial movement of the lower ring which can facilitate the passage of a portion of the second section on both sides of the tightening collar while the second section moves between the lowered and the released positions. In this way, less tension is exerted on the lower ring to allow the second section to move between the lowered and the raised positions, which facilitates the use of the capping device.

[0016] According to one embodiment, the second section does not have an engagement element.

[0017] According to one embodiment, the front region of the first section is devoid of engagement elements.

[0018] According to one embodiment, the engagement elements are radially inwardly projecting protrusions.

[0019] According to one embodiment, the second section extends over an angular range of 90° to 180°.

[0020] According to one embodiment, the front region of the second section extends over an angular range of 40° to 150°.

[0021] According to one embodiment, each of the two engagement regions extends over an angular range of 10° to 90°.

[0022] According to one embodiment, the first section and the second section are separated from each other by two thinned regions in which the lower ring locally exhibits a reduction in radial thickness to enable the second section to articulate relative to the first section.

[0023] According to another embodiment, the lower ring has a thickness that is thin enough to allow rotation of the second section relative to the first section, such that the first section and the second section are not separated from each other by two thinned regions.

[0024] According to one embodiment, the peripheral skirt includes a cutout portion, and the elastic sheet is attached to the peripheral skirt at the cutout portion, such that a sufficient length of the elastic sheet can be provided while limiting the size of the gap formed between the cap and the lower ring that is likely to allow the passage of dust.

[0025] According to one embodiment, the lower ring is connected to the peripheral skirt by a frangible bridge.

[0026] According to one embodiment, the capping device is integrally molded.

[0027] According to one embodiment, the sheet and locking device are configured such that during pivoting movement of the cap between the release position and the tilted open position, the elastic sheet is subjected to a tension that increases to an intermediate unstable position and then decreases from said intermediate unstable position towards the tilted open position.

[0028] According to one embodiment, when the cap is in its tilted open position and the second section of the lower ring is in the lowered position, the opening angle of the cap is greater than 120°, preferably greater than 145°, for example around 180°. [Brief description of the drawings]

[0029] The invention will be better understood and other objects, details, features and advantages will become more apparent during the following description of various specific embodiments of the invention, given by way of example only and not by way of limitation, with reference to the accompanying drawings, in which:

[0030] [Figure 1] FIG. 2 is a rear three-quarter perspective view of the capping device attached to the neck of a container. [Diagram 2] 2 is a cross-sectional view of a container neck adapted to receive the capping device of FIG. 1. [Diagram 3] 2 is a side view of a capping device attached to the neck of a container, showing the cap of the capping device in a released position where it is no longer engaged with the neck of the container. [Figure 4] A detailed view of the engagement elements protruding radially inward from the bottom ring of the capping device. [Diagram 5] 1 is a perspective view of a capping device attached to the neck of a container, showing the cap of the capping device in a tilted open position in which the cap is released from the orifice of the neck. [Figure 6] 1 is a cross-sectional view of a capping device attached to the neck of a container, showing the cap of the capping device in a tilted open position in which the cap is released from the neck orifice. [Figure 7] FIG. 2 is an enlarged view of FIG. 1 showing the locking device in detail. [Figure 8]FIG. 2 is a schematic cross-sectional view of a cap and a strip. [Figure 9] 4 is a schematic cross-sectional view of the lower ring and the protrusion. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0031] In the description and figures, axis X corresponds to the axis of rotation of cap 1 of the closure device as it is screwed onto neck 2 of a container. By convention, a "radial" orientation is oriented perpendicular to axis X, and an axial orientation is oriented parallel to axis X. The terms "external" and "internal" are used to define the relative position of one element with respect to the other, e.g., with reference to axis X, such that elements closer to axis X are considered internal in contrast to external elements located at the radial periphery.

[0032] The terms "upper" and "lower" are used to define the relative position of one element with respect to the other in relation to the orientation in which the orifice 3 of the neck 2 is directed upwards and the cap 1 is in a closed position on the neck 2 of the container, with the element intended to be located lower being referred to as the lower side and the element intended to be located higher being referred to as the upper side. The terms "front" and "rear" are used to define the relative position of one element with respect to the other along a diameter perpendicular to the axis X.

[0033] With reference to Figures 1 to 6, an assembly comprising a capping device as shown in particular in Figure 1 and a container equipped with a neck 2 as shown in particular in Figure 2 will now be described.

