EP4284730B1 - Container closure with tamper-evident ring, and method for assembling a container closure of this kind - Google Patents

Description

FIELD OF THE INVENTION

The invention relates to a container closure with a base part which extends around a reference axis of the container closure, a cap part which covers a mouth/opening of the base part in a closed position and leaves the mouth of the base part open in an open position, and a guarantee ring which is separate from the cap part and base part and is intended to give the consumer visible information as to whether the container closure has already been opened. It also relates to a method for assembling such a container closure.

STATE OF THE ART

From the Scripture WO2015/049066 A1 A container closure of the type mentioned at the beginning is known in which the guarantee ring is covered by the cap part and base part in the closed position and is only visible through a transparent wall of the cap part. The base part, the cap part and the hinge together form an injection-molded part that is formed in the open position. This piece is brought into the closed position before the guarantee ring is inserted through the opening in the base part. After the guarantee ring has found its position, a pouring piece is inserted into the opening and assembled with the base part.

The disadvantage of such a closure is the necessary use of a transparent material such as transparent polypropylene for the injection molded part that forms the base part and the cap part. Other materials such as opaque polypropylene or high-density polyethylene (HDPE) are not possible. The disadvantage of closure bodies made of polypropylene is the dust that is generated by friction between the manufactured closure bodies and the conveyor belts of the filling systems.

It is also not possible to choose two different materials or two different colors for the base part and the cap part. With a transparent cap part, the contents of the container are exposed to light through the pouring opening and the bottom of the cap part, which is undesirable in certain cases.

Furthermore, quality control after production is made more difficult by the fact that the guarantee ring is no longer accessible after assembly.

The container closure is necessarily made from at least three separate pieces, especially since the guarantee ring has to be fitted through the opening in the base part. It is therefore not possible to provide a range of container closures which provide the consumer with the same visible information on the authenticity of the container contents, and at least some models of which are made from only two separate pieces.

DESCRIPTION OF THE INVENTION

The invention is based on the object of providing a container closure of the type mentioned at the outset which eliminates at least one of the aforementioned disadvantages of the prior art.

In a container closure with a base part which runs around a reference axis of the container closure, a cap part which covers a drinking opening of the container closure in a closed position and leaves the drinking opening of the container closure open in an open position, and a guarantee ring which is separate from the cap part and base part and which is connected in a form-fitting manner to the cap part and in a hook-like manner to the base part and has a breaking point which breaks when the cap part is opened and causes an irreversible and visible change to the container closure, the problem is solved in that the guarantee ring has an annular bead for the form-fitting connection to the cap part, which does not protrude radially from the base part. and extends in an annular groove of an outer wall of the cap part, which points radially outwards.

Because the ring-shaped bead of the guarantee ring is applied to an uncovered outer wall of the cap part, the cap part can be made of an opaque material if necessary. Numerous materials and colors can be used. The colors of the cap part and the guarantee ring can be selected to create a desired color contrast, e.g. by using complementary colors.

The guarantee ring can be placed on the cap part in the closed position by elastic deformation until the annular bead penetrates into the annular groove and the guarantee ring is connected to the base part in a hook-like manner.

According to a preferred embodiment, the guarantee ring has an indicator part for hook-like connection to the base part, which engages behind a shoulder of the base part, the breaking point being between the bead and the indicator part. The base part preferably has a peripheral wall enclosing the indicator part and a cavity in the base part. When the cap part is opened and the breaking point breaks, the indicator part can fall into a lower region of the cavity due to gravity. If necessary, the wall can have a radially outward-facing window, which is designed in such a way that the indicator part is not visible through the window before the breaking point breaks and only becomes visible through the window after the breaking point breaks in the lower part of the cavity.

According to a preferred embodiment, the indicator part projects radially outwards and the shoulder projects radially inwards. This means that there is no overlap between the outwardly directed indicator part and the inwardly directed bead, which simplifies axial demoulding of the guarantee ring. An additional advantage of this embodiment arises when the cap part is connected to the base part in a hinge-like manner by Rotational movement of the cap part from the closed position does not weaken the hook-like connection between the display part and the shoulder.

According to a preferred embodiment of the invention, the base part is connected to the cap part by a hinge.

The cap portion may be integrally formed with the hinge and the base portion to form a two-piece container closure.

