MX2007015317A

MX2007015317A - Reclosable pouring element for composite cardboard/plastic packaging.

Info

Publication number: MX2007015317A
Application number: MX2007015317A
Authority: MX
Inventors: Felix Rigling
Original assignee: Sig Technology Ag
Priority date: 2006-04-04
Filing date: 2007-04-03
Publication date: 2008-02-11
Also published as: CN101316764A; BRPI0702842A; EA200702017A1; ATE432883T1; CA2603111A1; AU2007221929A1; DE102006016113B3; DE502007000808D1; KR20080114671A; WO2007115978A1; US20090302037A1; MX2007015318A; EP1863717A1; AU2007236004A1; EA013781B1; PL1868903T3; DE502007000811D1; TW200824982A; EA200702016A1; PL1863717T3

Abstract

The invention relates to a reclosable pouring element for composite cardboard/plastic packaging, particularly packaging for beverages, consisting of a shell element (1) that has a continuous fixing flange (5) and an outer thread (4) and an inner thread (6), a cutting element (2) that has an outer thread (7), and a screw lid (3) with an inner thread (16). After injection moulding, the cutting element (2) is moulded in one piece at the opposite end of the shell element (1) from the fixing flange (5) and is attached to said shell element in one piece by means of connecting bridges (15). When the pouring element is assembled, the cutting element (2) is situated inside the shell element (1). To achieve a particularly simple assembly and to ensure the integrity of the pre-assembled pouring element, the outer thread (7) consists of two thread sections (7A and 7B), each extending approximately around a quarter of the periphery of the cutting element (2) and having a gradient that is steeper than the inner thread (16) of the screw lid (3) and the cutting element (2) has protuberances (10) that jut out radially and are distributed around its outer periphery, said protuberances extending axially from the upper edge of the cutting element (2) beyond the outer thread (7) in such a way that they form a stop for the cutting element (2) that is pressed inside the shell element (1) during assembly.

