Opening device for a package and package

Abstract

An opening device (3, 3') is described which comprises a color (15) and a cutter (17) at least partially arranged within a flow path (16) defined by the color (15). The opening device (3, 3') further comprises a holding device configured to prevent movement of the cutter (17) from the flow path (16) through the outlet (19) of the color (15). The opening device (3, 3') also comprises a flange (30) protruding from the cutter (17).

Description

Technical Field

[0001] The present invention relates to an opening device for a package filled with a pourable product, particularly a package filled with a pourable food, particularly a composite package.

[0002] The present invention also relates to a package having a body filled with a pourable product, particularly a pourable food, and an opening device disposed on the body.

Background Art

[0003] As is well known, many liquids or pourable foods, such as fruit juice, UHT (ultra-high temperature treated) milk, wine, tomato sauce, etc., are sold in packages made of packaging materials.

[0004] As a typical example, there is a parallelepiped package for pourable foods known as Tetra Brik Aseptic (registered trademark), which is made by sealing and folding a laminated strip-shaped packaging material. This packaging material has a multilayer structure including a base layer of carton and / or paper, and both sides are covered with layers of heat-sealing plastic material, for example, polyethylene. In the case of aseptic packaging for long-term storable products, the packaging material includes a layer of an oxygen barrier material, for example, aluminum foil, which layer overlaps with a layer of heat-sealing plastic material and is further covered with another layer of heat-sealing plastic material to finally form the inner surface of the package that contacts the food.

[0005] Some known packages, particularly the sealed body of a package formed from packaging material, include a predetermined spout that enables the pouring out of the pourable product from the package. Typically, the predetermined spout is covered by a separation membrane that isolates the internal space of the package from the external environment, and its integrity is broken, or cut, or penetrated before the first pouring out of the pourable product. Also, it is known to arrange an opening device having a collar and a closure on the body around the predetermined spout so as to control the pouring out of the pourable product through the collar from the body. Thus, the collar has a spout to enable a controlled pouring out of the pourable product from the package, and the closure enables selectively closing and opening the spout.

[0006] Among known opening devices, there is a cutter for breaking the separation membrane covering the predetermined spout in a controlled manner.

[0007] Although such opening devices function well, in this field, there is a felt need to further improve the opening device and / or the package having the opening device. Summary of the Invention Problems to be Solved by the Invention

[0008] Accordingly, an object of the present invention is to provide an improved opening device for a pourable product, particularly a package filled with a pourable food, particularly a composite package.

[0009] A further object of the present invention is to provide, in a simple and low-cost manner, a package having a body filled with a pourable product, particularly a pourable food, and an opening device applied to the body.

[0010] According to the present invention, an opening device according to the independent claims is provided.

[0011] Further advantageous embodiments of the opening device are defined in the respective dependent claims.

[0012] Also, according to the present invention, there is provided a package according to claim 15.

Means for Solving the Problems

[0013] Hereinafter, two non-limiting embodiments of the present invention will be exemplarily described with reference to the accompanying drawings.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Modes for Carrying Out the Invention

[0015] Reference numeral 1 generally indicates a package, particularly a composite package. The package includes - a main body 2, particularly a composite main body, more particularly a sealed composite main body, filled with a pourable product, particularly a pourable food product, and having a predetermined spout (not shown as it is known) configured to pour the pourable product from the main body 2; and - an opening device 3, particularly an opening device formed from a polymer, attached to the main body 2, particularly around a predetermined spout of the main body 2. and comprises.

[0016] The body 2 may be obtained from a multilayer packaging material and is particularly provided in the form of a web. The packaging material may comprise at least one layer of a fibrous material such as paper or cardboard, and at least two layers of a heat-sealing plastic material such as polyethylene that sandwich the layers of fibrous material between each other. One of these two layers of heat-sealing plastic material may define the inner surface of the body 2 that contacts the pourable product.

[0017] Preferably, the packaging material may also comprise a layer of a gas-barrier and light-barrier material, such as an aluminum foil or an ethylene vinyl alcohol (EVOH) film, disposed particularly between one of the layers of the heat-sealing plastic material and the layer of fibrous material. More preferably, the packaging material may comprise a further layer of heat-sealing plastic material interposed between the layer of gas-barrier and light-barrier material and the layer of fibrous material.

