Container closure with a sealing surface and a support surface facing away from the sealing surface

Abstract

A container closure (10) comprises a holding ring (14) extending around a reference axis (100), a lid (16) and a hinge (18) connecting the holding ring (14) to the lid (16), The lid (16) comprises a top wall (27) and an inner sealing skirt (42) which has a circumferential outer sealing surface (44) facing away from the reference axis (100), which in a closed position of the container closure (10) tightly abuts against a circumferential inner sealing seat (48) of a pouring wall (20) facing the reference axis (100). The sealing skirt (42) has a circumferential support surface (50) facing the reference axis (100), which is further away from the inner surface (29) of the top wall (27) than the outer sealing surface (44) and, in the closed position, bears against a circumferential counter surface (52) of the holding ring (14) facing away from the reference axis (100).

Description

Container closure with a sealing surface and a support surface facing away from the sealing surface

[0001] The invention relates to a container closure with a holding ring which extends around a reference axis of the container closure, a lid and a hinge which connects the holding ring to the lid.

[0002] A closure for oil bottles known from WO 2007 / 006957A1 comprises a base extending about a reference axis of the container neck, a lid and a hinge connecting the base to the lid. The base has a pouring wall that surrounds a mouth of the container closure. The lid comprises a top wall and an inner sealing skirt which extends from an inner surface of the top wall and has a circumferential sealing surface facing away from the reference axis which, in a closed position of the container closure, bears tightly against a circumferential inner sealing seat of the pouring wall facing the reference axis. The base has a tear-off inner sealing disc which prevents access to the contents of the container before first use and protects the contents. The inner sealing disc is connected to the pouring wall via a thin peripheral film, which forms a tear line of the seal. After the first opening, the sealing disc forms waste that must be disposed of separately from the container closure. Furthermore, the seal between the sealing surface and the seal seat after the first opening may prove insufficient to withstand an impact that may occur, for example, if the container falls to the ground.

[0003] In EP1901967B1, it has been proposed to improve the tightness of the seal by providing a groove to form the seal seat, the sealing surface being formed on an end bead of the sealing skirt which penetrates into the groove. However, the opening of the closure is made more difficult and is jerky once the engagement force has been overcome.

[0004] The problem underlying the invention is to equip a container closure of the type mentioned above with means which avoid the need for a sealing disc to be separated from the closure, while still ensuring a sufficient seal before and after the first opening and enabling a jerk-free opening.

[0005] In a container closure, which comprises a holding ring extending around a reference axis of the container closure, a lid and a hinge connecting the holding ring to the lid, the holding ring having a pouring wall surrounding a mouth of the container closure, the lid comprising a top wall and an inner sealing skirt extending from an inner surface of the top wall and having a circumferential sealing surface facing away from the reference axis, which, in a closed position of the container closure, bears in a sealing manner against a circumferential inner sealing seat of the casting wall facing the reference axis, the problem is solved according to a first aspect of the invention in that the sealing skirt has a circumferential support surface facing the reference axis, which is further away from the inner surface of the top wall than the sealing surface and, in the closed position, bears against a circumferential counter surface of the holding ring facing away from the reference axis. More specifically, the outer sealing surface, viewed in any axial section plane containing the reference axis and crossing the support surface, is located axially between the support surface and an intersection of the sealing skirt with the top wall.

[0006] The contact of the support surface with the counter surface limits the elastic deformation of the sealing skirt inwards, which is caused by the contact of the sealing surface with the seal seat, and ensures a controlled pressure on the seal seat. In this way, sufficient sealing of the container closure is achieved, making a sealing disc superfluous.

[0007] Since the counter surface is part of the holding ring and is connected to the pouring wall, it is convenient to keep small the distance between the two in order to limit the amount of material used for this connection. In a preferred embodiment, the support surface is formed on an end edge of the sealing skirt facing away from the base.

[0008] Preferably, the counter surface of the holding ring is bevelled and faces the top wall. The force required to close the container closure increases gradually until the closed position is reached.

[0009] In order to prevent the contents of the container from accumulating between the counter surface and the pouring wall, the holding ring preferably has one or more return openings or gaps.

