Opening device for a package and package with opening device

Abstract

An opening device (3) for a package (1) having a body (2) filled with a pourable product is described. The opening device (3) comprises a collar (9) having an inner surface (15) delimiting a flow channel (10) of the pourable product and having a pouring outlet (11), a closure assembly (12) coupled to the collar (9) and configured to selectively open and close the pouring outlet (11), and one or more annular protruding elements (19) extending from the inner surface (15) and into the flow channel (10). The closure assembly (12) comprises a closure piece (17) and a sealing lip (18) extending from the closure piece (17), the closure piece (17) being configured to selectively open and close the pouring outlet (11) when in an open position and a closed position, respectively. The sealing lip (18) extends into the flow channel (10) when the closure piece (17) is in the closed position. The sealing lip (18) interacts with at least one of the one or more annular protruding elements (19) to seal the pouring outlet (11) in cooperation with the annular protruding element (19) when the closure piece (17) is in the closed position.

Description

Technical Field

[0001] The present invention relates to an opening device for packaging, particularly for packaging having a body filled with a pourable product, or more specifically, a body filled with a pourable food.

[0002] Furthermore, the present invention also relates to a package having a body filled with a pourable product, or more specifically, a pourable food, and an opening device connected to the body. Background Technology

[0003] As is well known, many liquids or pourable foods, such as juice, milk, dairy-based beverages, drinkable yogurt, wine, ketchup, salt, sugar, etc., are sold in packaged form, especially in sealed packages made of aseptic packaging materials.

[0004] A typical example is the parallelepiped-shaped packaging for pourable foods, known as Tetra BrikAseptic (registered trademark), which is made by sealing and folding laminated strip packaging material. The packaging material has a multi-layered structure comprising cardboard and / or paper base layers, with heat-sealable plastic material layers, such as polyethylene, covering both sides. For aseptic packaging of products intended for long-term storage, the packaging material also includes an oxygen barrier layer, such as aluminum foil, stacked on top of the heat-sealable plastic material layers and then covered by another heat-sealable plastic material layer, which forms the inner surface of the packaging that ultimately contacts the food.

[0005] Therefore, this type of packaging includes a body formed of multiple layers of packaging material and has a designated pouring opening that allows pourable product to be poured out of the packaging. Additionally, the packaging may include an opening device attached to the body and arranged around the designated pouring opening. The opening device is designed to seal the packaging and allow controlled pouring before the opening device is first opened.

[0006] A typical opening device includes a collar with an inner surface defining a flow channel and a pouring outlet, and a closing assembly configured to selectively open and close the pouring outlet.

[0007] Some closure components also include a closure and a sealing lip, with the sealing lip extending from the closure into the flow channel when the closure covers the pouring outlet. Additionally, the sealing lip contacts the inner surface to seal the flow channel, preventing leakage of pourable product from the flow channel.

[0008] Although known opening devices work satisfactorily, there is still a desire in the art to improve known opening devices, particularly to improve the sealing effect obtained through the connection between the collar and the sealing lip. Summary of the Invention

[0009] Therefore, the object of the present invention is to provide an improved opening device for packaging in a simple and low-cost manner, particularly packaging having a body formed of multiple layers of packaging material, filled with a pourable product, and even more particularly packaging filled with a pourable food product.

[0010] Specifically, one object of the present invention is to provide, in a simple and low-cost manner, an improved opening device for packaging, particularly packaging having a body formed of multiple layers of packaging material and filled with a pourable product, and more particularly, packaging filled with a pourable food, wherein the opening device has improved sealing performance.

[0011] Another object of the present invention is to provide a package, in particular a package having a body formed of a multi-layered packaging material, filled with a pourable product, particularly a pourable food, and having an opening device, particularly an opening device with improved sealing performance, in a simple and low-cost manner.

