EP1966054B1 - Container with lid for packaging pourable products - Google Patents

Abstract

A container having a hull which has a primary opening which is closed by a first cover element, in which the top of the container/can comprises a cover tongue (30) formed via a partitioning line (27), which is released after breaking out an opening. The cover tongue (30) has a recessed bead (32) and an adjacent raised bead (36), in which the oblique surface is comprised of at least one section of a side-piece (33) of the recessed piece, and at least one section of the side-piece (37) of the raised bead : Independent claims are included for the following: (1) (A) A container top or cover as a drinking can (2) (B) A method for opening a can or container.

Description

The invention relates to a container having a container body, which has a primary opening which is closed by acting as a first cover element metal mirror, wherein the metal mirror comprises a defined by a dividing line cover tongue, which releases a discharge opening after breaking, and the lid tongue a Inclined surface which cooperates with a, arranged on a substantially parallel to the mirror movable opening means first projection for applying a force on the lid tongue to break the dividing line and wherein the inclined surface, at least a portion of an edge of a cover tongue arranged on the increase bead. The invention further relates to a lid for such a container and a method for opening such a container.

Such a generic container is in the WO 01/83303 A1 described. Further containers are for example in the American patents US 3,726,432 . US 5,816,427 and in the European patent EP 1 265 792 B1 disclosed. In this case, the lid of the container is designed so that a projection of a cover element is moved in the plane of the mirror and can be guided on an inclined surface on the lid tongue, so that a force extending substantially in the normal direction to the lid tongue force can be generated, whereby the metal mirror along a Dividing line breaks, so that the discharge opening is released. In such a container can therefore the today at least in disposable beverage cans often used Aufbrechring omitted, which is pivoted out of the mirror plane during the opening process and acts via a lever on the lid tongue to break up the dividing line. In such a container, however, care must be taken that the force applied by the interaction of the projection with the inclined surface force is sufficient even when a deflection of the mirror occurs to break the mirror at the dividing line. Such a deflection of the mirror can hardly be avoided, in particular in the case of disposable beverage cans used today, since the wall thicknesses of the container are very small. Such an inclined surface in the cover mirror is provided by the flank of a bead formed in the metal mirror. To ensure that the mirror breaks at the dividing line during the opening process and that the lid tongue is bent out of the mirror plane, the systemic path must be greater than the deflection of the mirror. In this respect, it is advantageous if this systemic path, ie the bead height or depth is as large as possible. However, there are limits to any extension of the bead flank serving as a ramp since, owing to the small thickness of the mirror, a great deformation of the mirror material occurs above a certain bead height or depth. Especially in the area of the dividing line, however, only limited material is available for the shaping of the inclined surface, since the area of the lid tongue is just surrounded by the dividing line.

The US 4,887,712 describes a further container in which the lid tongue comprises an inclined surface which cooperates with a projection on a lid member for releasing a dispensing opening, wherein the inclined surface is composed of a portion of a flank of a recess bead and a portion of an edge of a raised bead.

The invention has the object in a generic container, a sufficiently large force to break the mirror on the dividing line of the lid tongue and at the same time to provide easy handling of the container during the opening process.

This object is achieved in a surprisingly simple manner with a container having the features of claim 1, with an associated container lid having the features of claim 17, and with a method for opening such a container having the features of claim 18.

In this case, a container according to the invention has a lid tongue which comprises both an indentation bead and, adjacent thereto, a raised bead, wherein the oblique surface is composed of at least a portion of an edge of the recess bead and at least a portion of a flank of the raised bead.

Because the inclined surface, ie the ramp along which the projection is guided during the opening process, is composed of the flanks of two differently directed beads, ultimately a larger ramp length and thus a ramp height can be provided. The ramp height is the extension of the inclined surface parallel to the axis of the container. The adjacent shaping of a depression bead and an increase bead can compensate for deformation forces and stress that can cause the material to fold, so that with the combination of two oppositely formed beads, a greater effective ramp height can be set in comparison to the design of an elevation bead. or a recess bead on the lid tongue to provide an acting as a control surface inclined surface for the projection. Such a design of the container according to the invention is particularly suitable in those cases in which during the forming process on the lid no deep-drawing process with hold-down (fold holder) can be performed, but only a deformation of the mirror with a positive or negative mold.

