EP2038183B2 - Twist-off cap - Google Patents

Abstract

The cap (2) has a circular disc-shaped top plate (2d) with an inner side on which an annular sealing lip (2g) is integrally formed. A cap mouthpiece (2n) is laterally formed at an outer side of the cap. An outlet opening (2k) opens out in the mouthpiece. A drinking channel forms a fluid conducting connection between the opening and the mouthpiece. A cylindrical outer cover (2a) has a guide (2b) formed with another guide that is rotated outwards. The shell is formed such that the cap is fastened to a container mouthpiece around a rotational axis (D). The cap is made of plastic.

Description

The invention relates to a rotary closure cap made of plastic for a container having a container mouthpiece.

There are plastic closures for beverage containers are known, which allow drinking from the container without the plastic closure is previously completely removed from the container. Particularly attractive and therefore also very popular are plastic closures that allow drinking "through the plastic closure". Such a plastic closure, for example, the document discloses US 5,975,369 , This plastic closure consists of several parts, and forms between the mouthpiece and the interior of the container a re-sealable drinking channel. Such plastic closures enjoy increasing popularity because they are easy to use, and also allow easy and comfortable drinking. However, such plastic closures have the disadvantage that the production of the cap is complicated and therefore relatively expensive. This plastic closure is also suitable for pressurized drinks only limited.

The document US 3,261,513 discloses a plastic closure provided for dispensing creamy substances to allow hygienic removal of the creamy substance from a container. This plastic closure is not suitable as a closure of a drinking container to allow drinking "through the plastic closure" through. Even with heavy sucking on the plastic closure, the liquid contained in the drinking container could hardly be removed. In addition, this plastic closure is not suitable for a pressurized drink. This plastic closure is therefore not suitable for a pleasant drink.

The document US 2001/0017306 discloses another plastic closure for a beverage container. This closure is relatively unpleasant to drink, especially with carbonated drinks. Before or during drinking, the drink can spill. In addition, the production of the closure is relatively expensive and the application of the closure is very limited.

It is therefore an object of the present invention to form a rotary closure cap, which is economically advantageous to manufacture, which is also closed again, is easy to use, and allows a pleasant drink.

This object is achieved with a rotary closure cap having the features of claim 1.

The dependent claims 2 to 14 relate to further, advantageously designed rotary closure caps.

The rotary closure cap according to the invention has the advantage that, depending on its rotational position between the container mouthpiece and the cap mouthpiece, a fluid-conducting channel is opened or closed, so that the rotary closure cap can be opened or closed by simply turning it without the rotary closure cap completely from the container remove is. The rotary closure cap according to the invention enables drinking via the cap mouthpiece "through the plastic closure". The outlet opening extends in a circular arc in the circumferential direction of the top plate, which results in the advantage that the outlet opening is relatively long, so that a sufficiently large amount of liquid for pleasant drinking through the outlet opening can escape from the container. The outlet opening is also sufficient space for the intake of air available, which enters the container, so that the inventive rotary closure cap allows a comfortable and continuous drinking. In addition, the rotary closure cap is integrally formed, so that it is very inexpensive to produce. The rotary cap is suitable for so-called still drinks, as well as pressurized drinks, especially carbonated drinks. Since the rotary closure cap on the inside has an annular circumferential, one-piece sealing lip, which rests in the closed state on the inside of the container neck, and thereby achieves an excellent sealing effect, the rotary closure cap is particularly suitable for pressurized beverages. The rotary closure cap preferably has a stop, so that the angle of rotation is limited and the rotary closure cap can not be completely removed from the container. The cap mouthpiece is preferably not centrally symmetrical with respect to the rotary cap but laterally to allow a comfortable drinking.

In an advantageous embodiment, the container mouthpiece has an external thread and the rotary closure cap a correspondingly adapted internal thread, so that the rotary closure cap during the rotation is also raised, thereby releasing a larger passage opening.

