EP2300328B1 - Drinks-can-lid closure - Google Patents

Abstract

The invention relates to a closure for a drinks can having a rotary lid (2) which is fastened at a rivet (5) of the can lid (D) such that it can be rotated over the pouring opening (7) from an opening rotary position into a closure rotary position, and back again, and is designed, at least in certain regions, as a curved snap-action disc (S) which, by virtue of forces acting perpendicularly to the lid-surface plane, can be transferred by bending, and once a pressure point has been overcome, from a stable first state of curvature into a stable second state of curvature, in which the outer periphery (10) of the rotary lid (2) is positioned with a closure pressure against the lid periphery (9) binding the pouring opening (7), and out of which the snap-action disc (S) springs back into its first state of curvature under the renewed action of force.

Description

The invention relates to a closure for a beverage can according to the preamble of claim 1.

Such a closure is from the WO 2005/026004 A1 known. At the same time, the lid is arranged on the can lid at the time of completion in the factory, namely welded. If the user wishes to open the can / lid unit for the first time, he must move a tab into which the lid extends into a blocking position in which the lid is definitively released from the can lid. As an independent part, after use, the user can re-insert the lid by hand into the pouring opening.

The present invention has for its object to improve such a beverage can closure in terms of sealing function and operability.

This object is achieved with a can closure of the type mentioned with the features of the characterizing part of claim 1.

For this purpose, the rotary cover is so connected captively via a groove with the can lid and at least partially formed as a curved snap disk, which is convertible by force perpendicular to the lid mirror plane from a stable first bending state by bending and after overcoming a pressure point in a stable second bending state in which the outer edge of the rotary lid to the pouring opening limiting lid edge applies with increased closing pressure and from which the snap-action disc by renewed force In its first bending state springs back (cracking-frog effect). The sealing tab ensures the sealing function permanently. A further increased closing pressure can be achieved, for example, by virtue of the fact that the rotary cover has a slightly larger outer diameter due to a lower deflection in the second bending state than in the first bending state.

From the DE 298 12116 U1 is a beverage can closure system with a connected via a rivet to the can lid rotary lid and a support which is located in a Aufdrücklasche or combined with the Aufdrücklasche. As a result, the sealing function can not always be permanently guaranteed to the desired extent.

The same applies to the one in the WO 97/36795 A1 shown beverage can closure, in which a non-supportable Aufdrücklasche and a rotary lid associated with it are attached via a rivet to the can lid.

In the post-published, ie to be considered only novelty under Art. 54 (3) and (4) EPC WO 2010/022951 A1 (corresponding DE 10 2008 044 981 A1 ), which is based on the invention of the present inventor, a beverage can closure according to the preamble of claim 1 is proposed in which a mounted on a rivet on the can lid rotary cover is attached as a snap-action disc, which is not secured in the closed position by a push-on.

It is possible according to the invention that the rotary cover in the second bending state, the lid covering the pouring opening slightly overlaps or under engages or engages in this, when the pouring opening limiting lid edge region, for example, groove-like, is formed.

For actuation of the snap-action disc, it is advantageous if the rotary lid is attached to the rivet with a fastening strap which, viewed from the snap-action disc, extends beyond the rivet and around an opposing actuating portion.

The closure rotational position, the rotary lid in particular can be safely taken when at the opposite end of the indenting the Aufdrücklasche a support is hinged, which after pressing the Ausgleßöffnung and turning the rotary lid on the pouring at raised at its opposite end of the Eindrückspitze Aufdrücklasche down in one Notch of the can lid is so latched that brought into its closed rotational position rotary lid is additionally pressed by the Eindrückspitze the Aufdrücklasche to the pouring opening limiting edge of the lid. Also by this measure, a largely secure sealing of the rotary cover is already achieved in the closed rotational position relative to the can lid.

The aforementioned support is preferably formed integrally with the Aufdrücklasche for manufacturing reasons and partially punched out of this. To facilitate the bending of the support of the push-on tab, the support can at its end facing away from the rivet on a Umbuglinie be connected to the push-on tab. For effective latching of the push tab into the lock position, the length of the support is less than about half the length of the push tab and greater than about one third of the length of the push tab. The catch of the can lid, which in all embodiments is preferably provided underneath the press-on tab on the can lid, for example as a rib or as a groove, is in this case about half to one third of the length of the push-on tab, viewed from the end of the push-on tab , In the latched locking position, the angle of the raised Aufdrücklasche to the plane of the can lid mirror is preferably between about 30 and 45 °.

The push-on tab can be attached to the rivet via a fastening tab punched out in some areas from the push-on tab material.

For the sake of simplicity, the rivet and / or the catch are integrally formed from the material of the can lid.

