DE102021205228B4 - Lid for a beverage can - Google Patents

Abstract

The present invention relates to a lid (5) for a beverage can (1), the lid (5) having a closed lid surface (7), an inner flange (29) for sealing contact with the beverage can and a collar (9 ), wherein the collar (9) has a number n ≥ 10 of circumferentially distributed teeth (13) which protrude radially inwards towards the inner flange (29), the teeth (13) each extending in the circumferential direction over an angular width α and adjacent teeth (13) have an angular center-to-center distance β from one another, where the ratio V=βα of the angular center-to-center distance β to the angular width α is: 3 ≤ V ≤ 16.

Description

The present invention relates to a lid for a beverage can, in particular for a beverage can with a typical standard size for a 330 ml or 500 ml beverage. The lid disclosed here can, however, also be used for other beverage cans, such as 250 ml cans or cans of other sizes.

Beverage cans have the disadvantage that they usually cannot be closed again after being opened for the first time. This has the disadvantage that they will leak if they are accidentally knocked over. In addition, insects or other contaminants can get into the can once it is opened. When consuming drinks from cans in company, there is the problem that additives, such as knockout drops, can be filled into an opened can without being noticed. In addition, a carbonated drink constantly loses carbon dioxide when the can is open and becomes stale. Finally, there is a need to be able to assign opened beverage cans to a person.

The present invention is therefore based on the object of providing a lid for a beverage can which can easily and securely close the beverage can and which is securely and tightly closed even if it is overturned when filled with a carbonated beverage.

This object is achieved with a cover according to claim 1. Advantageous embodiments of the invention can be found in the subclaims, the description and the figures.

von Winkelmittenabstand β zur Winkelbreite α gilt: 3 ≤ V ≤ 8. Erfindungsgemäß kann der Bereich für das Verhältnis $V=\frac{\beta }{\alpha }$

dadurch auf einen Bereich von 3 ≤ V ≤ 16 vergrößert werden, dass der Deckel einen Innenflansch zur dichtenden Anlage mit der Getränkedose aufweist. Der Kragen verläuft dabei außenseitig vom Innenflansch und die Zähne erstrecken sich radial nach innen zum Innenflansch hin, sodass ein Kragenwulst der Getränkedose unter zwischenzeitlicher Verformung des Kragens und/oder der Zähne zwischen den Innenflansch und den Kragen passt.According to the present invention, a lid for a beverage can is provided, the lid having a closed lid surface and a circumferential collar. The collar has a number n ≥ 10 of circumferentially distributed teeth that protrude radially inward, the teeth each extending in the circumferential direction over an angular width α and adjacent teeth have an angular center distance β from one another, with for the ratio $V=\frac{\beta }{\alpha }$

From the angular center-to-center distance β to the angular width α, the following applies: 3 V 8. According to the invention, the range for the ratio $V=\frac{\beta }{\alpha }$

can be enlarged to a range of 3 V 16 in that the lid has an inner flange for sealing contact with the beverage can. The collar runs on the outside from the inner flange and the teeth extend radially inward towards the inner flange, so that a collar bead of the beverage can fits between the inner flange and the collar with an intermittent deformation of the collar and / or the teeth.

von Winkelmittenabstand β zur Winkelbreite α im Bereich von 3 bis 8 dieses Ziel erreicht wird. Eine Zähnezahl von n=24 hat sich als besonders vorteilhaft herausgestellt, wobei der Winkelmittenabstand β 15° beträgt und die Winkelbreite α der Zähne ca. 3° beträgt. Ferner hat der Erfinder erkannt, dass mit einem Innenflansch zur dichtenden Anlage mit der Getränkedose zum einen der Bereich für das Verhältnis $V=\frac{\beta }{\alpha }$

