WO2021064185A1

WO2021064185A1 - Container closure

Info

Publication number: WO2021064185A1
Application number: PCT/EP2020/077682
Authority: WO
Inventors: Georg SÜSS
Original assignee: Alpla Werke Alwin Lehner Gmbh & Co. Kg
Priority date: 2019-10-04
Filing date: 2020-10-02
Publication date: 2021-04-08
Also published as: EP4037989A1

Abstract

The invention relates to a container closure (11) made from plastic and comprising a retaining ring (13) for fastening the closure (11) to a container (29) with an upper and a lower edge (35, 36), a lid (15) connected to the retaining ring (13), an articulation (17), which connects the lid (15) to the retaining ring (13) and about which the lid (15) can be pivoted relative to the retaining ring (13) from a closed position into a first open position and vice versa, and a sealing element (25), which is formed on the inside of the lid (15) and is able to seal a pouring opening (27) of the container (29) in the closed position. The container closure (11) further comprises a first projection (21), which is formed on the retaining ring (13), and a second projection (23), which is formed on the lid (15). The first and the second projection (21, 23) engage in one another in the first open position, locking the lid (15) in the first open position. The sealing element (25) has one height and has a retaining tongue (39), with the height of the sealing element (25) being higher in the area of the articulation (17) than on the remaining circumference of the sealing element (25). The lid (15) can be pivoted into a second open position, in which the retaining tongue (39) can rest against the open edge (47) of the pouring opening (27) or the upper edge (35) of the retaining ring (13).

Description

Container closure

Field of the invention

The invention relates to a container closure according to the preamble of claim 1.

State of the art

From the prior art in the field of plastic closure caps, container closures are known which have a lid arranged in an articulated manner on a retaining ring, whereby the lid is also held captive on the container. This folding function of the lid is particularly important for food containers, since the lid does not have to be stored separately and can therefore neither become dirty nor lost.

The cover can be pivoted around the hinge from a closed position into an oven position. It is known that the lid can be locked in the open position on the retaining ring. For this purpose, a first extension formed on the cover can latch in a second extension formed on the retaining ring in the open position of the cover. This prevents the lid from accidentally falling into the pouring stream of the filling material while the container is in use.

After using the container, the locking can be released and the lid can be pivoted from the open position into the closed position in order to close the pouring opening.

So that the lock engages between the two extensions, the lid has to be pivoted through a large pivoting range of approximately 200 degrees, which is impractical for the user.

Object of the invention

The disadvantages of the described prior art result in the object of improving a container closure with a pivotable lid. In particular, the aim of the invention is to improve the user-friendliness of the container closure for the end consumer as well as for the industrial filler. description

The object set is achieved in the case of a container closure through the features cited in the characterizing section of claim 1. Further developments and / or advantageous design variants are the subject of the dependent claims.

The invention is preferably characterized in that the sealing element has a height and has formed a retaining tongue in that the height of the sealing element in the area of the joint is higher than on the rest of the circumference of the sealing element, and that the cover can be pivoted into a second open position, in which the retaining tongue can rest against the open edge of the pouring opening or the upper edge of the retaining ring. The user can therefore choose individually between two open positions of the cover. Depending on the filling level of the container, the first or the second open position can be advantageous. If the contents of the product are small, the container must be more inclined for pouring. In this case, the cover is advantageous in the first open position, in which it is opened further, since the cover is further away from the pouring stream. If the container is still full, it is advantageous when pouring the lid if it is in the second position, since the lid can serve as protection against spillage in this folded position to a lesser extent. It has been found to be useful if the retaining tongue has a tongue tip that corresponds to the highest point of the sealing ring. The tongue-like shape with a raised tongue tip enables the sealing ring to be easily removed from and inserted into the pouring opening when opening or closing. It is advantageous if the holding tongue can be elastically deformed when it is pressed against the open edge of the pouring opening.