A particularly compact design in the region of the lid is achieved in the inventive design of the container in that the substantially movable in the mirror plane opening means for applying a force on the lid tongue is formed as a second lid member which is disposed above the first lid member and relative to this and the container body is rotatably mounted about the axis thereof. This second lid member to which the first projection is attached is formed as a rotary valve, wherein the projection on the control surface performs a rotational movement. In order to avoid that an increased internal pressure in the container increases the force necessary for breaking the dividing line defining the lid tongue and thus the necessary ramp height, a venting means arranged on the second lid element is provided for ventilating the container before breaking the dividing line defining the lid tongue. In this way it is ensured that the container is vented before the actual breaking and exposing the discharge opening. This is particularly beneficial in those containers which contain a carbonated beverage. Since opening means and aeration means are moved simultaneously and with each other, with a single movement of an element, the container can first be vented, and subsequently the dispensing opening can be released by breaking the dividing line of the lid tongue. According to the invention, the lid tongue comprises a ventilation tongue, which is defined by a line extending on the cover tongue dividing line, wherein the venting means comprises a second projection, which cooperates with the ventilation tongue to generate a force approximately perpendicular to the mirror on the ventilation tongue in the movement of the second cover member break the dividing line of the ventilation tongue. This measure according to the invention has the advantage that despite the provision of a ventilation means, the mirror does not have to be designed to provide a further opening, since this ventilation opening is located precisely on the cover tongue, which defines the actual discharge opening. Such Design is particularly advantageous if the container is to be made resealable.

The dividing line on the first cover element for fixing the lid tongue can be formed as a line of weakness, such as a tear line, but it is also possible that the mirror is cut along the dividing line and subsequently, for example, by applying a plastic to the inside of the cover in the region of the dividing line, the cut again is closed. In the field, such a prepared dispensing opening is referred to as a "post-repair" opening. During the opening process, this plastic layer and thus the dividing line is broken in this case by the application of force to the lid tongue and subsequently bent the lid tongue inwards into the container.

The container according to the invention may comprise a container body of a particularly dimensionally stable material such as metal, plastic such as polyethylene, cardboard or a composite material. The mirror acting as the first cover element for closing the container body is usually made of metal to allow the usual forming processes for the design of the lid.

The term "bead" generally refers to a depression or elevation in the cover mirror, wherein the bead height or depth generally relates to the ground plane of the mirror.

Advantageous embodiments of the invention are specified in the subclaims.

In order to compensate as well as possible for the stresses in the material in the region of the lid tongue during the production of the oblique surface, it can be provided that the depression bead and the raised bead merge without a shoulder, wherein the transition region is formed substantially without bead bottom. In this respect, the flank of the increase bead closes directly to the flank of the recess bead, it may be useful if both flanks in the transition region have the same slope with respect to the mirror surface.

Beading width, bead flank and bead height of the recess bead or the raised bead can be adapted to the respective requirements. An oval shape in plan view can be advantageous, for example, if a projection cooperating with the bead or flank of the bead has a predetermined shape, so that the bead is adapted to this shape or to the curve which describes the projection during the opening movement.

It may be expedient for the bead depth of the recess bead to be substantially equal in magnitude to the bead height of the bead. In this case, the stresses in the mirror material resulting from the formation of the beads in the cover tongue can be compensated particularly symmetrically. The tension compensation provided by the adjacent arrangement of the raised and recessed beads also makes possible, in particular, a simplified production method of the container according to the invention in the area of the lid, since in this way the recess bead and the raised bead can each be introduced into the lid tongue in a forming process without the use of a hold-down device.

