Closure device for fixing to the neck of a container

Abstract

Closure device for fixing to a neck (2) of a container, comprising a cap (1) having a helical thread (7) to cooperate with a helical thread (6) formed on said neck (2); a lower ring (9) axially fixed to said neck (2); a hinge device (10) connecting said cap (1) with a second section (17) of said lower ring (9) and extending in a first angular range bisected by a plane of bisection (Pb) into two equal parts; said helical thread (7) develops around an axis (X) in a first direction and has a lower end and an upper end. Said lower end is arranged in a second angular range defined between the plane of bisection (Pb) and a radial plane forming 160° with said plane of bisection (Pb) according to a second direction opposite to said first direction.

Description

Technical Field

[0001] The present invention relates to a component comprising a container and a capping device, the capping device being equipped with a cap and capable of holding the cap securely to the neck of the container, thereby preventing the cap from being completely lost. Background Technology

[0002] Document ES1232089U discloses a capping device comprising a lower ring, a cap, and a hinge. The lower ring is designed to be axially fixed to the neck of a container. The cap includes threads designed to engage complementary threads formed on the neck of the container. The hinge connects the cap to the lower ring. The lower ring includes an engagement device for retaining the lower ring on the neck of the container. A portion of the lower ring with the engagement device extends between 25% and 75% of the diameter of the lower ring. The portion of the lower ring connected to the cap via the hinge lacks the engagement device, which allows the portion to rotate between a lowered position and an raised position, particularly allowing the cap to be unscrewed. On the other hand, the cap includes a ratchet device for engaging with a complementary ratchet device formed in the lower ring, thus allowing the cap to be held in a tilted open position.

[0003] This sealing device is not entirely satisfactory. In fact, although there is no engaging mechanism in the portion connected to the lower ring of the cap via the hinge, when the cap is manipulated to allow the portion connected to the lower ring of the cap to rotate to the raised position, the cap should not easily move from the tilted open position to the closed position. Summary of the Invention

[0004] The basic concept of this invention is to provide a capping device that allows a cap to be held attached to the neck of a container, the cap being reliable, easy to manufacture, and easy to use.

[0005] According to one embodiment, the present invention provides a capping device for fixing a neck of a container, the neck including an opening and a connecting ring, the capping device comprising:

[0006] A cover comprising an upper wall and an outer peripheral skirt having a helical thread for engaging with a helical thread formed on the neck to allow:

[0007] The cover is screwed open about an axis onto the neck to a closed position where the opening of the neck is closed from the upper wall, and the outer peripheral skirt moves the cover about the neck toward a released position where the cover is no longer engaged with the neck; and

[0008] Screw the cap into the neck to move the cap from the released position to the closed position;

[0009] A lower ring, axially fixed to the neck and rotatably movable on the neck about the axis, the lower ring comprising a first segment having a plurality of engaging elements that project radially into the lower ring and are arranged below the engaging ring to axially hold the lower ring in the neck of the container, the first segment and a second segment of the lower ring being interconnected such that the second segment rotates relative to the first segment between a lowered position in which the second segment is arranged below the engaging ring and an elevated position in which the second segment is arranged at least partially above the engaging ring;

[0010] A hinge mechanism connects the cover to a second section of the lower ring and is configured to allow the cover to rotate between a released position and an inclined open position in which the cover disengages from the opening of the neck. The hinge mechanism extends within a first angular range, which is divided into two equal parts by a bisecting plane.

[0011] The lower ring is configured such that the second section rotates relative to the first section from the lowered position to the raised position, allowing the cover to move from the closed position to the released position;

[0012] During the movement of the second section between the lowered position and the released position, the lower ring can move radially from front to back so that a portion of the second section passes through each side of the engagement ring. The helical thread unfolds about the axis according to a first direction and has a lower end and an upper end. The lower end of the helical thread is arranged within a second angular range, which is defined between the bisecting plane and a radial plane that forms 160° with the bisecting plane according to a second direction opposite to the first direction.

[0013] When the cover moves from the tilted open position to the closed position, this facilitates engagement of the cover on the neck.

[0014] According to other helpful embodiments, this type of capping device may have one or more of the following features.

[0015] According to one embodiment, the lower end of the helical thread is arranged within an angle range defined between two radial planes, the two radial planes being rotated according to the second direction to form 90° and 160° with the bisecting plane (Pb), respectively.