[0012] According to the present invention, an opening device for a package having a body filled with a pourable product is provided; the opening device includes: a collar having an inner surface defining a flow channel for the pourable product and having a pouring outlet; a closing assembly coupled to the collar and configured to selectively open and close the pouring outlet; and one or more annular protruding elements extending from the inner surface and into the flow channel; wherein the closing assembly includes a closure member and a sealing lip extending from the closure member, the closure member being configured to selectively open and close the pouring outlet when in an open position and a closed position, respectively; wherein when the closure member is in the closed position, the sealing lip extends into the flow channel; wherein, when the closure member is in the closed position, the sealing lip interacts with at least one of the one or more annular protruding elements to cooperate with the annular protruding elements to seal the pouring outlet.

[0013] A further advantageous embodiment of the opening device includes at least two annular protruding elements; wherein the annular protruding elements are axially displaced from each other along the central axis of the collar.

[0014] According to the invention, a package is also provided that is filled with and / or can be filled with a pourable product, and includes an opening device for the package. Attached Figure Description

[0015] Non-limiting embodiments of the invention will be described by way of example with reference to the accompanying drawings, wherein: Figure 1 This is a schematic perspective view of a portion of a package having an opening device according to the invention; some parts have been omitted for clarity. Figure 2 yes Figure 1 A perspective view of the packaging, and focusing on Figure 1 Details of the opening mechanism have been omitted for clarity; Figure 3 yes Figure 1 A perspective view showing the details of the opening mechanism; some parts have been removed for clarity. Figure 4 yes Figure 1 A cross-sectional view of the opening device; some parts have been removed for clarity. Figure 5a yes Figure 1 An enlarged cross-sectional view of the opening device details; some parts have been omitted for clarity. Figure 5b yes Figure 1 An enlarged cross-sectional perspective view of the opening device details; some parts have been removed for clarity. Detailed Implementation

[0016] The number 1 indicates the entire package (shown only to the extent necessary to understand the invention), comprising: - Body 2, particularly body 2 formed of multi-layer packaging material, filled and / or fillable with pourable product, particularly pourable food, and specifically having a designated pouring opening (not shown and known per se), the designated pouring opening being configured to allow the pourable product to flow out of body 2; and - An opening device 3, which is specifically formed of a polymer material, is attached to the body 2 around the designated pouring opening and is configured to seal the designated pouring opening and is controllable to open the designated pouring opening and allow the pourable product to be poured.

[0017] Pouring products can include milk, tomato sauce, dairy-based beverages, yogurt, water, sugar, salt, fruit juice, lotion, etc.

[0018] According to some preferred non-limiting embodiments, the packaging material may include: at least one layer of fibrous material, such as a paper or cardboard layer; and at least two layers of heat-sealable plastic material, such as polyethylene layers, with the fibrous material layers interposed between each other. One of these two heat-sealable plastic material layers may define an inner surface that contacts the body 2 of the pourable product.

[0019] Preferably, the packaging material may also include a gas-barrier and light-blocking material layer, such as aluminum foil or ethylene vinyl alcohol (EVOH) film, which is particularly disposed between one of the heat-sealable plastic material layers and the fiber material layer. Preferably, but not necessarily, the packaging material may also include another heat-sealable plastic material layer inserted between the gas-barrier and light-blocking material layer and the fiber material layer.

[0020] Preferably, each package 1, and in particular the corresponding body 2, can be obtained from a corresponding blank of multilayer packaging material. Specifically, the blank can define the precursor of the corresponding package 1, and in particular the corresponding body 2.

[0021] More specifically, the corresponding blank may include a corresponding designated pouring opening, which may in particular be covered by a separation membrane. The separation membrane may be formed of a gas-barrier material, and in particular, the separation membrane may be defined by a portion of a gas-barrier and light-blocking material layer and / or a heat-sealable plastic material layer.

[0022] According to some preferred non-limiting embodiments, the multi-layer packaging material can be provided in the form of a roll, whereby the blanks can be arranged continuously relative to each other. In the process of forming package 1, the roll is formed into a tube, longitudinally sealed, filled with a pourable product and laterally sealed, and cut according to the extension length of the blank.