By setting predetermined flank angle of the beads can be adjusted very precisely and in dependence on, for example, the mirror material and its thickness, the power transmission to the lid tongue. It has proved to be advantageous for a conventional mirror if the depression bead and / or the elevation bead have or have a flank angle of 30 ° -70 °, in particular 40 ° -50 °, in the effective region of the inclined surface with the associated first projection. The flank angle refers to the angle of the bead flank to the ground plane of the lid tongue or to the mirror surface.

To ensure that the ventilation tongue releases the ventilation opening before breaking the dividing line of the cover tongue, it can be provided that the first projection, which is associated with the opening surface on the cover tongue, is in its initial position before breaking the dividing line of the cover tongue protrudes into the recess bead and having in this a freewheel, within which the first projection does not touch the inclined surface during the movement of the opening means in the opening direction. It may be advantageous if the arranged on the venting means second projection, which cooperates with the ventilation tongue, is arranged in its initial position before the breaking of the dividing line of the lid tongue in the immediate vicinity of the ventilation tongue. By this constructive measure it is achieved that the second projection cooperates directly with the ventilation tongue for releasing the ventilation opening during the opening movement, before the first projection interacts with the oblique surface formed by the recess and elevation bead for releasing the discharge opening. In this respect, the second projection advantageously has a freewheel during the opening movement, which is less than that of the first projection.

It may be expedient for the ventilation tongue to comprise a raised bead, which is, for example, circular in plan view.

For the connection of the mirror, which comprises the lid tongue, with the container body, various measures are conceivable. For example, the mirror may be connected to the container body by means of a fold, a bond or also a soldering.

Advantageously, the second cover element may have an off-center opening, which by the rotation of the second Cover element can be brought over the discharge opening. It may be expedient if the second cover element has substantially the same radial extent to the axis as the first cover element and is rotatable relative to the container body about its axis. In this case, the second cover element may have a circumferential annular groove which receives the container edge and / or an edge of the first cover element formed as an annular flange or annular bead. The second cover element may comprise a material of the container body and / or a material of the first cover element.

In order to make it possible to reclose the opened container, provision can be made for a sealing device to be provided between the first and the second lid element outside the dividing line of the lid tongue, in particular in the form of a bead of a sealing material circulating on the edge of the dispensing opening. On the other hand, it can also be provided that not only on one of the lid elements but on both lid elements sealingly acting seals are arranged.

In order to avoid that the first projection after breaking the dividing line of the lid tongue with continuous rotation of the opening means moves through the seal and thus damages, it can be provided that the first projection on the opening means abuts against the edge of the dispensing opening the rotation is stopped during the opening process. In particular, when the lid is designed to reclosure of the container, it may be provided that the first projection also abuts against the edge of the dispensing opening and is stopped in this way when the opening means after the opening operation again moves back to the starting position or beyond becomes.

To provide the cooperating with the inclined surface of the lid tongue first projection on the opening means in a manner easy to manufacture, it can be provided that this first projection in the form of a recess bead, in particular a recess bead is formed on the second cover element, which extends in a starting position with its bead head in a recess bead on the lid tongue inside.

As far as depression bead and increase bead of the inclined surface are oval, it may be appropriate that these are arranged to each other such that the large profile half-axes are substantially tangent to a circular path on the lid tongue. This configuration is particularly advantageous when the opening means or the second cover element is rotatably mounted about the axis of the container body.

The invention also relates to a container lid for use with a container designed as described. This container lid comprises a first and a second lid element, which may be configured as described above.

