EP3880574A1

EP3880574A1 - Captive closure with stabilized opening angle

Info

Publication number: EP3880574A1
Application number: EP19802116.4A
Authority: EP
Inventors: Günter Krautkrämer
Original assignee: Bericap Holding GmbH
Current assignee: Bericap Holding GmbH
Priority date: 2018-11-16
Filing date: 2019-11-06
Publication date: 2021-09-22
Anticipated expiration: 2039-11-06
Also published as: EP3995410C0; EP4303149A3; US20220002021A1; ES2974521T3; DE202019005974U1; EP3880574C0; HUE066464T2; EP3995410A1; EP3880574B1; EP4303149A2; PL3995410T3; BR112021007456A2; EP3995410B1; CN113015683A; EP4403486A1; US20230090849A1; WO2020099200A1

Abstract

The invention relates to a closure consisting of a screw cap (10) with a tamperproof strip (3). The screw cap has at least one cylindrical cap casing (2) with an inner thread and a circumferential tamperproof strip at the lower open end of the cap casing, said tamperproof strip being connected to the lower edge of the cap casing along easily tearable weakness lines (13, 14), wherein the tamperproof strip remains captively connected to the cap casing after a tearing process along the weakness lines by means of holding strips (15, 16). The aim of the invention is to design a captive screw cap with a tamperproof strip in such a manner that after the screw cap has been unscrewed and released from the bottleneck opening, the screw cap is folded away or tilted into a position in which the screw cap does not interfere with the additional use of the bottle or with pouring or drinking out of the bottle and can remain there without additional measures. According to the invention, this is achieved in that the holding strips are formed by two weakness lines, each of which is interrupted at least once in the circumferential direction and which partly overlap in the circumferential direction and run at an axial distance to each other at least in the overlap region. The separating web (11, 12) of each of the two weakness lines is bridged by the respective other weakness line preferably at an axial distance.

Description

Captive closure with stabilized opening angle

The present invention relates to a captive closure, consisting of a screw cap, which has at least one cylindrical cap casing with an internal thread and a circumferential guarantee band at the lower, open end of the cap casing, the guarantee band being connected to the lower edge of the cap casing via at least one easily tearable line of weakness , wherein the tamper-evident tape remains tied to the cap jacket after tearing along the lines of weakness via retaining straps. The present invention also relates to a combination of a container neck with an external thread and a corresponding screw cap.

Plastic products and corresponding plastic waste, in particular in the form of so-called microplastics, which are formed from abrasion and decay from plastic waste, are increasingly the focus of public attention. The screw closures to which the present invention relates are also made of plastic, typically of polyethylene or of polypropylene. The deposit system, which has also been introduced for single-use plastic bottles, does reduce the number of plastic bottles accumulating in the residual waste, which are instead recycled; however, this does not prevent the caps of the bottles from being screwed back onto the bottle after emptying, but instead being disposed of separately or thrown away and thus entering the environment in an uncontrolled manner and, for example, on the banks and beaches into the sea.

There have therefore been and still are efforts to design closures on bottles, in particular on beverage bottles, in such a way that they remain connected to the bottle neck even after a bottle has been opened. Such a property is also called “captive”.

In principle, captive closures are known.

In the case of disposable bottles in particular, the so-called guarantee tapes, which are connected to the lower edge of a cap jacket via weak points, remain underneath a so-called pilfer proof ring on the bottle neck and already form a captive part of the closure. In this respect, you just have to make sure that the screw cap also after the opening and loosening of the screw cap from the bottle neck thread via at least one band section or the like, here referred to as a holding band, remains connected to the guarantee band, which in turn is held onto the bottle neck by the so-called pilferproof ring. A pilfer proof ring is typically a ring-shaped projection running around under a bottle neck thread with an essentially flat or slightly conical underside, behind which protruding radially inward projections or parts of a guarantee band, so that the guarantee band is held in place by the pilfer proof ring when a screw cap is unscrewed while the Tear weak points between the guarantee band and the cap casing.

You then only have to make sure that the connection between the guarantee band and the cap jacket remaining via the at least one retaining strap is long enough to be able to lift the screw cap completely from the mouth of the bottle neck and move it to the side or tilt it away from the bottle neck opening.

However, these captive screw caps have often proven to be very annoying in use, since the caps move back, for example, when pouring liquid from a corresponding bottle in front of the opening of the bottle, or twist under the effect of gravity on the bottle neck and when pouring into the bottle Liquid jet.

Especially when a user wants to drink directly from a bottle, appropriate screw caps still connected to the bottle neck are often in the way and annoying. The conventional captive closures can also cause malfunctions when closing bottles in high-performance capping systems.

In practice, captive closures have not yet established themselves to a desirable extent. The present invention is therefore based on the object of designing an adjustable screw cap with a guarantee band in such a way that the screw cap after unscrewing and loosening from the neck of the bottle into a position which does not disturb the further use of the bottle and the drinking or pouring out of the bottle folded away or tilted and can remain there without additional measures. The screw cap is also referred to here briefly as “cap”.

This object is achieved by a screw cap according to the present invention as defined in claim 1. In the screw closure according to the invention, retaining straps are formed by two weakening lines which are interrupted at least once in the circumferential direction and which are axially spaced from one another and partially overlap each other in the circumferential direction, interruption sections of both weakening lines being bridged axially by the respective other weakening line.The weakening lines can be made by cuts or can also be produced by dividing lines with webs already formed in the injection molding tool.

The aforementioned interruption sections of the weakening lines are referred to below as “separating webs”. The dividing web of the upper weakening line effectively forms an axial extension of the cylindrical cap shell that is limited to a peripheral sector. The separating web of the lower weakening line forms an axial extension of a lower guarantee band section which is held stationary on the bottle neck.

In conventional closures, in which the guarantee band and the cap casing are connected to one another along a single circumferential weakening line that tears open when they are opened for the first time, the "guarantee band" is understood to mean all sections at the lower edge of a closure cap casing that extend axially below or from the cap thread beyond Levels of the line of weakness lie, which corresponds to the line referred to here as the upper line of weakness.

"Axially below" also includes the inward and upward angled section of a so-called flex band, which forms an axial extension of the outer guarantee band section during the manufacture of the closure cap, even if parts of this angled flex band section, when folded up, are on the inside of the cap can extend above the level of the upper weakening line.

To simplify the description, the above definition of the term “guarantee band” is retained here, i.e. Both dividers are considered part of the guarantee band insofar as they are below the level of the upper weakening line, even if the dividing web of the upper weakening line remains firmly attached to the lower edge of the cap shell and only along the lower weakening line from the parts that are stationary on the bottle neck of the guarantee band releases. This also applies analogously to the straps, which are also below the level of the upper weakening line when the closure is closed, but do not remain in this position when and after opening,

The guarantee band defined in this way consists of a part that remains stationary on the bottle neck, which - apart from a rotation - remains immovable relative to the bottle neck, and of moving parts, such as the holding straps and the upper dividing bar, which, when opened, move relative to the bottle neck stationary part and the bottle neck are movable, but remain connected to the stationary part.