In a particularly advantageous embodiment, the rotary cap fits on a container with standardized container neck or standardized container neck. A standardized container neck is understood to mean a container neck with geometry usually prescribed by international standards. The vast majority of bottles used in the beverage industry today are provided with a standardized container neck on which a standardized rotary closure cap can be placed. The mouth geometry of standardized container necked mouthpieces is defined for example in standards of the PCO (Plastic Closure Only) or BPF (British Plastics Federation). The PCO mouth geometry is particularly suitable for containers with plastic screw caps. These plastic screw caps are suitable for closing bottles with both still and carbonated drinks under pressure. Such a standardized container neck, configured as a so-called PCO 28 neck, is disclosed in U.S. Patent Nos. 5,417,866 and 4,294,866 FIG. 3 shown. In addition to the in FIG. 3 illustrated neck with a diameter of 28 mm other common standard diameters are used, such as diameters of 26, 37, 38 or 40 mm. The inventive rotary closure cap can according to the neck FIG. 3 adapted as PCT-28 closure with 28 mm diameter or, depending on the geometry of the neck in other standard diameters are made.

The rotary closure cap according to the invention for standardized container necked mouthpieces has the advantage that the bottles produced in large quantities can be easily equipped with the attractive rotary closure cap according to the invention. With regard to technical properties such as handling, pressure resistance, etc., the rotary closure cap according to the invention is preferably completely compatible with the standardized rotary closure caps hitherto used in connection with standardized container necked mouthpieces. According to the invention, the cap mouthpiece of the rotary closure cap extends perpendicularly to the top plate or in the direction of the axis of rotation of the rotary closure cap within the surface of the top plate, with the result that the cap mouthpiece does not project radially beyond the cylindrical jacket of the rotary closure cap. This results in the advantage that the automatic placement machines used for closing containers which place the closure cap on the container need not be modified. Existing automatic placement machines or filling lines can therefore be used without modification for closing containers with the rotary closure cap according to the invention.

Since the rotary closure cap according to the invention is designed in one piece, there are hardly any additional costs for its production, so that a novel rotary closure system can be offered with the rotary closure cap according to the invention, which is extremely easy to operate, which conveys a novel drinking experience and which is extremely cost-effective. Because the inventive rotary cap can be placed on a standardized container mouthpiece, the Umstellkosten for equipping the container with the inventive rotary closure cap are extremely low. The rotary closure cap according to the invention thus makes it possible to create substantial added value by creating, through negligibly small additional costs, an extremely attractive beverage packaging for consumers, with a standardized beverage container and the attractive rotating closure cap.

Fig. 1

eine perspektivische Ansicht einer Drehverschlusskappe;

Fig. 2

eine Draufsicht der Drehverschlusskappe;

Fig. 3

einen Längsschnitt durch ein bekanntes, standardisiertes Behältermundstück;

Fig. 4

einen Längsschnitt durch eine weitere Drehverschlusskappe entlang der Schnittlinie A-A gemäss Figur 2;

Fig. 5

einen Längsschnitt durch ein Drehverschlusssystem in geschlossenem Zustand entlang der Schnittlinie B-A gemäss Figur 2;

Fig. 6

einen Längsschnitt durch das Drehverschlusssystem in geöffnetem Zustand entlang der Schnittlinie B-A gemäss Figur 2;

Fig. 7

eine perspektivische Ansicht eines Drehverschlusssystemes mit Drehverschlusskappe und Abdeckung;

Fig. 8

eine Draufsicht einer weiteren Drehverschlusskappe;

Fig. 10

eine Draufsicht einer weiteren Drehverschlusskappe;

Fig. 11

eine Detailansicht einer Dichtungsstelle einer weiteren Drehverschlusskappe;

Fig. 12

die in Figur 11 dargestellte Drehverschlusskappe in angehobener Stellung;

Fig. 15

eine perspektivische Ansicht eines weiteren Ausführungsbeispieles eines Drehverschlusses;