auf einen Bereich von 3 ≤ V ≤ 16 vergrößert werden kann, d.h. die Zahnbreite kann wesentlich kleiner gewählt werden, wodurch der Deckel leichter aufsetzbar und abnehmbar ist. Der Innenflansch sorgt zudem in jedem Fall für eine verbesserte Dichtheit. Vorzugsweise liegt er umlaufend dichtend mit einer radialen Außenseite von innen dichtend an einem Kragenwulst der Getränkedose. Die Zähne können außenseitig um den Kragenwulst greifen. Somit besteht dann vorzugsweise außenseitig, oberseitig und innenseitig des Kragenswulsts der Getränkedose eine dichtende Anlage mit dem aufgesetzten Deckel.A particular technical challenge for the lid is to design the lid in such a way that it can be placed on a beverage can relatively easily, but sits so firmly on it when it is in place that the lid tightly and securely seals on the can even under the internal pressure caused by carbon dioxide Can remains. In addition, the lid should be relatively easy to remove. The inventor has realized that with a relationship $V=\frac{\beta }{\alpha }$

from the angular center-to-center distance β to the angular width α in the range from 3 to 8 this goal is achieved. A number of teeth of n = 24 has proven to be particularly advantageous, the angular center distance β being 15 ° and the angular width α of the teeth being approximately 3 °. Furthermore, the inventor has recognized that with an inner flange for sealing contact with the beverage can, on the one hand, the area for the ratio $V=\frac{\beta }{\alpha }$

can be increased to a range of 3 V 16, ie the tooth width can be selected to be significantly smaller, making the cover easier to put on and remove. The inner flange also ensures improved tightness in every case. Preferably, it is circumferentially sealing with a radial outer side sealing from the inside on a collar bead of the beverage can. The teeth can grip around the collar bead on the outside. Thus, there is then preferably a sealing contact with the attached lid on the outside, on the top and on the inside of the collar bead of the beverage can.

The teeth can preferably be arranged in n-numbered rotationally symmetrical fashion on the collar. As a result, the holding force of the lid is evenly distributed over the collar.

The collar preferably has 15 to 30 teeth. Too wide or too many teeth would make it too difficult to attach and remove the lid from a beverage can. Too narrow and too few teeth would not adequately secure the lid on a beverage can.

The cover can preferably consist in one piece of an elastic plastic material. As a result, the collar can be bent outward in a local area of approximately 2 to 6 angular center-to-center distances β and the cover can thus be pulled off in a simple manner. When the lid is placed on the beverage can, too, an elastically deformable lid has the advantage that the teeth can be pressed successively over the edge of the can and do not have to be pressed open at the same time. The collar is preferably less easily elastically expandable in the radial direction than by one Horizontal axis can be bent up elastically. The plastic material of the cover can be designed rubber-like.

The inner flange preferably extends in the axial direction away from the cover surface longer than the collar. In this way, an end face of the inner flange can axially abut a cover surface of the beverage can and there additionally form a sealing surface which additionally improves the tightness.

The inner flange preferably has a wall thickness which tapers towards an end of the inner flange facing away from the cover surface. This can make it easier to put the cover on, since the inner flange can then be deformed better when it is put on and taken off. In addition, tolerances in the shape and size of the beverage cans can be compensated to ensure a tight system.

Preferably all n teeth have the same shape and size.

Each tooth preferably tapers radially inward, preferably in the longitudinal section of the tooth.

The collar can preferably have an inner surface in the shape of a truncated cone, a normal vector on the inner surface having a radially inwardly directed vector component and a vector component directed away from the cover surface. This makes it easier to place the lid on a beverage can, since when the lid is pressed onto the beverage can, the collar expands slightly so that the teeth can grip behind a circumferential bead of the beverage can.

Each tooth preferably has a first tooth surface facing the cover surface and a second tooth surface facing away from the cover surface, the first tooth surface being inclined in such a way that a normal vector on the first tooth surface has a radially inwardly directed vector component and a vector component directed towards the cover surface wherein the second tooth surface is inclined in such a way that a normal vector on the second tooth surface has a radially inwardly directed vector component and a vector component directed orthogonally away from the cover surface. The teeth preferably have a substantially prismatic shape with a triangular longitudinal section. The inclination of the second tooth surface makes it easier to place the lid on a beverage can and the inclination of the first tooth surface makes it easier to remove the lid from the beverage can.