[0018] According to a preferred non-limiting embodiment, each opening device 3 is applied to the respective body 2 before, during or after the forming, filling and sealing of the respective body 2 by a forming process and / or adhesive bonding and / or ultrasonic bonding and / or welding.

[0019] Alternatively, each opening device 3 can be applied to the packaging material before placing the packaging material in a packaging machine to form, fill and seal the respective body 2 from the packaging material, or while advancing the packaging material in the packaging machine.

[0020] According to some possible non-limiting embodiments, the body 2 may contain pourable foods such as water, milk, milk-based beverages, yogurt beverages, coffee-based beverages, fruit juices, beverages with pulp, tomato sauce, salt, sugar, etc.

[0021] Particularly referring to FIG. 1, the body 2 may extend along a central (longitudinal) axis A.

[0022] Preferably, it may include a first wall 4 that is particularly lateral, and more particularly perpendicular, to a central axis A along which the body 2 extends. The first wall 4 may define a support surface of the package 2, and this support surface can be brought into contact with a support element such as a shelf, for example, when in use, for example, when exposed in a sales place, placed in a storage room, placed in a refrigerator, etc. In particular, when placed on a support element, the first wall 4 may define a bottom wall.

[0023] Furthermore, the body 2 may include side walls 5 that are (fixedly) connected to the first wall 4 and extend from the first wall 4.

[0024] Furthermore, the body 2 may include a second wall 6 that faces the first wall 4 and is (fixedly) connected to the side walls 5. In other words, the side walls 5 may be interposed between the first wall 4 and the second wall 6. In particular, when placed on a support element, the second wall 6 may define a top wall.

[0025] According to a non-limiting embodiment, the first wall 4 and the second wall 6 may be parallel to each other.

[0026] Alternatively, the first wall 4 and the second wall 6 may be inclined with respect to each other. In other words, the second wall 6 may define an inclined top or a gabled top.

[0027] In particular, the second wall 6 may include a predetermined spout.

[0028] Furthermore, the body 2 may include a separation membrane that covers a predetermined spout so as to isolate the internal space 7 of the body 2 from the external environment. Furthermore, the separation membrane may be at least partially (and irreversibly) breakable (i.e., openable and / or rupturable and / or cuttable and / or penetrable), in particular so as to allow the loss of the integrity of the separation membrane, whereby the dispensed product can flow out of the body 2.

[0029] Preferably, the separation membrane may comprise a gas and light barrier material, such as an aluminum foil or an ethylene vinyl alcohol (EVOH) film.

[0030] According to a preferred non-limiting embodiment, the separation membrane may be defined by a part of the packaging material, and in particular, a part of the layer of the packaging material is different from the layer of the fibrous material. Preferably, the separation membrane may comprise a part of a layer of a gas barrier material and a light barrier material.

[0031] Referring particularly to FIGS. 1-4, the opening device 3 comprises at least the following: - A collar 15 specifically aligned with a predetermined spout and defining a flow path 16 for the dispensed product; and - A (ring-shaped) cutter 17 configured to break (i.e., rupture and / or cut and / or penetrate and / or open) the separation membrane and at least partially disposed within the collar 15 and / or the flow path 16.

[0032] More specifically, the collar 15 may comprise an inlet 18 configured to allow the inflow of the dispensed product from the internal space 7 into the flow path 16, and an outlet 19 configured to allow the outflow of the dispensed product from the flow path 16 (and the collar 15).

[0033] Preferably, the flow path 16 may extend between the inlet 18 and the outlet 19.

[0034] More specifically, in use, when the integrity of the separation membrane is lost by the operation of the cutter 17 (details will be described further below), the dispensed product can flow from the internal space 7 into the flow path 16 through a predetermined spout and / or the inlet 18, and then flow out from the outlet 19 through the flow path 16.

[0035] More specifically, the collar 15 may comprise an inner surface 20 facing the flow path 16 and / or defining the flow path 16, and an outer surface 21 particularly facing the inner surface 20 (i.e., facing away from the flow path 16).

[0036] In particular, the inner surface 20 may face the cutter 17 in a state where the cutter 17 is at least partially disposed within the flow path 16.