[0010] In order to direct a gravity-induced backflow of the liquid into the container, the holding ring can have a channel between the counter surface and the pouring wall, which preferably lies in a support plane slanted to the reference axis, which preferably runs parallel to a pivot axis of the hinge. In one embodiment, points of the channel are closer to the top wall the further away they are from the hinge. The support surface is preferably located in a support plane that is slanted to the reference axis and runs parallel to the return flow plane. The seal seat is preferably located in a sealing plane slanted relative to the reference axis and running parallel to the return flow plane.

[0011] In a preferred embodiment, the counter surface is formed on an inner flow limiter of the holding ring, which may be connected to the pouring wall by webs. The flow limiter can comprise a limiting wall, which leaves open a mouth and possibly a ventilation opening.

[0012] In an embodiment, the sealing skirt has a sealing bead on which at least part of the sealing surface is formed and which projects radially in the direction opposite to the reference axis. The inner sealing skirt can have an additional sealing bead which projects radially in the direction opposite to the reference axis and on which an additional part of the outer sealing surface is formed. The additional sealing bead can be located between the sealing bead and the top wall. In the closed position of the container closure, the additional sealing bead bears in a sealing manner against the circumferential inner sealing seat of the pouring wall. Providing an additional sealing bead provides an even more secure sealing.

[0013] Alternatively, or additionally, the lid can be provided with an outer sealing bead, which protrudes from the inner surface of the top wall and has a circumferential inner sealing surface that faces the reference axis, such that the circumferential inner sealing surface, in a closed position of the container closure, bears in a sealing manner against a circumferential outer sealing seat of the pouring wall. Adding an outer sealing bead provides an even more secure sealing and provide additional resistance to side impacts. Where appropriate, the seal seat has a conical or cylindrical shape. Alternatively, it is also envisaged that the seal seat is formed by a groove in the pouring wall.

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

[0015] In a preferred embodiment, the container closure consists of a single piece of plastic.

[0016] According to one embodiment, the holding ring comprises a peripheral outer wall which protrudes axially in a direction opposed to the pouring wall and is preferably provided with one or more fastening protrusions intended for fastening the holding ring onto a container neck. The fastening protrusions can be resilient latching hooks, which are distributed around the circumference of the holding ring so as to engage behind a circumferential retaining bead of the container neck when mounted on the container neck. Other fastening protrusions are conceivable, e.g. a circumferential fixing bead and / or a thread.

[0017] The holding ring can be provided with an inner skirt, which protrudes axially in a direction opposed to the pouring wall, inside the peripheral outer wall of the holding ring, to provide a static seal between the holding ring and the container neck and can also have a centring function.

[0018] In one embodiment, the holding ring is provided with an intermediate wall from which the inner skirt and the peripheral outer wall of the holding ring protrude.

[0019] In one embodiment, the lid is provided with one or more breakable tamper-evident indicators which, in the closed position of the container closure, extend through recesses formed in the holding ring and are retained by one or more latching surfaces formed in the holding ring. In particular, the one or more recesses and the one or more latching surfaces can be formed in the intermediate wall.

[0020] According to a second aspect of the invention, which may be combined with the first aspect described hereinbefore, there is provided a container closure, which comprises a holding ring extending around a reference axis of the container closure, a lid and a hinge connecting the holding ring to the lid, the holding ring having a pouring wall surrounding a mouth of the container closure, the lid comprising a top wall and an inner sealing skirt extending from an inner surface of the top wall and having a circumferential sealing surface facing away from the reference axis, which, in a closed position of the container closure, bears in a sealing manner against a circumferential inner sealing seat of the casting wall facing the reference axis. In order to provide a better seal, the inner sealing skirt has a sealing bead which projects radially in the direction opposite to the reference axis and on which the at least part of the outer sealing surface is formed, and an additional sealing bead which projects radially in the direction opposite to the reference axis and on which an additional part of the outer sealing surface is formed, wherein the additional sealing bead is located between the sealing bead and the top wall and, in the closed position of the container closure, bears in a sealing manner against the circumferential inner sealing seat of the pouring wall.

[0021] The sealing bead and the additional sealing bead run preferably parallel to one another, at an axial distance from another preferably less than 2 mm measured at their respective radial tip portions.

[0022] In order to better control the contact pressure between the sealing bead and the inner sealing seat, the sealing skirt is preferably provided with a circumferential support surface facing the reference axis, which is further away from the inner surface of the top wall than the outer sealing surface and which, in the closed position, bears against a circumferential counter surface of the holding ring facing away from the reference axis. Alternatively, or additionally, the sealing skirt can be provided with a circumferential support surface facing the reference axis, which is located axially between the outer sealing surface and which, in the closed position, bears against a circumferential counter surface of the holding ring facing away from the reference axis.