In this way, the closure remains permanently connected to the bottle neck.

The separating webs have ends in the circumferential direction which are each connected to one of the ends of the retaining straps over their axial width. The separators have at least the same inner radius as the cap jacket. The lower edge is the free end face of the upper separator pointing axially downwards, while the axial end area of the upper separator comprising the edge is referred to as the “edge”.

The circumferentially overlapping portions of the lines of weakness define the retaining straps as between the lines of weakness in the circumferential direction, strip-shaped sections of the guarantee tape.

The cylindrical cap jacket with an internal thread defines an axis of the closure, and the bottle neck, onto which a corresponding screw cap is screwed, defines an axis of the bottle neck. When closed, these axes coincide.

A sufficient axial distance of the lines of weakness of, for example, at least 2 mm in their overlap area leads to sufficiently strong holding straps which do not tear up to a tensile force of 30 N and generally also up to 40 N. For an average consumer and especially for children, it is therefore not readily possible to tear off the screw cap from the part of the guarantee band held under the pilferproof ring by tearing the retaining straps. As a result, the cap including the guarantee band remains permanently connected to the bottle neck.

By appropriate coordination of the circumferential extent of the separating webs and the (measured in the axial direction) distance of the weakening lines, it can be achieved that a screw cap after unscrewing and lifting as well as folding over was in sufficient distance from the neck opening of the container in a sufficiently stable position in which it is placed remains after opening and folding and, regardless of the orientation of the associated container or bottle neck, does not get into a disturbing position in front of the mouth of the bottle due to your own weight. The terms “container” and “bottle” are used synonymously in the context of the present invention, since the exact nature of the container is not important with regard to the invention, as long as it only has a neck with an external thread on which the closure or the screw cap of the Closure fits.

Each of the two weakening lines expediently has exactly one separating web and the centers of the two separating webs are diametrically opposite one another. In any case, the lines of weakness are axially spaced from one another in their overlap areas. In one embodiment, in the case of the unopened closure, the two lines of weakness remain along their entire circumferential extent in the same, but different axial position between the two lines of weakness. However, the axial position of the lines of weakness can also vary along their course in the circumferential direction, as long as this does not make the retaining straps too narrow and maintain a sufficient tensile strength of at least 30 N to preferably at least 40 N.

Such an axial distance is not important in the dividers of the weakening lines and the other weakening line that is not interrupted there could pass into an axial position in this area that otherwise corresponds to the broken weakening line or has an even greater axial distance from it.

The upper weakening line defines a dividing line between the lower edge of the cap casing and the guarantee band. The lower weakening line separates the guarantee band along a circumferential section into a lower and an upper guarantee band section, the upper guarantee band section being fixedly connected to the cap jacket in the region of the interruption of the upper weakening line and otherwise defining a section of the dividing line between retaining straps and the lower guarantee band section.

In one embodiment, the guarantee band is a so-called flex band, which has a first, in the axial extension of the cylindrical cap jacket, outer guarantee band part and a second, from the lower end of the first guarantee band part radially inwardly and upwardly folded guarantee band part, the free, upward-facing part End engaging elements for engagement with the underside of the pilfer proof ring.

The terms “above” and “below” are used here as they result from the orientation of the closure placed on the mouth of a vertical bottle. The separation of the guarantee band along the entire length of the weakening lines leads to the fact that in the overlap region of the weakening lines, strip-shaped sections of the guarantee band are produced due to their axial spacing, which are referred to here as holding bands. These retaining straps connect the respective separating webs of the upper and lower weakening lines, these dividing webs in turn forming a connection to the cap jacket or to the first guarantee band part, which is provided for stationary retention on a bottle neck. The separating web of the lower weakening line is one of the factors determining the length of the retaining straps, but has no further function with regard to the stability of the opened cap position. The separator of the upper weakening line (upper separator), on the other hand, depending on the design, contributes significantly to the stabilization of a wide open state of the cap. As far as the "separator" is mentioned below without further identification, this upper separator is therefore always meant. This separating web forms an axial extension of the cap jacket and is firmly connected to it.

The ends of this separating web in the circumferential direction are each connected to one of the ends of the holding straps, the other end of the holding tapes is each connected to the ends of the lower separating web in the circumferential direction

After unscrewing and then folding or folding the screw cap, which remains connected to the bottle neck via the dividers and the retaining straps, the cap comes into a position after a pivoting movement of approx. 90 °, in which the cap swiveled the lower edge of the separating web is moved radially inwards to the bottle neck and the upper edge of the dividing web, directly adjacent to the cap jacket, is moved radially outwards away from the bottle neck.

The retaining straps between the two separating webs are thereby twisted and hold the cap or the separating web axially extending the cap in contact with the bottle neck. The lower edge of the separating web or its lower edge is in contact with the bottle neck and forms a pivot point on the bottle neck, which, however, shifts in the axial direction during the pivoting movement on the bottle neck

Apart from a slight restoring force of the twisted straps, the tamper-evident band initially does not provide any appreciable resistance during the folding movement of the screw cap and the pivoting of the lower edge of the separating web radially towards the bottle neck. Since the retaining straps are connected over their entire width to the ends of the separating web, the sections of the holding tapes which attach directly to the upper end of the separating web are stretched somewhat more than the sections which attach to the lower of the separating web. The axial height of the separating web between the pivot point and the upper attachment of the retaining straps thus forms a lever for the tensile force of the retaining straps, which supports the further opening movement of the cap when the pivot point is at a dead center of approximately 90 °. The cap thereby achieves a stable opening angle of e.g. B. 140 ° with respect to their original position. In addition, the straps extend due to the upward movement of the screw cap with the upper separator over the pilferproof ring, which contributes to stretching and tension in the straps. Also the fact that the separator is over a certain peripheral angle of z. B. extends 20 - 60 °, when folding the cap leads to an increase in the distance between the ends of the separator from the bottle neck and thus to a corresponding increase in the tensile force in the because of the arcuate course of the separating web along the circumference and with the radius of the cap jacket Retaining straps that hold the cap in the wide open position by pulling the folded divider on the bottle neck.

Basically, however, the straps, d. H. the length of the overlap areas of the two lines of weakness, and also the axial height and circumferential length of the separating web, are designed in such a way that an expansion of the bands remains in the elastic range and does not reach the yield point.

