MXPA99008161A - Edge dispensing closure with mating container - Google Patents

Abstract

An edge dispensing closure (10) for a container (30) in which the closure has a downwardly extending annular plug seal (22) to effectively seal the mouth of the container when the closure is in the fully closed position. The closure also utilizes an inwardly extending leakage seal (24) just above the threads to prevent fluid from the container to leak into and drain down the threads (28). An upper limit bead (34) is formed on the rim (38) of the mouth of the container to prevent the closure from being fully removed from the container and also as an indicator of the fully open position for the aperture formed in the top wall of the closure. The closure can be combined with a tamper indicating band (50) along the lower portion on the annular skirt to indicate that the closure has been removed. Additionally, a child resistant lock can be incorporated in the design such that inwardly extending lugs are formed on the interior of the closure skirt and mating locking lugs are formed on the neck of the container.

Description

COVER FOR SUPPLY BY THE EDGE, WITH COUPLING CONTAINER PREVIOUS TECHNIQUE The present invention relates to a lid for supply, in one piece, for containers and particularly to supply tops containing a cover for supply that is opened by twisting or unscrewing, which is cooperatively structured with the neck of the container. These types of containers are often used to supply liquids or other fluid type products. The lid has a structure that is opened by unscrewing, the unscrewing effects an elevation of the lid, opening a path for the material that is kept in the container to circulate there. More particularly, the present invention relates to covers for supplying closure by screwing / opening by screwing in one piece, having a neck engaging in a container, such that the lid, when opened, reveals a trajectory for liquid from inside the container through the lid. BACKGROUND OF THE INVENTION Many types of caps for delivery have been developed for delivery of liquid or similar material contained within a container such as a bottle. Typically, these jets feature a cover that is permanently fixed to the neck of the container and is screwed there. An opening is also formed in the upper part of these covers, such that when the lid is opened in a threaded form, the opening reveals a path through an inner mouth of the container. For releasing the liquid contained within the container, the lid is screwed to the open position, the container is turned and liquid flows through the neck and mouth of the container and further through the opening formed in the lid, so that the material can be used by the consumer. However, it is evident in the prior art covers of the threaded / threaded opening design that leakage in the threaded area of the container neck remains a problem. This is usually due to the lack of seals or lack of an airtight seal between the lid and the neck of the container. Most lids use what is known as a plug seal to prevent the fluid contained in the container from leaking when the lid is in the closed position. This however fails to prevent fluid from entering the threads when the supply cap is used, emptying fluid from the mouth through the cap itself. Additionally, in these prior art devices, it is difficult to determine when the lid is in the fully open position, or in the fully closed position. Excessive tightening may cause the container to bend the cap seal or possibly deform it. In addition, by opening the lid too far, the passage for the fluid may be excessively stretched and the fluid may be supplied from the lid too quickly or may possibly leak in other areas of the threaded neck of the container. Other types of caps for delivery are substantially well known in the prior art. However, these prior art devices have many of the same problems. First, the leak has been a problem with the supply caps, due to the nature of the caps that consists of threaded to open. It is difficult to prevent leakage of the liquid product stored in the container through the opening or around the threads in the neck of the container. Additionally, an effective means to define the opening limit of the lid is also required, the means require minimal structure already formed in the lid or in the neck of the container. Finally, it is difficult to configure the lid with a device for indication of effective tampering, due to the small rotation of the lid required to allow the through product to circulate.

