EA013271B1 - Reclosable pouring element for composite cardboard/plastic packing - Google Patents

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), 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 on the shell element in one piece at the opposite end of the shell element (1) from the fixing flange (5). When the pouring element is assembled, the cutting element (2) is situated inside the shell element (1). The outer thread (7) of the cutting element (2) consists of two thread sections comprising two respective thread turns (7A, 7A' and 7B, 7B' ), which extend approximately around a quarter of the periphery of the cutting element (2) and have a gradient that is steeper than the inner thread (16) of the screw lid (3). The inner thread (6) of the shell element (1) consists of two thread sections (6A and 6B), each extending approximately around half the periphery and having a gradient that corresponds to that of the outer thread (7) of the cutting element (2). The lower inner periphery of the shell element (1) has a continuous lip (8) that is oriented downwards and the cutting element (2) has a groove (10) in the vicinity of the outer thread (7) that runs parallel to the lip (8) and is designed to receive said lip (8).

Description

The present invention relates to re-closable filling element for composite cardboard-plastic packaging, in particular packaging for beverages, which contains covering its sealing flange, as well as the main (carrier) part, which is provided with an external thread, cutting through (opening) component, which is supplied and external and internal threads, and a screw cap with internal threads, the cutting component being made by injection molding in the filling position at the end of the main part opposite the fixing flan a and integrally with it at the expense of at least one transversely extending connecting webs, and cutting through the component in the mounted position of the pouring member is disposed within the core.

There are many types of re-closable filling (drain) elements for one-time packaging. These types of screw caps are particularly preferred because they provide a reliable, tightly resealable container, so that the resealable packaging can be shaken without spilling the contents.

This type of casting element is often constructed in three parts, with one part being the main part fitted with a female flange that is securely attached to the top of the composite package. Together with the screw cap, the actual shape of the main part is cylindrical, with a cutting component inside the cylinder that, under the action of the threaded cap, opens the composite package by moving it when the screw cap opens for the first time, from the main part to the inside of the composite package, so that the element forms a pouring hole.

The pouring element, indicated at the beginning and described in detail above, is known from \ ¥ O 02/28728 A1. Due to the hermetic connection of the main part and the cutting component by means of connecting jumpers for assembling this pouring element, the main part and the cutting component must be simply aligned with the screw cap.

Another pouring element of three parts is described in European patent EP 1088764 B1. In addition, here the main part contains an external thread, and the screw cap contains a corresponding internal thread. Also in this case, the cutting component is forcibly pressed along the axis into the composite material when the screw cap is opened for the first time by means of corresponding threads inside the main body or on the outer circumference of the cutting component. In this case, the main part and the cutting component are likewise connected to each other during the manufacture by injection molding, however, the cutting component is also attached at the end of the flange of the main part. Consequently, during assembly, the cutting component and the screw cap must be pushed on or into the main body from different sides in opposite directions.

In addition, three-part bottling element is described in PP 2004/000667, in which, however, the opening component does not move by screwing. The actual opening is performed in this case by a combination of cutting and rotational movement, that is, by a combination of axial and radial movement.

Also according to patent I8 5141133 a pouring element is known, in which the screw cap and the cutting component are made as a whole. This casting element is attached outside with a flange on the composite packaging. In this case, the cylindrical main part is provided with an internal thread in the upper part, and the screw cap is provided with a corresponding external thread. When the screw cap is opened, the cutting component, located in the axial guiding elements in the main part, is pressed down through the packaging material, as a result of which the packaging is opened.

Accordingly, the present invention is based on the task of configuring and improving the casting element for composite cardboard-plastic packages mentioned at the beginning and described in detail above, so that while maintaining a simple three-part construction, an especially simple assembly and strength of the pre-assembled casting element is achieved. In addition, at the first opening, a reliable perforation of the foil overlapping the pouring hole is ensured. In addition, it is desirable that the cutting component penetrates into the package effectively after opening the package.

