HK1245741B - Sealing cap for a container for holding a medical liquid - Google Patents

Description

The invention relates to a closure cap for a container for receiving a medical liquid according to the preamble of claim 1.

Such a closure cap comprises a cap body that defines an inner space and has at least one opening. At least one connection device is arranged on the cap body, to which a conveying device can be connected for supplying a medical liquid into the container or for removing a medical liquid from the container. The connection device includes a sealing element arranged on the cap body, which is positioned for sealingly closing the opening. On an outer side of the sealing element facing away from the inner space, a conveying device can be mounted for connecting the conveying device.

Such a support device can, for example, be designed as an injection syringe that is connected to the sealing element with an injection needle and can be introduced into the sealing element in an insertion direction, so that the sealing element is pierced by the injection needle. Such an injection syringe is particularly used for introducing a medical liquid into the container. On the other hand, for removing a medical liquid from the container, for example, an infusion set can be used, which is applied to the sealing element with a spike (also referred to as a dart), such that the sealing element is pierced by the spike, thus creating access to the container.

In a closure cap known from WO 2006/042579 A1, two connection devices are provided, each with a sealing element. One of these connection devices is used for supplying a medical liquid into a container connected to the closure cap, for example a bottle, while the other connection device is used for removing a medical liquid from the container.

In another closure cap known from WO 2010/066373 A1, three connection devices are provided, wherein a first one is used for introducing a medical liquid by means of an injection syringe, a second one for removing a medical liquid using an infusion set having a spike, and a third one for providing a so-called needle-free access. The sealing element of the third connection device has a slit opening which allows a conveying device, for example a syringe, to be connected to the sealing element via a needleless connector, thereby opening the sealing element and enabling the introduction of a liquid into the container in this way.

In a closure cap known from US2008011707 A1, according to the preamble of claim 1, a sealing element is provided which is convexly formed on the outer side.

Legal requirements may require wiping or dabbing the sealing element on its outer side before attaching a conveying device, such as an injection syringe for administering a medical fluid or an infusion set for withdrawing a medical fluid, in order to disinfect it.

The object of the present invention is to provide a closure cap in which the disinfection of an arranged sealing element is simplified.

This task is solved by an object having the features of claim 1. The inventive closure cap closes an access to a container. For example, the closure cap closes the opening in the neck of a bottle.

Accordingly, the sealing element is convexly formed on its outer side.

Here, the sealing element is positioned with its outer side facing outwardly toward the top side of the cap body.

Because the sealing element is convex on its outer side, it can be ensured that no disinfectant liquid remains on the sealing element after wiping or dabbing, but instead can be reliably and easily removed by wiping or dabbing. Since the sealing element protrudes outward with its outer side relative to a top surface of the cap body, it can be easily accessed by sliding a suitable disinfecting tool, such as a swab or a wipe, along the top surface, thereby enabling the outer side of the sealing element to be dabbed or wiped.

The outer side of the sealing element corresponds to the side of the sealing element that is visible from the outside and to which a conveying device, such as an injection syringe or an infusion set, or another conveying device, can be attached. The outer side is thus accessible from the outside to connect a conveying device to the closure cap. In one embodiment, the sealing element has a central thickness of 2 mm to 8 mm and/or an overall diameter of 4 mm to 14 mm.

The outwardly projecting outer side is part of a sealing head of the sealing element in another solution, extending through the opening. The sealing element is inserted into the opening with its sealing head and thus closes the opening, with the outer side formed on the sealing head facing outward and therefore away from the interior of the closure cap. In one embodiment, the sealing head has a diameter of 2 mm to 10 mm. Preferably, the central area of the sealing head, for providing the convex outer side, has a thickness 0.1 to 1 mm greater than the edge area of the sealing head. Preferably, the center of the convex outer side of the sealing element is located 0.1 to 1 mm, preferably 0.3 to 0.7 mm, above the upper outer edge of the sealing head of the sealing element. This improves access to the outer side of the sealing element.

In an initial state, the break-off piece is connected to the cap body in such a way that the sealing element is completely covered on the outside. The break-off piece encloses the outer side of the sealing element and thus closes it off on the outside, preventing dirt in the form of solid or liquid contaminants from reaching the outer side.

The break-off piece is integrally connected, i.e., in one piece, to the closure cap in the initial state. The closure cap can, for example, be produced together with the break-off piece as a plastic injection-molded part, for instance by means of plastic injection molding. The break-off piece is connected to the cap body via a break point in such a way that the break-off piece can be separated, in particular broken off, from the cap body along the break point in order to remove the break-off piece from the cap body.

