NL2019132B1 - TERMINAL UNIT - Google Patents

Abstract

The invention relates to a closing unit for closing a flow opening provided in a wall of a container, comprising: - an inner closing element adapted to be attached to the edge of the wall around the flow opening provided therein, the inner closing element being further adapted to at least connect to the inside of the wall in a fixed condition and is provided with a passage for the contents of the container; - an outer closing element adapted to be releasably coupled to the inner closing element for closing the passage provided therein; wherein both the inner closure element and the outer closure element comprise a threaded coupling for tightening the outer closure element to the lower closure element; wherein the outer closing element comprises a circumferential pressure edge which is designed to clamp the outer closing element against the outside of the wall of the holder during tightening.

Description

Patent Center

Netherlands © 2019132

BI PATENT (51) Int. CL:

B65D 8/00 (2017.01) B65D 39/08 (2017.01) (21) Application number: 2019132 © Application submitted: 28/06/2017

© Priority: 27/09/2016 NL 2017 541 © Patent holder (s): Save-Ty Can Cap B.V. to GALDER. © Application registered: 06/04/2018 © Inventor (s): Corstiaan Johannes van Gooien in MAIN BLOCK COUNTRY. © Request published: © Patent granted: 06/04/2018 © Authorized representative: ir. P.J. Hylarides et al. In The Hague. © Patent issued: 09/04/2018

(54) SEALING UNIT © The invention relates to a closing unit for closing a through-flow opening provided in a wall of a container, comprising:

- an inner sealing element arranged to be attached to the edge of the wall around the through-flow opening provided therein, the inner sealing element further being arranged to at least connect to the inner side of the wall in the attached condition and provided with a passage for the contents of the container;

- an outer closing element arranged to be releasably coupled to the inner closing element for closing the passage provided therein;

wherein both the inner sealing element and the outer sealing element comprise a threaded coupling for tightening the outer sealing element to the lower sealing element;

wherein the outer sealing element comprises a circumferential pressing edge which is designed to clamp the outer sealing element against the outside of the wall of the container when tightening.

NL BI 2019 132

This patent has been granted regardless of the enclosed result of the prior art research and written opinion. The patent deviates from the documents originally filed. All submitted documents can be viewed at the Netherlands Patent Office.

CLOSING UNIT

The invention relates to a closing unit for closing a through-flow opening provided in a wall of a container, in particular a beverage container such as a can. The invention also relates to a wall of such a container arranged for attachment of such a closing unit and to the container itself.

The container can be suitable for storing any liquid or gaseous substances or solids. For example, a container can be formed by a bottle, vial, a car radiator, an engine oil reservoir, a gas tank, or the like.

Numerous different types of containers are known for the storage of liquid substances, in particular carbonated or non-carbonated drinks, or solid substances, including spreadable or pourable particles. A commonly used type of container is a beverage can. Cans are mainly cylindrical containers of metal (in particular cans), in which one metal end bracket (press-in tab) is attached in one of the end walls of the container, which serves as a temporary closure of the drinking or pouring opening formed in the container is doing.

Such a can closure is generally known and is used in almost all beverage cans. A drawback of the known closure is that once the insertion bracket has opened the pouring or drinking opening, this opening can no longer be closed. An opened can, therefore, generally has to be emptied in its entirety and the safe storage of the contents of an already opened can is not really possible in practice. To overcome this drawback, constructions have been proposed in which the closing element is designed in such a way that it can close the drinking or pouring opening again.

However, almost all of these constructions have the drawback that the closure is not always as good and leakage may therefore occur. In addition, the closures are often only suitable for closing the container when there is no carbonated drink in the container. When a container with carbonated content is shaken, for example during the transport (e.g. distribution) of the drink, large pressure build-up can take place in the container, so that the closure tends to leak. Also in the manufacturing process and / or the filling process of such containers, for instance during a possible pasteurization step, the pressure in the container can rise high (for instance up to 5 atmospheres or higher).

A closing unit is known from patent publication WO 2015/041528 A1, in which a simple, good and easy to open and close closure between the closing unit and the container can be realized by means of a special type of threaded coupling. However, this known closing unit is still relatively expensive to manufacture in large numbers. Moreover, the known sealing units are often manufactured in-mold together with the end wall of the container (e.g. by a single mold injection molding process).