This goal is achieved by cutting the component with an external thread consisting of two threaded sections, which in each case protrude approximately a quarter of the circumference of the piercing component, and which has a slope steeper than the internal thread of the screw cap, and the component puncturing contains cams projecting radially and distributed circumferentially on the outside, the cams protrude from the upper edge of the piercing component beyond the external thread, so that they form an abutment for the piercing o component, pressed inside the main part during assembly.

In the present invention, it is established that the cutting component is thus always in a certain position. After it is removed from the injection molding mold, several circumferentially distributed radially oriented connecting bridges are provided for connecting the main part and the cutting component, which extend between the lower surface of the cutting component and the upper edge of the main part and which break only

- 1 013271 with mutual penetration. Subsequently, the cutting component is reliably protected from falling out of the main part opened down during transport or use of composite packaging. In addition, even if the casting element is mounted on a composite package, the layer of polyethylene coated on top of the casting hole at the bottom will not be damaged, since the cutting component with the actual cutting tool is positioned so that it is protected inside the core.

In addition, the simultaneous axial mutual penetration of the cap with a thread located on the assembly consisting of the cutting component and the main part is sufficient to install the finally assembled casting element on the composite package.

Finally, falling out of the cutting component into the package after opening and after screwing in the cutting component located on the lower inner edge of the main part is effectively prevented by an edge which is located in the groove of the external thread provided specifically for it, and which thus ensures matched stopper. Edge formation is convenient from the point of view of structural technology to create structural components, the main part / cutting component, and, in addition, the edge also serves as a buffer for the cutting component, which is screwed into the main part during the opening procedure.

By steeply tilting the thread on the cutting element, when unscrewing the cap with a thread, the cutting component very quickly moves with a cutting rotary movement (a combination of rotational and axial movement) into the overlapped casting hole, so that the foil is effectively broken and squeezed into the package without completely breaking, because the cutting through component does not make a complete turnover.

In accordance with another preferred embodiment of the present invention, the outer thread of the main body is provided with a bottom edge that is parallel in cross-section to the mounting flange, and with an inclined upper edge and functions in conjunction with an internal thread in the screw cap. For a simpler (axial) overlapping of the cap with thread, it is preferable that the external thread in the preferred construction of the present invention consists of a plurality of separate threaded sections at a distance from each other at short intervals.

In a further embodiment of the present invention, a slitting component is provided with a plurality of protrusions circumferentially installed radially outwardly that interact with the corresponding inner cams of the core to prevent the slitting component from unscrewing from the core. They unlock the rotation of the cutting component only when the screw cap is screwed in one particular direction, ensuring that it is rotated only clockwise. These protrusions can be formed either by means of cams projecting radially on the outside of the cutting component, and / or by means in each case of horizontal extensions of the upper ends of the threaded sections. More preferably, the cams and the threaded sections are integrated with each other.

In another preferred embodiment of the present invention, a cutting component is provided in the area between the threaded sections to create at least one fracture. This type of rupture acts as a pouring hole and provides residual emptying when the assembly is turned upside down and when the cutting component penetrates the tube inside the package, so that the product to be drained can flow out and the package can be completely emptied.

In accordance with another embodiment of the present invention, a cutting component is provided with a plurality of protruding radial cams distributed circumferentially on its outer side that protrude downward from the upper edge of the cutting component, and their shape corresponds to the cams of the cutting component already described. Preferably, the lower ends of all the cams lie in the same plane, projecting perpendicularly to the vertical axis of the cutting component, and thus serve to safely support the edge at the inner end of the main body.

In accordance with a further preferred embodiment of the present invention, the screw cap comprises at least one internal pressure transfer (force) means which, when unscrewing the threaded cap for the first time, causes the cutting component to move through the raised jaws located inside the cutting component. Such a pressure transmitting means preferably has a trapezoidal shape and is curved concentrically in the direction of the threaded cap, and during the assembly operation facilitates alignment of the threaded cap with respect to the cutting component.