[0023] According to a preferred non-limiting embodiment, each opening device 3 can be applied, in particular molded or bonded, to the corresponding body 2 or the corresponding packaging blank. Preferably, each opening device 3 can be molded onto the corresponding packaging blank and surround a designated pouring opening. In particular, and as will be further explained below, a first portion of the opening device 3 can be molded onto the corresponding packaging blank, and a second portion of the opening device 3 can be applied to the first portion after the first portion has been molded.

[0024] In particular, the opening device 3 can be molded using a corresponding mold.

[0025] Special Reference Figure 1 and Figure 2 The main body 2 can extend along the longitudinal axis A, a first transverse axis B perpendicular to the longitudinal axis A, and a second transverse axis C perpendicular to both the first transverse axis B and the longitudinal axis A. Specifically, the extension of the main body 2 along the longitudinal axis A can be larger than the extensions of the main body 2 along the first transverse axis B and the second transverse axis C.

[0026] Preferably, the main body 2 can be in the shape of a parallelepiped.

[0027] According to some preferred, non-limiting embodiments, the body 2 may include a first wall (not shown and known per se), which is particularly transverse to, and even more particularly perpendicular to, the longitudinal axis A, from which the body 2 extends along the longitudinal axis A. Preferably, the first wall may define a support surface for the package 1, particularly the body 2, which may be designed to contact a support, such as a shelf, during use, for example, when displayed at a point of sale or during storage. Specifically, the first wall may define a bottom wall when arranged on a support.

[0028] Preferably, the body 2 may further include a sidewall 4, which is (fixedly) connected to the first wall and extends from the first wall along the longitudinal axis A (in particular substantially parallel to the longitudinal axis A).

[0029] Preferably, the main body 2 may further include a second wall 5 opposite to the first wall and (fixedly) connected to the side wall 4. Specifically, the side wall 4 may be inserted between the first wall and the second wall 5.

[0030] Specifically, when the package 1 is arranged on the support, the second wall 5 can define the top wall.

[0031] According to the non-limiting embodiment shown, the first wall and the second wall 5 can be parallel to each other.

[0032] According to a non-limiting alternative embodiment not shown, the first wall and the second wall 5 may be inclined relative to each other. In particular, the second wall 5 may define an inclined top or a portion of a mountain-shaped top.

[0033] According to some non-limiting embodiments, the second wall 5 may support and / or include a designated dumping opening.

[0034] According to some preferred non-limiting embodiments, the package 1, particularly the body 2, may include an internal space configured to accommodate and / or accommodate a pourable product. Specifically, a first wall, side walls 4, and a second wall 5 may define the internal space.

[0035] Special Reference Figures 1 to 5b The opening device 3 may include: - A collar 9, which defines a flow channel 10 for pourable products and has a pouring outlet 11; and - A closing assembly 12, which is connected to a collar 9 and configured to selectively open and close the pouring outlet 11.

[0036] In addition, the opening device 3 may also include a base frame 13 configured to couple and / or couple the opening device 3 to the body 2, particularly to the second wall 5, and around the designated pouring opening.

[0037] Specifically, the collar 9 can extend from the base frame 13.

[0038] Preferably, the collar 9 and the base frame 13 can be integrally connected to each other. Even more preferably, the collar 9 and the base frame 13 can be made as a single piece.

[0039] Alternatively, the closure component 12 can be manufactured as a separate part. Specifically, the closure component 12 can be attached to the collar 9 after the collar 9 is formed.

[0040] More specifically, the collar 9 may also include an inlet opening 14 configured to allow pourable product to be introduced into the flow channel 10. Specifically, the inlet opening 14 may be arranged opposite the pouring outlet 11.

[0041] More specifically, the collar 9 may extend along the central axis E. Specifically, the pouring outlet 11 and the inlet opening 14 may be arranged at the respective axial ends of the collar 9.

[0042] In addition, the collar 9 includes an inner surface 15 that defines the flow channel 10.

[0043] Additionally, the collar 9 may also include an outer surface 16 opposite to the inner surface 15.

[0044] Special Reference Figure 1 , 3 4 and 5a, the closing assembly 12 includes a closure 17 configured to selectively open and close the pouring outlet 11.

