EP4108590B1 - Bayonet closure - Google Patents

Description

The present invention relates to a closure device, wherein the closure device comprises a base element, wherein the base element has a pouring channel extending along a closure axis with an inlet opening and a pouring opening, the closure device comprising a closure cap, the closure cap having a cap lid and a circumference on the Cap lid adjoining and axially extending cap jacket, wherein the closure cap and the base element are designed and arranged relative to one another such that the closure cap closes the pouring opening in a closed state of the closure device and releases it in an open state of the closure device.

Such closure devices usually have an internal thread and a corresponding external thread.

From the US 7,458,486 B2 is a self-opening closure consisting of a spout, which can be mounted sealingly on a composite pack or on a container or bottle spout to be closed with foil material or already closed, an associated rotary cap and a self-opening sleeve arranged within the spout, which can be set in rotation by the rotating cap.

From the EP 3 805 126 A1 a closure arrangement according to the preamble of claim 1 for a container filled or fillable with a free-flowing product is known.

In order to protect the environment from littering with plastic parts, there are efforts to design closures and containers in such a way that the closure cap remains connected to the container after opening. However, it has been shown that the production of such a closure, which also has an internal and external thread, usually requires a larger amount of raw materials than comparable closures in which the closure cap can be removed from the container.

Against this background, it is an object of the present invention to provide a closure device which protects the environment from littering and at the same time does not involve increased material expenditure.

This object is achieved by a closure device according to claim 1, wherein the closure device comprises a base element, the base element having a pouring channel extending along a closure axis with an inlet opening and a pouring opening, the closure device comprising a closure cap, the closure cap having a cap lid and a has a cap jacket which adjoins the cap cover on the circumference and extends axially, the closure cap and the base element being designed and arranged relative to one another in such a way that the closure cap closes the pouring opening in a closed state of the closure device and releases it in an open state of the closure device. The closure device has an anchor ring and a connecting element, wherein the connecting element connects the anchor ring to the closure cap, wherein the anchor ring is in engagement with the base element both in the closed state and in the open state of the closure device in such a way that the closure cap also in the open state is connected to the base element with the connecting element and the anchor ring.

An advantage of a bayonet-like locking device or bayonet lock compared to a lock with an internal thread and a corresponding external thread is that the bayonet lock can be made axially shorter than the threaded lock, since, unlike a thread, the required axial height is not influenced by an absolutely necessary thread pitch. In addition, bayonet fasteners can be designed in such a way that less material has to be used for their production than when producing a fastener with an external and internal thread, since - unlike a thread - one of the two interlocking guide means of a bayonet fastener is made considerably shorter when viewed in the circumferential direction can be used as the opposite means of leadership.

For the purposes of the present invention, a closure that is suitable for bayonet-like opening is to be understood as a closure that does not have an internal thread and a corresponding external thread, but rather has a first guide means arranged on the base element, such as a guide rib, a guide channel Guide tooth or a guide recess and one on the cap jacket arranged second guide means, the first and second guide means differing significantly in their circumferential extent. Due to this difference in the circumferential extent, discontinuous movement paths of the guide means during an opening movement are also possible in a mathematical sense, such as the combination of a rotational movement running exclusively in the circumferential direction with a subsequent axial movement to lift off the closure cap. In contrast, the internal and external threads of a thread only allow a constant relative movement to one another in a mathematical sense, which must have a constant axial stroke over the entire course of the thread.

In other words, for the purposes of the present invention, a closure that is suitable for bayonet-like opening is to be understood as a closure that has such guide means that these guide means generally enable both closures with continuous in the mathematical sense and closures with in the mathematical sense discontinuous movement paths of the guide means can be realized during an opening movement.

In one embodiment of the present invention, the closure cap has a first guide means, wherein the base element has a second guide means, the first and the second guide means being designed and arranged such that at least the first or the second guide means during an opening rotational movement and before lifting the closure cap follows a trajectory in the mathematical sense of the base element.

In one embodiment of the present invention, a guide means arranged on the closure cap is designed to be considerably shorter in the circumferential direction than a further guide means arranged on the base element or a guide means arranged on the base element is designed to be significantly shorter in the circumferential direction than a further guide means arranged on the closure cap, the guide means and the further guide means can be brought into and out of engagement with one another in order to selectively close or open the closure device.

According to the invention, the base element according to a first alternative of the present invention has at least one guide rib extending over a first circumferential angle W1, the guide rib viewed from the inlet opening at least in a slope section extending over a second circumferential angle W2 with a pitch section that is perpendicular to the closure axis Plane to be measured pitch angle y greater than zero increases in the axial direction, the cap jacket of the closure cap having at least one guide recess, with two axially spaced teeth each projecting radially towards the closure ash defining the guide recess.

According to the invention, the cap jacket of the closure cap according to a second alternative of the present invention has at least one guide rib extending over a first circumferential angle W1, the guide rib viewed from the cap jacket edge adjacent to the anchor ring at least in a slope section extending over a second circumferential angle W2 with a relative to a plane perpendicular to the closure axis, the pitch angle y greater than zero increases in the axial direction, the base element having at least one guide recess, with two axially spaced teeth each projecting radially away from the closure ash defining the guide recess.

In the first and second alternatives, the closure device is further designed according to the invention in such a way that the at least one guide rib and the at least one guide recess can either be brought into engagement with one another by a closing rotary movement or disengaged by an opening rotary movement in order to selectively bring the closure device into the closed state or in to bring the open state, the closure device being designed such that the engagement of the guide rib and guide recess within the slope section causes an axial relative movement between the cap jacket and the anchor ring during an opening rotational movement or a closing rotational movement.

The two alternatives have the advantage that the rotational movement causes the closure cap to advance axially relative to the anchor ring. Thus, such bayonet locks can also be used when such an axial feed is required to activate a tamper-evident device, such as tearing a tearable web. In the known bayonet locks, tearable webs between the closure cap and the anchor ring can, for example, only be torn by an axial tensile force from the user when the guide means of the bayonet lock have been disengaged. Particularly in the case of aseptic closures that have a cutting device for creating a container opening, it is desirable for such webs to tear before the closure cap can be lifted off.

For the purposes of the present invention, a guide channel is to be understood as a channel or channel section in which the corresponding guide tooth that can be used to guide the opening and closing movement can be guided when normal everyday human forces are used and which passes through itself along its entire circumferential extent in the axial direction essentially opposite wall sections is limited. A channel adjoining such a guide channel in the circumferential direction, which is not suitable for further guidance of the guide tooth or is only limited axially on one side, is not part of the guide channel.

A base element is to be understood as meaning any element designed as a counterpart to the closure cap. A base element can be, for example, a bottle neck of a beverage bottle or a pouring spout for a cardboard packaging.

If a feature of the present invention can relate to both the guide rib and the guide recess, the term “guide means” which encompasses all of these elements is used.

If an embodiment of the present invention is discussed below without one or more of the two alternatives mentioned being explicitly mentioned in this context, this embodiment can be implemented in each of the mentioned embodiments.

