CAN LID, CAN AND METHOD FOR MANUFACTURING A CAN LID

Abstract

A can lid includes at least one lid panel having at least one pouring opening, an actuating element disposed on an upper side of the lid panel, and a closure element disposed on a lower side of the lid panel. The closure element is fastened to the actuating element by a connection and is movable by the actuating element between a closed position, in which the closure element closes the pouring opening in a liquid-tight or gas-tight manner, and an open position, in which the pouring opening is at least partially uncovered. At least one protrusion is defined in the lid panel facing the closure element, and an air channel is formed between the closure element and the lid panel by a deflection of at least a section of the closure element at the protrusion, when the closure element is being moved towards or is in the open position.

Claims

1. A can lid for a can, the can lid comprising: at least one lid panel configured to delimit an upper side of the can, the lid panel having at least one pouring opening through which a substance present in the can may be poured out; an actuating element disposed on an upper side of the lid panel which faces away from an interior of the can when the can lid is attached thereto; and a closure element disposed on a lower side of the lid panel which faces an interior of the can when the can lid is attached thereto, wherein the closure element is fastened to the actuating element by a connection, wherein: the closure element is movable by the actuating element between a closed position, in which the closure element closes the pouring opening in a liquid-tight or gas-tight manner, and an open position, in which the pouring opening is at least partially uncovered; at least one protrusion is defined in the lid panel, the at least one protrusion facing the closure element; and an air channel is formed between the closure element and the lid panel by a deflection of at least a section of the closure element at the protrusion, when the closure element is being moved towards or is in the open position.

2. The can lid according to claim 1, wherein the closure element is movable between the closed position and the open position in a guided manner along the lid panel substantially translationally in a straight line parallel to a plane in which the lid panel extends.

3. The can lid according to claim 1, wherein the connection moves along and at least partially within a guide slot defined in the lid panel while moving the closure element between the closed position and the open position.

4. The can lid according to claim 1, wherein a distance between the actuating element and the closure element in an area of the connection is non-variable.

5. The can lid according to claim 1, wherein the connection is configured as a riveted connection which is formed by a rivet nipple formed in the closure element or the actuating element, the rivet nipple being disposed in a corresponding rivet opening of the other of the closure element and the actuating element.

6. The can lid according to claim 5, wherein the rivet opening extends through a protrusion.

7. The can lid according to claim 1, wherein the connection is selected from the group consisting of a riveted connection, a welded connection, and combinations thereof.

8. The can lid according to claim 3, wherein at least one planar surface is formed on the connection in a region extending through the guide slot, and wherein the at least one planar surface faces an edge of the lid panel, the edge delimiting the guide slot.

9. The can lid according to claim 1, wherein the can lid has at least one seal which is disposed between the closure element and the lid panel at least in the closed position of the closure element.

10. The can lid according to claim 1, wherein, a first end of the air channel opens at the upper side of the lid panel or at an end region of the pouring opening, the end region facing away from a lid panel edge, and a second end of the air channel opens at a lower side of the lid panel at an end region of the closure element, the end region facing away from the pouring opening.

11. The can lid according to claim 3, wherein the actuating element has at least one fastening section, in which the connection with the closure element is formed, and a handle section connected thereto configured for gripping for repositioning between the open position and the closed position; and wherein the fastening section and the handle section are connected by a film hinge, wherein the handle section is configured to be pivoted about a hinge axis relative to the fastening section for repositioning between a stowed position and an actuating position.

12. The can lid according to claim 11, wherein a hinge axis of the film hinge extends transversely to a longitudinal axis of the guide slot.

13. The can lid according to claim 11, wherein the handle section has a starting position; wherein the actuating element is configured such that the handle section can no longer be permanently repositioned back into the starting position after it is initially repositioned from the starting position; and/or wherein the actuating element is configured such that it plastically deforms, in particular permanently and/or permanently visually recognizable, when the handle section is initially repositioned from the starting position.