[0045] The closure 17 can move between the following positions: - Closed position, wherein the closure 17 closes and / or covers the pouring outlet 11, specifically to prevent pourable product from flowing out of the pouring outlet 11; and - Open position, wherein the closure 17 can be removed from the pouring outlet 11, specifically for allowing pourable products to flow out through the pouring outlet 11.

[0046] In other words, the closure 17 can be configured to selectively open and close the pouring outlet 11 when it is in the open position and the closed position, respectively.

[0047] Preferably, the closure 17 can be reversibly moved between a closed position and an open position.

[0048] The closure assembly 12 also includes a sealing lip 18 extending from the closure member 17, particularly an annular sealing lip 18. In particular, the sealing lip 18 may be integrally connected to the closure member 17.

[0049] More specifically, when the closure 17 is in the closed position, the sealing lip 18 can extend into the flow channel 10.

[0050] Advantageous and particularly relevant Figure 4 , Figure 5a and Figure 5bThe opening device 3 also includes one or more annular protruding elements 19, three of which are shown in this case, extending from the inner surface 15 and into the flow channel 10. Each of the one or more annular protruding elements 19 may be integral with the inner surface 15.

[0051] When the closure 17 is in the closed position, the sealing lip 18 interacts with, in particular contacts with, at least one of the one or more annular protrusions 19 to seal the pouring outlet 11. Specifically, when the closure 17 is in the closed position, the interaction between the sealing lip 18 and the annular protrusions 19 determines the sealing performance of the opening device 3.

[0052] More specifically, by sealing the pouring outlet 11 when the closure 17 is in the closed position, it is ensured that the pourable product will not leak from the flow channel 10 when the closure 17 is in the closed position.

[0053] More precisely, the overall seal of the pouring outlet 11 is caused by the interaction of the sealing lip 18 with at least one of one or more annular protruding elements 19 and the presence of the closure element 17.

[0054] Special Reference Figure 1 , Figure 3 and Figure 5a The closure 17 includes a main wall 25 and a lateral annular wall 26, the lateral annular wall 26 being integrally connected to the main wall 25 and projecting laterally from the main wall 25. Specifically, when the closure 17 is arranged in the closed position, the main wall 25 covers the pouring outlet 11 (in other words, the main wall 25 is stacked on the pouring outlet 11) and the lateral annular wall 26 at least partially surrounds the collar 9, particularly facing the outer surface 16.

[0055] Preferably, the sealing lip 18 is integrally connected to the main wall 25, particularly the inner surface 27 of the main wall 25, and extends from the main wall 25, particularly the inner surface 27 of the main wall 25.

[0056] Specifically, when the closure 17 is in the closed position, the inner surface 27 can face the flow channel 10.

[0057] According to some preferred non-limiting embodiments, the opening device 3 may include at least two, preferably at least three annular protrusions 19. Depending on the actual position of the sealing lip 18 within the flow channel 10 when the closure 17 is in the closed position, it is possible that the sealing lip 18 may only contact one of the annular protrusions 19 (this is still sufficient to improve the sealing of the opening device 3 when the closure 17 is in the closed position). Such an example is, for instance... Figure 4 and 5a As shown.

[0058] It should be noted that the actual position of the sealing lip 18 can vary between the closed positions of the closure 17. Therefore, the sealing lip 18 may be in a position where it contacts only one of the annular protrusions 19, but it may also be in a position where it contacts two or more annular protrusions 19.

[0059] In particular, by having more than one annular protrusion 19, the sealing lip 18 is ensured to interact with at least one of the annular protrusions 19 to achieve a sealing effect, regardless of the actual position.

[0060] Preferably, the annular protruding elements 19 can be axially displaced relative to the central axis E.

[0061] Preferably, each annular protruding element 19 may include a tip portion 28.

[0062] According to some possible implementations, each annular protruding element 19 may have a corresponding radial extension.

[0063] It is possible that the corresponding radial extensions of the annular protrusions 19 may be different from each other, or at least two annular protrusions 19 may have the same radial extension, or at least one annular protrusion 19 may have a radial extension that is different from the radial extensions of the other annular protrusions 19.