[0034] As shown in Figure 2, the neck 2 of the container has an upper end in which an orifice 3 is formed through which the contents of the container can be poured. The neck 2 of the container includes a support collar 4 projecting radially outwardly and a fastening collar 5 which also projects radially outwardly and is located axially between the support collar 4 and the orifice 3. The neck 2 in turn includes a helical thread 6 located axially between the fastening collar 5 and the orifice 3, the helical thread 6 being formed by a series of helical ribs projecting radially outwardly from the outer surface of the neck 2. The helical thread 6 is adapted to cooperate with a complementary helical thread 7, shown in particular in Figure 5, formed by a series of helical ribs formed on the cap 1 of the capping device.

[0035] According to one embodiment, the helical thread 6 formed on the neck 2 as well as the helical thread 7 formed on the cap 1 are interrupted. In other words, adjacent helical ribs are separated by spaces forming vents and allowing gas within the container to escape, in particular while the cap 1 remains attached to the neck 2.

[0036] The capping device comprises a lower ring 9 to be held on the neck 2 of the container, a cap 1 adapted to cover an orifice 3 of the container to seal the container, and an articulation device 10 connecting the cap 1 to the lower ring 9. The cap 1 is movable between a closed position shown in Figure 1 and an open position shown in Figure 3 in which the cap 1 is no longer engaged with the neck 2. The cap 1 is also suitable for tilting from the open position towards a tilted open position represented in Figures 5 and 6 in which the cap 1 is removed from the orifice 3 of the neck 2 so as not to impede the pouring of the contents of the container. The capping device also comprises a locking device configured to lock the cap 1 in the tilted open position.

[0037] As shown particularly in Figure 1, cap 1 includes a top wall 13 adapted to be disposed substantially perpendicular to axis X, said top wall 13 facing the orifice 3 of neck 2 when said cap 1 is in the closed position. Cap 1 further includes a peripheral skirt 14 adapted to surround neck 2 of the container when cap 1 is in the closed position. Peripheral skirt 14 extends perpendicularly downwardly from the periphery of said top wall 13. Peripheral skirt 14 is provided with a helical thread 7 on its inner surface.

[0038] As shown in particular in Figures 5 and 6, the cap 1 also includes an internal skirt 8 that extends vertically downward from a top wall 13 of the cap 1 and is dimensioned to be inserted inside the orifice 3 of the neck 2. The cap 1 also includes an annular lip 15 that extends radially from the top wall 13 between the internal skirt 8 and a peripheral skirt 14. The internal skirt 8 and the annular lip 15 are dimensioned such that, when the cap 1 is in the closed position, within the neck 2 of the container, the internal skirt 8 contacts the inner surface of the neck 2 while the annular lip 15 contacts the outer surface of the neck 2. The internal skirt 8 and the annular lip 15 thus make it possible to ensure the tightness of the closure.

[0039] Preferably, the lower ring 9 is connected to the cap 1 before the first opening of the container by frangible bridges, not shown, which are intended to break during opening of the cap 1. These frangible bridges therefore constitute a tamper-evident seal.

[0040] The lower ring 9 is held axially on the container neck 2 insofar as it can rotate relative to the container neck 2 about axis X. As shown in Figures 1, 3 and 4, the lower ring 9 comprises two parts, a first section 16 and a second section 17, which are hinged to each other, by means of which the lower ring 9 is connected to the cap 1 by means of an articulation device 10. According to one embodiment, the lower ring 9 comprises two narrow regions, i.e. the radial thickness of said narrow regions is smaller than the radial thickness of the lower ring 9 outside said narrow regions. The two narrow regions define a first section 16 and a second section 17. The narrow regions thus form a pivot axis allowing the second section 17 to be articulated relative to the first section 16. According to another embodiment, the lower ring 9 does not have narrow regions defining the first section 16 and the second section 17.

[0041] As shown in FIG. 3, the second section 17 can be rotated upwards relative to the first section 16 between a lowered position in which the second section 17 is disposed below the tightening collar 5, and a raised position in which the second section 17 is disposed at least partially above the tightening collar 5. This allows the cap 1 to move upwards relative to the neck 2 of the container until the helical thread 7 of the cap 1 is disengaged from the helical thread 6 formed on the neck 2 of the container. In other words, when the cap 1 is unscrewed, the lower ring 9 is pulled in rotation about the axis X while the second section 17 of the lower ring 9 rotates to the raised position relative to the first section 16, allowing the axial movement of the cap 1 upwards, from the closed position to the open position shown in FIG. 3. When the cap 1 rotates from the open position towards the tilted open position, the second section 17 of the lower ring 9 returns to the lowered position after rotating in the opposite direction relative to the first section 16. Meanwhile, as the cap 1 rotates from the tilted open position to the open position, the second section 17 also rotates relative to the first section 16 from a lowered position to a raised position, as will be explained in more detail below.