14. The can lid according to claim 1, wherein the actuating element has a locking section by which the actuating element is locked in the closed position on the lid panel prior to an initial repositioning from the closed position to the open position.

15. The can lid according to claim 1, wherein the closure element and the actuating element are made of a metallic material.

16. The can lid according to claim 6, wherein the protrusion is a protrusion of the actuating element that protrudes in the direction of the lower side of the lid panel, and wherein the protrusion extends at least partially through a guide slot, which is defined in the lid panel, in at least one of the open position and the closed position.

17. The can lid according to claim 9, wherein the seal is at least partially received in a groove which is formed on an upper side of the closure element.

18. The can lid according to claim 9, wherein the seal is fixed to the closure element by an outer edge of the closure element, the outer edge being bent into the seal and/or over a section of the seal.

19. The can lid according to claim 11, wherein the handle section is pivotable between the stowed position, in which the handle section is disposed substantially parallel to the lid panel and/or to the fastening section, and the actuating position, in which the handle section is grippable for repositioning between the open position and the closed position.

20. The can lid according to claim 1, wherein a sealing effect of the closure element with the lower side of the lid panel is overcome along at least at a section of the closure element which is deflected at the protrusion.

21. The can lid according to claim 1, wherein the at least one protrusion is configured as a circumferential bead.

22. The can lid according to claim 1, wherein the at least one protrusion is configured to deflect at least sections of the closure element downwards.

23. The can lid according to claim 1, wherein the closure element or the lid panel is configured to elastically deform upon deflection at the protrusion to form the air channel.

24. The can lid according to claim 1, wherein the closure element is configured to tilt downward upon deflection at the protrusion to form the air channel.

25. The can lid according to claim 1, wherein an end region of the closure element or the protrusion on the lid panel is configured as a ramp for lifting a section of the closure element off the lid panel upon deflection at the protrusion.

26. A can, comprising at least one can lid according to claim 1.

27. The can according to claim 26, wherein an outer circumferential edge of the lid panel is crimped to a lateral wall of the can.

28. A method for manufacturing a can lid for a can, comprising the following steps: providing a lid panel configured to delimit an upper side of the can, the lid panel having at least one pouring opening, through which a substance present in the can be poured out; providing an actuating element and a closure element; disposing the closure element on a lower side of the lid panel, the lower side facing an interior of the can when the can lid is attached thereto; disposing the actuating element on an upper side of the lid panel, the upper side facing away from an interior of the can when the can lid is attached thereto; fastening the closure element and the actuating element to one another by a connection; wherein: the closure element is movable by the actuating element between a closed position, in which the closure element closes the pouring opening in a liquid-tight or gas-tight manner, and an open position, in which the pouring opening is at least partially uncovered; at least one protrusion is defined in the lid panel, the at least one protrusion facing the closure element; and an air channel is formed between the closure element and the lid panel by a deflection of at least a section of the closure element at the protrusion, when the closure element is being moved towards or is in the open position.

29. The method according to claim 28, wherein the actuating element comprises a locking section by which the actuating element is locked in the closed position on the lid panel prior to an initial repositioning from a closed position to the open position.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0241] FIG. 1 a schematic top perspective view of a can lid in its closed position;

[0242] FIG. 2 a schematic top perspective view of the can lid according to FIG. 1 with a handle section of an actuating element of the can lid lifted from a starting position;

[0243] FIG. 3 a schematic side view of the can lid according to FIG. 1 without a lid panel, wherein the handle section is shown in the position according to FIG. 2;

[0244] FIG. 4 a schematic top perspective view of the can lid according to FIG. 1 with the handle section in its actuating position;

[0245] FIG. 5 a schematic side view of the can lid according to FIG. 1 without lid panel, wherein the handle section is shown in the position according to FIG. 4;

[0246] FIG. 6 a schematic top view of the can lid according to FIG. 1, wherein the handle section is shown in the position according to FIG. 4;

[0247] FIG. 7 a schematic top view of the can lid according to FIG. 1 in its open position;