The patent of the U.S.A. No. 5,111,967, describes a cover for plastic supply, for a container having an opening design in threaded form, threaded closure, this design however uses a softer second plastic to provide an effective seal packing around the top portion of the lid. The application of this second softer plastic requires a dual or co-injection molding process in order to mold the lid with a hard plastic and then mold the softer plastic forming the seal later. This second stage of molding is often prohibitively expensive, time-consuming and inefficient. SUMMARY OF THE INVENTION The present invention is a improved, one-piece, twist-off opening / closure lid for use with a cooperatively structured container neck. It is an object of the present invention to provide an easy-to-use twist-lock closure container for dispensing, having a cap that allows the fluid contained in the container to come out when opened. Additionally, another objective of the present invention is to provide a lid for edge supply, having an opening formed in the upper part of the lid and suitably sealing the neck of the container and the threads against fluid leakage, when the lid is already in the open or closed position. A further object of the present invention is to provide a container having an upper limit strip to indicate the full open limit of the lid and to prevent total thread detachment from the lid and the container. A still further object of the present invention is to provide a cap seal on the cap, to securely and securely seal the mouth of the container when the cap is placed in the closed position. The present invention provides a combination of container and lid for edge supply, in one piece, to achieve the above objectives. A lid is provided having an opening formed in the upper surface of the peripheral edge to allow product passage through when the lid is rotated in the fully open position. In addition, the cap has an annular cap seal, which projects downwardly from the upper interior cap surface to fully engage and seal the lip of the container mouth, when the cap is screwed to the closed position. The present invention combines this feature with an upper limit strip, formed in the upper annular lip of the mouth of the container in addition to a radial seal extending inwardly from the lid and engaging the neck of the container on the thread. The radial seal engages the lip of the mouth of the container just below the upper limit strip, in order to prevent fluid contained within the container from entering the threaded area between the lid and the neck of the container. All of these features are combined in the present invention to fulfill the objectives outlined above. Finally, the present invention comprises a lid for edge supply, for use with a corresponding container, comprising a lid having an interior, exterior and top surface; an annular skirt projecting downwardly dependent on the upper surface, the annular skirt furthermore has threads projecting inwardly from the inner surface of the cap; an annular plug seal projecting down from the interior top surface; an annular leak seal that projects inward from the inside surface of the lid and over the threads; an opening formed on a portion of the junction of the upper surface and the annular skirt extending downwardly of the cap; the container has a neck that extends upwards, the neck has an inner and an outer surface and also has an annular lip formed where the inner and outer surfaces meet; container threads projecting outward from the outer surface of the container neck, in threaded coupling relationship with the threads of the lid; an annular upper boundary strip that flares outwardly from the annular lip of the container neck, wherein the leakage seal of the cap abuts directly against the outside of the neck between the upper limit annular strip and the threads of the container .

BRIEF DESCRIPTION OF THE DRAWINGS A better understanding of the invention will be achieved by reference to the following description in conjunction with the apanying drawings, in which like numbers refer to like parts and wherein: Figure 1 is a sectional side view of the lid and container of the present invention, in the fully open position; Figure 2 is a sectional side view of the lid and container of Figure 1, wherein the lid is in the closed position; Figure 3 is a top view of the lid in the container shown in Figure 1; Figure 4 is a sectional perspective view of the bottom of the lid of the present invention having a lock to prevent tampering by children, of the type of compression and rotation; Figure 5 is a perspective view of the mouth of the container corresponding to the lid of Figure 4; Figure 6 is a top section view of the lid and container of Figures 4 and 5; and Figure 7 is a perspective view of the lid of Figure 2; Figure 8 is a sectional side view of an alternate embodiment of the lid and container shown in Figure 1, wherein the leakage seal and the upper limit strip are illustrated; Figure 9 is a sectional side view of an alternate embodiment of the lid and container shown in Figure 1, wherein only the upper limit strip acts as a seal; and Figure 10 is a sectional side view of an alternate embodiment of the cap and container of the Figure 1, wherein a push-pull closure is used that has no engaging threads on the neck of the container or the interior surface of the lid. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT With reference to Figure 1, a sectional side view of the cover for edge supply, twist opening / twist closure, 10, of the present used in conjunction with a container 30 having a structure of coercion. The edge supply cap 10 has an annular skirt projecting downwards 20, an upper annular skirt 19, upper wall 26 and opening 23. Also in Figure 1 the cover 10 provided with a band for indication of tampering is shown. 