[0037] Furthermore, the collar 15 and / or the flow path 16 may extend along the central axis B.

[0038] Preferably, the collar 15 may have an annular cross-sectional shape in a cross-section perpendicular to the central axis B.

[0039] More preferably, the collar 15 and / or the inlet 18 and / or the outlet 19 may have a (substantially) circular cross-sectional shape, particularly in a cross-section perpendicular to the central axis B.

[0040] The cutter 17 may be disposed within the flow path 16, particularly movably.

[0041] Preferably, the cutter 17 may extend along the central axis C and / or may have the central axis C.

[0042] In particular, the central axis C may be coaxial with the central axis B in a state where the cutter 17 is at least partially disposed within the flow path 16. In other words, when the cutter 17 is at least partially disposed within the flow path 16, the cutter 17 may be coaxial with the collar 15.

[0043] Preferably, the cutter 17 may include at least a cutting portion 22 configured to break the separation membrane. In particular, the cutting portion 22 may include a (curved) saw blade and may be particularly configured.

[0044] Furthermore, the cutting portion 22 may be disposed at the first end 23 of the cutter 17.

[0045] Preferably, the cutter 17 can be controlled between a stationary position where the cutter 17 is separated from the separation membrane (so as to ensure the integrity of the separation membrane) and an operating position where the cutter 17, particularly the cutting portion 22, is configured to break the separation membrane.

[0046] Furthermore, particularly when the package 1 is provided to the final customer, the cutter 17 is arranged at the stationary position and the separation membrane may remain as it is. Further, the control of the cutter 17 from the stationary position to the operating position may be actuated only once. After the separation membrane is destroyed, it is not necessary to repeatedly control the cutter 17 between the operating position and the stationary position.

[0047] The cutter 17 may be arranged at a first axial position and a second axial position with respect to the central axis B when in the stationary position and the operating position, respectively.

[0048] Preferably, the cutter 17 may be (substantially) completely arranged within the flow path 16 when in the stationary position and / or the first axial position.

[0049] The cutter 17 may at least partially extend out of the flow path 16 and through the injection port 18 when in the operating position and / or the second axial position. In particular, at least the cutting portion 22 may extend out of the flow path 16 and through the injection port 18.

[0050] More specifically, the cutter 17 may be closer to the outlet 19 when in the stationary position than when in the operating position.

[0051] As will be described in more detail below, the cutter 17 may be configured to translate at least along the central axis B when moving between the stationary position and the operating position during use. Preferably, the cutter 17 may be configured to translate along the central axis B and rotate about the central axis B when moving between the stationary position and the operating position during use.

[0052] In particular, during use, the cutter 17 moves along the first direction D1 during the movement between the stationary position and the operating position.

[0053] More specifically, the cutter 17 may be annular (i.e., having an annular cross-section in a plane perpendicular to the central axis B).

[0054] The cutter 17 may include an outer surface 24 facing the inner surface 20, especially when the cutter 17 is in the stationary position at least.

[0055] Preferably, the opening device 3 may include an operating device configured to operate and guide the movement of the cutter 17 from the stationary position to the operating position.

[0056] The opening device 3 further includes a holding device configured to prevent the cutter 17 from moving out of the flow path 16 and through the outlet 19. In other words, the holding device ensures that the cutter 17 cannot (accidentally) exit from the flow path 16 through the outlet 19.

[0057] More specifically, the holding device may include the following: - A holding group 31 connected to the inner surface 20 (and the flow path 16), especially protruding from the inner surface 20; and - An interaction group 32 connected to the cutter 17, especially protruding from the cutter, particularly the outer surface 24.

[0058] Furthermore, the holding group 31 and the interaction group 32 may be configured to interact with each other so as to prevent the cutter 17 from moving out of the flow path 16 and through the outlet 19.

[0059] Preferably, the holding group 31 may be integral with the collar 15, and / or the interaction group 32 may be integral with the cutter 17. More preferably, the holding group 31 and the collar 15 may be integrally formed, and / or the cutter 17 and the interaction group 32 may be integrally formed.

[0060] Preferably, the holding group 31 and / or the interaction group 32 may be interposed between the outer surface 24 and the inner surface 20.