The second tooth surface can preferably be aligned with the frustoconical inner surface of the collar. This also simplifies the placing of the lid on the beverage can.

Preferably, the normal vector on the first tooth surface can enclose a first angle γ ₁ with a normal vector on the cover surface and the normal vector on the second tooth surface a second angle γ ₂ with the normal vector on the cover surface, the first angle γ _{1 being} smaller than the second Angle γ ₂ . The teeth preferably have a substantially triangular shape in longitudinal section, the triangle not being isosceles. The first tooth surface thus defines a somewhat steeper first flank directed towards the cover surface and the second tooth surface defines a somewhat flatter second flank directed away from the cover surface. This has the advantageous effect that removing the lid requires more force than placing the lid on the beverage can.

definiert ist, wobei α ein von den Zähnen definierter Innendurchmesser des Kragens ist. Bei gerader Zähnezahl n, die n-zählig rotationssymmetrisch angeordnet sind, haben zwei sich gegenüberliegende Zähne einen Abstand von α Der Innendurchmesser α ist kleiner als der Außendurchmesser e eines Kragenwulstes der Getränkedose, so dass die Zähne den Kragenwulst hintergreifen können. Vorzugsweise weist der Kragen eine Krageninnenfläche mit einem Innendurchmesser b auf, der größer als der Innendurchmesser α und als der Außendurchmesser e des Kragenwulstes der Getränkedose ist.The teeth can preferably extend radially inward from the collar by a radial tooth depth t, the tooth depth t being greater than a tooth width c in the circumferential direction, the tooth width c through $c=\pi a\cdot \frac{\alpha }{360°}$

is defined, where α is an inner diameter of the collar defined by the teeth. With an even number of teeth n, which are n-numbered rotationally symmetrical, two opposing teeth have a distance of α The inner diameter α is smaller than the outer diameter e of a collar bead of the beverage can, so that the teeth can engage behind the collar bead. The collar preferably has an inner collar surface with an inner diameter b which is greater than the inner diameter α and than the outer diameter e of the collar bead of the beverage can.

wobei die Zahnbreite c durch $c=\pi a\cdot \frac{\alpha }{360°}$

definiert ist. Typischerweise kann die Wandstärke d 0,8 bis 2 mm, vorzugsweise 1 mm, betragen.The collar preferably has a wall thickness d, where the following applies to the wall thickness d: $\frac{c}{1.2}<d<\frac{c}{0.7},$

where the face width c is through $c=\pi a\cdot \frac{\alpha }{360°}$

is defined. The wall thickness d can typically be 0.8 to 2 mm, preferably 1 mm.

The teeth on the collar can preferably extend over a tooth length L, the tooth length L being greater than the tooth width c in the circumferential direction. This makes the teeth particularly stable in the longitudinal direction.

The wall thickness d of the collar preferably tapers at an end of the collar facing away from the cover surface. As with this end the collar of the lid is placed on the beverage can, this has the advantage that the thinner wall thickness of the collar can be widened there more easily.

A grip tab preferably protrudes radially outward on at least one side of the collar. This grip tab can preferably be gripped between thumb and forefinger and is therefore particularly helpful when removing the lid from the beverage can. The grip tab is not required to put the lid on the beverage can.

The grip tab preferably extends in the circumferential direction over two to six angular center-to-center distances β. This has the advantage that three to seven teeth can be pulled out simultaneously from a grip behind the collar bead of the beverage can by means of the grip tab, in order to easily pull the lid off the collar bead.

The grip tab is preferably arranged at an end of the collar facing away from the cover surface.

• 1 eine Längsschnittansicht auf ein Ausführungsbeispiel eines Deckels gemäß der vorliegenden Erfindung über einer Getränkedose, wobei der Innenflansch nicht gezeigt ist;
• 2 eine Längsschnittansicht auf ein Ausführungsbeispiel eines Deckels gemäß der vorliegenden Erfindung aufgesetzt auf eine Getränkedose;
• 3a-e verschiedene Ansichten auf ein Ausführungsbeispiel eines Deckels gemäß der vorliegenden Erfindung, wobei der Innenflansch nicht gezeigt ist;
• 4 eine Detailansicht im Längsschnitt auf ein Ausführungsbeispiel eines Deckels gemäß der vorliegenden Erfindung, wobei der Innenflansch nicht gezeigt ist; und
• 5a-e verschiedene Ansichten auf ein weiteres Ausführungsbeispiel eines Deckels gemäß der vorliegenden Erfindung, wobei der Innenflansch gezeigt ist.

