A container closure having a sealing surface and a support surface facing away from the sealing surface

Abstract

A container closure (10) includes a cap (16), a retaining ring (14) extending about a reference axis (100), and a hinge (18) connecting the retaining ring (14) to the cap (16). The cap (16) includes a top wall (27) and an inner sealing skirt (42) having a circumferential outer sealing surface (44) facing away from the reference axis (100). The circumferential outer sealing surface (44) tightly abuts against a circumferential inner sealing seat (48) of a pour wall (20) facing the reference axis (100) when the container closure (10) is in a closed position. The sealing skirt (42) has a circumferential support surface (50) facing the reference axis (100). The circumferential support surface (50) is further from an inner surface (29) of the top wall (27) than the outer sealing surface (44), and in the closed position, the circumferential support surface abuts against a circumferential opposing surface (52) of the retaining ring (14) facing away from the reference axis (100).

Description

Technical Field

[0001] The present invention relates to a container closure having a lid, a retaining ring extending about a reference axis of the container closure, and a hinge connecting the retaining ring to the lid. Background Technology

[0002] WO 2007 / 006957A1 discloses an oil bottle closure comprising a cap, a base extending around a reference axis of the container neck, and a hinge connecting the base to the cap. The base has a pouring wall surrounding the opening of the container closure. The cap includes a top wall and an inner sealing skirt extending from the inner surface of the top wall and having a circumferential sealing surface facing away from the reference axis. In the closed position of the container closure, this circumferential sealing surface abuts against a circumferential inner sealing seat of the pouring wall facing the reference axis. The base has a removable inner sealing disc that prevents contact with the container contents before first use, thereby protecting the contents. The inner sealing disc is connected to the pouring wall via a thin outer peripheral membrane that forms a tear line for the seal. After the first opening, the sealing disc becomes waste and must be disposed of separately from the container closure. Furthermore, after the first opening, the seal between the sealing surface and the sealing seat may be insufficient to withstand potential impacts, such as the impact of the container being dropped to the ground.

[0003] In EP 1901967B1, it has been proposed to improve the tightness of the seal by forming a groove in the sealing seat, wherein the sealing surface is formed on the end flange of the sealing skirt, which extends into the groove. However, once the engagement force is overcome, opening the closure becomes more difficult and less smooth. Summary of the Invention

[0004] The problem to be solved by the present invention is to provide a device for equipping the above-mentioned type of container closure with a device that does not require separation of the sealing disc from the closure, while still ensuring sufficient sealing before and after the first opening, and enabling smooth opening.

[0005] In a container closure, the closure includes a lid, a retaining ring extending about a reference axis of the closure, and a hinge connecting the retaining ring to the lid. The retaining ring has a pouring wall surrounding the opening of the closure. The lid includes a top wall and an inner sealing skirt. The inner sealing skirt extends from the inner surface of the top wall and has a circumferential sealing surface facing away from the reference axis. In the closed position of the closure, the circumferential sealing surface abuts against a circumferential inner sealing seat of the pouring wall facing the reference axis. According to a first aspect of the invention, the aforementioned problem is solved by the sealing skirt having a circumferential support surface facing the reference axis, the circumferential support surface being further away from the inner surface of the top wall than the sealing surface, and abutting against the circumferential opposing surface of the retaining ring facing away from the reference axis in the closed position. More specifically, when viewed in any axial section plane containing the reference axis and passing through the support surface, the outer sealing surface is axially located between the intersection of the support surface and the sealing skirt and the top wall.

[0006] The contact between the supporting surface and the opposing surface restricts the inward elastic deformation of the sealing skirt (caused by the contact between the sealing surface and the sealing seat), thus ensuring controllable pressure on the sealing seat. This allows for a complete seal of the container closure without the need for a sealing disc.

[0007] Since the opposing surfaces are part of the retaining ring and connected to the tilting wall, the distance between them should be kept small to limit the amount of material used for the connection. In a preferred embodiment, the support surface is formed on the end edge of the sealing skirt opposite to the base.

[0008] Preferably, the opposing surface of the retaining ring is an inclined plane facing the top wall. The force required to close the container closure gradually increases until the closed position is reached.