Appropriately, the increase in height is stepless on both sides of the tongue tip. As a result, the retaining tongue can slide into and out of the pouring opening without getting caught on the open edge of the pouring opening.

It has proven to be advantageous if the holding tongue along the circumference of the sealing ring has a length which is defined in that the holding tongue includes an opening angle with the center point of the cover which is between 90 and 40 degrees, preferably between 80 and 50 degrees particularly preferably between 70 and 60 degrees. The claimed length of the retaining tongue enables the retaining tongue to be sufficiently stable so that it does not move in the second open position. ben. On the other hand, the holding tongue is sufficiently flexible that it can be moved in and out of the pouring opening with little effort when the lid is pivoted around the joint.

The invention is preferably characterized in that the retaining ring and the lid in the first open position enclose a first angle of inclination between 180 and 220 degrees and preferably between 190 and 210 degrees and that the retaining ring and the lid in the second open position have a second angle of inclination between 70 and 90 degrees and preferably between 75 and 95 degrees. In the two open positions, the cover can be fixed at angles of inclination which differ significantly from one another. This allows the hinged lid to be adapted to the current level of the container. This significantly simplifies the handling of the container, in particular when pouring out.

In a particularly preferred embodiment of the invention, the sealing element is a cover surface with a shoulder offset in the direction of the retaining ring. Due to the inwardly offset cover surface, the shoulder forms a stable sealing surface which remains stable in the event of a radial contact pressure from the inner wall of the container neck and forms a defined sealing surface. As a result, the pouring opening can be closed particularly tightly by the cover.

The sealing element can also be a sealing ring oriented in the direction of the retaining ring. This embodiment is suitable for applications which place less stringent requirements on the tightness of the container closure.

In a further particularly preferred embodiment of the invention, at least one driver element is formed on the cover in the direction of the retaining ring and is received in a corresponding recess provided on the retaining ring when the cover is in the closed position. The interaction of the driver element with the recess causes a reliable Verrehsi assurance of the cover against the retaining ring. As a result, the guarantee bars are reliably protected from being accidentally torn off during the initial rotating connection of the container closure to the container. The driver element expediently has a ramp shape and has a step side and an inclined side. This sawtooth-like configuration of the driver element has the effect that the anti-twist device acts in the direction of the first opening of the container closure. If twisted in the opposite direction, the guarantee bars break. In a preferred embodiment of the invention, the first extension is realized by a groove formed on the retaining ring, the second extension is realized by a vorsprin ing lid edge and the lid edge latches in the first Offenpositi on in the groove. The first and second extensions enable secure locking in the first open position. In addition, the extensions can be molded with little effort using the injection molding process and are easy to demold. It is preferred if the Hal tebänder are biased in the second open position. As a result, the cover can be held in the groove on the edge of the cover without wobbling, without the cover folding back from the first open position. In a further embodiment of the invention, the first extension has a gap with an indentation, the second extension has a transverse bar and the transverse bar engages in the indentation in the first open position. The crossbar comes to rest on the indentation when the first extension is locked in the second extension. Since the crossbar has to be pressed over the indentation when it is engaged and disengaged, the cover is kept particularly stable in the first open position in this embodiment.

In a preferred embodiment, the hinge is formed by a first and a second hinge band and the first extension is formed between the first and the second hinge band. The stability of the joint can thereby be improved and the retaining straps can be pretensioned in the first and / or in the second open position.

It proves to be expedient if at least one tearable guarantee web connects the upper edge with the lid before the first opening on the circumference of the upper edge of the retaining ring. This means that it can be seen immediately whether the container closure is originally closed or has already been opened.

In a further embodiment of the invention, the container closure can be pushed onto a container neck of the container. The container closure can therefore be connected to the bottle neck mechanically and accordingly quickly on a conveyor belt. Because the container closure is manufactured in one piece, the container closure can be mass-produced quickly and inexpensively in an injection mold. The container closure is advantageously made from polypropylene. As a result, the retaining tongue can be elastically deformed when it is pivoted from the second open position into the closed position.