This can sometimes lead to logistical objections and / or provide a relatively thick shut-off unit. Furthermore, due to the manufacturing process, the possibilities for manufacturing the sealing units in two or more materials of different properties (e.g. soft / hard) are limited and / or the sealing units are relatively wide, so that there must be relatively much space between the edge of the through-flow opening. and the edge of the end wall of the container (which means that the beverage opening has to be made relatively small). A further drawback is that the rim around the flow-through opening is uncovered and contaminants can accumulate in places where the user tends to place his mouth. Furthermore, it is of great importance that the closure of the container can withstand high pressures in the container, for example when the container is used for storing carbonated liquids.

The object of the present invention is to provide an improved closure unit for a (wall of a) container and / or a wall of a container in which at least one of the above and / or other disadvantages of the prior art is obviated or is at least partially reduced.

It is also an object of the invention to provide a shut-off unit of simple and / or compact construction and / or to provide a shut-off unit that can withstand higher pressures, for example at least 2.1 atmospheres or higher.

According to a first aspect of the present invention, a sealing unit for closing a flow-through opening provided in a wall of a container, in particular a beverage container such as a can, the closing unit comprising:

- an inner sealing element which is arranged to be attached to the edge of the wall around the through-flow opening provided therein, wherein the inner sealing element is further arranged to at least connect in the affixed condition, emptying the inside of the wall and provided with a passage for the contents of the container;

- an outer sealing element which is arranged to be releasably coupled to the inner sealing element for closing the passage provided therein;

wherein both the inner sealing element and the outer sealing element comprise a threaded coupling for tightening the outer sealing element to the lower sealing element;

the outer sealing element comprising a circumferential pressing edge configured to clamp the outer sealing element against the outside of the wall of the container when tightening, the inner sealing element being designed to snap onto the circumferential edge of the through-flow opening of the wall of the holder.

The closing unit is designed to snap to the peripheral edge of the through-flow opening of the wall of the container. This peripheral edge can be designed as an upright circumferential edge around the through-flow opening, in which, preferably, the upright peripheral edge extends at least partly obliquely with respect to the remaining part of the wall and / or has a partly convex cross-section. Such a shape allows a proper snap-on connection, whereby the risk of the closure unit coming loose is minimal.

The closure unit may be adapted to improve the closure of the through-flow opening provided by the closure unit. This is accomplished by not only coupling the outer sealing element in an essentially liquid-tight manner to the inner sealing element and the first sealing element with the holder, but also by having said circular pressing edge pressed onto the holder. As a result of screwing, the axial distance between the cap of the outer sealing element on the one hand and the top of the container wall on the other hand decreases, as a result of which the bottom of the pressing edge is pressed against the top of the container end wall and against it is clamped. The end wall can furthermore be made somewhat flexible (for instance in the case of a can or similar container) in order to further improve the clamping and thus the closure between the sealing unit and the container wall.

The closure unit exhibits improved closure of the container due to the presence of this additional closure (i.e. the additional closure provided by the press-on edge adjacent to the closure by the cylindrical parts with threaded coupling). Furthermore, the area inside the space enclosed by the circumferential pressing edge (which also includes the edge of the drinking opening) can hereby remain better clean (for instance when transporting the container), so that the user has a smaller risk of his or her mouth becoming dirty. part of the holder.

By firmly closing the outer sealing element, the pressing edge is pressed firmly against the top of the end wall, so that the pressing edge provides an additional sealing. The circular pressing edge is preferably designed such that it projects radially with respect to the peripheral edge of the cylindrical part of the outer sealing element. By protruding radially at some distance from the circumference of this cylindrical part, the pressing edge can be pushed directly onto the material of the container wall so that the circumferential pressing edge can function as an additional closure of the through-flow opening of the container. If liquid already seeps out through the connection of the first and second sealing elements on the container wall (for example at extremely high pressure), the pressure edge can still retain this liquid. Furthermore, the press-on rim ensures that the environment of the flow-through opening (i.e. the area where the mouth of the user touches the container) is generally kept clean, which can lead to increased hygiene.

With the latter in mind, in a further embodiment in which the outer sealing member comprises a cylindrical outer threaded member and the inner sealing member comprises a cylindrical inner threaded member and wherein the outer member is tighten into the inner member to form a first closure of the container, the outer closure element comprising a cap provided with the circumferential pressing edge to form a second closure of the container. The cap can be designed in such a way that, when tightened, it clamps onto the top of the wall of the container and forms a covering of the inner and outer sealing element. For example, the cap may be lined to cover the peripheral edge of the wall around the flow-through opening when tightened.