[0009] To prevent the contents of the container from accumulating between the opposing surface and the pouring wall, the retaining ring preferably has one or more reflux openings or notches.

[0010] To guide the liquid back into the container under gravity, the retaining ring may have a channel between the opposing surface and the pouring wall. This channel is preferably located in a support plane inclined relative to a reference axis, which preferably extends parallel to the hinge pivot. In one embodiment, the points on the channel are farther from the hinge the closer they are to the top wall. The support surface is preferably located on a support plane inclined relative to the reference axis and extending parallel to the return plane. The sealing seat is preferably located on a sealing plane inclined relative to the reference axis and extending parallel to the return plane.

[0011] In a preferred embodiment, an opposing surface is formed on the inner flow restrictor of the retaining ring, which can be connected to the tilting wall via a web. The flow restrictor may include a flow restricting wall with openings and possibly vents.

[0012] In one embodiment, the sealing skirt has a sealing flange on which at least a portion of the sealing surface is formed, and which projects radially in a direction opposite to the reference axis. The inner sealing skirt may have an additional sealing flange that projects radially in a direction opposite to the reference axis, and an additional portion of the outer sealing surface is formed on this additional sealing flange. The additional sealing flange may be located between the sealing flange and the top wall. In the closed position of the container closure, the additional sealing flange abuts against the circumferential inner sealing seat of the pouring wall in a sealing manner. The additional sealing flange provides a more reliable seal.

[0013] Alternatively or additionally, the cover may be provided with an outer sealing flange that projects from the inner surface of the top wall and has a circumferential inner sealing surface facing a reference axis, such that in the closed position of the container closure, this circumferential inner sealing surface abuts against the circumferential outer sealing seat of the pouring wall in a sealing manner. Adding an outer sealing flange provides a more reliable seal and provides additional resistance to lateral impacts. Where appropriate, the sealing seat is conical or cylindrical. Alternatively, it is conceivable that the sealing seat is formed by a groove in the pouring wall.

[0014] In a preferred embodiment, the hinge is a snap-on hinge.

[0015] In a preferred embodiment, the container closure is made of a single plastic component.

[0016] According to one embodiment, the retaining ring includes an outer peripheral wall that projects axially in a direction opposite to the pouring wall, and preferably has one or more fastening protrusions for securing the retaining ring to the container neck. The fastening protrusions may be resilient hooks distributed circumferentially around the retaining ring to engage behind a circumferential retaining flange on the container neck when installed. Other fastening protrusions are also contemplated, such as circumferential retaining flanges and / or threads.

[0017] The retaining ring may have an inner skirt that protrudes axially in the direction of the pouring wall from the inner side of the outer peripheral wall of the retaining ring, so as to form a static seal between the retaining ring and the neck of the container and may also have a centering function.

[0018] In one embodiment, the retaining ring has a middle wall, from which both the inner skirt and the outer peripheral wall of the retaining ring protrude.

[0019] In one embodiment, the cover is provided with one or more destructible tamper-evident indicators that extend through a recess formed in the retaining ring at the closed position of the container closure and are held by one or more locking surfaces formed in the retaining ring. Specifically, the one or more recesses and the one or more locking surfaces may be formed on the intermediate wall.

[0020] According to a second aspect of the invention (which may be combined with the aforementioned first aspect), a container closure is provided, the container closure comprising a cap, a retaining ring extending about a reference axis of the container closure, and a hinge connecting the retaining ring to the cap, the retaining ring having a pouring wall surrounding an opening of the container closure, the cap comprising a top wall and an inner sealing skirt, the inner sealing skirt extending from an inner surface of the top wall and having a circumferential sealing surface facing away from the reference axis, wherein in a closed position of the container closure, the circumferential sealing surface abuts in a sealing manner against a circumferential inner sealing seat of the pouring wall facing the reference axis. To achieve a better seal, the inner sealing skirt has a sealing flange and an additional sealing flange that project radially in a direction opposite to the reference axis, and at least a portion of the outer sealing surface is formed on the sealing flange. The additional sealing flange also projects radially in a direction opposite to the reference axis, and an additional portion of the outer sealing surface is formed on the additional sealing flange. The additional sealing flange is located between the sealing flange and the top wall, and in the closed position of the container closure, the additional sealing flange abuts against the circumferential inner sealing seat of the pouring wall in a sealing manner.

