EP1140646A1

EP1140646A1 - Hinged closure with tamperproof element

Info

Publication number: EP1140646A1
Application number: EP00900014A
Authority: EP
Inventors: Werner Fritz Dubach
Original assignee: Terxo AG
Current assignee: Terxo AG
Priority date: 1999-01-14
Filing date: 2000-01-04
Publication date: 2001-10-10
Anticipated expiration: 2020-01-04
Also published as: EP1140646B1; DE50000151D1; ATE216677T1; AU1766400A; AR022289A1; WO2000041943A1

Abstract

In plastic closures (1) having a bottom part (2) and a cap (2) forming a single piece with said hinge (4), the tamperproof element (10) is directly formed on the cap. The invention aims at enabling separate manufacturing of the tamperproof element (10) in a more cost-effective and economical manner despite the fact that an additional manufacturing step is required during manufacturing. The tamperproof element (10) consists of an open or closed ring-shaped or clamp-shaped band (11) which is retained with positive or non-positive fit by fixing means (12, 13) on both parts of the closure, i.e. the bottom part and the cap.

Description

Hinge lock with guarantee element

The present invention relates to a plastic closure consisting of a lower part and a cover connected thereto via a hinge axis, as well as an integrity guarantee element.

Integrity guarantee elements on plastic hinge locks have been known for many years. They are intended to offer a high level of security for the consumer by making the integrity of the closure and thus the contents in the container protected by the closure visible. A large number of different variants are known for this. Most closures, especially on plastic containers, are so-called bounced and can practically not be removed from the container without being destroyed. With such closures, however, it must also be ensured that the lid has not already been opened before first use and that part of the contents have thus been removed or third-party substances have been added. Such integrity elements were most often implemented in the form of guarantee bands. From US-A-4 '487' 324 (Ostrowsky) a plastic closure of the type mentioned at the outset with a guarantee of integrity element is known. A tamper-evident guarantee element here is a guarantee band which is attached in one piece to the lower part of the closure and extends over more than half the circumference and is connected to the lower part via predetermined breaking points. The cover, which is movably arranged on the lower part by means of a swivel hinge, has various cam-like projections all around, which engage under the guarantee band between the predetermined breaking points. The main problem of such and similar guarantee elements is that the guarantee band is often destroyed when it is closed for the first time. The result was a high reject rate and fully automatic closing of such closures could only be achieved with very high cycle times. The economy was practically lost.

Only through the solution according to US-A-4'696'408 (WF Dubach according to EP-B-0'210'138) was a solution shown which allowed improved automatic closing. This was realized by a guarantee tape which protrudes upwards at least by its material thickness and the length of the predetermined breaking points over the circumference of the lower part. The guarantee band itself extends to a maximum of half of the Circumference of the closure. On the one hand by the height of the guarantee band and on the other hand by reducing the wrap angle, a considerably improved automatic closure of such closures was made possible.

The US-A-5'392'938 (WF Dubach, corresponding to EP-B-0 '537 ^• 324) for the first time showed hinge locks in which the tamper-evident element was arranged as a band on the cap. Such closures are particularly complex in terms of production technology, but again result in a lower number of rejects when closing the closure. A technical reason for this is practically incomprehensible.

Instead of guarantee bands, other forms of integrity guarantee elements are also known. For example, a plastic closure from the company Expan is known on the market, which shows a vertically standing hook element integrally formed on the lower part of the closure, which engages in a corresponding opening when it is closed for the first time by a pusher on the cover and is separated from the lower part when used for the first time. This somewhat exotic example is extremely complex in terms of production technology and requires the step-by-step closing and demolding of the closure already in the manufacturing process. This is practically no longer possible with tools with sixteen or more cavities. The production of closures with large quantities is out of the question for this solution. In addition, such a guarantee element is not particularly clearly visible. Unless he checks the goods very carefully, the consumer will hardly be able to determine whether a container has already been opened. Accordingly, a significant part of the guarantee effect is lost.