[0016] According to one embodiment, the first segment of the lower ring includes a front region radially opposite to the second segment and two engagement regions, respectively arranged between the front region of the first segment and the second segment. The plurality of engagement elements are arranged only in the two engagement regions to allow radial movement of the lower ring. This reduces the pulling force applied to the lower ring to allow the second segment to move between the lowered and raised positions, which is beneficial for the use of the sealing device.

[0017] According to one embodiment, the front region of the first segment extends within an angular range between 90° and 150°.

[0018] According to one embodiment, each of the two joining regions extends within an angular range between 30° and 90°.

[0019] According to one embodiment, the two joining regions extend on a plurality of angular cross sections that are symmetrical to each other with respect to the bisecting plane (Pb).

[0020] According to one embodiment, the plurality of engaging elements are a plurality of radially inwardly projecting protrusions.

[0021] According to one embodiment, the second segment extends within an angular range of 90° and 150°.

[0022] According to one embodiment, the plurality of engaging elements are a plurality of radially inwardly projecting protrusions.

[0023] According to one embodiment, the second segment does not have the plurality of bonding elements.

[0024] According to one embodiment, the capping device further includes a locking device configured to lock the cap in the tilted open position. The locking device includes a stop projecting radially outward from the cap and is configured to abut against an engaging ring on the neck during movement of the cap from the tilted open position to the released position, applying a pulling force to the second section having a radially outward component and an axially upward component to facilitate movement of the second section between the lowered position and the raised position. This further facilitates the use of the capping device, particularly when the cap must be moved from the tilted open position towards the closed position.

[0025] According to one embodiment, the stop is configured to abut against the upper end of the second section of the lower ring during the movement of the cap from the release position to the tilted open position, thereby moving the second section from the raised position to the lowered position. This also makes the use of the capping device easier.

[0026] According to one embodiment, the locking device further includes a heel formed on the outer peripheral skirt of the cover and extending axially, the heel being configured to apply a pulling force to the second section against a helical rib of a helical thread formed on the neck of the container during the movement of the cover from the tilted open position to the release position, the pulling force having a radially outward component and an axially upward component to assist the second section in moving from the lowered position to the raised position.

[0027] According to one embodiment, the stop protrudes radially outward from the heel portion.

[0028] According to one embodiment, the hinge device includes two foils and the heel is formed between the two foils.

[0029] According to one embodiment, the hinge device includes two foils, and the capping device further includes means for locking the cap in the tilted open position. The locking means includes a stop formed in the outer peripheral skirt, between the two foils of the hinge, and configured to rest against the neck of the container when the cap is in the tilted open position. The heel portion has an inner side on which at least one rib with a helical thread is formed. This improves the pressure resistance of the capping device.

[0030] According to one embodiment, the present invention also relates to a component comprising a container equipped with a neck and the aforementioned capping device, the neck including a fitting hole, a connecting ring and a helical thread, the lower ring being axially fixed to the neck and rotatably movable on the neck about the axis. Attached Figure Description

[0031] In the following description of several specific embodiments of the invention, reference is made to the accompanying drawings, which are provided by way of illustration only and not limitation, to better understand the invention and to make other objects, details, features and advantages more apparent.

[0032] Figure 1 It is a three-quarter view of the sealing device.

[0033] Figure 2 It is used to receive Figure 1 A cross-sectional view of the neck of the container with the sealing device.

[0034] Figure 3 This is a side view of a capping device mounted on 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.

[0035] Figure 4This is a perspective view of a capping device mounted on the neck of a container, showing the cap of the capping device in an inclined open position, wherein the cap is unscrewed from an opening in the neck.

[0036] Figure 5 This is a side perspective view of the sealing device.

[0037] Figure 6 This is a three-dimensional view of the sealing device from another side.

[0038] Figure 7 This is a three-dimensional view of the rear of the sealing device.

[0039] Figure 8 This is a three-dimensional view of the front of the sealing device.

[0040] Figure 9 This is a cross-sectional view of a capping device mounted on the neck of a container, showing the cap of the capping device in the tilted open position, wherein the cap is unscrewed from an opening in the neck.