[0021] The sealing flange and the additional sealing flange preferably extend parallel to each other, and the axial distance between them, measured at their respective radial tip portions, is preferably less than 2 mm.

[0022] To better control the contact pressure between the sealing flange and the inner sealing seat, the sealing skirt preferably has a circumferential support surface facing the reference axis. This circumferential support surface is further away from the inner surface of the top wall than the outer sealing surface, and in the closed position abuts against the circumferentially opposing surface of the retaining ring away from the reference axis. Alternatively or additionally, the sealing skirt may have a circumferential support surface facing the reference axis, which is axially located between the outer sealing surface and the top wall, and in the closed position, this circumferential support surface abuts against the circumferentially opposing surface of the retaining ring away from the reference axis.

[0023] According to another aspect of the invention (which may be combined with the foregoing first or second aspect), a container closure is provided, the container closure comprising a cap, a retaining ring extending about a reference axis of the container closure, and a hinge connecting the retaining ring to the cap, the retaining ring having a pouring wall surrounding an opening of the container closure, the cap comprising a top wall and an inner sealing skirt, the inner sealing skirt extending from an inner surface of the top wall and having a circumferential sealing surface facing away from the reference axis, wherein, in a closed position of the container closure, the circumferential sealing surface abuts in a sealing manner against a circumferential inner sealing seat of the pouring wall facing the reference axis. The retaining ring has an outer peripheral wall surrounding the pouring wall and an intermediate wall extending radially between the outer peripheral wall and the pouring wall. To strengthen the structure of the hinge region of the container closure, particularly to withstand impacts applied to the hinge region in the closed position, the retaining ring includes a reinforcing web extending within a reference plane of the container closure. This reference plane includes the reference axis and is perpendicular to the hinge pivot. The reinforcing web connects the outer peripheral wall to the intermediate wall and the tipping wall, and the reinforcing web intersects the intermediate wall with a line extending radially from the outer peripheral wall to the tipping wall. To further enhance the resistance to deformation in the hinge region, the reinforcing web intersects the outer peripheral wall, preferably extending from the intermediate wall to the hinge.

[0024] In one embodiment, the reinforcing web has a top surface located within an injection plane that includes the hinge pivot and is perpendicular to a reference axis of the container closure. This top surface can provide an injection point if the container closure is integrally molded in the open position. Attached Figure Description

[0025] Embodiments of the present invention will now be described with reference to the accompanying drawings, in which: Figure 1 This is an isometric view of the container closure component after demolding in the open position (i.e., before the first closure) according to the first embodiment of the present invention. Figure 2 yes Figure 1 Another isometric view of the container closure shown in the open position before its initial closure; Figure 3 yes Figure 1 The side view of the container closure shown is in the open position before the first closure. Figure 4 yes Figure 1 The shown container closure is in the open position before the first closure; Figure 5 yes Figure 1 The top view of the container closure shown is in the open position before the first closure. Figure 6 yes Figure 1 The container closure shown is in the closed position before the first opening. Figure 7 The sectional side view of the cutting plane VI-VI shown; Figure 7 It is fixed to the neck of the container. Figure 1 The container closure shown is in the closed position before the first opening. Figure 6 The top view of the section plane VII-VII shown; Figure 8 It is fixed to the neck of the container. Figure 1 The container closure shown is in the closed position before the first opening. Figure 7 The main sectional view shown is the section view along cutting plane VIII-VIII; Figure 9 It is fixed to the neck of the container. Figure 1 The container closure shown is in the closed position before the first opening. Figure 7 The sectional side view of the cutting plane IX-IX shown; Figure 10 yes Figure 1 The isometric view of the container closure shown in the closed position before the first opening; Figure 11 yes Figure 1 The isometric view of the container closure shown in the closed position after the first opening; Figure 12 This is a side view of another embodiment of the container closure in the open position before the first closure; Figure 13 yes Figure 12 The diagram shows a cross-sectional view of the container closure in the open position before its initial closure. Figure 14 yes Figure 12 The top view of the container closure in the open position before the first closure is shown; Figure 15 yes Figure 12 The shown is a cross-sectional side view of the container closure in the closed position before the first opening. Figure 16 yes Figure 15 Detailed view of area A within the middle circle; Figure 17 yes Figure 12 The side view of the container closure in the open position after initial opening; Figure 18 yes Figure 12 The cross-sectional side view of the container closure in the open position after initial opening is shown; and Figure 19 yes Figure 12The container closure shown is in the closed position after the container is first opened.