In a particularly preferred embodiment of the invention, the retaining ring has slots distributed over the circumference with an upper edge and a lower edge, the upper edge being formed by an arcuate section of the retaining ring and the lower edge being formed by a wall section inclined inward in the radial direction and the lower edge of each slot forms projections, whereby engagement means are formed for a positive engagement with an annular projection on the outside of the container neck. Since the engaging means in the form of the inwardly inclined wall sections are not fully available on the retaining ring and there are also slots, the shape of which further reduces the use of material, the material requirement for plastic can be significantly reduced by up to 5%. In addition, the wall section cannot be moved inward in the radial direction, as a result of which the retaining ring is held on the annular projection and can only be pulled over it when the retaining ring is stretched along its circumference. The retaining ring is held so firmly on the annular projection by the wall sections that the predetermined breaking elements tear safely before the retaining of the wall sections is overcome. In the radial outward direction, however, the wall sections are flexible or movable. As a result, the wall sections can be removed from the injection mold or the injection molding tool with little effort. For the same reason, the application force for bouncing on the closure cap is significantly reduced compared to the prior art. An expansion of the guarantee ring, which can lead to permanent damage to the closure cap, is largely prevented during demoulding and bouncing. The wall sections therefore act in the manner of barbs.

Further advantages and features emerge from the following description of an exemplary embodiment of the invention with reference to the schematic representations. It shows in a representation that is not true to scale:

FIG. 1: a container closure in an open position in a side view; FIG. 2: the container closure from FIG. 1 in a sectional view along the plane of the drawing which runs through the axis of rotation;

FIG. 3: a side view of the container closure in a first open position;

FIG. 4: the container closure from FIG. 3 in a sectional view along the plane of the drawing which runs through the axis of rotation;

FIG. 5: a plan view of the container closure in the first open position;

FIG. 6: a perspective view of the container closure from FIG. 3; FIG. 7: a perspective view of the container closure in a further embodiment;

FIG. 8: a side view of the container closure in a second oven position and FIG

FIG. 9: the container closure from FIG. 8 in a sectional view along the plane of the drawing which runs through the axis of rotation;

FIG. 10: a further embodiment of the container closure in a side view;

FIG. 11: the embodiment from FIG. 8 in a sectional illustration; FIG. 12: a perspective view of the container closure from FIGS. 10 and 11 in a first open position;

FIG. 13: a perspective view of the container closure from FIGS. 10 and 11 in a second open position;

Figure 14: a detailed view of the retaining ring in a further embodiment and form

FIG. 15: a sectional view of the retaining ring from FIG. 14 with visualized angles of inclination.

FIGS. 1 to 13 show a container closure which is designated as a whole by the reference numeral 11 and which is used to close the pouring opening of a container. The closure cap 11 has a retaining ring 13 and a cover 15 which are connected to a joint 17. The hinge can be implemented by a first and a second hinge strap 17a, 17b. The hinge is preferably a film or tape hinge. The cover 15 can be pivoted about the hinge 17 from a closed position. The locking position is shown in FIGS. 1, 2, 10 and 11. In FIGS. 3 to 6 and 12, a first open position is shown, into which the cover can be pivoted. In the first open position, the retaining ring 13 and the cover 15 enclose a first angle of inclination 19 of approximately 200 degrees.

So that the cover 15 can be fixed in the first open position, a first extension 21 is formed on the retaining ring 13 and a second extension 23 is formed on the cover 15. In the first open position, the first and second extensions 21, 23 interlock. The retaining ring 13 has an upper edge 35 and a lower edge 36.