The breakage line is arranged in a favorable configuration around the opening, so that the breaking piece is connected to the cap body along a connecting line running around the opening, and can be separated from the cap body along this connecting line, thereby releasing the sealing element and enabling a conveying device to be applied to the outer side of the sealing element.

In one embodiment, an inner space or area between the breaking piece and the outer side of the sealing element is sterilized. Thus, the outer side of the sealing element is already in a sterile condition when the breaking piece is still connected to the closure cap. In this case, disinfecting the outer side of the sealing element after removing the breaking piece and before attaching a conveying device, in particular by wiping or dabbing, is no longer necessary. However, if, for example, legal requirements make such disinfection necessary, this additional disinfection can be carried out more easily, in particular by means of the convex outer side of the sealing element.

The cap can, in a specific embodiment, for example, have a first connection device for removing a medical liquid and a second connection device for supplying a medical liquid. Thus, two connection devices are provided on the cap, one of which is particularly designed for removing a medical liquid, and the other of which is particularly designed for supplying a medical liquid.

The connection devices may be designed differently here in order to enable the connection of various conveying devices, for example, an injection syringe or an infusion set. However, it is also conceivable and possible to design the connection devices structurally in the same way and, in particular, to use identical sealing elements on the connection devices.

In a first variant, each connection device can have a sealing element, with the sealing elements of the connection devices being designed identically. Thus, identical sealing elements are used at the connection devices, and the connection devices can have structurally identical holding devices, for example, in the form of recesses provided on the closure cap for receiving the sealing elements. This simplifies the overall design of the closure cap, as identical parts can be used for manufacturing the connection devices.

For example, each sealing element in this variant can have a sealing head forming the outer side and a sealing body connected to the sealing head. The sealing body can be connected via a flange extending completely around a ring band, wherein a clamping connection with the closure cap is established via this ring band. For example, the ring band can be seated in a recess assigned to the closure cap and held there by clamping, so that the sealing element is connected to the closure cap via the ring band. Preferably, the sealing element is held by means of a flange.

To connect a delivery device, an injection needle or a protrusion of the delivery device can be applied to the outside of the sealing element in order to puncture it. In this process, the sealing element is displaced sideways, while the ring band remains on the associated holding device of the cap, thus keeping the sealing element in position on the cap. When the delivery device is removed from the cap again, the sealing element closes automatically, thereby sealing the opening of the cap against liquid penetration, particularly against leakage of liquid from the container. In a preferred embodiment, the sealing element is a resealable sealing element. Optionally, the sealing element, particularly the sealing element for connecting a protrusion, may be at least partially or continuously slotted.

In a second variant, the sealing elements of the connection devices can also be designed differently. A sealing element may, for example, be designed for attaching an injection syringe, while the other sealing element is particularly designed for attaching a stylet of an infusion set or the like. The sealing elements can thus be specifically adapted, for example, with regard to the thickness to be pierced, in order to enable a favorable connection of an injection syringe or an infusion set or the like.

The sealing element of the first connection device, which for example serves to remove a medical liquid using an infusion set, can be designed here as described above for the first variant, and in particular include a sealing head forming the outer surface, and a sealing body connected to the sealing head. The sealing body is connected via a flange extending completely around a ring band, and is held by a first holding device of the cap body via the ring band. Thus, a connection between the sealing element and the cap body is established via the ring band, so that the sealing element is held in position at the opening of the cap body via the ring band. The sealing body can be pierced by a mandrel of a conveying device, and when the mandrel is applied and inserted, the sealing body is displaced aside; however, the sealing element as a whole remains held in position on the cap body of the closure cap via the ring band.

The sealing element of the second connecting device may, in contrast, have a sealing head forming the outer side and a sealing body connected to the sealing head. The sealing body is not fixed to a holding device of the cap body via a circumferential ring band connected by a flange, but is instead held directly via a marginal section on a second holding device of the cap body. In this way, this second sealing element can be designed particularly for piercing using an injection needle. Because such an injection needle has a relatively small cross-section, less deformation occurs in the sealing element when inserting the injection needle compared to inserting a mandrel, for example, of an infusion set.