[0026] In the various figures and different embodiments, the same or corresponding reference numerals refer to the same or corresponding parts. Detailed Implementation

[0027] refer to Figures 1 to 11 The container closure 10 will be installed on the neck CN of the container (see...). Figure 8 and Figure 9 The container closure 10 can be made of plastic or other materials compatible with the contents of the container. Polymers, particularly thermoplastic materials (e.g., polyethylene or polypropylene), are preferred herein.

[0028] The container closure 10 includes a retaining ring 14, a lid 16, and a hinge 18 connecting the retaining ring 14 to the lid 16. The hinge 18 is shown herein as a snap-fit ​​hinge and allows the lid 16 to rotate around a point perpendicular to... Figure 3 The cross-section pivots 180 degrees.

[0029] exist Figures 1 to 5 The opening position is preferably integrally formed of the retaining ring 14, the cover 16 and the hinge 18, so this opening position can be called the forming position.

[0030] The retaining ring 14 surrounds a reference axis 100 of the container closure 10 and has a tipping wall 20, an outer peripheral wall 21, and an intermediate wall 23. The tipping wall 20 surrounds the retaining ring 14 and the opening 200 of the container closure 10; the outer peripheral wall 21 surrounds the tipping wall 20; and the intermediate wall 23 extends radially between the outer peripheral wall 21 and the tipping wall 20. The outer peripheral wall 21 is provided with protrusions 22 for securing the retaining ring 14 to the container neck CN. The securing protrusions may include a series of resilient hooks 22 distributed circumferentially along the retaining ring and engaging behind the circumferential retaining flange of the container neck when installed to the container neck. Other securing protrusions may also be considered, such as circumferential retaining flanges and / or threads.

[0031] The pouring wall 20 surrounds the inner peripheral wall 32 of the retaining ring 14, forming a channel 38 between the inner peripheral wall 32 and the pouring wall 20. A notch 33 on the inner peripheral wall 32 provides a return path for any liquid collected in the channel 38 to return to the opening 200 of the retaining ring 14. The channel 38 is preferably located within a return plane 300, which is inclined relative to the reference axis 100 and extends parallel to the pivot 180 of the hinge 18. This ensures that when the reference axis 100 of the container closure 10 is vertical, the liquid collected in the channel 38 returns to the opening 200 of the retaining ring 14 and back to the container under gravity.

[0032] The retaining ring 14 may be provided with a flow restrictor 34, which may include a plate or a set of tabs 34 that protrude radially (preferably axially) from the inner peripheral wall 32 and partially cover the opening 200. However, the opening 200 of the container closure remains open in the formed position, that is, the container closure 10 is not provided with any tearable disc or membrane to close the retaining ring 14 before the first opening.

[0033] In the region of hinge 18, a reinforcing web 24 connects the outer peripheral wall 21 to the intermediate wall 23 and / or to the tipping wall 20. More specifically, the reinforcing web 24 extends within a radial reference plane 240 of the container closure, which includes a reference axis 100 and is perpendicular to the pivot 180 of hinge 18. The line of intersection of the reinforcing web 24 and the intermediate wall 23 extends from the outer peripheral wall 21 to the tipping wall 20. The line of intersection of the reinforcing web 24 and the outer peripheral wall 21 preferably extends upward from the intermediate wall 23 to the central portion 25 of hinge 18. The web has a top surface 26, which is preferably flat and can advantageously serve as a point for injecting the constituent material of the container closure 10 into the mold during the production of the container closure by injection molding. The distance D between the intermediate wall 23, measured parallel to the reference axis 100, and the injection plane 400 containing the top surface 26 (see...) Figure 4 Preferably, it is greater than 5mm.