[0064] It is also possible that the radial extension of each annular protrusion 19 into the flow channel 10 allows each tip portion 28 to lie on and / or contact the surface of the imaginary cylinder (placed within the flow channel 10). In other words, when considering the cross-section of the annular protrusion 19 relative to a cross-section having a central axis E, the points originating from the tip portions 28 lie on a straight line.

[0065] Preferably, at least one annular protruding element 19 may be arranged adjacent to the dumping outlet 11.

[0066] More precisely, at least one annular protruding element 19 may be adjacent to the edge 29 of the collar 9 and axially displaced from the edge 29 relative to the central axis E, the edge 29 defining the pouring outlet 11.

[0067] According to some preferred, non-limiting embodiments, one or more annular protruding elements 19 may protrude into a first region 30 of the flow channel 10. Specifically, the first region 30 may extend from the pouring outlet 11 toward the inlet opening 14.

[0068] Furthermore, the flow channel 10 may include a second region 31 that is different from the first region 30 and extends toward the inlet opening 14. Specifically, the second region 31 may extend from the first region 30 to the inlet opening 14.

[0069] Preferably, the extension length of the first region 30 corresponds to at most one-third of the extension length of the flow channel 10 from the pouring outlet 11 to the inlet opening 14. In other words, the extension length of the second region 31 corresponds to at least two-thirds of the extension length of the flow channel 10 from the pouring outlet 11 to the inlet opening 14. Therefore, the extension of the sealing lip 18 can be kept within certain limits.

[0070] More specifically, one or more annular protruding elements 19 may be arranged coaxially with respect to the central axis E. Specifically, each tip portion 28 may be located in a corresponding plane perpendicular to the central axis E.

[0071] Preferably, the sealing lip 18 may have an outer diameter equal to or substantially equal to the inner diameter of the collar 9. Alternatively, the outer diameter may be equal to or substantially equal to the inner diameter defined by one or more annular protrusions 19. In this way, it is ensured that the sealing lip 18 can enter the flow channel 10 and interact with at least one of the annular protrusions 19, particularly regardless of the actual position of the sealing lip 18 within the flow channel 10.

[0072] Special Reference Figure 3 , 4 And 5a, the sealing lip 18 may include at least one curved portion, particularly at least one curved end portion 32.

[0073] Additionally, the sealing lip 18 may also include a connecting portion 33 that is connected to, in particular integrally connected to, the closure 17, particularly the main wall 25, and even more particularly the inner surface 27.

[0074] Preferably, at least one curved portion, particularly the curved end portion 32, can be connected to the connecting portion 33.

[0075] Back to Figure 2 , Figure 3 and Figure 4 The opening device 3 may also include a closing element 37, which is arranged and / or may be arranged within the flow channel 10 and is configured to close the flow channel 10 when arranged within it, i.e., the closing element 37 may be arranged within the flow channel 10 to interrupt the fluid connection between the inlet opening 14 and the pouring outlet 11.

[0076] Specifically, the closure element 37 can be arranged within the flow channel 10.

[0077] Preferably, the closure element 37 can be coaxially positioned relative to the collar 9.

[0078] Preferably, the base frame 13, the collar 9, and the closing element 37 can be made as a single piece.

[0079] Specifically, the closure element 37 can be ruptureably secured to the collar 9, particularly the inner surface 15. Even more specifically, during the first movement of the closure element 37 away from the collar 9 and / or away from the flow channel 10, the closure element 37 irreversibly ruptures, that is, when the closure element 37 is repositioned within the flow channel 10, the closure element 37 can re-contact the collar 9, particularly the inner surface 15, but will not be secured to the collar 9, particularly the inner surface 15, again.

[0080] More specifically, the closure element 37 may include: - Membrane wall 38, which is ruptureably secured to collar 9, particularly inner surface 15; and - A connecting structure 39 extends from the membrane wall 38 and operably connects the sealing element 37 to the sealing assembly 12, particularly the sealing member 17.

[0081] Specifically, the connecting structure 39 can be integrated with the membrane wall 38 and can extend from the membrane wall 38.