[0041] Figure 10 This is a cross-sectional view of a capping device mounted on the neck of a container, showing the cap of the capping device in an intermediate position between the released position and the tilted open position.

[0042] Figure 11 This is a perspective view of a capping device mounted on the neck of a container, showing the cap of the capping device in the tilted open position. Detailed Implementation

[0043] In the description and figures, axis X corresponds to the axis of rotation of the capping device 1 when it is screwed onto the neck 2 of the container. By convention, the "radial" direction is perpendicular to axis X, and the axial direction is parallel to axis X. The terms "outer" and "inner" are used to define the relative position of one element with respect to another element. By referring to axis X, elements closer to axis X are thus classified as inner elements, in contrast to outer elements which are radially located on the periphery.

[0044] The terms "upper" and "lower" are used to define the relative position of one element with respect to another element, with reference to the upward orientation of the orifice 3 of the neck 2, and the cover 1 in the closed position on the neck 2 of the container. The element placed in the lower position is designated "lower," and the element placed in the higher position is designated "upper." The terms "front" and "rear" are used to define the relative position of one element with respect to another element along a diameter perpendicular to axis X.

[0045] refer to Figures 1 to 10 The following describes a component, which includes, in particular, Figure 1 The sealing device indicated in the text, and especially in Figure 2 The text indicates that the container is equipped with a neck 2.

[0046] like Figure 2 As shown, the neck 2 of the container has an upper end with an opening 3 forming therein, allowing the contents of the container to be poured out. The neck 2 includes a support ring 4 and a connecting ring 5, the support ring 4 projecting radially outward, and the connecting ring 5 also projecting radially outward and axially arranged between the support ring 4 and the opening 3. A cylindrical portion is axially formed between the support ring 4 and the opening 3. On the other hand, the neck 2 includes a helical thread 6 axially positioned between the connecting ring 5 and the opening 3, the helical thread 6 being formed by a series of helical ribs projecting radially outward from the outer surface of the neck 2. The helical thread 6 is designed to mate with a complementary helical thread 7 formed by a series of helical ribs formed on the cap 1 of the sealing device.

[0047] According to one embodiment, the helical thread 6 formed on the neck 2 and the helical thread 7 formed on the cover 1 are blocked. In other words, adjacent helical ribs are separated by a space forming a vent, which in particular allows gas from the container to escape while the cover 1 is still attached to the neck 2.

[0048] The sealing device includes a lower ring 9, a cover 1, a hinge device 10, and a locking device. The lower ring 9 is held in the neck 2 of the container. The cover 1 is used to cover the opening 3 of the container to seal it. The hinge device 10 connects the cover 1 and the lower ring 9. The locking device is positioned to lock the cover 1 in an inclined open position. Figure 4 , Figure 9 and Figure 11 As shown. In the tilted open position, the cover 1 detaches from the opening 3 of the container without obstructing the pouring of the contents of the container.

[0049] like Figure 7 and Figure 8 As shown, the hinge device 10 extends over an angle range S1, which is divided into two equal parts by a perpendicular bisector plane Pb.

[0050] Return to Figure 1 As can be seen, the cover 1 includes an upper wall 13, which, when the cover 1 is in the closed position, is arranged approximately orthogonally to the axis X opposite to the opening 3 of the neck 2. The cover 1 also includes an outer peripheral skirt 14, which, when the cover 1 is in the closed position, surrounds the neck 2 of the container. The outer peripheral skirt 14 extends downward from the outer periphery of the upper wall 13 perpendicular to the upper wall 13.

[0051] The outer skirt 14 has a helical thread 7 on its inner surface. Figure 2 and Figures 5 to 7 As can be seen, the helical thread 7 is formed by a series of helical ribs extending in a first direction about the axis X. The helical thread 7 is used to engage with the helical thread 6 formed on the outer surface of the neck 2. In this way, the cap 1 can be screwed into the neck 2 to close the container, and can be screwed out of the neck 2 to open the container. The cap 1 can therefore move between a closed position and a released position, such as... Figure 3 As shown. In the released position, the cover 1 is no longer engaged with the neck 2. Therefore, the cover 1 can tilt toward the tilted open position, as... Figure 4 , Figure 9 and Figure 11 As shown, the cover 1 is disengaged from the opening 3 of the neck 2, so as not to hinder the pouring of the contents of the container.