This means that due to the engagement between the lower edge of the separator and the bottle neck by the retaining straps, a varying force is exerted on the separator, which increases when the screw cap is tilted, then passes over a dead center and then subsides again, namely when the Screw cap and with it the upper separator are tilted by more than about 90 ° with respect to their closed position, the straps extending between the two separators being twisted. Because of a comparatively small wall thickness of, for example, 0.3 to 0.6 or 0.8 mm and a moderate (measured in the axial direction) width of the holding straps of, for example, 3 mm, the elastic restoring forces due to the torsion of these holding straps are relatively low in comparison the force exerted by the straps towards the bottle neck on the upper separator,

As a result, the folded position of the closure reached after overcoming a dead center remains essentially stable and the screw cap does not move in a disruptive manner in front of or too close to the bottle neck opening. So that the screw cap does not interfere, especially when drinking from the mouth of the bottle neck, in one embodiment the axis of the cap, which coincides with the axis of the bottle neck in the closed state of the closure, should assume a stable position after opening and folding over to the side it is pivoted by at least 120 degrees, preferably by at least 140 °, with respect to the starting position or with respect to the axis of the bottle neck.

In view of the functioning of the captive closure during and after flipping over the screw cap, it becomes clear that the specifically created restoring and stabilizing forces depend on a whole series of interacting parameters, including a certain axial width and the circumferential extent of the one fixed to the cap jacket , upper separator, the difference between the outer radius of the bottle neck and the inner radius of the separator, which corresponds to the inner radius of the cap, and the circumferential extent of the lines of weakness and the lower separator (and thus the length of the retaining straps).

The aforementioned parameters can be coordinated in different combinations in such a way that the flip-over movement of the screw cap takes place over a dead center, so that the screw cap as a whole has a bistable position, the screw cap not interfering with access to the bottle neck mouth in the fully open, stable position. Preferred and practically functional values for the above parameters are given below and in the dependent claims.

In principle, it is expedient, if not essential, that each weakening line has exactly one dividing line and the center points of the dividing lines are diametrically opposite one another. The separator of the lower weakening line, which is firmly connected to the rest of the guarantee band, limits in one direction the overlap between the upper and lower weakening lines and the overlapping of the weakening lines determines the length of the retaining straps that the guarantee band remaining on the bottle neck with the screw cap jacket connect.

The separating web of the upper weakening line expediently extends over a circumferential angle between 10 ° and 75 °, preferably in the range between 20 “and 60 °. An angle in this area ensures that the separating web is stable in itself and is folded down together with the cap jacket and that not only is the cap jacket bent over in relation to the dividing web when it is opened, but on the other hand this also ensures a sufficient force effect that the folded-over Holds the closure in its fully open position, for which the dividing bridge must have a certain minimum length in the circumferential direction. The separating web of the lower weakening line, which is diametrically opposite the dividing web of the upper weakening line, can extend over a circumferential angle between, for example, 120 ° and 200 °, preferably between 170 ° and 190 °, the difference in the circumferential angle of the upper and lower separating webs being the length defines the straps that extend between the remaining part of the guarantee band and the cap jacket.

The width of the separating web remaining on the cap jacket should preferably be at least half the width of the total intact, i.e. H. not yet separated along the lines of weakness, guarantee band, so that the torsion of this relatively wide section compared to the rest of the guarantee band causes a corresponding difference in diameter and length between the radially inner, lower edge of the separating web and the upper edge of the dividing web attached to the screw cap.

Expressed in numbers, the width (in the intact state) of the separating web remaining on the cap jacket measured in the axial direction should be at least 1.5 mm, preferably at least 2 mm and in particular about 3 mm or more. The wall thickness of the guarantee band, on the other hand, is in a range between 0.3 and 0.8 mm, so it is clear that the forces caused in the band by twisting the separating web compared to the rest of the band are caused, among other things, by the different inner and outer radius of the twisted guarantee band sections (consisting of the holding straps and the upper separating web), which is larger the wider the twisted section is.

The minimum width of the holding straps measured in the axial direction depends, among other things, on the plastic material actually used and also on the wall thickness of the holding straps. The minimum distance between the lines of weakness, which defines the minimum width of the holding straps, should accordingly be greater than 1 mm, preferably greater than 2 mm and in particular greater than 2.3 mm in one embodiment. An upper limit is determined by the width of the guarantee band. The retaining straps, which are effectively formed as the sections of the guarantee band running between the dividing lines, then have sufficient tear strength to prevent the screw cap from being torn off forcefully - at least by the hands of children. The retaining straps are preferably tear-resistant up to a tensile force of at least 30 N, preferably at least 40 N.

The combination according to the invention of a bottle neck with an external thread and a closure, as described above, is characterized in that the outside diameter of the bottle neck above a pilfer proof ring, the inside diameter of the guarantee band, as well as the width, the circumferential extent and any thickening of the top Separator are matched to each other so that after loosening and when the screw cap is folded down, the free lower edge of the separator engages with the bottle neck. The straps are twisted a little. When a tilting angle of approx. 90 ° is exceeded, the cap with the separating web is moved past a dead center, so that the outside of the dividing web then faces the outside of the bottle neck and the screw cap is folded down by more than 90 ° due to a certain tension in the retaining straps Position is stabilized.

The tilt or flip angle is defined here as the angle between the axis of the bottle neck (which coincides with the closure axis when the bottle or container neck is closed by the closure) and the closure axis in the folded state.

The difference between the outer diameter of the bottle neck in an area above the pilferproof ring, in which the upper separating web of the guarantee band is arranged on the bottle neck after the closure has been opened, should be less than 2.5 mm, preferably at most 1.5 mm, less than that nominal inside diameter of the guarantee band. “No minimum inner diameter” means the inner diameter of the guarantee band without any flexible band section, which in particular also corresponds to the inner diameter of the cap in the area of the upper separating web before the lines of weakness are separated

In the variants discussed below, a small difference in diameter is ensured between the relevant section of the bottle neck or the pilferproof ring, along which the lower edge of the separating web slides, and the diameter of the guarantee band by adjusting the bottle neck diameter or the pilferproof ring profile and thus also its diameter .

A small difference in diameter ensures that the lower edge of the separator, which is firmly connected to the lower edge of the cap shell and is located above the pilferproof ring after unscrewing the screw cap, engages with the bottle neck at a relatively small angle of tilt and also After the dead center is exceeded, a force caused by this intervention acts between the bottle neck and the separating web, which holds the stabilized screw cap in the wide open position and stabilizes it.

In a variant of the combination of container neck with screw thread and closure according to the invention, the pilferproof ring has a profile which is defined by a lower flank, which extends in an axial section at least 80 ° to the bottle neck axis, an area of maximum diameter and an upper flank, which extends under a tilt angle <90 ° relative to the bottle neck axis and below the thread of the bottle neck passes into the outer bottle neck diameter. The upper flank or a section of the bottle neck extends above the upper flank of the profile of the pilferproof ring at least into one or up to an axial position which, when the screw cap is in the maximum folded position, reaches from the lower edge (1 1 a) of the upper separating web becomes. This section has a larger outside diameter than the bottle neck (20) without a thread profile or in the thread root.