The sealing elements of the different connection devices can, in this variant, particularly differ in their thickness to adapt the connection devices to the different conveying devices. The second sealing element, which can serve for attaching an injection needle of an injection syringe, can particularly have a greater thickness than the first sealing element, which is, for example, adapted for attaching a cannula of an infusion set. Preferably, the first sealing element has a central thickness of 2 mm to 8 mm, preferably of 3 mm to 6 mm. Preferably, the second sealing element has a central thickness of 2 mm to 8 mm, preferably of 3 mm to 7 mm.

The sealing elements can have at least approximately rotationally symmetric shapes. For example, the sealing head and the sealing body can each be at least approximately cylindrical, wherein the outer side of the sealing head, which faces outward, is convexly shaped.

In one embodiment, the underside of the first and/or second sealing element, which provides the inner side, is essentially flat. In the first sealing element, the top side of the ring band is lower than the top side of the sealing head and/or the bottom side of the ring band is lower than the bottom side of the sealing body. Preferably, the first sealing element has a total diameter of 8 mm to 14 mm, preferably 10 mm to 12 mm. Preferably, the second sealing element has a total diameter of 4 mm to 11 mm, preferably 6 mm to 9 mm. In one embodiment, the sealing head of the first sealing element has a diameter of 4 mm to 10 mm, preferably 6 mm to 8 mm, and/or the sealing head of the second sealing element has a diameter of 2 mm to 8 mm, preferably 3 mm to 6 mm.

Furthermore, the invention also relates to a bottle comprising a closure cap according to the invention as described above. The bottle may, for example, be produced by SBM (Stretch-Blow-Moulding) or BFS (Blow-Fill-Seal). The bottle and the closure cap can be connected together, in particular by means of clamping, gluing and/or welding. Preferably, the bottle is filled with an infusion solution.

The idea underlying the invention will now be explained in more detail with reference to the embodiments illustrated in the figures. The figures show: Fig. 1A: A perspective view of a closure cap on a container (schematically illustrated); Fig. 1B: A partial cross-sectional view of the closure cap according to Fig. 1A; Fig. 1C: A side view of the arrangement according to Fig. 1B; Fig. 2A: A perspective view of the closure cap, with broken-off parts removed; Fig. 2B: A partial cross-sectional view of the closure cap according to Fig. 2A; Fig. 2C: A side view of the arrangement according to Fig. 2B; Fig. 3A: The view according to Fig. 2C, with a conveying device attached to a sealing element in the form of an injection syringe; Fig. 3B: The view according to Fig. 2C, with a conveying device attached to another sealing element in the form of an infusion set; Fig. 4A: A perspective view of a first sealing element; Fig. 4B: A side view of the sealing element; Fig. 4C: A partial cross-sectional view of the sealing element; Fig. 4D: A cross-sectional view through the sealing element; Fig. 5A: A perspective view of a second sealing element; Fig. 5B: A side view of the sealing element; Fig. 5C: A partial cross-sectional view of the sealing element; Fig. 5D: A cross-sectional view through the sealing element; Fig. 6A: A perspective view of a second embodiment of a closure cap; Fig. 6B: A partial cross-sectional view of the closure cap according to Fig. 6A; Fig. 6C: A side view of the arrangement according to Fig. 6B; Fig. 7A: A perspective view of the closure cap according to Fig. 6A, with broken-off parts removed; Fig. 7B: A partial cross-sectional view of the arrangement according to Fig. 7A; and Fig. 7C: A side view of the arrangement according to Fig. 7B.

Fig. 1A-1C to Fig. 5A-5D show a first embodiment of a closure cap 2 that can be attached to a container 1, particularly in the form of a bottle, for example a plastic bottle or a glass bottle, in order to close the container 1 on the outside and provide access for filling or removing a medical liquid.

The closure cap 2 is attached to a container body 10 of the container 1 and connected in a sealing manner to the container body 10, for example by welding or gluing.

The closure cap 2 has a cap body 20 which on its top side 21 is provided with two connection devices 3, 4 for connecting different conveying devices 5, 6 (see FIGS. 3A and 3B). The connection devices 3, 4 each have a sealing element 31, 41 which is received in a retaining device 32, 42 in the form of a positively locking receptacle on the cap body 20 and is clamped to the retaining device 32, 42. In particular, the retaining devices 32 and 42 are each formed as a single, preferably annular, flange. The sealing elements 31, 41 serve to close openings 321, 421 on the top side 21 of the cap body 20 towards the outside, wherein in each case a sealing head 310, 410 of the sealing element 31, 41 projects into the associated opening 321, 421 and closes it in a sealing manner. The sealing elements 31, 41 are initially inserted into the openings 321, 421 when the retaining devices 32 and 42 are not bent. To fix the sealing elements 31 and 42, the retaining devices 32 and 42 are then bent, as shown, for example, in FIG. 1C.