In one embodiment of the present invention, the guide rib is not helically shaped.

In one embodiment of the present invention, the guide recess has an axial pitch corresponding to the axial pitch of the guide tooth with the pitch angle δ = y.

Such a design of the guide recess enables an easy-to-fix engagement of the guide recess and guide rib in the closed state of the closure device.

In one embodiment of the present invention, the guide recess has a pitch δ ≠ γ that deviates from the axial pitch of the guide tooth or no axial pitch δ = 0.

Such a design of the guide recess makes it possible to produce closure devices with very small axial heights.

In one embodiment of the present invention, the guide rib has a non-rising rib section without an axial pitch and a guide recess with a pitch δ greater than zero. This dimensioning allows the base element and the closure cap to be manufactured with a small axial height and with little material expenditure, despite the anchor ring.

For the purposes of the present invention, the extension direction of a guide channel, a guide rib, a guide tooth or a guide recess is to be understood as meaning that spatial direction in which the respective guide means essentially extends, so that the closure cap is guided along this extension direction in the course of an opening or closing movement is made possible.

In one embodiment of the present invention, the guide rib and the guide recess are designed such that when the guide recess surrounds the slope section or a partial region of the slope section, axial lifting of the closure cap is prevented without a further rotational movement of the closure cap about the closure axis.

In this embodiment, the slope section not only serves to guide the closure cap axially, but also as a closing mechanism.

In one embodiment of the present invention, the guide recess has a nearest first stop surface viewed from the pouring opening in the closed state of the closure device and a further second stop surface viewed from the pouring opening in the closed state of the closure device, the guide rib being in the closed state of the closure device at least one relative circumferential position of the guide rib and guide recess is in contact with the first stop surface via a first contact point and is in contact with the second stop surface via a second contact point.

In one embodiment of the present invention, in the closed state of the closure device, the guide rib is in contact with the first stop surface via a first contact point and in contact with the second stop surface via a second contact point at essentially every relative circumferential position of the guide rib and the guide recess.

In one embodiment of the present invention, the guide recess has a nearest first stop surface viewed from the pouring opening in the closed state of the closure device and a further second stop surface viewed from the pouring opening in the closed state of the closure device, wherein the guide rib in the closed state of the closure device at least one relative circumferential position of the guide rib and guide recess is in contact with the first stop surface via a first contact point and by exclusively axially moving the closure cap by a distance s greater than zero out of contact with the first stop surface and in contact with the second stop surface via a second contact point can be brought.

In one embodiment of the present invention, the distance s is greater than zero at each relative circumferential position of the guide rib and guide recess.

The distance s represents the axial play that exists between the guide means of the closure cap and the guide means of the base element. A small amount of play is advantageous because this allows the user to open and close the locking device more easily.

In one embodiment of the present invention, the distance s is a maximum of 0.8 mm.

In one embodiment of the present invention, the distance s is a maximum of 0.5 mm.

In one embodiment of the present invention, the distance s is a maximum of 0.3 mm.

These maximum values have proven to be particularly advantageous in numerous tests because, on the one hand, they enable a sealing closure device and, on the other hand, they allow sufficient play to achieve a smooth opening and closing movement.

In one embodiment of the present invention, the guide recess or, in the case of several guide recesses, all guide recesses taken together extend over a circumferential angle of a maximum of 45 degrees.

In one embodiment of the present invention, the guide recess or, in the case of several guide recesses, all guide recesses taken together extend over a circumferential angle of a maximum of 30 degrees.

In one embodiment of the present invention, the guide recess or, in the case of several guide recesses, all guide recesses taken together extend over a circumferential angle of a maximum of 15 degrees.

It has been shown that the value ranges defined by the maximum values mentioned represent an advantageous compromise between the strength of the engagement of the guide means and the flexibility with regard to the formation of the movement path of the guide means during an opening or closing movement.

In one embodiment of the present invention, the guide recess or, in the case of several guide recesses, all guide recesses taken together extend over a circumferential angle of at least 3 degrees.

In one embodiment of the present invention, the guide recess or the entirety of the guide recesses extends over a circumferential angle of 5 to 10 degrees.

This area for the circumferential extension has proven to be particularly advantageous, since this allows movement paths of the guide means to be realized, which enable the closure cap to be designed with an extremely short axial height.

In one embodiment of the present invention, the guide rib in the slope section has a rib width d' to be measured perpendicular to the direction of extension of the guide tooth, the part of the guide recess delimiting the guide rib in the axial direction in the closed state of the closure device having an in Has a maximum circumferential extent a' to be measured in the circumferential direction and a minimum extent axial extent b' to be measured axially, the circumferential extent a' and the axial extent b' being designed such that the following inequality is satisfied: $$b\prime -a\prime \tan \gamma \ge d\prime \cos \gamma \mathrm{.}$$

Guide means designed in this way have proven to be particularly advantageous with regard to the sliding friction properties within the slope section.

In one embodiment of the present invention, the circumferential extent a' and the axial extent b' are designed such that the following equation is essentially satisfied: $$b\prime -a\prime \tan \gamma \ge d\prime \cos \gamma \mathrm{.}$$

In one embodiment of the present invention, the closure device has a single guide recess.

These embodiments are accompanied by a particularly simple and cost-effective manufacturing process.

In one embodiment of the present invention, the guide rib and the guide recess are designed and arranged such that, when the closure device is closed, they overlap over a distance of at least 0.6 mm to be measured radially to the closure axis.

In one embodiment of the present invention, the guide rib and the guide recess are designed and arranged such that, when the closure device is closed, they overlap over a distance of at least 0.75 mm to be measured radially to the closure axis.

In one embodiment of the present invention, the guide rib and the guide recess are designed and arranged such that, when the closure device is closed, they overlap over a distance of at least 0.8 mm to be measured radially to the closure axis.

In one embodiment of the present invention, a rib width d' to be measured perpendicular to the direction of extension of the guide rib is constant over the entire circumferential extent of the guide rib.

In one embodiment of the present invention, a rib width d' to be measured perpendicular to the direction of extension of the guide rib varies along the circumferential extent of the guide rib. Among other things, this makes it possible to design the guide recess with a pitch greater than zero and at the same time to form guide rib sections without a pitch or with a small pitch, the rib width of which must be smaller than the width of the recess perpendicular to the direction of extension.

In one embodiment of the present invention, a rib width d' to be measured perpendicular to the direction of extension of the guide rib increases in the closed state of the closure device in the direction of the inlet opening. This enables the guide rib to jam in the guide recess in the closed state of the closure device.

In one embodiment of the present invention, the first circumferential angle W1 is less than 400 degrees.

In one embodiment of the present invention, the first circumferential angle W1 is less than 380 degrees.

In one embodiment of the present invention, the first circumferential angle W1 is less than 360 degrees.

In one embodiment of the present invention, the first circumferential angle W1 is less than or equal to 355 degrees.