Fig. 16

einen Längsschnitt des in Figur 15 dargestellten Drehverschlusses, welcher auf einen Behälterhals aufgesetzt ist, in Geschlossenstellung;

Fig. 17

einen Längsschnitt des in Figur 15 dargestellten Drehverschluss in Offenstellung;

Fig. 18

in einem Längsschnitt ein weiteres Ausführungsbeispiel eines Drehverschlusses mit Sicherheitsband;

Fig. 19

schematisch einen Längsschnitt eines weiteren Ausführungsbeispieles eines Drehverschlusssystems.

The invention will be explained in more detail with reference to several embodiments. The circumferential angles of the first side wall shown in these embodiments do not correspond to the claimed in claim 1 area. The figures show:

Fig. 1

a perspective view of a rotary closure cap;

Fig. 2

a plan view of the rotary closure cap;

Fig. 3

a longitudinal section through a known standardized container mouthpiece;

Fig. 4

a longitudinal section through a further rotary closure cap along the section line AA according to FIG. 2 ;

Fig. 5

a longitudinal section through a rotary closure system in the closed state along the section line BA according to FIG. 2 ;

Fig. 6

a longitudinal section through the rotary closure system in the open state along the section line BA according to FIG. 2 ;

Fig. 7

a perspective view of a rotary closure system with Drehverschlusskappe and cover;

Fig. 8

a plan view of another rotary closure cap;

Fig. 10

a plan view of another rotary closure cap;

Fig. 11

a detailed view of a sealing point of another rotary closure cap;

Fig. 12

in the FIG. 11 illustrated rotary closure cap in the raised position;

Fig. 15

a perspective view of another embodiment of a rotary closure;

Fig. 16

a longitudinal section of in FIG. 15 shown rotary closure, which is placed on a container neck, in the closed position;

Fig. 17

a longitudinal section of in FIG. 15 illustrated rotary closure in the open position;

Fig. 18

in a longitudinal section a further embodiment of a rotary closure with security tape;

Fig. 19

schematically a longitudinal section of another embodiment of a rotary closure system.

FIG. 1 shows a perspective view of an embodiment of a rotatable about a rotation axis D rotary cap 2 made of plastic, consisting of a cylindrical shell 2a in the basic shape and a substantially circular disc-shaped top plate 2d with a circular arc in the circumferential direction of the top plate 2d extending outlet opening 2k, wherein the outlet opening 2k is divided by a plurality of circumferentially spaced webs 2w. In the illustrated embodiment, the webs 2w extend within the outlet opening 2k. However, the webs 2w may, for example, also run directly above the outlet opening 2k, in that the lower edge of the webs 2w extends at the level of the surface of the top plate 2d, so that the outlet opening 2k is designed as a slot in the circumferential direction, and the webs 2w immediately above the surface of the Head plate 2 d, the outlet opening 2 k cross, and thereby form a connection between the top plate 2 d and the first side wall 2 q. The outlet opening 2k opens into the interior of a drinking channel 2p.

The drinking channel 2p forms a fluid-conducting connection between the outlet opening 2k and a mouthpiece 2n to which the lips are applied during drinking. The drinking channel 2p can be designed to extend in a wide variety of ways and be configured with differently shaped mouthpieces 2n in order to fulfill its function as a fluid-conducting channel. In the illustrated exemplary embodiment, the drinking channel 2p is formed by two differently curved side walls 2q, 2r running parallel to the axis of rotation D or perpendicular to the top plate 2d, the first side wall 2q concentric with the axis of rotation D, and the second side wall 2r having a larger circular diameter identifies as the first side wall 2q. These side walls 2q, 2r are not projecting beyond the cylindrical shell 2a. The rotary closure cap 2 also includes a security band 21, which is connected via predetermined breaking points 2t with the jacket 2a.