This is achieved much better with the closures according to US Pat. No. 5,497,906. These closures have a break-out seal arranged in the top surface of the lid. After opening such a closure for the first time, the lid has a clearly recognizable hole. Despite the technical ingenuity and the multitude of design options, this closure could not hold its own on the market. This should not least be due to the fact that the clearly visible opening in the lid gave the impression that the consumer had a leaky, defective closure in front of them.

From the recently published US-A-5'829'610 a plastic hinge closure has become known which, as a guarantee element, shows a separately manufactured bolt which is held on the lid of a hinge closure and which can be locked behind elements with elements on the lower part. It is neither clearly recognizable whether an initial use has taken place, nor is the malicious opening and Resealing impossible. Furthermore, the solution is unable to meet the aesthetic requirements. The arrangement of the bolt, which has to work with a barb, also limits the freedom of design enormously.

Virtually all closures on the market today with a guarantee of integrity element are problematic in terms of production technology and require extremely expensive tools. In particular, in order to be removed from the mold, the guarantee bands protruding from the corresponding jacket walls must be supported by half-shell-shaped sliders during the removal from the mold. Accordingly, these injection molds are extremely expensive, complex and subject to high wear. The cup-shaped sliders also tend to deform under the influence of heat. This means that the rolling direction of the steel used must be taken into account during production.

Ultimately, ever higher aesthetic requirements are also placed on plastic hinge locks. For example, a trend can be identified that makes two-tone closures desirable. This calls for so-called two-component injection molding machines, which are extremely expensive and for which there are still relatively few possible uses. It is therefore the object of the present invention to provide a swivel hinge closure made of plastic according to the preamble of claim 1, which can be manufactured extremely inexpensively with simple shapes and can be injected accordingly in a short cycle without having to accept a high reject rate. It is a further object of the present invention to provide a plastic closure whose tamper-evident element can have a different color than the rest of the closure and thus has an increased individualization and an improved visual control for the consumer.

It is a further object of the invention to provide a solution which permits a particularly large number of embodiments and nevertheless permits a certain standardization of the plastic closures.

All these tasks are solved by a hinge closure made of plastic with the features of claim 1.

Various exemplary embodiments of the subject matter of the invention are shown in simplified form in the drawing. It shows :

1 shows a vertical axial section through a hinge closure with a closed, circumferential tamper-evident element and Figure 2 shows the same closure in side view

Figure 3 in supervision while

Figure 4 shows a detail of this plastic closure on a larger scale in section.

Figure 5 shows a second variant of a plastic closure with tamper-evident element in turn as an axial vertical section and

Figure 6 in side view while

FIG. 7 shows the integrity guarantee element with holding part on its own.

Figure 8 shows the same plastic closure after removal of the tamper-evident element.

Figure 9 shows an enlarged detail of the tamper-evident element and the holding part, while

Figure 10 shows a detail of the same closure on a larger scale.

FIG. 11 schematically shows a further example of a plastic closure with a tamper-evident element, this being designed in the form of a clasp, here before assembly and

Figure 12 in the assembled state from above and

Figure 13 in side view.

FIG. 14 shows a further example of a plastic closure in the open state with a separate, clasp-like guarantee of integrity. element that can be placed inside the lock.

Figure 15a shows the same closure in the assembled, intact condition as a partial section on a larger scale, during

15b-d show other cross-sectional variants of the integrity guarantee elements according to the same principle as that shown in FIG. 15a.

FIG. 16 shows a side view of a plastic closure in which a completely circumferential, ring-shaped tamper-evident element is present.

FIG. 17 shows a possible design of the predetermined separation points for the desired destruction of the tamper-evident element, during

Figure 18 shows a variant thereof.

FIG. 19a shows a partial section of a guarantee band, with a stretchable area, here in the unstretched, unassembled state and

Figure 19b in the stretched, assembled state.