In a further development of the invention, it is provided that in the can lid a guide groove for receiving an expression on the underside of the rotary lid is provided. In this way, the rotary lid can be reliably guided out of its - with respect to the pouring opening - rear opening rotational position in its front locking rotational position, whereby handling is facilitated.

The rotary cover may near the rivet, next to this or on the opposite side of the indenting, have reinforcing beads to better withstand the material stress there.

The simplification of the operation when closing the pouring opening may further comprise the can lid a stop for the rotary lid in the closed rotational position.

The sealing function can be further improved if the rotary cover is at least partially coated, for example on the inside of its edge region.

It also serves to simplify the operation when the outer edge of the rotary lid has one or more wings or similar gripping areas, so that the rotary lid can be grasped more easily for rotation.

The choice of material is in particular to be made so that the material thickness of the can lid preferably between 0.1 and 0.3 mm, in particular at about 0.224 mm, the material thickness of the Aufdrücklasche preferably between 0.15 and 0.35 mm, in particular about 0.265 mm and the material thickness of the rotary cover is preferably between 0.05 and 0.15 mm, in particular about 0.1 mm. For example, the material may be rolled aluminum, optionally with a clearcoat finish.

The invention further relates to a can lid with the above-described closure and to a beverage can with a thus-equipped can lid.

Embodiments of the invention will be explained in more detail in the following description with reference to the drawing.

Fig. 1a

in Aufsicht, im Schnitt und im Detailschnitt einen die Erfindung aufweisenden Getränkedosendeckelverschluss, wobei sich die Schnappscheibe des Drehdeckels in Verschlussdrehlage in einem ersten Biegezustand befindet,

Fig. 1 b

Darstellungen entsprechend Figur 1a, bei welcher sich die Schnappscheibe des Drehdeckels in einem zweiten Biegezustand befindet, wobei gegenüber Figur 1a die Betätigungsweise zur Überführung der Schnappscheibe von ihrem ersten Biegezustand in ihren zweiten Biegezustand veranschaulicht ist,

Fig. 1 c

Darstellungen entsprechend Figur 1b und

Fig. 1d

Darstellungen entsprechend Figur 1a, wobei gegenüber Figur 1c veranschaulicht ist, wie die Schnappscheibe von ihrem zweiten Biegezustand in ihren ersten Biegezustand zurückgebracht wird.

Fig. 2a

eine schematische Seitenansicht eines auf einen etwa zylindrischen Dosenkörper aufgebörtelten mit einem die Erfindung gemäß einer weiteren Ausführung aufweisenden Verschlusssystem bei in Verschlussdrehstellung gebrachtem Drehdeckel und in Raststellung gebrachter Stütze, und

Fig. 2b

eine Draufsicht auf einen Dosendeckel, wobei sich der Drehdeckel in Öffnungsdrehstellung befindet.

Show it:

Fig. 1a

in plan view, in section and in detail section of a beverage can lid closure according to the invention, wherein the snap disc of the rotary lid is in the closed rotational position in a first bending state,

Fig. 1 b

Representations accordingly FIG. 1a in which the snap disc of the rotary lid is in a second bending state, with respect to FIG. 1a the mode of operation for transferring the snap disc from its first bending state to its second bending state is illustrated,

Fig. 1 c

Representations accordingly FIG. 1b and

Fig. 1d

Representations accordingly FIG. 1a , being opposite Figure 1c it is illustrated how the snap disc is returned from its second bending state to its first bending state.

Fig. 2a

a schematic side view of one on an approximately cylindrical can body zutätelten with a the invention according to a further embodiment having closure system in rotary closure position brought rotary lid and placed in detent position support, and

Fig. 2b

a plan view of a can lid, wherein the rotary lid is in the opening rotational position.

With the invented closure system according to the FIGS. 1a to 1d can be beverage cans with a pouring opening designed as a Eindrücköffnung 7 reseal. The can lid D, which is permanently mortared, for example, on the upper end of an approximately cylindrical can body K, has a rivet 5, on which a rotary lid 2 is rotatably mounted from an opening rotational position in a closed rotational position above the pouring port 7 and back again. In the FIGS. 1a to 1d the rotary cover 2 is in each case in its closed rotational position above the pouring opening 7, which has been previously released, for example by utilizing material weakening lines.

The rotary cover 2 is at least partially formed as a curved snap-action disc S, which can be converted by a force acting perpendicular to the lid mirror plane from a stable first bending state by bending and after overcoming a pressure point in a stable second bending state in which the outer edge 10 of the rotary cover 2 to the the pouring opening 7 limiting lid edge 9 applies a closing pressure and from which the snap-action disc S jumps by renewed force in their first bending state, as shown in the FIGS. 1a to 1d is illustrated in turn. In the in the FIGS. 1a to 1d illustrated embodiment, the snap disc S takes the essential part of the pouring opening 7 and is adapted in its outer contour of the inner edge contour of the pouring opening 7, namely special circular.