Alternatively, the base part can have a base piece and an anchor ring which engages in an annular groove in the base piece, the anchor ring being formed in one piece with the hinge and the cap part. The container closure then consists of three pieces which may be made from different materials. The breaking point is preferably located axially between the annular bead and the anchor ring. The indicator part is preferably located axially between the breaking point and the anchor ring. The cavity is preferably located axially between the indicator part and the anchor ring.

The hinge and the hook-like connection between the guarantee ring and the base part are preferably located on the same side of a transverse plane that runs through the annular bead. Alternatively, it is also provided that the hinge can be formed in one piece with the guarantee ring.

According to a preferred embodiment, the base part has a connection point, in particular a thread, for connection to a container neck. However, other fastening means are conceivable, e.g. a circumferential fixing bead or a series of elastic locking hooks that are distributed around the circumference of the base part and, when mounted on the container neck, grip behind a circumferential retaining bead of the container neck.

The base part can have a sealing bead that is preferably directed radially outwards to ensure a tight connection to the container neck.

The base part may have a pouring area which forms the drinking opening of the base part.

Alternatively, the container closure may have a spout separate from the base portion, which forms a pouring area and the drinking opening of the container closure, wherein the spout is covered by the cap portion in the closed position.

The break point extends over an angle of preferably more than 90°, preferably more than 180° around the reference axis of the container closure, and may optionally have fragile webs, a tear line or a tear band.

The cap part has a bottom which closes the opening of the base part. Preferably, the outer wall of the cap part tapers from the groove to the bottom.

The invention also relates to a method for assembling a container closure according to the invention, wherein the guarantee ring is placed on the cap part in the closed position by elastic deformation until the annular bead penetrates into the annular groove and the guarantee ring is connected to the base part in a hook-like manner.

BRIEF DESCRIPTION OF THE DRAWINGS

• Fig. 1: eine Schnittansicht eines Behälterverschlusses gemäß einem ersten Ausführungsbeispiel der Erfindung in einer geschlossenen Stellung vor der ersten Öffnung;
• Fig. 2: eine Schnittansicht des Behälterverschlusses gemäß dem ersten Ausführungsbeispiel in der geschlossenen Stellung vor der ersten Öffnung, durch eine quer zur Schnittebene der Figur 1 verlaufende zweite Längsschnittebene;
• Fig. 3: eine Schnittansicht eines Spritzgussteils des Behälterverschlusses gemäß dem ersten Ausführungsbeispiel, in einer offenen Stellung, unmittelbar nachdem es aus der Spritzgussform ausgeworfen worden ist;
• Fig. 4: eine Draufsicht des Spritzgussteils der Figur 3;
• Fig. 5: eine Perspektivansicht eines Garantierings des Behälterverschlusses gemäß dem ersten Ausführungsbeispiel;
• Fig. 6: eine Schnittansicht des Spritzgussteils der Figur 4, nachdem es in die geschlossene Stellung gebracht worden ist, und des Garantierings des Figur 5, bevor er auf das geschlossene Spritzgussteil aufgesetzt wird;
• Figur 7: eine Schnittansicht des Behälterverschlusses gemäß dem ersten Ausführungsbeispiel, in der offenen Stellung nach der ersten Öffnung;
• Figur 8: eine Schnittansicht des Behälterverschlusses gemäß dem ersten Ausführungsbeispiel, in der Schließstellung nach der ersten Öffnung;
• Fig. 9: eine Schnittansicht eines Behälterverschlusses gemäß einem zweiten Ausführungsbeispiel der Erfindung in einer geschlossenen Stellung vor der ersten Öffnung;
• Fig. 10: eine Schnittansicht eines Behälterverschlusses gemäß dem zweiten Ausführungsbeispiel der Erfindung in einer geschlossenen Stellung nach der ersten Öffnung;
• Fig. 11: eine Schnittansicht eines Behälterverschlusses gemäß einem dritten Ausführungsbeispiel der Erfindung in einer geschlossenen Stellung vor der ersten Öffnung;
• Fig. 12: eine Schnittansicht der einzelnen Spritzgussteile, die den Behälterverschluss gemäß dem dritten Ausführungsbeispiel zusammen der Figur 4 bilden, bevor sie zusammengesetzt werden;
• Fig. 13: eine Perspektivansicht der drei Teile eines Behälterverschlusses gemäß einem vierten Ausführungsbeispiel der Erfindung;
• Fig. 14, eine Schnittansicht der drei Teile eines Behälterverschlusses gemäß dem vierten Ausführungsbeispiel der Erfindung;
• Fig. 15, eine Schnittansicht des Behälterverschlusses gemäß dem vierten Ausführungsbeispiel der Erfindung in einer geschlossenen Stellung vor der ersten Öffnung;
• Fig. 16: eine Schnittansicht des Behälterverschlusses gemäß dem vierten Ausführungsbeispiel in der geschlossenen Stellung vor der ersten Öffnung, durch eine quer zur Schnittebene der Figur 15 verlaufende zweite Längsschnittebene;
• Fig. 17: eine Schnittansicht des Behälterverschlusses gemäß dem vierten Ausführungsbeispiel, in der Schließstellung nach der ersten Öffnung;
• Fig. 18: eine Perspektivansicht des Behälterverschlusses gemäß dem vierten Ausführungsbeispiel, in der Schließstellung nach der ersten Öffnung;
• Fig. 19: eine Schnittansicht eines Behälterverschlusses gemäß einem fünften Ausführungsbeispiel, in einer Schließstellung vor der ersten Öffnung;
• Fig. 20: eine Perspektivansicht des Behälterverschlusses gemäß dem fünften Ausführungsbeispiel, in der Schließstellung nach der ersten Öffnung.