[0248] FIG. 8A a schematic top view of a lid panel for the can lid according to FIG. 1;

[0249] FIG. 8B a schematic top view of a variant of the lid panel of FIG. 8A;

[0250] FIG. 8C a schematic top view of another variant of the lid panel of FIG. 8A;

[0251] FIG. 9 a schematic bottom view of a can lid according to FIG. 1 in its closed position;

[0252] FIG. 10 a schematic top view of a further embodiment of the can lid in its closed position;

[0253] FIG. 11 a schematic side view of the can lid according to FIG. 10;

[0254] FIG. 12 a schematic lateral sectional view of the can lid according to FIG. 10, cut along line B-B;

[0255] FIG. 13 a schematic side sectional view of the can lid according to FIG. 10, cut along line C-C;

[0256] FIG. 14 a schematic lateral sectional view of the can lid according to FIG. 10, cut along line A-A;

[0257] FIG. 15 a schematic sectional view of a possible configuration of a seal of the can lid according to FIG. 1 and FIG. 10;

[0258] FIG. 16 schematic exploded view of a closure element;

[0259] FIG. 17 another configuration of a lid for use with the closure system;

[0260] FIG. 18 a further configuration of a lid for use with the closure system; and

[0261] FIG. 19 a further configuration of a closure element.

[0262] While the above-identified figures set forth one or more embodiments of the present invention, other embodiments are also contemplated, as noted in the discussion. In all cases, this disclosure presents the invention by way of representation and not limitation. It should be understood that numerous other modifications and embodiments can be devised by those skilled in the art, which fall within the scope and spirit of the principles of the invention. The figures may not be drawn to scale, and applications and embodiments of the present invention may include features, steps and/or components not specifically shown in the drawings.

DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS

[0263] FIG. 1 shows a resealable can lid 10 for a can, for example a beverage can, from above in a schematic perspective view. The can lid has a lid panel 12 which, when attached to a can body, closes off the top of the can body. An upward direction of the can lid 10 may be defined by a standing can. The upper side of respective parts of the can lid are defined with respect to a side which faces away from an interior of the can. Respective lower sides face the interior. The terms top and bottom or upper side and lower side refer to the usual arrangement of the lid on a can. However, it goes without saying that the can lids according to the invention may also be oriented or attached to a can in a different way, if required.

[0264] Can lid 10 is a round flat body and has a circumferential bead 13 (see e.g. FIG. 2) radially on the outside for reinforcement. At its outer circumferential edge, the lid panel 12 may be crimped to the can body for connection and thus production of the sealed can. The lid panel 12 may have external dimensions and materials corresponding to a conventional lid panel for beverage cans. Here, for example, the lid panel 12 is made of a metallic material such as tinplate or aluminum sheet and has been manufactured in a deep drawing and/or punching process. On its upper side and its lower side, the lid panel 12 is additionally coated with plastic.

[0265] The lid panel 12 also has a pouring opening 14, which can be seen, for example, in FIG. 7. The pouring opening 14 is at least partially oval in shape. A content of the can, such as a beverage, may be poured out through the pouring opening when the can lid 10 is open.

[0266] Furthermore, can lid 10 has an actuating element 16, which is disposed on the upper side of the lid panel 12. The can lid 10 has a closure element 18, which is disposed on the lower side of the lid panel 12. The closure element 18 is shown, for example, in FIG. 3. The closure element 18 is movable, in a translational manner and substantially free of rotation, between a closed position and an open position, these positions corresponding to a closed or open can lid 10. In its closed position, the closure element 18 closes the pouring opening 14 in a gas-tight and a liquid-tight manner. In particular, the closure element 18 covers the pouring opening 14 in the closed position thereby sealing it from the inside against the interior of the can. In its open position, the closure element 18 at least partially uncovers the pouring opening 14.

[0267] In the present invention, the actuating element 16 and the closure element 18 are made of a metallic material. For example, the actuating element 16 and the closure element 18 may be made of the same material as the lid panel 12. Preferably, the actuating element 16 and the closure element 18 also have a plastic coating on their upper and lower sides. Alternatively, the closure element 18 and/or the actuating element 16 may be formed of plastic, for example by injection molding.

