DE10138191A1 - Cap for infusion or transfusion bottles - Google Patents

Abstract

The invention relates to a closure cap (V) for infusion or transfusion bottles, with a rubber-like sealing part (1) which is adapted to the bottle neck (3), the closure cap (7) on the underside of the bottle neck (3 ) is formed and an overcap (8) is also provided for the form-fitting mounting of the closure cap (7) on the bottle neck (3) and, in order to achieve an advantageous design that is accessible with regard to sterilization, for example, suggests that the sealing part (1) on the closure cap (7) it is caught that the sealing part (1) is exposed to the outside of the closure cap (7) in a piercing area (17) and that the overlap (8) also covering the piercing area (17) is in a first, reversible latching position (I) can be held at an axial distance (y) from the piercing area (17) on the closure cap (7).

Description

The invention relates to a closure cap for infusion or Transfusion bottles, with a rubber-like adapted to the bottle neck Sealing part, wherein the closure cap under one bead Undergrip is formed on the bottle neck and furthermore an overcap is provided for positive locking of the cap on Bottleneck.

From DE-PS 37 15 175 C1 it is known that designed to a plug Sealing part by a cap in the form of the classic metal Secure the crimp cap. One left in the ceiling of this cap Opening allows access for a cannula or transfusion set. in the This opening is kept closed with the help of an original condition at the same time, a plastic lid forming a germ barrier as an overcap. This Plastic lid can be removed with emphasis. It is a relief Target tear lines, which are caused by weakening the material thickness of the Plastic lid are realized.

In substitution of the device-dependent crimp exists from the DE 40 15 510 A1 the proposal that captivates the sealing part To hold the cap in the bead and the bottle neck underpinning grip by an overcap in the form of a Secure form-fit bracket. The overcap acts like a ripe. It is as Ring slide realized, which extends over the cover cap ceiling can be shifted downwards.

Knowing these requirements, the invention has set itself the task of a generic closure with a view to obtaining a training advantageous assembly as well as accessible treatment unit.

This task is first and foremost with a closure with the Features of claim 1 solved, it being based on the fact that Sealing part is caught on the cap that the sealing part to The outside of the cap is exposed in a piercing area and that the overcap that also overlaps the piercing area in a first, reversible locking position with an axial distance to the piercing area on the Locking cap can be held.

As a result of such a configuration, a generic closure is increased Achieved use value: This lies in the creation of an assembly unit justifies this both with regard to the cohesion of the closure-forming parts as well as with regard to a defined pre-engagement while maintaining the distance described between the closure cap and the overcap. The gives space for measures regarding sterilization of the Closure. The overflowing displacement of the overcap around the remaining stroke leads to a defined positive locking bracket of the cap on Bottleneck. The sealing part is also mechanically sufficient in strength Carrier, namely the cap, assigned or caught on. Here, too, the outer, freely presenting surfaces are ideal for the mentioned treatment accessible. This also applies to the bottom of everything overlapping overcap. The reversible that defines the distance The rest position has a response threshold, as it were, that the further assembly stroke the cap only releases when the undercutting under the Cap on the bottle neck has taken place. An abutment is built on. As already indicated, the wall lowers like a locking bolt the anchor zone of the cap.

