Closure assembly for a beverage container and method for repeatably closing

Description

[0001] The present invention relates to a closure arrangement for a beverage container, in particular a beverage can. The present invention further relates to a method for repeatedly closing an opening of a beverage container with a closure arrangement, in particular with the described closure arrangement. The closure arrangement comprises at least one lid element with an opening and a closure element permanently attached to the lid element for repeatedly, and in particular gas-tightly, closing the opening. The lid element is in particular made of metal. The beverage container serves to store a contents, e.g., a fluid, wherein the beverage container is under pressure when closed.

[0002] Especially with beverage cans containing carbonated liquid, the beverage container can be under an internal pressure of up to 6.2 bar before being opened for the first time.

[0003] Both single-use and resealable closure devices are known for sealing such beverage containers. The advantage of resealable closure devices is obvious. With them, a beverage container can be sealed even after partial emptying, particularly in a gas-tight manner, thus preventing the escape of the fluid stored in the container and, especially in the case of carbonated contents, the escape of carbonation. Known resealable closure devices often feature complex components or complex methods for opening and closing the closure.

[0004] In particular, a captive arrangement of the closure on the lid element or on the beverage container is desired, so that all components of the beverage container can be recycled.

[0005] US patent 2012 / 248113 A1 discloses a resealable closure for a beverage can. In this design, a lever, supported by the can lid, pivots and pushes a flap into the beverage container. To fix the closure in an open position, the lever must then be at least partially positioned inside the beverage container.

[0006] US 2020 / 0031542 A1 is directed at a closure for a container.

[0007] The object of the invention is to at least partially solve the problems existing with reference to the prior art and in particular to provide a closure arrangement for a beverage container by which the beverage container can be repeatedly and in particular gas-tightly resealed.

[0008] In particular, a locking element of the locking assembly should be permanently attached or secured to the beverage container.

[0009] Furthermore, the closure arrangement should also allow the beverage container to be resealed after initial opening, ensuring a tightness of the beverage container (against atmospheric pressure) both at low pressure in the beverage container and at pressures inside the beverage container of up to 6.2 bar.

[0010] Furthermore, there is a desire to specify the simplest possible method for repeatedly closing the opening of a beverage container with a closure assembly.

[0011] These problems are solved by a locking arrangement according to the features of claim 1, by a use according to the features of claim 19, and by a method according to the features of claim 20. Further advantageous embodiments of the locking arrangements and the method are specified in the dependent claims. It should be noted that the features listed individually in the dependent claims can be combined in a technologically meaningful way and define further embodiments of the invention. Furthermore, the features specified in the claims are specified and explained in more detail in the description, which also presents further preferred embodiments of the invention.

[0012] This is achieved through a closure device for a beverage container. The closure device comprises at least one lid element with an opening and a closure element arranged on the lid element for repeatedly closing the opening. The lid element has an outer and an inner surface, and the opening has an opening rim and an opening plane formed by the opening rim. The closure element comprises at least one base part, a tab, and a lever element. The base part has a frame part arranged at the opening rim, which has a window, and a flap pivotably connected to the frame part for closing the window and thus the opening. The tab is pivotably connected to the frame part only via a first axis of rotation. The lever element is connected to the tab only via a second axis of rotation and to the flap only via a third axis of rotation.

[0013] In particular, the lid element is a known lid, e.g., of a beverage can, which is connected or connectable to the beverage can. Preferably, the lid element is permanently (only destructively) connected to the beverage container. In particular, the lid element consists of a metal or an alloy.

[0014] The inside of the lid element forms the side of the lid element facing the contents of the beverage container, while the outside of the lid element forms the side of the lid element facing away from the contents.

[0015] The opening of the lid element is, in particular, also the (only) pouring opening for the contents of the beverage container. The shape of the opening is not specified. The opening is not rotationally symmetrical. However, a rotationally symmetrical opening can also be closed using the closure element described here and is therefore encompassed by the term "opening."

[0016] A new condition of the locking element refers in particular to the state of the locking element before initial actuation, i.e. pivoting, of the tab.

[0017] When new, the tab is in its initial position, i.e., in an unpivoted state. When the tab is in this unpivoted initial position, the flap is also not pivoted, and therefore the window or opening is closed.

[0018] The flap is pivotable, in particular between its unpivoted starting position and a pivoted end position, especially a maximally pivoted one. In the end position of the flap, the flap is pivoted, in particular to its maximum extent, and the window or opening is fully open.

[0019] In the initial position, the contents of the beverage container are sealed, particularly gas-tight, from the environment of the beverage container, especially from a pressure inside the beverage container of at least 3 bar, preferably at least 5 bar, and particularly preferably at least 6.2 bar. However, a seal is also present if the pressure inside the beverage container corresponds to the pressure of the environment.

[0020] The locking element is designed as a single piece, meaning that the individual components – base, tab, and lever element – ​​are captive connected to one another (via the pivot axes, and in particular only via the pivot axes). These components can be manufactured independently of one another and connected to each other during an assembly process.

[0021] In particular, the first axis of rotation and the second axis of rotation are parallel to each other and spaced apart from each other.

[0022] In particular, the frame part is fixed and immovably arranged at the edge of the opening. The lever element, the flap, and the tab are connected to the cover element via the frame part. The lever element, flap, and tab are movable relative to the frame part.

[0023] In particular, the third axis of rotation is also arranged parallel to the other axes of rotation.

[0024] When the tab pivots, it rotates around the first axis of rotation, particularly relative to the frame part. Due to the distance between the first and second axes of rotation, the second axis of rotation—the connection between the lever element and the tab—also rotates around the first axis of rotation during this initial pivoting motion.

[0025] According to the invention, the third axis of rotation is arranged at a distance from the second axis of rotation, and optionally also at a distance from the first axis of rotation. Due to the rotation of the second axis of rotation about the first axis of rotation, the position of the third axis of rotation relative to the first axis of rotation changes. The distance between the second axis of rotation and the third axis of rotation is, in particular, constant or is defined by the lever element on which these two axes of rotation are arranged.

[0026] In particular, the tab, starting from an unpivoted initial position, can be pivoted about the first axis of rotation in a first pivoting motion, and as a result of this first pivoting motion, the flap can be pivoted relative to the frame part. The movement of the first pivoting motion is coupled to the movement of the flap, e.g., a second pivoting motion, via the lever element.