Although a number of design variants are already shown here, this is by no means conclusive. The completely new design of a tamper-evident element as a separately manufactured band or clasp-shaped element allows so many design options and combinations of the various elements shown here, that it is only possible to present some of the most basic types here.

With regard to the closure shown here, no conclusion can be drawn about the invention. It is only essential that this is a closure with a pivot axis, and the tamper-evident element makes this pivoting movement impossible as long as the tamper-evident element has not been destroyed or removed. The closure itself can be part of a container, the lower part corresponding to the container part itself or, as usual, it can represent the screw-on or snap-on connecting part with a container. These are usually closures that are placed on containers, in particular containers made of plastic.

The individual exemplary embodiments are described below with regard to their design and mode of operation. From the description of the mode of operation, the construction specialist can see in an obvious manner how he can vary the design form depending on the shape of the closure or the purpose of use while maintaining the same main function.

A first embodiment variant is shown in FIGS. 1-4. This is an absolute conventional plastic closure with a hinge. Whether this is a snap hinge or not is irrelevant to the embodiment. The closure, which is designated in its entirety by 1, comprises, as usual, a lower part 2 and a cover 3 connected in one piece to it, which is connected to the lower part 2 via a pivot hinge 4. The lower part 2 has a cylindrical outer surface and has means on the inner surface for releasable or conditionally releasable connection to a container. In the example shown here, an internal thread 6 is provided. The lower part 2 is closed by a cover surface 8. The top surface 8 is penetrated by a pouring opening 5, for example in the form of a spout. The pouring opening 5 is closed by an annular pin on the inner surface of the lid 3. This pouring gasket 7 can seal against the pouring opening both inside and outside.

A tamper-evident element 10 is shown here as a separately manufactured part, which has the shape of a closed ring or tire. The integrity guarantee element 10 can consequently be made of a different plastic than the closure 1 itself and, of course, in order to produce an increased signal effect, it can have a different color than the color from which the closure 1 itself is made. In order to symbolize this visually, the tamper-evident element 10 was im Cross section shown in black. The structural design of the tamper-evident element 10 can be seen in more detail in FIG. It consists of an actual band 11 which has an upper contact surface 12 projecting perpendicularly from the band and a circumferential, lower flexible retaining edge 13. In principle, the flexible retaining edge 13 can be manufactured in such a way that it is integrally formed so that it projects downwards by the same angle which it now projects upwards to the belt surface 11. Between the band 11 and the flexible retaining edge 13 there is then a thin point which allows the retaining edge 13 to be turned inside out. Such an integrity guarantee element can be placed over the closure from above, the flexible retaining edge 13 being deflected upward during the overturning. For such a configuration of the tamper-evident element 10, the presence of outwardly projecting parts on the cover and lower part is mandatory. As shown here, these can be completely or partially encircling decorative beads, as can be seen in particular from FIG. 4. In this case, the band 11 is held both positively around the two decorative beads and by the flexible retaining edge 13 as non-positively on the closure. With regard to the destruction of the tamper-evident element 10 by means of the tab 14, reference is made to the various possibilities, as shown in FIGS. 16-19 to be described below. The second embodiment, as shown in FIGS. 5-10, is again an embodiment that allows many variants. The actual closure 1 corresponds in its outer design completely to the closure according to FIGS. 1-4. The plastic closure, which in turn is made in one piece, also has the lower part 2 and a cover 3 connected to it via a hinge 4. Here, too, the cover surface 8 is in turn penetrated by a spout-shaped pouring opening 5. To attach the lower part 2 to a container, the lower part 2 is also provided with an internal thread 6 for attachment. In contrast to the previously described example, here the cover surface 8 is provided with a peripheral peripheral recess 15 and has at least one, but advantageously three or more, through openings 16. These penetrations 16 pass through the top surface 8. The actual integrity element 10 is essentially a clasp-shaped clasp, which practically forms an arbitrary wrap angle around the closure 1. The area of the hinge 4 only has to be left free. The clasp-shaped band 11 of the tamper-evident element 10 is connected to a holding element 18 via predetermined breaking points 17. The diameter of the annular holding part 18 corresponds exactly to the outer diameter of the cylindrical closure 1. The predetermined breaking points 17 are formed in the recesses 19 on the holding part 18. The real thing, here clasp-shaped band 11 can enter into a positive connection with the cap in various ways. In the example shown here, in the embodiment according to FIGS. 5 and 10, a peripherally outwardly directed cam 30 on the cover 3 passes through the band 11. In the variant according to FIG . In this case, the band in the area of the pusher is correspondingly narrower. However, it is also possible to provide the tape with hooks directed towards the cover, which engage in corresponding niches in the cover jacket wall. Of course, many other design forms are possible here too, for example to achieve a positive connection between the tamper-evident element and the cover. The connection of the holding part 18 to the lower part 2 of the closure can also be done in many different ways. If, for example, the pouring spout 5 is relatively large, the annular holding part 18 can also hold onto this pouring spout 5 in a form-fitting and / or non-positive manner.