[0268] The actuating element 16 is connected to the closure element 18. By a movement of the actuating element 16, the closure element 18 may therefore be moved, in particular in a guided manner, between the closed position and the open position. By way of example, one type of guiding will be described below. Preferably, the connection is formed as a riveted connection, which is shown here and will be described in further detail below. Alternatively, the connection may be a welded connection, for example.

[0269] The actuating element 16 has a handle section 20 and a fastening section 22. The actuating element 16 is integrally formed from a sheet of metal. The handle section 20 and the fastening section 22 are connected by a film hinge 24 as a joint. The film hinge 24 permits rotation of the handle section 20 relative to the fastening section 22 about the longitudinal axis thereof. Here, the film hinge 24 is formed by a local attenuation in the actuating element, for example by a notch.

[0270] In FIG. 2, a schematic perspective view shows how the handle section 20 has been partially rotated upward from its starting position, shown in FIG. 1, relative to the fastening section 22. At its end which faces away from the fastening section 22, the handle section 20 has a region with a smaller thickness. This makes it particularly easy to lift the handle section 20 from its starting position, for example with a fingernail. In the starting position (FIG. 1), the handle section extends substantially parallel to the lid panel 12 and lies substantially flat against it.

[0271] FIG. 4 shows an actuating position of the handle section 20 in a schematic perspective view. In this position, the handle section 20 is rotated far upwards, for example at least 60? or at least 80? relative to a plane defined by the fastening section 22 and/or the lid panel. As a result, the handle section 20 may be gripped particularly easily for shifting the closure element 18, for example with two fingers. On its upper side, the handle section 20 additionally has a recess 26 (see FIG. 1), which may provide extra grip for a finger (in particular the thumb) during repositioning.

[0272] On the lower side, the actuating element 16 has a locking section 28. This locking section is also formed integrally with the remainder of the actuating element 16 from a metal sheet. For example, the metal sheet may be bent over (in particular folded) in the section 30 to form a second material layer on the actuating element 16. The second layer of material forming the locking section 28 may also be considered as part of the handle section 20. The two layers of material may strengthen the handle section 20, allowing higher actuating forces without causing damage. The bending over also allows the thin edge region 30 to be formed economically in a single manufacturing step. The locking section 28 is held by a rounded edge of the handle section 20 in further portions 29, which also avoids a sharp outer edge.

[0273] The locking section 28 has a locking element 32 which protrudes from the lower side. Here, the locking element 32 is configured as a hook, which can be seen particularly clearly in the side view of FIG. 3. In the starting position, the locking element 32 extends into a corresponding recess 34 of the closure element 18 so that the handle section 20 can lie flat and the hook can engage with the rear of the lid panel 12. The handle section 20 is thus locked in the starting position.

[0274] When the handle section 20 is lifted, the locking element 32 may plastically deform and thus detach itself from the lid panel 12. In this way, it is possible to provide a tamper evidence feature, which may be used to identify a first opening of the can. After initial lifting, the plastic deformation may prevent re-locking. The release of the locking element 32 may cause a noise, which may also be perceived as a signal by the user. In another embodiment, the locking element 32 may only deform substantially elastically when the can is initially opened. This allows the locking element 32 to re-lock on the lid panel when the handle section 20 is repositioned back, for example by way of a snap-in and/or a snap on connection. Thus, a transport lock may be provided even after the initial opening. This re-locking may also cause a noise, which signals the re-locking to the user.