The connecting devices 3, 4 are in an initial state, as shown in Figs. 1A-1C, each covered by a break-off piece 30, 40 and sealed outwardly in such a way that the openings 321, 421 with the sealing elements 31, 41 arranged therein are not accessible from the outside and protected against contamination. Preferably, the interior space formed by the break-off pieces 30, 40 is sterile.

A first connection device 3 is used for removing a medical liquid from the container 1. Another, second connection device 4, on the other hand, is used for supplying a medical liquid into the container 1. The removal of a medical liquid is performed via a conveying device 6, as shown in Fig. 3B, in the form of, for example, a withdrawal device formed by an infusion set, which has a spike 61 with a relatively large cross-section and can be applied to the sealing element 31 of the associated connection device 3. The supply of a medical liquid, in contrast, is carried out via a conveying device 5 in the form of a syringe, illustrated in Fig. 3A, which can be applied to the sealing element 41 of the associated second connection device 4 with an injection needle 51 in order to puncture the sealing element 41.

Because the protrusion 61 of the withdrawal device 6 has a relatively large cross section, the associated opening 321 of the connection device 3 is also relatively large. Consequently, the sealing element 31, which is rotationally symmetrical in its basic form, has a sealing head 310 with a relatively large diameter. Preferably, the sealing head 310 of the first sealing element 31 has a diameter preferably between 5 mm and 9 mm, and/or the sealing head 410 of the second sealing element 41 has a diameter between 3 mm and 6 mm.

In contrast, the opening 421 of the other, second connecting device 4 is smaller, and accordingly, the sealing head 410 extending into the opening of the second sealing element 41 has a relatively small diameter.

Detailed, separate illustrations of the sealing elements 31, 41 are shown in Figs. 4A-4D and 5A-5D.

The first sealing element 31 has a sealing head 310 with an outwardly facing, convex outer side 311. A sealing body 312 is attached to the sealing head 310, at the rear of the outer side 311. The sealing body 312 is connected via a circumferential flange 313 to a ring band 314 that also extends around completely. The sealing element 31 is inserted into an opening 320 of the holding device 32 via the ring band 314 and is clamped onto the holding device 32. A lower side 315 of the sealing element 31 extends into an inner space 20 of the closure cap 2 (see, for example, FIG. 3A). The lower side 31 of the first sealing element 31 is essentially flat here. In the first sealing element 31, the upper side of the ring band 314 is located lower than the outer or upper side 311 of the sealing head 310. Moreover, the lower side of the ring band 314 is located lower than the inner or lower side 315 of the first sealing body 31. Therefore, the ring band 314 extends beyond the lower side 315.

The other, second sealing element 41 also has a rotationally symmetrical shape and consists of a sealing head 410, to the rear of which a cylindrical sealing body 412 is attached, which has a convex curved outer side 411. This cylindrical sealing body 412 is directly fixed in an opening 420 of the associated second holding device 42, by means of a marginal section 413 of the sealing element 41 being clamped in the opening 420 of the holding device 42. A bottom side 414 of the sealing element 41 faces toward the interior space 200 of the closure cap 2. The bottom side 414 of the second sealing element 41 is essentially flat here.

The maximum thickness of the first sealing element 31, measured between the outer side 311 and inner side 315, along a fitting direction A in which a conveying device 5, 6 is to be attached to a respective assigned sealing element 31, 41 (see FIGS. 3A and 3B), is smaller than the maximum thickness of the other, second sealing element 41, again measured between the outer side 411 and inner side 414. The different design in diameter and thickness is caused by the fact that when inserting a mandrel 61, as shown in FIG. 3B, the assigned first sealing element 31 must be displaced to a much greater extent than when attaching an injection needle 51 to the assigned second sealing element 41. Thus, the first sealing element 31 can be pierced and displaced in a favorable manner when inserting a mandrel. The same applies to the second sealing element 41 when attaching an injection needle 51.

Both sealing elements 31, 41 automatically close again when the respective conveying device 5, 6 is removed from the connection device 3, 4.