This means that when the screw cap is unscrewed and folded over, the upper separator is first raised above the area of the maximum diameter of the pilferproof ring and its lower edge slides onto its upper flank, the area in this area which is covered by the lower edge of the separator. Enlarged bottle neck diameter pushes the separator further radially outwards than would be possible with the bottle neck diameter as it would otherwise exist between the pilferproof ring and the thread and also on the thread base. This causes a further torsion of the straps and thus rotates the separator and the screw cap into an even further tilted position.

The difference between the outer diameter of the upper flank or the section above it and the bottle neck diameter without a thread profile, i.e. H. on the thread base, should be at least 0.1 mm, preferably at least 0.3 mm and up to 1 mm in the variant described above.

In particular, in the combination of the container neck with screw thread and closure of the pilferproof ring has a triangular profile or a trapezoidal profile, the lower flank of which extends at an angle of 80 ° or more, that is to say perpendicular or almost perpendicular to the axis of the container neck, and the upper flank extends at an angle of about 30 ° or less to the axis of the neck of the container. When the container is opened by unscrewing the closure, the separating web slides over the ridge between the flanks of the pilfer proof ring, after which the upper flank of the pilfer proof ring comes into engagement with the separating web. Due to the small angle of the upper flank, the flank has a large axial extent and the area of a diameter defined by this flank, which is larger than the bottle neck diameter mentioned above, can easily be changed when opening and folding a screw cap from the lower edge of the Spread the divider across the painted area. Furthermore, the cylindrical neck section of the container neck, on which the cylindrical external thread is provided, can generally have a slightly larger (about 0.3 - 0.8 mm) larger diameter below the thread and above the pilfer proof ring than what, what leads to an even firmer engagement between the lower edge of the upper separating web and the bottle neck and thus tends to further increase the tilt angle between the bottle neck axis and the axis of the closure

Some established bottle neck standards cannot be changed in the short term and can only be changed at great expense and with the agreement of many involved parties, so that the diameter of a bottle neck or pilferproof ring and its profile can initially be regarded as unchangeable.For this, a further embodiment of a closure is presented which is suitable for the Use on standard bottle necks is provided, the standard thread depth is 1, 3 mm or more. An example of this is the bottle neck according to the PCO standard 1881.

With a deeper thread, the inner radius of the cap shell also has a greater difference to the outer radius of the bottle neck than with a less deep thread, since the inner radius of the cap shell corresponds at least to the radius of the thread root of the screw cap, which in turn is somewhat larger than the outer radius of the bottle neck thread.

This applies accordingly to the lower edge area of the cap jacket and the separating web attached to it.

For such deeper threads, a further parameter of the closure can be taken into account in order to ensure a sufficiently large and stable flip angle of the closure in the open state, namely the radial thickness of the upper separating web at its lower edge.

In the intact condition of the guarantee band, the lower edge of the upper separating web runs along the lower weakening line and is limited by this.

In one embodiment, which is primarily intended for closures and bottles, which have a thread depth beyond 1, 2 or 1, 3 mm, it is provided that the separating web of the upper weakening line has a radial thickening at least on its free lower edge.

In particular, this lower edge (when closed) is thickened radially outwards. This thickening is then after the screw cap is opened and folded over the pilferproof ring on the bottle neck. This thickening on the separating web compensates for at least a part of the radius difference between the bottle neck and the inner radius of the upper dividing web, which, as explained above, is also enlarged because of the deeper thread. The radial thickening is provided on the outside of the separating web and at least at one or two positions in the area of its lower edge. After the cap has been folded down by more than 90 °, the radial thickening lies on the bottle neck or on the upper flank of the pilferproof ring. The radial thickening at the dividing web thus forces the area of the dividing web lying radially inside the thickening, particularly at its lower edge with respect to the bottle neck, radially outwards, which effectively means that the part intended without the thickening of the separating web assumes exactly the same position and angular position as with a smaller radius difference between the bottle neck and the inside of the dividing web.

In a variant, the wall thickness of the separating web is up to 1 mm due to a radial thickening of its lower edge, whereby “thickening” means the radial projection of this area beyond the otherwise cylindrical surface of the guarantee band. With a wall thickness of the remaining guarantee tape of approximately 0.3 to 0.8 mm, this thickening is between 0.2 and 0.7 mm, in particular 0.2 to 0.4 mm. Without this thickening, the wall thickness of the guarantee tape - apart from the lines of weakness - is essentially constant and equal to the wall thickness of the cap jacket.

However, the thickening can also extend over the entire guarantee band section below the separating web, d, h to the lower edge of the guarantee band and in particular also along the entire circumference of a lower guarantee band section below a line, and between the upper and lower weakening lines and at a distance from this lies. This simplifies the manufacture in an injection mold and in particular also the generation of the lower weakening line in comparison to a variant which has a radial thickening which is limited to only a region along the lower edge of the separating web.

The radial thickening of the upper separator is particularly noticeable with larger thread depths on the bottle neck beyond 1.3 mm, such as with threads of the widely used standard type PC01881. The thickening has a stabilizing effect on the folded position of the opened cap and holds it Axis of the screw cap in the open state is tilted by more than 120, preferably by more than 140 ° with respect to the bottle neck axis.

The axial dimensions of all parts below the cap shell, which traditionally form a guarantee band, are in practice limited to a total of about 5 to 6 mm. On the one hand, the demand for material savings and the requirements are limited by appropriately bottle necks fit up this axial dimension. This level is limited at the bottom by sufficient functional stability. On the one hand, a guarantee band must be secured to the bottle neck in such a way that it can practically not be removed from the bottle neck without damage. On the other hand, it also has to withstand the forces when applying the closure to a bottle neck thread, in particular while it is being moved over the pilferproof ring. These conditions can no longer be met if essential parts of the guarantee band are axially shorter than, for example, 2 mm (apart from easily breakable bridges, which can be distributed along a line of weakness).

If, as in the present case, the closure part below the cap jacket is additionally divided into the elements of the stationary part, holding straps and separating webs, there is little scope for varying the axial width of the holding tapes and the axial height of the separating webs. In practice, both dimensions are in the range of 2 - 3 mm. In the circumferential area of the retaining straps and the upper separating web, an axial width of approximately 2-3 mm then also remains for the stationary outer guarantee band section. Any practical variation in the course of the weakening lines along their circumferential extent would therefore also be restricted to an axial area of at most 1 mm width for practical reasons. This would not change the basic function of a closure according to the invention and is therefore not discussed in detail here.