[0275] In the embodiment shown, the actuating element 16 is preferably configured to deform after the handle section 20 is initially moved from its starting position. This may prevent the handle section 20 from being repositioned back to its starting position and/or may indicate that the handle section 20 has been initially opened. For example, the film hinge 24 may deform and/or tear at an outer edge such that the handle section 20 no longer remains in the starting position and/or that the deformation and/or tear is apparent to a user. For example, the handle section may only return to an intermediate position, as shown in FIGS. 2 and 3, after an initial opening. Advantageously, reverse bending of the handle section 20 is further prevented by the fact that downward rotation beyond the lid panel 12 would be necessary for reversing the plastic deformation but is blocked by the lid panel 12 due to the attachment of the actuating element 16 thereto. Preferably, the locking section 28 does not extend to the film hinge 24. This may facilitate a corresponding deformation as a tamper evidence feature. The starting position may correspond to a stowed position of the handle section 20 prior to an initial opening.

[0276] FIG. 5 again shows a schematic side view of the handle section 20 in its operation position. As in FIG. 3 the lid panel 12 is not shown. FIG. 6 shows a schematic top view of the can lid 10, wherein the handle section 20 is shown in the actuating position but the can lid 10 and thus also the actuating element 16 and the closure element 18 (not visible in FIG. 6) are still in the closed position. In FIG. 7, on the other hand, the can lid 10 and thus also the actuating element 16 and the closure element 18 are in the open position. For this purpose, the actuating element 16 and thus also the closure element 18 are pulled and/or pushed upwards in the image plane of FIGS. 6 and 7. Conversely, for re-sealing, the actuating element 16 and thus also the closure element 18 may be pulled and/or pushed downwards in the image plane of FIGS. 6 and 7.

[0277] FIG. 8A shows the lid panel 12 in a schematic top view, with the actuating element 16 and the closure element 18 not being shown. The lid panel 12 has a further passage region in addition to the pouring opening 14 in the form of an elongated guide slot 34. The connection between the actuating element 16 and the closure element 18 is disposed in the guide slot 34, thereby guiding the shifting of the closure element 18 between the closed position and the open position. Furthermore, the locking element 32 is also disposed in the guide slot 34 before the can is initially opened.

[0278] In the embodiment shown, the pouring opening 14 and the guide slot 34 are formed as a common through opening in the lid panel 12. This allows them to be manufactured together at low cost, for example in a punching process. At its end region 36 which faces away from the pouring opening 14, can lid 12 has two relief notches 38 which extend substantially transversely to the longitudinal extension of the guide slot 34. As a result, the corners in the end region 36 of the guide slot 34 are rounded, which counteracts tearing due to internal pressure in the can.

[0279] The lid panel 12 may further have a configuration which may provide pressure equalization when the can is opened. For example, as shown in FIG. 8B, a notch 40 may optionally be disposed adjacent to the pouring opening 14 at a region remote from the direction of movement of the actuating element 16 from the closed position to the open position. This notch may form a thin channel between the interior and the exterior of the can prior to the actual uncovering of the pouring opening 14. Due to an overpressure in the interior of the can, a distinct fizzing sound may thus be produced which signals this overpressure and thus the freshness of the beverage to the user.

[0280] As an alternative to a notch, as shown in FIG. 8C, an additional through opening 42 with a small diameter may optionally be disposed in this region to also uncover a channel having a small cross-section prior to the actual uncovering of the pouring opening 14 during opening. The through opening 42 may also be referred to as pressure equalizing opening. By this, too, the overpressure and thus the freshness of the can contents may be acoustically signaled to a user.

[0281] In FIG. 9A the can lid 10 with the closure element 18 in the closed position is shown in a bottom view. The closure element 18 covers the pouring opening 14. In FIG. 9B, the closure element 18 is shown in the open position. The pouring opening 14 is largely uncovered. In particular, the pouring opening 14 is uncovered such that a drinking straw (not shown) may be passed directly through the pouring opening 14 into the can.

[0282] FIG. 10 illustrates the can lid 10 in a further top view.

[0283] FIG. 11 shows the can lid 10 according to FIG. 10 in a schematic side view. FIG. 12 corresponds to a sectional view along the line B-B as indicated in FIG. 10.