The object of the invention is also achieved by a method for opening a container with a container body made of a dimensionally stable material such as metal, PE or cardboard, which has a primary opening which is closed by a metal mirror as the first cover member, wherein the opening process to release a Dispensing opening a dividing line is broken on the mirror on which a lid tongue is fixed, and for breaking the dividing line a first, arranged on a substantially parallel to the mirror movable opening means projection is guided along an inclined surface of the lid tongue along, whereby a force substantially normal Towards the mirror is generated on the lid tongue, wherein the first projection is guided at least partially along an edge of a raised bead during the opening process. The method according to the invention is characterized in that, during the opening process, the first projection is guided, at least in sections, along an edge of a depression bead adjacent to the enlargement bead a rotation of a second, the first and a second projection having and designed as opening means lid member is performed to the first lid member, wherein for venting the container before breaking the dividing line of the lid tongue by the rotation of the second cover element one, a ventilation tongue Thus, in the opening operation together with the opening means, a vent means is moved to ventilate the container before breaking the dividing line of the lid tongue. In this case, the venting tongue is broken before breaking the lid tongue, which facilitates the subsequent exposure of the outlet opening.

Fig. 1

eine erfindungsgemäß gestaltete Getränkedose mit angebrachtem Drehdeckel in einer Seitenansicht,

Fig. 2

eine Draufsicht der in Fig. 1 dargestellten Getränkedose,

Fig. 3

eine vergrößerte Darstellung des in Fig. 1 mit III bezeichneten Bereichs,

Fig. 4

eine Draufsicht auf die Getränkedose gemäß Fig. 1 ohne Drehdeckel,

Fig. 5

einen Schnitt nach V-V in Fig. 4,

Fig. 6

eine Draufsicht auf den Drehdeckel,

Fig. 7'

einen Schnitt nach VII-VII in Fig. 4,

Fig. 8 a-c

die Funktion der Elemente am Dosendeckel mit den Elementen am Drehdeckel durch einen Schnitt entlang der Linie VIII-VIII in Fig. 4 und

Fig. 9 a-c

die Funktion der Elemente am Dosendeckel mit den Elementen am Drehdeckel durch einen Schnitt entlang der Linie IX-IX in Fig. 4

zeigt.The invention will be explained in the following by describing an embodiment of a container according to the invention and further inventive features with reference to the accompanying drawings, wherein

Fig. 1

an inventively designed beverage can with attached rotating lid in a side view,

Fig. 2

a top view of the Fig. 1 represented beverage can,

Fig. 3

an enlarged view of the in Fig. 1 area designated III,

Fig. 4

a plan view of the beverage can according to Fig. 1 without lids,

Fig. 5

a cut to VV in Fig. 4 .

Fig. 6

a top view of the rotary lid,

Fig. 7 '

a section according to VII-VII in Fig. 4 .

Fig. 8 ac

the function of the elements on the can lid with the elements on the rotating lid by a section along the line VIII-VIII in Fig. 4 and

Fig. 9 ac

the function of the elements on the can lid with the elements on the rotating lid by a section along the line IX-IX in Fig. 4

shows.

In Fig. 1 is shown in a side view of an inventively designed beverage can 1, as used in particular for carbonated drinks. This box described is designed again closed.

The can body 10 is made of tinplate and has a cone-shaped Floor section 11, which merges into a floor space. In the upper area, the can 1 tapers to form a can neck 12, wherein the opening is closed by a designed as a can lid mirror 20, which still cooperates in a manner to be described with a designed as a rotary lid second cover element. Fig. 2 shows the can of Fig. 1 in a plan view, wherein the details of the rotary lid are not shown.

Fig. 3 shows the design of the closure of the beverage can 1 within the area III of Fig. 1 in detail. As can be seen, the mirror 20, which is in the form of a first cover element, extends beyond the edge of the can neck 12 and is connected to it in a gastight manner by means of a fold. In the example described, the mirror is made of an aluminum sheet. Above this first cover element, a rotary cover 50 is arranged, which extends radially over the mirror 20 and extends at its radial edge approximately parallel to the axis of the container down and overlaps the folding of the mirror by means of circumferentially spaced latching noses 51. The rotary lid 50 is resiliently against the can lid 20 and is rotatably mounted to this or the can body 10, wherein the axis of rotation is located on the axis of the can body 10.