FIG. 2 shows the in FIG. 1 illustrated rotary closure cap 2 in a plan view. The top plate 2d has an outlet opening 2k which runs in the circumferential direction in a circular arc, with eight outlet openings 2k arranged juxtaposed, concentric with the axis of rotation D, and separated by webs 2w. The cap mouthpiece 2n has a lens-shaped outer cross section. Under lenticular outer cross-section is understood a cross-section, which consists essentially, as shown, of two pitch circles or two concave part walls, wherein the pitch circles preferably have a different radius of curvature. A cap mouthpiece 2n having such a lenticular outer cross-section feels very comfortable to drink, because the lip can be set very pleasant. The cap mouthpiece 2n is inventively designed such that the first side wall 2q extends over a circumferential angle of 30 degrees to 90 degrees. The cap mouthpiece 2n could, from the in FIG. 2 View shown, also be designed in a circular sector or circular segment.

FIG. 3 shows in a longitudinal section a known from the prior art container neck 3, which standardized mass, a standardized geometry, and in particular a standardized container mouthpiece 3a with a standardized arrangement of external thread 3d, Garantiebandring 3e and neck flange 3j has. The majority of commercial beverage bottles is configured with such a container neck or similar 3, wherein the container neck 3 is connected to a container, not shown, for example, a plastic bottle such as a PET bottle, an aluminum container or a beverage carton packaging. The outer side of the container neck 3 has a guide 3d projecting over the outer surface 3c and configured as a circumferential external thread 3d, which extends over a length of, for example, approximately two revolutions. The external thread 3d extends along the upper half of the outer surface 3c. Along the lower half of the outer surface 3c, a circumferential Garantiebandring 3e and below a circumferential Flaschenhalsring 3j are arranged. This embodiment corresponds to a standardized container neck 3, in English as "PCO neck" (plastic closure only).

The external thread 3d can be designed to be continuously circumferential, or can also have regularly spaced interruptions in order to form a pressure discharge channel extending in the direction of the axis of rotation D.

FIG. 4 shows a longitudinal section through the rotary closure cap 2 along the section line AA. On the inner side 2e of the top plate 2d an annular circumferential, one-piece sealing lip 2g is formed. The outlet openings 2k are arranged with respect to the rotation axis D in the radial direction outside an inner area 2y enclosed by the circumferential sealing lip 2g, namely in the inner area 2v, whereby this inner area 2v can extend, starting from the sealing lip 2g, to a sealing section 2c within which the outlet openings 2k could be arranged. According to the invention, the outlet opening 2k extends directly along the sealing ring lip 2g, or along the sealing ring lip 2g, which is radially outer with respect to the axis of rotation D. This results in the advantage that the liquid flowing out of the container neck 3 via the outlet opening 2k is hardly or only slightly deflected, which results in a low flow resistance, so that the liquid can flow out relatively quickly and relatively laminarly. The section line AA runs through the web 2w, so that the outlet opening 2k is shown by dashed lines. The web 2w has the same wall thickness as the top plate 2d. Outside the sealing lip 2g an annular groove 2j is arranged. On the inside of the shell 2a, an internal thread 2b is arranged, which preferably has interruptions 2i. In a preferred embodiment, on the inside of the jacket 2a, a stop 2u projecting against the inside is additionally arranged, which strikes against the external thread 3d above a certain rotation of the rotary closure cap 2 and prevents further rotation of the rotary closure cap 2. The stop 2u can be configured in a variety of ways, for example as a circumferential ring. The stop 2u can also be configured such that it makes the rotation of the rotary cap 2 difficult but not prevented. Thus, when opening the rotary cap 2 can be felt, from which angle of rotation the stop 2u acts, that is, the rotation of the rotary cap 2 requires more force. This is preferably used as a feedback signal to indicate that the port 34b is fully open. In an advantageous embodiment, the rotary closure cap 2 can be further rotated with greater effort until it can be completely removed from the container 3. This embodiment has the advantage that the rotary cap 2 can also be completely removed, and the container 3 can thus be emptied or filled as previously known manner.