The present invention is explained in more detail with reference to the accompanying figures. Show it

• 1 a longitudinal sectional view of an embodiment of a lid according to the present invention over a beverage can, wherein the inner flange is not shown;
• 2 a longitudinal sectional view of an embodiment of a lid according to the present invention placed on a beverage can;
• 3a-e various views of an embodiment of a cover according to the present invention, wherein the inner flange is not shown;
• 4th a detailed view in longitudinal section of an embodiment of a cover according to the present invention, wherein the inner flange is not shown; and
• 5a-e various views of a further embodiment of a cover according to the present invention, wherein the inner flange is shown.

1 shows a beverage can 1 with a collar bead 3 which runs around an opening (not shown) on the top. A lid 5 is shown above the collar bead 3, which here has an outer diameter e, with which the opened can 1 can be tightly closed. The lid 5 is made of an elastic plastic material and can be slipped over the collar bead 3 of the beverage can 1 in order to close the beverage can 1 in a sealing manner. In 2 the lid 5 is shown in the attached position. The cover has a closed, essentially circular cover surface 7 and a circumferential collar 9, the collar 9 running essentially in the shape of a cylinder jacket at the edge of the cover surface 7. A plurality of circumferentially distributed teeth 13 protrude radially inward from a radial inner surface 11 of the collar 9. In the exemplary embodiment shown here, the number n of teeth 13 is 24. As in FIG 2 shown, the n = 24 teeth engage behind the collar bead 3 of the beverage can 1 when the lid 5 is in place. The lid 5 holds tightly and securely sealingly on the beverage can 1, even if the can is accidentally overturned Can with attached lid 5 does not leak.

von Winkelmittenabstand β zur Winkelbreite α in diesem Ausführungsbeispiel 5 beträgt. Erfindungsgemäß kann dieses Verhältnis im Bereich von 3 bis 8 liegen, in Verbindung mit einem Innenflansch gemäß 5a-e sogar in einem Bereich von 3 bis 16. Hier beträgt β 15° und α in etwa 3°.In 3a-e the cover 5 is shown in more detail in different views. 3a Figure 13 shows a perspective bottom view and 3b shows a perspective top view. 3c shows a bottom view, 3d shows a side view and 3e FIG. 11 shows a sectional view through the plane AA, which is shown in FIG 3c is shown. The 24 teeth 13 are rotationally symmetrically arranged in 24 numbers on the radial inner surface 11 of the collar 9 and protrude radially inward. The teeth 13 each extend in the circumferential direction over an angular width α, with adjacent teeth 13 having an angular center-to-center distance β from one another which, in this exemplary embodiment, is approximately five times as large as the angular width α. That is, the ratio $V=\frac{\beta }{\alpha }$

from the angular center distance β to the angular width α in this exemplary embodiment is 5. According to the invention, this ratio can be in the range from 3 to 8, in conjunction with an inner flange according to FIG 5a-e even in a range from 3 to 16. Here, β is 15 ° and α is approximately 3 °.

also hier etwa 1,38 mm. Wie in 3e gezeigt, kann der Kragen 9 eine Wandstärke d aufweisen, welche im Bereich von $\frac{c}{\mathrm{1,2}}$

bis $\frac{c}{\mathrm{0,7}}$

liegen kann, vorzugsweise etwa im Bereich zwischen 0,8 mm bis 2 mm.The teeth 13 protruding radially inward define a minimum inner diameter α of the collar 9, which in this exemplary embodiment is 52.6 mm. This is somewhat smaller than the outer diameter e of the collar bead 3 of the beverage can 1, the outer diameter e of a typical 330 ml or 500 ml beverage can being 53.8 mm. As a result, the teeth 13 can safely engage behind the collar bead 3 of the beverage can 1. The radial inner surface 11 of the collar 9 has an inner radius b = 54.2 mm, so that the collar 9 can enclose the collar bead 3 of the beverage can 1. A face width c results from this geometry $c=\pi a\cdot \frac{\alpha }{360°},$

so here about 1.38 mm. As in 3e shown, the collar 9 can have a wall thickness d which is in the range of $\frac{c}{1.2}$

until $\frac{c}{0.7}$

can be, preferably approximately in the range between 0.8 mm to 2 mm.