[0061] According to some preferred non-limiting embodiments, the interaction group 32 may be interposed between the holding group 31 and the injection port 18, and / or the holding group 31 may be interposed between the interaction group 32 and the discharge port 19.

[0062] More specifically, the interaction group 32 and the holding group 31 may be configured to interact with each other such that the cutter 17 can only move to a certain extent along a second direction D2 opposite to the first direction D1, and also to ensure that the cutter 17 cannot exit through the discharge port 19.

[0063] More specifically, the interaction group 32 and the holding group 31 may be configured to interact with each other in a state where the cutter 17 is positioned at an axial end position with respect to the central axis B and / or is moved to the axial end position. In particular, in a state where the cutter 17 is at the axial end position, the cutter 17 may be at a stationary position or at a position closer to the discharge port 19 than when it is at the stationary position.

[0064] Furthermore, the axial end position may define an axial position of the cutter 17 that is closer to the discharge port 19 than any other axial position of the cutter 17. In particular, the holding group 31 may be configured to define and / or specify the axial end position such that the interaction between the interaction group 32 and the holding group 31 ensures that the cutter 17 cannot move further along the second direction D2 once it reaches the axial end position.

[0065] Furthermore, when the cutter 17 is at the axial end position, it may have the maximum possible distance from the injection port 18.

[0066] Furthermore, the interaction group 32 and the holding group 31 can interact only when the cutter 17 is at the axial end position. In other words, when the cutter 17 reaches the axial end position, the possible movement of the cutter 17 along the second direction D2 is blocked by the interaction between the interaction group 32 and the holding group 31.

[0067] In particular, referring to FIGS. 2 to 4, the holding group 31 may include one or more holding elements 33. In a specific example, two holding elements 33 that are offset from each other are shown.

[0068] The cutter 17 can be easily arranged in the flow path 16 due to the fact that the holding elements 33 are arranged at intervals from each other, that is, arranged at intervals from each other.

[0069] Preferably, the holding elements 33 may be angularly offset from each other about the central axis B.

[0070] Preferably, the holding elements 33 may face each other.

[0071] According to the illustrated specific example, the holding elements 33 may be substantially 180° offset from each other (especially when considering the angular displacement of the respective central points of the holding elements 33 from each other).

[0072] According to some alternative embodiments not shown, the holding group 31 may include one annular holding element 33. Preferably, according to such an embodiment, the annular holding element 33 may have a circular cross-section and may be continuous.

[0073] According to some preferred non-limiting embodiments, each holding element 33 may be formed as a hollow protrusion. In other words, each holding element 33 may include a cavity 39 respectively.

[0074] In particular, since each holding element 33 is hollow, it is possible to reduce the amount of plastic used.

[0075] More specifically, each holding element 33 may comprise, and in particular may consist of, respective curved solid walls 47. In particular, each solid wall 47 may define and / or delimit respective hollow protrusions and / or respective cavities 39.

[0076] Preferably, each solid wall 47 may protrude towards the center of the collar 15 and / or towards the central axis B.

[0077] More specifically, each holding element 33, and in particular each solid wall 47, may be formed convexly towards the center of the collar 15 and / or towards the central axis B.

[0078] Advantageously, each solid wall 47 may be integral with the inner face 20.

[0079] More specifically, each holding element 33, and in particular each solid wall 47, may define respective indentations and / or grooves in the outer face 22.

[0080] Furthermore, each solid wall 47 may have a thickness, preferably (substantially) constant. Preferably, the thickness of the solid wall 47 corresponds to the thickness of the portion of the collar 15 adjacent to and connected to the solid wall 47 and / or one or more other portions of the collar 15.

[0081] According to some preferred non-limiting embodiments, each interaction group 32 may preferably comprise one or more interaction elements integrally connected to and protruding from the cutter 17.

[0082] According to some preferred non-limiting embodiments, the opening device 3, and in particular each cutter 17, may comprise a flange 30.

[0083] The flange 30 may be designed to stabilize the movement of the cutter 17 within the flow path 16.

[0084] More specifically, the flange 30 may interact with the collar 15, particularly the inner surface 20, in order to stabilize the movement of the cutter 17, especially when moving from their respective rest positions to their respective operating positions.