[0284] It can be seen in FIG. 12 that a seal 44 is disposed on the closure element 18 in a groove on the upper side and faces the lid panel 12. The seal 44 can also be seen in FIGS. 3 and 5. The closure element 18 is connected to the actuating element 16 such that the seal 44 is pressed against the lower side of the lid panel 12, thus sealing the pouring opening 14 in the closed position. For this purpose, the actuating element 16 rests only with its curved edge 46 on the upper side of the lid panel 12 and may thus be easily preloaded. For example, the actuating element may be substantially straight in the unconnected state and may be bent through towards the closure element 18 when connected thereto. Alternatively, the closure element, in particular the lower side thereof, may be cambered, in particular concavely cambered, in the unconnected state.

[0285] In the area of the film hinge 24, the closure element 18 has a region 49 abutting the lid panel 12. This may support the actuating element 18, in particular the film hinge 24, as well as the lid panel 12 in this region when the handle section 20 is pivoted. In this way, overloading and unwanted deformation of the lid panel 12 may be prevented. Alternatively, or additionally, the closure element 18 may abut the lid panel along a central region 47.

[0286] In another aspect, the closure element 18 includes respective recesses 48. These recesses 48 may provide an additional air channel between the can interior and an ambiance when in the open position. Air may flow back through the air channel during pouring to allow for rapid and uniform pouring. For example, an inlet of the air channel may be formed by an opening between the actuating element 16 and the closure element 18. In the closed position, this opening is blocked by the lid panel 12. Moving this inlet into the region of the pouring opening 14 opens a gap between the actuating element 16 and the closure element 18 through which air can flow.

[0287] An opening may be uncovered as an outlet of the air channel by deflecting the closure element 18 at the circumferential bead 13 of the lid panel 12, thereby spacing it from the lower side of the lid panel. The closure element 18 and/or the lid panel 12 may elastically deform to also open a gap. The closure element may rotate slightly downward in an end region, so to speak. Alternatively, in the lid panel 12, a recess 50 in the form of an embossment may be disposed in the direction of the can interior downwards in this region (not shown), which may also bring about such a section-wise deflection of the closure element 18 from the lid panel 12.

[0288] Alternatively, one or more bulges 50 may be formed in the lid panel 12 in the upward direction. This also makes it possible to open at least one passage for the air channel in the open position. In this variant, the lid panel 12 is particularly resistant to deformation by internal can pressure. FIG. 8A illustrates, by way of example, four bulges 50 by dashed lines. These bulges may be produced as embossments.

[0289] FIG. 13 shows the sectional view of the can lid 10 along line C-C, FIG. 14 that along line A-A. Here, the connection of the actuating element 16 to the closure element 18 is seen particularly well. The connection does not penetrate the closure element 18. Instead, the closure element 18 has a rivet nipple 52 which protrudes from the closure element 18 toward the upper side and is at least partially disposed in the guide slot 34. The rivet nipple 52 extends through a rivet opening in the actuating element 16 to the upper side thereof and is clamped thereto by riveting. The actuating element 16 engages at least partially behind the rivet nipple 52.

[0290] The rivet opening of the actuating element 16 is disposed in a recess 54 of the actuating element 16 formed in the direction of the lower side. The recess 54 may also be considered as a protrusion, which preferably protrudes towards the lower side of the lid panel 12. The recess 54 extends into the guide slot 34 and may bear against the edge of the guide slot 34 formed by the lid panel 12 for guiding the repositioning movement between the closed position and the open position. The recess 54 allows the riveted connection, and thus also can lid 10, to have a low overall height. In particular, the riveted connection thus only needs to have a slightly greater height than a conventional riveting of a lid panel to a metal tab of a conventional can that is not resealable. As a result, conventional machines and processes may also be used for the can lid 10. In particular, the riveted connection does not need to have a thickness of the material of the lid panel 12, the actuating element 16 and the closure element 18, but only a thickness of the actuating element 16 and the closure element 18.