The casting element made in accordance with the present invention preferably comprises a means of protection against unauthorized access, indicating the absence of an autopsy. It can be formed by a flat element, cast under pressure and integral with the screw cap and protruding from it in the radial direction, securely attached to the flange of the main part, and this element is attached to the screw cap with at least one jumper of resilient material.

- 2 013271

In addition, during the assembly procedure of the threaded cap, which is provided with a means of protection against unauthorized access, alignment with respect to the main part is simplified. However, other variants of closures are also known, by the appearance of which one can judge the absence of opening, such as, for example, a strapping tape surrounding a screw cap or the like (in accordance with PQ 2004/000667 A1 in the form of a guarantee ring 25).

Further, the present invention is described in detail based on the drawings illustrating only one example of a preferred embodiment, in which:

in fig. 1 is a vertical sectional view of a reclosable casting element according to the present invention before assembly;

in fig. 2A shows, in a perspective view, an injection molded die-cast part as an integral component and a cutting component before assembly;

in fig. 2B shows the main part with a cutting element in a side view in the direction of arrow II in FIG. 2A;

in fig. 3 is a vertical sectional view of a pouring element according to FIG. 2A and 2B during assembly, where the screw cap already blocks access in the direction of the cutting component;

in fig. 4 shows in vertical section a finally assembled and axially retracted pouring element;

in fig. 5 is shown in perspective view of a pouring element finally assembled and pushed in the axial direction;

in fig. 6 shows a perspective view of a cutting component advanced in the main part, prior to the opening operation;

in fig. 7 is shown in a perspective view, a section through a cutting component advanced in the main part during the opening operation;

in fig. 8 is a sectional perspective view showing a cutting component advanced in the main body after the dissection operation; and in FIG. 9 is a sectional perspective view showing a cutting component advanced in the main body after the dissection operation.

The preferred embodiment of the casting element is shown in the drawings to explain the steps of its manufacture according to the present invention and the method of operation during the opening operation of the package. A casting element made according to the present invention is shown in FIG. 1 in longitudinal section and contains the main part 1, which is integral with the injection-molded cutting component 2, and the screw cap 3. The main part 1 is provided with an external thread 4 on its main cylindrical component and the surrounding flange 5 for connection to the composite package (not shown). The outer thread 4 has a passing lower edge 4B (shown in cross section), which is parallel to the mounting flange 5, and an inclined upper edge 4T to facilitate the use of a slight positive pressure when assembling the cap with thread 3.

On the inside of the main part 1 there are two threaded sections 6A and 6B. For a better understanding of FIG. 2A, the structural assembly comprising the main body 1 and the cutting component 2 is represented in a perspective view and in FIG. 2B in the side view. Here are shown the threaded sections 7A, 7A 'and 7B, 7B', which correspond to the threaded sections 6A and 6B of the external thread 7 of the cutting component 2, with all the threaded sections 6A, 6B and 7A, 7A ', 7B, 7B' having the same steep incline than the slope of the external thread 7 of the main part 1.

FIG. 1 also shows that the main part 1 comprises a circular bent edge 8 at the lower inner end, the function of which is described in detail below.

In addition, on the upper edge of the main part 1, the cam 9 can be discerned inward, serving as an abutment for the cutting component 2, which is further described in more detail.

According to the present invention, the threaded sections 7A, 7A 'and 7B, 7B' have a groove 10 which runs parallel to the edge 8, adapted to accommodate this edge 8 when the cutting-through component 2 protrudes from the main part 1 (position formed by injection molding). This horizontal groove 10 is particularly visible in FIG. 2b.

FIG. 2A also shows that a plurality of cams 11 and 12 are located in the upper region of the cutting component 2, of which only the front pair is visible. In a preferred embodiment of the present invention, each of them is integrally attached to a horizontal extension 7 ′ of a threaded section 7B. The horizontal elongation of 7C can also be seen on the opposite side of the threaded section 7A. If necessary, it can also be distributed cams 12 and elongation 7C and 7.