[0027] In particular, the tab, the base part, and the lever element interact like a toggle lever, such that a first pivoting of the tab about the first axis of rotation by a first angular amount causes a second pivoting of the flap relative to the opening plane, and a further first pivoting of the tab by another first angular amount causes a third pivoting of the flap. The second and third pivoting angular amounts are of different magnitudes.

[0028] In particular, the flap is connected to the frame part (only) via a fourth axis of rotation, possibly also via a hinge. With a hinge, in addition to rotational movement, translational movement of the flap relative to the frame part is also possible, e.g., with a film hinge. In a film hinge, the flap and frame part are connected to each other via an elastically deformable section.

[0029] If the flap is connected to the frame part via a fourth pivot axis, meaning that only a rotational movement of the flap relative to the frame part around the axis is possible, the effect of a toggle lever is obviously comprehensible based on the different angular magnitudes of the second pivot and the third pivot.

[0030] In a toggle lever, as in any lever, a large stroke with low pulling or pushing force is converted into a small stroke with high force, or vice versa, according to the lever principle. The special feature of a toggle lever lies in the fact that the transmission ratio between applied force and resulting force, or between primary and secondary stroke, changes continuously during the movement.

[0031] It is specifically proposed here that, starting from the initial position, a first pivoting of the tab initially causes only a slight second pivoting of the flap, or that this second pivoting only begins after a minimum amount of the first pivoting has been reached. As the tab is pivoted further, i.e., towards its end position, the flap pivots increasingly strongly.

[0032] With a constant rotational speed of the tab around the first axis of rotation, the rotational speed of the flap, e.g., around the fourth axis of rotation, changes. Specifically, initially, starting from the initial position, the rotational speed of the flap is very low, while with increasing initial pivoting of the tab, the rotational speed of the flap increases.

[0033] Inversely to the rotational speeds, or the speeds of the respective pivoting movements, the acting forces and torques also change. In particular, at the very low rotational speed of the flap, a very large torque can be transmitted to the flap, so that especially in the initial position, when the flap rests against the frame part to close the window, a large torque is present to seal the connection between the flap and the frame part or to open the flap, i.e., to perform the second pivoting movement.

[0034] In particular, starting from an unpivoted initial position, the first pivoting of the tab by at least 45 degrees, preferably by at least 50 degrees, and most preferably by at least 55 degrees, causes the second pivoting by at most 5 degrees, preferably by at most 3 degrees, and most preferably by at most 2.5 degrees. In particular, therefore, starting from an unpivoted initial position, the first pivoting of the tab by at least 55 degrees causes the second pivoting by at most 2.5 degrees.

[0035] In particular, starting from the unpivoted initial position, the first pivoting of the tab by a maximum of 150 degrees, preferably by a maximum of 160 degrees, and most preferably by a maximum of 165 degrees, causes the second pivoting of at least 30 degrees, preferably by at least 32 degrees, and most preferably by at least 34 degrees. In particular, for example, starting from the unpivoted initial position, the first pivoting of the tab by a maximum of 150 degrees causes the second pivoting of at least 34 degrees. In particular, starting from the unpivoted initial position, the first pivoting of the tab by between 150 and 180 degrees causes the second pivoting of at least 30 to 50 degrees.

[0036] In particular, the flap is connected to the frame part via a hinge.

[0037] In particular, the frame component is permanently attached to the opening edge. Specifically, the frame component is attached to the opening edge via a positive-locking connection and can only be detached from the opening edge by destroying the frame component. Specifically, the frame component is mounted to the opening edge by plastic deformation. This plastic deformation can be achieved, for example, by thermal treatment of the frame component, such as at least local heating.

[0038] In particular, the sealing element enables repeatable, gas-tight sealing of the opening. Specifically, the sealing element allows not only for closing or liquid-tight sealing, but also for gas-tight sealing of the opening. This ensures effective sealing of the opening, even after the sealing element has been opened for the first time, especially with carbonated liquids.

[0039] In particular, a first seal is arranged around the opening between the inner side and a contact surface of the frame part. Specifically, the contact surface is oriented at least partially parallel to a partial surface of the inner side of the cover element. The first seal is located in the area of ​​this partial surface. Specifically, the first seal is attached to the frame part and is positioned on this partial surface during the assembly of the frame part to the cover element. Specifically, the first seal can be manufactured, or is manufactured, together with the frame part, and optionally also with the flap, using a two-component injection molding process.

[0040] In particular, a second seal is arranged between the frame and the flap, running around the entire window. This second seal enables the window or opening to be sealed by means of a sealing connection between the flap and the frame. Specifically, the second seal is located on the frame or on the flap. Specifically, the second seal can be manufactured, or is manufactured, together with the frame and, if applicable, also with the flap using a two-component injection molding process.

[0041] In particular, the frame part and / or the flap and / or the tab and / or the lever element is made of a plastic with a modulus of elasticity of at least 1100 MPa [Megapascal], in particular of at least 1300 MPa, preferably of at least 1600 MPa.

[0042] Preferably, the first seal and / or the second seal is made of a plastic with a Shore A hardness of at most 60, in particular of at most 45, preferably of at most 35.

[0043] In particular, the tab is only connected to the base part via a sealing element in its unpivoted starting position. Specifically, the connection via the sealing element is destroyed upon the first pivoting of the tab. The sealing element serves to indicate the status of the closure element or the beverage container. An undamaged sealing element indicates that the closure element has not yet been activated, i.e., the beverage container has not been opened. Conversely, a damaged sealing element indicates that the closure element has been activated at least once, i.e., the beverage container has been opened at least once.

[0044] In particular, the base part has a venting element, wherein a fluid connection between the inner and outer surfaces is formed upon a first pivoting of the tab by the venting element; wherein the first pivoting of the tab causes a deformation of the venting element. In particular, the venting element is arranged on the frame part or on the flap. In particular, the venting element is integrally connected to the base part. In particular, the venting element can be manufactured or has been manufactured together with the frame part and / or the flap using a two-component injection molding process.