A sealing element 25 is formed on the inside of the cover 15. In FIGS. 1 to 9, the sealing element is designed as a sealing ring 25. In the closed position, the sealing ring 25 protrudes into the pouring opening 27 of a container 29. The container 29 comprises a container neck 30 on which the pouring opening 27 is provided. So that the outer surface of the sealing ring 25 and the inner surface of the pouring opening 27 interact, the sealing ring 25 can be conical. In this case, the sealing ring 25 is designed as a “cone sealer”. A press fit can also be provided between the sealing ring 25 and the pouring opening 27 in order to reliably seal the pouring opening 27.

As shown in FIGS. 1 to 5, in a first embodiment the first extension is implemented by a groove 21. The groove 21 is formed on the retaining ring 13 between the first and second hinge strips 17a, 17b. The second extension is a protruding cover edge 23. When the cover 15 is pivoted into the first open position, the cover edge 23 can be locked in the groove 21. The cover 15 is held in the first open position and can therefore not inadvertently protrude or fold into the pouring stream when liquid is poured out of the container 29.

In a second embodiment according to FIG. 7, the first extension forms a gap 22. The gap 22 is oriented in the direction of the axis of rotation 31. Furthermore, an indentation 32 is provided at the gap 22. The second extension 23 has a transverse bar 33. When the cover 15 is opened into the first open position, the second extension 23 is pressed into the gap 22. The transverse bar 33 latches in the gap 22 below the indentation 32, as a result of which the cover 15 is in the first open position is held. The opened cover 15 does not fall back involuntarily, son countries can only be moved from the first open position with the application of force.

Before the cover 15 is opened for the first time, a plurality of guarantee bars 37 connect the retaining ring 13 to the cover 15. The guarantee bars 37 are arranged on the circumference of the upper edge 35. When the cover 15 is pivoted for the first time, the guarantee bars are torn. The torn guarantee bars 37 indicate in the closed position whether the cover 15 has already been opened or not.

The cover 15 can also be pivoted into a second open position. A holding tongue 39 is formed on the sealing ring 25 so that the cover 15 is held in the second open position. The retaining tongue 39 is realized in that the sealing ring 25 is higher in the area of the joint 17 than on the rest of the circumference. The highest point of the holding tongue 39 should be referred to as holding tongue 41. It is preferred if the height increase on both sides of the tongue tip 41 is stepless, homogeneous and symmetrical. The length of the retaining tongue is defined by its opening angle 45 with the center point 43 of the cover. The opening angle is preferably 75 degrees.

In the second open position, the holding tongue 39 rests against the pouring opening 27, which prevents the lid 15 from being involuntarily closed. If the upper edge 35 of the retaining ring projects beyond the open edge 47 of the pouring opening 27, the retaining tongue 39 rests on the upper edge 35. In the second open position, the retaining ring 13 and the cover 15 enclose a second angle of inclination 49 of approximately 80 degrees. It is preferred if the first and the second hinge band 17a, 17b are pretensioned in the second open position, as a result of which the retaining tongue 39 is pulled to the open edge 47. This prevents the cover 15 from wobbling in the second open position. When the cover 15 is closed and opened, the retaining tongue 39 and / or the open edge 47 is elastically deformed. As a result, the sealing ring 25 can be completely received in the pouring opening 27 in the closed position.