[0291] The recess 54 may also provide an anti-twist protection. For this purpose, the recess 54 has two substantially planar surfaces 56, which can be seen, inter alia, in FIG. 10. For example, the planar surfaces 56 extend substantially parallel to the edge of the lid panel 12 which delimits the guide slot 34. The planar surfaces 56 may bear against this edge as the actuating element 16 is shifted along the guide slot 34, thereby preventing unwanted rotation of the actuating element 16.

[0292] In the sectional view along line A-A according to FIG. 14, the double layer of material of the actuating element 16 in the region of the handle section 20 is seen particularly well. In addition, it can easily be seen that the locking element 32 engages behind the lid panel 12. FIG. 14 also shows that in this embodiment the handle section 20 is slightly inclined relative to the fastening section 22 toward the lid panel 12 before it is opened for the first time, and that it fits tightly thereto due to the locking.

[0293] FIG. 15 shows a particularly advantageous cross-sectional configuration of the seal 44 in a sectional view. It is shown that the seal 44 is at least partially received in a groove 58 of the closure element 18. The seal 44 has a sealing lip 60 on the upper side, with which it contacts the lower side of the lid panel 12. The sealing lip 60 is preferably inclined. In particular, the sealing lip 60 may extend radially inwardly from the groove 58 and/or be inclined radially inwardly. Below and radially inwardly of the sealing lip 60, the latter has an undercut 62. When the sealing lip 60 is pressed more strongly, for example due to an increased internal can pressure, the sealing lip may divert into this clearance. Thus, varying pressures may be compensated for without damaging the seal 44. In addition, due to friction between the seal 44 and the lid panel 12, an actuating force may vary less strongly with the internal can pressure. Radially outwardly, a clearance 64 is preferably provided in the groove 58, which is not occupied by the seal 44. This allows an compensation movement of the sealing lip 60 upon a movement to the left in the image plane of FIG. 15, by which the sealing lip 60 may be protected from damage during repeated opening and closing of the can lid 10.

[0294] FIGS. 12 to 14 show, as a further option, that the seal 44 may be clamped in the groove 58 by means of a folded edge 45 and/or that the groove may be formed by such a fold. In this way, an outer edge of the closure element 18 is sealed by the seal 44. This edge may, for example, not be coated with plastic. In this way, it is possible to prevent entry of metal particles into the can contents and/or corrosion of said edge, in particular by preventing contact with the can contents. Furthermore, the seal 44 is securely and simply held.

[0295] FIG. 16 again illustrates the shape of the closure element 18 in an exploded view before it is connected to the seal 44. It shows the rivet nipple 52 which is surrounded by the central region 47. At least sections of the central region, or, as shown in FIG. 16, the complete circumference thereof is surrounded by the recess 48 which also forms the air channel. A raised section 49 surrounding at least sections of the recess 48, or, as shown in FIG. 16, the complete circumference thereof, is provided, wherein the raised section 49 may bear against the lid panel 12 to support the hinge 24. The closure element 18 is preferably rotationally symmetrical for ease of fabrication.

[0296] FIGS. 17 and 18 show further optional features and embodiments of the lid panel 12 that may be used in combination with any of the lid panels 12 described above. Here, the lid panel 12 has at least one first recess 50A or a plurality of recesses 50A that may form a second open end of the air channel 48 during opening of the closure element 20 and/or in the open position thereof, as described above.

[0297] The at least one first recess 50A is preferably disposed such that it is disposed within the seal 49 in the closed position of the closure element 18 (see FIGS. 16 and 19).

[0298] The at least one first recess 50A is preferably disposed such that is to be covered, preferably completely covered, in the closed position of the closure element 18 (not shown in FIGS. 17 and 18) and/or the actuating element 16.

[0299] When the closure element 20 is repositioned from the closed position to the open position, a position, in particular an intermediate position, is preferably reached in which the seal 50 and/or the closure element 20 partially overlap(s) the at least one first recess 50A. In this way, pressure equalization may be achieved, in particular an initial pressure equalization, when the closure element 18 is opened. The at least one first recess 50A may be disposed such that, in the open position, it is completely overlapped by the closure element 18 and/or is disposed completely within the seal 44.