[0085] Preferably, the flange 30 may comprise at least two flange elements 34 arranged at an angle to each other about the central axis C.

[0086] In particular, since the central axis C and the central axis B are coaxial (the cutter 17 is at least partially arranged within the flow channel 16), the flange elements 34 may also be angularly offset from each other with respect to the central axis B.

[0087] By having spaced-apart flange elements 34, the cutter 17 can be easily arranged within the flow channel 16 and the correct operation of the holding device can be ensured.

[0088] According to some preferred non-limiting embodiments, the number of holding elements 33 and the number of flange elements 34 may be equal to each other.

[0089] In particular, respective first spaces may exist between the holding elements 33 and / or respective second spaces may exist between the flange elements 34.

[0090] More specifically, referring particularly to FIG. 2, each flange element 34 may project radially from the cutter 17, particularly from the second end 35 of the cutter 17 opposite the first end 23.

[0091] Preferably, each flange element 34 may project radially from the respective central axis C.

[0092] More specifically, each flange element 34 may project radially from the rim 36 of the second end 35.

[0093] Preferably, each flange element 34 may project towards the inner surface 20 and / or away from the center of the cutter 17.

[0094] According to the illustrated exemplary embodiments, each flange element 34 may be composed of a plate, particularly a plate perpendicular to the central axis C, and / or may be defined by a plate.

[0095] Preferably, each flange element 34 may be arcuate.

[0096] More particularly, each flange element 34 may extend between a respective first angular position and a respective second angular position, particularly with respect to the central axis C.

[0097] Furthermore, each first angular position and each second angular position may define a respective first angular extension of each flange element 34. Preferably, each first angular extension may be measured in radians (°).

[0098] Preferably, each flange element 34 may have the same size as the other flange elements 34. In other words, the respective first angular extensions of each flange element 34 correspond to the respective first angular extensions of the other flange elements 34.

[0099] Referring particularly to FIGS. 2-4, each holding element 33 may project radially from the inner surface 20, particularly towards the center of the collar 15 and / or towards the central axis B.

[0100] Preferably, each holding element 33 may be arcuate.

[0101] More particularly, each holding element 33 may extend between a respective third angular position and a respective fourth angular position.

[0102] Furthermore, each third angular position and each fourth angular position may define a respective second angular extension of each holding element 33. Preferably, each second angular extension may be measured in radians (°).

[0103] Preferably, each holding element 33 may have the same size as the other holding element(s) 33. In other words, each second angular extension of each holding element 33 may correspond to each second angular extension of the other holding element(s) 33.

[0104] Advantageously, each first angular extension may be larger than each second angular extension.

[0105] According to some preferred non-limiting embodiments, the angular distance between the two flange elements 34 may be larger than the second angular extension. In particular, the angular distance is determined between each second angular position of the first flange element 34 and each first angular position of the second flange element 34, especially with respect to the central axis C, and furthermore, no other flange element 34 is interposed between the first flange element 34 and the second flange element 34.

[0106] More specifically, the holding group 31 may comprise a contact surface 37 facing particularly the inlet 18.

[0107] In particular, each holding element 33 may comprise a respective part of the contact surface 37 (in other words, the contact surface 37 is discrete, that is, has non-connected parts).

[0108] Furthermore, the interaction group 32 may have an engagement surface 38 facing particularly the outlet 19.

[0109] The engagement surface 38 may be configured to abut against the contact surface 37 so as to particularly prevent the movement of the cutter 17 out of the flow path 16 and through the outlet 19, especially when the cutter 17 is in the axial end position. In particular, in use, the engagement surface 38 may abut against the contact surface 37 when the cutter 17 is in the axial end position.

[0110] Preferably, each interaction element may carry a part of the engagement surface 38.

[0111] More specifically, referring particularly to FIGS. 1 to 4, the opening device 3 may comprise the following. - A base frame 40 which is arranged around and / or configured to be arranged around a predetermined spout on the body 2, particularly the second wall 6, and which carries the collar 15; and - A closure 41 configured to selectively open and close the outlet 19.

[0112] Furthermore, the opening device 3 may comprise a connecting ring 42 rotatably arranged around the collar 15, particularly such that the connecting ring 42 is inseparable from the collar 15.