[0023] According to yet another aspect of the invention, which may be combined with the first or second aspects described hereinbefore, there is provided a container closure, which comprises a holding ring extending around a reference axis of the container closure, a lid and a hinge connecting the holding ring to the lid, the holding ring having a pouring wall surrounding a mouth of the container closure, the lid comprising a top wall and an inner sealing skirt extending from an inner surface of the top wall and having a circumferential sealing surface facing away from the reference axis, which, in a closed position of the container closure, bears in a sealing manner against a circumferential inner sealing seat of the casting wall facing the reference axis. The holding ring has a peripheral outer wall, which surrounds the pouring wall and an intermediate wall, which extends radially between the peripheral outer wall and the pouring wall. In order to provide a reinforcement of the structure of the container closure in the hinge region, in particular to withstand shocks applied to the container closure in the hinge region in the closed position, the holding ring comprises a reinforcing web, which extends in a reference plane of the container closure, which contains the reference axis and is perpendicular to a pivot axis of the hinge, wherein the reinforcing web connects the peripheral outer wall to the intermediate wall and to the pouring wall, and wherein the reinforcing web has an intersection with the intermediate wall, which extends radially from the outer peripheral wall to the pouring wall (20. To provide a further reinforcement of the hinge region against deformation, the reinforcing web has an intersection with the outer peripheral wall, which preferably extends from the intermediate wall to the hinge.

[0024] In one embodiment, the reinforcing web has a top face, which lies in an injection plane, which contains the pivot axis of the hinge and is perpendicular to the reference axis of the container closure. This top face can provide an injection point, if the container closure is moulded in one piece in the open position.

[0025] Embodiments of the present invention will be described with reference to the accompanying drawings in which:is an isometric view of a container closure according to a first embodiment of the invention, in an open position out of the mould, i.e. prior to a first closing;is another isometric view of the container closure of, in the open position prior to the first closing;is a side view of the container closure ofin the open position prior to the first closing;is a sectional side view of the container closure ofin the open position before a first closing;is a top view of the container closure ofin the open position before a first closing;is a sectional side view of the container closure ofin the closed position before a first opening, through a section plane VI-VI illustrated in;is a sectional top view of the container closure offixed to a container neck in the closed position before the first opening, through a section plane VII-VII illustrated in;is a front sectional view of the container closure offixed to a container neck in the closed position before the first opening, through a section plane VIII-VIII illustrated in;is a sectional side view of the container closure offixed to a container neck in the closed position before the first opening, through a section plane IX-IX illustrated in;is an isometric view of the container closure ofin the closed position before the first openingis an isometric view of the container closure ofin the closed position after the first openingis a side view of another embodiment of the container closure in an open position prior to a first closing;is a sectional side view of the container closure ofin the open position before a first closing;is a top view of the container closure ofin the open position before a first closing;is a sectional side view of the container closure ofin the closed position before a first opening;is a detailed view of a circled area A of;is a side view of the container closure ofin an open position after the first opening;is a sectional side view of the container closure ofin the open position after the first opening; andis a sectional side view of the container closure ofin the closed position after the first opening.

[0026] Identical or corresponding reference numerals refer to the same or corresponding parts in each of the figures and in the different embodiments.

[0027] With reference to the figures1to11, a container closure10is intended to be mounted on the neckCNof a container (see figures8and9). The container closure10can be made of a plastic or other material that is compatible with the contents of the container. Preferred here is a polymer, in particular a thermoplastic material such as polyethylene or polypropylene.

[0028] The container closure10comprises a holding ring14, a lid16and a hinge18connecting the holding ring14to the lid16. The hinge18is shown here as a snap-on hinge and enables a pivoting movement of the lid16about a pivot axis180, which is perpendicular to the sectional plane of.

[0029] The holding ring14, the lid16and the hinge18are preferably moulded together in one piece in the open position of Figures1to5, which can be therefore designated as moulding position.