[0300] In combination with, or independently of, the at least one first recess 50A, the lid panel 12 may comprise at least one second recess 50B. This is preferably disposed such that it is not covered by the closure element 18 in the closed position and/or is not disposed, not even partially, within the seal 44 in the closed position. Preferably, the at least one second recess 50B is not concealed by the actuating element 16 in the closed position. In the open position, the at least one second recess is preferably partially (in particular only partially) overlapped by the closure element 20 and/or the seal 50 and/or the actuating element 16. In the closed position, the second recess 50B may thus provide an alternative open second end for the air channel 48. The use of different recesses 50A, 50B allows the flow of air through the air channel 48 to be selectively adjusted. For example, the at least one first recess may be sized such that fizzing occurs upon opening. For example, the at least one second recess 50B may be sized to prevent gurgling noises during pouring, particularly when the closure element 18 is fully open.

[0301] The second recess 50B may be formed, for example, as one or more recesses 50B disposed behind the actuating element 30 (see FIG. 17) and/or next to the actuating element 16 in the direction of shifting of the actuating element 16 (see FIG. 18).

[0302] The at least one first recess 50A and/or the at least one second recess 50B may protrude upward or downward. The at least one first recess 50A and/or the at least one second recess 50B may in particular be formed as an embossment in the lid panel 12.

[0303] In combination with, or independently of, the at least one first recess 50A and/or the at least one second recess 50B, the lid panel 12 may further comprise one or more (in particular two) third recesses 51. These may cooperate with one or more corresponding protrusions 73 on the upper side of the closure element 18 (see FIG. 21) to provide a longitudinal guide and/or an anti-twist protection for the closure element 18. In this respect, the recess 51 preferably protrudes upwardly. It may be formed as an embossment in the lid panel 12.

[0304] FIG. 19 shows a further embodiment of the closure element 18 to illustrate some further optional features. In particular, the closure element here has a first abutting region 49A and a second abutting region 49B, both of which protrude upwardly from the closure element 18. They serve to support the hinge. Independently of the abutting regions 49A, 49B, the closure element may further comprise a recess for receiving the locking element, which in the embodiment shown is provided as a recess 74 in addition to the air channel 48. As can also be seen, the closure element 18 does not need to be rotationally symmetrical.

[0305] Although a can lid and a can are described above, the disclosed closure device may also be attached to other containers for liquids. Such containers for liquids may, for example, be made of cardboard, plastic and/or metal. This applies in particular to containers which, at least in the region of a pouring opening, are made of a sufficiently rigid material. In the case of a liquid container, the lid panel mentioned herein may, for example, be substituted by a container wall and/or be formed by such a wall.

[0306] Moreover, although the present invention has been described with reference to preferred embodiments, workers skilled in the art will recognize that changes may be made in form and detail without departing from the spirit and scope of the invention.

REFERENCE LIST

[0307] 10 can lid [0308] 12 lid panel [0309] 13 bead [0310] 14 pouring opening [0311] 16 actuating element [0312] 18 closure element [0313] 20 handle section [0314] 22 fastening section [0315] 24 film hinge [0316] 26 recess [0317] 28 locking section [0318] 29 portion [0319] 30 thin region [0320] 32 locking element [0321] 34 guide slot [0322] 36 end region [0323] 38 relief notch [0324] 40 notch [0325] 42 through opening [0326] 44 seal [0327] 45 folded edge [0328] 46 edge [0329] 47 central region [0330] 48 recess [0331] 49 abutting region [0332] 49 first abutting region [0333] 49 second abutting region [0334] 50 recess [0335] 50 first recess [0336] 50 second recess [0337] 51 third recess [0338] 52 rivet nipple [0339] 54 recess [0340] 56 planar surface [0341] 58 groove [0342] 60 sealing lip [0343] 62 undercut [0344] 64 clearance [0345] 73 protrusion [0346] 74 cavity