As mentioned above, in certain embodiments, both the outer and inner sealing members may comprise cylindrical (more particularly annular) threaded members. Both parts can be coupled together by screwing the parts together so that the cylindrical part of the outer sealing element will move in axial direction (in use towards the wall of the container) so as to move the pressing edge thereof towards the wall.

Preferably, the threaded coupling is a conical threaded coupling (preferably multi-thread), and even more preferably, the threaded coupling is a threaded coupling as described in patent publication WO 2015/041528 A1, the contents of which are to be considered herein.

In a further embodiment, the outer and / or inner closing element is made of two or more components, wherein a first component is a relatively little elastic plastic and a second component is a relatively elastic plastic. The elastic component is preferably applied precisely at those places where direct contact with the container takes place and where a good seal is desired on the material of the container.

In a further embodiment, the outer closing element comprises a support part and a pulling turning element, for instance a turning lip. The pull-turn element can herein be pivotally connected to the support part via a linear hinge element. Preferably, the hinge element extends through the pivot point of the supporting part so that the pull-rotating element can function well as a handle with which the outer closing element can be tightened (or loosened) from the rest of the closing unit.

The pull-rotating element can herein be designed to be pivotable between a horizontal starting position in which it extends substantially parallel to the top surface of the support part and an upright operating position in which it extends at an angle to the top surface. In this way a compact size can be realized during transport, while in use the pull-rotating element can still exert maximum moment to open the closing unit.

In further embodiments, the screw thread is designed in several steps to allow the closing elements to extend over substantially the entire circumference when the closing elements are rotated through an angle of less than 180 degrees, preferably less than 90 degrees, even more preferably less than 50 degrees. linking or disconnecting.

The threaded coupling is preferably self-locking. Furthermore, the threaded coupling is preferably designed so that, essentially regardless of the height of the axial force exerted on the sealing element, the sealing element does not loosen by itself.

In another aspect, a wall for a container, in particular a beverage container such as a can, is provided wherein the wall has a flow-through opening and is further configured for mounting the closure unit described herein.

In yet another aspect, a container, in particular a beverage container such as a can, is provided wherein the container has a wall with a beverage flow opening and is further configured for mounting the closure unit described herein.

The invention will be elucidated on the basis of the following description of some embodiments thereof. Reference is made in the description to the attached figures, in which:

Figure 1 shows a perspective view of a container whose through-flow opening is provided with a first embodiment of the closing unit;

Figures 2 and 3 are perspective views in perspective of an outer closing element of a first embodiment of a closing unit, with the pull-rotating element in a folded down and open state, respectively;

Figure 4 is a perspective bottom view of the outer sealing element of the first embodiment of the sealing unit;

Figure 5 shows a perspective view of the inner closing element of the first embodiment of the closing unit;

Figure 6 is a perspective view of an end wall of a container;

Figure 7 is an exploded perspective view of the end wall of Figure 6 and the inner closure element of Figure 5;

Figure 8 is a side view of the end wall of Figure 6 and the inner closure element of Figure 5;

Figure 9 shows a side view of the outer sealing element according to the first embodiment of the sealing unit;

Figure 10 is a partly cut away view of the end wall;

Figure 11 shows a cut-away perspective view of a first and outer closing element of the first embodiment and of an end wall;

Figure 12 shows a cross section of the outer sealing element according to the first embodiment;

Figures 13-21 are views and cross sections of a second embodiment of the closing unit.

Figure 1 shows a view of a container 1, for instance a cylindrical beverage can for holding a beverage, wherein the top end wall 2 is provided with a closing unit 3 according to an embodiment of the invention. The closing unit 3 comprises an inner closing element 4 (shown in Figures 5-8,11,12) and an outer closing element 5 (shown in Figures 2-4,9,11,12). The inner sealing element 4 comprises a bottom ring 14 which is designed to be attachable to the end wall 2 of the container, while the outer sealing element 5 comprises a cap 15 which is designed such that it can be detachably attached to the inner sealing element 4.

