Sealing cap for container closure and container closure comprising such sealing cap

Abstract

The invention relates to a sealing cap (23) made of elastic plastic material for a container closure (15), the container closure (15) comprising a container seat base formed on the container, the container seat base being used to arrange the container seat, the container seat having a plug insert (22), the plug insert being arranged in a plug seat (19) formed on the container seat base, the sealing cap (23) comprising a cover disc (24) and an edge skirt (25), the cover disc (24) having a fastening means (29), the fastening means (29) being arranged on the underside (28) of the cover disc (24) and being provided with a locking means (38) for forming a locking connection with the plug insert (22), the edge skirt (25) being arranged at the circumference of the cover disc (24) and being connected to the cover disc (24) via predetermined breaking means (27). The cover plate (24) has a supporting means for supporting the cover plate (24) on the base of the container seat, and the supporting means is arranged radially inwardly adjacent to the predetermined breaking means (27) on the lower side (28) of the cover plate (24).

Description

Technical Field

[0001] The present invention relates to a sealing cap made of an elastic plastic material for a container closure, the container closure comprising a container seat base formed on a container, the container seat base being used to arrange a container seat, the container seat having a plug insert, the plug insert being arranged in the plug seat formed on the container seat base, the sealing cap comprising a cover disc and an edge skirt, the cover disc having a fastening means, the fastening means being arranged on the underside of the cover disc and being provided with a snap-locking means for forming a snap-locking connection with the plug insert, the edge skirt being arranged at the circumference of the cover disc and being connected to the cover disc via a predetermined breaking means. In addition, the present invention relates to a container closure provided with such a sealing cap. Background Art

[0002] A sealing cap of the above-mentioned type is also known from WO 2008 / 139196 A1. The known sealing cap made of a dimensionally elastic plastic has a latching means arranged on the underside of a cover disc, by means of which the sealing cap is connected to a plug insert arranged in a plug seat of a container closure. An edge skirt connected to the cover disc via predetermined breaking means is arranged on the outer circumference of the cover disc, the cover disc protruding through the cover edge over the opening edge of the plug seat, the edge skirt being connected to the cover edge via predetermined breaking means. Destruction of the predetermined breaking means, including at least partial separation of the edge skirt from the cover disc, indicates that an attempt has been made to remove the sealing cap from the container closure.

[0003] The cover disk of the known sealing cap and the cover edge of the cover disk are spaced apart from the plug seat. As a result, the predetermined breaking means are destroyed not only when an attempt is made to remove the sealing cap from the container closure by reaching under the edge, but also when pressure is exerted on the cover disk from above, resulting in a deformation of the cover disk, wherein the pressure is transmitted to the edge skirt via the predetermined breaking means, as a result of which the edge skirt rests on the wall surface of the container surrounding the plug seat. Such loads occur in particular when containers provided with container closures are incorrectly stacked and the upper container placed on the lower container exerts pressure on the cover disk of the sealing cap. Such damage to the predetermined breaking means has the consequence that the desired manipulation protection of the sealing cap is no longer present and therefore a potential subsequent manipulation of the container closure can no longer be detected. Summary of the invention

[0004] The object of the present invention is therefore to provide a sealing cap of the above-mentioned type which has improved functional reliability.

[0005] According to the present invention, the cover plate of the sealing cap has a supporting means for supporting the cover plate on the base of the container seat, and the supporting means is arranged radially inwardly adjacent to the predetermined breaking means on the lower side of the cover plate.

[0006] The supporting means of the sealing cap according to the present invention, which are arranged radially inwardly on the cover disc adjacent to the predetermined breaking means, have the following effect, namely, once the sealing cap is arranged on the container closure and the latching connection between the plug insert is established, there is a force fit between the supporting means and the container seat base of the container seat, as a result of which the deformation of the cover disc in the direction of the seat base due to the external pressure has the following effect, namely, the external load is released into the container seat base via the supporting means, rather than being guided into the edge skirt via the predetermined breaking means.

[0007] In contrast, the fact that the cover edge of the cover disc of the known sealing cap is spaced apart from the plug seat causes the cover edge together with the predetermined breaking means provided on the cover edge and the edge skirt connected to the cover edge to deflect in the direction of the container seat base, which means that the predetermined breaking means can be damaged when the edge skirt contacts or rests on the container seat base. The edge skirt can contact or rest on the container seat base directly or via deposits formed on the container seat base, which deposits allow forces to flow between the edge skirt and the container seat base, which deposits are prone to occur during storage and transportation of such containers. This is particularly true if the container is an IBC that is usually transported and stored repeatedly.

[0008] Preferably, the supporting means is an edge web arranged concentrically with the edge skirt on the underside of the cover disc, so that the supporting effect can be effective continuously over the entire circumference of the sealing cap.

[0009] If the edge web has a lower edge relative to the underside of the cover disc which is recessed relative to the lower edge of the edge skirt, access to the lower edge of the edge web for removing the sealing cap from the plug seat is prevented because the edge skirt is arranged so that it covers the lower edge of the edge web.