[0113] According to some possible non-limiting embodiments not shown, each opening device 3 may comprise a connecting element, preferably a tethering element, connected to the connecting ring 42 and the closure 41, preferably non-breakably.

[0114] Advantageously, the closure 41 may be controllable at least in the following: - A closed position (see FIGS. 1 and 2) in which the closure 41 is configured to cover and / or covers the outlet 19, particularly to prevent the outflow of the poured product from the collar 15; and - An open position (not particularly shown) in which the closure 41 is configured to be spaced from and / or is spaced from the outlet 19 to allow the outflow of the poured product.

[0115] In particular, the closure 41 may be rotatably coupled to the collar 15 (about the central axis B) when in the closed position.

[0116] Advantageously, the release device 3 may comprise an actuating device which is partly associated with (and / or connected to and / or carried by) the collar 15, partly associated with (and / or connected to and / or carried by) the closure 41, partly associated with the cutter 17, and is configured such that rotation of the closure 41 about the central axis B can move the closure 41 from the closed position to the open position and / or towards the open position.

[0117] According to some preferred non-limiting embodiments, the actuating device may comprise a first interaction member (not shown), in particular a flap, connected to the closure 41, and a second interaction member 43 connected to the cutter 17, in particular integrally connected, especially to the main part 23.

[0118] Preferably, the actuating device may also comprise a cam mechanism connected to the collar 15 and / or the cutter 17 and configured to guide the movement of the cutter 17 from the rest position to the operating position.

[0119] Preferably, the cam mechanism may comprise a cam structure 45 connected to the cutter 17, preferably integrally connected to the cutter 17 and protruding from the cutter 17, and a plurality of cam elements (not shown) connected to the collar 15, in particular integrally connected to the collar 15.

[0120] According to some preferred non-limiting embodiments, at least one or more parts of the cam structure 45 may define one or more interaction elements of the interaction group 32. In other words, at least one or more parts of the cam structure 45 may define the engagement surface 38.

[0121] In particular, the first interaction member and the second interaction member 43 may be configured to interact with each other in order to actuate the movement of the cutter 17 from the rest position to the operating position.

[0122] Furthermore, in particular, the rotation of the first interaction member about the central axis B may be actuated, especially by rotational movement, to move the cutter 17 from the rest position to the operating position.

[0123] Preferably, when assembling the opening device 3, the cutter 17 may be brought closer to the collar 15 and the flange element 34 may be aligned with the first gap. Thereafter, the cutter 17 is pushed into the flow channel 16, whereby the flange elements 34 pass through their respective first spaces. Further, the interaction group 32 and / or the cam structure 45 are pressed onto the holding element 33, and thereafter, the cutter 17 can no longer move from the flow channel 16 through the outlet 19.

[0124] In particular, the holding device ensures that the cutter 17 cannot move from the flow channel 16 through the outlet 19.

[0125] In use, when dispensing the product from the package 1, in particular from the body 2, it is necessary to open the outlet 19 and break the separating membrane.

[0126] The separating membrane is broken by moving the cutter 17 from the rest position to the operating position. This is achieved by rotating the first interaction member about the central axis B.

[0127] Referring to FIGS. 5 and 6, the number 3' indicates an alternative embodiment of the opening device according to the invention. Since the opening device 3' is similar to the opening device 3, the following description is limited to the differences between the two, and for the same or corresponding parts, the same reference numbers are used as much as possible.

[0128] In particular, the opening device 3' differs from the opening device 3 in that the holding device, in particular the holding group 31, comprises at least one holding element 33', preferably at least two holding elements 33'.

[0129] The holding element 33' is similar to the holding element 33, and the description of the holding element 33' is limited to the differences regarding the holding element 33'.

[0130] In particular, each holding element 33' is different from each holding element 33 in that it is formed as a solid protrusion.

[0131] In other words, there are no grooves or cavities on the outer surface 21 that delimit the outer part of the holding element 33'.

[0132] The advantages of the opening device 3 and / or the opening device 3' and / or the package 1 according to the present invention will be apparent from the foregoing description.