50, separated from the wall of the skirt 20. The opening 23 is formed between the bevelled lower wall 27 and the bevelled upper wall 18. The opening is placed over the junction of the upper wall 26 of the lid and the upper dependent annular skirt. 19. The opening 23 provides an inlet to the interior of the lid 10 and the mouth 35 of the container 30, for dispensing product when the lid 10 is raised to the open position as illustrated in Figure 1. The lid 10 has threads directed towards in 28 corresponding with respective outwardly directed threads 36, formed on the outside of the neck wall of the container 32 in the container 30. Corresponding threads 28 and 36 allow the cover to be rotated in such a way that it rises and falls on the wall of the container. neck 32 of the container 30, rotated clockwise and counterclockwise successive of the lid 10. That coupling between the lid 10 and the neck wall of the container 32, allows the lid open and close, with only minimal twisting or turning of the lid itself. As illustrated in Figure 1, the cap 10 has formed inside the upper wall 26, an annular seal projecting downwards 22, which abuts butt directly against the inner mouth 32 of the container, when the cap it is placed in the position of closing by twisting. The sealing seal 22 securely and completely seals the mouth of the container 35, thereby preventing fluid or other material that remains in the container from spilling therefrom. While the plug seal 22 prevents fluid from flowing out of the container 30 when the lid 10 is in the closed position, it also ensures a proper central alignment and clamping of the lid 10 on the neck of the container 32., when the lid is in the counterclockwise position. In this way, the seal 22 has two purposes, the proper seal between the container 30 and the lid 10, and the secure placement and centralized location of the lid 10 in the neck 32. The seal seal 22 can also be achieved by using a comparable equivalent structure, which effectively seals the upper inner surface of closure against the lip 38 such as a foldable gasket or seal. The sealing seal 22 as illustrated in Figure 2 has a curved or cammed surface, such that the sealing engagement of the plug seal 22 against the inner lip 38 of the container is achieved. When the lid 10 is screwed in the closed position, the plug seal means 22, which have a diameter approximately equal to or slightly greater than the lip 38 in order to. provide an airtight seal, slide past the lip 38 and compress against the inside of the neck 32. Thus, in order that the opening 23 of the mouth 35 of the container opens, to allow the product to pass through, the cover 10 is rotated approximately 1/4 to revolution (anything less than full rotation is sufficient), thereby providing flow communication of the opening 23 and the inner mouth 35 of the container. In this situation, lifting the upper wall 26 of the lid 10 from the lip 38 of the neck of the container, releases the plug seal 22. The plug seal 22 must extend sufficiently in the mouth 35, so that during the first opening of the lid 10 of the container and before the band for indication of tampering is removed, a sufficient seal remains preventing fluid from escaping from the interior of the container. Depending on the type of tamper indicating band used on the cap, the cap seal should provide such leakage protection from any point between 1/8 turn, such as when using a tamper-indicating band of ratchet type , until a full turn for when the tamper indicating band is a single lug that contacts a single lug on the neck of the container. In this manner, the plug seal 22 must extend into the mouth 35 to allow this sufficient seal to occur when there is a partial opening. Working in conjunction with the plug seal 22 is the leakage seal 24 extending inwardly from the upper interior portion of the lid 10. As shown in Fig. 1, the leakage seal 24 firmly confines to direct stop against the collar of the upper outer container 37, directly below the annular lip 38. The upper container neck wall 37 is formed on the threads 36 of the container and provides a flat surface for the leakage seal 24 to contact against it. The upper container neck wall has a total vertical length, sufficient to allow the lid to rise in the threads 36 and allow the opening 23 to be completely exposed to the mouth 35 of the container. This vertical distance of the neck wall of the upper container 37 is typically the approximate distance of vertical travel required for full opening of the lid, due to the coaxial structures of both the leakage seal 24 and the upper limit strip 34. The wall of Upper container neck 27, as illustrated in Figure 1, additionally has a reduced inner diameter as compared to the diameter of the lower neck portion of the container containing the threads 36. This reduced diameter of the neck wall of the container 37 it provides suitable surface contact area, as indicated above, by the leakage seal 24, while additionally providing tolerance to form the upper limit strip 34. The reduced thickness of the container neck on the upper neck wall 37 also reduces The amount of material required for forming the container and also increases the mold efficiency to produce the container. The diameter of the leakage seal projecting inwardly 24 in the cap 10 is slightly smaller than the diameter of the outermost point of the upper limit strip 34. This differential in diameter prevents the leakage