The cap 15 comprises an upper ring 13, a double-layer supporting part 16 extending parallel to the end wall 2 of the holder 1, a single-layer pull-rotating element 18 (hereinafter also referred to as the turning lip) pivotable via a hinge 17 with respect to this support part. support member 32 (preferably integrally formed with the bottom layer of the double-layer support member 16), as shown in more detail in Figures 2 and 3. Support parts 16 and 32 close the cap at the top, while pull-rotating element 18 is used to turn the cap on and close, in figure 2 the closing unit 3 is in a horizontal position of the pulling turning element 18 and in figure 3 the closing unit in a upright position (ie the operating position) with an upwardly pivoted pull-and-turn element 18.

In the embodiment shown, the pull rotating element 18 is essentially in the form of a semicircle, the flat edge of the semicircle being formed by the (linear) hinge 17. The hinge is positioned such that it extends through the pivot point of the cap 15. The pull-rotatable member 18 is easily pivoted upward by a user (the grip 21 facilitating user engagement) from the horizontal position shown in Figure 2 to the upright position shown in Figure 3). A user who has grasped the upright pull-rotating element 18 can now easily turn the cap 15 to the left or right (direction 9, rotation about an imaginary axis 8 in the axial direction) around the cap of the closing unit, due to the said position of the hinge or close it.

The cap 15 further comprises two raised edges 22 with a slightly conical shape which ensure that when the pull-rotating element 18 is pressed back into the original closed position, the peripheral edge 24 of the pull-rotating element 18 "snaps" under these edges, so that the pull-rotating element tends to remain in the supine position. Referring to Figures 2 and 3, the sealing unit 3 also includes an anti-tamper feature. In the embodiment shown, the anti-tamper feature comprises an anti-tamper pin 23 formed on the top ring 13, which can be slid into an anti-tamper opening 28. This pin 23 is so long that, with a pull-rotating element 18 in the lying position, it still protrudes slightly above the top surface of the pull-rotating element 18. The pin 23 is further preferably made of plastic, so that the top plastic end can be fused (e.g. by spot welding) with the plastic of the rest of the pull rotary element 18. The fused pin together with the pull rotary element 18 forms a sealed completely, whereby the seal is opened visibly and tangibly when opened, that is to say swiveling the pulling-rotary element 18 upwards, so that the cap can be unscrewed.

Furthermore, the cap 15 includes a pin 26 blocking element which functions to prevent the cap 15 from loosening without breaking the aforementioned anti-tamper feature (seal). The pin 26, when the pulling rotary element 18 is folded down, passes through a corresponding opening 27 in the top ring 13 and then falls into a crescent-shaped recesses 28 arranged in the bottom ring 14 (figure 5). This prevents the cap 15 from rotating the cap 15 relative to the bottom ring 14 in the horizontal position.

As shown in more detail in Figure 4, the cap 15 of the outer sealing element 5 comprises a fastening part 19 provided at the bottom. The fastening part 19 in the embodiment shown comprises a substantially cylindrical wall which is provided on the outwardly directed radial side surface. of external screw thread 20. In a similar manner and as shown in more detail in figure 5, the bottom ring 14 of the inner sealing element 4 comprises a fixing part which comprises a substantially cylindrical wall 39. The cylindrical wall 39 is provided with internal screw thread 25 on the inwardly directed radial side surface. This screw thread 25 can engage on the screw thread 20 of the fastening part 19 of the cap 15.

As shown in Figure 4, the lower annular end 30 of the fastening part 19 comprises an outer surface which is smooth and which, in the closed position of the cap 15, abuts the sealing surface 44 on the underside of the bottom ring 14 so that a good seal between the two sealing elements 4 and 5. The sealing surface 44 can be provided with an annular sealing element (seal) 45 (figure 8). The sealing element can comprise a relatively soft material, such as a thermoplastic elastomer (TPE) or a material with similar properties. The sealing element provides excellent sealing against the smooth lower annular end 30 of the fastening element 19 of the cap 15.

Particularly when the container is intended for storing a carbonated liquid and the pressure inside the container can rise far, such a good seal between the cap 15 and the bottom ring 14 is important. For good sealing, reinforcement ribs 33 are further provided on the inwardly directed radial side surface of the cylindrical part 19. These reinforcement ribs maintain the shape of the cap when the pressure in the container 1 increases. These reinforcing ribs also provide a correct degree of stability of the cylindrical wall as the pressure in the hollow space partially enclosed by the cylindrical wall (which, when closed, communicates with the contents of the container) increases and the (of elastic The cylindrical wall made of material tends to move radially outwards under the influence of the pressure in the container, so as to increase the clamping force between the outer and inner sealing element and thereby improve the degree of sealing.