[0042] The lower ring 9 is axially retained on the container neck 2 by a clamping collar 5. As shown in Figure 2, the clamping collar 5 has a frusto-conical outer surface that tapers upwardly, i.e., in the direction towards the container orifice 3. The clamping collar 5 defines a protrusion downwards, i.e., in the direction away from the orifice 3.

[0043] As shown in Figure 4, the first section 16 of the lower ring 9 includes an engagement element 18 that cooperates with a clamping collar 5 formed on the container to axially hold the lower ring 9 on the container neck 2. The engagement element 18 is a protrusion that projects radially inwardly from the first section 16 of the lower ring 9. The engagement element 18 has a radial dimension that increases from bottom to top, i.e., in the direction of the upper edge of the lower ring 9. During assembly of the capping device onto the container neck 2, the engagement element 18 slides against a frusto-conical surface of the clamping collar 5 and then is locked by a spring return behind the clamping collar 5.

[0044] The first section 16 of the lower ring 9 consists of a front area 19, which is diametrically opposite the second section 17 of the lower ring 9, and two engagement areas 20, one of which is shown in FIG. 4, which are arranged on either side of the front area 19, respectively between the front area 19 and the second section 17 of the lower ring 9. According to one embodiment, the engagement elements 18 are arranged only in the two engagement areas 20, 21. In this way, due to the absence of the engagement elements 18 in the front area of ​​the first section 16, there is a radial gap (hereinafter referred to as e4) between the lower ring 9 and the neck 2, which allows the lower ring 9 to move from the front to the rear and vice versa. The radial gap e4 between the lower ring 9 and the neck 2 depending on the front-rear direction is, for example, 0.5 mm to 1 mm. This facilitates the passage of a part of the second section 17 on both sides of the tightening collar 5 during the movement of the second section 17 between the lowered and raised positions. In other words, less tension is exerted on the lower ring 9 to allow the second section 17 to pass on each side of the clamping collar 5 .

[0045] In the embodiment shown, the articulation device 10 comprises two sheets 11, 12, which can be seen in particular in Figure 4, joining the cap 1, and more particularly the circumferential skirt 14 of the cap 1, with the lower ring 9, and more particularly the second section 17 of the lower ring 9. The sheets 11, 12 are symmetrical to each other with respect to a plane of symmetry P, represented in Figures 8 and 9, which is vertical and passes through the axis X.

[0046] 1, it can be seen that the seats 11, 12 are attached to the circumferential skirt 14 at the toothed portion. Similarly, the seats 11, 12 are preferably attached to the second section 17 of the lower ring 2 at the toothed portion. In other words, the seats 11, 12 extend approximately above the lower limit of the circumferential skirt 9 and approximately below the upper limit of the lower ring 3.

[0047] The locking device, as can be seen in particular in Figures 1, 5 and 6, comprises a heel 22 formed on the peripheral skirt 14 of the cap 1. The heel 22 projects axially downwards from the peripheral skirt 14 of the cap 1, i.e. in the direction of the lower ring 9. The heel 22 projects between the two seats 11, 12. The heel 22 consists of a strip 23 which extends circumferentially between the two seats 11, 12 and projects radially outward from the heel 22.

[0048] The locking device consists of a projection 24 which projects axially upwards from the second section 17 of the lower ring 9, i.e. towards the peripheral skirt 14 of the cap 1. The projection 24 also projects between the two seats 11,12.

[0049] 5 and 6, the strip 23 and the protrusion 24 are arranged such that, when the cap 1 is in the tilted open position, the protrusion 24 is interposed between the strip 23 and the clamping collar 5. In other words, when the cap is in the tilted open position, the strip 23 and the protrusion 24 contact each other in an area that is located in the plane of the clamping collar 5, and the protrusion 24 also contacts the clamping collar 5.

[0050] As shown in Figures 8 and 9, respectively, the contact area of ​​the strip 23 with the protrusion 24 is located at a radial distance e1 from the intersection between a line passing through the upper ends of the sheets 11, 12 and the plane of symmetry P, and the contact area of ​​the protrusion 24 with the strip 23 is located at a radial distance e2 from the intersection between a line passing through the lower ends of the sheets 11, 12 and the plane of symmetry P.

[0051] The dimension e1 is such that e1>L-e2, where L is the length of the sheets 11, 12 in the initial state when the cap is in the closed position, so that when the cap 1 is in the tilted open position, the strip 23 contacts the projection 24 and the sheets 11, 12 are under tension.

