Resealable dispensing element attached with a screw lid for panel / plastic composite packages and method for installing a screw

Abstract

A resealable dispensing element for a composite package (P) is shown and described, comprising:-a body (3) with a flange (4) and a hollow cylindrical spout (5) with at least one external thread (6),-opening means movably guided in the spout (5) for opening the composite package (P), and-a resealable screw cap (2) having an anchoring ring (13), where the screw cap (2) is intended to actuate the opening device when the composite package (P) is opened for the first time, and where the screw cap (2) and the anchoring ring (13) are connected to the body (3) by means of a plurality of bridges of breakable material or at least by means of material anchors, wherein the main body (3) on the nozzle (5) has at least one circumferential web (10A) for securely holding the anchoring ring (13), and wherein the anchoring ring (13) has a circumferential holding web (17) on the inner side thereof, which is shaped such that it corresponds to the circumferential web (10A), and a method for installing said screw cap (2) for such a dispensing element (1). In order to reliably eliminate the inclination of the anchoring ring (13) during the installation of the distribution element (1), it is provided that the main body (3) has a plurality of vertical guide ribs (9) which are arranged so as to be distributed on the circumference on the nozzle (5) between the external thread (6) and the circumferential web (10A) for uniformly stretching the anchoring ring (13) when the screw cap (2) is applied during the installation of the distribution element (1).

Description

Technical Field

[0001] The present invention relates to a resealable dispensing element for a paperboard / plastic composite package, comprising:

[0002] - a body having a flange and a hollow cylindrical spout having at least one external thread,

[0003] - an opening device, which is movably guided in the spout for opening the composite package, and

[0004] a resealable screw cap having an anchoring ring, wherein the screw cap is used to actuate the opening device when the composite package is opened for the first time, and wherein the screw cap and the anchoring ring are connected by a plurality of breakable material bridges or at least by a material anchoring for connection to the body,

[0005] In which the body on the nozzle has at least one circumferential web for securely holding an anchoring ring, and in which the anchoring ring has a circumferential retaining web on its inner side which is shaped so that it corresponds to the circumferential web, and a method for mounting a screw cap for such a dispensing element. Background Art

[0006] A generic resealable dispensing element is known from DE 20 202 1 103 289 U1, which is assigned to the applicant.

[0007] This dispensing element is integrated as a part of the gable of the composite packaging, for simplifying the handling during pouring and the possibility of resealing the composite packaging.Another known dispensing element is for example shown in EP 1 795 456 A1.The hollow cylindrical cutting element opens the previously airtight composite packaging for the first time, thus forming a dispensing opening, wherein the screw cap enables the composite packaging opened at this time to be resealed.The cutting element movably guided in the spout is provided with a force transfer element, and is driven by the corresponding force transfer element on the screw cap thus.During the first opening process, the cutting element approaches the region to be opened of the composite packaging, and after the first contact of the two elements, at least one cutting tooth of the cutting element separates the composite packaging in the region of the weakened zone.The motion path of at least one cutting element advances corresponds to the weakened zone. Summary of the invention

[0008] The opening process can be divided into the following parts, for example. If the two elements are already in contact in the assembled state, the approach of the above-mentioned cutting element can also be omitted. Then, the cutting element moves through the composite material and separates it from the cutting teeth along the cutting line. This separation process is a combination of separation, plastic deformation and material displacement, in which the uniform and controlled application of force is advantageous. Once most of the circumference is separated, the cutting element begins to fold the free-cut composite material or the closure as a part of the main body to the side, thereby releasing the spout for the contents. The folding is carried out by means of the unseparated remaining part of the weakened zone as a pivot axis, wherein the cutting teeth first and then the outer side of the cutting element apply force to the closure during the folding process and therefore press it to the side. After the dispensing element is fully opened, the composite material piece or the closure is roughly parallel to the central axis along the outer wall of the screwed-in cutting element. This reliably guarantees the free pouring of the product contained in the composite packaging.

[0009] Dispensing elements with such a closure are mainly, but not exclusively, used in aseptic packaging. In this case, previously sterilized foods are packaged under aseptic conditions in a similarly sterilized packaging material in order to obtain a so-called aseptic packaging. In addition to the problem of asepticity, there are various types of composite packaging into which the dispensing element according to the invention can be integrated.