A circular pressing edge 31 is provided on the underside of the top ring 13 of the cap 15. In the embodiment shown, the pressing edge 31 is formed by a cylindrical flange extending in the axial direction. This flange is concentric with respect to the cylindrical wall of the fastening part 19. The pressing edge 31 is designed such that in use, when the closing unit is closed, it surrounds the fastening part 19 and can press with the bottom 34 against the top of the end wall 2 and thus can offer protection against external influences (i.e. influences from the outside, such as dirt, and / or influences from the inside, for example contents of the container seeping through the sealing unit).

The embodiment of the bottom ring 14 shown in figure 5 can be mounted on the end wall 2 of the container 1 shown in figure 1 and, in more detail, figures 6, 7, 8 and 10, the figures show the bottom ring 14 from below can be pressed against the edge around the drinking opening in the end wall 2 of the container 1 and can be snapped onto the container in this position. On top of the relatively hard plastic material of the radial flange 43 of the bottom ring 14 (Figure 5), a sealing ring 40 of soft (e.g. elastic) sealing material is provided. In the mounted state this sealing material abuts against the underside of the end wall 2 and contributes to a good (airtight) sealing between the bottom ring 14 and the end wall 2. The sealing material can for instance be a thermoplastic elastomer (TPE) or a material with similar properties . In order to mount the frame 14 to the end wall, the bottom ring is provided with an annular mounting edge 41, herein also referred to as the "snap" edge or click edge, because this edge makes it possible to snap the bottom ring onto the holder. To this end, the end wall 2 (which can for instance be made of aluminum) of the container can be constructed with an annular conical edge 50 around the through-flow opening 6, as shown in figures 6-8 and 10. Furthermore, the conical edge 50 is provided with one or more upright protrusions 51. Due to the special conical shape of the edge 50, it is possible to press the plastic bottom ring 14 into the through-flow opening 6 of the aluminum end wall 2 by means of a pressing mechanism (for instance a press) in order to form a firm and connection no longer coming loose between the bottom ring 14 and the holder 1.

The bottom ring 14 is further provided with a number of recesses 42 into which the aforementioned upright protrusions 51 of the end wall 2 fit to prevent the bottom ring 14 from rotating with the cap 15 opening and closing. Figure 5 also shows the aforementioned recesses 29 in the bottom ring into which the anti-rotation pin 26 locks when the pull-rotating element is folded down so as to prevent the opening from opening without breaking the seal.

Figure 8 shows a side view of the (aluminum) end wall 2 of the holder 1 and the (plastic) bottom ring 14. The figure also shows the “snap 'Vclick edge 41 into which the conical upright edge 50 of the end wall 2 falls. The figure also shows the position of the soft sealing ring 40 on the flange 43 to ensure sealing on the surface of the container 1, of the soft sealing ring 45 on the surface 44 for a good sealing of the cap 15 when the cap is tightened in bottom ring.

Figure 9 shows a side view of the cap 15 with the pull-rotating element 18 in the lying position, that is to say flush with the top of the cap. Furthermore, the figure shows the anti-lamper arrangement in the form of the pin 23 which protrudes above the plastic surface of the pull rotary element 18 and can be fused with the pull rotary element so as to serve as a seal.

Figures 11 and 12 show the mutual positions of the first and outer closing element at the position of all parts, while figure 12 shows a cross section of the closing unit 3 together with an end wall. The figure shows, among other things, the special (self-braking) screw thread 20, the sealing edge 30 that provides a seal at the soft seal at the bottom of the bottom ring 14, the reinforcing ribs 33 on the inside of the cap that serve to close the cap at high press to maintain the shape, the edge 31 of the cap, which is completely fitting and adhering (in closed condition of the sealing unit) to the end wall 2 in connection with possible accumulation of moisture during and after any pasteurisation process carried out on the container.

Relative to the closure as described in WO 2015/041528 A1, closure units according to embodiments of the invention can be simplified, for example, by using fewer elements and using less material, lower and flat heights, and simpler production and assembly methods. The number of (plastic) sealing elements can be reduced to two (i.e. an outer and an inner sealing element 4.5). The sealing unit may comprise a bottom ring with a soft seal (e.g. a TPE seal) at the top and a soft seal (e.g. a TPE seal) at the bottom.

The closure unit is preferably provided with the conical threaded coupling as described in WO 2015/041528 A1, the content of which is to be considered as inserted here.