[0034] The cover 16 includes a top wall 27, a circumferential wall 28 surrounding an inner surface 29 of the top wall 27, and a gripping protrusion 30 extending radially outward from the circumferential wall 28 and optionally formed by a radial extension of the top wall 27, as shown. The top wall 27 may be flat or curved.

[0035] An annular inner sealing skirt 42 protrudes from the inner surface 29 of the top wall 27. The annular inner sealing skirt 42, spaced radially from and surrounded by the circumferential wall 28, has a radially outwardly facing outer sealing surface 44. The outer sealing surface 44 may be formed by one or preferably two radially outwardly projecting flanges 46, 47, and in the closed position forms a sealing contact with an inner sealing seat 48, which is formed by the tilting wall 20 and is radially inward. If two projecting flanges 46, 47 are provided, they are preferably axially spaced from each other, with a spacing preferably greater than 0.5 mm and less than 5 mm (measured tip-to-tip and preferably constant). Herein, each projecting flange 46, 47 lies within an inclined sealing plane substantially parallel to the return plane 300. The closer the point of the sealing surface 44 is to the top wall 27, the farther it is from the pivot 180 of the hinge 18. The protruding flange 46 is preferably located near the free edge 420 of the sealing skirt 42, which is also located in an inclined plane that is substantially parallel to the return plane 300.

[0036] The inner sealing skirt 42 has a circumferential support surface 50 that is radially inward and further away from the inner surface 29 of the top wall 27 than the outer sealing surface 44. In other words, viewed in any axial section including the reference axis 100 and intersecting the support surface 50, the outer sealing surface 44 is axially located between the support surface 50 and the line of intersection of the sealing skirt 42 and the top wall 27. The support surface 50 may, for example, be formed at the lower free edge 240 of the inner sealing skirt 42 for abutting against the axially opposing surface 52 of the retaining ring 14 away from the reference axis 100 in the closed position. The opposing surface 52 may be a slope facing the top wall 27. It is preferably formed by the inner circumferential wall 32. The support surface 50 lies on a support plane inclined to the reference axis, which is substantially parallel to the return plane 300.

[0037] The projection of the inner sealing skirt 42 onto a plane perpendicular to the reference axis 100 is circular, or at least substantially circular. The same applies to the inner peripheral walls 32 of the tilting wall 20 and the retaining ring 14. This means that each of the projecting flanges 46, 47, the inner sealing seat 48, the channel 38, and the opposing surface 52, all located on a plane parallel to the return plane 300, is elliptical or substantially elliptical.

[0038] When the cover 16 from Figures 1 to 5 Move the indicated opening position to... Figures 6 to 10 In the closed position shown, the inclined free edge 420 ensures that the inner skirt 42 moves along the closed path, thereby minimizing interference with the tilting wall 20. The lower free edge 420 of the sealing skirt 42 smoothly enters the annular space defined by the tilting wall 20 and the opposing surface 52. The tilting wall 20 contacts the flanges 46, 47 and pushes the flanges 46, 47 radially inward. The support surface 50 abuts against the inclined opposing surface 52, thereby limiting the elastic deformation of the sealing skirt and increasing the pressure on the sealing seat.

[0039] The container closure 10 has one or more tamper-evident indicators 56, which are connected to the cap 20 via a predetermined fracture region 58. Each tamper-evident indicator 56 has at least one locking protrusion 60, which, in the closed position before initial opening, is received in a recess 62 of the retaining ring 14 and engages behind the locking surface 64 of the retaining ring 14. See [link to relevant documentation]. Figure 8 and Figure 10 Upon initial activation, the tamper-proof indicator 56 remains locked in the recess 62, as... Figure 11 As shown.

[0040] The retaining ring 14 may be provided with an additional sealing skirt 66, which abuts against the inside of the upper edge of the container neck CN to provide an additional sealing interface and to center the retaining ring 14 on the container neck CN.