The lower end portion 2s of the shell 2a is configured as a sealing portion 2c, with a flexible portion 2o designed as a thin spot. The safety belt 21 has a plurality of circumferentially spaced retaining webs 2m, each having a support surface 2h. The security band 21 is connected to the shell 2a via non-visible predetermined breaking points located behind the retaining webs 2m.

FIG. 5 shows in a longitudinal section along the section line BA the in FIG. 4 illustrated rotary closure 2, which is arranged on the container neck 3 and this tightly closes. The sealing lip 2g rests against the inner surface 3b of the container neck 3 over its entire circumference, so that the container neck 3 is tightly closed. In the exemplary embodiment shown, the sealing section 2c extends peripherally on the tamper-evident ring 3e, so that a sealing point 34a is formed between the sealing section 2c and the tamper evident ring 3e, and a cavity 34 closed against the bottom is formed between the container neck 3 and the rotary closure cap 2. The bearing surfaces 2h of the retaining webs 2m are at the bottom of the tamper evident ring 3e. The flexible portion 2o serves, in particular, for the lower section to expand onto the container neck 3 during the bouncing or screwing on of the rotary closure cap 2, so that the security band 21 and in particular the holding webs 2m slide over the guarantee band ring 3e without being damaged.

FIG. 6 shows that in FIG. 5 illustrated rotary closure system 1 in the open state. The rotary closure cap 2 was raised by rotation about the axis of rotation D, at least until a passage opening 34b is formed between the container neck 3 and the sealing lip 2g, via which the fluid in the container can escape into the drinking channel 2p along the outlet opening 2k. The maximum possible stroke of the rotary closure cap 2 in the direction of the axis of rotation D is preferably limited by the stop 2u. The sealing section 2c is preferably configured such that the sealing point 34a is also fluid-tight, liquid-tight or at least partially liquid-tight, even when the rotary closure cap 2 is open, in order to prevent leakage of the liquid in the region of the guarantee strap ring 21. During rotation and lifting of the rotary closure cap 2, the bearing surfaces 2h bear on the underside of the guarantee band ring 3e, so that the predetermined breaking points 2t break during the opening of the rotary closure cap 2 at some point.

In a further embodiment of the rotary closure cap 2, the sealing section 2c could also be dispensed with. If no sealing is required in the region of the guarantee band ring 3e, the lower region of the rotary closure could also be provided with a guarantee band ring 21, which has no holding webs 2m, and which rests directly on the underside of the guarantee band ring 21.

In a particularly preferred embodiment the rotary closure cap 2 according to the invention is designed for use with a standardized container neck, and advantageously also has the same sealing properties as the previously used, standardized rotary closure caps. Since the inventive rotary closure caps 2 serve as a substitute for previously used, standardized rotary closure caps, the inventive rotary closure caps 2 should also be suitable in particular for pressurized, carbonated drinks. In order to form a rotary closure cap 2 with excellent mechanical properties, in particular also pressure-resistant properties, the outlet openings 2k are advantageously separated from one another by webs 2w, wherein the webs 2w in the course direction of the rotation axis D preferably have the same thickness as the top plate 2. Give these webs 2w the rotary closure cap 2, despite the outlet openings 2k excellent mechanical stability, especially against deformation, so that the rotary cap 2 is also suitable for carbonated, pressurized drinks.

FIG. 7 shows in a perspective view of a rotary closure system 1 with container neck 3 and fastened thereto rotary closure 2, wherein the mouthpiece 2n is protected over a cover 5 or cap 5 slipped over from contamination.

FIG. 8 shows a plan view of another rotary closure 2 with an outlet opening 2k, which, divided by webs 2w, has four separated part outlet openings. The outlet 2k must, as out FIG. 5 or 6 can be seen, always arranged so that they penetrate the rotary closure 2 somewhere in the region between the sealing lip 2 g and the sealing point 34 a. Within this area, an outlet opening 2k may be subdivided and arranged with any desired number of webs 2w in such a way that it opens into the mouthpiece 2n forming the outlet channel 2p.