[0010] In the first way, the dispensing element is an integral part of the composite packaging, which is introduced during the manufacturing process of the composite packaging. For this purpose, the cutouts of the composite material, which are initially formed into a packaging sleeve by sealing the longitudinal seams, are usually first connected to the dispensing element in a so-called "form fill and seal" packaging machine (FFS). These semi-formed products, which are open on one side, are then filled with the product and subsequently sealed. The first step can be provided in different ways: for example, the flange can be connected to one side of the packaging sleeve by another plastic element, which is injection molded directly in the packaging machine. The flange can also be directly welded to the packaging sleeve or even adhered to the packaging sleeve without the use of additional plastic elements.

[0011] In the second way, an initially completely sealed composite package is manufactured, wherein in the composite package there is usually a punching hole in the gable area, into which the dispensing element is introduced. The dispensing element is usually inserted by welding a flange to at least one layer of composite material. Alternatively, these parts can also be bonded. The feature of this second type of composite package is also particularly that the insertion of the dispensing element can be independent of the manufacture of the composite package. Therefore, the manufacture of the hole and the insertion of the dispensing element can be carried out in each case before, during or after the manufacture of the composite package itself. Both steps are preferably before manufacture so as not to make the packaging machine itself unnecessarily complicated. This arrangement of the production steps also represents the simplest possibility of inserting the dispensing element into the punching hole from the inside.

[0012] Another type involves composite packaging with so-called overcoated holes (OCH = overcoated holes). In this case, liquid plastic and a barrier layer are applied on one or both sides of the punched hole before folding and producing the packaging sleeve, resulting in the packaging being sealed again in a gas-tight manner in the area of ​​the hole. In composite packaging of this type, the weakened area is formed by the plastic layer, wherein the cut on the first opening of a packaging of this type is made close to the edge of the overcoated hole.

[0013] Composite packaging of this type is usually produced in a kind of in two types of packaging machines.In this first alternative, the endless web of the composite material of sterilization is formed into a tube and sealed, and then the tube is filled with similar sterilized products, and sealed and cut at a distance equal to the tube transversely.Then along the pre-folded edge the "packaging cushion" of gained is formed into a parallelepiped package.The sealed seam formed during the transverse sealing in the gable area is generally referred to as the gable seam.The second alternative uses the incision of composite material, which is first formed into a packaging sleeve by sealing the longitudinal seam, and then formed into a package body open on one side on a mandrel, then sterilized, filled and finally sealed and finally formed.

[0014] In general, the gable area can be designed differently, for example as a surface parallel to the base surface (flat gable packaging), as a surface at least partially formed at an angle to the base surface (inclined gable packaging), or also as a saddle top with two oppositely inclined surfaces ("gable top" packaging). The gable can also be designed as a blunt cone. In this case, the flange of the distribution element is square and has sealing surfaces extending downwards in the shape of a pyramidal stump at the edge, which are sealed with the composite material of the packaging, wherein four protruding ears are produced, which are folded over the gable sides and sealed there.

[0015] The precise layer structure of the composite material can vary according to requirements, but at least consists of a carrier layer of cardboard and a covering layer of plastic. In addition, a barrier layer (e.g. aluminum (Al), polyamide (PA) or ethylene vinyl alcohol copolymer (EVOH)) may be necessary to ensure that the sterile product has an increased barrier effect against gases (especially oxygen) and, in the case of aluminum, against light. For this reason, such composite packaging is also referred to as cardboard / plastic composite packaging. If a distribution element is integrated as part of the composite packaging, it should have a strong barrier effect against gases and light similar to the composite material used. At the same time, of course, cheap materials that are easy to recycle together should be used. This also applies in particular to the materials of the distribution elements used.

[0016] Therefore, the dispensing element explained in more detail above usually consists of three separate elements, namely the main body, the opening device and the screw cap. Before sealing with the composite package, it is therefore necessary to assemble the dispensing element consisting of the separate elements. For this purpose, the opening device is introduced into the main body from above and inserted therein until the upper edge of the spout of the main body and the upper edge of the opening device extend roughly in one plane. The opening device is screwed in or pressed in linearly. The screw cap is then pressed onto the main body from above in a predetermined orientation, wherein the anchoring ring and the screw cap are both widened by their hollow cylindrical threaded areas so as to be able to move on the external thread of the hollow cylindrical spout. This process is also known as bouncing.