0,8 mm. In Längsrichtung der Getränkedose 1 erstrecken sich die Zähne 13 am Kragen 9 über eine Zahnlänge L, wobei die Zahnlänge L größer ist als die Zahnbreite c in Umfangsrichtung. Außerdem verjüngen sich die Zähne 13 im Längsschnitt radial nach innen hin. Dadurch ergibt sich für die Zähne 13 eine prismenförmige Form, die im Längsschnitt dreiecksförmig ist mit abgerundeter nach radial innen gerichteter Spitze. Jeder Zahn 13 weist dabei eine der Deckelfläche 7 zugewandte erste Zahnfläche 15 und eine von der Deckelfläche 7 abgewandte zweite Zahnfläche 17 auf, wobei die erste Zahnfläche 15 derart geneigt ist, dass ein Normalenvektor 19 auf der ersten Zahnfläche 15 eine radial nach innen gerichtete Vektorkomponente und eine von der Deckelfläche 7 weg gerichtete Vektorkomponente aufweist. Die zweite Zahnfläche 17 ist dagegen derart geneigt, dass ein Normalenvektor 21 auf der zweiten Zahnfläche 17 eine radial nach innen gerichtete Vektorkomponente und eine auf die Deckelfläche 7 zu gerichtete Vektorkomponente aufweist. Der Normalenvektor 19 auf der ersten Zahnfläche 15 schließt mit einem Normalenvektor 23 auf der Deckelfläche 7 einen ersten Winkel γ₁ ein und der Normalenvektor 21 auf der zweiten Zahnfläche 17 schließt mit dem Normalenvektor 23 auf der Deckelfläche 7 einen zweiten Winkel γ₂ ein, wobei der erste Winkel γ₁ kleiner ist als der zweite Winkel γ₂. Dadurch ergibt sich im Längsschnitt eine nicht gleichschenklige Dreiecksform der Zähne 13, wobei eine zur Deckelfläche 7 hin gerichtete steilere erste Zahnflanke von der ersten Zahnfläche 15 gebildet wird. Analog wird von der zweiten Zahnfläche 17 eine von der Deckelfläche 7 weg gerichtete zweite etwas flachere Zahnflanke gebildet. Dadurch sind die Kräfte, die aufgebracht werden müssen, um den Deckel 5 auf die Getränkedose 1 aufzusetzen und abzuziehen unterschiedlich groß. Das Aufsetzen erfordert durch die flacheren zweiten Zahnflanken weniger Kraft als das Abziehen des Deckels 5 von der Getränkedose 1. Die steileren ersten Zahnflanken hintergreifen die Kragenwulst 3 der Getränkedose 1 entsprechend sicher und verhindern, dass der auch bei kohlensäurebedingtem Innen­
druck in der Getränkedose 1 der Deckel 5 von der Getränkedose 1 weggedrückt wird.Each of the teeth 13 extends radially inward from the collar 9 by a radial tooth depth t, the tooth depth t being greater than the tooth width c in the circumferential direction. In this case the tooth depth is $t=\frac{b-a}{2}=0.8\text{mm}.$