In one embodiment of the invention, the stationary part also forms a flexible band with the outer stationary section already described and a part which is folded inwards and upwards and which engages with the pilferproof ring of a bottle neck.

In a further variant, the closure is designed for use on an opening neck of a cardboard packaging.

Such a screw cap for cardboard packaging has a lower closure part with a circumferential flange on which a seal can be connected to the surface of a cardboard packaging, and a cylindrical pouring spout adjoining the flange, which has an upper outer and a lower inner opening, a screw cap with an internal thread, that can be screwed onto an external thread of the pouring spout, a cutting ring arranged in the pouring spout, which has at least one axially inwardly projecting cutting edge at its lower edge, and an axial lifting and driving device on the cutting ring and the screw cap, one on the inside of the Screw cap attached driver and an axial lifting device which moves the cutting ring axially in the direction of the lower opening and in the circumferential direction when turning the screw cap in the opening direction and thereby an at least partially circular cut in the container surface e brings in. For such a closure, too, the object of the invention is achieved in that the screw cap has a circumferential guarantee band at the lower edge of its cap casing, which, with an inner projection, engages behind a pilferproof ring on the outside of the pouring spout below the pouring thread, the guarantee band being replaced by two Separate, partially circumferential and partially overlapping and non-intersecting cuts are partially divided and partially separated from the jacket of the screw cap, so that in the circumferentially overlapping areas of the cuts from parts of the guarantee band, a retaining band is formed, which the by External screw cap loosely holds onto the lower part of the guarantee band, which remains divided at the closure.

This variant can also have all the features of the dependent claims 2-12, with respect to the combination of bottle neck and closure in claims 13-17, the respective bottle neck would have to be replaced by the lower closure part attached to a beverage carton

In the case of such a closure, the cutting ring has on its outside a second external thread which is opposite to the external thread of the pouring spout and which engages with a matching second internal thread on the inside of the pouring spout.

In this variant, the second internal thread and the second external thread can have a larger pitch than the internal thread of the screw cap and the external thread of the pouring spout, the factor between the different pitch heights preferably being at least 1.5

Furthermore, the driver of the screw cap can be designed as a lifting cam with a surface or edge inclined to the closure axis and an element of the cutting ring as a cam follower, and radially overlapping guide elements can be provided on the outside of the cutting ring and on the inside of the pouring spout, the guide elements Allow only axial movement of the cutting ring at the beginning of an opening rotation of the screw cap and only allow the cutting ring to be carried along in the circumferential direction after a predeterminable axial position of the cutting ring has been reached, and limit further axial movement,

Further advantages, features and possible uses of the present invention will become clear from the following description of a preferred embodiment and the associated figures. Show it: Figure 1 is a perspective view of the closure according to the present invention

FIG. 2 shows the closure according to FIG. 1 in a side view,

FIG. 3 shows a 360 ° development of the guarantee band of the closure from FIG. 2,

4 A-C show the closure according to FIG. 1 in different stages of an opening process,

Figure 5 shows a folded closure, in which the separator with the top

Flank of a pilfer proof ring is engaged,

FIG. 6A shows a detailed view from FIG. 5,

6B shows an axial section through a bottle neck with a pilferproof ring according to FIG

Invention,

FIG. 7 shows a detail analogous to FIG. 5 with a different profile shape of a pilfer proof ring,

FIGS. 8A, 8B variants of the design of a bottle neck in the area above a pilfer proof ring,

9 shows a side view of a further embodiment of a closure, partly in section, in particular for greater thread depths, in the closed state FIG. 9A shows an enlarged sectional view of detail area B in FIG. 9

FIG. 10 shows a side view of the embodiment according to FIG. 9 in the open state, partly in section,

FIG. 10A is an enlarged sectional view of detail A from FIG. 10

FIG. 11 shows an axial section through a closure for beverage cartons according to the invention,

FIG. 12 the closure according to FIG. 11 in a view from the outside in the closed state,

Figure 13 shows the closed closure of Figure 1 1 in a view from above

Figure 14 shows the closure of Figure 1 1 in a partially opened state and

FIG. 15 shows a completely opened closure according to FIG. 11 with a folded over

Screw cap.

According to the perspective view in FIG. 1, the closure according to the invention consists of a screw cap 10 with a guarantee band, the screw cap 10 essentially consisting of a cap jacket 2 and a head plate 1 which closes the cylindrical cap jacket 2 at the top. At the lower end of the cap jacket 2 there is a guarantee band 3, which cannot be completely separated from the screw cap 10 in the closure according to the invention. Conventional screw caps with a guarantee band only have a single weakening line which, unlike the weakening line 13 shown here, runs without interruption along the entire circumference of the screw cap 10 and represents the dividing line between the screw cap 10 and the guarantee band 3.

A weakening line can generally be a circumferential, uniform material weakening, which can be produced, for example, by an incision that does not completely penetrate the material of the guarantee band 3 or the transition to the cap jacket 2, or it is a completely penetrating the wall thickness of the guarantee band 3 Incision, which is interrupted at certain points by easily breakable bridges.

The present invention deviates from this customary form of screw caps with a guarantee band in that it has two weakening lines 13, 14 which are spaced apart from one another in the axial direction and on the other hand do not extend over the entire circumference of the guarantee band but in an upper one Separator 1 1 of the upper weakening line 13 and in a lower dividing web 12 of the lower weakening line 14 are interrupted.

FIG. 2 shows a side view of the closure from FIG. 1 and FIG. 3 shows a development of the guarantee band 3 over 360 °, ie. H. the ends of the guarantee band shown on the right and left at 0 ° and 360 ° abut and hang together, so that the guarantee band has an overall ring shape. The separation in this development view divides the separator 12 into two parts, although it is actually a single, continuous separator.

The break lines 13, 14 are of different lengths, but are arranged such that they overlap the separating web 11 or 12 of the other weakening line. It is expedient if the centers of the separating webs 11, 12 are diametrically opposite one another, as in the present case at 0 ° and 180 ° in FIG. 3.

If, after opening or unscrewing the screw cap from a bottle neck, the weak connection which initially still exists along the weakening lines 13, 14 is completely separated, the retaining straps 15, 16 formed in the overlap region of the weakening line form an essentially tear-resistant connection between the interruption regions 11, 12. The interruption area 11 is connected to the lower edge of the screw cap and the interruption area 12 is connected to the part of the guarantee tape 3 which remains at its original position and which is located below the weakening line 14. The part of the guarantee band 3 remaining below the line of weakness 14 together with the interruption area 12 still forms a completely circumferential fastening band between the screw cap and the neck of the container, which is in engagement with the bottle neck. The interruption regions 12 and 11 are each connected to one another by remaining retaining straps 15, 16, which are generated by the overlapping sections of the two weakening lines 13, 14, so that the screw cap 10 is effectively connected to the lower section of the guarantee strap and the retaining straps 15, 16 thus remains connected to the bottle neck and is consequently captive.