In one embodiment of the present invention, the first circumferential angle W1 is less than or equal to 270 degrees.

In one embodiment of the present invention, the first circumferential angle W1 is less than or equal to 180 degrees.

In one embodiment of the present invention, the first circumferential angle W1 is greater than or equal to 100 degrees.

In one embodiment of the present invention, the first circumferential angle W1 is greater than or equal to 180 degrees.

In one embodiment of the present invention, the first circumferential angle W1 is greater than or equal to 300 degrees.

In one embodiment of the present invention, the second circumferential angle W2 is at least 10 degrees.

In one embodiment of the present invention, the second circumferential angle W2 is at least 30 degrees.

In one embodiment of the present invention, the second circumferential angle W2 is at least 180 degrees.

In one embodiment of the present invention, the second circumferential angle W2 is between 10 and 40 degrees.

In one embodiment of the present invention, the second circumferential angle is between 180 and 360 degrees.

In one embodiment of the present invention, the helix angle y is between 1 and 10 degrees.

In one embodiment of the present invention, the helix angle y is between 20 and 60 degrees.

In one embodiment of the present invention, the helix angle y is between 30 and 45 degrees.

In one embodiment of the present invention, the pitch angle varies within the pitch section in a value range of 1 degree and 45 degrees.

In one embodiment of the present invention, the pitch angle varies within the pitch section in a value range of 1 degree and 30 degrees.

In one embodiment of the present invention, the pitch angle varies within the pitch section in a value range of 1 degree and 20 degrees.

In one embodiment of the present invention, the slope section extends such that the first circumferential angle W1 is equal to the second circumferential angle W2.

In one embodiment of the present invention, the at least one slope section or several slope sections are designed such that the guide rib is at least the sum of a rib width to be measured perpendicular to the direction of extension of the guide recess and a tooth width of the teeth forming the guide recess to be measured perpendicular to the direction of extension of the guide recess , if the teeth have the same tooth width, or of the tooth whose tooth width is larger, if the teeth have different tooth widths, increases axially.

In one embodiment of the present invention, the at least one slope section or a plurality of slope sections is designed such that the guide rib essentially increases axially overall by the amount of a rib width to be measured perpendicular to the direction of extension of the guide tooth.

In one embodiment of the present invention, the guide rib rises axially overall by at least 0.5 mm and at most 2.5 mm in all existing pitch sections.

In one embodiment of the present invention, the guide rib overall rises axially by at least 0.8 mm and at most 2.0 mm in all existing pitch sections.

In one embodiment of the present invention, the guide rib rises axially by 1.8 mm to 2.2 mm over a circumferential angle of substantially 360 degrees.

In one embodiment of the present invention, the pitch angle is constant within the pitch section.

In one embodiment of the present invention, the pitch angle varies within the pitch section.

In one embodiment of the present invention, the gradient section comprises a lead section with a constant gradient angle y1 and an opening section which closes thereto in the opening rotation direction and has a constant gradient angle y2 unequal to y1, the gradient angle y2 being greater than the gradient angle y1.

In one embodiment of the present invention, the gradient section comprises a lead section with a constant gradient angle y1 and an opening section which closes thereto in the opening rotation direction and has a constant gradient angle y2 unequal to y1, the gradient angle y1 being greater than the gradient angle y2.

In one embodiment of the present invention, at least two pitch sections are provided, which are separated from one another by a guide rib section with a pitch angle equal to zero.

In one embodiment of the present invention, the guide rib has a first pitch section at its circumferential end closest to the inlet opening and preferably a second pitch section at the circumferential end closest to the outlet opening.

In one embodiment of the present invention, the guide rib and the guide recess are designed and arranged relative to one another in such a way that when the closure cap is opened for the first time by a rotational movement of 40 degrees or less, at least at a circumferential position of the closure cap, there is an axial lifting movement of the closure cap relative to the anchor ring of at least 0.5 mm , preferably at least 0.75 mm and particularly preferably at least 1 mm.

In one embodiment of the present invention, a tearable web is arranged between the anchor ring and the closure cap or between the anchor ring and a guarantee ring at the at least one rotation angle position.

In one embodiment of the first alternative of the present invention, the base element has a stop element, the stop element being designed and arranged in such a way that it only comes into contact with a tooth forming the guide recess of the first alternative when the closure cap is in relation to the anchor ring can be axially lifted or pivoted in this way, without the need for a further rotational movement of the closure cap about the closure axis to release the pouring opening.

In one embodiment of the second alternative of the present invention, the cap jacket has a stop element, the stop element being designed and arranged in such a way that it only comes into contact with a tooth forming the guide recess of the second alternative when the closure cap is in relation to the anchor ring can be axially lifted or pivoted without the need for a further rotational movement of the closure cap around the closure cap to release the pouring opening.

In one embodiment of the present invention, the closure device comprises, in addition to the anchor ring, a guarantee ring, wherein the guarantee ring is connected to the anchor ring via easily tearable webs, wherein the closure device is designed such that the easily tearable webs tear when the closure device is opened for the first time, so that the guarantee ring completely separates from the anchor ring.

In one embodiment of the present invention, the closure device comprises a cutting device arranged at least in sections within the pouring channel with a cutting element, the closure cap comprising a driver device, the driver device and the cutting device being designed and arranged in such a way that the closure cap is rotated for the first time in an opening direction of rotation Movement of the cutting element from a starting position of the cutting element in a direction pointing from the pouring opening to the inlet opening, so that the cutting element can be moved at least in sections through the inlet opening.

In one embodiment of the present invention, the closure device has a tamper-evident device, wherein the tamper-evident device provides a first visible or tactile display in a first state and, in a second state, provides a second visible or tactile display that can be distinguished from the first display, wherein the closure device is designed such that when it is used for the first time Opening rotational movement, the tamper-evident device changes from the first state to the second state at a rotation angle D1, the rotation angle D1 being measured starting from a rotation angle zero point D0.

In one embodiment of the present invention, after the tamper-evident device has changed from the first state to the second state at a rotation angle D2, the cutting element moves out of the pouring channel through the inlet opening for the first time, so that the rotation angle D2 is greater than the rotation angle D1, both rotation angles D1 and D2 are measured starting from the same rotation angle zero point D0.

In one embodiment of the present invention, the rotation angle D2 is at least 10 degrees larger than the rotation angle D1.

In one embodiment of the present invention, the rotation angle D2 is at least 20 degrees larger than the rotation angle D1.

In one embodiment of the present invention, the rotation angle D2 is greater than the rotation angle D1 by a maximum of 60 degrees.

In one embodiment of the present invention, the tamper-evident device comprises an additional guarantee ring connected to the anchor ring via at least one easily tearable web, wherein the at least one easily tearable web between the anchor ring and the guarantee ring is intact in the first state of the tamper-evident device and torn in the second state of the tamper-evident device is.