[0052] Especially Figure 9 As shown, the cover 1 also includes an inner skirt 8 extending vertically downward from the upper wall 13 of the cover 1 and sized to insert into the opening 3 of the neck 2. The cover 1 also includes an annular lip 15 extending radially from the upper wall 13 between the inner skirt 8 and the outer peripheral skirt 14. The dimensions of the inner skirt 8 and the annular lip 15 are such that when the cover 1 is in the closed position, in the neck 2 of the container, the inner skirt 8 contacts the inner surface of the neck 2, while the annular lip 15 contacts the outer surface of the neck 2. Thus, the inner skirt 8 and the annular lip 15 ensure a tight seal.

[0053] Helpfully, before the container is first opened, the lower ring 9 is connected to the cover 1 via some fragile bridges not visible in the figure, which are designed to be broken during the opening of the cover 1. These fragile bridges thus constitute a tamper-proof seal.

[0054] The lower ring 9 is axially held on the neck 2 of the container, while the lower ring 9 can rotate relative to the neck 2 about the axis X. Figure 3 As shown, the lower ring 9 includes two sections hinged to each other, namely a first section 16 and a second section 17, thereby the lower ring 9 is connected to the cover 1 via the hinge device 10.

[0055] According to one embodiment, the lower ring 9 includes two narrowed regions, i.e., the radial thickness of which is less than the radial thickness of the lower ring 9 outside the narrowed regions. The two narrowed regions define the first segment 16 and the second segment 17. The narrowed regions thus form a pivot that allows the second segment 17 to hinge relative to the first segment 16.

[0056] According to another embodiment, the lower ring 9 does not have a narrowed region defining the first segment 16 and the second segment 17.

[0057] The second segment 17 is rotatable upward relative to the first segment 16, and is positioned between a lowered position and a raised position below the engaging ring 5, wherein the second segment 17 is at least partially positioned above the engaging ring 5. This allows the cap 1 to move upward relative to the neck 2 of the container until the helical thread 7 of the cap 1 disengages 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 rotatably driven about the axis X, while the second segment 17 of the lower ring 9 rotates relative to the first segment 16 to the raised position to allow axial movement, moving the cap 1 upward from the closed position to the released position, as... Figure 3 As shown. When the cover 1 rotates from the release position to the tilted open position, the second segment 17 of the lower ring 9 rotates in the opposite direction relative to the first segment 16, and then returns to the lowered position. On the other hand, as described in more detail below, when the cover 1 rotates from the tilted open position to the release position, the second segment 17 also rotates from the lowered position to the raised position relative to the first segment 16.

[0058] The lower ring 9 is axially held on the neck 2 of the container by the connecting ring 5, particularly in cases where Figures 5 to 7 As can be seen, the engaging ring 5 has an upwardly tapering truncated conical outer surface, i.e., towards the orifice 3 of the container. The engaging ring 5 defines a protrusion downwards, i.e., in the direction opposite to the orifice 3. The first section 16 of the lower ring 9 includes a plurality of engaging elements 18 that cooperate with the engaging ring 5 formed on the container to axially hold the lower ring 9 on the neck 2 of the container. The plurality of engaging elements 18 are protrusions, specifically as shown in... Figure 5 and Figure 6As shown, it protrudes radially inward from the first segment 16 of the lower ring 9. The radial dimensions of the plurality of engaging elements 18 increase from bottom to top, that is, in the direction of the upper edge of the lower ring 9. During the assembly of the capping device onto the neck 2 of the container, the plurality of engaging elements 18 slide against the truncated conical surface of the engaging ring 5 and are then locked by an elastic return mechanism behind the engaging ring 5.

[0059] like Figure 5 and Figure 6 As shown, the first segment 16 of the lower ring 9 includes a front region 19 and two engagement regions 20, 21. The front region 19 is radially opposite to the second segment 17 of the lower ring 9, and the two engagement regions 20, 21 are arranged on each side of the front region 19, and each is arranged between the front region 19 and the second segment 17 of the lower ring 9. The engagement element 18 is arranged only in the two engagement regions 20, 21. Therefore, since there is no engagement element 18 in the front region of the first segment 16, there is a radial space between the lower ring 9 and the neck 2 that allows the lower ring 9 to move from front to back and vice versa. The radial clearance between the lower ring 9 and the neck 2 in the front-to-back direction is, for example, 0.5 to 1 mm. This facilitates the passage of a portion of the second segment 17 across either side of the engagement ring 5 during movement of the second segment 17 between the lowered position and the raised position. In other words, a smaller tension should be applied to the lower ring 9 to allow the second segment 17 to be transmitted to each side of the engagement ring 5.