[0045] In particular, the venting element is tubular and enables a fluid connection between the interior of the beverage container and its surroundings. Specifically, the venting element allows for venting, i.e., pressure equalization between the interior of the beverage container and its surroundings. The venting element has a minimum opening cross-section of 1 to 4 mm² along its tubular shape, preferably a constant cross-section. This minimum opening cross-section is reduced to at least locally to zero when the venting element is deformed, so that when the tab is in its initial position, the fluid connection is blocked, preventing venting through the venting element.

[0046] The venting element can alternatively be designed, e.g. rigidly, in such a way that the tab closes the minimum opening cross-section via a closing element of the tab, by arranging the closing element in the minimum opening cross-section.

[0047] In particular, in the unpivoted initial position of the flap, the flap forms a fluid-tight connection with the frame part, whereby the fluid-tight connection can be broken by a second pivoting of the flap upon a first pivoting of the flap. A fluid-technical connection between the inside and outside is achieved exclusively through the breaking of the fluid-tight connection.

[0048] In particular, the maximum force required to pivot the tab on commercial beverage can lids is, on average, approximately 21 N [Newtons]. This is the force measured on standard, fully automatic opening force measuring devices in beverage can lid production facilities. It is also the maximum force that the end user / consumer must apply to open the can.

[0049] In particular, the force required to pivot the tab is at most 20 N, preferably at most 15 N, and most preferably at most 10 N.

[0050] In particular, significantly lower forces (especially forces reduced by more than 20%) are required to pivot the tab compared to conventional locking elements, since no material separation is necessary here; instead, fluid-tight connections are only broken by moving the moving parts relative to each other. Conventional locking elements, on the other hand, do involve material separation, such as the separation of plastic or metal materials, which requires a high force or torque.

[0051] In the proposed locking element, for example, only the flap is pivoted from the frame section to expose the window or opening. Before pivoting, the flap is vented via a ventilation element, so that it does not have to move against any internal pressure that may be present in the beverage container. However, pivoting the flap is also possible without a ventilation element at low torques because, due to the implemented toggle lever principle, a small torque at the tab is translated into a high torque at the flap.

[0052] In particular, the tab assumes a self-locking position, at least in an unpivoted starting position or in the range of a maximally pivoted end position. This range specifically encompasses an angular range of at most 10 degrees around the maximally pivoted end position. This self-locking position is particularly stable, meaning that a torque is required to move the tab out of this position. This self-locking position is present only in the range of the maximally pivoted end position. The tab is held in its starting position, particularly after the initial actuation or pivoting of the tab, by an elastic deformation of another component of the locking element. The elastic deformation of this other component enables the formation of a positive or frictional connection that prevents further pivoting of the tab.This positive or force-fit connection can be released, in particular, by actuating the tab.

[0053] Force-fit connections require a normal force on the surfaces to be joined. Their mutual displacement is prevented as long as the opposing force caused by static friction is not exceeded.

[0054] Connections are described as positive-locking connections when the connecting partners are held together by a geometric arrangement. Positive-locking connections are created by the interlocking of at least two connecting partners. This prevents the connecting partners from coming apart, even without or with an interrupted force transmission. In other words, in a positive-locking connection, one connecting partner obstructs the other.

[0055] In particular, the tab is protected from the environment by a protective flap in an unpivoted starting position.

[0056] In particular, the protective flap is pivotably connected to the tab (only) via a fifth axis of rotation. Specifically, the fifth axis of rotation is arranged at least parallel to the first, second, and third axes of rotation.

[0057] In particular, the fifth axis of rotation is spaced apart from each of the first, second and third axes of rotation.

[0058] In particular, the protective flap is pivoted in a first direction around the fifth axis of rotation to actuate the latch and open the flap. Specifically, the latch is pivoted in a second direction around the first axis of rotation (i.e., relative to the frame part), so that the flap is then actuated via the lever element. In particular, the protective flap is supported, at least temporarily, by the locking mechanism.

[0059] In particular, the protective flap covers the opening and / or the window, thus enabling at least parts of the locking element to be protected from the environment.

[0060] In particular, the protective flap has a sealing element by which the protective flap is connected (only) before the first actuation of the locking element to another part of the locking element, e.g., to the frame part, preferably by a material bond. The initial movement of the protective flap destroys the sealing element, so that it is easily recognizable to a user that the beverage container has been opened at least once.

[0061] The use of the closure arrangement described above for the repeatable, fluid-tight sealing (and opening) of a beverage can is proposed.

[0062] A further locking element, particularly for the locking arrangement described above, is proposed. The locking element comprises at least a base part, a tab, and a lever element. The base part includes a frame part arranged at the edge of the opening, which has a window, and a flap pivotably connected to the frame part to close the window and thus the opening. The tab is pivotably connected to the frame part via (only) a first axis of rotation. The lever element is connected to the tab via (only) a second axis of rotation and to the flap via (only) a third axis of rotation.

[0063] In particular, the base part is a one-piece injection-molded part formed from at least two materials, namely one material for the at least one seal and / or the venting element and another material for at least one of the frame part and flap.

[0064] In particular, the locking element comprises three injection-molded parts: a base part, a lever element, and a tab, which are assembled to form the locking element. These components are captive connected to one another (via the axes of rotation, and in particular only via the axes of rotation).

[0065] A method for repeatedly closing the opening of a beverage container with a closure arrangement, in particular with the described closure arrangement, is further proposed. The closure arrangement comprises at least one lid element of the beverage container with an opening and a closure element arranged on the lid element for repeatedly closing the opening. The lid element has an outer and an inner surface, and the opening has an opening rim and an opening plane formed by the opening rim. The closure element comprises at least a base part, a tab, and a lever element. The base part has a frame part arranged at the opening rim, which has a window, and a flap pivotably connected to the frame part for closing the window and thus the opening. The tab is pivotably connected to the frame part (only) via a first axis of rotation.The lever element is connected to the tab (only) via a second pivot axis and to the flap (only) via a third pivot axis.

[0066] Starting from an unpivoted initial position of the tab, in which the window is closed by the flap, the procedure comprises at least the following steps: a) Pivoting the tab about the first axis of rotation by a first angular amount in a first pivot, whereby the flap is pivoted by a second pivot relative to the opening plane; b) Further first pivoting of the tab by a further first angular amount, whereby the flap is pivoted by a third pivot relative to the opening plane; where the second pivot and the third pivot are of different sizes.