[0133] In particular, by providing the holding device, it is ensured that the cutter 17 cannot exit from the flow path 16 through the outlet 19.

[0134] Furthermore, when attaching the opening device 3 or the opening device 3', the cutter 17 can be easily arranged in the flow path.

[0135] However, it is obvious that modifications may be made to the opening device 3 or the opening device 3' and / or the package 1 described herein without departing from the scope of protection defined in the appended claims.

Claims

1. An opening device (3, 3') for a package (1) covered with a separation membrane and filled with a dispensing product, wherein the opening device (3, 3') is A collar (15) defines a flow path (16) that extends between an inlet (18) that allows the product to flow in and an outlet (19) that allows the product to flow out, The separation membrane is ruptured, and a cutter (17) is positioned at least partially within the flow path (16), It has at least the following features: The collar (15) has an inner surface (20) facing the flow path (16), The opening device (3, 3') further includes a holding device that prevents the cutter (17) from moving out of the flow path (16) and through the spout (19), The holding device comprises a holding group (31) protruding from the inner surface (20) of the collar (15) and an interaction group (32) connected to the cutter (17). The retaining group (31) and the interaction group (32) interact with each other to prevent the cutter (17) from moving out of the flow path (16) and through the outlet (19), The opening device (3, 3') includes a flange (30) that protrudes from the cutter (17). Opening device (3, 3').

2. The flange (30) comprises at least two flange elements (34) that are positioned at an angle to each other with respect to the first central axis (C) of the cutter (17) and project toward the collar (15). The opening device according to claim 1.

3. The retaining group (31) comprises at least two retaining elements (33, 33') that are angularly offset from each other with respect to the second central axis (B) of the collar (15). The opening device according to claim 2.

4. Each flange element (34) extends between its respective first angular position and its respective second angular position, Each retaining element (33, 33') extends between its respective third angular position and its respective fourth angular position, The first angular extension of the flange element (34) between the first angular position and the second angular position is greater than the second angular extension of the retaining element (33, 33') between the third angular position and the fourth angular position. The opening device according to claim 3.

5. Each flange element (34) extends between its respective first angular position and its respective second angular position, Each retaining element (33, 33') extends between its respective third angular position and its respective fourth angular position, The angular distance between the two flange elements (34) is greater than the angular extension of the retaining elements (33, 33'). The opening device according to claim 2.

6. The number of retaining elements (33, 33') and the number of flange elements (34) are equal to each other. The opening device according to claim 2.

7. The flange element (34) protrudes radially from the cutter (17). The opening device according to claim 2.

8. The flange element (34) is arc-shaped, and / or the retaining group (31) comprises at least two arc-shaped retaining elements (33, 33') that are angularly offset from each other with respect to the second central axis (B) of the collar (15). The opening device according to claim 2.

9. The cutter (17) is configured to break the separation membrane and includes a cutting portion (22) located at the first end portion (23) of the cutter (17). The flange (30) protrudes from the second end (35) of the cutter (17) opposite the first end (23) of the cutter (17). The opening device according to claim 1.

10. The retaining group (31) is provided with a contact surface (37), and the interaction group (32) is provided with an engaging surface (38). The engagement surface (38) is configured to abut against the contact surface (37) so as to prevent the cutter (17) from moving out of the flow path (16) and through the spout (19). The opening device according to claim 1.

11. The retaining group (31) is integrally connected to the collar (15), and / or the flange (30) is integrally connected to the cutter (17). The opening device according to claim 1.

12. The retaining group (31) has at least one hollow projection or at least one solid projection. The opening device according to claim 1.

13. The cutter (17) can be positioned in a stationary position detached from the separation membrane and in an operating position configured to rupture the separation membrane. The opening device includes an actuator that activates the movement of the cutter (17) from the stationary position to the operating position. The opening device according to claim 1.

14. A base frame (40) is provided on the main body (2) and is configured to be applied to and / or applied to the predetermined spout and the collar (15), A closure (41) configured to selectively open and close the aforementioned spout (19), Furthermore, The opening device according to claim 1.

15. A main body (2) filled with an injectable product and covered with a separation membrane, having a predetermined spout, An opening device (3, 3') according to claim 1, which is applied to the predetermined spout, Equipped with, Package (1).

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