In FIGS. 10 to 13, the sealing element is an inwardly offset cover surface 25. By this offset, the cover surface 25 forms a shoulder 51 at the transition to the rest of the cover 15. The cover surface 25 protrudes into the pouring opening 27, the shoulder 51 on the inner wall of the The pouring opening is in the closed position. The shoulder 51 is more stable than a sealing ring and can therefore be pressed against the inner wall in a more defined manner. This improves the sealing properties of the cover 15. The cover 15 has an outer ring 53 which is aligned with the retaining ring 13. The outer ring 53 is connected to the guarantee bars 37 with the retaining ring 13 a related party. In FIGS. 10, 12 and 13 it is shown that driver elements 55 are formed on the open edge of the outer ring 53. The driver elements 55 are particularly effective when they are arranged opposite the joint 17. With the slave elements 55 engage in depressions 57 or protrude into the depressions 57 which are provided on the retaining ring 13. This applies to the closed position and is shown in FIG. The recess 57 expediently has essentially the negative shape of the driver element 55. The driver element 55 preferably has a ramp shape or a sawtooth shape. It therefore has a step side 59 and an inclined side 61. This reliably prevents the cover 15 from rotating relative to the retaining ring 13, since the step side 59 strikes the recess 57 when a torque is applied. If the container closure 11 is attached to the container neck 30 for the first time after filling the container 29 by a rotary movement or bounced open by an axial movement, the catching elements 55 prevent the guarantee bars 37 from being unintentionally damaged by twisting or even torn off. The driver elements 55 expediently act in the direction of rotation in which the container closure 11 bounces open. It is owed to guarantees 37 that a gap 63 must be present between the outer ring 53 and the retaining ring 13 in the closed position. This gap 63 is also present between the driver elements 55 and the retaining ring 13. As a result, the opening of the cover 15 is not hindered by the driver elements 55.

The cover 15 of the closure cap 11 can be pivoted into a first and a second open position, wherein the cover 15 can snap into place in both open positions. This enables the consumer to choose individually between two open positions of the lid when pouring. If the container is almost full, it can be advantageous to choose the second open position, as the lid can serve as protection against spilling. If, on the other hand, the container is almost empty, it is advisable to select the first open position, since the container must be inclined more sharply to empty it. In the first open position, the lid 15 is less in the way when the container 29 is tilted to a greater extent than when it is in the second open position.

To hold the retaining ring 13 in the axial direction 13 projections 65 are formed on the inside of the Hal terings. The projections 65 can be designed in accordance with the description of the figures of FIGS. 14 and 15 that follow. This embodiment of the projections 65 is the content of the Swiss patent applications with the Application numbers 01467/19 and 01695/19, the priorities of which have been claimed and the content of which is hereby incorporated into the present patent application. Slits 67 are provided on the retaining ring, distributed over the circumference of the retaining ring 13. The slots 67 each have an upper edge 69 and a lower edge 71. The upper edge 69 is formed by a circular arc-shaped section from the retaining ring 13. The lower edge 71 corresponds to the free edge of a wall section 73 inclined inward in the radial direction. The lower edge 71 has a smaller radius than the retaining ring 13 due to the inner inclination of the wall section 73 and can therefore strike an abutment (annular projection 66) of the container neck 30 when the lid 15 is folded away from the guarantee ring 13. The abutment is realized by the annular projection 66, which is formed on the outside of the container neck 30. When the cover 15 is opened, the lower edge 71 engages the projection 66 in a form-fitting manner, as a result of which the retaining ring 13 is reliably held on the annular projection 66 even with high axial forces. As a result, the guarantee webs 37 reliably tear when the lid 15 is opened without the retaining ring 13 inadvertently detaching from the container neck.

Each wall section 71 has a first section 75 and two second Teilab sections 77 on. The first sub-section 75 represents an inwardly folded jacket section and is preferably flat. The second subsections 77 adjoin the inwardly facing sides of the first subsection 75 and connect this to the retaining ring 13. The second subsections 77 can be curved or flat and face one another at an incline inward. The lower edge 71 of the slot 67 corresponds to the free edges of the first section 75 and the second section 77 and lies in a plane 79, which is shown in FIG. The plane 79 is preferably oriented perpendicular to the axis of rotation 31 of the container neck 30. These design features of the wall section 73 described have the advantage that the wall section 73 can rest with the entire lower edge 71 on the annular projection 66 and does not yield in the manner of a barb when an axial tensile force is applied upwards. As a result, the retaining ring 13 is held permanently on the projection 66 or can only be removed from the projection 66 by destroying it. A movement of the first subsection 75 inward in the radial direction is prevented by providing the second subsections 77. However, a movement of the first partial section 75 outward in the radial direction is possible. This movement is flexible and the wall section 73 returns to its inwardly inclined basic position after it has been pressed radially outward. This has the Another advantage that the retaining ring 13 can be easily removed from the mold and can be bounced onto the container neck 30 together with the threaded part 15 with little force. Demolding from an injection mold and bouncing onto the container neck 30 can take place due to the flexibility of the wall section 73 without the risk of the wall section 73 being damaged. Opening the cover 15 for the first time causes an asymmetrical load on the retaining ring 13. As a result, the retaining ring 13 is pulled upwards with great force at the point at which the cover 15 is pressed open until the guarantee webs 37 tear. The new type of holder for the holder ring 13 represents an advantageous addition to the present container closure 11, since detachment of the holder ring 13 from the container neck 30 is reliably prevented.