[0017] If the body on the outer circumference of its hollow cylindrical spout below the external thread has a significantly smaller diameter than the outer diameter of the external thread, it may happen during the pop-up process that the anchor ring tilts after passing through the external thread of the spout during the pop-up process. In this case, the screw cap of the dispensing element slides in front of or behind a part of the anchor ring, so that the screw cap is wedged in a plane extending obliquely to the flange of the body. However, this type of dispensing element can no longer perform its function but must be ejected and disposed of as waste.

[0018] Based on this, the object of the invention is to design and further develop the distribution element mentioned at the outset and described in more detail above in such a way that tilting of the anchoring ring is reliably eliminated during the installation process of the distribution element.

[0019] This object is achieved in the case of a dispensing element having the features of the preamble of claim 1, wherein the body has a plurality of vertical guide ribs which are arranged distributed on the circumference of the nozzle between the external thread and the circumferential webs for uniformly stretching the anchoring ring when applying the screw cap during installation of the dispensing element. According to the invention, the anchoring ring is uniformly widened during the installation process of the screw cap, wherein the anchoring ring is centered during installation. This expands the anchoring ring while expanding the screw cap. The anchoring ring cannot move inwards. The clamping in the installation tool also prevents the anchoring ring from sliding outwards. In this way, an offset of the anchoring ring and the screw cap relative to each other is reliably eliminated.

[0020] According to another preferred embodiment of the invention, the overlap of the circumferential tab and the circumferential retaining tab is 0.5 to 0.7 mm relative to the respective radius. It has been shown that this dimension ensures a reliable connection of the anchoring element to the body without making assembly unnecessarily difficult. The overlap is the difference between the inner radius of the circumferential retaining tab and the outer radius of the circumferential tab. The outer radius is measured outside any existing recess.

[0021] The free rotation of the anchoring ring is also achieved by the interaction of the circumferential webs and the circumferential retaining webs. Thus, not only is free rotation necessary when unscrewing the screw cap, but it is also very helpful to be able to freely rotate the screw cap in its unfolded state so that the pouring flow of the product is not hindered by the screw cap.

[0022] Another embodiment of the invention provides that the upper edges of all transverse guide faces of the vertical guide ribs lie on a common circular line that is as large as the outer circumference of the external thread. This reliably ensures that the anchoring ring expands uniformly after it has passed through the external thread of the nozzle of the main body. It is advantageous to provide additional support from the inside so that the anchoring ring does not deviate (unevenly) inwards during the installation process when forces are applied from above.

[0023] According to another preferred embodiment of the invention, it is provided that the transverse guide surface extends completely axially below the circle line up to the circumferential web. This allows a smooth process during the axial installation movement.

[0024] Another preferred embodiment of the invention provides that the outer radius of the circumferential web is at most 5% greater, particularly preferably at most 4% greater than the radius of the round wire.

[0025] In a further embodiment of the invention, it is provided that the main body has at least six vertical guide ribs which are arranged evenly distributed over its circumference.

[0026] According to another preferred embodiment of the present invention, the main body has ten to twenty-four vertical guide ribs distributed on the circumference thereof.

[0027] According to another preferred embodiment of the invention, it is provided that a slot without material bridges is provided between the anchoring ring and the cover element, and that the anchoring ring has a tether which is integrally connected to the cover element as a material anchor. This design reliably ensures that the screw cap will not come loose from the dispensing element and thus from the composite packaging after unscrewing.

[0028] According to another configuration of the invention, a hollow cylindrical cutting element with at least one cutting tooth is provided as the opening means. This known design has proven itself to ensure reliable initial opening of the composite package when the screw cap is first screwed on. Preferably, the cutting element thus has an external thread on its outer circumference, which interacts with a corresponding internal thread in the hollow cylindrical spout of the body and enables a spiral movement of the cutting tooth.

[0029] In a further preferred embodiment of the invention, provision is made for a circumferential strip to be arranged below the anchoring ring, which is connected to the anchoring ring arranged above it via a plurality of breakable material bridges distributed in the circumferential direction and serves as a tamper-evident seal.