FIG. 4A shows a closure arranged on a bottle neck in a partially unscrewed state. The connection between screw cap 10 and guarantee tape 3 is cut along both lines of weakness 13, 14. However, since both lines of weakness are interrupted and axially offset from one another at least in their overlap region, a movable connection between screw cap 10 and guarantee band 3 remains via the holding bands 15, 16 generated between the overlapping lines of weakness. It is therefore understood that when the closure or the screw cap 10 is released by a rotational movement in the opening direction with the cap jacket 2, the guarantee band 3 also rotates about the closure axis 50, which is carried along by the retaining straps 15, 16 in the circumferential direction.

Due to the thread pitch, the cap jacket moves axially upwards, while the guarantee band is held on a so-called pilferproof ring 21, which is only hinted at in the figures. 4A, however, the separating webs 11 and 12 and one of the holding straps 15 extending between them can be seen, while the weakening lines 13, 14 are also widened to a large axial distance.

As soon as the screw cap according to FIG. 4A is unscrewed sufficiently far from the thread of the bottle neck, the screw cap can be removed or tilted sideways, as shown in FIG. 4B. FIG. 4C shows a state in which the screw cap 10 has already been tilted or folded over by more than 90 ° with respect to the starting position in FIG. 4A. The tilt angle is defined as the angle between the axis 50 of the container neck and the axis 50 'of the cylindrical internal thread of the cap shell 2, which coincide on the bottle neck when the closure is closed, while in the case of the opened closure according to FIG. 4C, the axes 50, 50 ', starting from the closed position, have been tilted by approximately 150 ° relative to one another.

The interruption region 11 is of particular importance, which simply represents a relatively stable, axial extension of the cap shell 2 due to the connection to the cap shell. By tilting the screw cap according to FIG. 4C, this separating web is also 1 in The shape of a tab-like extension is tilted together with the stable sealing jacket and has already slightly exceeded a horizontal position (perpendicular to the axis 50) in FIG. 4C, the retaining straps 15, 16 being twisted accordingly.

The lower edge 1 1 a of the separating web 1 1 engages with the outside of the bottle neck 20, since the edge 1 1 a due to the tilting of the screw cap and also because of its axial displacement beyond the pilfer proof ring 21 and because of the twisting of the retaining straps 15, 16 is forced to a smaller radius than in the state according to FIG. 4A. An upper flank of the pilfer proof ring 21 which is inclined by approximately 30 ° or somewhat less relative to the closure axis 50 supports the folding movement of the separating web 11 when it slides onto the upper flank of the pilfer proof ring 21

The upper edge of the separating web 11, which is firmly connected to the lower edge of the cap casing 2, accordingly moves to a larger radius than in the initial state according to FIG. 4A. The two retaining straps 15, 16 are twisted and the axial displacement of the upper separating web 11 of the guarantee band additionally leads to an effective reduction in the diameter of the guarantee band including the dividing web 11, in particular in the region of the lower edge 11a.

This lower edge 1 1 a of the separating web 1 1 therefore comes into contact and frictional engagement with the outside of the bottle neck 20, the force occurring between the bottle neck 20 and separating web 1 1 or the edge 1 1 a becoming maximum when the dividing web 1 1 approximately horizontal, d. H. is aligned perpendicular to the bottle neck axis 50. The straps 15, 16 are then under tension.

If the screw cap and the separating web 11 are tilted further, the tension in the retaining straps, which have a certain elasticity, is reduced again somewhat, so that the horizontal position of the separating web 11 defines a dead center. As soon as this dead center is exceeded, the engagement between the separating web 11 and the bottle neck 20 effectively brings about a force which tends to move the screw cap against elastic restoring forces in the retaining straps 15, 16 into the further folded position. Thus, the cap jacket 2 and thus the screw cap 10 as a whole occupies a sufficiently stable position beyond the dead center. The screw cap thus remains in a wide open state even if the bottle neck is rotated or inclined in any direction.

In this position, the cap jacket is sufficiently far away from the bottle neck opening that liquid is poured out of the bottle as well as directly from the bottle can be drunk without the screw cap still held on the bottle neck having a disruptive effect.

The screw cap 10 is preferably tilted in such a way that it is in a sufficiently stable position and the cap jacket 2 is as far as possible from the bottle neck opening. In order to make this possible, for the purposes of the present invention, the pilferproof ring 21 can also be formed on the bottle neck 20 in such a way that the screw cap 10 is pressed radially outward when it is folded over and this leads to a greater torsion of the holding straps 15, 16 and consequently to comes an increase in the tilt angle.

FIGS. 5, 6A, 6B, 7, 8A and 8B show embodiments with pilferproof rings 21 designed in this way.

Figure 5 shows a side view of a closure which is in a folded position. The area in which the separating web 11 engages with the bottle neck 20, more precisely with the pilferproof ring 21, is shown in a cross-sectional view and is shown enlarged in FIG. 6A.

According to FIG. 6A, the profile of the pilfer proof ring 21 is essentially triangular. In this case, the profile can also be described as nose-shaped. A lower flank 22 of the pilferproof ring extends almost perpendicular to the axis of the container neck 50. According to the triangular profile, this lower flank 22 merges with an upper flank 24 in a region of the maximum diameter. The area of the maximum diameter is designed here as a rounded edge, which is also referred to here as a ridge 23 running between the lower flank 22 and the upper flank 24. In the embodiment shown in FIG. 6A, the upper flank 24 is set significantly flatter than the bottle neck 20 than the lower flank. In this case, the upper flank extends at an angle of approximately 30 ° to the axis of the container neck 50.

When the screw cap 10 is screwed on, the upper separating web 11 is now lifted over the ridge 23 in which the pilferproof ring 21 has its maximum diameter. During the subsequent tilting, the holding straps 15 and 16 are twisted, and the lower edge 1 1A of the separating web 11 slides onto the upper flank 24 of the pilferproof ring 21. In this case, the separating web 11 is kept radially outward by the larger diameter D of the upper flank 24 compared to the outer bottle neck diameter d in the area covered by the lower edge 11A of the dividing web 11 than would be possible with the bottle neck diameter d as he otherwise between pilferproof ring 21 and thread 25 and also on the thread base is available. As a result of this effect, the holding straps 15, 16 shown in FIG. 5 experience a greater torsion and the screw cap 10 or its axis 50 'is tilted at a larger tilting angle with respect to the bottle neck axis 50 than without the profile of FIG. 5 and 6A Pilferproofringes 21 would be possible.

In the embodiment shown in Figure 5, the tilt angle is about 150 °.