[0082] More specifically, the membrane wall 38 may be configured to be ruptureably separable from the collar 9, particularly the inner surface 15, in order to allow fluid connection between the inlet opening 14 and the pouring outlet 11, thereby allowing the pouring of the pourable product.

[0083] More specifically, the membrane wall 38 can be controlled between an active position and an inactive position. In the active position, the membrane wall 38 is arranged within the flow channel 10 to interrupt the fluid connection between the pouring outlet 11 and the inlet opening 14. In the inactive position, the membrane wall 38 is positioned outside the flow channel 10 to allow the fluid connection between the pouring outlet 11 and the inlet opening 14.

[0084] Specifically, when the connecting structure 39 connects the sealing element 37, especially the main wall 25, to the sealing member 17, the membrane wall 38 is in the activated position and the inactive position when the sealing member 17 is in the closed position and the open position, respectively.

[0085] More specifically, the connecting structure 39 may be welded and / or bonded and / or fused to the closure assembly 12, particularly the closure 17, and even more particularly the inner surface 27.

[0086] According to some preferred non-limiting embodiments, the closure component 12 may include a coupling ring 40 arranged around the collar 9.

[0087] Specifically, the closure 17 can be connected to, particularly tied to, or even more specifically hinged to, the coupling ring 40.

[0088] Preferably, the closure 17 can be hinged to the coupling ring 40 and can move angularly about the hinge axis between the closed and open positions.

[0089] Preferably, the closure assembly 12 may further include one or more fracturing coupling bridges that are fracturingly connected to the coupling ring 40 and the closure 17, particularly the lateral annular wall 26, and are configured to rupture irreversibly during the first movement of the closure 17 from the closed position to the open position.

[0090] According to some non-limiting embodiments, the base frame 13, collar 9, annular protruding element 19, and closing element 37 can be integrally formed, particularly as a single piece. In particular, the base frame 13, collar 9, and closing element 37 can be formed during the molding process, especially during the molding of the opening device 3 onto the corresponding packaging blank.

[0091] Furthermore, the closure assembly 12 can be connected to the collar 9 after the base frame 13, collar 9 and closure element 37 are formed.

[0092] In other words, the base frame 13, collar 9, annular protrusion 19, and closing element 37 define a first portion of the opening device 3, while the closing assembly 12 defines a second portion of the opening device 3. Thus, after molding the base frame 13, collar 9, annular protrusion 19, and closing element 37, the closing assembly 12 is applied to the collar 9, specifically around the designated pouring opening.

[0093] Specifically, molding the first part onto the blank of the main body 2 or the precursor of the main body 2 depends on the use of the corresponding mold.

[0094] In use, the user receives package 1 with the closure 17 in the closed position. Additionally, the membrane wall 38 is in the activated position and remains ruptureably connected to the collar 9.

[0095] To obtain the pourable product, the user needs to control the closure 17 from the closed position to the open position, which in particular causes the membrane wall 38 to move from the activated position to the deactivated position and for the membrane wall 38 to rupture from the collar 9. This then allows the pourable product to flow from the internal space through the flow channel 10 and out of the pouring outlet 11.

[0096] Subsequently, the closure 17 can be repeatedly moved between the open and closed positions. Each time the closure 17 moves to the closed position, the sealing lip 18 seals the flow channel 10 by interacting with, in particular contacting, at least one of the annular protruding elements 19.

[0097] Specifically, the sealing lip 18 contacts at least one annular protruding element 19 at any angular position.

[0098] The advantages of the opening device 3 and / or packaging 1 according to the present invention will become clear from the foregoing description.

[0099] In particular, by having one or more annular protruding elements 19, the sealing performance of the opening device 3 can be improved compared with the opening devices of the prior art.

[0100] Another advantage is that the sealing performance is not affected by the actual position of the sealing lip 18, which may vary slightly each time the closure 17 is placed in the closed position.

[0101] Another advantage is that the sealing lip 18 ensures a tight seal regardless of the shape of the sealing lip.