[0067] In particular, the flap can be pivoted, preferably from its initial position, by a first angular amount within a first pivoting movement, whereby the flap is moved by an angular amount of zero degrees, i.e., not yet pivoted. The first angular amount is in particular at least 5 degrees, preferably at least 15 degrees, and most preferably at least 25 degrees.

[0068] In particular, the tab, the base part and the lever element work together in the manner of a toggle lever, such that a first pivoting of the tab about the first axis of rotation by a first angular amount causes a second pivoting of the flap relative to the opening plane and a further first pivoting of the tab by another first angular amount causes a third pivoting of the flap.

[0069] In particular, the base part features a venting element, whereby, upon initial pivoting of the tab from its unpivoted starting position, a fluid connection is formed between the inside and outside via the venting element, thus equalizing the pressure of the beverage container with its surroundings. This initial pivoting of the tab causes the venting element to deform.

[0070] In particular, the flap, in its unpivoted initial position, forms a fluid-tight connection with the frame part. Upon first pivoting the flap, this fluid-tight connection is broken by the second pivoting of the flap. Pressure equalization between the contents of the beverage container and the surrounding environment is achieved solely through the breaking of the fluid-tight connection (between the flap and the frame part).

[0071] The statements regarding the closure arrangement apply equally to the closure element, the use of the closure arrangement and the closure element, and to the procedure, and vice versa.

[0072] The use of indefinite articles ("a", "an", "a" and "one"), particularly in the patent claims and the description reproducing them, is to be understood as such and not as a numeral. Accordingly, terms or components introduced by these articles are to be understood as occurring at least once and, in particular, may also occur multiple times.

[0073] It should be noted as a precaution that the numerical terms used here ("first", "second", etc.) primarily serve (only) to distinguish between several similar objects, quantities, or processes, and thus do not necessarily dictate any dependency and / or sequence between these objects, quantities, or processes. Should a dependency and / or sequence be required, this is explicitly stated here, or it will be obvious to a person skilled in the art upon studying the specific configuration described. Where a component can occur multiple times ("at least one"), the description of one of these components may apply equally to all or some of the multiple components, but this is not mandatory.

[0074] The invention and its technical context are explained in more detail below with reference to the accompanying figures. It should be noted that the invention is not intended to be limited by the exemplary embodiments shown. In particular, unless explicitly stated otherwise, it is also possible to extract partial aspects of the situations described in the figures and combine them with other components and findings from the present description. It should be emphasized that the figures, and especially the depicted dimensions, are only schematic. They show: Fig. 1: A cover element in a perspective view; Fig. 2: A closure element in an exploded view in a perspective view; Fig. 3: A closure assembly in a side view in section; Fig. 4: A base part of the closure element according to Fig. 3 ; Fig. 5: the closure arrangement according to Fig. 3in a perspective view, with the tab in a starting position; Fig. 6: the locking arrangement according to Fig. 5 in a perspective view in section; Fig. 7: the closure arrangement according to Fig. 3 in a perspective view, with the tab in a pivoted position; Fig. 8: the locking arrangement according to Fig. 7 in a perspective view in section; Fig. 9: the closure arrangement according to Fig. 3 in a perspective view, with the tab in an end position; Fig. 10: the locking arrangement according to Fig. 9 in a perspective view in section; Fig. 11: the closure arrangement according to Fig. 3 in a side view in section, with the flap closing the window; Fig. 12: the closing arrangement according to Fig. 11 in a side view in section, wherein the pivoting of the flap is 1 degree; Fig. 13: the locking arrangement according to Figs. 11 and 12in a side view in section, with the pivoting of the flap being 10 degrees; Fig. 14: the locking arrangement according to Figs. 11 to 13 in a side view in section, with the pivoting of the flap being 20 degrees; Fig. 15: the locking arrangement according to Figs. 11 to 14 in a side view in section, with the pivoting angle of the flap being 30 degrees; Fig. 16: the locking arrangement according to Figs. 11 to 15 in a side view in section, with the tab arranged in the end position; Fig. 17: a locking arrangement in a side view in section; with the tab in a starting position; Fig. 18: the locking arrangement according to Fig. 17 in a side view in section, with the tab in a pivoted position; Fig. 19: another locking element in an exploded view in a perspective view; Fig. 20: a locking arrangement with a locking element according to Fig. 19in a perspective view in section; Fig. 21: the further closure arrangement according to Fig. 20 in a perspective view in section; Fig. 22: a locking arrangement with a protective flap in a side view in section; Fig. 23: the locking arrangement according to Fig. 22 , with the protective flap in a pivoted position; Fig. 24: the locking arrangement according to Figs. 22 and 23 with the tab in a final position.

[0075] Fig. 1Figure 1 shows a lid element 3 in a perspective view. The lid element 3 has an outer surface 6 and an inner surface 7, as well as an opening 4. The opening 4 has an opening rim 8 and an opening plane 9 formed by the opening rim 8. The lid element 3 is connected to, or can be connected to, the beverage container 2. The lid element 3 is permanently (only destructively) connected to the beverage container 2. The inner surface 7 of the lid element 3 forms the side of the lid element 3 facing the contents of the beverage container 2, while the outer surface 6 of the lid element 3 forms the side of the lid element 3 facing away from the contents and towards its surroundings 31. The opening 4 of the lid element 3 is the only pouring opening for the contents of the beverage container 2.

[0076] Fig. 2 shows a closure element 5 in an exploded view in a perspective view. Fig. 3shows a closure arrangement 1 in a side view in section. Fig. 4 shows a base part 10 of the locking element 5. Fig. 3 . The Figs. 2 to 4 will be described together below. The explanations regarding... Fig. 1 will be referred.

[0077] The closure assembly 1 comprises a cover element 3 with an opening 4 and a closure element 5 arranged on the cover element 3 for repeatedly closing the opening 4. The cover element 3 has an outer surface 6 and an inner surface 7, and the opening 4 has an opening edge 8 and an opening plane 9 formed by the opening edge 8. The closure element 5 comprises a base part 10, a tab 11, and a lever element 12. The base part 10 has a frame part 13 arranged on the opening edge 8, which has a window 14, and a flap 15 pivotably connected to the frame part 13 for closing the window 14 and thus the opening 4. The tab 11 is pivotably connected to the frame part 13 via a first pivot axis 16. The lever element 12 is connected to the tab 11 via a second pivot axis 17 and to the flap 15 via a third pivot axis 18.