What is particularly advantageous about this embodiment is not only that the tamper-evident element can be designed completely independently of the closure, but also that the holding part 18 remains as a clearly recognizable color ring even after the strip 11 has been removed. This color ring can only be used Serve decoration, but can also be used as a color code. A typical example would be hair shampoo, where the color code can indicate whether it is an anti-dandruff shampoo, a shampoo for oily hair or a shampoo for normal hair. However, it would also be applicable for closures on tubes, where, for example, the color code can provide information about the fat content of a mayonnaise.

In the two solutions previously shown and described in detail, the tamper-evident element 10 was shown once as a closed annular band and on the other hand as an open clasp-shaped band. In the case of the clasp-shaped variant, the band was held in the desired end position by a holding part. In the two following, more schematically illustrated examples, the integrity guarantee element 10 is realized as a spring-elastic clip 110 or 114. Here, the clip can be kept in a spread position in the first closed state, as shown by the embodiment according to FIGS. 11-13, or the clip can be kept in a compressed position in the first closed state, as is the variant according to FIGS. 14 and 15 shows. These two basic types can of course also be manufactured in different design forms, the width of the clasp-shaped band in particular depending on the height of the closure. Furthermore, the wrap angle of the clip can vary, and finally the means for the positive connection of the clip 110, 114 to the upper part or lid can be designed differently.

In the embodiment according to FIGS. 11-13, as already mentioned, an integrity guarantee element is shown in the form of a clip, which is held in a spread position in a spring-elastic manner in the first closed state. A closure 1 can be seen in the top view in the closed state in FIG. 11 above. The separate tamper-evident element 10 is shown below in the unassembled state. In the unloaded state, the unloaded clasp-shaped integrity guarantee element 110 has a diameter that is smaller than the diameter of the closure 1. To assemble the clasp-shaped band, this can be pressed onto the closure from the front, the clasp-shaped band 110 having to be spread at the same time. The clasp-shaped band 110 has, for example, inwardly directed positive-locking parts 111 which are connected to the clasp-shaped band 110 via predetermined breaking points 112. The closure 1 needs correspondingly arranged engagement options 113, in which the form-fitting parts 111 engage in the first closed state or intact state. This form fit is designed in such a way that the form fit parts 111 cannot be disengaged. Before the First opening must therefore be cut through the predetermined breaking points 112. Because the clasp-shaped band 110 encompasses the closure 1 by less than half the circumference, it cannot simply be placed non-positively on the closure. It is precisely the pretension under which the band is held on the closure over the predetermined breaking points to ensure that after the predetermined breaking points have been severed, the tamper-evident element is irreversibly separated from the closure. As the side view of FIG. 13 shows, the tamper-evident element, which extends beyond the parting plane of the closure, is clearly recognizable as an tamper-evident element. Since it, in turn, is manufactured completely separately from the closure, the tamper-evident element can also be injection molded in a different plastic and held in a different color without any problems.