[0030] The holding ring14surrounds a reference axis100of the container closure10and has a pouring wall20, which surrounds a mouth200of the holding ring14and of the container closure10, a peripheral outer wall21, which surrounds the pouring wall20and an intermediate wall23, which extends radially between the peripheral outer wall21and the pouring wall20. The peripheral outer wall21is provided with protrusions22for fastening the holding ring14to the container neckCN. The fastening protrusions can include a series of resilient latching hooks22, which are distributed around the circumference of the holding ring and engage behind a circumferential retaining bead of the container neck when mounted on the container neck. Other fastening protrusions are conceivable, e.g. a circumferential fixing bead and / or a thread.

[0031] The pouring wall20surrounds an inner peripheral wall32of the holding ring14, and a channel38is formed between the inner peripheral wall32and the pouring wall20. Gaps33in the peripheral wall32provide return flow paths to the mouth200of the holding ring14for any liquid collected by the channel38. The channel38lies preferably in a return plane300, which is slanted with respect to the reference axis100and runs parallel to the pivot axis180of the hinge18. This ensures that liquid collected in the channel38returns to the mouth200of the holding ring14and to the container by gravity, when the reference axis100of the container closure10is upright.

[0032] The holding ring14can be provided with a flow limiter34, which may include a plate or a set of tabs34, which protrudes radially and preferably axially from the inner peripheral wall32and partially cover the mouth200. The mouth200of the container closure, however, remains opened in the moulding position, i.e. the container closure10is not provided with any tearable disc or membrane closing the holding ring14before the first opening.

[0033] A reinforcing web24connects the peripheral outer wall21to the intermediate wall23and / or to the pouring wall20in the region of the hinge18. More specifically, the reinforcing web24extends in a radial reference plane240of the container closure, which contains the reference axis100and is perpendicular to the pivot axis180of the hinge18. The intersection of the reinforcing web24with the intermediate wall23extends from the outer peripheral wall21to the pouring wall20. The intersection of the reinforcing web24with the outer peripheral wall21preferably extends from the intermediate wall23up to a central portion25of the hinge18. The web has a top face26, which is preferably flat and can advantageously be used as a point of injection of the constitutive material of the container closure10in the mould when the container closure is produced by injection moulding. A distanceD(see) measured parallel to the reference axis100from the intermediate wall23to an injection plane400containing the top face26is preferably greater than5mm.

[0034] The lid16comprises a top wall27, a peripheral wall28surrounding an inner surface29of the top wall27, and a gripping projection30extending radially outwardly from the peripheral wall28and optionally formed by a radial extension of the top wall27as shown. The top wall27can be flat or curved.

[0035] An annular inner sealing skirt42protrudes from the inner surface29of the top wall27. The annular inner sealing skirt42, which is surrounded by the circumferential wall28at a radial distance, is provided with an outer sealing surface44, which faces radially outwards. The outer sealing surface44can be formed by one or preferably two radially outwardly projecting beads46,47, and is intended to come into sealing contact in the closed position with an inner sealing seat48which is formed by the pouring wall20and faces radially inwards. If two projecting beads46,47are provided, they are preferably axially spaced apart from one another, at a distance which is preferably more than0,5mm and less than5mm, measured tip to tip and preferably constant. Here, each projecting bead46,47lies in a slanted sealing plane which is substantially parallel to the return plane300. Points of the sealing surface44are closer to the top wall27the further they are from the pivot axis180of the hinge18. The projecting beads46are preferably close to a free edge420of the sealing skirt42, which also lies in a slanted plane substantially parallel to the return plane300.

[0036] The inner sealing skirt42has a circumferential support surface50, which is directed radially inwards and is further away from the inner surface29of the top wall27than the outer sealing surface44. In other words, viewed in any axial section plane containing the reference axis100and crossing the support surface50, the outer sealing surface44is located axially between the support surface50and an intersection of the sealing skirt42with the top wall27. The support surface50can be formed, for example, at the lower free edge240of the inner sealing skirt42and is intended to bear against a circumferential counter surface52of the holding ring14facing away from the reference axis100in the closed position. The counter surface52can be bevelled so as to face the top wall27. It is preferably formed by the inner peripheral wall32. The support surface50lies in a support plane slanted to the reference axis, which is substantially parallel to the return plane300.

[0037] The projection of the inner sealing skirt42on a plane perpendicular to the reference axis100is a circle or is at least substantially circular. This is also true from the pouring wall20,and the inner peripheral wall32of the holding ring14. This implies that the each projecting bead46,47, inner sealing seat48the channel38and the counter surface52, which all lie in planes parallel to the return plane300, are elliptical or substantially elliptical.