Embodiments of the present invention will be described with reference to the accompanying drawings, in which:

• Fig.1 : a sectional view of a container closure according to a first embodiment of the invention in a closed position in front of the first opening;
• Fig.2 : a sectional view of the container closure according to the first embodiment in the closed position in front of the first opening, through a transverse to the cutting plane of the Figure 1 second longitudinal section plane;
• Fig.3 : a sectional view of an injection molded part of the container closure according to the first embodiment, in an open position immediately after it has been ejected from the injection mold;
• Fig.4 : a top view of the injection molded part of the Figure 3 ;
• Fig.5 : a perspective view of a guarantee ring of the container closure according to the first embodiment;
• Fig.6 : a sectional view of the injection molded part of the Figure 4 after it has been brought into the closed position and the guarantee ring of the Figure 5 before it is placed on the closed injection-moulded part;
• Figure 7 : a sectional view of the container closure according to the first embodiment, in the open position after the first opening;
• Figure 8 : a sectional view of the container closure according to the first embodiment, in the closed position after the first opening;
• Fig.9 : a sectional view of a container closure according to a second embodiment of the invention in a closed position in front of the first opening;
• Fig.10 : a sectional view of a container closure according to the second embodiment of the invention in a closed position after the first opening;
• Fig. 11 : a sectional view of a container closure according to a third embodiment of the invention in a closed position in front of the first opening;
• Fig. 12 : a sectional view of the individual injection molded parts which together form the container closure according to the third embodiment of the Figure 4 form before they are assembled;
• Fig. 13 : a perspective view of the three parts of a container closure according to a fourth embodiment of the invention;
• Fig. 14 , a sectional view of the three parts of a container closure according to the fourth embodiment of the invention;
• Fig. 15 , a sectional view of the container closure according to the fourth embodiment of the invention in a closed position in front of the first opening;
• Fig. 16 : a sectional view of the container closure according to the fourth embodiment in the closed position in front of the first opening, through a transverse to the cutting plane of the Figure 15 second longitudinal section plane;
• Fig. 17 : a sectional view of the container closure according to the fourth embodiment, in the closed position after the first opening;
• Fig. 18 : a perspective view of the container closure according to the fourth embodiment, in the closed position after the first opening;
• Fig. 19 : a sectional view of a container closure according to a fifth embodiment, in a closed position in front of the first opening;
• Fig. 20 : a perspective view of the container closure according to the fifth embodiment, in the closed position after the first opening.

In all drawings, individual reference symbols designate identical or similar elements.

DETAILED DESCRIPTION OF EXAMPLES OF IMPLEMENTATION

With reference to the Figures 1 to 8 a first preferred embodiment of a container closure of the present invention is indicated by the reference numeral 10. The closure 10 is intended to be mounted on the neck of a container.