Another profile of a pilfer proof ring 21 is shown in FIG. 6B. In comparison to the profile shown in FIG. 6A, the upper flank 24 is in this case set even flatter than the bottle neck 20. The upper flank forms an angle of approximately 10 ° with the axis 50 of the container neck. In addition, the upper flank 24 extends over a larger axial section of the bottle neck 20.

Such a profile of the pilferproof ring 21, as shown in FIGS. 6A or 6B, can be structurally determined that the separating web 11 or its lower edge 11a remains on the upper flank 24 and thus on a larger radius lies than without (due to the smaller angle to axis 50) axially elongated flank 24. The larger the radius on which the edge 11 a is held after folding, the more the straps 15, 16 are twisted and the larger the tilt angle of the screw cap 10 in a sufficiently stable end position of the screw cap 10.

FIGS. 7, 8A and 8B show further examples in which the pilferproof ring 21 has such a profile according to the invention or the bottle neck above the pilferproof ring has corresponding additional elements. In FIG. 7, the profile is similar to a trapezoid, the lower flank 22 extending almost perpendicular to the axis of the container neck 50 and the upper flank 24 at an angle of approximately 45 ° to the axis of the container neck 50. The area of maximum diameter 23 extends axially upwards to such an extent that the separating web 11 remains largely below the upper flank 24 and is thus pressed radially outwards and, in relation to contact with the smaller (outer) diameter d of the bottle neck 20, again the tilt angle the screw cap 10 enlarged

FIG. 8A shows a profile of a pilferproof ring 21 which in the lower area is similar to the profile from FIGS. 5 and 6A. The upper flank 24 in the embodiment shown in FIG. 8A merges into a short, cylindrical upper end section 24B, which defines a larger diameter D than the smaller diameter d of the bottle neck, at which the separating web 11 or its lower edge in the folded state Screw cap 10 is present. This ensures, in particular, that the screw cap 10 subsequently has a larger tilt angle in a sufficiently stable end position. Another alternative is shown in Figure 8B. In addition to the pilferproof ring 21, the bottle neck here has an annular projection 26 which is arranged all around the bottle neck above the upper flank 24 of the pilferproof ring 21. The axial position of the projection 26 is so matched to the closure or the screw cap with the separating web 1 1 that this or its lower edge 1 1 a abuts the projection 26 from below and thus the screw cap below in the immediate vicinity of the pilferproof ring is held. Without a jump 29 before the tapes 15 could pull the upper separator and thus the entire screw cap upwards until the edge of the separator hits the thread. There is little space between the lower end of the neck thread and the pilferproof ring and there is very little movement of the separator upwards. Since the thread runs helically upwards, this axial freedom of movement becomes ever greater until it rotates 360 ° with a single thread to the lower thread start at B. 2.7mm pitch also reached almost 2.7mm. Since it is undesirable to allow the screw cap to move closer to the cheek of the person drinking directly from the bottle, this circumferential projection 26 prevents or impedes this upward movement.

FIG. 9 shows a further screw cap, shown partly in section, according to the present invention. The screw cap 10 has the guarantee band 3 on its lower edge and a detail A, shown in section, of the lower region of the screw cap, including the part of an associated bottle neck 20, is shown separately as an enlarged detail in FIG. 9A.

The screw cap 10 in FIGS. 9, 9A and 10, 10A is already very similar to the screw cap shown in FIGS. 5 and 6A with the exception that at least the separating web 11 has a radial thickening 11b at its lower edge, which in this case also extends axially below and at the level of the thickening of the separating web 11 over the entire circumference of the guarantee band 3. In this section, the guarantee band has a greater wall thickness below an imaginary line, which lies between and lies at a distance from the upper and lower weakening lines, than in the case of FIGS. 5 and 6,

The thickening 1 1 b, at the lower edge of the separating web 1 1, has the purpose of keeping the opened screw cap wide open even when using a thread with a thread depth of more than 1.3 mm, as shown, for example, in FIG. 10 is.

The upper weakening line 13 is not present in the region of the separating web 1 1 because of the sectional plane of FIG. 9, the separating web 11 is thus continuously connected to the cap jacket 2. The axial position of the upper weakening line would be approximately at the level of the maximum diameter of the pilfer proof ring 21. The fastening part of the guarantee band is formed by a flexible band. This consists of a radially inner, upwardly folded part 3a and a radially outer flexible band section 3b, which remains stationary on the bottle neck even after the closure has been opened.

As can be seen in FIG. 10A, who likes an enlarged detail of the closure in the opened position. Figure 10 shows, the radial thickening 1 1 b, which rests here in the area of the transition between the upper flank of the pilferproof ring 21 and the bottle neck section lying above it, causes the imaginary radially inner part 1 1 c of the separating web 1 1 (which is a dividing web corresponds without thickening), and in particular its lower edge is pressed more radially outwards by the bottle neck 20 than if the thickening 1 1 b were not present. As a result, the screw cap 10 remains in a stable, wide, for example 140 °, folded position despite the deeper thread profile.

Figures 1 1 - 15 each show the same embodiment of a closure for cardboard packaging, in particular beverage cartons, and are therefore described in connection with each other. One can see in FIG. 1 in section and in FIG. 4 in an external view a lower closure part, which is designated overall by 40 and consists of a flange 31 with a pouring spout 32 attached thereto. The pouring spout has an upper opening and a lower opening, not visible here, which, when the closure is on a cardboard packaging, is initially closed by the surface of the cardboard material in order to prevent any contamination of the container contents.

The flange 1 is glued or welded onto a cardboard 45, the welding presupposing that the cardboard material 45 is provided with a suitable surface coating (e.g. polyethylene).

The lower part 40 of the closure has an external thread 42 onto which the internal thread 41 of a screw cap 10 can be screwed.

The pouring spout 40 also has a further internal thread 31, into which a suitable external thread of a cutting ring 35 engages, which also has cutting elements 33 projecting axially and lying in the closed state according to FIG. 1 directly above the surface of the carton 45. A driver 34 engages with a matching counterpart 36 on the cutting ring 35 when the screw cap is rotated in the opening direction. One can also see on the flange a fixing web 7, which is connected to the lower end of the guarantee band 30 by two easily breakable bridges 6. As can best be seen in FIG. 2, the guarantee band has two cutting lines 18, 19, either through weakened material of the guarantee band 30 or, as defined in the present case by continuous incisions, which are only interrupted by further easily breakable bridges 36 which tear open when the screw cap is opened. The lower cutting line 18 and the upper cutting line 19 overlap one another, in the present case along a circumferential angle of approximately 120 °, and each have a lower interruption section 12 and an upper interruption section 11. When the screw cap 40 is unscrewed, the easily breakable bridges 6 first and very quickly tear, which indicates that the closure has been rotated at least once by a small angle in the opening direction, which may be sufficient for the cutting elements to pierce the cardboard material 45.