In one embodiment of the present invention, the tamper-evident device comprises at least one easily tearable web between the anchor ring and the cap jacket of the closure cap, wherein the at least one easily tearable web between the anchor ring and the cap jacket is intact in the first state of the tamper-evident device and torn in the second state of the tamper-evident device is.

In one embodiment of the present invention, the at least one slope section is designed in such a way and is arranged at least in sections in a rotation angle range between D0 and D1, so that during an initial opening rotation movement when the rotation angle D1 is reached by the axial guidance of the Closure cap along the slope section which tears at least one tearable web between the anchor ring and the cap jacket.

In one embodiment of the present invention, the closure device is designed such that during an opening rotation movement, first the at least one tearable web between the anchor ring and the guarantee ring and then a tearable web between the anchor ring and the closure cap tears.

In one embodiment of the present invention, the closure cap has an annular sealing ring which projects into the pouring opening when the closure device is closed and which rests against an inner surface of the pouring channel, the sealing ring having a circumferential sealing projection which projects radially from the closure axis, wherein in the closed state State of the closure device, the relative axial position of the sealing projection relative to the pouring channel at a first circumferential position differs from the relative axial position of the sealing projection relative to the pouring channel at a second circumferential position.

In one embodiment of the present invention, the sealing projection is arranged further away from the cap cover at a circumferential position of the guide recess than at a circumferential position of the connecting element.

In one embodiment of the present invention, the axial extent of the sealing ring varies in the circumferential direction. This enables a particularly simple realization of a sealing projection with a varying axial position.

In one embodiment of the present invention, the sealing projection is arranged on the axial end of the sealing ring facing away from the cap cover.

In one embodiment of the present invention, the closure cap has a first guide means such as a guide channel, a guide rib, a guide tooth or a guide recess, wherein the base element has a second guide means, wherein the first guide means and the second guide means can be brought into and out of engagement with one another are to selectively close or open the closure device, the first and second guide means being designed in such a way that a rotational movement of the closure cap in the circumferential direction relative to the base element is mandatory in order to disengage the guide means is necessary and a rotational movement of the closure cap relative to the base element is not necessary to bring the guide means into engagement.

In one embodiment of the present invention, the closure device has a re-closing device, wherein the re-closing device is designed and arranged in such a way that in order to disengage the guide recess and guide rib from the closed state, a rotational movement of the closure cap in the circumferential direction relative to the base element is mandatory is necessary and at least for a part of the possible relative positions of the closure cap and base element to one another for bringing the guide recess and guide rib into engagement, an axial relative movement of the base element and closure cap without movement components in the circumferential direction is sufficient.

In one embodiment of the first alternative of the present invention, the reclosing device comprises the tooth which defines the guide recess and is closest to the entrance opening in the closed state of the closure device, wherein the tooth has a radially rising insertion slope viewed from the entrance opening, the insertion slope being designed such that starting from From the open state of the closure device, the tooth can be moved via the insertion slope in the direction of the entrance opening in order to come into engagement with the guide rib.

In one embodiment of the second alternative of the present invention, the reclosing device comprises the tooth defining the guide recess and closest to the pouring opening in the closed state of the closure device, this tooth having a radially rising insertion bevel viewed from the pouring opening, the insertion bevel being designed such that the Guide rib can be moved over the insertion slope in the direction of the entrance opening in order to bring about engagement of the guide rib and the guide recess.

This makes it possible to design the closure device in such a way that it can be closed at any relative position of the closure cap and base element by simply pressing down the closure cap axially. A rotational movement is therefore not absolutely necessary to close the closure device in this embodiment.

In one embodiment of the present invention, a latching element is arranged in or directly on the slope section, the latching element being in the first and second alternative, during an opening rotary movement or during a closing rotary movement, it came into engagement with the guide tooth and thereby made the further opening rotary movement more difficult, but not prevented.

In one embodiment of the present invention, the closure cap is connected to the anchor ring exclusively via the connecting element before the closure device is opened for the first time.

In one embodiment of the present invention, the connecting element is a hinge element, so that the closure cap can be pivoted relative to the anchor ring after the closure device has been opened for the first time about a pivot axis aligned essentially perpendicular to the closure axis.

Fig. 1:

eine Verschlussvorrichtung im verschlossenen Zustand in einer perspektivischen Ansicht,

Fig. 2:

die Verschlussvorrichtung aus Fig. 1 in einem halbgeöffneten Zustand in einer Seitenansicht,

Fig. 3:

die Verschlussvorrichtung aus Fig. 1 im geöffneten Zustand in einer perspektivischen Ansicht,

Fig. 4:

eine Schnittansicht der Verschlussvorrichtung aus Fig. 1 im verschlossenen Zustand vor einem erstmaligen Öffnen,

Fig. 5:

eine Schnittansicht der Verschlussvorrichtung aus Fig. 1 im verschlossenen Zustand nach einem erstmaligen Öffnen,

Fig. 6:

eine perspektivische Ansicht des Basiselements der Verschlussvorrichtung aus Fig. 1,

Fig. 7:

eine perspektivische Ansicht der Verschlusskappe der Verschlussvorrichtung aus Fig. 1,

Fig. 8:

eine angeschnittene Seitenansicht der Verschlusskappe der Verschlussvorrichtung aus Fig. 1,

Fig. 9:

eine weitere Verschlussvorrichtung im verschlossenen Zustand in einer perspektivischen Ansicht,

Fig. 10:

die Verschlussvorrichtung aus Fig. 9 in einem halbgeöffneten Zustand in einer Seitenansicht,

Fig. 11:

die Verschlussvorrichtung aus Fig. 9 im geöffneten Zustand in einer perspektivischen Ansicht,

Fig. 12:

eine Schnittansicht der Verschlussvorrichtung aus Fig. 9 im verschlossenen Zustand vor einem erstmaligen Öffnen,

Fig. 13:

eine Schnittansicht der Verschlussvorrichtung aus Fig. 9 im verschlossenen Zustand nach einem erstmaligen Öffnen,

Fig. 14:

eine perspektivische Ansicht des Basiselements der Verschlussvorrichtung aus Fig. 9,

Fig. 15:

eine perspektivische Ansicht der Verschlusskappe der Verschlussvorrichtung aus Fig. 9,

Fig. 16:

eine angeschnittene Seitenansicht der Verschlusskappe der Verschlussvorrichtung aus Fig. 9,

Fig. 17:

eine Schnittansicht der Verschlusskappe der Verschlussvorrichtung aus Fig. 9.