Fig. 4 shows a plan view of the beverage can with the rotary lid is removed. Fig. 5 shows a corresponding sectional view along the line VV in Fig. 4 , As already explained, the mirror 20 is fixed by means of a fold 21 on the edge 13 of the can body or the can neck 12. For this purpose, the mirror 20 at its radial edge on a mirror collar 25 which nestles around the edge 13 of the fuselage. Inside the container edge of the mirror is formed into an annular groove 22 which receives an annular bead formed on this for guiding the rotary lid. To reinforce the can lid this has a reinforcing bead 23.

Off-axis is in the mirror a circular lid tongue 30th arranged, which is defined by an almost closed dividing line 27. This dividing line 27 is interrupted by a web hinge 31. The lid tongue 30 is after breaking open the dividing line 27, the discharge opening in the can lid free, the lid tongue is bent in a manner to be described during the opening process down into the container interior, but remains connected via the web hinge 31 with the mirror.

The dividing line 27 is formed in a first embodiment acting as a line of weakness scribe line, which is breakable by the application of a force on the lid tongue 30. Within the lid tongue 30, a ventilation tongue 40 is arranged, which is defined by a further dividing line 39, which in turn is designed like the dividing line 27. By breaking the dividing line 39, the ventilation tongue 40 releases a ventilation opening, wherein the ventilation tongue 40 is fastened captive in the same way as the lid tongue on a web hinge 42, even if the ventilation tongue 40 is lowered from the lid tongue 30 into the can. On the ventilation tongue 40, an approximately circular raised bead is arranged in the form of a projection, which extends upward from the drawing. The edge of the ventilation tongue 40 and thus the ventilation opening lies completely within the lid tongue 30th

Further, two in plan view oval-shaped beads 32, 36 are arranged on the cover tongue 30 adjacent to each other, wherein the long half-axes are each approximately tangent to an imaginary circle, which is designated in the drawing with IX-IX. Starting from the base of the mirror 20 or the lid tongue 30, the recess bead 32 extends into the interior of the container like a projection, while the enlargement bead 36 extends upwards out of the mirror or cover tongue plane. The two beads 32, 36 are arranged to each other such that the flank of the recess bead 32 substantially without a transition into the flank the elevation bead 36 transitions, providing a ramped control surface for a cam to produce an approximately axially directed force on the lid tab to break the dividing line 27. The axial height or depth of the beads are the same in the example given, so that ultimately a ramp height can be provided, which corresponds in the direction of the can axis of twice the height of a single bead.

In the FIGS. 6 and 7 now is the cooperating with the can lid 20 rotary cover 50 is shown. The circular rotary cover 50 has at the edge an annular groove 52, with which this surrounds the fold 21 of the can lid 20. Latches 51 serve to encompass the fold 21, see Fig. 5 , In this respect, the rotary cover 50 is secured against detachment from the can lid 20, wherein at the same time a rotation of the rotary lid can be provided against the can lid.

The rotary lid has a kidney-shaped opening 53, which can be aligned by rotation of the rotary lid relative to the can lid to the dispensing opening, which results from the breaking of the dividing line 27 and the downward bending of the lid tongue 30. The rotary lid 50 further includes radially and circumferentially spaced projections 54, 55 formed as dimple beads, ie beads that extend into the plane of the drawing and serve as cams, which engage with the crimp bead 41 and dimple bead 32 and crimp bead, respectively 36 cooperate during the opening process. In Fig. 6 the respective loci of the cams 54, 55 are indicated by circular sections, which are traversed by the cams during rotation of the rotary cover.