[0030] To this end, it is particularly advantageous if the circumferential strip has on its inner side a plurality of stop elements distributed over the circumference, which, when the screw cap is opened for the first time, hook into vertical locking elements correspondingly arranged on the circumference of the body, so that the material bridges break and visually indicate that opening of the composite packaging has occurred.

[0031] According to another preferred embodiment of the invention, the circumferential web of the body has recesses arranged distributed over its circumference, which in the assembled state of the dispensing element are in each case located above the stop elements of the tamper-evident strip. This makes it easier to install the dispensing element and reliably prevents premature breakage of the material bridge during installation.

[0032] According to another preferred configuration of the invention, the vertical locking element is arranged in the extension of the vertical guide rib. This is advantageous for manufacturing the screw cap in an injection molding tool.

[0033] The invention also relates to a method for mounting a screw cap for a dispensing element, characterized by the following steps:

[0034] - gripping the screw cap around its circumference by means of a holding device to achieve a full 360° support around the circumference,

[0035] - aligning the screw cap by rotating it relative to the body, and

[0036] - The clamped screw cap and the body are moved axially relative to each other until the end position is reached.

[0037] Preferably, the holding device thus has a cavity into which the screw cap is axially moved before final assembly and clamped there. In this way, the dispensing element according to the invention is mounted with optimal support of the dispensing element, so that tilting of the anchoring ring during installation is reliably eliminated. Damage to or displacement of the anchoring ring is reliably avoided by means of a staggered process in which the screw cap is first moved into its end position and then closes the holding device.

[0038] Finally, preferably provide that the screw cap is clamped from the outside only in the axial region without threads or tabs. In this way, the material of the screw cap can deviate outwards in the non-supporting region (i.e. the region with threads or tabs) and remain supported in the remaining regions. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The invention will be explained in more detail below with reference to the accompanying drawings, which only represent a preferred exemplary embodiment, in which:

[0040] Figure 1 is a perspective view of a dispensing element according to the invention,

[0041] Figure 2 is based on Figure 1 A plan view of a dispensing element of the invention,

[0042] Figure 3 is a perspective view from above of the main body of a dispensing element according to the invention,

[0043] Figure 4 is a vertical cross-sectional view of a screw cap of a dispensing element according to the invention,

[0044] Figure 5A yes Figure 2 A vertical section through the line VA-VA of the distribution element according to the invention at the beginning of installation;

[0045] Figure 5B yes Figure 5A Detailed view of a vertical section of

[0046] Fig. 6A yes Figure 2 A vertical cross-section of the distribution element according to the invention along the line VA-VA during installation;

[0047] Figure 6B Is from Fig. 6A Detailed view of a vertical section of

[0048] Fig. 7A is based on Figure 2 A vertical cross-sectional view of the distribution element of the present invention along the line VA-VA after installation

[0049] Figure 7B yes Fig. 7A Detailed view of a vertical cross section. DETAILED DESCRIPTION

[0050] A preferred exemplary embodiment of a dispensing element 1 according to the invention is shown in the drawings. Figure 1 The first dispensing element 1 is shown in a closed state with a vertical axis Z without a composite package P. A resealable screw cap 2 for first opening and for resealing the composite package P is located on the body 3. Figure 1 Only one circumferential flange 4 can be seen from the main body 3, which is used for connection with a composite packaging (not shown) and for integration into the composite packaging (not shown). Figure 2 In the plan view, a section line VA-VA is also drawn.

[0051] exist Figure 1 and Figure 2 The body 3 of the dispensing element 1 according to the invention, which is concealed by the screw cap 2, is located in Figure 3It is shown separately in a perspective view from above. It basically consists of a horizontal flange 4, the outer edge of which is sealed with the package edge of the punched opening in the composite package, and a hollow cylindrical spout 5, as described in more detail below, which has an external thread 6 and an internal thread 7. The internal thread 7 is used to accommodate a cutting element 8, which, however, is only Figure 5A and are also described in more detail there.