seal 24 from rising above the strip of leakage. upper limit 34, when the lid is unscrewed, in this way retaining the lid in the container at all times. Still further, the leakage seal 24 prevents fluid or other material that is retained within the container 30 from entering the lower threaded areas between the sealing threads 28 and the container neck threads 36. This leak has historically been a significant problem. both during shipment and use by the consumer, since the fluid can be discharged around the threads 28 and 36 in the upper part or shoulder area of the container 30. The leakage seal 24 is illustrated as a projecting or annular strip projecting inwards from the lid as illustrated in Figures 1 and 2, and works in conjunction with the upper limit strip 34 projecting outward from the annular lip 38 of the container 30, to prevent the lid 10 from being removed from the container neck . As illustrated in Figure 1, when the lid 10 is rotated to the fully open position, the leakage seal 24 and the upper limit strip 34 tightly butt against each other in this way preventing any fluid from entering the threaded area between the neck of the container 32 and the lid 10 and further preventing the lid from opening too much. When the container is in the closed position, as illustrated in Figure 2, the cap seal 22 and the leakage seal 24 both work to hermetically seal fluid retained within the leakage container both outwardly through the opening 23 as to the area between the lid 10 and the neck of the container 32. Figure 8 details another alternative embodiment for the configuration of the product to prevent leakage seal from leaking through the threads of the container and lid. Whereas in Figure 1, the leakage seal member 24 extending inward from the cap provides the single contact and seal surface against the neck wall of the container 32 in the embodiment in Figure 8, the cap for delivery per edge 10b has two seals formed by standard leakage seal 24 in addition to the upper limit strip 34, which when the cover 10b is raised over the threads, firmly contacts against the upper inner closure wall to prevent fluid from being discharged by the thread. Alternately, as illustrated in Figure Ib, only the upper limit strip 34 of the neck of the container acts as a seal to prevent this leakage while the leakage strip or seal projects inwardly from the cover wall, not contact the surface of the neck of the container. This embodiment increases the mold efficiency of the container / lid because it is easier to mold the strip in the container in opposition to the lid. This is one of the preferred embodiments due to the mold efficiency and due to the design as illustrated, it includes the minor strip on the lid in order to resist the removal of the neck cap from the container. As illustrated in both Figures 1 and 2, and more clearly in the perspective view of Figure 5, the upper limit strip 34 is formed in the upper lip of the container neck 32. The upper limit strip 34 is a flange extending outwardly, co-acting with the leakage seal 24 formed in the cap in order to prevent the cap from retracting or unscrewing the threads of the neck of the container 36. This upper limit structure effectively removes the possibility of accidentally removing the lid 10 from the container 30. The upper limit strip 34 is also an indicator of the fully open position of the supply opening 23. As illustrated in Figure 3, the opening 23 of the lid 10 is visible by exposing the annular lip 38 of the neck of the container 32. Additionally, the beveled edges 18 and 27 forming the border of the annular lip 38 are illustrated. On the outer edges of the lid 10 is a plurality of vertically projecting knurled ribs or ribs 21 used to provide a suitable handle on the lid 10., when the user twists the lid to open or close the container. The lid 10 of the present invention as well as the container 30 can be made of a thermoplastic material that is formed or processed by the use of standard extrusion or injection molding techniques. Materials that may be used include but are not limited to: polyvinyl chloride, polypropylene, nylon, PET, polyethylene, cellulose or acrylonitrile, butadiene or polystyrene compounds. As illustrated in Figure 7 and Figure 1, a tamper indicating band 50 is connected to the lower portion of the annular skirt 20 of the lid 10. The tamper indicating band 50 is connected to the annular skirt 20. by a plurality of brittle connectors 51. Typically, 8 connectors are used for the tamper indicating band 50 which is connected to the lower edge of the annular skirt 20. The formation of brittle connections 51 creates windows therebetween. The inwardly projecting annular strip 53 of the tamper indicating band 50 projects inwardly directly under the outwardly projecting tamper indicating strip (TI = Tamper Indicating) 31 formed in the neck. of the container 32 as illustrated in Figure 2. The TI strip 31 is formed on the neck of the container 32 below the threads 36 and on the shoulder of the container 58. The tamper indicating band 50 connected to the skirt 20 provides a indication of whether the lid has been previously opened. The TI strip projects outwardly from the base of the neck of the container 32 as illustrated in Figures 1 and 2, and buttresses against the upper portion of the annular strip 53 of the band 50 in order to prevent the indicator band of tampering 50 rises over the TI strip 31. When the lid 10 is opened for the first time after manufacture, the lid 10 is raised by the threads 36 of the container, thus pressing against the tamper indicating band 50 and especially the upper portion of the strip 53 