[0010] If the locking means of the fastening means is connected to a pull tab arranged at the circumference of the cover disc via connecting means, the connecting means having a cover strip, which is formed in the cover disc and is separated from adjacent areas of the edge skirt, the edge web and the inner part of the cover disc by lateral predetermined breaking means, and is connected to the locking means via the pulling web, the sealing cap can preferably be completely removed from the plug insert, without the edge web serving as a supporting means preventing this removal after the predetermined breaking means formed on the edge skirt have been damaged.

[0011] According to the present invention, the container seat base is a cover for forming a container opening in the container wall, and the cover includes a plug seat, which is arranged in a cover disk of the cover and penetrates the cover disk, so that a supporting means formed on the lower side of the cover disk of the sealing cap rests on the top of the cover disk of the cover, and the edge skirt is spaced apart from the top of the cover disk of the cover.

[0012] Preferably, the plug seat has an opening edge which protrudes from the top of the cover so that the supporting means rests on the opening edge of the plug seat.

[0013] The container closure according to the invention thus constructed allows the sealing cap according to the invention to be used on an IBC.

[0014] The container seat base of the container closure constructed according to the present invention is a wall portion of the container, which includes a plug seat, which is formed in the wall portion so that the supporting means formed on the lower side of the cover disk of the sealing cap rests on the wall surface of the container and the edge skirt is spaced apart from the wall surface of the container.

[0015] The container closure according to the invention thus constructed allows the sealing cap according to the invention to be used on any container, in particular on a keg. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Preferred embodiments of the present invention will be discussed in more detail below with reference to the accompanying drawings.

[0017] Figure 1 is an isometric view of an IBC including a container closure disposed on top of an inner container of the IBC.

[0018] Figure 2 yes Figure 1 An isolated view of a container closure is shown.

[0019] Figure 3 yes Figure 2 A cross-sectional view of a container closure is shown.

[0020] Figure 4 Is set in Figure 1 The edge of the container closure on the container opening of the IBC is shown Figure 1 Cross-sectional view along line IV-IV in FIG.

[0021] Figure 5 yes Figure 2 A bottom view of the sealing cap of the container closure is shown. DETAILED DESCRIPTION

[0022] Figure 1 A transport and storage container 10 is shown, which is also referred to as an IBC and has an inner container 13 arranged on a transport pallet 11 and accommodated in a cage 12, the inner container 13 being provided with a container fitting 14 at the front side and with a container opening 16 at the top, which can be closed with a container closure 15.

[0023] like Figures 2 to 4As shown, the container closure 15 has a cap 17, which in this case is a threaded top cap and is screwed to the opening edge of the container opening 16. A plug seat 19 is arranged in a first cover disk 18 of the cap 17, which penetrates the first cover disk 18 so that the opening edge 20 of the plug seat 19 protrudes from the top 21 of the first cover disk 18.

[0024] Especially if Figure 4 As shown, the plug insert 22 is screwed into the plug seat 19, and the plug insert 22 closes the plug seat 19. A sealing cap 23 is located on the top of the plug insert 22, and the sealing cap 23 includes a second cover disc 24 and an edge skirt 25, which is sleeve-shaped in the present case and extends substantially perpendicularly to the first cover disc 18, and the edge skirt 25 is connected to the second cover disc 24 via a first predetermined breaking means 27, and the first predetermined breaking means 27 has a predetermined breaking web 26, especially as Figure 2 shown.

[0025] Especially if Figure 3 As shown, the second cover plate 24 is provided with a fastening means 29 on its underside 28, which is a fastening ring in this case and engages with the insert recess 30 of the plug insert 22, so that the locking means 38 formed on the lower end of the fastening means 29 engages with the matching locking means 32 formed in the insert recess 30. Figure 3 As further shown, the second cover plate 24 is provided with a supporting means on its lower side 28 adjacent to the first predetermined breaking means 27 radially inwardly, the supporting means being an edge web 33, the lower edge 34 of which rests on the opening edge 20 of the plug seat 19 arranged on the top 21 of the cover 17.

[0026] Especially if Figure 4 As is clearly shown, the edge skirt 25 of the illustrated construction example is connected to the edge web 33 by means of first predetermined breaking means 27. Since the lower edge 34 is recessed relative to the lower edge 35 of the edge skirt 25, the edge skirt 25 covers the lower edge 34 of the edge web 33 which rests against the opening edge 20.

[0027] If Figure 4 , the corresponding load is introduced into the cover 17 by force fit via the edge web 33, which rests on the top 21 of the first cover disk 18 of the cover 17, more precisely on the opening edge 20 of the plug seat 19 in this case, without the edge skirt 25 being loaded and without the possibility of a reaction force due to the loading of the edge skirt 25 acting on the first predetermined breaking means 27. Therefore, the manipulation protection formed by the edge skirt 25 connected to the first cover disk 18 via the first predetermined breaking means 27 in this case is not affected by external loads acting on the second cover disk 24 of the sealing cap 23.