The rotary lid 2 overlaps the pouring opening 7 limiting lid edge 9 slightly. When comparing the FIGS. 1a and 1b is clarified that according to FIG. 1a initially with little play in the pouring opening 7 fitting snap disk portion of the rotary cover 2 after bending down according to FIG. 1b circumferentially sealed at the pouring opening 7 limiting lid edge 9 is pressed.

The rotary lid 2 is attached to the rivet 5 of the can lid D with a fastening tab 8. Seen from the snap-action disc S, the fastening tab 8 is extended beyond the rivet 5 by an opposing actuating portion 15. As if from a comparison of Figures 1c and 1d it can be seen, the snap disc S can be converted by pressure from the top of the actuating portion 15 again from its second tightly closing bending state in the first bending state in which the rotary cover 2 can be easily rotated to release the pouring opening 7.

With the invented closure system according to FIGS. 2a and 2b Can beverage cans with a trained as Eindrücköffnung pouring 7 even more reliable close again. The can lid D, which is permanently mortared, for example, on the upper end of an approximately cylindrical can body K, a Aufdrücklasche 1 is connected via a formed on the can lid D rivet 5 by means of fastening tab 8 in the usual way. On the same rivet 5 and a rotary lid 2 is rotatably mounted to the rivets 5 of the can lid D, so that this after opening the pouring opening 7 by lifting the Aufdrücklasche 1 at its end facing away from the pouring opening 7 and by pressing the front Eindrückspitze 6 on the pre-stamped lid closure area can be brought into the closed rotational position. After turning the rotary cover 2 from the in FIG. 2b illustrated opening rotational position in the in FIG. 1 shown closure rotational position under the leadership of an expression 12 on the underside of the rotary lid 2 in a guide groove 11 of the can lid D to the stop 14 of the can lid D can from the outer end of the Aufdrücklasche 1 there hinged hinged support 3 in the direction of the can lid D and in a detent position on a notch 4 of the can lid D are brought. In this locking position, the push-on tab 1 presses with its front indenting tip 6 on the rotary cover 2, which is in the closed rotational position, in order to securely and largely seal it at the spout 7 delimiting it Cover edge 9 to keep under the spring bias of Andrücklasche 1 and the support 3.

In FIG. 1 is indicated by dashed lines, that the rotary lid 2 is partially formed as a snap-action disc S, which can be transferred by force F perpendicular to the lid mirror plane from an upper stable bending state - after overcoming a pressure point - in a lower bending state, in which latter the outer edge the rotating lid 2 is pressed more strongly against the lid edge 9 delimiting the pouring opening 7 than before to produce a sealed closure. The deflection of the snap disc S upward in the initial bending state may be stronger than the deflection of the snap disc S down in the second stable bending state, so that the diameter of the rotary cover 2 in the latter second bending state is slightly larger than in the first bending state, in which the snap disc is arched upwards. By pressing again on the snap disc area of the rotary lid 2 perpendicular to the lid mirror plane, the snap-action disc S can snap back into its upwardly curved initial position.

After drinking from the beverage can, this can be easily reclosed, so that insects and dirt can not penetrate into the inside of the can and due to reliable sealing can not leak out of the can of cans, for example. stowed in a backpack. To reopen the Aufdrücklasche 1 can be easily turned to the side until the support 3 solves the grid 4 and the rotary cover 2 can be transferred after snapping back the snap disc S in its upwardly curved initial position back to its opening rotational position.

The pouring opening 7 is circular in the illustrated case, but it can also oval, trapezoidal with optionally rounded corners or other

In particular, the rotary cover 2 (in a manner not shown) at its outer edge 10 have one or more wings or the like handle elements, so that the rotary cover 2 can be detected to rotate easier.

The material thickness of the Aufdrücklasche 1 may be slightly larger than that of the can lid D, that of the rotary lid 2 is slightly less than that of the can lid D.