Further features and advantages of the present invention are described with reference to the following figures. All features of the invention are not shown in the figures. Features that are not part of the invention are also presented. The aim of these figures is to facilitate understanding of the invention. Show it:

Fig. 1:

a closure device in the closed state in a perspective view,

Fig. 2:

the locking device Fig. 1 in a half-opened state in a side view,

Fig. 3:

the locking device Fig. 1 when open in a perspective view,

Fig. 4:

a sectional view of the closure device Fig. 1 in the closed state before opening for the first time,

Fig. 5:

a sectional view of the closure device Fig. 1 in the closed state after opening for the first time,

Fig. 6:

a perspective view of the base element of the closure device Fig. 1 ,

Fig. 7:

a perspective view of the closure cap of the closure device Fig. 1 ,

Fig. 8:

a sectioned side view of the closure cap of the closure device Fig. 1 ,

Fig. 9:

another closure device in the closed state in a perspective view,

Fig. 10:

the locking device Fig. 9 in a half-opened state in a side view,

Fig. 11:

the locking device Fig. 9 when open in a perspective view,

Fig. 12:

a sectional view of the closure device Fig. 9 in the closed state before opening for the first time,

Fig. 13:

a sectional view of the closure device Fig. 9 in the closed state after opening for the first time,

Fig. 14:

a perspective view of the base element of the closure device Fig. 9 ,

Fig. 15:

a perspective view of the closure cap of the closure device Fig. 9 ,

Fig. 16:

a sectioned side view of the closure cap of the closure device Fig. 9 ,

Fig. 17:

a sectional view of the closure cap of the closure device Fig. 9 .

A first closure device 1 of the present disclosure includes as in Fig. 1 shown a closure cap 6 with a cap lid 7 and a cap jacket 8. The closure cap 6 is connected to an anchor ring 9 via a hinge element 10. The anchor ring 9 is connected to a guarantee ring 24 on its lower edge via easily tearable webs 23. In the closure device shown here, tearable webs 23 are also arranged between the anchor ring and the closure cap. Both the tearable webs 23 and the guarantee ring 24 are part of a tamper-evident device 22. In an alternative embodiment, no tearable webs 23 are arranged between the anchor ring and the closure cap (not shown).

In Fig. 1 the closure device 1 shown is shown in a closed state before being opened for the first time. The tearable webs 23 are therefore still intact. This embodiment is also an aseptic closure device 1 with a cutting device 25 having a plurality of cutting elements 26. The cutting elements 26 are arranged on a cutting ring and in practice pierce a cardboard packaging arranged below the closure device when the closure device 1 is opened for the first time. In the initially closed state shown, the cutting elements 16 have not yet been moved out of the entrance opening 4.

The closure cap 6 is as in Fig. 1 shown placed on a base element 2 in the closed state of the closure device. The base element 2 has a fastening flange 35, via which it is cohesively bonded to a cardboard packaging can be connected. This connection can be realized, for example, by ultrasonic welding.

Will the in Fig.1 If the closure device 1 shown is initially opened by a rotary movement, the guarantee ring 24 comes into engagement with locking projections 33 located on the base element 2 and is thus prevented from further rotational movement together with the anchor ring 9 and the closure cap 6, so that the shear forces resulting from this engagement between the guarantee ring 24 and anchor ring 9 tear the tearable webs 23 after a first rotation of the closure cap 6 by ten degrees at the latest.

After turning for the first time through an angle of rotation of approximately 280 degrees, the cutting elements 26 are in the Fig. 1 to 8 The closure device shown is moved out of the input opening 4 to the maximum and the closure cap 6 has been automatically raised by the special design of the guide means of this embodiment. The resulting state is in Fig. 2 shown.

As soon as the closure device 1 is in the in Fig. 2 In the state shown, a user can pivot the closure flap 6 in the axial direction and thereby release the pouring opening 5, so that a filling product of a container equipped with the closure device 1 can be removed from the container via the pouring channel 3.

In. Fig. 3 The guide means of the locking device shown here can be clearly seen. It is a closure device in which the base element 2 has a guide channel 11 and the closure cap 6 has a guide tooth 13. In this case, the guide channel 11 has a gradient section 12 which extends over the entire guide channel 13, so that the first circumferential angle W1 is equal to the second circumferential angle W2 and has a constant gradient angle. In other words, this is a uniformly rising guide channel.

The sectional views of the Fig. 4 and the Fig. 5 show the interior of the locking device 1 in the unopened state ( Fig. 4 ) and after opening the locking device 1 for the first time ( Fig. 5 ). During the first opening rotation movement, the two driver webs 27 present each come into engagement with a guide cam of the cutting device 25. The cutting device 25 has a cutting ring with four blade-like cutting elements 26. Due to the engagement of the driver web 27 and the guide cam, the cutting ring is converted into a combined translational and Rotary movement offset so that it rotates out of the entrance opening 4. If the closure device 1 is placed on a cardboard packaging, this movement of the cutting ring pierces or cuts the cardboard packaging or a seal of the cardboard packaging that is specially designed for this purpose in the area of the entrance opening, so that an opening to the cardboard packaging contents is created.

The pouring opening can be as in the Fig. 4 and 5 shown can be closed by the closure cap 6. In the closed state, a sealing ring 28 arranged on the cap lid 7 nestles against the inner surface of the pouring channel 3 in order to close the pouring opening 5 in a liquid-tight manner. The sealing ring 28 can be formed with a radially projecting sealing projection 29, the relative axial position of the sealing projection 29 to the cap cover 7 varying along the circumferential direction in order to produce an advantageous seal. The sealing ring 28 of the first closure device corresponds to the sealing ring 28 of the second closure device. The latter is in detail Fig. 17 shown. There it can be seen that the axial extent of the sealing ring 28 in the area of the connecting element 10 designed as a hinge is essentially half as large as the axial extent of the sealing ring 28 in the area of the guide tooth. The sealing projection 29 is arranged circumferentially at the end of the sealing ring closest to the inlet opening in the closed state, ie over a complete circumferential angle of 360 degrees, so that the axial position of the sealing projection also varies according to the axial extent of the sealing ring.

In Fig. 6 the base element 2 of the first closure device is shown alone. Here, in particular, the locking projections 33 can be seen, which come into engagement with the guarantee ring 24 during an initial opening rotation movement, so that after the first ten degrees of rotation of the elements that had been rotating together until then, the closure cap 6, anchor ring 9 and guarantee ring 24, the webs 23 between the anchor ring and tear the guarantee ring. It can also be clearly seen in this illustration that the guide channel 11 is formed by a rib projecting radially outwards, which runs on the circumference with a constant pitch and converges at its end closest to the inlet opening 4 with a retaining ring 34 which runs perpendicular to the closure axis.

The holder ring 34 serves to hold the anchor ring 9 on the base element 2, so that an axial movement of the anchor ring 9 in the direction of the pouring opening is limited.

By definition, the guide channel 11 only extends as far as the guide tooth 13 of the closure cap 6 can be guided within the channel formed by the rib. The channel narrowed by the rib and the retaining ring 34 in the lower end section is therefore not part of the guide channel 11 to the extent that the guide tooth 13 of the closure cap 6 can no longer be guided in this channel with everyday use of force.

The training of the guide tooth 13 is in Fig. 7 and Fig. 8 shown. In the embodiment shown here, the guide tooth 13 and the guide channel 11 have the same pitch, so that it is particularly easy for the user to move the guide tooth 13 within the guide channel 11.