In this embodiment, the container closure 10 is composed of two separate injection-molded parts, namely a closure piece 12 and a guarantee ring 14. The closure piece 12 can be made from a plastic or another material that is compatible with the container contents. A polymer is preferred here, in particular a thermoplastic such as polyethylene or polypropylene. In particular, opaque materials such as opaque polypropylene or high-density polyethylene (HDPE) can be used here. The guarantee ring 14 can be made from a plastic, in particular an opaque plastic, preferably with a color that results in a desired color contrast with the closure piece.

The closure piece 12 , which is individually inserted into the Figures 3 and 4 comprises a base part 16 , a cap part 18 and a hinge 20 which connects the base part 16 to the cap part 18. The hinge 20 is shown here as a snap hinge and enables a pivoting movement of the cap part 18 about a pivot axis which is perpendicular to the cutting plane of the Figure 1 Other types of hinges are also applicable. The base part 16 , the cap part 18 and the hinge 20 are cast together in one piece in the open position, as can be seen from the Figures 3 and 4 visible.

The base part 16 has a fastening region 22 which encloses a reference axis 100 of the container closure 10 , and means for fastening to the container neck, in this embodiment a thread 24 . In the fastening area there is also a sealing skirt 26 which is intended to engage the interior of the container neck when the container closure 10 is placed on the container neck. The sealing skirt 26 can have a circumferential bead or a curvature. In this embodiment the base part 16 further has a pouring area 28 which projects axially in the direction opposite to the fastening area and surrounds a drinking opening 30 .

The cap member 18 includes a base 32 , an outer wall 34 surrounding an inner wall surface 36 of the base 32 , and a gripping projection 38 extending radially outward from the outer wall 34 .

The base 32 can be flat or curved. An annular sealing skirt 40 extends from the inner wall surface 36 of the base 32 and is surrounded by the outer wall 34 at a radial distance. This sealing skirt 40 is intended to engage the interior of the drinking opening 30 of the pouring area 28 when the cap part 18 is in the closed position. The sealing skirt 40 can have a circumferential bead or a curvature.

The outer wall 34 has a lower cylindrical or slightly conical edge region 42 which, in the closed position of the closure piece 12, rests radially on a cylindrical or slightly conical, radially outward-facing seat surface 44 in a connecting region between the pouring region 28 and the fastening region 22 of the base part 14. The cap part 18 thus encloses the pouring region 28 in the closed position. The edge region 42 and the sealing apron 40 allow, if necessary, a liquid- and gas-tight sealing of the space enclosed by the cap part 18 and base part 14. This is advantageous for the use of the closure for aseptic filling.

The seat surface 44 is partially enclosed by a curved peripheral wall 46 which extends axially from the fastening area 22 into the thread 24 opposite direction and extends over an angle of preferably more than 90°, in the example more than 180° around the reference axis 100 of the container closure 10. The seat surface 44 and the peripheral wall 46 are radially spaced from each other and delimit an arcuate cavity 48 into which the lower edge region 42 of the outer wall 34 of the cap part 18 penetrates in the closed position. The arcuate cavity 48 is circumferentially delimited by two stops 50 , as in the Figure 4 The peripheral wall 46 has a radially inwardly projecting shoulder 52 which has a central interruption 53 so that it is in the cutting plane of the Figure 2 is visible in the cutting plane of the Figure 1 but not.

The outer wall 34 of the cap part 18 has a radially outwardly directed annular groove 54 , which is preferably located in a central region of the cap part 18 axially between the bottom 32 and the lower edge region 42 and which is not covered by the curved peripheral wall 46 of the base part 16 in the closed position.

The one in the Figures 5 and 6 The guarantee ring 14 shown has an annular, closed bead 56 projecting inwards in the radial direction, an arcuate display part 58 , and a break point 60 located between the bead 56 and the display part 58. The break point 60 can preferably have fragile webs or a tear-off line, optionally also a tear-off band. The display part 58 has a hook region 62 projecting radially outwards with a central interruption 63 .