[0052] The spout 5 has a plurality of vertical guide ribs 9 arranged on its outer circumference, which are distributed according to the invention on the circumference below the external thread 6. It can be seen that the depth of the vertical guide ribs 9 corresponds approximately to the depth of the external thread 6. The upper edges of all transverse guide surfaces of the vertical guide ribs 9 lie on a common circular line CL and ensure that the screw cap 2 is uniformly widened and centered during the springing process after passing the external thread 6 of the nozzle 5 during the installation process. In addition to the vertical guide ribs 9, circumferential webs 10A can be found in the region of these guide ribs 9, which are not rotationally symmetrically constructed but have recesses in some regions that are not described in more detail. Parallel to this circumferential web 10A and below it, a web section 10B can also be seen, which has the same outer contour as the circumferential web 10A.

[0053] Below the vertical guide rib 9 and in its extension and below the tab section 10B a plurality of vertical tabs can be seen which serve as locking elements 11. Figure 4 The function of these locking elements 11 is described in more detail further in the description of FIG. In the exemplary embodiment shown and preferred in this respect, the screw cap 2 has, in addition to the actual cap element 12, a lower anchoring ring 13 and, in turn, a strip 14 arranged underneath, which is Figure 1 It is also clearly visible from the outside in the perspective view.

[0054] In the exemplary embodiment shown and preferred in this respect, the cover element 12 is connected to the anchoring ring 13 via a one-piece tether T (i.e. a "retaining strap"). To this end, the screw cover 2 is provided with at least one slot S through a circumferential slit blade. In the exemplary embodiment shown and preferred in this respect, there are two slots S, such as from Figure 1 To produce them, two cuts are made in parallel planes. As a result, the screw cap 2 is connected via a tether T, wherein the two tether arms are integrally connected to the anchoring ring 13. However, in Figure 1 In the embodiment of the present invention, only the front "end" of the tether T is visible. However, if only one attachment to the anchoring ring via a single end of the tethering strip is desired, it is also possible to provide only a single slot. In this case, this one cutout extends at least partially in a spiral shape over the circumference, so that the two ends of the slot are at different heights relative to the vertical axis Z.

[0055] Figure 4 A vertical section through a screw cap 2 of a dispensing element 2 according to the invention is shown, wherein the cap element 12, the anchoring ring 13 and the strip 14 of the screw cap 2 are clearly recognizable. The two force transmission elements 15 extending downward from the straight area of ​​the cap element 12 are also particularly clearly visible here. Furthermore, an internal thread 16 can be identified in the cap element 12, which corresponds to the external thread 6 of the spout 5 of the body 3. In addition, Figure 4 It is shown that the anchoring ring 13 has a circumferential retaining web 17 in its lower region. This is described in more detail below.

[0056] at last, Figure 4 It is clearly shown that the strip 14 serving as a tamper-evident seal has on its inner side a plurality of stop elements 18 arranged distributed over the circumference, the arrangement of which is selected in such a way that in the assembled state of the dispensing element 1 according to the invention they are located in the region of the locking elements 11 and below the tabs 10 of the body 3 and engage with the locking elements 11 when the screw cap 2 is opened for the first time, thereby reliably preventing a rotation of the circumferential strip 14. The locking elements 11 are arranged such that they, as in Figure 3 As can be clearly seen in the figure, the anchoring ring 13 and the strip 14 are located below the recesses of the tabs 10A and 10B. The anchoring ring 13 and the strip 14 are connected to each other as a single piece via small material bridges (not shown). During the first opening process, these material bridges break due to the blocking jamming of the circumferential strip 14, thereby signaling to the consumer that the dispensing element 1 has been opened. A tamper-evident seal formed in this way is also called a "tamper-evident element".

[0057] Other FIG. 5A to FIG. 7B It is used to clearly illustrate the installation sequence of the distribution element 1. Therefore, Figure 5A First, the beginning of the installation is shown, with the screw cap 2 just being placed thereon. Fig. 6A Another intermediate position of the screw cap 2 is shown, Fig. 7A The fully assembled dispensing element sealed in the opening of the composite package P is shown.

[0058] Figure 5A Shown along Figure 2 The entire dispensing element 1 in a vertical section along the section line VA-VA of FIG. The body 3 sealed with the flange 4 at the peripheral edge of the opening in the composite package P also has a closure 19 formed in the spout 5. The closure 19 has a central area 20 that closes most of the dispensing opening, an annular weakened area 21 connected to the spout 5, and a conical annular middle area 22 extending between the weakened area 21 and the central area 20. The chamfer of the middle area 22 compensates for the difference in thickness between the central area 20 and the weakened area 21.