0.8 mm. In the longitudinal direction of the beverage can 1, the teeth 13 on the collar 9 extend over a tooth length L, the tooth length L being greater than the tooth width c in the circumferential direction. In addition, the teeth 13 taper radially inward in a longitudinal section. This results in a prismatic shape for the teeth 13 which is triangular in longitudinal section with a rounded tip directed radially inward. Each tooth 13 has a first tooth surface 15 facing the top surface 7 and a second tooth surface 17 facing away from the top surface 7, the first tooth surface 15 being inclined in such a way that a normal vector 19 on the first tooth surface 15 has a radially inwardly directed vector component and has a vector component directed away from the cover surface 7. The second tooth surface 17, on the other hand, is inclined in such a way that a normal vector 21 on the second tooth surface 17 has a vector component directed radially inward and a vector component directed towards the cover surface 7. The normal vector 19 on the first tooth surface 15 forms a first angle γ ₁ with a normal vector 23 on the cover surface 7 and the normal vector 21 on the second tooth surface 17 forms a second angle γ ₂ with the normal vector 23 on the cover surface 7, the first angle γ _{1 is} smaller than the second angle γ ₂ . This results in a non-isosceles triangular shape of the teeth 13 in the longitudinal section, a steeper first tooth flank directed towards the cover surface 7 being formed by the first tooth surface 15. Analogously, a second, somewhat flatter tooth flank directed away from the cover surface 7 is formed by the second tooth surface 17. As a result, the forces that have to be applied in order to place the lid 5 on the beverage can 1 and remove it are of different sizes. Due to the flatter second tooth flanks, putting on requires less force than pulling off the lid 5 from the beverage can 1. The steeper first tooth flanks engage behind the collar bead 3 of the beverage can 1 accordingly and prevent the inside from being exposed to carbon dioxide
pressure in the beverage can 1, the lid 5 is pushed away from the beverage can 1.

To simplify the placing of the lid 5 on the beverage can 1, the collar 9 has an inner surface 25 shaped like a truncated cone, the inner surface 25 being inclined in such a way that it is flush with the second tooth surface 17. This means that half the opening angle of the frustoconical jacket-shaped inner surface 25 is equal to the second angle γ ₂ . Through the inner surface 25, which can also be curved in longitudinal section, the wall thickness d tapers at the end of the collar 9 facing away from the cover surface 7, whereby a radial widening of the collar 9 for the more convenient placing of the cover 5 on the beverage can 1 is achieved will.

The cover surface 7 here has a wall thickness f which is greater than the wall thickness d of the collar 9, at least in an inner region of the cover surface 7.

As an opening aid, the cover 5 has a grip tab 27 on one side of the collar 9, which protrudes radially outward and can be easily gripped with the index finger and thumb. The grip tab 27 is arranged in longitudinal section at the end of the collar 9 facing away from the cover surface 7 and extends in the circumferential direction over five angular center distances β, as in FIG 3c evident. As a result, by pulling the tab 27 radially outward, a plurality of five teeth 13 can be pulled out of the rear grip with the collar bead 3 of the beverage can 1 in order to then pull it upwards from the collar bead 3, which then successively follow the other teeth. The lid 5 is put on in the reverse order by pressing the edge area of the lid surface 7 flat onto the beaded collar 3 of the beverage can 1.

In 4th a detailed view of the cover 5 is shown even larger in order to clarify the relative dimensions to one another. A lower end of the teeth 13 has a lower axial tooth spacing g from a lower edge of the inner surface 25, which is preferably smaller than the wall thickness d of the collar 9. An upper end of the teeth 13 has an upper axial tooth spacing h from an upper side of the cover surface 7, which is preferably greater than the tooth length L. In a radial outer region, the cover surface 7 has a wall thickness which corresponds to the wall thickness d of the collar 9. In a radial inner area, the cover surface 7 has a wall thickness f which is greater than the wall thickness d of the collar 9. For example, the dimensions can be as follows: d = 1 mm, f = 1.2 mm, L = 1.8 mm, g = 0.8 mm, h = 3.1 mm.