In contrast to the variant according to FIGS. 11-13, in which the tamper-evident element is placed on the outside of the closure, in the variant according to FIGS. 14 and 15a-d the clasp-shaped guarantee band 114 is arranged inside the closure. 14 shows a hinge closure 1 in the open state and underneath it the separately manufactured, non-assembled tamper-evident element as a clasp-shaped band 114. This band has a radius of curvature which is greater than the radius of curvature of the jacket walls of the closure 1. For During assembly, the clip 114 must therefore be pressed together and remains in this compressed position in the first closed state. Of course, this can also be realized in various forms. In the example shown, the band 114 is provided with an outwardly projecting retaining collar 115. The holding collar 115 is connected to the band 114 via a predetermined breaking point 116. The predetermined breaking point 116 is implemented here, for example, as a predetermined breaking seam. The holding collar 115 is dimensioned such that it is held in a form-fitting manner over a jacket wall of the lower part 2 which protrudes from the cover surface 8 of the closure. Both on the inner wall of the lower part and on the inner surface of the cover 3, form-locking means 117 in the form of nose-shaped projections or recesses are provided which fit together with correspondingly opposite parts 118 on the band 114. Such an integrity guarantee element can simply be placed in the open state on the jacket wall of the lower part 2 or the cover 3, depending on the configuration, after which the closure 1 can be closed and the form-locking means 117, 118 come into engagement. If the holding collar 115 projecting outwards is then torn off by pulling on the tab 14, the band 114 is no longer held and relaxes within the closure and jumps from the position 114 'to the position 114 ", as shown in FIG. 14 In the relieved state, the form-locking means 117, 118 are no longer in engagement with one another and the closure can be opened. It is not possible to reclose the closure so that the guarantee position could be readjusted, since the holding collar 115, which clearly shows the integrity, can no longer be brought into the state of curvature which corresponds to the curvature of the casing wall. Such a guarantee element is thus secured against deception.

Here, too, the invention again leaves a lot of scope for different design forms of both the tamper-evident element and the closure adapted to it formally. While the variant shown in FIGS. 14 and 15a shows an integrity guarantee element with a cross-sectional shape of an inverted, upright "h", FIG. 15b shows an embodiment in which the cross-sectional shape of the integrity guarantee element shows an "h" upside down. This solution should be particularly preferred, since it is known that the closure of closures in which the tamper-evident element is arranged on the cover 3 leads particularly little to deformations which lead to rejects.

In a practically the same way, a solution can also be used in which the tamper-evident element has an approximately Z-shaped cross-section, as shown in FIG. 15c. With this variant, the required Shape the form-fit agent 118 particularly well. The same applies to the variant according to FIG. 15d.

A further variable in the design of the integrity guarantee element according to the explanations according to FIGS. 15a-d lies in the local arrangement of the predetermined separation point 116, which is only indicated by an arrow here. The predetermined separation point, which in turn can be formed by a plurality of bridges or by a tearable predetermined separation line, can, as in the variant according to FIG. 15b, lie outside the closure or, as in the other variants, within the closure. The arrangement of the separation points shown here is the preferred location for this, but other positions are also possible.

Finally, it should be pointed out that the connection options of the respective integrity guarantee element with the lower part or with the cover were not shown. Practically all known solution principles, including those that are not shown here, come into question. However, preference will always be given to solutions that do not require gluing or welding.

Figures 16-19 to be described below show details of tamper-evident elements. In principle, these detailed solutions can be implemented in various embodiments of the integrity guarantee element. However, the examples shown here are shown and can be used in particular for implementation in combination with closed, annular bands.