When the screw cap 40 is turned further in the opening direction, the easily breakable bridges of the cut lines also tear, but this does not lead to a complete separation of the screw cap from the guarantee tape, since the upper interruption section 11 via the holding straps 15, 16 (only in the figures one each visible) remains connected to the lower interruption section 12, which in turn remains connected to the circumferential, stationary lower part of the guarantee band 30, which in turn is held on the pilferproof ring 35 on the lower closure part 10.

The length of the retaining straps 15, 16, ie the length of the overlapping areas of the cutting lines, is set in accordance with FIG. 4 such that the lower edge of the upper interruption section 11 in the opened and folded-over state of the screw cap 20 engages with the outside of the pouring spout 40 stands and the straps 15, 16 are under tension, so that this position of the screw cap is held by the pull of the straps and the contact of the lower edge of the interruption section 1 1 by the screw cap 40, even if the pouring spout together with the corresponding container is tilted in any direction.

Reference symbol list

1 headstock

2 cap jacket

3 guarantee tape

3a inner flex band section

3b Outer flex band section

10 screw cap

1 1 a lower edge

1 1, 12 dividers

1 1 b radial thickening

13.14 lines of weakness

15.16 straps

20 bottlenecks

21 Pilferproof ring

22 lower edge

23 Maximum diameter range

24 upper edge

24A lower section of the upper flank

24B upper end portion of the upper flank

25 threads

26 head start

50 axis of the container neck

50’’s axis of closure

d bottle diameter without thread profile

D outer diameter of the upper flank or the section above

Claims

Patent claims

1. Closure, consisting of a screw cap (10) with a guarantee band (3), which has at least one cylindrical cap shell (2) with an internal thread and a circumferential band (3) at the lower, open end of the cap shell (2), which is easily tearable along Lines of weakness (13, 14) are connected to the lower edge of the cap jacket, the guarantee band (3) after the tear along the lines of weakness being permanently connected to the cap jacket (2) by means of retaining bands (15, 16), characterized in that the retaining bands (15, 16) are formed by two weakening lines (13, 14) interrupted at least once in the circumferential direction, partially overlapping in the circumferential direction and at least axially spaced from one another at least in the overlapping area, and the separating webs (11, 12) of both weakening lines ( 13, 14) of the other weakening line (14, 13) are preferably bridged at an axial distance.

2. Screw cap according to claim 1, characterized in that each weakening line has exactly one T separating web and the center points of the separating webs (1 1, 12) lie diametrically opposite one another.

3. Screw cap according to one of the preceding claims, characterized in that the separating web (1 1) of the upper weakening line (13) extends over a circumferential angle between 10 ° and 75 °, preferably between 20 ° and 60 °

4. Screw cap according to one of the preceding claims, characterized in that the separating web (12) of the lower line of weakness (14) extends over a circumferential angle between 120 ° and 200 °, preferably between 170 ° and 190 °

5. Screw cap according to one of the preceding claims, characterized in that the width, measured in the axial direction, of the upper separating web (1 1) remaining on the cap jacket (2) is at least half the width of the intact guarantee strip (3).

6. Screw cap according to one of the preceding claims, characterized in that the width measured in the axial direction of the upper separating web (11) remaining on the cap jacket (2) is at least 1.5 mm, preferably at least 2 mm, in particular at least 2.5 and is less than 5 mm,

7. Screw cap according to one of the preceding claims, characterized in that the separating web (1 1) of the upper weakening line has a radial thickening at least at its free lower edge.

8. Screw cap according to claim 7, characterized in that the radial thickening is limited to the outside of the guarantee band and that the radial excess of the thickness relative to the wall thickness of the guarantee band outside the thickening up to 0.6 mm, preferably between 0.2 and Is 0.4 mm.

9. Screw cap according to one of the preceding claims 7 or 8, characterized in that the radial thickening extends over the entire circumference and / or to the lower edge of the guarantee band.

10. Screw cap according to one of the preceding claims, characterized in that the wall thickness of the guarantee band (3) outside a possible radial thickening is between 0.5 and 0.8 mm

1 1. Screw cap according to one of the preceding claims, characterized in that the guarantee band (3) is designed as a flexible band with a radially outer part and a folded-over radially inner part.

12. Screw cap according to one of the preceding claims, characterized in that the minimum distance between the lines of weakness (13, 14) is greater than 1.5 mm, preferably greater than 2 mm and in particular greater than 2.5 mm.

13. Combination of a bottle neck (20) with an external thread and a closure according to one of the preceding claims, characterized in that the outside diameter of the bottle neck (20) above a pilferproof ring (21), the inside diameter of the guarantee band (3) and the width and the circumferential extent of the upper separating web (1 1) are coordinated with one another such that after an opening rotation of the screw cap and the subsequent tilting of the screw cap (10) when the retaining straps (15, 16) twist together with the separating web (1 1), the free one lower edge of the separating web (1 1 a) engages with the bottle neck (20) and is moved over a dead center when a tilt angle of more than 90 ° is exceeded, so that thereafter the outside of the dividing web (1 1) with the outside of the bottle neck (20) comes into contact and the screw cap (10) is stabilized in this position tilted by more than 90 °.

14. Combination according to claim 13, characterized in that the outer diameter of the bottle neck (20) in a region above a pilfer proof ring (21) in which the guarantee band (3) of the closure is arranged by at most 2.5 mm, preferably at most 1, 5 mm smaller than the nominal inside diameter of the guarantee band of (3).

15. Combination according to claim 13 or 14, characterized in that the pilferproof ring (21) has a profile that through a lower flank (22) which is in an axial Section extends at least 80 ° to the bottle neck axis (50), a region of maximum diameter (23) and an upper flank (24) is defined, which extends at an angle of inclination <90 ° relative to the bottle neck axis (50) and below the thread (25 ) of the bottle neck (20) merges into the outer bottle neck diameter, the upper flank (24) or a section of the bottle neck above the upper flank (24) of the profile of the pilferproof ring (21) at least in or up to an axial position, which at a maximum folded position of the screw cap is reached from the lower edge (1 1 a) of the upper separator, has a larger outer diameter than the bottle neck (20) without a thread profile.

16. Combination according to claim 15, characterized in that the difference between the outer diameter (D) of the upper flank or of the section lying above it and the bottle neck diameter (d) without thread profile is at least 0.1 mm, preferably at least 0.3 mm.

17. Combination according to claim 15 or 16, characterized in that the pilferproof ring (21) has a triangular or trapezoidal profile, the base of which is defined by an axially parallel line on the cylindrical outer surface of the container neck and the lower flank of which is at an angle> 80 ° with the Includes axis (50) of the container neck (20), the upper flank of the profile forming an angle <40 °, in particular <30 ° with the axis (50) of the container neck (20).