At the in the Fig. 1 to 8 In the locking device shown, the anchor ring 9 has flat holding tabs which can be folded down in the axial direction and which can be brought into engagement with the retaining ring 34 of the base element 2 in the folded position in order to hold the anchor ring 9 on the base element 2. Alternatively, you can also - as with the one in the Fig. 9 to 16 second closure device shown - projections aligned radially to the closure axis may be provided.

In the Fig. 9 to 16 a second closure device of the invention is shown. In the following, only the differences to the first closure device will be discussed. Unless otherwise described, the second closure device is designed in accordance with the first closure device.

In contrast to the first closure device, the second closure device - as in Fig. 9 recognizable - no additional guarantee ring 24. In the second closure device, tamper-evident protection is implemented by tearable webs 23, which are arranged between the anchor ring 9 and the closure cap 6.

The omission of the guarantee ring 23 is caused by the in Fig. 11 and 14 recognizable, discontinuously increasing formation of the guide channel 11 is possible. In the second embodiment, the webs 23 of the tamper-evident device 22 tear within the first 30 to 40 degrees of rotation angle without the need to exploit shear forces between the closure cap 6 and the anchor ring 9 through engagement of locking projections. At a rotation angle of approximately 30 to 40 degrees, the cutting ring 26 has not yet moved out of the entrance opening, so that the tamper-evident device guarantees that not With the torn webs 23, no contamination of the contents of the packaging has occurred due to an unintentional or intentional cutting of the cardboard packaging.

The guide channel 11 has two slope sections 12. The first slope section 12 viewed from the entrance opening 4 causes the guide tooth 13 and thus also the closure cap 6 to move axially upwards within the first 40 degrees of rotation angle in such a way that the resulting axial forces are sufficient to move the tearable webs 23 between Tear closure cap 6 and anchor ring 9. In a channel section 20 without a gradient adjoining this gradient section in the direction of opening rotation, the guide tooth 13 is guided exclusively in the circumferential direction. Due to the resulting rotational movement of the closure cap 6, the cutting ring is moved through the inlet opening 4, so that it is completely extended when the guide tooth 13 of the end of the guide channel 11 closest to the pouring opening 5 is reached at the latest. The channel section 20 without a slope is followed by a further slope section 12 in the opening rotation direction, which causes the closure cap 6 to continue to lift axially and then - after the guide tooth 13 and guide channel 11 have disengaged - is given away slightly in the axial direction can be used to release the pouring opening 5.

As per the Fig. 11 , 14 and 16 can be seen, the guide tooth 13 of the second embodiment has the same slope as the two slope sections 12 of the guide channel 11. For this reason, the guide channel section 20 is designed to be widened without a slope, so that the guide tooth, which is inclined in relation to this guide channel section 20, can be guided through the guide channel section 20 which is formed perpendicular to the closure axis.

The second closure device has a reclosure mechanism, which is realized by the insertion bevel 32. The wall section 17 defining the upper boundary of the guide channel is at least partially equipped with an axially extending and radially rising insertion bevel 32. This insertion bevel 32 makes it possible to press the guide tooth 13 into the guide channel 11 via the upper wall cut 17 with a variety of relative positions of the guide tooth 13 and the guide channel 11 (equivalent to the closure cap 6 and base element 2) - using the usual everyday forces of an average user . The ones in the Fig. 9 to 16 Closure device 1 shown can therefore only be opened like a twist lock, but reclosed like a flip top closure.

Fig. 14 also shows a stop element 30. If a user turns the closure cap 6 from the closed state in the opening direction of rotation, the guide tooth 13 then comes into contact with the stop element 30 when the guide tooth 13 and the guide channel 11 are out of contact and thus an axial pivoting of the closure cap 6 is possible.

While the invention has been described in detail in the foregoing description, this description is given by way of example only and is not intended to limit the scope as defined by the claims. The invention is not limited to the disclosed embodiments.

Variations of the disclosed embodiments will be apparent to those skilled in the art from the drawings, description and appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the indefinite article "a" or "an" does not exclude a plurality. The mere fact that certain features are claimed in different claims does not preclude their combination. Reference numerals in the claims are not intended to limit the scope.

Reference symbol list

1

Closure device

2

Basic element

3

pouring channel

4

Entrance opening

5

Pouring opening

6

Cap

7

Cap lid

8th

Cap coat

9

anchor ring

10

connecting element

11

Guide channel

12

slope section

13

Guide tooth

17, 17'

Wall section

20

Guide channel section with gradient equal to zero

22

Originality assurance device

23

tearable bridge

24

Guarantee ring

25

cutting device

26

cutting element

27

Takeaway facility

28

sealing ring

29

Sealing projection

30

stop element

31

Locking element

32

Insertion bevel

33

locking projection

34

retaining ring

35

mounting flange

50

Locking axis

Claims (43)

1. Closure device (1) for opening a container,

   wherein the closure device (1) comprises a basic member (2),

   wherein the basic member (2) has a pouring channel (3) extending along a closure axis (50) and having an inlet opening (4) and a pouring opening (5),

   wherein the closure device (1) comprises a closure cap (6),

   the closure cap (6) having a cap cover (7) and a cap skirt (8) which adjoins the cap cover (7) at the periphery and extends axially,

   wherein the closure cap (6) and the basic member (2) are configured in such a way that the closure cap (6) closes the pouring opening (5) in a closed state of the closure device (1) and opens it in an open state of the closure device (1),

   wherein the closure device (1) comprises an anchor ring (9) and a connecting element (10),

   wherein the connecting element (10) connects the anchor ring (9) to the closure cap (6),

   wherein the anchor ring (9) is engaged with the basic member (2) both in the closed state and in the open state of the closure device (1) in such a way that the closure cap (6) is connected to the basic member (2) with the connecting element (10) and the anchor ring (9) also in the open state,

   characterised in that

   the closure device is provided for bayonet-type opening of the container,

   wherein in a first alternative

   the basic member (2) has at least one guide rib extending over a first circumferential angle W1,

   wherein the guide rib, viewed from the inlet opening (4), rises in the axial direction at least in a pitch section (12) extending over a second circumferential angle W2 with a pitch angle γ greater than zero to be measured relative to a plane perpendicular to the closure axis (50),

   wherein the cap skirt (8) of the closure cap (6) has at least one guide recess,

   wherein two axially spaced teeth each projecting radially towards the closure axis define the guide recess,

   wherein in a second alternative

   the cap skirt (8) of the closure cap (6) has at least one guide rib extending over a first circumferential angle W1,

   wherein the guide rib rises in the axial direction at least in a pitch section (12) extending over a second circumferential angle W2 with a pitch angle γ greater than zero to be measured relative to a plane perpendicular to the closure axis (50), as viewed from the cap skirt edge adjacent to the anchor ring (9),

   wherein the basic member (2) has at least one guide recess,

   wherein two axially spaced teeth each projecting radially away from the closure axis define the guide recess,