Figure 16 shows a closure with tamper-evident element 10 approximately according to an embodiment as shown in Figures 1-3. The band 11 is fitted snugly over the closure and has a window 160 through which, for example, pusher parts on the lower part and cover 2, 3 pass. Starting from this window 160, a separating strip 161 runs all around in the longitudinal direction, which is delimited on both sides by predetermined separating points or predetermined separating seams. This can be clearly seen in the vertical section according to FIG. 17. A tab 14 is formed on at least one side of this separating strip 161. By pulling this tab 14, the separating strip 161 can be torn out and the band 11 irreversibly disintegrates into two sub-bands. Such a band 11 can be subjected to a relatively high tensile load without the predetermined breaking points 162 thereby being affected. Accordingly, the band 11 can perceive not only a form-fitting but also a force-fitting component in the integrity guarantee position. Instead of separating the tamper-evident element 10 by predetermined separation points in the longitudinal direction of the band, these predetermined separation points or lines can also run perpendicular or inclined to the longitudinal direction of the band 11. This possibility is shown purely for example in FIG. 18. Here, the predetermined separation points 17 are inclined to the longitudinal direction of the band 11.

With closed, ring-shaped tamper-evident elements, the problem with various plastics is that the tensile elasticity is relatively low. This applies in particular to most polypropylenes, which are very common in closure technology. In order to still be able to manufacture closed tamper-evident elements, such as bands 11 designed in the form of a ring, which, in particular, can also hold non-positively on a closure, the band 11 must have at least one stretchable region. Such stretchable or stretchable areas can be achieved by meandering partial areas or by stretching with a large number of openings, so that these openings can spread under tension. Such a band section, which is designated as a whole by 190, is shown in FIG. 19a. A plurality of expandable openings 191 are present within this stretchable band area. These expandable openings 191 open under tension, as can be seen in FIG. 19b. The stretchable or stretchable Band area 190 is delimited by predetermined breaking lines 17. A tab 14 is attached to the lateral ends of the stretchable band section via bendable, bow-shaped webs 192. By pulling the tab 14, the predetermined breaking points 17 perpendicular to the direction of the band 11 can be separated without any problems. Because there are small webs in the band direction in the area of the predetermined breaking points, with a very small cross-section, the molecular chains are aligned in this area and accordingly these webs withstand relatively high tensile forces in the direction of the webs or the molecular chains. By pulling on the tab 14, however, a force is exerted perpendicularly to this direction, which causes a notch effect on the molecular chains and accordingly the predetermined breaking points can be easily separated.

The variant of an integrity guarantee element with a stretchable or stretchable area, as shown in FIGS. 19a and 19b, can also be combined with clasp-shaped elements which are held under prestress on the lower part and cap.

Despite the need for increased security of the packaging, which is guaranteed by plastic closures with tamper-evident elements, there is always the need for the customer to have their packaging as individualized as possible. Just the present invention allows the relatively expensive closure to be standardized to a large extent and only individualized by means of the specially manufactured tamper-evident element. None of the products previously known on the market allow such a degree of individualization. This means that the expensive tools for the closures can be amortized better, while the shapes for the tamper-evident elements can in many cases be extremely simple, and consequently an individual tamper-evident element can also be produced for relatively small quantities. In this way, the closures can no longer be brought into the first closed position in one operation, but require a separate assembly machine for this purpose; because, on the other hand, the injection molds are considerably cheaper, they do not have to have any complicated closing mechanisms and because the thin points for the predetermined breaking points on the closure itself are eliminated, the cycle time per injection process can be reduced considerably. The assembly machines themselves normally allow such high productivity that a single assembly machine is sufficient to process the production of several injection molding machines.

The integrity guarantee elements according to the invention can also be made particularly large. This gives them an increased signal effect. This signal effect can be extremely emphasized by the fact that the security guarantee element can easily be made in a different color or from a different material than the closure. Without the expensive purchase of a two-component injection molding machine, a two-tone plastic closure can be achieved that can meet the highest aesthetic requirements.

Claims

claims

1. Plastic closure (1) consisting of a lower part (2) and a cover (3) connected to it via a hinge axis (4), as well as a tamper-evident element (10), which in the first closed state engages the lower part (2) and cover (3) and / or form-fittingly irreversibly secures against pivoting movements about the hinge axis (4), characterized in that the tamper-evident element comprises at least one open or closed, ring-shaped or clasp-shaped band (11), which is an element manufactured separately from the lower part and the lid, wherein in assembled condition, the guarantee tape with the holding means holds itself positively and / or non-positively on the lower part and cover.