FIG. 10 shows a plan view of another rotary closure 2, which has a single, circular arc extending over an angle, designed as an elongated hole outlet opening 2k. Such a rotary closure 2 is preferably suitable for closing containers without overpressure. The in the figures, eg Fig.2 . 8th or 10 , illustrated outlet opening 2k extends in the circumferential direction according to the invention over an angle of at least 30 degrees.

FIG. 11 shows in a longitudinal section a detail view of another embodiment of the sealing portion 2c. This is configured such that when the rotary closure cap 2 is completely closed, a passage opening 34c is formed between the container neck 3 and the rotary closure cap 2 in order to pressurize the gas in the interior of the container 3 when the rotary closure cap 2 is opened along the cavity 34 via the passage opening 34c to lead to the outside. The sealing portion 2c, as shown in the detail view FIG. 12 can be configured in such a way that, when the rotary closure cap 2 is raised in the direction of rotation of the rotary axis D, it bears all around on the guarantee band ring 3e, thereby forming a sealing point 34a, so that preferably no liquid can escape via this sealing point 34a.

The FIGS. 15, 16 and 17 show a further embodiment of a rotary closure 2, which, in contrast to the in the FIGS. 5 and 6 illustrated embodiment, has no thread, and therefore during rotation about the rotation axis D also performs no lifting movement.

FIG. 16 shows the rotary closure 2 in a longitudinal section in the closed state and FIG. 17 the twist lock 2 rotated 180 degrees in the open state. The container mouthpiece 3a has a circumferential guide 3d and a circumferential bottle neck ring 3j. The rotary closure 2 has a circumferential guide 2b, which encloses the circumferential guide 3d and is rotatably mounted with respect thereto. The rotary closure 2 has on the inner side 2e of the top plate 2d an annular peripheral, one-piece sealing lip 2g, which has an offset in the direction of the rotation axis D. The container neck 3 has a course simulated similar to the course of the sealing lip 2g, with an end face 3m, which also has an offset in the direction of the rotation axis D in the circumferential direction. The rotary cap 2 has, as in FIG. 15 illustrated, an outlet opening 2k on, with a plurality of the outlet opening 2k in sub-openings dividing webs 2w. The outlet opening 2k penetrates the top plate 2d and / or the shell 2a, wherein this outlet opening 2k arranged between the sealing lip 2g and the internal thread 2b extending are arranged, and the mouthpiece 2n is arranged accordingly adapted so that the outlet opening 2k opens into the mouthpiece 2n. The sealing lip 2g abuts against the inner surface 3b of the outlet port 3g over the entire circumference, so that the outlet port 3g is completely sealed.

FIG. 17 shows the opposite to the arrangement according to FIG. 16 The sealing lip 2g and the end face 3m are designed so that they extend mutually adapted to form a passage opening 34b between them in the illustrated open position, so that between the drinking channel 2p, the outlet opening 2k and the Through opening 34 b forms a fluid-conducting channel in the interior of the container neck 3.

The in the FIGS. 15 to 17 shown rotary closure 2 preferably has a stop in order to limit the opening and closing to a rotational range of, for example, 180 degrees. An advantage of this rotary closure 2 is the fact that it can be opened and closed as often as desired. The plastic rotary closure 1 can also be designed such that it is completely opened at a different angle of rotation than 180 degrees, for example at 45 degrees, 90 degrees or 270 degrees, ie the passage opening 34b has a maximum cross section. For this purpose, it is necessary to adjust the course of the sealing lip 2g and the course of the end face 3m in the circumferential direction to the rotation axis D accordingly. FIG. 19 shows a longitudinal section of such an embodiment, in which the passage openings 34b are completely opened over a rotation angle of 90 degrees. Within the section 3z, the sealing lip 2g extends downward, while the end face 3m is raised, and abuts against the inside of the top plate 2 and 2d. In this case, the sealing lip 2g and the end face 3m are arranged to extend in such a manner that after rotation of the rotary closure cap 2 by 90 degrees, the opening of the container mouthpiece 3a is circumferential and thus completely sealed. The rotary closure system 1 shown in FIG. 19 has two opposite passage openings 34b, wherein the liquid usually exits through the passage opening 34b shown on the left, whereas air flows into the container 3 via the outlet opening 2k, the cavity 34 and the passage opening 34b shown on the right. The passage 34b shown on the right could also be dispensed with.