   wherein in the first and second alternative the closure device (1) is configured such that the at least one guide rib and the at least one guide recess are selectively engageable with one another by a closing movement or disengageable from one another by an opening rotary movement in order to selectively bring the closure device (1) into the closed state or into the open state,

   wherein the closure device (1) is configured in such a way that the engagement of guide rib and guide recess within the pitch section (12) causes an axial relative movement between cap skirt (8) and anchor ring (9) during an opening rotary movement.
2. Closure device (1) according to claim 1,
   wherein the guide recess has an axial pitch corresponding to the axial pitch of the guide tooth (13) with the pitch angle δ=γ.
3. Closure device (1) according to claim 1,
   wherein the guide recess has an axial pitch δ≠γ different from the axial pitch of the guide tooth (13) or no axial pitch δ=0.
4. Closure device (1) according to any one of claims 1 to 3,
   wherein the guide rib and the guide recess are configured such that, when the guide recess engages around the pitch section (12) or a partial region of the pitch section (12), axial lift-off of the closure cap (6) is prevented without further rotational movement of the closure cap (6) about the closure axis (50).
5. Closure device (1) according to any one of claims 1 to 4,

   wherein the guide recess has a nearest first abutment surface viewed from the pouring opening (5) in the closed state of the closure device (1) and a distal second abutment surface viewed from the pouring opening (5) in the closed state of the closure device (1),

   wherein, in the closed state of the closure device (1), the guide rib is in contact with the first stop surface via a first contact point in at least one circumferential position and can be brought out of contact with the first stop surface and into contact with the second stop surface via a second contact point by an exclusively axial displacement of the closure cap (6) by a distance s greater than zero.
6. Closure device (1) according to claim 5,

   wherein the distance s is at most 0.8 mm,

   preferably a maximum of 0.5 mm and

   particularly preferably a maximum of 0.3 mm.
7. Closure device (1) according to any one of claims 1 to 6,
   wherein the guide recess or, in the case of a plurality of guide recesses, all guide recesses taken together extend over a circumferential angle of at most 45 degrees, preferably at most 30 degrees and particularly preferably at most 15 degrees.
8. Closure device (1) according to any one of claims 1 to 7,
   wherein the guide recess or the entirety of guide recesses extends over a circumferential angle of 5 degrees to 10 degrees.
9. Closure device (1) according to any one of claims 1 to 8,

   wherein the guide rib in the pitch section (12) has a rib width d' to be measured perpendicular to the direction of extension of the guide tooth (13),

   wherein the part of the guide recess bounding the guide rib in the closed state of the closure device (1) in the axial direction has a maximum circumferential extent a' to be measured in the circumferential direction and a minimum axial extent b' to be measured axially,

   wherein the circumferential extension a' and the axial extension b' are configured such that the following inequality is fulfilled: $$b\prime -a\prime \tan \gamma \ge d\prime \cos \gamma \mathrm{.}$$

   
10. Closure device (1) according to any one of claims 1 to 9,
    wherein the guide rib and the guide recess are configured and arranged in such a way that, in the closed state of the closure device (1), they overlap over a distance of at least 0.7 mm, preferably at least 0.8 mm, to be measured radially with respect to the closure axis (50).
11. Closure device (1) according to any one of claims 1 to 10,
    wherein a rib width d' to be measured perpendicular to the direction of extension of the guide rib remains constant over the entire circumferential extension of the guide rib.
12. Closure device (1) according to any one of claims 1 to 10,
    wherein a rib width d' to be measured perpendicularly to the direction of extension of the guide rib varies along the circumferential extension of the guide rib, preferably increases towards the inlet opening (4) in the closed state of the closure device (1).
13. Closure device (1) according to any one of claims 1 to 12,

    wherein the first circumferential angle W1 is smaller than 400 degrees,

    preferably less than 360 degrees.
14. Closure device (1) according to any one of claims 1 to 13,

    wherein the first circumferential angle W1 is greater than or equal to 180 degrees,

    preferably greater than or equal to 300 degrees.
15. Closure device (1) according to any one of claims 1 to 14,

    wherein the second circumferential angle W2 is at least 10 degrees,

    preferably at least 30 degrees.
16. Closure device (1) according to any one of claims 1 to 15,
    wherein the second circumferential angle W2 is between 10 and 40 degrees.
17. Closure device (1) according to any one of claims 1 to 15,
    wherein the second circumferential angle W2 is between 180 and 360 degrees.
18. Closure device (1) according to any one of claims 1 to 17, wherein the at least one pitch section (12) is configured in such a way that the guide rib rises axially at least by the sum of a rib width to be measured perpendicularly to the direction of extension of the guide recess and a tooth width to be measured perpendicularly to the direction of extension of the guide recess of the teeth forming the guide recess, if the teeth have the same tooth width, or of that tooth whose tooth width is greater, if the teeth have different tooth widths.
19. Closure device (1) according to any one of claims 1 to 18, wherein the guide rib rises axially in the pitch section (12) by at least 0.5 mm and at most 2.5 mm, preferably by at least 0.8 mm and at most 1.5 mm.
20. Closure device (1) according to any one of claims 1 to 19, wherein the pitch angle is constant within the pitch section (12).
21. Closure device (1) according to any one of claims 1 to 19, wherein the pitch angle varies within the pitch section (12),
    wherein preferably the pitch section (12) comprises a leading section with a constant pitch angle γ1 and an opening section closing thereto in the opening rotational direction with a constant pitch angle γ2 not equal to γ1 and either the pitch angle γ2 is larger than the pitch angle γ1 or the pitch angle γ1 is larger than the pitch angle γ2.
22. Closure device (1) according to any one of claims 1 to 21, wherein at least two pitch sections (12) are provided which are separated from each other by a guide rib section having a pitch angle equal to zero.
23. Closure device (1) according to any one of claims 1 to 22,
    wherein the guide rib has a first pitch section (12) at its circumferential end closest to the inlet opening (4) and preferably a second pitch section (12) at the circumferential end closest to the outlet opening.
24. Closure device (1) according to any one of claims 1 to 23, wherein the guide rib and the guide recess are configured and arranged relative to one another in such a way that, during a first opening rotational movement of the closure cap (6) by 40 degrees or less, an axial stroke movement of the closure cap (6) relative to the anchor ring (9) of at least 0.5 mm, preferably at least 0.75 mm, and particularly preferably at least 1 mm, is effected at least at one rotational angular position of the closure cap (6).
25. Closure device (1) according to the preceding claim, wherein a tearable bridge (23) is arranged between anchor ring (9) and closure cap (6) or between anchor ring (9) and an additional guarantee ring (24) at the at least one angular position of rotation.
26. Closure device (1) according to any one of claims 1 to 25, wherein in the first alternative the basic member (2) comprises a stop member, the stop member being configured and arranged such that it comes into contact with a tooth forming the guide recess of the first alternative only when the closure cap (6) is axially liftable relative to the anchor ring (9) such that no further rotational movement of the closure cap (6) about the closure axis (50) is necessary to release the pouring opening (5),
    wherein in the second alternative of the present invention the cap skirt (8) comprises a stop element, the stop element being configured and arranged to come into contact with a tooth forming the guide recess of the second alternative only when the closure cap (6) is axially liftable relative to the anchor ring (9) without requiring further rotational movement of the closure cap (6) about the closure cap (6) to expose the pouring aperture (5).
27. Closure device (1) according to any one of the preceding claims, wherein the closure device (1) comprises a guarantee ring (24), wherein the guarantee ring (24) is connected to the anchor ring (9) via easily tearable bridges, wherein the closure device (1) is configured in such a way that the easily tearable bridges tear when the closure device (1) is opened for the first time, wherein preferably the basic member comprises latching projections (33) which engage with the guarantee ring (24) during an initial opening rotational movement.
28. Closure device (1) according to one of the preceding claims, wherein the closure device (1) comprises a cutting device (25) arranged at least in sections within the pouring channel (3) and having a cutting element (26), and wherein the closure cap (6) comprises an entraining device, wherein the entraining device and the cutting device (25) are configured and arranged in such a manner that a first rotation of the closure cap (6) in an opening rotation direction causes a movement of the cutting element (26) starting from an initial position of the cutting element (26) in a direction pointing from the pouring opening (5) to the inlet opening (4), so that the cutting element (26) can be moved at least in sections through the inlet opening (4).
29. Closure device (1) according to one of the preceding claims, wherein the closure device (1) comprises a tamper-evident device (22),