[0078] A in Fig. 3The depicted new state of the locking element 5 refers to the state of the locking element 5 before initial actuation, i.e. pivoting, of the tab 11.

[0079] In its new state, the tab 11 is in a starting position 20, i.e., in an unpivoted state. When the tab 11 is in the unpivoted starting position 20, the flap 15 is also not pivoted, and thus the window 14 or the opening 4 is closed.

[0080] The tab 11 is located between the unpivoted starting position 20 and a maximally pivoted end position 32 (see Fig. 9 and 10 ) pivotable. In the end position 32 of the tab 11, the flap 15 is pivoted to its maximum extent and the window 14 or the opening 4 is fully open.

[0081] In the initial position 20, the contents of the beverage container 2 are sealed gas-tight against the environment 31 of the beverage container 2.

[0082] The locking element 5 is a single piece, meaning that the individual components base part 10, tab 11 and lever element 12 are captive connected to each other. According to Fig. 2 It is evident that these components can be manufactured independently of each other and connected to each other during an assembly process.

[0083] The first axis of rotation 16 and the second axis of rotation 17 are parallel to each other and arranged at a distance 19 from each other.

[0084] The frame part 13 is fixed and immovably arranged at the opening edge 8. The lever element 12, the flap 15, and the tab 11 are connected to the cover element 3 via the frame part 13. The lever element 12, flap 15, and tab 11 are movably arranged relative to the frame part 13.

[0085] The third axis of rotation 18 is also arranged parallel to the other axes of rotation 16, 17.

[0086] When the tab 11 pivots, it rotates relative to the frame part 13 about the first axis of rotation 16. Due to the distance 19 between the first axis of rotation 16 and the second axis of rotation 17, the second axis of rotation 17, i.e., the connection between the lever element 12 and the tab 11, also rotates about the first axis of rotation 16 during this first pivoting movement 21.

[0087] The third axis of rotation 18 is spaced apart from the second axis of rotation 17 and also from the first axis of rotation 16. Due to the rotation of the second axis of rotation 17 around the first axis of rotation 16, the position of the third axis of rotation 18 changes relative to the first axis of rotation 16. The distance between the second axis of rotation 17 and the third axis of rotation 18 is constant or is defined by the lever element 12 on which these two axes of rotation 17 and 18 are arranged.

[0088] Starting from an unpivoted initial position 20, the tab 11 can be pivoted in a first pivot 21 about the first axis of rotation 16, and as a result of this first pivot 21, the flap 15 can be pivoted relative to the frame part 13. The movement of the first pivot 21 is coupled to a second pivot 23 of the flap 15 via the lever element 12.

[0089] The tab 11, the base part 10, and the lever element 12 interact like a toggle lever, such that a first pivoting 21 of the tab 11 about the first axis of rotation 16 by a first angular amount 22 causes a second pivoting 23 of the flap 15 relative to the opening plane 9, and a further first pivoting 21 of the tab 11 by another first angular amount 22 causes a third pivoting 24 of the flap 15. The second pivoting 23 and the third pivoting 24 are of different magnitudes (see Figs. 7 to 10 and 11 to 16 ).

[0090] The flap 15 is connected to the frame part 13 via a fourth pivot axis 33. The fourth pivot axis 33 is fixedly arranged between the frame part 13 and the flap 15. The flap 15 can also be connected to the frame part 13 via a hinge 25, in which case the flap 15 could perform a translational movement relative to the frame part 13 in addition to its rotational movement (not shown here).

[0091] Starting from the initial position 20, a first pivoting movement 21 of the tab 11 initially causes only a slight second pivoting movement 23 of the flap 15, or rather, this second pivoting movement 23 only begins after a minimum amount of the first pivoting movement 21 has been reached. If the tab 11 is increasingly pivoted, i.e., towards the end position 32 of the tab 11, the flap 15 is increasingly pivoted.

[0092] With a constant rotational speed of the tab 11 about the first axis of rotation 16, the rotational speed of the flap 15 about the fourth axis of rotation 33 changes. Initially, starting from the initial position 20, the rotational speed of the flap 15 is very low, while with increasing first pivoting 21 of the tab 11, the rotational speed of the flap 15 increases.

[0093] Inversely to the rotational speeds, or the speeds of the respective pivoting movements, the acting forces or torques change. Thus, at the very low rotational speed of the flap 15, a very large torque can be transmitted to the flap 15, so that especially in the region of the initial position 20, i.e., when the flap 15 rests against the frame part 13 to close the window 14, a large torque is present for sealing the connection between the flap 15 and the frame part 13 or for opening the flap 15, i.e., for performing the second pivoting movement 23.

[0094] The frame part 13 is captive and attached to the opening edge 8. The frame part 13 is attached to the opening edge 8 via a positive-locking connection and can only be detached from the opening edge 8 by destroying the frame part 13. The frame part 13 is mounted to the opening edge 8 by plastic deformation. This plastic deformation can be achieved, for example, by thermal treatment of the frame part 13, such as at least local heating.

[0095] A first seal 27, circumferencing the opening 4, is arranged between the inner surface 7 and a contact surface 26 of the frame part 13. The contact surface 26 is oriented parallel to a partial surface of the inner surface 7 of the cover element 3. The first seal 27 is located in the area of ​​this partial surface. The first seal 27 is attached to the frame part 13 and is positioned on this partial surface during the assembly of the frame part 13 onto the cover element 3. The first seal 27 can be manufactured together with the frame part 13, and optionally also with the flap 15, using a two-component injection molding process. Alternatively, the first seal 27 can be manufactured separately and then positioned at the intended location between the contact surface 26 and the cover element 3.

[0096] A second seal 28, circumferential to the window 14, is arranged between the frame part 13 and the flap 15. This second seal 28 enables the window 14, or the opening 4, to be sealed by means of a sealing connection between the flap 15 and the frame part 13. The second seal 28 is located on the frame part 13. The second seal 28 can be manufactured together with the frame part 13 using a two-component injection molding process. Alternatively, the second seal 28 can also be manufactured separately and then positioned at the designated location between the flap 15 and the frame part 13.