It is preferred if the inclined wall sections 73 have a wall thickness that is reduced compared to the retaining ring 13. In FIG. 15 it is shown that the area of the lower edge 71 has the smallest wall thickness. As a result, the flexibility of the wall section 73 described above is further improved radially outward. The wall thickness of the wall section 73 increases linearly starting from the lower edge 71 downwards.

In FIGS. 14 and 15, the retaining ring 13 is shown without the cover 15. In Figures 14 and 15 it can be clearly seen that an annular bead 81 is formed above the slots 67 on the retaining ring 13, on which the upper edges 69 lie. In FIG. 15, a first and a second angle of inclination 83.85 are shown. The first angle of inclination 83 indicates the inclination of the first subsection 75 with respect to the plane of the lower edge 71. The first angle of inclination 83 has a size between 60 and 80 degrees and preferably between 65 and 75 degrees. The larger the first angle of inclination 83, the better the stability of the wall sections 73 against vertical forces or axial tensile forces caused by the opening of the cover 15. The first angle of inclination 83 must not become too large, otherwise the annular projection 66 cannot be reached under sufficiently.

The second angle of inclination 85 indicates the inclination of the slot 67 with respect to the plane of the lower edge 81. The connecting straight line 87, which represents the inclination of the slot 67, is a connection of the upper edge 69 with the lower edge 71 in a plane which is spanned by the axis of rotation 31 and the connecting straight line 87. The second angle of inclination 85 is enclosed by the connecting straight line 87 and the plane 79. The second angle of inclination 85 has a size between 30 and 50 degrees and preferably between 35 and 45 degrees. The greater the second angle of inclination 85, the easier it is for the retaining ring 13 to be removed from the mold.

Legend:

11 Container lock

13 retaining ring

15 lids

17, 17a, 17b hinge, first hinge band, second hinge band 19 first angle of inclination 21 first extension, groove 22 gap 23 second extension, lid edge 25 sealing element, sealing ring, lid surface 27 pouring opening

29 containers

30 container neck

31 axis of rotation

32 indentation

33 crossbeams

35 Upper edge of the retaining ring

36 Lower edge of the retaining ring

37 Guarantee bars 39 Retaining tongue 41 Tongue tip 43 Center of the lid 45 Opening angle 47 Open edge of the pouring opening 49 Second angle of inclination 51 Shoulder 53 Outer ring 55 Driver elements 57 Recesses 59 Step side 61 Inclined side 63 Gap 65 Projections Annular projection

Slots

Top edge

Lower edge

Wall section

First part

Second sections

level

Ring bulge

First angle of inclination Second angle of inclination connecting straight line

Claims

Having container closure (11) made of plastic

- A retaining ring (13) for fastening the closure (11) to a container (29) with an upper and lower edge (35,36),

- A cover (15) connected to the retaining ring (13),

- A joint (17) which connects the lid (15) to the retaining ring (13) and around which the lid (15) can be pivoted relative to the retaining ring (13) from a closed position into a first open position and vice versa,

- A sealing element (25) which is formed on the inside of the lid (15) and can seal a pouring opening (27) of the container (29) in the closed position,

- A first extension (21) which is formed on the retaining ring (13), and

- A second extension (23) which is formed on the cover (15), the first and the second extension (21, 23) interlocking in the first open position and thereby the cover (15) being locked in the first open position , characterized in that the sealing element (25) has a height and forms a retaining tongue (39) in that the height of the sealing element (25) in the area of the joint (17) is higher than on the rest of the circumference of the sealing element (25), and that the lid (15) can be pivoted into a second open position in which the retaining tongue (39) can rest against the open edge (47) of the pouring opening (27) or the upper edge (35) of the retaining ring (13).