[0059] From Figure 5A The area in the dotted circle VB is Figure 5B is shown enlarged in Figure 5A , the position of the screw cap 2 is shown with reference to the body 3 and the opening device inserted therein, which in the illustrated and in this respect preferred exemplary embodiment is designed as a cutting element 8. The internal thread 16 of the cap element 12 is still arranged above the body 3 and the cutting element 8. However, it can be seen that the circumferential retaining tabs 17 of the anchoring ring 13 have already partially passed the external thread 6 of the spout 5, and Figure 5B The enlarged illustration in FIG. 1 clearly shows that the inner diameter of the retaining tab 17 is smaller than the outer diameter of the external thread 6. However, due to the plastic material used, a temporary deformation of the two elements is possible, wherein the circumferential retaining tab 17 is widened. However, due to the recess present in the tab 10A, this expansion occurs unevenly on the circumference of the retaining tab 17.

[0060] exist Fig. 6A and Figure 6B 1 shows another "snapshot" of the installation process of the dispensing element 1 according to the invention, wherein the internal thread 16 of the cover element 12 is already in contact with the external thread 6 of the nozzle 5. The anchoring ring 13 has passed through the thread 6 with its circumferential retaining tabs 17 and is Figure 6B It can be clearly seen in FIG. 1 that the rounded geometry of the vertical guide rib 9 in the upper region ensures that the circumferential retaining web 17 widens uniformly in the region of the vertical guide surface of the guide rib 9. In this way, it is reliably ensured that tilting of the anchoring ring 13 is reliably excluded during the springing process. It can also be seen that the stop element 18 of the circumferential strip 14 has already passed the circumferential web 10A. However, the strip 14 does not have to expand uniformly like the circumferential web 17 of the anchoring ring 13, but only in the short section in which the stop element 18 is located (see FIG. 1 ). Figure 4 ). In addition, the recesses on the previously mentioned tabs 10a and 10b (see Figure 3 ) ensures that this expansion is kept as small as possible, since the stop element 18 is positioned accordingly.

[0061] at last, Fig. 7A and 7BThe dispensing element 1 according to the present invention is shown in its fully assembled position. There is a first thread pair 6 and 16 between the outer side of the screw cap 2 and the spout 5, which enables the screw cap 2 to be screwed on and tightened. A hollow cylindrical cutting element 8 with cutting teeth 23 is arranged inside the body 3, and when the dispensing element 1 and therefore the composite package P are opened for the first time, the hollow cylindrical cutting element 8 separates the closure 19 by destroying a local section of the weakened area 21. The vertical axis (not shown here) is defined by the concentrically arranged hollow cylindrical elements of the spout 5 and the cutting element 8. The cutting element 8 rotates around the vertical axis during the opening process and moves along the axis. The movement is defined by the second thread pair 7 and 25, which is located between the inner side of the spout 5 and the cutting element 8. In this movement, the cutting element 8 is driven by at least one force transmission element 24, which interacts with at least one corresponding force transmission element 15 of the screw cap 2.

[0062] Reference numerals list

[0063] 1 distribution element

[0064] 2 screw caps

[0065] 3. Main Body

[0066] 4 Flange

[0067] 5 nozzles

[0068] 6External thread

[0069] 7 Internal thread

[0070] 8 cutting elements

[0071] 9 Vertical guide ribs

[0072] 10A Circumferential Joint

[0073] 10B splice section

[0074] 11 Locking element

[0075] 12 Cover element

[0076] 13 Anchor ring

[0077] 14 strips (tamper evident seal)