[0052] Furthermore, e1>L-e2+e3+e4, where e3: radial clearance between the protrusion 24 and the tightening collar 5, and e4: forward / reverse radial clearance between the lower ring 9 and the neck 2 along a direction radial to the axis X and inscribed in the symmetry plane P. Preferably, e1=L-e2+e3+e4+Δ, where Δ is 0.05-2 mm and is determined such that the protrusion 24 contacts the tightening collar 5 when the cap 1 is in the tilted open position.

[0053] On the other hand, as shown in Figure 7, when the cap 1 is in the tilted open position, the upper edge of the contact surface of the strip 23 extends a distance d1 axially below the upper ends of the seats 11, 12, the upper edge of the projection 24 extends a distance d2 axially above the lower ends of the seats 11, 12, and the upper edge of the tightening collar 5 extends a distance d3 axially above the lower ends of the seats 11, 12. Preferably, the distance d1 is less than d2 and d3.

[0054] The kinematics of the cap 1 are as follows: During the initial unscrewing, the cap 1 leaves the closed position and moves away from the lower ring 9 to the released position shown in FIG. 3. The frangible bridge breaks during this movement. Furthermore, during this unscrewing movement of the cap 1, the lower ring 9 is pulled in rotation about the axis X and the second section 17 of the lower ring 9 rotates towards the raised position as the cap 1 moves away from the clamping collar 5.

[0055] The cap 1 can then be rotated backwards in the direction of its tilted open position in which the circumferential skirt 14 extends upwards from the top wall 13. During the movement of the cap 1 backwards in the direction of its tilted open position, the strip 23 abuts the projection 24, thus causing the rotation of the second section 17 of the lower ring 9 which rotates from a raised position to a lowered position.

[0056] The possibility of stretching the sheets 11, 10 together with the aforementioned features of the blocking device make it possible to form a hard point during the tilting of the cap 1 between the released position represented in Figure 3 and the tilted open position represented in Figures 4 and 5. In other words, the sheets 11, 12 as well as the locking device are configured in such a way that during the first part of the movement of the cap 4 from the released position towards the tilted open position, the two elastic sheets 28, 29 are subjected, due to the support of the strips 23 on the projections 24, to a tension that increases up to an intermediate unstable position and then decreases from said intermediate unstable position towards the tilted open position. This allows the cap 1 to be locked in the tilted open position.

[0057] As shown in Figures 5 and 6, when the second section 17 of the lower ring 9 is in the lowered position and the cap 1 is in its tilted open position, the strip 23 thus abuts against the projection 24 which is inserted between said strip 23 and the tightening collar 5.

[0058] In this way, due to the aforementioned configuration, the cap 1 cannot rotate towards the open position where it faces the dispensing orifice 3, while the second section 17 of the lower ring 9 remains in the lowered position, so that the cap 1 remains in its tilted open position.

[0059] Preferably, when the cap 1 is in its tilted open position and the second section 17 of the lower ring 9 is in the lowered position, the opening angle of the cap 1 is greater than 120°, preferably greater than 145°, for example around 180°. The opening angle corresponds to a protruding angle section formed at the intersection between a plane parallel to the upper wall 13 of the cap 1 and a horizontal plane.

[0060] To reclose the cap 1, the user tilts the cap 1 forward to the release position. During this tilt, contact between the strip 23 and the projection 24 is lost, which allows the second section 17 of the lower ring 9 to move towards the raised position.

[0061] When the second section 17 is in the raised position and the cap 1 is in the released position, said cap 1 can be screwed back onto the neck 2 of the container. During screwing, the lower ring 9 is driven in rotation about the X-axis and the second section 17 of the lower ring 9 rotates towards the lowered position as the cap 1 approaches the clamping collar 5.

[0062] Preferably, the closure assembly is molded in a single piece made from a synthetic material such as polyethylene, and preferably high density polyethylene. Preferably, the closure is molded in the configuration of Figure 1, i.e. in the closed position, in which position it can be fitted directly onto the neck 2 of the container.

[0063] Although the present invention has been described in relation to some specific embodiments, it is by no means limited to these embodiments, but it is absolutely clear that the invention includes all technical equivalents of the described means, as well as combinations thereof, provided that they are within the scope of the invention as defined by the claims.

[0064] Use of the verbs "comprising", "comprise" or "include" and their conjugations does not exclude the presence of elements or steps other than those established in a claim.

[0065] In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim.