[0028] On the other hand, the sealing cap 23 is constructed such that the sealing cap 23 can be removed from the container closure 15 as a continuous unit, in particular after the first predetermined breaking means 27 have been broken, without the supporting means, in this case the edge web 33, preventing this removal. Figure 5 As shown, the pull tab 36 formed on the edge skirt 25 is connected to the locking means 38 formed on the fastening means 29 via the connecting means 37, and the connecting means 37 has a cover strip 39, which extends from the pull tab 36 via the edge skirt 25 and the edge web 33 into the central inner part 40 of the second cover disc 24, and is separated from the adjacent parts of the edge skirt 25, the edge web 33, and the inner part 40 of the second cover disc 24 by the lateral second predetermined breaking means 41 and the third predetermined breaking means 42. The cover strip 39 is connected to the locking means 38 of the fastening means 29 via the pulling web 43, so that when the pull tab 36 is moved obliquely upward toward the center of the cover disc, the cover strip 39 is separated along the second predetermined breaking means 41 and the third predetermined breaking means 42, and the locking means 38 formed on the fastening means 29 such as a fastening ring is deformed radially inwardly via the pulling web 43 connected to the inner part 40 of the second cover disc 24, with the result that the sealing cap 23 can be removed from the cover 17 as a continuous unit.

Claims

1. A container closure, comprising a sealing cap (23) made of an elastic plastic material, the container closure comprising a container seat base, wherein the container seat base is a cover (17) for forming a container opening (16) in a container wall, the cover (17) comprising a plug seat (19), the plug seat (19) being arranged in a first cover disc of the cover (17) and penetrating the first cover disc, the sealing cap (23) comprising a second cover disc and an edge skirt (25), the second cover disc having a fastening means (29), the fastening means (29) being arranged on the underside (28) of the second cover disc and being provided with a locking means (38) for forming a locking connection with a plug insert (22), the edge skirt (25) being arranged at the circumference of the second cover disc and being connected to the second cover disc via a first predetermined breaking means, It is characterized in that The second cover plate has a supporting means for supporting the second cover plate on the base of the container seat, the supporting means being arranged radially inwardly adjacent to the first predetermined breaking means on the lower side (28) of the second cover plate, wherein the supporting means rests on the top (21) of the first cover plate of the cover (17) and the edge skirt (25) is spaced apart from the top (21) of the first cover plate of the cover (17).

2. The container closure according to claim 1, It is characterized in that The plug seat (19) has an opening edge which protrudes from the top (21) of the cover (17), so that the supporting means rests on the opening edge (20) of the plug seat (19).

3. The container closure according to claim 2, It is characterized in that The supporting means is an edge web (33) formed on the underside (28) of the second cover disc and arranged concentrically with the edge skirt (25).

4. The container closure according to claim 3, It is characterized in that The edge web (33) has, relative to the underside (28) of the second cover disk, a lower edge which is recessed relative to the lower edge of the edge skirt (25).

5. The container closure according to claim 1, It is characterized in that The locking means (38) of the fastening means (29) is connected to a pull tab (36) arranged at the circumference of the second cover disc via a connecting means (37), the connecting means (37) having a cover strip (39), which is formed in the second cover disc and is separated from adjacent areas of the edge skirt (25), the edge web (33) and the inner part (40) of the second cover disc by lateral second and third predetermined breaking means and is connected to the locking means (38) via a pull web (43).

6. A container closure, comprising a sealing cap (23) made of an elastic plastic material, the container closure comprising a container seat base, wherein the container seat base is a wall of the container, the wall comprising a plug seat with a plug insert (22), the sealing cap (23) comprising a second cover disc and an edge skirt (25), the second cover disc having a fastening means (29), the fastening means (29) being arranged on the underside (28) of the second cover disc and being provided with a locking means (38) for forming a locking connection with the plug insert (22), the edge skirt (25) being arranged at the circumference of the second cover disc and being connected to the second cover disc via a first predetermined breaking means, It is characterized in that The second cover plate has a supporting means for supporting the second cover plate on the base of the container seat, the supporting means being arranged radially inwardly adjacent to the first predetermined breaking means on the lower side (28) of the second cover plate, wherein the supporting means rests on the wall surface of the container and the edge skirt is spaced apart from the wall surface of the container.

7. The container closure according to claim 6, It is characterized in that The supporting means is an edge web (33) formed on the underside (28) of the second cover disc and arranged concentrically with the edge skirt (25).

8. The container closure according to claim 7, It is characterized in that The edge web (33) has, relative to the underside (28) of the second cover disk, a lower edge which is recessed relative to the lower edge of the edge skirt (25).

9. The container closure according to claim 6, It is characterized in that The locking means (38) of the fastening means (29) is connected to a pull tab (36) arranged at the circumference of the second cover disc via a connecting means (37), the connecting means (37) having a cover strip (39), which is formed in the second cover disc and is separated from adjacent areas of the edge skirt (25), the edge web (33) and the inner part (40) of the second cover disc by lateral second and third predetermined breaking means and is connected to the locking means (38) via a pull web (43).

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