Description

RECHARGEABLE SPILL ELEMENT FOR CARTON / PLASTIC COMPOUND PACKAGING DESCRIPTION OF THE INVENTION The invention relates to a reclosable pouring element for cardboard / plastic composite packaging, in particular beverage packaging consisting of a frame element having a circular mounting flange and an external thread, a perforating element having an external threading and an internal threading and a screw cap with an internal threading, wherein the puncturing element in the injection molding position is produced on the end of the frame element opposite the mounting flange and integrally injection molded with it by means of connecting bridges and wherein the piercing element in the assembly position of the frame element. Recessible pouring elements for one-way packaging are known in various designs for a prolonged period. In this case the designs with a screw cap are particularly popular since they ensure the reliable hermetic retention so that they can be shaken after the packaging has been re-sealed, without any part of the contents being able to escape. Said pouring elements are often constructed in three pieces, wherein a frame element provided with a circular flange is firmly connected to the upper side of the composite pack. Due to the interaction with the screw cap, the actual shape of the frame is cylindrical, where a perforation element, which is operated by the screw cap, is distributed inside the cylinder and has the function of opening the composite packing when moving , when the screw cap is opened for the first time, outside the frame element inside the internal part of the composite packaging so that an opening is generated by pouring below the pouring element. The pouring element specified at the beginning and which is described in detail in the foregoing is known from WO 02/28728 A1. Due to the firm connection to the frame element and the piercing element by means of connecting bridges, for the assembly of that prior art pouring element, the frame element and the piercing element need only be aligned with each other with the screw cap Another three-part pouring element is described in European Patent EP 1 088 764 B l. Also here the frame element has an external thread and a screw cap having a corresponding internal thread. Also in this case the piercing element, when the screw cap is operated for the first time, by corresponding threads within the frame member or on the outer circumference of the piercing element, is urged to be pressed axially into the composite material. In this place, the frame element and the piercing element are likewise connected to one another during production by injection molding, however, the piercing element and the flange end of the frame element are connected thereto. During assembly, therefore, the piercing element and the threaded cap must be guided on or into the frame member from different sides with opposite movements. Furthermore, document WO 2004/000667 describes a three-part pouring element, wherein, however, the opening element does not move by screwing. The actual opening operation is carried out here rather by a combination of a drilling and turning movement, ie a combination of an axial and a radial movement. In addition, a pouring element is known in advance from the U.S. Patent. 5, 141, 133, wherein a threaded cap and a piercing element are integrally produced. This pouring element is joined from the outside with its flange in the composite packaging. In this case, the cylindrical frame has an internal thread in its upper region where the screw cap is provided with a corresponding external thread. When the screw cap opens, the perforation element distributed in axial guides in the frame element is pressed downwardly through the packing material, as a result of which the package is opened. On this basis, the object of the present invention is to configure and refine the pouring element for the cardboard / plastic composite packages mentioned at the beginning and described in further detail in the foregoing, in such a way that, while maintaining a simple construction of three pieces, a particularly simple assembly and a good cohesion of pre-assembled pouring element is obtained. In addition, reliable drilling of the thin sheet covering the pour opening should be ensured when it is first opened. The objective is obtained insofar as the external threading of the drill element consists of two threaded sections, which in each case extend approximately one quarter of the circumference of the drill element and have a pitch which is more inclined than the internal threading of the threaded cap and wherein the piercing elements have cams, which protrude radially and which are distributed on the circumference of their outer side, which extend axially from the upper edge of the piercing element beyond the external threading in such a way that they form a flange for the piercing element pressed into the frame element during assembly. The invention recognizes that the piercing element in this way is always in a defined position: after separation from the injection mold, several arranged radial connecting bridges distributed over the circumference, which run between the lower surface of the piercing element and the The upper edge of the frame element and which are only destroyed when deployed, are provided for the connection between the frame element and the piercing element. Subsequently, the piercing element is reliably prevented from falling from the open frame element downwardly during transport or application of the composite package. Also in the case of a pouring element already applied to the composite packaging, the PE layer of the pouring-on-coating overcoating coating below can not be damaged since the piercing element having the actual piercing members is distributed in a manner which is protected within the frame element. In addition, the simultaneous axial telescopic movement of the threaded cap placed on the unit consists of the piercing element and the frame element is sufficient to allow the final assembly of the pouring element to be applied to a composite package. According to another teaching of the invention, the frame element has at least one internal thread, which consists of two thread sections, which in each case extend approximately one quarter of the circumference and have a pitch which corresponds to the pitch of the external thread of the piercing element. Said inclined threaded passage means that when the threaded cap is twisted, the piercing element moves very rapidly with a rotary drilling movement (combining rotational and axial movements) in a pouring opening on a cover, so that the thin sheet It is reliably destroyed and is pressed into the package, without tearing completely since the perforating element does not make a complete turn. A further preferred embodiment of the invention provides an external threading of the frame element to be double threaded and interacts with the internal threading of the screw cap. For an easier (axial) application of the screw cap it is advantageous if the external thread in a preferred embodiment of the invention consists of a plurality of individual thread sections at a distance from each other with short interruptions. According to a further distribution of the invention, the frame element in its lower inner circumference has a circular lip pointing downwards. This is advantageous from the production point of view when the injection molded / piercing element mounting element is released from the mold and further the lip serves as a flange for the piercing element to be twisted within the frame member during the opening process. A further teaching of the invention makes the provision of the piercing element to have a plurality of projections distributed in the circumference and aligned radially outwardly, which interact with corresponding internal cams of the frame element in order to prevent the piercing element unscrew from the frame element. They release the rotation of the frame member when the screw cap is rotated in only one direction by allowing only counter-clockwise rotation. These projections can be formed either by cams protruding radially on the external side of the frame element or in each case by horizontal extensions of the upper ends of the threaded sections. More preferably, the cams and the threaded sections are fused together. According to another additional embodiment of the invention, provision is made for a perforation element on its outer side having a plurality of protruding radially arranged cams distributed over the circumference, which extend downwards from the upper edge of the element and in their form correspond to the cams of the drilling element already described. Preferably, the lower ends of all the cams are in a common plane, extending perpendicularly to the vertical axis of the piercing element and therefore serve for a secure support on the lip at the inner end of the frame member. According to a further preferred embodiment of the invention, the screw cap has at least one force transfer means located inside, which, when the screw cap is unscrewed for the first time causes the drill element to be move via the protruding cams arranged inside the piercing element. Said force transfer means is preferably implemented trapezoidally and curved concentrically to the screw cap and during the assembly operation which facilitates alignment of the screw cap in relation to the piercing element. A pouring element produced according to the method according to the invention preferably has a tamper-indicating seal. This can be formed by a flat element injection molded integrally with the threaded cap and projecting radially therefrom, which is firmly connected to the flange of the frame element, wherein the element is connected to the threaded cap with as minus a bridge of destructible material. In addition, the alignment in relation to the frame member is facilitated during the assembly operation of the threaded cap that is provided with said tamper indicating seal. However, other versions of closures indicating original condition are known per se, such as for example a band surrounding the screw cap or the like (designated in WO 2004/000667 A1 as "guarantee band 25 '). described below in detail on the basis of the drawing illustrations only of a preferred exemplary embodiment, wherein: Figure 1 shows a reclosable pouring element according to the invention prior to assembly in vertical section; frame and a piercing member integrally molded with it prior to final assembly, in a perspective view, Figure 3 shows the pouring element according to the invention, according to Figure 2 during assembly in vertical section, where the threaded cap already overlaps the piercing element, Figure 4 shows the pouring element assembled finally and deployed axially in vertical section, Figure 5 shows the Finally assembled and axially deployed pouring element, in a perspective view, Figure 6 shows the perforating element pushed inside the frame member before the opening operation, precut in a perspective plan view, Figure 7 shows the perforation element pushed into the frame member during the aperture operation, cut away in perspective illustration, FIG. 8 shows the perforation member pushed inside the frame member after the aperture operation, cut away in a perspective illustration, and Figure 9 shows the piercing element, pushed inside the frame element, cut out or along line IX-IX of Figure 8, in a perspective illustration. A preferred embodiment of a pouring element according to the invention is illustrated in the figures, in order to clarify the process steps in its production and its functional mode during the opening.