The container closure 10 is manufactured as follows. The closure piece 12 is injection molded in the open position of the Figures 3 and 4 manufactured and in a first assembly step into the closed position of the Figure 6 In a second assembly step, the guarantee ring 14 is placed on the cap part 18 by elastic deformation until the annular bead 56 penetrates into the annular groove 54 and a positive connection to the cap part 18 , while the indicator part 58 partially penetrates into the cavity 48 and the hook area 62 engages behind the shoulder 52 of the peripheral wall 46 of the base part 16 , as can be seen from the Figures 1 and 2 The central break 63 of the indicator part 58 coincides with the central break 53 of the shoulder 52 in order to precisely index the position of the indicator part in the circumferential direction. According to a variant, the breaks 53 , 63 can be omitted if necessary.

The indicator part 58 is located partially in an upper region of the cavity 48 , radially between the peripheral wall 46 and the lower edge region 42 of the cap part 18, and circumferentially between the stops 50 , and projects axially out of the cavity 48 so that it remains partially radially visible in front of the first opening. The hinge 20 and the indicator part 58 are located on the same side of a transverse plane 200 which passes through the annular bead 56 .

When the container closure 10 is moved for the first time from the closed position of the Figures 1 and 2 in the open position of the Figure 7 is brought, the indicator part 58 is held by the shoulder 52 and the bead 56 by the groove 54. The breaking point 60 breaks while the bead 56 remains in the groove 54 and the indicator part 58 falls into the lower region of the cavity 48 due to gravity.

If the container closure 10 is returned to the closed position after the first opening, Figure 8 is brought, the indicator part 58 remains in the lower region of the cavity 48 , where it is completely covered by the peripheral wall 46 of the base part 16. This ensures a non-reversible and visible change to the container closure 10. The indicator part 58 remains trapped in the cavity 48 .

The container closure 10 according to the second embodiment is shown in the Figures 9 and 10 and differs from the first embodiment only in that the peripheral wall 46 of the base part 16 , which radially delimits the cavity 48 to the outside, has a Window 64 through which the display part 58 becomes visible after it has fallen into the lower region of the cavity 48 after the first opening. In this embodiment, the hook region 62 of the display part 58 has no interruption and engages behind a shoulder 52 of the peripheral wall 46 , which also has no central interruption.

The container closure 10 according to the third embodiment is shown in the Figures 11 and 12 and differs from the first embodiment in that the container closure 10 has a pouring piece 128 which is separate from the closure piece 12 and which is mounted inside the fastening area 22 of the base part 16 and rests against a shoulder 68 of the fastening area which has a sealing bead 70. This pouring piece 128 forms the pouring area 28 of the container closure. The pouring piece 128 can be mounted before, after or at the same time as the mounting of the guarantee ring 14 .

The container closure 10 according to the fourth embodiment is shown in the Figures 13 to 18 and comprises three separate pieces, namely a base piece 12.1 , a head piece 12.2 and a guarantee ring 14 , wherein the base piece 12.1 and the head piece 12.2 in the assembled state in the Figures 15 to 18 form an assembly 12.3 which is largely identical in form and function to the closure piece 12 of the first embodiment.

The base piece 12.1 comprises a connection area 22 with a thread 24 for connection to a container neck, a pouring area 28 which forms the drinking opening 30 of the container closure 10 , and a curved peripheral wall 146 which projects axially from a flat upper support surface 122 of the fastening area 22 in the direction opposite to the thread 24 and extends over an angle of preferably more than 180°, in the example more than 270°, around the reference axis 100 of the container closure 10. The two ends of the peripheral wall 146 which are opposite one another in the circumferential direction form two lateral stops 150 which form a recess 120 of the base piece on the circumference. The peripheral wall 146 has a shoulder 152 projecting radially inwards and, together with the upper support surface 122 of the fastening region 22, defines a groove 148.

The head piece 12.2 has a cap part 18 , a hinge 20 and an anchor ring 210 which is connected to a lower projection 212 of the hinge.

The anchor ring 210 comprises an annular flat lower support surface 222, an annular flat upper support surface 224 and an arcuate anchor projection 248 , the dimensions of which correspond to the dimensions of the support surface 122 , or the peripheral wall 146 and its shoulder 152 , so that after assembly the anchor projection 248 engages behind the shoulder 152 in a form-fitting or force-fitting manner while the support surface 222 rests on the support surface 122 over a broad area, in such a way that there is no longer any possibility of movement between the anchor ring 210 and the base piece 12.1 , and that the anchor ring 210 and the base piece 12.1 together form a base part 16 which has the same external shape as the base part 16 of the first embodiment.