[0038] When the lid16is moved from the open position of Figures1to5to the closed position of figures6to10, the slanted free edge420ensures that the inner skirt42follows a closing path which minimises an interference with the pouring wall20. The lower free edge420of the sealing skirt42penetrates smoothly into the annular space defined by the pouring wall20and the counter surface52. The pouring wall20comes into contact with the beads46,47and pushes them radially inwards. The support surface50bears against the slanted counter surface52, which limits the elastic deformation of the sealing skirt and increases the pressure on the seal seat.

[0039] The container closure10has one or more tamper-evident indicators56connected to the lid20by predetermined breaking regions58. Each tamper-evident indicator56has at least one latching projection60which, in the closed position before the first opening, is received in a recess62of the holding ring14and engages behind a latching surface64of the holding ring14, see Figures8and10. After the first opening, the indicator tamper-evident indicator56remains captured in the recess62, as illustrated in.

[0040] The holding ring14can be provided with an additional sealing skirt66, which bears against an inner side of the upper edge of the container neckCN, to provide an additional sealing interface and a centring of the holding ring14on the container neckCN.

[0041] A second embodiment of the invention is shown in figures12to19. Reference numerals refer to the same or corresponding parts in the first and second embodiments. The description given above of the first embodiment is also valid for the second embodiment, except for the differences described below and illustrated in the figures12to19.

[0042] The lid16comprises an outer sealing bead53surrounding the inner sealing skirt42and intended to come into sealing contact, in the closed position, with an outer sealing seat or sealing lip54formed by the pouring wall20, facing radially outwards and lying in a plane500perpendicular to the reference axis100. The outer sealing surface44is formed by a single radially outwardly projecting bead, although a plurality of beads is also an option. Remarkably, thanks to the two sealing beads46,47of the first embodiment or to the sealing beads44,53of the second embodiment, both embodiments provide a container closure10for liquids, such as edible oil, which does not require a tearable membrane or disc to close and seal the mouth200of the holding ring14before the first opening.

[0043] Moreover, the flow limiter34includes a restriction wall34, which can be conical and partially covers the mouth200. The restriction wall34can be provided with a ventilation aperture to ensure pressure equalisation between the interior of the container and the environment when pouring out the contents of the container.

[0044] The inner peripheral wall32of the second embodiment differs from that of the first embodiment in that it is continuous, i.e. without gaps. Through holes133in the channel38provide return flow paths to the mouth200of the holding ring14for any liquid collected by the channel38.

[0045] The container closure10has a single arcuate tamper-evident indicator56connected to the lid20by predetermined breaking regions58. The tamper-evident indicator56has a latching projection60which, in the closed position before the first opening, is received in a recess62of the holding ring14and engages behind a latching surface64of the holding ring14, see. After the first opening, the indicator tamper-evident indicator56remains captured in the recess62, see.

[0046] In this embodiment, the additional sealing skirt66of the holding ring14bears against an inner side of the upper edge of the container neckCN.