[0041] Second embodiment of the invention, for example Figures 12 to 19 As shown. In the first and second embodiments, the same reference numerals refer to the same or corresponding parts. Except as described below and Figures 12 to 19 Apart from the differences shown, the above description of the first embodiment also applies to the second embodiment.

[0042] The cover 16 includes an outer sealing flange 53 that surrounds the inner sealing skirt 42 and, in the closed position, seals against an outer sealing seat or sealing lip 54 formed by the pouring wall 20, which is radially outward and located on a plane 500 perpendicular to the reference axis 100. The outer sealing surface 44 is formed by a single radially outward-projecting flange, but multiple flanges may also be used. Notably, both embodiments provide a container closure 10 for liquids (e.g., edible oil) that does not require a tearable membrane or disc to close and seal the opening 200 of the retaining ring 14 before initial opening.

[0043] In addition, the flow restrictor 34 includes a flow-limiting wall 34, which may be conical and partially covers the opening 200. The flow-limiting wall 34 may be provided with ventilation holes to ensure pressure balance between the inside of the container and the environment when the contents of the container are poured out.

[0044] The inner peripheral wall 32 of the second embodiment differs from that of the first embodiment in that it is continuous, i.e., without gaps. The through-hole 133 in the channel 38 provides a return path for any liquid collected in the channel 38 to return to the opening 200 of the retaining ring 14.

[0045] The container closure 10 has a single arc-shaped tamper-evident indicator 56, which is connected to the cap 20 via a predetermined fracture region 58. The tamper-evident indicator 56 has a locking protrusion 60 that, when in the closed position before initial opening, is received within a recess 62 of the retaining ring 14 and engages behind the locking surface 64 of the retaining ring 14, see [link to relevant documentation]. Figure 15 Upon initial activation, the tamper-proof indicator 56 remains locked within the recess 62, see [link / reference]. Figure 18 .

[0046] In this embodiment, the additional sealing skirt 66 of the retaining ring 14 abuts against the inner side of the upper edge of the container neck CN.

Claims

1. A container closure (10), comprising: The container closure (10) comprises a cover (16), a retaining ring (14) extending around a reference axis (100) of the container closure (10), and a hinge (18) connecting the retaining ring (14) to the cover (16). The retaining ring has a pouring wall (20) around the opening (200) of the container closure (10). The cover (16) includes a top wall (27) and an inner sealing skirt (42), the inner sealing skirt (42) protruding from the inner surface (29) of the top wall (27) and having a circumferentially outer sealing surface (44) facing away from the reference axis (100). In the closed position of the closure (10), the circumferential outer sealing surface (44) abuts against the circumferential inner sealing seat (48) of the tilting wall (20) in a sealing manner, characterized in that the sealing skirt (42) has a circumferential support surface (50) facing the reference axis (100), the circumferential support surface (50) being further away from the inner surface (29) of the top wall (27) than the outer sealing surface (44), and in the closed position, the circumferential support surface (50) abuts against the circumferential opposing surface (52) of the retaining ring (14) facing away from the reference axis (100).

2. The container closure (10) according to claim 1, wherein, The support surface (50) is formed on the end edge of the sealing skirt (42) away from the base.

3. The container closure (10) according to any one of the preceding claims, wherein, The opposing surface (52) of the retaining ring (14) is inclined and faces the top wall (27).

4. The container closure (10) according to any one of the preceding claims, wherein, One or more reflux openings (40) are provided between the opposing surface (52) of the retaining ring (14) and the tilting wall (20).

5. The container closure (10) according to any one of the preceding claims, wherein, A channel (38) is provided between the opposing surface (52) of the retaining ring (14) and the tilting wall (20).

6. The container closure (10) according to claim 5, wherein, The channel (38) is located within the return plane (300), which is inclined to the reference axis and extends parallel to the pivot (180) of the hinge (18).

7. The container closure according to claim 6, wherein, The closer a point on the channel (38) is to the top wall (27), the farther it is from the hinge (18).

8. The container closure according to any one of claims 6 and 7, wherein, The support surface is located within a support plane, which is inclined relative to the reference axis and extends parallel to the return plane (300).