Because the sealing elements 31, 41 are convexly curved on their outer sides 311, 411 and additionally project outwardly from the top surface 21 of the cap body 20, the sealing elements 31, 41 can be conveniently wiped or dabbed for disinfection purposes, as may be required by legal regulations. In particular, due to the shaping of the sealing elements 31, 41 on their outer sides 311, 411, it is ensured that the outer sides 311, 411 can be reached by a suitable disinfecting tool, for example a swab or a cloth, and additionally, due to the convex curvature, it is ensured that after dabbing or wiping, no disinfectant liquid or other residues remain on the outer side 311, 411, but rather the sealing elements 31, 41 can be conveniently wiped. Preferably, the central area of the sealing head 310 has a thickness greater by 0.1 to 1 mm than the edge area of the sealing head 310. The center of the convex area (see Figures 4B and 5B) lies 0.1 to 1 mm, preferably 0.3 mm to 0.7 mm, above the outer edge.

In principle, the following procedure is used to connect a support device 5, 6 to an assigned connection device 3, 4.

In an initial state, the closure cap 2 connected to container 1 is provided with breakaway pieces 30, 40 fixedly arranged thereon. The breakaway pieces 30, 40 are formed integrally with the cap body 20 and connected to the cap body 20 via circumferential breaking points 300, 400 in such a way that the outer sides 311, 411 of the sealing elements 31, 41 are covered outwardly.

If a conveying device 5, 6 is to be attached to an assigned connection device 3, 4, the respective breaking piece 30, 40 is removed from the cap body 20 by a user grasping the breaking piece 30, 40 between his fingers and breaking it off from the cap body 20 along the break line 300, 400. In this way, the respective sealing element 31, 41 is exposed, allowing the conveying device 5, 6 to be attached to the outer side 311, 411 of the sealing element 31, 41 (see FIGS. 2A to 2C).

Using a suitable piercing tool, the sealing element 31, 41 is now pierced, thereby creating a flow connection between a body 50, 60 of the respective conveying device 5, 6 and the interior of the container 1, so that a medical liquid can be filled into the container 1 or removed from the container 1.

The closure cap 2 can preferably be made of plastic, for example by means of plastic injection molding, with its cap body 20. The breaking pieces 30, 40 of the connection devices 3, 4 are first formed in one piece with the cap body and can be broken off from the cap body 20 to access one of the sealing elements 31, 41.

While the cap body 20 is made from a relatively rigid plastic material, the sealing elements 31, 41 are made from a relatively soft, elastic material, such as polyisoprene or a thermoplastic elastomer.

In an embodiment of a closure cap 2 shown in Figs. 6A-6C and 7A-7C, the connection devices 3, 4 have identical sealing elements 31, 41 arranged in mutually compatible holding devices 32, 42. The shape of the sealing elements 31, 41 corresponds to the embodiment shown in Figs. 4A-4D.

Again, a connection device 3 is used to remove a medical liquid from a container 1 connected to the closure cap 2, while the other connection device 4 is used for filling a medical liquid.

In this case, a conveying device 5 in the form of an injection syringe with an injection needle or a conveying device with a plunger can be used both for removal and for filling.

Otherwise, the embodiment is identical to the previously described embodiment as shown in Figs. 6A-6C and 7A-7C, so reference is made to the above descriptions.

The idea underlying the invention is not limited to the aforementioned embodiments, but can generally also be implemented in entirely different forms.

By virtue of the outer side of the sealing elements being convexly shaped and projecting outward from the front side of the cap body of the closure cap (when the break-off parts of the connection devices are removed), the sealing elements can be wiped or dabbed on their outer sides in a simple and effective manner for disinfection purposes.

In principle, a cap can also have only one connection device with a sealing element or more than two connection devices each having a sealing element.

Similarly, it is generally conceivable that only one sealing element among several sealing elements of various connection directions is formed with a convex curvature on its outer side.