Container closure according to claim 1, characterized in that the holding tongue (39) has a tongue tip (41) which corresponds to the highest point of the sealing ring (25).

Container closure according to claim 2, characterized in that the height increase on both sides of the tongue tip (41) is stepless.

Container closure according to one of the preceding claims, characterized in that the holding tongue (39) has a length along the circumference of the sealing ring (25) which is defined in that the holding tongue (39) with the center point (43) of the lid (15 ) includes an opening angle (45), which is between 90 and 40 degrees, preferably between 80 and 50 degrees and particularly preferably between 70 and 60 degrees.

5. Container closure according to one of the preceding claims, characterized in that the retaining ring (13) and the lid (15) in the first open position have a first angle of inclination (19) between 180 and 220 degrees and preferably between 190 and 210 degrees include and that the retaining ring (13) and the cover (15) in the second open position include a second angle of inclination (49) between 70 and 90 degrees and preferably between 75 and 95 degrees sen.

6. Container closure according to one of the preceding claims, characterized in that the sealing element is a ver in the direction of the retaining ring (13) set cover surface (25) with a shoulder (51).

7. Container closure according to one of claims 1 to 5, characterized in that the sealing element is a sealing ring (25) oriented in the direction of the retaining ring (13).

8. Container closure according to one of the preceding claims, characterized in that at least one driver element (55) is formed on the cover (15) in the direction of the retaining ring (13), which in a corresponding recess provided on the retaining ring (13) ( 57) is included when the cover (15) is in the closed position.

9. Container closure according to claim 8, characterized in that the slave element with (55) has a ramp shape and a step side (59) and an inclined side (61).

10. Container closure according to one of the preceding claims, characterized in that the first extension is formed by one on the retaining ring (13)

Groove (21) is realized, the second extension is realized by a protruding lid edge (23) and the lid edge (23) latches in the first open position in the groove (21).

11. Container closure according to one of claims 1 to 9, characterized in that the first extension has a gap (22) with an indentation (32) which second extension (23) has a transverse bar (33) and the transverse bar (33) engages in the indentation (32) in the first open position.

12. Container closure according to one of the preceding claims, characterized in that the hinge (17) is formed by a first and a second hinge band (17a, 17b) and the first extension (21) between the first and the second hinge band ( 17a, 17b) is formed.

13. Container closure according to one of the preceding claims, characterized in that before the first opening on the circumference of the upper edge (35) of the retaining ring (13) at least one tearable guarantee web (37) the upper edge (35) with the lid (15) connects.

14. Container closure according to one of the preceding claims, characterized in that the container closure (11) can be bounced onto a container neck (30) of the container (29).

15. Container closure according to one of the preceding claims, characterized in that the container closure (11) is made in one piece.

16. Container closure according to one of the preceding claims, characterized in that the container closure (11) is made of polypropylene.

17. Container closure according to one of the preceding claims, characterized in that the retaining ring (13) distributed over the circumference arranged slots (67) with an upper edge (69) and a lower edge (71), wherein the upper edge (69) by a circular arc-shaped section of the retaining ring (13) is formed and the lower edge (71) is formed by a radially inwardly inclined wall section (73) and that the lower edge (71) of each slot (67) forms projections (65) , whereby engagement means for a positive engagement with an on the outside of the Behäl terhalses (30) annular projection (66) are formed.