[0097] The tab 11 is connected to the base part 10 via a sealing element 29 only in an unpivoted starting position 20. The connection via the sealing element 29 is destroyed upon the first pivoting 21 of the tab 11. The sealing element 29 serves to indicate the status of the closure element 5 or the beverage container 2. An undamaged sealing element 29 indicates that the closure element 5 has not yet been actuated, i.e., the beverage container 2 has not been opened. Conversely, a damaged sealing element 29 indicates that the closure element 5 has been actuated at least once, i.e., the beverage container 2 has been opened at least once.

[0098] Fig. 5 The closure arrangement 1 shows Fig. 3 in a perspective view, with tab 11 in a starting position 20. Fig. 6 The closure arrangement 1 shows Fig. 5 in a perspective view in section. Fig. 7The closure arrangement 1 shows Fig. 3 in a perspective view, with tab 11 in a swiveled position. Fig. 8 The closure arrangement 1 shows Fig. 7 in a perspective view in section. Fig. 9 The closure arrangement 1 shows Fig. 3 in a perspective view, with tab 11 in a final position 32. Fig. 10 The closure arrangement 1 shows Fig. 9 in a perspective view in section. Fig. 11 The closure arrangement 1 shows Fig. 3 in a side view in section, with flap 15 closing window 14. Fig. 12 The closure arrangement 1 shows Fig. 11 in a side view in section, where the pivot of flap 15 is one degree. Fig. 13 The closure arrangement 1 shows Figs. 11 and 12 in a side view in section, where the pivot of the flap is 15 "10" degrees. Fig. 14The closure arrangement 1 shows Figs. 11 to 13 in a side view in section, where the pivot of the flap is 15 "20" degrees. Fig. 15 The closure arrangement 1 shows Figs. 11 to 14 in a side view in section, where the pivot of the flap is 15 "30" degrees. Fig. 16 The closure arrangement 1 shows Figs. 11 to 15 in a side view in section, with the tab 11 arranged in the end position 32.

[0099] The Figs. 5 to 16 will be described together below. The explanations regarding the Figs. 2 to 4 will be referred.

[0100] Starting from an unrotated initial position 20 (see Fig. 5, 6 ) causes the first pivoting 21 of the tab 11 by at least approx. 55 degrees, the second pivoting 23 of the flap 15 by approx. one degree (see Fig. 12If the first pivot 21 of the tab 11 is approximately 90 degrees, the flap 15 is pivoted further by the third pivot 24, and the entire second pivot 23 (i.e., the previous second pivot 23 and the third pivot 24 together) is approximately 10 degrees (see Fig. 13 ). If the first pivot 21 of the tab 11 is approximately 120 degrees, the second pivot 23 is approximately 20 degrees (see Fig. 14 ). If the first pivot 21 of the tab 11 is approximately 135 degrees, the second pivot 23 is approximately 30 degrees (see Fig. 15 ). If the first pivot 21 of the tab 11 is approximately 170 degrees, the second pivot 23 is approximately 45 degrees (see Fig. 15 ).

[0101] Starting from the unpivoted initial position 20, the first pivoting of the tab 11 by approximately 180 degrees, i.e., into the final position 32, causes the second pivoting 23 of approximately 45 degrees (see Fig. 16 ).

[0102] Starting from the initial position 20, a first pivoting 21 of the tab 11 initially causes only a slight second pivoting 23 of the flap 15, or this second pivoting 23 only begins to occur from a minimum amount of the first pivoting 21 ( Figs. 11 and 12 If the tab 11 is increasingly pivoted, i.e. towards the end position 32 of the tab 11, the flap 15 is pivoted more strongly.

[0103] With a constant rotational speed of the tab 11 about the first axis of rotation 16, the rotational speed of the flap 15 about the fourth axis of rotation 33 changes. Initially, starting from the initial position 20, the rotational speed of the flap 15 is very low, while with increasing first pivoting 21 of the tab 11, the rotational speed of the flap 15 increases.

[0104] Inversely to the rotational speeds, or the speeds of the respective pivoting movements, the acting forces or torques change. Thus, at the very low rotational speed of the flap 15, a very large torque can be transmitted to the flap 15, so that especially in the region of the initial position 20, i.e., when the flap 15 rests against the frame part 13 to close the window 14, a large torque is present for sealing the connection between the flap 15 and the frame part 13 or for opening the flap 15, i.e., for performing the second pivoting movement 23.

[0105] The tab 11 assumes a self-locking position in its maximally pivoted end position. This self-locking position is stable, meaning that a torque is required to move the tab 11 out of this position. After the initial actuation or pivoting of the tab 11, the tab 11 is held in its initial position 20 by an elastic deformation of another component of the locking element 5. The elastic deformation of the other component enables the formation of a positive or force-fit connection, which prevents further pivoting or a return pivoting of the tab 11. This positive or force-fit connection can be released by actuating the tab 11.

[0106] Fig. 17 shows a locking arrangement 1 in a side view in section; with the tab 11 in a starting position 20. Fig. 18 The closure arrangement 1 shows Fig. 17in a side view in section, with tab 11 in a pivoted position. Figs. 17 and 18 will be described together below. The explanations regarding the Figs. 2 to 16 will be referred.

[0107] The base part 10 has a venting element 30, wherein a fluid connection between the inner surface 7 and the outer surface 6 is formed during a first pivoting 21 of the tab 11 by the venting element 30. The first pivoting 21 of the tab 11 causes a deformation of the venting element 30. The venting element 30 is arranged on the flap 15. The venting element 30 is integrally connected to the base part 10. The venting element 30 can be manufactured, or has been manufactured, together with the frame part 13 and the flap 15 in a two-component injection molding process.

[0108] The venting element 30 is tubular and enables a fluid connection between the interior 7 of the beverage container 2 and its surroundings 31. Venting, i.e., pressure equalization between the interior of the beverage container 2 and its surroundings 31, can occur via the venting element 30. The venting element 30 has a minimum opening cross-section of 1 to 4 mm² along its tubular shape, preferably constant. This minimum opening cross-section is reduced to zero, at least locally, when the venting element 30 is deformed, so that when the tab 11 is in its initial position 20, the fluid connection is blocked and venting via the venting element 30 is not possible (see Figure 1). Fig. 17 ).