In a further advantageous embodiment, the course of the sealing lip 2g and the course of the end face 3m in the circumferential direction to the axis of rotation D can be adapted adapted so that the total area of the passage opening 34b increases in a predetermined ratio, for example linear or stepped, so that the total area the passage opening 34b is determined via the angle of rotation of the rotary closure 2. For example, markings may be provided on the rotary closure 2 and on the container neck 3 to mark the relative opening of the passage opening 34b, e.g. ¼, ½, ¾ and 1. Such a plastic turn-only cap may be useful, for example, for smaller children to limit the maximum total amount of fluid outflow per unit of time.

FIG. 18 shows a further embodiment of a plastic rotary closure 1, which, in contrast to the in the FIGS. 15 to 17 illustrated embodiment, a circumferential safety belt 21 which is connected via predetermined breaking points 2t with a safety ring 2x. The safety ring 2x is part of the rotary closure 2. Should the screw cap 2 raise unintentionally, for example because the pressure in the container 3 rises, and thereby the rotating guide 2b no longer attacks the rotating guide 3d, it is the task of the safety ring 2x the enclose surrounding guide 3d such that a further lifting of the rotary closure 2 is prevented. The security band 21 has, for example, on the front side facing the bottleneck ring 3j not visible, for example, sawtooth notches, wherein the end face facing surface of the bottle neck ring 3j correspondingly adapted notches, which prevents rotation of the security band 21 in the circumferential direction to the rotation axis D, so when opening the screw cap 2 break the predetermined breaking points 2t.

Claims (14)