LIST OF REFERENCE NUMBERS

1. 1 push-on tab
2. 2 rotating lids
3. 3 support
4. 4 catch
5. 5 rivets
6. 6 indenting tip
7. 7 pouring opening
8. 8 fastening strap
9. 9 lid margin
10. 10 outer edge of the rotary lid
11. 11 guide groove
12. 12 expression
13. 13 reinforcement beads
14. 14 stop
15. 15 operating section

D

can end

F

force

K

can body

S

snap disk

Claims (16)

1. Closure for a drinks can having a lid which is transferrable from an open position to a closed position over a pour-out opening (7) of the can lid (D) and back again and which is formed at least regionally as a curved disc which, by application of force perpendicular to the mirror plane of the lid, is transferrable by bending from a stable first bending state to a stable second bending state in which the outer rim (10) of the lid comes to bear with a closing pressure against the lid rim (9) adjoining the pour-out opening and from which the disc is transferrable back into its first bending state by renewed application of force, characterized in that the lid is fastened as a rotary lid (2) to a rivet (5) on the can lid (D) such as to be rotatable from an open rotational position into a closed rotational position over the pour-out opening (7) and back again, in that the disc is in the form of a snap dome (S) which is at least regionally curved and which, by application of force perpendicular to the mirror plane of the lid, is transferrable by bending from the stable first bending state to the stable second bending state after overcoming a pressure point, and from which the snap dome (S) jumps back into its first bending state by renewed application of force, and in that a push-on tab (1) that serves for opening is fastened over the rotary lid (2) to the same rivet (5) on the can lid (D) as the rotary lid (2), wherein, in its closed rotational position, the latter is held against the lid rim (9) adjoining the pour-out opening (7) by a push-in tip (6) of the push-on tab (1), which is pulled up at its end opposite the push-in tip (6) and is supported and latched with respect to the can lid (D).
2. Closure according to Claim 1, characterized in that the rotary lid (2), at least in the second bending state, engages slightly over or under the lid rim (9) adjoining the pour-out opening (7) or engages in or around said lid rim (9).
3. Closure according to Claim 1 or 2, characterized in that the rotary lid (2) is attached to the rivet (5) with a fastening tab (8) which, as seen from the snap dome (S), is extended beyond the rivet (5) by an opposite actuating portion (15).
4. Closure according to one of Claims 1 to 3, characterized in that at that end of the push-on tab (1) that is opposite the push-in tip (6) there is articulated a support (3) which, after the pour-out opening (7) has been pushed on and the rotary lid (2) has been rotated over the pour-out opening (7) and with the push-on tab (1) pulled up at its end opposite the push-in tip (6), is latchable downwardly into a catch (4) on the can lid (D) such that the rotary lid (2) which has been moved into its closed rotational position is pushed by the push-in tip (6) of the push-on tab (1) against the lid rim (9) adjoining the pour-out opening (7).
5. Closure according to Claim 4, characterized in that the support (3) is formed integrally with the push-on tab (1) and is punched regionally out of the latter, and/or in that the support (3), at its end remote from the rivet (5), is connected to the push-on tab (1) via a bending line, and/or in that the length of the support (3) is less than about half the length of the push-on tab (1) and greater than about a third of the length of the push-on tab (1), and/or in that the angle of the push-on tab (1) with respect to the plane of the mirror in the latched closed position is between about 30° and 45°.
6. Closure according to one of the preceding claims, characterized in that the push-on tab (1) is attached to the rivet (5) via a fastening tab punched regionally out of the material of the push-on tab.
7. Closure according to one of the preceding claims, characterized in that the rivet (5) and/or the catch (4) is/are integrally formed from the material of the can lid (D).
8. Closure according to one of the preceding claims, characterized in that the outer rim (10) of the rotary lid (2) and the lid rim (9) adjoining the pour-out opening (7) have a press fit.
9. Closure according to one of the preceding claims, characterized in that a guide groove (11) for receiving a protuberance (12) on the underside of the rotary lid (2) is provided in the can lid (3).
10. Closure according to one of the preceding claims, characterized in that, close to the rivet (5), the rotary lid (2) has reinforcing ridges (13) next to the rivet (5) or at the side opposite the push-in tip (6).
11. Closure according to one of the preceding claims, characterized in that the can lid (D) has a stop (14) for the rotary lid (2) in its closed rotational position.
12. Closure according to one of the preceding claims, characterized in that the rotary lid (2) is coated at least regionally with sealant.
13. Closure according to one of the preceding claims, characterized in that the outer rim (10) of the rotary lid (2) has one or more wings or similar easily graspable projections.
14. Closure according to one of the preceding claims, characterized in that the material thickness of the can lid (D) is preferably between 0.1 and 0.3 mm, in particular about 0.224 mm, and/or in that the material thickness of the push-on tab (1) is preferably between 0.15 and 0.35 mm, in particular about 0.265 mm, and/or in that the material thickness of the rotary lid (2) is preferably between 0.05 and 0.15 mm, in particular about 0.1 mm.
15. Can lid having a closure according to one of Claims 1 to 14.
16. Can having a can lid according to Claim 15.

Images