Reference list

1 Container 10 Container body 2 Cover cap 20 Cap body 200 Inner space 21 Top side 3 Connection device 30 Break-off piece 300 Fracture line 31 Sealing element 310 Sealing head 311 Outer side 312 Sealing body 313 Flange 314 Ring band 315 Inner side 32 Holding device 320 Opening 321 Opening 4 Connection device 40 Break-off piece 400 Fracture line 41 Sealing element 410 Sealing head 411 Outer side 412 Sealing body 413 Edge section 414 Inner side 42 Holding device 420 Opening 421 Opening 5 Injection device 50 Body 51 Injection needle 6 Withdrawal device 60 Body 61 Plug A Direction of engagement

Claims (12)

1. Sealing cap (2) for a container (1) for holding a medical liquid, comprising

   - a cap body (20), which delimits an interior space (200) and comprises at least one opening (321, 421), and

   - at least one connecting device (3, 4) which is arranged on the cap body (20) and to which is connectible a conveying device (5, 6) for delivering a medical liquid into the container (1) or for removing a medical liquid from the container (1), wherein the connecting device (3, 4) comprises a sealing element (31, 41) which is arranged on the cap body (20) and which is arranged at the opening (321, 421) in order to close it in a sealing manner and which comprises an outer side (311, 411), which faces away from the interior space (200) and to which is attachable the conveying device (5, 6), in order to connect the conveying device (5, 6) in an attachment direction (A),

   - wherein the sealing element (31, 41) is designed to be convex on the outer side (311, 411),

   - wherein the at least one connecting device (3, 4) comprises a break-off piece (30, 40), which is firmly connected in an initial state to the cap body (20) and covers the outer side (311, 411) of the sealing element (31, 41) toward the outside and

   - the break-off piece (30, 40) is connected via a predetermined breaking point (300, 400) to the cap body (20) such that the break-off piece (30, 40) is detachable from the cap body (20) along the predetermined breaking point (300, 400),

   characterised in that the sealing element (31, 41) with its outer side (311, 411) protrudes beyond a top side (21) of the cap body (20) toward the outside and/or that a sealing head (310, 410) of the sealing element (31, 41) extends through the opening (321, 421) and forms the outer side (311, 411) protruding beyond a top side of the cap body toward the outside.
2. Sealing cap (2) according to claim 1, characterised in that an interior space is provided in a sterile manner between the break-off piece (30, 40) and the outer side (311, 411) of the sealing element (31, 41).
3. Sealing cap (2) according to one of claims 1 to 2, characterised in that a centre of the convex outer side (311, 411) of the sealing element (31, 41) is located 0.1 to 1 mm, preferably 0.3 mm to 0.7 mm, above an outer upper edge of a sealing head (310, 410) of the sealing element (31, 41).
4. Sealing cap (2) according to one of the preceding claims, characterised in that the predetermined breaking point (300, 400) extends around the opening (321, 421).
5. Sealing cap (2) according to one of the preceding claims, characterised in that the sealing cap (2) comprises a first connecting device (3) for removing a medical liquid and a second connecting device (4) for delivering a medical liquid.
6. Sealing cap (2) according to claim 5, characterised in that each connecting device (3, 4) comprises a sealing element (31, 41), wherein the sealing elements (31, 41) are designed to be identical.
7. Sealing cap (2) according to claim 6, characterised in that each sealing element (31, 41) comprises a sealing head (310, 410) forming the outer side (311, 411) and a sealing body (312, 412) connected to the sealing head (310, 410), wherein the sealing body (312, 412) is held on a holding device (32, 42) of the cap body (20) via a ring collar (314) extending around the attachment direction (A) and connected to the sealing body (312) via a flange (313).
8. Sealing cap (2) according to claim 5, characterised in that each connecting device (3, 4) comprises a sealing element (31, 41), wherein the sealing elements (31, 41) are designed to be different.
9. Sealing cap (2) according to claim 8, characterised in that the sealing element (31) of the first connecting device (3) comprises a sealing head (310) forming the outer side (311) and a sealing body (312) connected to the sealing head (310), wherein the sealing body (312) is held on a first holding device (32) of the cap body (20) via a ring collar (314) extending around the attachment direction (A) and connected to the sealing body (312) via a flange (313).
10. Sealing cap (2) according to claim 8 or 9, characterised in that the sealing element (41) of the second connecting device (4) comprises a sealing head (410) forming the outer side (411) and a sealing body (412) connected to the sealing head (410), wherein the sealing body (412) is held on a second holding device (42) of the cap body (20) via an edge section (413) extending around the attachment direction (A).
11. Sealing cap (2) according to one of claims 8 to 10, characterised in that when viewed along the attachment direction (A), the sealing elements (31, 41) have a different thickness that is to be pierced by the conveying device (5, 6).
12. Bottle, preferably filled with an infusion solution, comprising a sealing cap according to one of the preceding claims 1 to 11.