Below and with reference to the Figures 8 ac and 9 ac describes the interaction of the rotary cover 50 with the can lid 20 for opening and reclosing the can. In the initial position, ie not yet broken dividing lines 27, 39 of the rotary cover 50 is arranged so that the engages in the direction of the can lid extending projection 54 in the recess bead 32. In this case, the height of the recess bead is such that the head of the projection 54 does not touch the bottom of the recess bead. The relative position of can lid to rotating lid is also characterized in the starting position in that the projection 54 is arranged spaced from the flank of the recess bead 32, so that a freewheel of the cam 54 results within the recess bead 32 during the rotational movement of the rotary cover performed during the opening process , This means that the cam 54 does not act on the flank 33 of the depression bead in the first phase of the opening process when moving the rotary cover. In the starting position, however, the cam 55 is in the immediate vicinity, for example touching, on the raised bead placed on the ventilation tongue 40.

Now, if a rotation of the lid 50 during the opening operation, first the projection 55 cooperates with the raised bead of the ventilation tongue 40 by the cam 55 against the raised bead 41 (see Fig. 4 ) is rotated. The cam 55 first contacts the flank of the raised bead 41 on the venting tongue 40, thereby exerting a force on the venting tongue 40 having a component in the direction normal to the mirror 20. As the cam 55 continues to move toward the raised bead, the force increases until ultimately the dividing line 39 breaks and the vent tab 40 is forced down into the container, exposing the vent 43. By the process described, an overpressure in the beverage can escape before the actual dispensing opening is exposed. With continuous opening movement, ie rotation of the rotary cover 50, the projection 55 extends beyond the venting tongue 40. The locus of the cam 55 for this movement is in Fig. 6 indicated with the associated circle section. The starting position of the rotary cover with respect to the cam 55 shows Fig. 8a, Fig. 8b shows the situation during the opening process and Fig. 8c the situation, in which the cam 55 has completely run over the ventilation tongue.

Similarly, in the FIGS. 9a-d the breaking of the dividing line 27 for bending the lid tongue 30 is shown, whereby the discharge opening 35 is exposed. In the Fig. 9a shown situation corresponds again to the starting position of the rotary cover, in which the dividing lines 27, 39 are not yet broken. The locus of the cam 54 for its movement is in Fig. 6 indicated with the associated circle section. The cam 54 has the already described freewheel in the recess bead 32, within which it can be moved without it abuts the flank 33 of the recess bead. Fig. 9b shows just the situation in which the cam 54 and the edge 33 touch, which corresponds to a rotational position of the cam 54, which in Fig. 8b is shown. When the cam 55 comes into engagement with the control surface formed by the flank 33 of the recess bead and the flank 37 of the raised bead, the beverage can is ventilated, thereby facilitating the breaking of the dividing line. Since the two covers 50, 20 are arranged axially fixed to one another at the edge of the beverage can, the force component occurring on the lid tongue approximately parallel to the can axis and caused by the interaction of inclined surfaces 33, 37 with the cam 54 causes the dividing line 27 to be broken open and as the cam 54 advances on the ramp to the top of the heightening bead 36, the lid tongue 30 is pushed inwardly into the soda can, see Fig. 9c , The cam 54 moves on the further rotation of the rotary cover 50 to the edge of the discharge opening 35, see Fig. 9b , Since the cam 54 extends beyond the edge of the dispensing opening 35 into the can, this edge acts as a rotation stop during the opening movement. The lid tongue 30 is held by the web hinge 31 after the completion of the opening operation in which the dividing line 27 is completely broken Fig. 4 ,

At the edge of the discharge opening 35, a sealing bead 26 is arranged, see also Fig. 4 , which allows a closure of the beverage can after the opening process in which the rotary lid 50 is turned back to the extent that its opening 53 comes to rest outside of the circular seal 26. In this case, the sealing bead 26 arranged between the two covers 20, 50 bears in a fluid-tight manner relative to both covers.

The recessed bead 32 and the raised bead 36 are arranged adjacent to each other so that they pass directly into each other without a shoulder and have the same pitch in the transition area. The flank angle in the effective range of the inclined surface, i. in the region in which the projection 54 contacts the flanks 33, 37, in the given embodiment is approximately 45 °.