von Winkelmittenabstand β zur Winkelbreite α in diesem Ausführungsbeispiel mehr als 8 beträgt. Hier beträgt β 15° und α in etwa 1,7°. Dies ist vorteilhaft, um das Aufsetzen und Abnehmen des Deckels 5 auf die Getränkedose 1 zu erleichtern.In 5a-e Another embodiment of the cover 5 is shown in more detail in different views. 5a shows a bottom view and 5b shows a side view. 5c shows a cross-section through the in 5a level AA shown, 5d Figure 13 shows a perspective bottom view and 5e shows a perspective top view. In this exemplary embodiment, too, the cover 5 has a number of 24 teeth 13, which are arranged in 24-numbered rotationally symmetrical fashion on the radial inner surface 11 of the collar 9 and project radially inward. However, the face width c is much smaller here, so that the ratio $V=\frac{\beta }{\alpha }$

from the angular center distance β to the angular width α in this embodiment is more than 8. Here β is 15 ° and α is around 1.7 °. This is advantageous in order to make it easier to put the lid 5 on and remove it from the beverage can 1.

Since the thinner teeth 13 are in principle disadvantageous for the tightness, the cover 5 has an inner flange 29. The inner flange 29 extends in the form of a ring-shaped circumferential web axially downward away from the cover surface 7 in order to come into contact with the collar bead 3 of the beverage can 1 from the inside in a sealing manner. The inner flange 29 here on the cover surface 7 has an inner flange thickness d 'of 1.2 mm and tapers towards the bottom. The inner flange 29 extends axially over an inner flange length k ′ which is longer than a collar length k of the collar 9. The inner flange 29 thus projects downward from the cover 5 by k'-k. The inner diameter a 'of the inner flange 29 is 45.4 mm on the lid surface 7, the outer diameter of the inner flange 29 is 47.8 mm on the lid surface 7. The inner flange 29 creates a further sealing surface with the beverage can 1 to which the To compensate thinner teeth 13 caused lower tightness and to achieve overall better tightness. It goes without saying that the inner flange 29 also improves the tightness in the case of thicker teeth 13, for example according to the exemplary embodiment in FIG 3-e . Therefore, the inner flange 29 is advantageous in any case.

The grip tab 27 has in the embodiment according to 5a-e a hole 31 in order to be able to hang up the cover 5, for example on a band, a chain or a pendant. This is particularly useful, for example, in order to attach the cover 5 in a captive manner in an area of a cup holder in a vehicle or aircraft. In addition, the tab 27 can be used to apply branding 33 as shown. This can, for example, not only be visually recognizable, but also haptically perceptible as a three-dimensional formation from the cover material when the grip tab 29 is gripped. An upper side of the cover surface 7 can be completely available for any color and / or motif design, for example also as an advertising or information surface. For this purpose, the top of the cover surface 7 can be offset upwards by a shoulder f '(here 0.2 mm), so that the wall thickness of the cover surface f (here 1.2 mm) is. Of course, the grip tab 27 with hole 31 and / or brand lettering 33 is also in combination with the exemplary embodiment according to FIG 3a-e sensible.

List of reference symbols

1

Beverage can

3

Collar bulge

5

lid

7th

Lid surface

9

collar

11th

Inner surface

13th

teeth

15th

first tooth surface

17th

second tooth surface

19th

Normal vector on first tooth surface

21

Normal vector on the second tooth surface

23

Normal vector on top surface

25th

Inner surface

27

Grip tab

29

Inner flange

31

hole

33

Brand lettering

α

minimum inside diameter of the collar

α '

Inner diameter of the inner flange

b

Inside diameter of the inside surface of the collar

c

Face width

d

Wall thickness of the collar

d '

Wall thickness of the inner flange

e

Outside diameter of the collar bulge

f

Wall thickness of the cover surface

f '

Shoulder of the lid surface

G

lower tooth spacing

H

upper tooth spacing

k

Collar length

k '

Inner flange length

L.