[0078] 15 Force transmission element

[0079] 16 Internal thread

[0080] 17 Keep the tabs

[0081] 18 Stop element

[0082] 19 Closed

[0083] 20Central Area

[0084] 21 Annular Weak Zone

[0085] 22 Conical ring middle area

[0086] 23 cutting teeth

[0087] 24 Force transmission elements

[0088] 25 external thread

[0089] Z vertical axis

[0090] CL round wire

[0091] P composite packaging

[0092] S slot

[0093] T-tether

Claims

1. A resealable dispensing element (1) for a composite package (P) comprising - a body (3) having a flange (4) and a hollow cylindrical spout (5) having at least one external thread (6), - an opening device, movably guided in said spout (5), for opening said composite package (P), and - a resealable screw cap (2) having an anchoring ring (13), wherein When the composite package (P) is opened for the first time, the screw cap (2) is used to drive the opening device, and wherein the screw cap (2) and the anchoring ring (13) are connected via a plurality of breakable material bridges or at least via material anchors for connection to the body (3), The body (3) on the orifice (5) has at least one circumferential tab (10A) for firmly holding the anchor ring (13), and the anchor ring (13) has a circumferential retaining tab (17) on its inner side, the circumferential retaining tab (17) being shaped so that the circumferential retaining tab (17) corresponds to the circumferential tab (10A). It is characterized in that The body (3) has a plurality of vertical guide ribs (9) which are arranged distributed on the circumference of the spout (5) between the external thread (6) and the circumferential web (10A) for uniformly stretching the anchoring ring (13) when the screw cap (2) is applied during installation of the dispensing element (1).

2. The dispensing element according to claim 1, It is characterized in that The overlap of the circumferential web (10A) and the circumferential retaining web (17) is 0.5 to 0.7 mm relative to the respective radius.

3. Dispensing element according to claim 1 or 2, It is characterized in that The upper edges of all the transverse guide surfaces of the vertical guide ribs (9) are located on a common circular line (CL) which is as large as the outer circumference of the external thread (6).

4. The dispensing element according to claim 3, It is characterized in that The transverse guide surface extends completely axially below the circle line (CL) up to the circumferential web (10A).

5. Dispensing element according to claim 3 or 4, It is characterized in that The outer radius of the circumferential web (10A) is at most 5% greater than the radius of the circular line (CL).

6. The dispensing element according to claim 5, It is characterized in that The outer radius of the circumferential web (10A) is at most 4% greater than the radius of the circular line (CL).

7. Dispensing element according to any one of claims 1 to 6, It is characterized in that The main body (3) has at least six vertical guide ribs (9) evenly distributed on its circumference.

8. The dispensing element according to claim 7, It is characterized in that The main body (3) has ten to twenty-four vertical guide ribs (9) distributed on its circumference.

9. Dispensing element according to any one of claims 1 to 8, It is characterized in that A slot without material bridges is provided between the anchoring ring (13) and the cover element (12), and the anchoring ring (13) has a tether (T) integrally connected to the cover element (12) as a material anchor.

10. Dispensing element according to any one of claims 1 to 9, It is characterized in that A circumferential strip (14) is arranged below the anchoring ring (13), which is connected to the anchoring ring (13) arranged above it via a plurality of breakable material bridges distributed in the circumferential direction and serves as a tamper-evident seal.

11. Dispensing element according to claim 10, It is characterized in that The circumferential strip (14) has on its inner side a plurality of stop elements (18) distributed on the circumference, which, when the screw cap (2) is opened for the first time, hook into vertical locking elements (11) correspondingly arranged on the circumference of the body (3), so that the material bridge breaks and visually indicates that the opening of the composite package (P) has occurred.

12. Dispensing element according to claim 11, It is characterized in that The circumferential web (10A) has recesses which are arranged distributed over its circumference and which, in the assembled state of the dispensing element (1), are in each case located above the stop element (18).

13. Dispensing element according to claim 11 or 12, It is characterized in that The vertical locking element (11) is arranged in the extension of the vertical guide rib (9).

14. Method for mounting a screw cap (2) for a dispensing element (1) according to any one of claims 1 to 13, It is characterized by the following steps: - gripping the screw cap around its circumference by means of a holding device to achieve a full 360° support around the circumference, - aligning the screw cap by rotating it relative to the body, and - The clamped screw cap and body are moved axially relative to each other until the end position is reached.

15. The method according to claim 14, It is characterized in that The holding device has a cavity and is characterized in that the screw cap is axially moved into the cavity before final assembly and is clamped after reaching the end position.

16. The method according to claim 15, It is characterized in that The screw cap is clamped from the outside only in an axial region without threads or webs.

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