In the embodiment shown in the figures, the dividing lines 27, 39 are designed as scribing lines, so that the metal is weakened there to be broken as described. In one embodiment, not shown, these separation lines can also be generated that the material is cut through in the can lid 20 for fixing the lid tongue or the ventilation tongue and the mirror is coated on the inside at least in the region of the cutting lines with plastic. In this case, the cams 54, 55 cooperate in the opening movement of the rotary cover with the respective control surfaces for breaking up this plastic layer. It can also be provided that the edges of the opening of the lid tongue or the opening of the ventilation tongue are widened radially inwardly by deformation, so that both tongues abut against the expanded mirror material from the inside. This ensures that an increased inner pressure can not cause the tabs are moved beyond the plane of the mirror outward, which could possibly break the inner layer of plastic on the dividing lines.

LIST OF REFERENCE NUMBERS

1

beverage can

10

can body

11

bottom section

12

neck

13

edge

20

Mirror, can lid

21

fold

22

ring groove

23

reinforcing bead

25

mirror collar

26

sealing bead

27

Dividing line

30

lid tab

31

Steg hinge

32

depressed bead

33

Flank of the depression bead

35

discharge opening

36

increasing bead

37

Flank of the raised bead

39

Dividing line

40

ventilation tongue

41

increasing bead

42

Steg hinge

43

vent

50

rolltop

51

locking lug

52

ring groove

53

opening

54

cam

55

cam

Claims (18)