Referring to Figs. 13-21, a further embodiment of a cut-off unit is described. Insofar as this is not specifically indicated, the further embodiment of the closing unit corresponds to the first embodiment described above and a detailed description of the further embodiment is therefore omitted here.

The bottom ring 54 (Fig. 13,14) can be attached to the end wall 2 in one way, for example by clicking / pressing the bottom ring into the end wall in the fits provided for it. Once the bottom ring is clicked in place, it can in principle no longer be pushed back out of the lid (ie the wall of the container) due to the conical shape of the upright edge (which has a resilient capacity but can spring back). the circumferential area around the through-flow opening 6 is punched in the end wall 2 of the container 1. The two storage aluminum projections 51 on this conical edge 50 fall into the provided opening (s) 60 in the bottom ring 54 and ensure that the bottom ring cannot rotate in the aluminum cover.

The recesses 61 on the top of the bottom ring are provided as a “block” of the tamper evidence (seal). The seal on the top of the bottom ring ensures the sealing of liquid between the bottom ring and the end wall. The wall thicknesses and therefore the amount of material (weight) may have decreased.

The cap 80 to open and close the flow opening (ie the drinking hole) has a double plastic layer on one side, which can easily be moved / pushed up by means of the “grip” part, because there is a hinge point in the middle of the cap 80 is fitted. This pushed up “lip” forms the firm grip to loosen the cap with a short stroke (45 degrees). The cap therefore has the possibility to, for example, hide action codes under the flattened pull-turn element (turning lip).

On the bearing surface of the cap 80, two ridges 81 are provided which retain the flat position of the pull-turn element (turning lip) by means of "Snap" connection. The cap has an extra peripheral edge at the bottom and has two functions. The rim provides an additional seal of the contents of the container with respect to the outside world and ensures that the edge of the end wall around the flow opening remains clean. In addition, this peripheral edge provides additional tightening force (screw / nut) in principle when the cap is tightened, so that the inner sealing element is pressed against the aluminum lid and thereby improves the sealing between the inner sealing element and the holder.

The cap 80 is provided with the unique conical screw thread matching the bottom ring, the temper is also clearly positioned on the inside of the raised edge. A small catch that is at a certain angle that is “dragged” in the direction of rotation when the cap is closed and when opened, this catch will fall into the applied blocking of the bottom ring and so block, when turning the catch will bump and thus visibly break the thinly sprayed plastic seal. This is a one-off only with a previously unopened can. "Ribs" are provided on the inside of the cap for reinforcement and deformation at high pressure. At the bottom of the conical screw thread is the smooth part that is pressed into the soft seal when the cap is tightened and thus forms the seal.

The closing unit can, if desired, be easily adjusted in size of the beverage opening (drinking hole). The position of the drinking hole is also flexible, although it can be assumed that it should be positioned as close to the flange of the lid as possible to maximize drinking comfort.

To indicate the consumer of the use, so opening and closing the cap, an “arrow” is punched in the aluminum lid with the direction of rotation to open the cap, this die-cut form is also attached to strengthen the aluminum surface. In addition, a text has been applied to the top of the plastic cap with “lift so that one sees first pulling up the lip, in fact the same movement that is now also the case with the current looks. As soon as the pull / turn lip is raised, a text has also been applied in the second plastic layer with the direction of rotation to open the cap.

Since the sealing unit has a loose cap 80 which is not connected to the other plastic elements, this gives an advantage in separating waste because the cap can be thrown away from the can, for example in the plastic waste bin.

The figures show that the (aluminum) lid can be provided with a conical upright edge with two "lips", these are for fitting in the bottom ring to prevent the plastic element from rotating when the cap is tightened. The conical upright edge acts as a “spring” to “click” the bottom ring into the aluminum lid. It is fixed. The shape cannot be pushed back. The plastic bottom ring is provided with a special recess in which the bottom ring clicks into place, the bottom ring is provided with a soft sealing seal at the top, which ensures that the aluminum tin is sealed against the bottom. There is also a soft seal at the bottom of the bottom ring, which ensures the sealing of the cap. The cap and the bottom ring are both equipped with the special conical screw thread that ensures a firm connection. The cap is equipped with an extra rim that has the function of generating extra tightening force, so that the lid is firmly clamped between the two plastic elements. This rim also has the function of shielding the entire drinking area from dirt, etc.