[0060] Helpfully, the second segment 17 extends in an angular range between 90° and 150°, for example, on the order of 120°, the front region of the second segment 16 extends in an angular range between 90° and 150°, for example, about 120°, and each of the two joining regions 20, 21 extends in an angular range including between 30° and 90°, for example, about 60°.

[0061] On the other hand, the bisecting plane Pb cuts the second segment 17 and its front portion into two equal parts. Therefore, the angular ranges corresponding to the two joining regions 20 and 21 are symmetrical about each other with respect to the bisecting plane Pb.

[0062] The hinge device 10 is configured to allow the cover 1 to, as Figure 3 The release position shown and as Figure 4 , Figure 9 and Figure 11The hinge rotates between the tilted open positions shown. In the released position, the outer peripheral skirt 14 extends downward from the upper wall 13 of the cover 1, and in the tilted open position, the outer peripheral skirt 14 extends upward from the upper wall 13 of the cover 1. In the illustrated embodiment, the hinge device 10 includes two foils 11, 12, particularly... Figure 4 As can be seen, they connect the cover 1, more specifically, the outer periphery 14 of the cover 1, to the lower ring 9, etc. Particularly the second segment 17 of the lower ring 9. The two foils 11 and 12 are symmetrical with respect to the bisecting plane Pb.

[0063] The locking device includes a heel portion 22, specifically, in Figure 1 As can be seen, it is formed on the outer peripheral skirt 14 of the cover 1. The heel 22 is arranged between the two foils 11, 12. The lower end of the heel 22 is advantageously located at the same height as the lower end of the outer peripheral skirt 14. The heel 22 includes a stop 23 that extends circumferentially around the axis X and protrudes radially outward from the heel 22.

[0064] During the movement of the cover 1 from the release position toward the tilted open position, the stop 23 abuts against the upper end of the second section 17 of the lower ring 9, which tends to return the second section 17 toward the lowered position.

[0065] On the other hand, during the process of the cover 1 moving from the inclined open position to the release position, firstly, the stop 23 rests against the engagement ring 5, such as... Figure 10 As shown, a tensile force having a radially outward component and an axially upward component is applied to the second section 17 of the lower ring 9. This allows the lower ring 9 to move from front to back to press the front region 19 of the first section 16 of the lower ring 9 against the neck 2 of the container, so as to facilitate the movement of the second section 17 toward the raised position. This also allows the second section 17 to move between the lowered position and the raised position.

[0066] Then, as Figure 10 As shown, during the process of the cover 1 moving from the tilted open position to the release position, the outer surface of the heel 22 reaches at a second moment against the upper surface of the helical rib of the helical thread 6 formed in the neck 2 of the container. This also allows a pulling force with radially outward and upward components to be applied to the second section 17 to move the second section 17 toward the raised position.

[0067] On the other hand, such as Figure 11As shown, the lower end 24 of the helical thread 7, i.e., the beginning of the helical thread 7, formed on the inner surface of the outer peripheral skirt 14 of s s1, is arranged within an angular range S2. This angular range S2 is defined by the bisecting plane Pb and a second direction radially opposite to the first direction, i.e., the direction of rotation of the helical thread 7 about the axis X. A radial plane Pr is located at a position forming 160° with the bisecting plane Pb. Therefore, the lower front portion 25 of the outer peripheral skirt 14 lacks the helical thread 7, making it easier for the cap 1 to be installed on the neck 2 of the container. This arrangement is particularly beneficial when the cap 1 is positioned slightly rearward when in contact with the neck 2 of the container. This is especially true when the front region 19 of the first section 16 lacks the plurality of engaging elements 18 and the lower ring 9 can move radially from front to back relative to the neck 2 of the container.

[0068] Helpfully, the lower end of the helical thread 7 is arranged within an angle range defined between two radial planes, which are rotated according to a second direction opposite to the direction of the helical thread 7 of the cover 1 and positioned at 90° and 160° respectively with the bisecting plane Pb.