[0109] In the proposed closure element 5, only the flap 15 is pivoted by the frame part 13 to expose the window 14 or the opening 5. Before the flap 15 pivots, venting occurs via a venting element 30, so that the flap 15 does not have to move against any internal pressure that may be present in the beverage container 2. However, pivoting of the flap 15 is also possible without the venting element 30 at low torques, because, due to the implemented toggle lever principle, a small torque at the tab 11 is translated into a high torque at the flap 15.

[0110] Fig. 19 Figure 5 shows another closure element in an exploded view in a perspective view. Fig. 20 shows a closure arrangement 1 with a closure element 5 according to Fig. 19 in a perspective view in section. Fig. 21 The further closure arrangement 1 shows Fig. 20in a perspective view in section. Figs. 19 to 21 will be described together below. The explanations regarding the Figs. 2 to 18 will be referred.

[0111] Unlike the locking element 5, which is located in the Figs. 2 to 18 As shown, in the further locking element 5, the flap 15 is pluggably connected to the frame part 13 via a fourth pivot axis 33.

[0112] Furthermore, the lid element 3 is in a different manufacturing state, namely with only a tilted outer edge and not with a bent outer edge (cf. in the Figures 3 to 16 ).

[0113] In particular, the arrangement of the closure element 5 is essentially independent of the manufacturing state of the lid element 3. If necessary, only the opening 4 in the lid element 3 is required for the placement of the closure element 5, while other forming processes could then take place at a later stage. However, it is more common to fully form the lid element 3 and then attach the closure element to it. The lid element 3 with closure element 5 is then joined to the rest of the beverage container 2, i.e., the base and walls, to form the finished beverage container 2.

[0114] While in the case of the locking element 5 after Figs. 2 to 18 The base part 10 is made in one piece (frame part 13 and flap 15 are materially connected at the fourth pivot axis 33), is in the further locking element according to Figs. 19 to 21the base part 10 is designed in at least two parts (frame part 13 and flap 15 form a pluggable connection, whereby the fourth pivot axis 33 is formed via the connection.

[0115] Fig. 22 Figure 1 shows a closure arrangement 1 with a protective flap 34 in a side view in section. Fig. 23 The closure arrangement 1 shows Fig. 22 , with the protective flap 34 in a pivoted position. Fig. 24 The closure arrangement 1 shows Figs. 22 and 23 with the tab 11 in a final position 32. The Figs. 22 to 24 will be described together below. The explanations regarding... Figs. 19 to 21 will be referred.

[0116] Unlike the locking element 5, which is located in the Figs. 19 to 21As shown, the closure element 5 depicted here has a protective flap 34 which is pivotably connected to the now shortened tab 11 via a fifth pivot axis 35. The protective flap 34 covers the opening 4 and / or the window 14, thus ensuring that at least parts of the closure element 5 are protected from the surroundings 31. The protective flap 34 has a sealing element 29 by means of which the protective flap 34 is connected to the frame part 13. The first movement of the protective flap 34 causes the sealing element 29 to break.

[0117] In Fig. 23 It can be seen that the protective flap 34 (starting from an initial position 20) is first moved in a first direction of rotation, thus destroying the sealing element 29. In Figs. 23 and 24 It can be seen that by a further pivoting of the protective flap 34 the tab 11 is then pivoted (first pivoting 21 in Fig. 23), wherein the protective flap 34 is at least temporarily supported by the cover element 3.

[0118] In Fig. 24 The protective flap 34 and the tab 11 are arranged in a fully pivoted end position 32, with the flap 15 also being arranged pivoted by the second pivot 23 or by the third pivot 24. Reference symbol list

[0119] 1 Closure arrangement 2 Beverage container 3 Lid element 4 Opening 5 Closure element 6 Outside 7 Inside 8 Opening edge 9 Opening plane 10 Base part 11 Tab 12 Lever element 13 Frame part 14 Window 15 Flap 16 First axis of rotation 17 Second axis of rotation 18 Third axis of rotation 19 Distance 20 Starting position 21 First pivot 22 First angle 23 Second pivot 24 Third pivot 25 Hinge 26 Contact surface 27 First seal 28 Second seal 29 Sealing element 30 Venting element 31 Surroundings 32 End position 33 Fourth axis of rotation 34 Protective flap 35 Fifth axis of rotation

Claims

1. Closure assembly (1) for a beverage container (2), at least comprising a lid element (3) with an opening (4) and comprising a closure element (5) which is arranged on the lid element (3) and which serves for repeatably closing the opening (4); wherein the lid element (3) has an outer side (6) and an inner side (7), and the opening (4) has an opening edge (8) and an opening plane (9) formed by the opening edge (8); wherein the closure element (5) has at least a base part (10), a tab (11) and a lever element (12); wherein the base part (10) has a frame part (13), which is arranged on the opening edge (8) and which has a window (14), and a flap (15), which is pivotably connected to the frame part (13) for the purposes of closing the window (14) and thus the opening (4); wherein the tab (11) is pivotably connected via a first axis of rotation (16) to the frame part (13); wherein the lever element (12) is connected via a second axis of rotation (17) to the tab (11) and via a third axis of rotation (18) to the flap (15); characterized in that at least • the lever element (12) is only connected with the tab (11) and with the flap (15) or • the third axis of rotation (18) is arranged spaced apart from the second axis of rotation, wherein the spacing between the second axis of rotation (17) and the third axis of rotation (18) is constant and is defined by the lever element (12) on which said two axes of rotation (17, 18) are arranged.

2. Closure assembly (1) as claimed in claim 1, wherein the first axis of rotation (16) and the second axis of rotation (17) are arranged parallel and with a spacing (19) to one another.

3. Closure assembly (1) as claimed in any one of the preceding claims, wherein the tab (11) is pivotable from a non-pivoted initial position (20) in a first pivoting movement (21) about the first axis of rotation (16) and, as a result of this first pivoting movement (21), the flap (15) is pivotable relative to the frame part (13).

4. Closure assembly (1) as claimed in any one of the preceding claims, wherein the tab (11), the base part (10) and the lever element (12) interact in the manner of a toggle lever, such that a first pivoting movement (21) of the tab (11) about the first axis of rotation (16) by a first angular extent (22) causes a second pivoting movement (23) of the flap (15) relative to the opening plane (9), and a further first pivoting movement (21) of the tab (11) by a further first angular extent (22) causes a third pivoting movement (24) of the flap (15), wherein the second pivoting movement (23) and the third pivoting movement (24) are of different magnitude.