Referring to Figures 2 and 3, in certain embodiments the cap may be provided with a double layer on the top which can be a hinge can be pushed up, forming the grip to loosen and tighten the cap. There are two edges on the bottom layer that ensure that the folded-down pull-turn element (turning lip) clicks into a flat position.

Referring to the figures, for example figures 15 and 17, the tamper evidence 72 (seal) may be positioned on the inside and on the edge of the cap, on the inside of the storage rim of the cap is a catch 70 with an inclined angle that has a “thrilling” function when closing the cap and a “blocking” function when opening the cap as soon as the catch reaches the notch provided. Because the catch will be at the right angle, the catch will turn to the outside when the cap is turned and thereby visibly break / tear the thinner plastic edge. This only happens once when the cap is opened for the first time.

The shape of the closing unit makes it possible to realize various dimensions of drinking hole openings, small, medium, big size. Due to the use of the “click” bottom ring, the plastic bottom ring element has a narrow edge, which in turn benefits the position of the drinking opening, which must be positioned as close as possible to the flared edge of the can lid for drinking comfort.

The invention is not limited to the embodiments thereof described herein. Numerous modifications, modifications and additions are conceivable, all of which are within the scope of the following claims.

Claims (13)

CONCLUSIONS Closure unit for closing off a flow opening (6) provided in a wall of a container (1), in particular a beverage container such as a can, the closure unit comprising: - an inner closing element (4) which is adapted to be attached to the edge of the wall (2) around the flow opening provided therein, wherein the inner closing element is further adapted to at least connect to the inside of the wall and is provided with a passage for the contents of the container; - an outer closing element (5) arranged to be releasably coupled to the inner closing element (4) for closing the passage provided therein; wherein both the inner closure element and the outer closure element comprise a threaded coupling for flathing the outer closure element to the lower closure element; wherein the outer closing element comprises a circumferential pressure edge (31) which is designed to clamp the outer closing element against the outside of the wall (2) of the holder (1) during tightening, the inner closing element being designed to snap into place at the peripheral edge of the flow opening of the wall of the container. A closure unit according to claim 1, wherein the outer sealing element comprises a cylindrical outer threaded part and the inner sealing element comprises a cylindrical inner threaded part, wherein the outer part can be tightened in the inner part to form a first closure of the holder and wherein the outer closing element comprises a cap provided with the circumferential pressure edge for forming a second closure of the holder. A closure unit according to claim 2, wherein the cap is adapted to clamp on the top of the wall of the container in the tightened condition and to form a covering of the inner and outer closing element. A closure unit according to claim 2 or 3, wherein the cap with a circumferential pressure edge is designed to cover the circumferential edge of the wall around the through-flow opening in the tightened condition. A closing element according to any one of the preceding claims, wherein the outer closing element comprises a support part (16) and a pull-rotate element (18), wherein the pull-rotate element is pivotally connected to the support part via a linear hinge element and wherein the hinge element is connected by the pivot point of the supporting part. A closure unit according to claim 6, wherein the pull-and-turn element is pivotable between a horizontal starting position in which it extends substantially parallel to the upper surface of the support part and an upright operating land in which it extends at an angle to the upper surface. 7. A closure unit according to any one of the preceding claims, wherein the screw thread is multi-threaded and furthermore designed for mutual rotation of the closing elements through an angle of less than 180 degrees, preferably less than 90 degrees, even more preferably less than 50 degrees, the closing elements can essentially be linked or disconnected throughout the perimeter. A closure unit according to any one of the preceding claims, wherein the threaded coupling is self-braking and / or wherein the threaded coupling is designed such that essentially regardless of the height of the axial force exerted on the closing element, the closing element does not loosen itself. A closure unit according to any one of the preceding claims, wherein the outer closure element is made of elastic material and comprises a hollow space which, in closed condition, is in communication with the contents of the container. A closure unit according to any one of the preceding claims, comprising a very obvious feature. 11. Wall for a container, in particular a beverage container such as a can, wherein the wall has a through-flow opening and is further designed for fixing a sealing unit according to one of the preceding claims. A wall according to claim 11, comprising an upright peripheral edge (50) around the flow opening, wherein, preferably, the upright peripheral edge extends at least partially obliquely with respect to the remaining part of the wall and / or a partially convex shape in section has. A container, in particular a beverage container such as a can, wherein the container has a wall with a through-flow opening for beverage and is further designed for attaching a sealing unit according to any of claims 1-10. 1/15