In the sectional view shown in FIG. 1, it is also possible to clearly distinguish the teeth 13 located along the circumference of the cutting component 2. These teeth 13, in the example of the preferred embodiment, have sharp edges. On the upper inner region of the cutting component 2, on the other hand, protruding cams 14 and 14 ', which are radially directed, can be distinguished.

- 3 013271 inside, which is especially clearly seen in FIG. 2A. The main body 1 is connected to the cutting element 2 by means of connecting bridges 15, which is also clearly seen in FIG. 2

The screw cap 3 has an internal thread 16, corresponding to the slope of the external thread 4 of the main part, and located inside the pressure transfer (force) transfer means 17, which is substantially trapezoidal in shape and located concentrically with respect to the screw cap. The pressure transfer means 17 acts on the cutting component 2 by means of cams 14 and 14 ', which protrude inward during the initial opening of the casting element, causing it to turn along the threaded sections 6 and 7 and thus screw into the inside of the package.

To assemble the casting element according to the present invention, the screw cap 3 first moves over the cutting element 2 protruding from the main body 1, as shown in FIG. 3. Other references to FIG. 3 correspond to FIG. 1 and 2 or 2B.

FIG. 4 shows the final assembled casting element in a vertical section, in which, as a result of movement along the axis of the cap with thread 3, the piercing component 2 also moves along the axis inside the main part 1 without rotation. It is clearly visible that the tips of the teeth 13 are also located at some distance from the lower edge of the main part 1.

Due to the special design of the pressure transfer element 17, precise positioning and alignment of both structural elements is not necessary. By compressing axially, the connecting bridges 15 are broken, and the cutting component 2 advances in the main part, thereby simultaneously the screw cap 3 is detached from the main part 1, so that the external thread 4 of the main part 1 engages with the internal thread 16 of the cover 3. To simplify assembly, male thread 4 is provided with an inclined upper edge 4T and with the lower edge 4B in a horizontal position. Thus, with the axially directed compression, the threads 16 can be more easily brought into contact with the inclined edge 4T.

For clarity, FIG. 5, the final assembled casting element is repeatedly shown in perspective. Here you can see that the casting element proposed in the present invention also contains a means of protection against unauthorized access: for this purpose, the plate 18 is made by injection molding inseparably with the screw cap 3 and connected to it by means of connecting jumpers 19, which is clearly seen in FIG. 5. In this case, the plate 18 is provided with two clamps 20, which fit into the corresponding holes 21 (Fig. 2A) in the flange 5 on the base 1 and which provide a seal for a rigid connection.

Finally, in FIG. 6-9 show the operation of the casting element according to the present invention during the initial opening procedure of the lid 3, which, however, is not shown for clarity. The assembled position of FIG. 4 and 5 (but without cover 3) is shown in FIG. 6. The inside of the cams 9 interact with the outer cams 11 and the end of the combined extensions 7C and 7I of the threaded sections 7A and 7B connected to the cams 11. Unscrewing the cutting component 2 from the main part 1 in the upward direction is effectively blocked by this buffer, because the cutting through component 2 can only be rotated by turning the cover 3 in a counterclockwise direction.

FIG. 7 shows a state in which the teeth are in direct contact with the foil to be pierced (not shown). The pressure along the axis is thus transmitted by means of a pressure transfer means 17 (not shown) to the cams 14 and 14 '.

FIG. 8 and 9, the cutting component 2 is shown in its final position, in which it remains accessible for further use of the cover with repeated scrolling left or right and, thus, reliably prevents the open foil from entering the pouring hole. From this it is clear that the cams 12 (Fig. 8), as well as the cams 11 (Fig. 9), contact at their lower edges with the edge 8 and thus fix the cutting component 2. The same applies to the cams 12 (here not shown). In addition, the groove 10 and all the cams 11 and 12 are diametrically opposite each other, thereby ensuring effective prevention of the cutting of the cutting component 2 inside the package.