    wherein the tamper-evident device (22) in a first state provides a first visible or tactile indication and in a second state provides a second visible or tactile indication distinct from the first indication,

    the closure device (1) being configured in such a way that, during a first opening rotary movement, the tamper-evident device (22) changes from the first state to the second state at a rotation angle D1,

    wherein the angle of rotation D1 is measured starting from an angle of rotation zero point D0.
30. Closure device (1) according to claim 29 in so far as this is referred back to claim 28,

    wherein after the tamper-evident device (22) changes from the first state to the second state, the cutting element (26) moves out of the pouring channel (3) through the inlet opening (4) for the first time at a rotation angle D2, so that the rotation angle D2 is greater than the rotation angle D1,

    wherein both angles of rotation D1 and D2 are measured starting from the same angle of rotation zero point D0.
31. Closure device (1) according to claim 30, wherein the angle of rotation D2 is greater than the angle of rotation D1 by at least 10 degrees, preferably by at least 20 degrees.
32. Closure device (1) according to claim 29, 30 or 31, wherein the tamper-evident device (22) comprises an additional guarantee ring (24) connected to the anchor ring (9) via at least one easily tearable bridge, wherein the at least one easily tearable bridge between the anchor ring (9) and the guarantee ring (24) is intact in the first state of the tamper-evident device (22) and is torn in the second state of the tamper-evident device (22).
33. Closure device (1) according to any one of claims 29 to 32, wherein the tamper-evident device comprises at least one easily tearable bridge between the anchor ring (9) and the cap skirt (8) of the closure cap (6), wherein the at least one easily tearable bridge between the anchor ring (9) and the cap skirt (8) is intact in the first state of the tamper-evident device (22) and is torn in the second state of the tamper-evident device (22).
34. Closure device (1) according to one of claims 32 or 33, wherein the at least one pitch section (12) is configured and arranged, at least in sections, in a rotational angle range between the rotational angle D0 and the rotational angle D1 such that, during a first opening rotational movement when the rotational angle D1 is reached, the at least one tearable bridge between the anchor ring (9) and the cap skirt (8) is torn by the axial guidance of the closure cap (6) along the pitch section (12).
35. Closure device (1) according to one of the preceding claims, wherein the closure cap (6) has an annular sealing ring (28) which projects into the pouring opening (5) in the closed state of the closure device (1) and bears against an inner surface of the pouring channel (3), wherein the sealing ring (28) has a circumferential sealing projection (29) extending radially away from the closure axis (50), wherein in the closed state of the closure device (1) the relative axial position of the sealing projection (29) with respect to the pouring channel (3) at a first circumferential position differs from the relative axial position of the sealing projection (29) with respect to the pouring channel (3) at a second circumferential position.
36. Closure device (1) according to any one of the preceding claims, wherein the closure cap (6) comprises a first guiding means,

    wherein said basic member (2) comprises a second guiding means,

    said first guiding means and said second guiding means being engageable and disengageable to selectively close or open said closure device (1),

    wherein the first and second guiding means are configured such that circumferential rotational movement of the closure cap (6) relative to the base member (2) is mandatory for disengaging the first and second guiding means and rotational movement of the closure cap (6) relative to the base member (2) at at least one relative circumferential position of the closure cap (6) and the base member (2) is unnecessary for engaging the first and second guiding means.
37. Closure device (1) according to any one of the preceding claims,
    wherein the closure device (1) comprises a reclosure device, the reclosure device being configured and arranged in such a manner that a rotary movement of the closure cap (6) in the circumferential direction relative to the basic member (2) is absolutely necessary for disengaging the guide recess and guide rib from the closed state, and an axial relative movement of the basic member (2) and closure cap (6) without movement components in the circumferential direction is sufficient for engaging the guide recess and guide rib for at least some of the possible relative positions of the closure cap (6) and basic member (2) with respect to each other.
38. Closure device (1) according to claim 37,

    wherein in the first alternative the reclosing means comprises the tooth defining the guide recess and being closest to the inlet opening (4) in the closed state of the closure device (1), the tooth having a radially rising insertion slope (32) viewed from the inlet opening (4), the insertion slope (32) being configured such that starting from the open state of the closure device (1) the tooth is movable over the insertion slope (32) towards the inlet opening (4) to engage the guide rib,

    wherein, in the second alternative, the reclosing means comprises the tooth defining the guide recess and being closest to the pouring opening (5) in the closed state of the closure device (1), said tooth having a radially rising insertion slope (32) as viewed from the pouring opening (5), the insertion slope (32) being configured such that the guide rib is movable over the insertion slope (32) in the direction of the inlet opening (4) to effect engagement of the guide rib and the guide recess.
39. Closure device (1) according to any one of the preceding claims, wherein the guide recess or, in the case of a plurality of guide recesses, all guide recesses together extend over a circumferential angle of at least 3 degrees.
40. Closure device (1) according to any one of the preceding claims, wherein the guide rib and the guide recess are configured and arranged such that, in the closed state of the closure device, they overlap over a distance of at least 0.6 mm to be measured radially to the closure axis.
41. Closure device (1) according to one of the preceding claims, wherein the first circumferential angle W1 is less than or equal to 355 degrees.
42. Closure device (1) according to any one of the preceding claims, wherein the pitch angle γ is between 20 and 60 degrees, preferably between 30 and 45 degrees.
43. Closure device (1) according to any one of the preceding claims, wherein the guide rib rises axially by 1.8 mm to 2.2 mm over a circumferential angle of substantially 360 degrees.

Images