The hinge 20 is shown here as a snap hinge and enables a pivoting movement of the cap part 18 about a pivot axis 300, which is perpendicular to the cutting plane of the Figure 16 The shoulder 212 of the hinge 20 rests in the recess 120 on the support surface 122 and radially on a support surface 124 of the recess 120 and is held circumferentially against the lateral stops 150. The pivot axis 300 is the intersection line between a transverse plane 400 which runs between the support surface 122 and the annular groove 54 of the cap part 18 in the closed position and an orthoradial plane 500 which runs parallel to the reference axis 100 of the base part 16 and is further away from the reference axis 100 than the outer surface of the peripheral wall 146.

After assembly, the head piece 12.2 and the base piece 12.1 together form an assembly 12.3 which has the same external shape and the same function as the closure piece 12 of the first embodiment, with which Exception: the two pieces 12.1 , 12.2 may consist of two different materials or have different colors. For example, it is possible to manufacture the head piece 12.2 from transparent or opaque polypropylene (PP) and the base piece 12.1 from high-density polyethylene (HDPE).

The anchor ring 210 has a curved peripheral wall 46 which extends over an angle of preferably more than 180°, in the example more than 270° around the reference axis 100 of the container closure 10. The peripheral wall 46 has a shoulder 52 which projects radially inwards and has the same shape and the same function as the shoulder 52 of the first embodiment and, after assembly, lies radially opposite the lower edge region 42 of the outer wall 34 of the cap part 18 and delimits a cavity 48 with the latter and the upper support surface 224 .

The guarantee ring 14 is identical to that of the first embodiment, to which reference is made for a detailed description.

The container closure 10 is manufactured as follows. The three pieces 12.1, 12.2, 14 are manufactured separately by injection molding, with the head piece 12.2 in the open position of the Figure 13 . In a first assembly step, the cap part 18 is brought into the closed position. Then the closed head piece 12.2 is placed on the base piece 12.1 until the anchor projection 248 of the anchor ring 210 is firmly seated behind the shoulder 52. In a third assembly step, the guarantee ring 14 is placed on the cap part 18 by elastic deformation until the annular bead 56 penetrates into the annular groove 54 and creates a positive connection to the cap part 18 , while the indicator part 58 partially penetrates into the cavity 48 and the hook area 62 engages behind the shoulder 52 of the peripheral wall 46 of the anchor ring 16 , as can be seen from the Figures 15 and 16 visible.

If necessary, the order of the three assembly steps can be changed. The cap part 18 can, for example, be brought into the closed position after the open head piece 12.2 has been placed on the base piece 12.1 . The guarantee ring 14 can be placed on the open head piece 12.2 if necessary.

After assembly, the indicator part 58 is located partially in an upper region of the cavity 48 , radially between the peripheral wall 46 and the lower edge region 42 of the cap part 18 , and partially outside the cavity 48 , so that it remains partially radially visible before the first opening. When the container closure 10 is opened for the first time from the closed position of the Figures 15 and 16 is brought into the open position, the indicator part 58 is held by the shoulder 52 and the bead 56 by the groove 54. The break point 60 breaks, while the bead 56 remains in the groove 54 and the indicator part 58 falls into the lower area of the cavity 48 due to gravity. When the container closure 10 is returned to the closed position of the Figures 17 and 18 is brought, the indicator part 58 remains in the lower region of the cavity 48 on the upper support surface 224 of the anchor ring 210 , where it is completely covered by the peripheral wall 46 of the base part 16. This ensures a permanent and visible change to the container closure 10. The indicator part 58 remains trapped in the cavity 48 .

The embodiment of the Figures 19 and 20 differs from the embodiment of the Figures 13 to 18 merely in that the peripheral wall of the anchor ring 210 has recesses or windows 346 , which may correspond with recesses 446 of the peripheral wall 146 of the base piece 12.1 and through which, before the separation of the fracture point 60 (on Figure 19 ) the cavity 58 and after separation of the fracture point 60 (on Figure 20 ) the display part 58 becomes visible.

Other variants are provided. The outer guarantee ring 14 according to the invention can be applied to a container closure with a closure piece 12 and a pouring piece 128, wherein the closure piece 12 has a base part 16 and a cap part 18, which in the closed position and the pouring piece 128 is inserted into the closed closure piece 12. It can also be used with a container closure without a hinge, in particular with a so-called push-pull container closure.