5. Closure assembly as claimed in claim 4, wherein, proceeding from a non-pivoted initial position (20), the first pivoting movement (21) of the tab (11) by at least 45 angular degrees causes the second pivoting movement (23) of at most 5 angular degrees.

6. Closure assembly (1) as claimed in claim 5, wherein, proceeding from the non-pivoted initial position (20), the first pivoting movement (21) of the tab (11) by at most 150 angular degrees causes the second pivoting movement (23) of at least 30 angular degrees.

7. Closure assembly (1) as claimed in any one of the preceding claims, wherein the flap (15) is connected to the frame part (13) via a hinge (25) or via a fourth axis of rotation (33).

8. Closure assembly (1) as claimed in any one of the preceding claims, wherein the frame part (13) is arranged captively on the opening edge (9).

9. Closure assembly (1) as claimed in any one of the preceding claims, wherein the closure element (5) allows repeatable gas-tight closure of the opening (4).

10. Closure assembly (1) as claimed in any one of the preceding claims, wherein, between the inner side (7) and a contact surface (26) of the frame part (13), there is arranged a first gasket (27) which encircles the opening (4).

11. Closure assembly (1) as claimed in any one of the preceding claims, wherein, between the frame part (13) and the flap (15), there is arranged a second gasket (28) which encircles the window (14).

12. Closure assembly (1) as claimed in any one of the preceding claims, wherein the tab (11) is connected, only in a non-pivoted initial position (20), via a seal element (29) to the base part (10); wherein the connection via the seal element (29) is destroyed when a first pivoting movement (21) of the tab (11) is performed for the first time.

13. Closure assembly (1) as claimed in any one of the preceding claims, wherein the base part (10) has a ventilation element (30), wherein, upon a first pivoting movement (21) of the tab (11), a fluidic connection is formed between the inner side (7) and the outer side (6) through the ventilation element (30); wherein the first pivoting movement (21) of the tab (11) causes a deformation of the ventilation element (30).

14. Closure assembly (1) as claimed in any one of the preceding claims 1 to 12, wherein, in the non-pivoted initial position (20) of the tab (11), the flap (15) forms a fluid-tight connection with the frame part (13), wherein, upon a first pivoting movement (21) of the tab (11), the fluid-tight connection can be eliminated as a result of the second pivoting movement (23) of the flap (15); wherein a fluidic connection of the inner side (7) to the outer side (6) occurs exclusively by way of the elimination of the fluid-tight seal.

15. Closure assembly (1) as claimed in any one of the preceding claims, wherein a force required for the first pivoting movement (21) of the tab (11) is at most 20 newtons.

16. Closure assembly (1) as claimed in any one of the preceding claims, wherein the tab (11) assumes a self-locking position in each case in a non-pivoted initial position (20) and in the region of a maximally pivoted end position (32).

17. Closure assembly (1) as claimed in any one of the preceding claims, wherein the tab (11), in a non-pivoted initial position (20), is arranged so as to be protected with respect to surroundings (31) by a protective flap (34).

18. Closure assembly (1) as claimed in claim 17, wherein the protective flap (34) is pivotably connected via a fifth axis of rotation (35) to the tab (11).

19. Use of a closure assembly (1) as claimed in any one of the preceding claims 1 to 18 for the repeatable fluid-tight closure of a beverage can.

20. Method for repeatably closing an opening (4) of a beverage container (2) having a closure assembly (1), wherein the closure assembly at least comprises a lid element (3) with an opening (4) and comprises a closure element (5) which is arranged on the lid element (3) and which serves for repeatably closing the opening (4); wherein the lid element (3) has an outer side (6) and an inner side (7), and the opening (4) has an opening edge (8) and an opening plane (9) formed by the opening edge (8); wherein the closure element (5) has at least a base part (10), a tab (11) and a lever element (12); wherein the base part (10) has a frame part (13), which is arranged on the opening edge (8) and which has a window (14), and a flap (15), which is pivotably connected to the frame part (13) for the purposes of closing the window (14) and thus the opening (4); wherein the tab (11) is pivotably connected via a first axis of rotation (16) to the frame part (13); wherein the lever element (12) is connected via a second axis of rotation (17) to the tab (11) and via a third axis of rotation (18) to the flap (15); characterized in that at least • the lever element (12) is only connected with the tab (11) and with the flap (15) or • the third axis of rotation (18) is arranged spaced apart from the second axis of rotation, wherein the spacing between the second axis of rotation (17) and the third axis of rotation (18) is constant and is defined by the lever element (12) on which said two axes of rotation (17, 18) are arranged; wherein, proceeding from a non-pivoted initial position (20) of the tab (11), in which the window (14) is closed by the flap (15), the method has at least the following steps: a) pivoting the tab (11) about the first axis of rotation (16) by a first angular extent (22) in a first pivoting movement (21), wherein the flap (15) is thus pivoted relative to the opening plane (9) through a second pivoting movement (23); b) performing a further first pivoting movement (21) of the tab (11) by a further first angular extent (22), wherein the flap (15) is thus pivoted relative to the opening plane (9) through a third pivoting movement (24); wherein the second pivoting movement (23) and the third pivoting movement (24) are of different magnitude.

21. Method as claimed in claim 20, wherein the base part (10) has a ventilation element (30), wherein, upon a first pivoting movement (21) of the tab (11) out of the non-pivoted initial position (20), a fluidic connection is formed between the inner side (7) and the outer side (6) through the ventilation element (30), and pressure equalization between the beverage container (2) and surroundings (31) is thus realized; wherein the first pivoting movement (21) of the tab (11) causes a deformation of the ventilation element (30).

22. Method as claimed in claim 20, wherein, in the non-pivoted initial position (20) of the tab (11), the flap (15) forms a fluid-tight connection with the frame part (13), wherein, upon a first pivoting movement (21) of the tab (11), the fluid-tight connection is eliminated as a result of the second pivoting movement (23) of the flap (15); wherein pressure equalization between a content of the beverage container (2) and surroundings (31) is performed exclusively by way of the elimination of the fluid-tight seal.

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