Claims (15)

CLAIM 1. A resealable casting element for composite cardboard packaging, in particular beverage packaging, comprising a female fastening flange (5), a main part (1) provided with an external thread (4) and an internal thread (6), a cutting component (2 ) equipped with an external thread (7) and a screw cap (3) with an internal thread (16), the cutting component (2) being injection molded in the filling position at the end of the main part (1) opposite the mounting flange (5) as one the whole with the main part with the connection through at least at least one connecting jumper (15), while the cutting component (2) is located inside the main part (1) in the assembled position of the casting element, characterized in that the external thread (7) of the cutting component (2) contains two threaded sections, each of which has a double thread (7A, 7A 'and 7B, 7B') extending along at least a quarter of the length of the cutting lump - 4 013271 ponenta (2) and having an upward slope steeper than the internal thread (16) of the screw cap (3), and the internal thread (6) of the main part (1) contains two threaded sections (6A and 6B), each of which runs along about half the length of the cutting component and has an upward slope corresponding to the upward slope of the external thread (7) of the cutting component (2), the main part (1) contains a downward curved edge (8) on its inner perimeter and a cutting component ( 2) equipped in the area of its external thread (7) continuous a groove (10) which is parallel to the edge (8) with the possibility of receiving the edge (8) when the cutting element (2) protrudes from the main part (1). 2. A casting element according to claim 1, characterized in that the external thread (4) of the main part (1) has a lower edge (4B), which in cross section is parallel to the mounting flange (5), and an inclined upper edge (4T), which interacts with the internal thread (16) in the screw cap (3). 3. A casting element according to claim 1 or 2, characterized in that the external thread (4) consists of many separate threaded sections. 4. A casting element according to any one of claims 1 to 3, characterized in that the cutting component (2) has a plurality of circumferentially oriented, oriented radially and outwardly projecting, which interact with the corresponding inner cams (9) on the basis of (1) and thereby preventing the twisting of the cutting component (2) from the main part (1). 5. A casting element according to claim 4, characterized in that the protrusions located on the outside of the cutting component (2) contain radially oriented cams (11). 6. The casting element according to claim 4, characterized in that the protrusions are formed from each of the horizontal extensions (7C, 7Ό) of the upper ends of the threaded sections (7A and 7B). 7. The casting element according to claims 5 and 6, characterized in that the cams (11) and threaded sections (7A and 7B) enter into each other. 8. A casting element according to any one of claims 1 to 7, characterized in that the cutting component (2) has at least one gap (XV) in the region between the threaded sections (7A, 7A 'and 7B, 7B'). 9. A casting element according to any one of claims 1 to 8, characterized in that the cutting component (2) is provided with a plurality of circumferentially spaced and radially protruding cams (12) on its outer side, which are directed from the upper edge of the cutting component (2 ) down and formed in the same way as the cams (11). 10. A casting element according to claim 9, characterized in that the lower ends of the cams (11) are located together along a surface perpendicular to the vertical axis of the cutting component (2), so as to support the specified edge (8) for the cutting component (2) as his nomination from the main part (1). 11. The casting element according to claim 9, characterized in that the lower ends of the cams (12) are located together along the surface perpendicular to the vertical axis of the cutting component (2), so as to provide support on the edge (8) for the cutting component (2) as it nominations from the main part (1). 12. A casting element according to any one of claims 1 to 11, characterized in that the screw cap (3) has at least one pressure transmitting means (17) located inside it, which upon initial opening and rotation of the screw cap (3) above the cams (14) on the inner side of the cutting component (2) causes the cutting component (2) to move. 13. A casting element according to any one of claims 1 to 12, characterized in that at least one of the means for transmitting pressure (17) is essentially trapezoidal and oriented concentrically with respect to the screw cap (3). 14. The casting element according to any one of claims 1 to 13, characterized in that it is equipped with a means of protection against unauthorized access. 15. A casting element according to claim 14, characterized in that it has a flat plate (18), injection molded inseparably with a screw cap and protruding radially from it as a means of protection against unauthorized access and which is rigidly attached to the flange (5 ) based on (1) before the final assembly of the casting element.