Tooth length

T

Tooth depth

α

Angular width of the teeth

β

Angular center-to-center distance of the teeth

γ1

first angle

γ2

second angle

Claims (20)

Lid (5) for a beverage can (1), the lid (5) having a closed lid surface (7), an inner flange (29) for sealing contact with the beverage can (1) and a collar ( 9), the collar (9) having a number n ≥ 10 of circumferentially distributed teeth (13) which protrude radially inward towards the inner flange (29), the teeth (13) each extending over an angular width α in the circumferential direction extend and adjacent teeth (13) have an angular center-to-center distance β from one another, where for the ratio $V=\frac{\beta }{\alpha }$

From the angular center distance β to the angular width α, the following applies: 3 ≤ V ≤ 16. Cover (5) Claim 1 , wherein the teeth (13) are n-numbered rotationally symmetrical. Cover (5) Claim 1 or 2 , where for the number n of teeth (13) applies: 15 ≤ n ≤ 30. Lid (5) according to one of the preceding claims, wherein the lid (5) consists in one piece of an elastic plastic material. Lid (5) according to one of the preceding claims, wherein the inner flange (29) extends in the axial direction away from the lid surface (7) longer than the collar (9). Lid (5) according to one of the preceding claims, wherein the inner flange (29) has a wall thickness (d ') which tapers towards an end of the inner flange (29) facing away from the lid surface (7). Lid (5) according to one of the preceding claims, wherein all n teeth (13) have the same shape and size. Lid (5) according to one of the preceding claims, wherein each tooth (13) tapers radially inward in longitudinal section. Lid (5) according to one of the preceding claims, wherein the collar (9) has a frustoconical jacket-shaped inner surface (25), a normal vector on the inner surface (11), a radially inwardly directed vector component and a vector component directed away from the lid surface (7) having. Lid (5) according to one of the preceding claims, wherein each tooth (13) has a first tooth surface (15) facing the lid surface (7) and a second tooth surface (17) facing away from the lid surface (7), the first tooth surface (15 ) is inclined in such a way that a normal vector (19) on the first tooth surface (15) has a radially inwardly directed vector component and a vector component directed towards the cover surface (7), the second tooth surface (17) being inclined such that a Normal vector (21) on the second tooth surface (17) has a vector component directed radially inward and a vector component directed away from the cover surface (7). Cover (5) Claim 9 and 10 , wherein the second tooth surface (17) is aligned with the frustoconical jacket-shaped inner surface (25) of the collar (9). Cover (5) Claim 10 or 11th , the normal vector (19) on the first tooth surface (15) having a first angle y ₁ with a normal vector (23) on the cover surface (7) and the normal vector (21) on the second tooth surface (17) having a second angle γ ₂ encloses the normal vector (23) on the cover surface (7), the first angle γ _{1 being} smaller than the second angle γ ₂ . Lid (5) according to one of the preceding claims, wherein the teeth (13) extend radially inward from the collar (9) by a radial tooth depth t, the tooth depth t being greater than a tooth width c in the circumferential direction, the tooth width c through c = $c=\pi a\cdot \frac{\alpha }{360°}$

is defined, where α is an inner diameter of the collar (9) defined by the teeth (13). Lid (5) according to one of the preceding claims, wherein the collar (9) has a wall thickness d, where d applies to the wall thickness $\frac{c}{1.2}\le d\le \frac{c}{0.7},$

where the face width c is through $c=\pi a\cdot \frac{\alpha }{360°}$

is defined, where α is an inner diameter of the collar (9) defined by the teeth (13). Lid (5) according to one of the preceding claims, wherein the teeth (13) on the collar (9) extend over a tooth length L, the tooth length L being greater than a tooth width c in the circumferential direction, the tooth width c through $c=\pi a\cdot \frac{\alpha }{360°}$

is defined, where α is an inner diameter of the collar (9) defined by the teeth (13). Lid (5) according to one of the preceding claims, wherein the collar (9) has a wall thickness d which tapers towards an end of the collar (9) facing away from the lid surface (7). Lid (5) according to one of the preceding claims, wherein the lid surface (7) has a wall thickness f which, at least in an inner region of the lid surface (7), is greater than the wall thickness d of the collar (9). Lid (5) according to one of the preceding claims, wherein a gripping tab (27) protrudes radially outward on at least one side of the collar (9). Cover (5) Claim 18 , wherein the at least one grip tab (27) extends in the circumferential direction over two to six angular center-to-center distances β. Cover (5) Claim 18 or 19th , wherein the at least one grip tab (27) is arranged on an end of the collar (9) facing away from the cover surface (7).

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