Claims

A container closure (10) comprising a holding ring (14) extending about a reference axis (100) of the container closure (10), a lid (16) and a hinge (18) connecting the holding ring (14) to the lid (16), the holding ring having a pouring wall (20) which surrounds a mouth(200) of the container closure (10), the lid (16) comprising a top wall (27) and an inner sealing skirt (42) which protrudes from an inner surface (29) of the top wall (27) and has a circumferential outer sealing surface (44) facing away from the reference axis (100), wherein the circumferential outer sealing surface (44), in a closed position of the container closure (10), bears in a sealing manner against a circumferential inner sealing seat (48) of the pouring wall (20), characterised in that the sealing skirt (42) has a circumferential support surface (50) facing the reference axis (100), which is further away from the inner surface (28) of the top wall (27) than the outer sealing surface (44) and, in the closed position, bears against a circumferential counter surface (52) of the holding ring (14) facing away from the reference axis (100).The container closure (10) of claim 1, wherein the support surface (50) is formed on an end edge of the sealing skirt (42) facing away from the base.The container closure (10) of one of the preceding claims, wherein the counter surface (52) of the holding ring (14) is bevelled and faces the top wall (27).The container closure (10) of one of the preceding claims, wherein the holding ring (14) has one or more return openings (40) between the counter surface (52) and the pouring wall (20).The container closure (10) of one of the preceding claims, wherein the holding ring (14) has a channel (38) between the counter surface (52) and the pouring wall (20).The container closure (10) of claim 5, wherein the channel (38) lies in a return flow plane (300) which is slanted to the reference axis and runs parallel to a pivot axis (180) of the hinge (18).The container closure of claim 6, wherein points of the channel (38) are located the closer to the top wall (27) the further away they are from the hinge (18).The container closure of one of claims 6 to 7, wherein the support surface lies in a support plane which is slanted to the reference axis and runs parallel to the return flow plane (300).The container closure of one of claims 6 to 9, wherein the sealing seat (48) lies in a sealing plane slanted to the reference axis and running parallel to the return flow plane (300).The container closure (10) of one of the preceding claims, wherein the counter surface (52) is formed on an inner flow limiter (32) of the holding ring (14).The container closure of any one of the preceding claims, wherein the lid (16) comprises an outer sealing bead (53) which protrudes from the inner surface (29) of the top wall (27) and has a circumferential inner sealing surface facing the reference axis (100), wherein the circumferential inner sealing surface (244), in a closed position of the container closure (10), bears in a sealing manner against a circumferential outer sealing seat (54) of the pouring wall (20),The container closure (10) of one of the preceding claims, wherein the container closure (10) consists of a single piece of plastic.The container closure (10) of one of the preceding claims, wherein the lid is provided with one or more breakable tamper-evident indicators (56) which, in the closed position of the container closure (10), extend through recesses (62) formed in the holding ring (14) and are retained by one or more latching surfaces (64) formed in the holding ring (14).The container closure (10) of one of the preceding claims, wherein the sealing skirt (42) has a sealing bead (46) which projects radially in the direction opposite to the reference axis (100) and on which the at least part of the outer sealing surface (44) is formed.The container closure (10) of claim 14, wherein the inner sealing skirt (42) has an additional sealing bead (47) which projects radially in the direction opposite to the reference axis (100) and on which an additional part of the outer sealing surface (44) is formed, wherein the additional sealing bead (47) is located between the sealing bead (46) and the top wall (27) and, in the closed position of the container closure (10), bears in a sealing manner against the circumferential inner sealing seat (48) of the pouring wall (20).A container closure (10), according to the preamble of claim 1 or to any one of claims 1 to 13, wherein the inner sealing skirt (42) has a sealing bead (46) which projects radially in the direction opposite to the reference axis (100) and on which the at least part of the outer sealing surface (44) is formed, and an additional sealing bead (47) which projects radially in the direction opposite to the reference axis (100) and on which an additional part of the outer sealing surface (44) is formed, wherein the additional sealing bead (47) is located between the sealing bead (46) and the top wall (27) and, in the closed position of the container closure (10), bears in a sealing manner against the circumferential inner sealing seat (48) of the pouring wall.A container closure (10), according to the preamble of claim 1 or to any one of claims 1 to 16, wherein the holding ring (14) has a peripheral outer wall (21), which surrounds the pouring wall (20) and an intermediate wall (23), which extends radially between the peripheral outer wall (21) and the pouring wall (20), characterised in that the holding ring (14) comprises a reinforcing web (24), which extends in a reference plane (240) of the container closure, which contains the reference axis (100) and is perpendicular to a pivot axis (180) of the hinge (18), wherein the reinforcing web (24) connects the peripheral outer wall (21) to the intermediate wall (23) and to the pouring wall (20), and wherein the reinforcing web (24) has an intersection with the intermediate wall (23), which extends radially from the outer peripheral wall (21) to the pouring wall (20).The container closure (10) of claim 17, wherein the reinforcing web (24) has an intersection with the outer peripheral wall (21), which extends from the intermediate wall (23) to the hinge (18).The container closure (10) of claim 18, wherein the reinforcing web (24) has a top face (26), which lies in is an injection plane, which contains the pivot axis (180) of the hinge (18) and is perpendicular to the reference axis (100) of the container closure (10).The container closure (10) of one of claims 17 to 19, wherein the lid is provided with one or more breakable tamper-evident indicators (56) which, in the closed position of the container closure (10), extend through recesses (62) formed in the intermediate wall (23) of the holding ring (14) and are retained by one or more latching surfaces (64) formed in the intermediate wall (23) of the holding ring (14).

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