In this case, in FIG. 1, a pouring element according to the invention is illustrated in longitudinal section, consisting of a frame element 1, a perforating element 2 injection molded integrally with the frame element 1 on top of it and with a 3 threaded cap. The frame member 1 in its cylindrical main body has an external threading 4 and a circular flange 5 for attachment to a composite packing (not shown). A threaded section 6A can be seen within the frame member 1. To assist in understanding, the sub-assembly consisting of the frame member 1 and the piercing element are illustrated in perspective in Figure 2. There, a threaded section 7A corresponding to the threaded section 6A of an external threading 7 of the element 2 The perforation can be recognized, wherein both threaded sections 6A and 7A have the same gradual pitch compared to the external thread 4. From figure 1 it is evident again that the frame element 1 at its lower inner end has a circular lip 8 whose function will be described in detail later. In addition, a cam 9 protrudes inwardly, which serves as a flange for the piercing element 2 which will be discussed in greater detail in the following, and which can be recognized at the upper edge of the frame member 1. From Figure 2, it is evident that the piercing element, on its upper circumference, has a plurality of cams-Il which protrude radially outwards, where two opposite positioned cams 10 are distributed above the sections 7A and 7B threaded in each case. The additional levers 1 1 and 12 of which only the front part of the opposing positioned pairs are to be recognized in each case, are integrally connected to a horizontal extension 7D of the threaded section 7B in the embodiment illustrated and up to this moment the modality preferred copy. A horizontal extension 7C of the threaded section 7A can also be recognized on the opposite side. However, it is also possible to supply it with cam 12 and extension 7C and 7D. In the cutout according to FIG. 1, there are circularly distributed teeth 13 of the perforation element 2, which can also be clearly seen. These teeth 13 have sharply formed flanks in the preferred and illustrated exemplary embodiment. In the upper internal area of the drilling element 2, the cams 14 projecting radially inward again can be recognized, as is evident in a particularly clear manner from figure 2. The frame element 1 is connected to the bridge drilling element 2 15, as is also evident from Figure 2. The threaded cover 3 has an internal thread 16 corresponding to the pitch of the external thread 4 of the same element 1 and a force transfer means 17 which is inside the running thread. substantially trapezoidal and concentrically towards the screw cap. The force transfer means 17, when the pouring element is first opened, causes the piercing element to rotate along the threaded sections 6 and 7 with the help of the cams 14 protruding inwards and thus Both penetrate axially inside the package. For the assembly of the pouring element according to the invention, the threaded cap 3 now moves next on the perforating element 2 projecting from the frame element 1, as illustrated in figure 3. The reference symbols the remaining in Figure 3 correspond to those of Figures 1 and 2. Figure 4 now shows the pouring element assembled finally in vertical section, wherein as a result of the axial movement of the applied screw cap 3, the piercing element 2 it also moves axially within the frame member 1 without moving rotationally. It is clearly recognized that the tips of the teeth 13 are also arranged at a distance from the lower edge of the frame member 1. Due to the special formation of the force transfer means 17 the exact positioning and alignment of both construction elements is not necessary. As a result of the additional axial pressing together with the connecting bridges 15 the rupture and piercing element 2 is pushed into the frame element 1, wherein the threaded cap 3 is mounted on the frame member 1 at the same time so that the external threading 4 of the frame member 1 comes into contact with the internal threading 16 of the threaded cap 3. In Figure 5, the assembled pouring element is finally again shown in perspective for better clarity. Here, it can be seen that the pouring element according to the invention also has a misuse indicator seal: for this purpose a plate 18 is integrally injection molded onto the threaded cap 3 which is communicated via the connecting bridges 19 with the cap 3 threaded, as is clearly evident from Figure 5. In the present case, the plate 1 8 on its lower lip has two pins 20 which are coupled with corresponding recesses 22 (Figure 2) of the flange 5 of the frame element 1, which are caulked from the bottom for a rigid connection. Figures 6 to 9 finally describe the function of the pouring element according to the invention during the first opening operation of the threaded cover 3. Next, the assembly position of FIGS. 4 and 5, however without the screw cap 3, is shown in FIG. 6. Here, it is recognizable that the internally placed cams 9 interact with the cams 1 1 placed externally or the end of the extensions 7C and 7D of the threaded sections 7A or 7B integrally connected to the cams 1 1. This immobilization means which unscrews the piercing element 2 upwards from the frame element 1 reliably becomes impossible since the piercing element 2 can only rotate in a counterclockwise direction when the 3 threaded cap to unscrew it.