against the container strip TI 31, breaking the fragile connectors 51 and separating the band 50 from the lid 10 and the dependent annular skirt 20. Turning now to Figures 4, 5 and 6, it is illustrated an alternate embodiment of the lid of the present invention. In this embodiment, the lid 10a is constructed with a feature that aims to avoid manipulation by minors in order to prevent opening of the lid without opposing force applied to the concurrent cover with rotation in the counterclockwise direction. Cushions for compression with a finger or thumb 70 are provided on the outer surface of the lid 10 directly opposite each other. The cushions 70 slightly increase the thickness of the closure skirt 20 at the location where the cushions 70 are formed and provide an indication of compression placement to open the lid. Tetons or fingers for preventing manipulation by minors 72, 73, are formed inside the lid skirt 20"and are angled inwards in order to act against cooperating lugs or lugs 76, 77 formed in the base of the neck of the container 32 During normal opening of the lid, the lugs 72, 73 rotate against lugs or cam surfaces projecting outward 76, 77 in order to prevent rotation in the counterclockwise direction, thereby providing a To avoid tampering by minors, to overcome the feature to avoid tampering by minors, pressure must be applied to the opposing cushions 70 of the lid 10a to deform the skirt 20 and cause the lugs 72, 73 to expand outwardly. they are ideally formed at 90 ° from each of the lugs 72, 73 projecting inwardly from the lid 10a This placement maximizes the deformation efficiency of the lid and thus requires minimal pressure to overcome the feature to avoid tampering while also preventing a child from opening the lid due to the dexterity required in applying opposite compression pressure against the thumb pads 70 while at the same time turning the lid 10a in the counterclockwise direction. In Figure 6, a top cut view of the engagement of the lugs 72 and 73 projecting inwardly from the inner annular skirt 20 of the lid 10a is illustrated. The lugs 72, 73 are coupled with corresponding lugs 76, 77 formed in the base of the neck of the container 32. The cushions 70 are formed at 90 ° offset from the lugs 72, 73 in order to maximize the deformation of the lid skirt. 20 when pressure is applied to the cushions. The lugs 76, 77 have a bevelled or cammed surface, such that, when the lid 10a is tightened on the container neck 32, the lugs 72, 73 easily pass over the lugs 76, 77, when the lid 10a turn clockwise in the direction of the clock. However, when the lid 10a is rotated in the counterclockwise direction, the lugs interact and prevent the lid from opening by edge feeding. Turning to Figure 10, another embodiment of the lid 10 of the present invention is illustrated. Instead of threads that are used in the previous ways to raise and lower the lid, the combination lid and container uses a push and pull function where the lid lOd is raised by simply pulling up the lid for supply by edge lOd . In the push-pull mode shown in Figure 10, the upper limit strip 34 is provided to define the fully open position of the lid lOd by the resistance that is provided against the leakage seal 24. When the push lid pull lOd pulls up to open the opening to release the contents, the upward movement through the lid lOd is interrupted after this contact. A simple push-pull design of the lid lOd shown in Figure 10 still has the effectiveness of the plug seal 22 and the leakage seal 24 combined, to prevent leakage of material or fluid into the space between the container and the container. lid lOd. The foregoing detailed description is given primarily for clarity of understanding and unnecessary limitations will not be understood there by modifications that will be apparent to those skilled in the art upon reading this description and may be made without departing from the spirit of the invention or scope of the invention. appended claims.

Claims (21)

1. CLAIMS 1. A lid for edge supply, comprising: an upper wall having an annular plug seal projecting downward, the top wall having a through-formed opening; an annular skirt that depends on the upper wall; threads projecting inward from the annular skirt; a corresponding container having a neck projecting upwards and having outwardly extending threads that threadably engage the threads of the lid; characterized in that the cover further comprises a leakage seal projecting inwardly from the annular skirt on the threads; and the lid further comprises a band for indication of tampering that depends on the annular skirt.
2. 2. The lid in accordance with the claim 1, characterized in that the leakage seal couples the neck of the container which prevents material contained within the container from leaking to the threads of the container neck.
3. 3. The lid in accordance with the claim 2, characterized in that the neck of the container has a flat upper neck wall on the threads, the leak seal contacts the upper neck wall.
4. The cover according to claim 1, characterized in that the corresponding container has at its uppermost edge an upper limit strip projecting outwards.
5. The lid according to claim 1, characterized in that it also comprises at least one finger tongue, to prevent undue tampering by minors, extending inwardly from the annular skirt; a corresponding lug formed on the neck of the container, below the threads; a pair of opposing thumb pads that form on the annular skirt of the cap to deform the annular skirt; in such a way that the deformation of the annular skirt causes the finger to pass over the lug on the neck of the container.