[0069] On the other hand, such as Figure 8 , Figure 9 and Figure 10 Schematic representation: at least one rib of a series of ribs in the helical thread 7 is formed on the inner surface of the heel portion 22. In other words, at least one rib of the helical thread 7 is formed between the two foils 11, 12 of the hinge device 10. The presence of the rib formed on the heel portion 22 makes it possible to increase the pressure resistance of the helical thread 7, and thus prevents the cap 1 from accidentally opening due to excessive pressure on the container, especially when it is intended to receive carbonated beverages.

[0070] The movement of the cover 1 is as follows. Upon first unscrewing, the cover 1 moves away from the closed position and from the lower ring 9 to the released position, as shown below. Figure 3 As shown. The fragile bridge body breaks during this movement. Furthermore, during this unscrewing movement of the cover 1, the lower ring 9 is rotatably driven about the axis X, and as the cover 1 moves away from the engaging ring 5, the second segment 17 of the lower ring 9 rotates toward the raised position.

[0071] The cover 1 can then be rotated rearward in the direction of the inclined open position, where the outer peripheral skirt 14 extends upward from the upper wall 13. During the return movement of the cover 1 in the direction of its inclined open position, the stop 23 abuts against the upper end of the second section 17 of the lower ring 9, causing the second section 17 of the lower ring 9 to rotate from the raised position to the lowered position.

[0072] like Figure 9 As shown, when the second section 17 of the lower ring 9 is in the lowered position and the cover 1 is in the tilted open position, the stop 23 is supported on the engaging ring 5. Thus, the cover 1 is held in the tilted open position because, due to the stop 23 abutting against the engaging ring 5, the cover 1 cannot rotate toward the release position facing the orifice 3, while the second section 17 of the lower ring 9 remains in the lowered position. This allows for an increase in the minimum opening angle of the cover 1. Therefore, advantageously, when the cover 1 is in the tilted open position and the second section 17 of the lower ring 9 is in the lowered position, the opening angle of the cover 1 is greater than 120° and advantageously greater than or equal to 145°, for example, approximately 180°. The opening angle corresponds to the protruding angle section formed at the intersection of the plane parallel to the upper wall 13 of the cover 1 and the horizontal plane.

[0073] To close the cover 1 again, the user tilts the cover 1 forward to the release position. During tilting, the stop 23 rests against the engagement ring 5 to apply a pulling force with a radially outward component to the second segment 17 of the lower ring 9, allowing the lower ring 9 to move from front to back, and the axially upward component allows the second segment 17 of the lower ring 9 to move toward the raised position. The outer surface of the heel 22 also abuts the helical rib of the helical thread 6, which also facilitates the movement of the second segment 17 of the lower ring 9 toward the raised position.

[0074] When the second section 17 is in the raised position and the cap 1 is in the released position, the cap 1 can then be screwed back into the neck 2 of the container. During the screwing-in process, the lower ring 9 is rotatably driven about the axis X, and the second section 17 of the lower ring 9 rotates toward the lowered position as the cap 1 approaches the engaging ring 5.

[0075] Advantageously, the entire capping device is molded in a single piece of synthetic material, such as polyethylene, and advantageously high-density polyethylene. Advantageously, the capping device is molded into... Figure 1 The structure is such that it is in the closed position, in which it can be directly installed on the neck 2 of the container.

[0076] Although the invention has been described with respect to various specific embodiments, it is apparent that the invention is not limited in any way and includes all technical equivalents of the described apparatus, as well as combinations thereof, if falling within the framework of the invention as defined in the claims.

[0077] The use of the verbs “compose of,” “comprise,” or “include,” and their variant forms, does not preclude the presence of other elements or stages established in the claims.

[0078] In the claims, any reference symbols in parentheses should not be interpreted as limiting the claims.