Claims (19)

1. Container closure (10) comprising a base part (16), which extends about a reference axis (100) of the container closure (10), a cap part (18), which, in a closed position, covers a drinking opening (30) of the container closure (10) and, in an open position, leaves the drinking opening (30) of the container closure (10) open, and a tamper-evident ring (14), which is separate from the cap part (18) and base part (16), is form-fittingly connected to the cap part (18) and hooked to the base part (16) and has a breaking zone (60) which breaks when the cap part (18) is opened and causes a non-reversible and visible change in the container closure (10), characterized in that, to be form-fittingly connected to the cap part (18), the tamper-evident ring (14) has an annular bead (56) which is not radially covered by the base part (16) and extends into an annular groove (54) of an outer wall (34) of the cap part (18), which points radially outward.
2. Container closure (10) according to claim 1, characterized in that, to be hooked to the base part (16), the tamper-evident ring (14) has an indicator part (58) which engages behind a shoulder (52) of the base part, the breaking zone (60) being between the bead (56) and the indicator part (58).
3. Container closure (10) according to claim 2, characterized in that the base part (16) has a circumferential wall (46) which encloses the indicator part (58) and a cavity (48) of the base part, the indicator part (58) being capable of falling into a lower region of the cavity (48) due to gravity when the cap part (18) is opened and the breaking zone (60) is broken.
4. Container closure according to claim 3, characterized in that the circumferential wall (46) has a window (64) which is directed radially outward and is configured such that the indicator part (58) is visible in the lower part of the cavity through the window (64) only after the breaking zone (60) has broken.
5. Container closure (10) according to any of claims 2 to 4,
   characterized in that the indicator part (58) projects radially outward and the shoulder (52) projects radially inward.
6. Container closure (10) according to any of the preceding claims,
   characterized in that the base part (16) is connected to the cap part (18) by a hinge (20).
7. Container closure (10) according to claim 6, characterized in that the cap part (18) is integral with the hinge (20) and the base part (16).
8. Container closure (10) according to claim 6, characterized in that the base part (16) has a base piece (12.1) and an anchor ring (210) which latches in an annular groove (148) of the base piece (16), the anchor ring (210) being integral with the hinge (20) and the cap part (18).
9. Container closure (10) according to claim 8, characterized in that the breaking zone (60) is located axially between the annular bead (56) and the anchor ring (210).
10. Container closure (10) according to claim 9 and claim 2,
    characterized in that the indicator part (58) is located axially between the breaking zone (60) and the anchor ring (210).
11. Container closure (10) according to claim 10 and claim 3,
    characterized in that the cavity (48) is located axially between the indicator part (58) and the anchor ring (210).
12. Container closure (10) according to any of claims 6 to 11,
    characterized in that the hook connection between the tamper-evident ring (14) and the base part (16) and the hinge (20) are located on the same side of a transverse plane (200) which extends through the annular bead (56).
13. Container closure (10) according to any of the preceding claims,
    characterized in that the base part (16) has a connecting region (22), in particular a thread (24), for connection to a container neck.
14. Container closure (10) according to any of the preceding claims,
    characterized in that the base part (16) has a sealing bead (26) which is preferably directed radially outward.
15. Container closure (10) according to any of the preceding claims,
    characterized in that the base part (16) has a spout region (28) which forms the drinking opening (30) of the container closure (10).
16. Container closure (10) according to any of the preceding claims,
    characterized in that it has a spout piece (128) which is separate from the base part (16) and forms the drinking opening (30) of the container closure (10).
17. Container closure (10) according to any of the preceding claims,
    characterized in that the cap part (18) has a bottom (32) and the outer wall of the bottom (32) tapers from the groove (54) to the bottom (32).
18. Container closure (10) according to any of the preceding claims,
    characterized in that the cap part (18) is produced from an opaque material.
19. Method for assembling a container closure (10) according to any of the preceding claims, characterized in that the tamper-evident ring (14) is placed on the cap part (18) in the closed position by elastic deformation until the annular bead (56) penetrates the annular groove (54) and the tamper-evident ring (14) is hooked to the base part (16).

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