1. Container, comprising a container body having a primary opening which is closed by a metal mirror acting as a first lid element, said metal mirror having a lid tab which is defined by a parting line and, after being broken open, exposes an outlet opening, and said lid tab having a sloping surface, which interacts with a first projection arranged on an opening means that is movable substantially parallel to said mirror for applying of a force to the lid tab to break open the parting line, wherein the sloping surface comprises at least one portion of a flank of an elevated bead arranged on the lid tab, and wherein the opening means which is substantially movable in the mirror plane for applying a force to the lid tab is constructed as a second lid element (50) that is arranged above the first lid element (20) and is supported relative to the container body for rotation about its axis,
   characterized in
   that the lid tab (30) further comprises a depressed bead (32) arranged adjacent to the elevated bead (36), said sloping surface being made up at least of one portion of a flank (33) of the depressed bead and the at least one portion of a flank (37) of the elevated bead, and said second lid element comprising a second projection for venting the container prior to breaking open the parting line (27) that defines the lid tab (30), said projection, during a substantially horizontal rotary movement of the second lid element, interacting with a ventilation tab to break open a parting line on the lid tab defining the ventilation tab.
2. Container according to claim 1, characterized in
   that the depressed bead (32) and the elevated bead (36) merge into each other, wherein the transition area is substantially formed without a bead bottom.
3. Container according to claim 1 or 2, characterized in
   that the depressed bead (32) and/or the elevated bead (36) are substantially oval when viewed from above.
4. Container according to claim 1, 2 or 3, characterized in
   that the amount of the depth of the depressed bead (32) is substantially equal to the height of the elevated bead (36).
5. Container according to one of the claims 1 to 4, characterized in that the depressed bead (32) and the elevated bead (36) are respectively formed in the lid tab (30) by a deformation process without the use of a holding down device.
6. Container according to one of the claims 1 to 5, characterized in that in the effective range of the sloping surface with the associated first projection the depressed bead (32) and/or the elevated bead (36) have a flank angle of 30° to 70°, in particular 40° to 50°.
7. Container according to one of the claims 1 to 6, characterized in that the first projection (54) provided on the second lid element and associated with the sloping surface (33, 37) on the lid tab (30) in its initial position prior to breaking open the parting line (27) of the lid tab protrudes into the depressed bead (32) and has a range of motion within which the first projection does not contact the sloping surface.
8. Container according to one of the claims 1 to 7, characterized in that the second projection (55) provided on the second lid element and associated with the ventilation tab (40) is arranged directly adjacent to the ventilation tab in its initial position prior to breaking open the parting line (39) of the lid tab (30).
9. Container according to one of the claims 1 to 8, characterized in that the ventilation tab (30) comprises an elevated bead (41) which is substantially circular when viewed from above.
10. Container according to one of the claims 1 to 9, characterized in that the mirror (20) is connected to the container body (10) by means of folding (21), bonding or soldering.
11. Container according to one of the claims 1 to 10, characterized
    in that the second lid element (50) includes an eccentric opening (53) that can be moved over the outlet opening (35) by rotating the second lid element.
12. Container according to one of the claims 1 to 11, characterized by a sealing means (26) surrounding the parting line (27) of the lid tab on the outside thereof and arranged in particular on the first lid element (20).
13. Container according to one of the claims 1 to 12, characterized
    in that the first projection (54) after breaking open the parting line (27) of the lid tab and during the continued rotation of the opening means relative to the container body (10) hits against the rim of the outlet opening (35) thus stopping the rotary movement.
14. Container according to one of the claims 1 to 13, characterized
    in that after breaking open the parting line (27) of the lid tab (30) and at a predetermined relative rotational position of the first and second lid elements (20, 50) the sealing means of the first lid element cooperates with the inner surface of the second lid element for sealing the container.
15. Container according to one of the claims 1 to 15, characterized
    in that the first projection cooperating with the sloping surface (33, 37) is provided on the second lid element in the form of a depressed bead (54) which in an initial position extends with the bead head thereof into a depressed bead (32) on the lid tab (30).
16. Container according to one of the claims 1 to 15, characterized
    in that the depressed bead (32) and the elevated bead (36) of the sloping surface (33, 37) are arranged relative to each other in such a way that their profile major-semi axes are substantially tangential to a circular path on the lid tab (30).
17. Container lid for a container having a container body made from a non-deforming material such as metal, PE or cardboard, the container body including a primary opening which is closed by a metal mirror acting as a first lid element, said metal mirror comprising a lid tab defined by a parting line which after being broke open exposes an outlet opening and the lid tab comprising a sloping surface which interacts with a first projection on an opening means movable substantially parallel to the mirror for exerting a force on the lid tab to break open the parting line, and the sloping surface at least comprising one portion of a flank of an elevated bead arranged on the lid tab and the opening means which is substantially movable in the mirror plane for applying a force to the lid tab is constructed as a second lid element (50) that is arranged above the first lid element (20) and is supported relative to the container body for rotation about its axis,
    characterized in
    that the lid tab (30) further comprises a depressed bead (32) arranged adjacent to the elevated bead (36), said sloping surface being made up at least of one portion of a flank (33) of the depressed bead and the at least one portion of a flank (37) of the elevated bead, and said second lid element comprising a second projection for venting the container prior to breaking open the parting line (27) that defines the lid tab (30), said projection during a substantially horizontal rotary movement of the second lid element interacting with a ventilation tab to break open a parting line on the lid tab defining the ventilation tab.
18. Process for opening a container having a container body made from a non-deforming material such as metal, PE or cardboard, said container body including a primary opening which is closed by a metal mirror as a first lid element, wherein during the opening operation for exposing an outlet opening a parting line on the mirror is broke open which defines a lid tab and wherein for breaking open the parting line a first projection provided on an opening means movable substantially parallel to the mirror is moved along a sloping surface of the lid tab thus producing a force on the lid tab, wherein during the opening operation the first projection (54) is moved at least in sections along a flank (37) of an elevated bead, characterized in
    that the first projection (54) during the opening operation is further moved at least in sections along a flank (33) of a depressed bead (32, 36) arranged adjacent to an elevated bead and that during the opening operation twisting of an opening means comprising the first and second projections and constructed as a second lid element relative to the first lid element is performed, wherein for venting the container prior to breaking open the parting line (27) of the lid tab (30) a parting line (39) on the lid tab (30) defining a ventilation tab (40) is broke open by the second projection cooperating with the ventilation tab for applying a force to the ventilation tab.

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