Claims

1. a container fitted with a neck (2) comprising a dispensing orifice (3), a helical thread (6) on said neck (2) rotating about an axis X, and a tightening collar (5), - a capping device, The capping device comprises: a lower ring (9) axially mounted on the neck (2) and rotatably movable on the neck (2) about the axis X, the lower ring (9) comprising a first section (16) consisting of engagement elements (18) projecting radially towards the inside of the lower ring (9) and arranged below the fastening collar (5) in order to hold the lower ring (9) axially on the neck (2) of the container, and a second section (17), the first section (16) and the second section (17) of the lower ring (9) being articulated to one another such that the second section (17) rotates relative to the first section (16) between a lowered position in which the second section (17) is arranged below the fastening collar (5) and a raised position in which the second section (17) is arranged at least partially above the fastening collar (5); a cap (1) comprising a top wall (13) and a peripheral skirt (14), said peripheral skirt (14) having a helical thread (7) which cooperates with said helical thread (6) of said neck (2) to allow movement of said cap (1) between a closed position and an open position in which said helical thread (7) of said cap (1) is no longer engaged with said helical thread (6) of said neck (2); an articulation device (10) consisting of two seats (11, 12) connecting said circumferential skirt (14) and said second section (17) and configured to allow said cap (1) to rotate between said release position and an inclined open position in which said cap (1) is released from said orifice (3) of said neck (2), said articulation device (10) being adapted to be located in said lowered position when said cap (1) is in said inclined open position; Including, The capping device further comprises a locking device configured to lock the cap (1) in the tilted open position, the locking device comprising: a heel (22) consisting of a strip (23) projecting axially from the peripheral skirt (14) between the two seats (11, 12) of the articulation device (10) and projecting radially outwards; a projection (24) projecting axially from the second section (17) of the lower ring (9) between the two seats (11, 12) of the articulation device (10); Equipped with the strip (23) and the projection (24) are configured such that the projection (24) is retained between the strip (23) and the clamping collar (5) when the cap (1) is in its tilted open position and the second section of the lower ring (9) is in the lowered position. assembly.

2. e1>L-e2, where L: the length of the seats (11, 12) in the initial state when the cap (1) is in the closed position, e1: the radial distance between the contact area of ​​the strip (23) intended to come into contact with the projection (24) when the cap (1) is in the inclined open position and the intersection between a straight line passing through the upper ends of the sheets (11, 12) and the plane of symmetry (P) of the sheets (11, 12) relative to one another; and e2: the radial distance between the contact area of ​​the projection (24) intended to come into contact with the strip (23) when the cap (1) is in the inclined open position and the intersection between a line passing through the bottom layer of the sheets (11, 12) and the plane of symmetry (P); 2. The assembly of claim 1 ,

3. e1>L-e2+e3+e4, where e3: radial clearance between the lower ring (9) and the neck (2) along a direction radial to the axis X and inscribed in the plane of symmetry (P); and e4: radial gap between the protrusion (24) and the fastening collar (5); 3. The assembly of claim 2 ,

4. 4. The assembly according to claim 3, wherein e1=L-e2+e3+e4+Δ, where Δ is comprised between 0.05 and 2 mm.

5. 5. An assembly according to any one of claims 1 to 4, wherein said projection (24) projects beyond the lower limit of said peripheral skirt (14).

6. 6. An assembly according to any one of claims 1 to 5, wherein the first section (16) of the lower ring (9) consists of a front area diametrically opposite the second section (17) and two clamping areas respectively located between the front area of ​​the first section (16) and the second section (17), and the engagement elements are located only in the two engagement areas in order to allow a suitable radial movement of the lower ring (9) to facilitate the passage of a portion of the second section (17) on either side of the clamping collar (5) during the movement of the second section (17) between the lowered position and the released position.

7. 7. The assembly according to claim 1, wherein the seats (11, 12) and the locking device are configured such that, during a pivoting movement of the cap (1) between the closed position and the tilted open position, the elastic seats (11, 12) are subjected to a tension that increases to an intermediate unstable position and then decreases from the intermediate unstable position towards the tilted open position.

8. 8. The assembly of claim 1, wherein the capping device is integrally molded.

9. 9. An assembly according to any one of the preceding claims, wherein the lower ring (9) is connected to the peripheral skirt (14) by a frangible bridge.

10. 9. An assembly according to any one of claims 1 to 8, wherein when the cap (1) is in its tilted open position and the second section (17) of the lower ring (9) is in the lowered position, the opening angle of the cap (1) is greater than 120°.

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