6. 6. A cover for edge supply, comprising: a circular top wall of an annular plug projecting downwards; the upper wall has a passage formed opening on the outer periphery of the upper wall; an annular skirt that depends on the upper wall; threads projecting inward from the annular skirt; an annular strip extending inwards from the annular skirt on the threads; a corresponding container having a neck projecting upwards and having threads extending outwardly in threadably coupling relationship with the threads of the lid, the neck having an annular lip; characterized in that the corresponding container has an outwardly extending upper limit strip formed in the annular lip of the container neck; wherein the diameter of the upper limit strip is larger than the diameter of the annular strip of the cover; and wherein the lid further comprises a band for indication of tampering depending on the annular skirt.
7. The lid and container according to claim 6, characterized in that the container further has an upper neck wall that extends upwardly flat on the threads of the container.
8. The cover and container according to claim 6, characterized in that the tamper indicating band that depends on the annular skirt is detached from the lid before first removal of the container lid.
9. The cap and container according to claim 6, characterized in that it further comprises: at least one finger extending inwardly of the annular skirt; a corresponding lug formed in the neck of the container below the threads; a pair of opposed thumb pads formed on the annular skirt of the cap to deform the annular skirt; in such a way that the deformation of the annular skirt causes the fingers to pass over the lug on the neck of the container.
10. 10. A lid for edge supply, characterized in that it comprises: an upper wall having plug seal means projecting downwards and having an opening therein formed; an annular skirt that depends on the upper wall; threads projecting inward from the annular skirt; seal means extending inwardly from the annular skirt over the threads; a coupling vessel having an upwardly extending neck and having threads extending outwardly in threadably coupling relationship with the threads of the cap, the neck having an annular lip; and an upper outwardly projecting boundary strip formed in the annular lip of the container neck.
11. The container and lid according to claim 10, characterized in that the lid has a band for indication of tampering connected to the annular skirt, the strip further has a strip extending inwardly.
12. The container and lid according to claim 11, characterized in that the container has a strip projecting outwardly below the threads and on the strip of the tamper indicating strip.
13. The container and lid according to claim 10, characterized in that it further comprises: a pair of opposed compression cushions in the annular skirt; a pair of first parallel tabs formed in a normal relationship with the pads and projecting inwardly from the lid; a pair of second lugs formed in the neck of the container.
14. 14. A container and cover for edge supply, comprising: a lid having an upper wall; an annular skirt extending downwardly dependent on the upper wall, the annular skirt further having inwardly extending cap threads; an annular plug seal projecting down from the top wall; an annular leakage seal extending inward from the annular skirt on the lid threads; an opening formed on the top surface of the lid; a container having a neck projecting upward with an annular lip; container threads projecting outward from the neck of the container; characterized in that the container has an annular upper boundary strip projecting outwardly from the annular lip; where the leakage seal contacts the neck of the container below the upper limit strip and on the threads; and the cap has a tamper indicating band which is frangibly or frangibly connected to the annular skirt.
15. 15. The cap and container according to claim 14, characterized in that the skirt has an outer surface, the outer surface has ribs projecting vertically.
16. The cap and container according to claim 14, characterized in that the cap seal of the cap has a vertical length, the vertical length of the cap seal is less than the vertical distance between the upper limit strip and the formed threads In the container.
17. The cap and container according to claim 14, characterized in that the tamper indicating strip has an inwardly extending strip that contacts a strip extending outwardly on the neck of the container.
18. 18. The cap and container according to claim 14, characterized in that it also comprises at least one cushion for finger compression therein formed; a first pair of tabs projecting inwardly on the lid; a second for outwardly projecting lugs formed in the neck of the container.
19. 19. The lid and container combination according to claim 18, characterized in that the lid is made of a thermoplastic material.
20. 20. The lid and container according to claim 14, characterized in that the opening is formed on a portion of the junction of the upper wall and the annular skirt of the lid.
21. 21. A lid for edge supply, comprising: a circular upper wall having an annular plug seal projecting downward and having a formed through opening; an annular skirt that depends on the upper wall; a coupling vessel having a neck projecting upwards and having an annular lip; characterized in that the cover has a leakage seal that projects inwardly from the annular skirt; the container further has an outwardly projecting upper limit strip formed on the annular lip of the container neck; the neck has a flat upper wall on the threads and below the upper limit strip, the upper wall is contacted by the seal against leakage; wherein the diameter of the leakage seal is less than the diameter of the upper limit strip; and a band for indication of tampering that depends on and is fragile connected with the annular skirt.