1. Plastic twist-closure cap (2) for a container neck (3) having a container mouthpiece (3a) with an external circumferential guide (3d), comprising a basically cyindrical mantle (2a) and a head plate (2d) on the innerside of which a single-piece annular sealing lip (2g) isformed, wherein the twist-closure cap (2) comprises a discharge opening (2k) which is disposed outside of an inner area (2y) surrounded by the annular sealing lip (2g) and extends in the form of an arc of a circle circumferential to the head plate (2d), wherein the discharge opening (2k) lies close to the sealing lip (2g) and wherein a cap mouthpiece (2n) is formed onto the outer side of the twist-closure cap (2), and wherein the discharge opening (2k) opens out into the cap mouthpiece (2n), and wherein the cylindrical mantle (2a) comprises an internal circumferential guide (2b) which is adapted to cooperate with the external circumferential guide (3d) in such a way that the twist-closure cap (2) may be connected to the container mouthpiece (3e) through turning around a rotational axis (D), characterised in that the head plate (2d) is essentially disc-formed, and in that the cap mouthpiece (2n) comprises a first sidewall (2q) and a second sidewall (2r), which form a drinking channel (2p), and in that with respect to the rotational axis (D), the first sidewall (2q) lies on the outer side of the discharge opening (2k) and circumferentially to the rotational axis (D), and in that starting from the head plate (2d), the side walls (2q, 2r) stick out beyond the head plate (2d) extending in the same general direction as the rotational axis (D), and in that the first sidewall (2q) extends circumferentially over an angle of 30 to 90 degrees.
2. Twist-closure cap (2) according to claim 1, characterised in that the discharge opening (2k) is disposed in the transitional area between head plate (2d) and cylindrical mantle (2a).
3. Twist-closure cap (2) according to one of the preceding claims for a container (3) of which the mouthpiece takes the form of a standardised container mouthpiece (3a) with a guide (3d) in the form of an external screw thread (3d), a guarantee-band ring (3e) running around it and a bottleneck ring (3j) running around it, wherein the twist-closure cap's (2) internal circumferential guide (2b) takes the form of an internal screw thread.
4. Twist-closure cap (2) according to claim 3, characterised in that the cylindrical mantle (2a) comprises a sealing section (2c) on the inner side of the end section (2s) at the opposite end to the head plate (2d), which, in the line of direction of the rotational axis (D), is formed such that the sealing section (2c) lies circumferentially up against the guarantee-band ring (3e), at least when the screw-closure cap (2) is partially raised.
5. Twist-closure cap (2) according to claim 4, characterised in that in the line of direction of the rotational axis (D), the sealingsection (2c) is formed such that the sealing section (2c) lies circumferentially up against the guamntee-band ring (3e) even when the screw-closure cap (2) is tightly closed.
6. Twist-closure cap (2) according to one of claims 3 to 5, characterised in that a circumferential guarantee-band (2l) is formed on the end section (2s) after the sealing section (2c), which comprises at east one retaining tab (2m), which sticks out towards the guarantee-band ring (3e) and which extends at least partially along the ihner side of the sealing section (2e).
7. Twist-closure cap (2) according to one of claims 3 to 5, characterised in that the end section (2s) comprises a flexible section (2o), which has a thinner wall thickness than the mantle (2a) extending between the flexible section (2o) and the head plate (2d).
8. Twist-closure cap (2) according to one of claims 3 to 7, characterised in that an end stop (2u) is formed on the inner side of the mantle (2a), sticking out into the internal space, such that the end stop (2u) butts up against the extern al screw thread (3d) after a certain rotational movement of the twist-dosure cap (2).
9. Twist-closure cap (2) according to one of claims 1 to 2, characterised in that the container mouthpiece (3a) comprises an outlet opening (3g) with a circular internal cross-section, and in that the position of the end face (3m), which is circumferential with respect to the rotational axis (D), varies in the line of direction of the rotational axis (D), and wherein the position of the sealing lip (2g), which is circumferential with respect to the rotational axis (D), varies in the same way in the line of direction of the rotational axis (D), namely in such a way as to conform with the outlet opening (3g), such that there is a twist closure cap (2) shut position in which the sealing lip (2g) lies up against the inner or the outer wall of the outlet opening (3g) around its whole circumference, and in that there is atwist-closure cap (2) open position, twisted around in the direction of rotation (D) from the shut position, in which the sealing lip (2g) only continues to lie up against a part of the circumference of the inner or the outer wall of the outlet opening (3g), resulting in a flow aperture (34b) between the outlet opening (3g) and the sealing lip (2g), such that a passageway is created between the outlet opening (3g) and the discharge opening (2k).
10. Twist-closure cap (2) according to claim 9, comprising an end stop which cooperates with the container mouthpiece (3a) in such away that a maximal angle of twist of the twist-closure cap (2) in the direction of rotation (D) is 270 degrees.
11. Twist-closure cap (2) according to one of the preceding claims, characterised in that an outer crosssection of the cap mouth piece (2n) is lenticular.
12. Twist-closure cap (2) according to claim 11, characterised in that one of the side walls (2q) runs concentrically with respect to the rotational axis (D) and with a radius of curvature (Ri), and in that, the second side wall (2r) has a larger radius of curvature (R2) than the first side wall (2q).
13. Twist-closure cap (2) according to one of claims 1 to 10, characterised in that the cap mouthpiece (2n) is in the form of either a sector or a segment of a circle.
14. Twist-closure cap (2) according to one of the preceding claims, characterised in that the sealing lip (2g) is arranged such that it externally surrounds the container mouthpiece (3a).

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