Figure 7 now shows a state where the teeth are in direct contact with the thin sheet (not illustrated) which is to be perforated. It is clearly evident that the lower edges of the cams 10 descend to the respective threaded section 6A or 6B of the internal threading of the frame member 1. Although in each case only the threaded sections of a part 6A, 6B or 7A and 7B, a reliable guide is obtained for the necessary rotary drilling movement. Figures 8 and 9 show the piercing element 2 in its final position where it also remains after further use of the cap 3 threaded by repeated twisting inside and outside and thus reliably clamped again the thin sheet opened from the pouring channel. Here, it can be recognized that both the cams 10 (FIG. 8) and the cams 1 1 (FIG. 9) with their lower edge line upwards on the lip 8 and thus fix the piercing element 2. The same applies to the cams 12 which are not recognizable here. In addition, the cams 10, 11 and 12 are all distributed diametrically opposite each other in each case reliably ensuring that the drilling element 2 can not fall into the packaging.

Claims

CLAIMS 1 . A reclosable pouring element for composite cardboard / plastic packaging, in particular beverage packaging, consisting of a frame element having a circular mounting flange and an external thread, as well as an internal thread, a perforating element having an external thread and a threaded cap with an internal thread, wherein the piercing element in the injection molded position is produced at the end of the frame member opposite the mounting flange, and injection molded integrally therewith via bridges connection and wherein the piercing element in the assembly position of the pouring element is distributed within the frame member, characterized in that the external thread consists of two threaded sections which in each case extend approximately one quarter of the circumference of the piercing element and have a pitch which is more inclined than the internal thread of the threaded cap , wherein the internal thread consists of two threaded sections which, in each case, extend approximately one quarter of the circumference and have a pitch which corresponds to the pitch of the external thread of the piercing element and where the piercing element it has radially projecting cams arranged on the circumference of its outer side, which extend from the upper edge of the piercing element to bypass the external threading in such a way that its lower edges with the respective thread sections of the Internal thread form a flange for the piercing element pressed into the frame member during assembly. 2. The pouring element according to claim 1, characterized in that the external thread of the frame element is double threaded and interacts with the internal thread in the threaded cap. 3. The pouring element according to claim 1 or 2, characterized in that the external thread consists of a plurality of individual threaded sections. 4. The pouring element according to any of claims 1 to 3, characterized in that the frame element on its inner lower circumference has a circular lip and pointing downwards. 5. The pouring element according to any of claims 1 to 4, characterized in that the piercing element has a plurality of projections distributed on the circumference and aligned radially outwardly, which interact with corresponding internal cams of the frame element for the purpose to prevent the piercing element from unscrewing from the frame element. 6. The pouring element according to claim 5, characterized in that the projections are formed by the cams protruding radially on the outer side of the piercing element. 7. The pouring element according to claim 5, characterized in that the projections are formed in each case by horizontal extensions of the upper ends of the threaded sections. 8. The pouring element according to claim 6 and 7, characterized in that the cams and the threaded sections are fused together. 9. The pouring element according to any of claims 1 to 8, characterized in that the piercing element on its outer side has a plurality of cams protruding radially arranged and distributed on the circumference, which extend downwards from the upper edge of the piercing element and in its shape correspond to the cams. 10. The pouring element according to claim 9, characterized in that the lower ends of the cams are in a common plane, which extends perpendicularly to the vertical axis of the piercing element in order to be held in the lip when the element perforation protrudes from the frame element. eleven . The pouring element according to claim 9, characterized in that the lower ends of the cams are in a common plane that extends perpendicularly to the vertical axis of the piercing element in order to be supported on the lip when the piercing element protrudes from the frame element. 12. The pouring element according to any of claims 1 to 11, characterized in that the threaded stage has at least one force transfer means located inside which, when the screw cap is unscrewed for the first time, causes the piercing element to move via cams placed inside the piercing element. 13. The pouring element according to any of claims 1 to 12, characterized in that at least one force transfer means is implemented which runs trapezoidal and concentrically towards the screw cap. 14. The pouring element according to any of claims 1 to 13, characterized in that the pouring element has an improper use indicator seal. 15. The pouring element according to claim 9, characterized in that a flat plate, firmly connected to the rim of the frame element before the final assembly of the pouring element and integrally injection molded with the threaded cap and projecting radially from the same , serves as a hallmark of misuse.