[0102] However, it is obvious that changes can be made to the opening device 3 and / or packaging 1 described herein without departing from the scope of protection defined by the appended claims.

Claims

1. An opening device (3) for a package (1) having a body (2) filled with a pourable product; The opening device (3) includes: - A collar (9) having an inner surface (15) defining a flow channel (10) for the pourable product and having a pouring outlet (11); - A closure assembly (12) connected to the collar (9) and configured to selectively open and close the pouring outlet (11); wherein the closure assembly (12) includes a closure member (17) and a sealing lip (18) extending from the closure member (17), the closure member (17) being configured to selectively open and close the pouring outlet (11) when in an open position and a closed position, respectively; - At least two annular protrusions (19) extending from the inner surface (15) and into the flow channel (10); wherein each annular protrusion (19) has a tip portion and a recess portion between two adjacent annular protrusions (19), and the recess portion is recessed away from the tip portion in the radial direction. A sealing element (37) disposed in and / or disposed within the flow channel (10) and configured to close the flow channel (10), the sealing element (37) comprising a membrane wall (38) ruptureably fixed to the inner surface (15) of the collar (9), the sealing element (37) rupturing irreversibly during the first movement of the sealing element (37) away from the collar (9) and / or away from the flow channel (10); When the closure (17) is in the closed position, the sealing lip (18) extends into the flow channel (10); When the closure (17) is in the closed position, the sealing lip (18) contacts at least one of the at least two annular protrusions (19) to cooperate with the annular protrusions (19) to seal the pouring outlet (11); wherein the sealing lip (18) has a surface configured to contact at least one of the tip portions of the at least two annular protrusions (19) when in the closed position, and a gap exists between the surface and the recess when in the closed position; The annular protruding elements (19) are axially displaced from each other along the central axis (E) of the collar.

2. The opening device according to claim 1, wherein each annular protruding element (19) includes a tip portion (28); in, The imaginary cylindrical surface contacts the corresponding tip portion (28) of each annular protrusion (19).

3. The opening device according to claim 1 or 2, wherein each annular protruding element (19) has a corresponding radial extension; The corresponding radial extension of at least one of the annular protrusions (19) is different from the corresponding radial extensions of the other annular protrusions (19).

4. The opening device according to claim 1 or 2, wherein, At least one annular protruding element (19) is arranged adjacent to the pouring outlet (11).

5. The opening device according to claim 1 or 2, wherein, The flow channel (10) includes a first region (30) extending from the pouring outlet (11) and a second region (31) different from the first region (30), and the second region (31) extends from the first region (30) to the inlet opening (14) of the collar (9); Wherein, the extension length of the first region (30) corresponds to at most one-third of the extension length of the flow channel (10) from the dumping outlet (11) to the inlet opening (14); The at least two annular protruding elements (19) extend into the first region (30) of the flow channel (10).

6. The opening device according to claim 1 or 2, wherein, Each of the at least two annular protruding elements (19) is integral with the inner surface (15).

7. The opening device according to claim 1 or 2, wherein, The sealing lip (18) includes at least one curved portion (32).

8. The opening device according to claim 1, wherein, The sealing element (37) includes a connection structure (39) extending from the membrane wall (38) and operably connecting the membrane wall (38) to the sealing member (17).

9. The opening device according to claim 1 or 2 further includes a base frame (13) configured to connect the opening device (3) around a designated pouring opening of the body (2); The collar (9) extends from the base frame (13).

10. The opening device according to claim 1 or 2, wherein, The closure assembly (12) includes at least one coupling ring (40) arranged around the collar (9); The closure (17) is connected to the coupling ring (40).

11. A package (1) filled with and / or capable of being filled with a pourable product, and comprising at least one opening device (3) according to any one of claims 1 to 10.

12. The packaging according to claim 11, wherein the packaging (1) comprises a body (2) having a designated pouring opening and formed of multiple layers of packaging material, wherein the opening device (3) is coupled to the body (2) and surrounds the designated pouring opening.

13. The packaging according to claim 11 or 12, wherein the opening device (3) is molded into the body (2) of the packaging (1).

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