Claims

1. A capping device for securing a neck (2) of a container, the neck (2) comprising an opening (3) and a connecting ring (4), characterized in that: The sealing device includes: A cover (1) includes an upper wall (13) and an outer peripheral skirt (14) having a helical thread (7) for engaging with a helical thread (6) formed on the neck (2) to allow: The cover (1) is rotated about an axis (X) on the neck (2) to a closed position where the opening (3) of the neck (2) is closed from the upper wall (13) and the outer peripheral skirt (14) is moved about the neck (2) toward a released position where the cover (1) is no longer engaged with the neck (2); and Screw the cover (1) into the neck (2) to move the cover (1) from the released position to the closed position; A lower ring (9) is axially fixed to the neck (2) and rotatably movable about the axis (X) on the neck (2). The lower ring (9) includes a first section (16) having a plurality of engaging elements (18) that project radially into the lower ring (9) and are arranged below the engaging ring (4) to axially hold the lower ring (9) in the neck (2) of the container. The first section (16) and a second section (17) of the lower ring (9) are connected to each other 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 engaging ring (4) and an elevated position in which the second section (17) is arranged at least partially above the engaging ring (4). A hinge device connects the cover (1) to a second section (17) of the lower ring (9) and is configured to allow the cover (1) to rotate between a released position and an inclined open position in which the cover (1) disengages from the opening (3) of the neck (2), the hinge device extending within a first angular range, the first angular range being divided into two equal parts by a bisecting plane (Pb); The lower ring (9) is configured such that the second section (17) rotates relative to the first section (16) from the lowered position to the raised position, so as to allow the cover (1) to move from the closed position to the released position; The helical thread (7) unfolds around the axis (X) according to a first direction and has a lower end and an upper end. The lower end of the helical thread (7) is arranged within a second angle range, which is defined between the bisecting plane (Pb) and a radial plane that forms 160° with the bisecting plane (Pb) according to a second direction opposite to the first direction.

2. The capping device as described in claim 1, characterized in that: The lower end of the helical thread (7) is arranged within an angle range defined between two radial planes, which are rotated according to the second direction to form 90° and 160° with the bisecting plane (Pb), respectively.

3. The sealing device as described in claim 1 or 2, characterized in that: The first section (16) of the lower ring (9) includes a front region (19) radially opposite to the second section (17) and two engagement regions (20, 21), the two engagement regions (20, 21) being arranged between the front region (19) of the first section (16) and the second section (17), respectively, and the plurality of engagement elements (18) being arranged only in the two engagement regions (20, 21) to allow radial movement of the lower ring (9).

4. The capping device as described in claim 3, characterized in that: The front region (19) of the first segment (16) extends within an angular range between 90° and 150°.

5. The capping device as described in claim 3, characterized in that: Each of the two joining regions (20, 21) extends within an angle range of 30° and 90°.

6. The capping device as described in claim 5, characterized in that: The two joining regions (20, 21) extend on multiple angular sections that are symmetrical to each other with respect to the bisecting plane (Pb).

7. The capping device as described in claim 6, characterized in that: The plurality of engaging elements (18) are a plurality of protrusions that project radially inward.

8. The capping device as described in claim 7, characterized in that: The second section (17) extends within an angular range of 90° and 150°.

9. The capping device as described in claim 8, characterized in that: The sealing device further includes a locking device configured to lock the cover (1) in the tilted open position. The locking device includes a stop (23) that projects radially outward from the cover (1) and is configured to abut against the engagement ring (5) of the neck (2) during the movement of the cover (1) from the tilted open position to the release position, applying a pulling force to the second section (17) having a radially outward component and an axially upward component to assist the second section (17) in moving between the lowered position and the raised position.

10. The capping device as claimed in claim 9, characterized in that: The stop (23) is configured such that during the movement of the cover (1) from the release position toward the tilted open position, the stop (23) abuts against the upper end of the second section (17) of the lower ring (9) to move the second section (17) from the raised position to the lowered position.

11. The capping device as claimed in claim 10, characterized in that: The locking device further includes a heel (22) formed on the outer peripheral skirt (14) of the cover (1) and extending axially, the heel (22) being configured to apply a pulling force to the second section (17) against a helical rib of a helical thread (6) formed on the neck (2) of the container during the movement of the cover (1) from the tilted open position to the release position, the pulling force having a radially outward component and an axially upward component to help the second section (17) move from the lowered position to the raised position.

12. An assembly comprising a container equipped with a neck (2) and a capping device as claimed in claim 11, the neck (2) comprising a fitting hole (3), a connecting ring (5) and a helical thread (6), the lower ring (9) being axially fixed to the neck (2) and rotatably movable about the axis (X) on the neck (2).

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