2. Plastic closure according to claim 1, characterized in that the tamper-evident element (10) comprises a closed, annular band (11) extending around the entire circumference of the closure (1).

3. Plastic closure according to claim 1, characterized in that the tamper-evident element (10) is a band comprising a partial circumference of the closure

(11,110).

4. Plastic closure according to claim 1, characterized in that the tamper-evident element (10) is a band (10, 11, 12, 13) engaging like a clamp on the cover and lower part.

5. Plastic closure according to claim 2, characterized in that the closed annular band (10) has at least one irreversibly stretchable area (190).

6. Plastic closure according to claim 3, characterized in that the band is designed as a spring-elastic clip (110).

7. Plastic closure according to claim 6, characterized in that the clasp (110) is held in a spread position in the first closed state. (Fig. 12)

8. Plastic closure according to claim 6, characterized in that the clasp is held in a compressed position (114 ') in the first closed state.

9. Plastic closure according to claim 1, characterized in that the tamper-evident element (10, 114) is made in one piece with a holding part (18, 115) which can be fastened to the lower part (2) or lid (3) before the first closing.

10. Plastic closure according to claim 9, characterized in that the integrity guarantee element (10) is connected to the holding part (18) via at least one predetermined separation point (17, 116).

11. Plastic closure according to claim 9, characterized in that the holding part is a holding collar (115) which extends between the lower part (2) and cover (3) to the outside.

12. Plastic closure according to claim 11, characterized in that the tamper-evident element has the cross-sectional shape of an inverted "h", which is positively and / or non-positively attached to the outer wall of the lower part (2). (Fig. 15a)

13. Plastic closure according to claim 11, characterized in that the integrity guarantee element has the cross-sectional shape of an upside-down "h" and encompasses the casing wall of the closure cover in a form-fitting and / or non-positive manner. (Fig. 15b)

14. Plastic closure according to claim 11, characterized in that the tamper-evident element has the cross-sectional shape of a "z" rotated by 90 °.

(Fig. 15c)

15. Plastic closure according to claim 11, characterized in that the tamper-evident element has the cross-sectional shape of an "L". (Fig. 15d)

16. Plastic closure according to claim 9, characterized in that the holding part (18) is an irreversibly attachable to the lower part (2) of the closure, preferably an annular plate.

17. Plastic closure according to claim 16, characterized in that the annular plate (18) forms the bearing surface for the cover (3) in the closed state of the closure.

18. Plastic closure according to claim 1, characterized in that the lower part (2) and cover (3) have peripheral protruding molded parts which are positively encompassed by a band or a clasp.

19. A plastic closure according to claim 9, characterized in that the lid has a cover circumference projecting pusher (31) which engages through a recess (30) on the tamper-evident element, which is in engagement with the lower part via the holding part.

20. Plastic closure according to claim 1, characterized in that the tamper-evident element comprises a tear-open tab (14).

21. Plastic closure according to claim 1, characterized in that the tamper-evident element (10) has a different color from the other parts of the closure (1).

22. Plastic closure according to claims 9 and 21, characterized in that both the holding part (18) and the tamper-evident element (10) have a different color from the remaining closure parts (2, 3), and that after the tamper-evident element has been removed in the closed state, the holding part (18) remains partially visible and thus enables color identification. (Fig. 8)

23. Plastic closure according to claim 1, characterized in that the tamper-evident element is divisible in its longitudinal direction by means of predetermined separation points or predetermined separation lines. (Fig. 16.17)

4. Plastic closure according to claim 1, characterized in that the tamper-evident element can be separated perpendicularly or inclined to its direction of longitudinal extent via predetermined separating lines or points (17). (Fig. 18, 19a and b).