9. The container closure according to any one of claims 6 to 9, wherein, The sealing seat is located in a sealing plane that is inclined relative to the reference axis and extends parallel to the return plane (300).

10. The container closure (10) according to any one of the preceding claims, wherein, The opposing surface (52) is formed on the inner current limiter (32) of the retaining ring (14).

11. The container closure according to any one of the preceding claims, wherein, The cover (16) includes an outer sealing flange (53) that protrudes from the inner surface (29) of the top wall (27) and has a circumferential inner sealing surface facing the reference axis (100), wherein, in the closed position of the container closure (10), the circumferential inner sealing surface (244) abuts against the circumferential outer sealing seat (54) of the pouring wall (20) in a sealing manner.

12. The container closure (10) according to any one of the preceding claims, wherein, The container closure (10) is made of a single plastic component.

13. The container closure (10) according to any one of the preceding claims, wherein, The cover is provided with one or more destructible tamper-evident indicators (56), which extend through a recess (62) formed in the retaining ring (14) and are held by one or more locking surfaces (64) formed in the retaining ring (14) in the closed position of the container closure (10).

14. The container closure (10) according to any one of the preceding claims, wherein, The sealing skirt (42) has a sealing flange (46) that protrudes radially in a direction opposite to the reference axis (100) and at least a portion of the outer sealing surface (44) is formed on the sealing flange (46).

15. The container closure (10) according to claim 14, wherein, The inner sealing skirt (42) has an additional sealing flange (47) that protrudes radially in the direction opposite to the reference axis (100) and an additional portion of the outer sealing surface (44) is formed on the additional sealing flange (47), wherein the additional sealing flange (47) is located between the sealing flange (46) and the top wall (27), and in the closed position of the container closure (10), the additional sealing flange (47) abuts against the circumferential inner sealing seat (48) of the pouring wall (20) in a sealing manner.

16. The preamble of claim 1 or the container closure (10) according to any one of claims 1 to 13, wherein, The inner sealing skirt (42) has a sealing flange (46) and an additional sealing flange (47), the sealing flange (46) protruding radially in a direction opposite to the reference axis (100) and at least a portion of the outer sealing surface (44) is formed on the sealing flange (46), the additional sealing flange (47) protruding radially in a direction opposite to the reference axis (100) and an additional portion of the outer sealing surface (44) is formed on the additional sealing flange (47), wherein the additional sealing flange (47) is located between the sealing flange (46) and the top wall (27), and in the closed position of the container closure (10), the additional sealing flange (47) abuts against the circumferential inner sealing seat (48) of the pouring wall in a sealing manner.

17. The preamble of claim 1 or the container closure (10) according to any one of claims 1 to 16, wherein, The retaining ring (14) has an outer peripheral wall (21) surrounding the tipping wall (20) and an intermediate wall (23) extending radially between the outer peripheral wall (21) and the tipping wall (20), characterized in that the retaining ring (14) includes a reinforcing web (24) extending within a reference plane (240) of the container closure, the reference plane including the reference axis (100) and perpendicular to the pivot (180) of the hinge (18), wherein the reinforcing web (24) connects the outer peripheral wall (21) to the intermediate wall (23) and the tipping wall (20), and wherein the reinforcing web (24) and the intermediate wall (23) have an intersection line extending radially from the outer peripheral wall (21) to the tipping wall (20).

18. The container closure (10) according to claim 17, wherein, The reinforcing web (24) has an intersection line with the outer peripheral wall (21), and the intersection line extends from the intermediate wall (23) to the hinge (18).

19. The container closure (10) according to claim 18, wherein, The reinforcing web (24) has a top surface (26) located in an injection plane that includes the pivot (180) of the hinge (18) and is perpendicular to the reference axis (100) of the container closure (10).

20. The container closure (10) according to any one of claims 17 to 19, wherein, The cover is provided with one or more destructible tamper-evident indicators (56), which extend through a recess (62) formed in the intermediate wall (23) of the retaining ring (14) in the closed position of the container closure (10) and are held by one or more locking surfaces (64) formed in the intermediate wall (23) of the retaining ring (14).

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