The subjects of the further claims are below in relation to that The subject of claim 1 explains, but can also in their independent wording is important. It is intended that the Sealing cap and the sealing part in a two-component spraying process are made. The adhesive force to be gained or set from this was as found sufficient; anyway are the usual mechanical Stresses, e.g. in the context of the sterilization explained above, during transportation, the passage of the filling paths, the hike in sorting routes etc. not trennausreichend. On the other hand, the assignment can also be such that there is a will to solve, for example to separate them according to type. The is preferred Closure cap over the relatively soft, preformed sealing part injection molded. This leads to an effect of even independent importance: It namely comes that the sealing part due to shrinkage elastic pre-tension against the cap. On the one hand, that applies with regard to the cap bottom forming as well as in terms of perforated piercing areas, which are within the scope of the Total shrinkage is also slightly narrow. This also leads to one welcome clasp to the relevant section of the Sealing part. The invention further proposes that the Cap in the circumferential direction formed like a segment of a circle, with a Has snap-in undergrip tongues, the outside Locking shapes for locking the corresponding on a cylinder wall Have locking projections possessing overcap. Regarding the sub-tongues are single tongues. They are springy evasive. In terms of the locking formations and corresponding locking projections is on a zigzag to sawtooth-shaped structure. The invention brings further in suggestion that the cylinder wall of the overcap to snap over the Closure cap at its lower, free end over the locking projections the cylinder wall has protruding locking lug. It brings one there Thickening of the cap edge and so a stable back support for the second, basically irreversible locking position of the closure. Then is further provided that the closure cap, assigned a Cover cap cover, has a snap-in shape for reversible locking with the Latch of the overcap. The formation of the detent formation, assigned to the Cover cap cover, creates one with respect to the pre-assembled unit greatest possible free space for sterilization. It is concrete Snap-in shape in a cross-section below the cover cap ceiling arranged, d. H. close to the ceiling. The overcap has a piercing area overlapping overcap cover. The one required when using Accessibility of the piercing area is achieved with simple means that in the top cap ceiling by a line of weakness one to The pull tab is formed on the outer edge of the overcap cover is. The peripheral gripping attachment generally has a separation point here, in advantageously forming the access for the interior which is in pre-latching located unit. Two diametrically opposed, each reaching up to a central area of the top cap ceiling Pull tabs formed. It is also proposed that a Tear-open tab each peripherally through the cover cap ceiling Piercing area is assigned. The piercing areas are so to speak arranged island-like in the ceiling field. It is also envisaged that the Overcap on the cap is secured against rotation. To form the Locking features can be included from the outset become. This is substantiated by the fact that the anti-rotation device is blocked by the Cylinder wall of the overcap formed on the inside formed vertical ribs, which engage in corresponding vertical grooves in the sealing cap. In terms of the vertical grooves are the indicated specifications. The related embodiment is characterized in that a vertical groove the cap through the separation area between two circular segment-like under-tongues is formed. There is also an advantageous one Design in that the vertical groove to the top of the Cap ceiling continues, leaving a residue of the wall Cap. The remainder results by a weak truncated cone-shaped transition of the wall of the Closure cap towards the closure cap ceiling. An advantageous variant of the Finally, the subject of the invention is that the sealing element with a radial distance to the inside of the ring wall of the closure cap ends. Such a peripheral, circumferential annular gap can be easy to consider in terms of production technology. The contact-free there Assignment to the inside is applicable if the clamping voltage explained in this area should not be applied and minimizing the mutual adhesive surfaces is wanted. You can also use the to the ceiling The radial distance of the sealing cap is good for levering out the Use the sealing part for the separate separation. The sealing part can be like pry an oyster out of the shell.

The object of the invention is based on a drawing illustrated embodiment explained in more detail. It shows:

Fig. 1 shows the closure according to the invention, associated with a bottle neck, in enlarged representation, namely in half-section,

Fig. 2 shows the associated closure in a perspective view;

However, Fig. 3 is a view like Fig. 2, broken

Fig. 4 detached tear tabs of the closure, one of which, in longitudinal section, again in a perspective view,

Fig belonging overcap isolated. 5 and disrupted,

Fig. 6, the right end cap, also broken,

Fig. 7, the sealing part as a preform,

Fig, each also broken. 8 the bottle neck of a transfusion bottle,

Fig. 9, the pre-assembled unit of the closure cap at an axial distance assignment, again broken away,

Fig. 10 shows the assignment meet aligned bottle neck,

Fig. 11 closure and bottle in composite plug, still unsecured,

Fig. 12 is the same in the plug composite, now secured by the displaced into its final position over-cap,

Fig. 13 is a variant of the closure with centrally lying piercing region in position of FIG. 12, but not at Pictured the bottle neck,

Fig. 14, the closure cap with an associated sealing member, illustratively the design of the cap-side means of rotation, formed from the inherently existing longitudinal slots and the closure-cap close to the ceiling accreting vertical grooves, and

Fig. 15 shows a further variant of the closure in view as FIG. 1.

The non-metallic closure V shown consists of a nested double cap with a sealing part 1 held therein.

The sealing part 1 consists of thermoplastic rubber (TPE) and is basically disk-shaped. Its edge 2 is thickened against a bottle neck 3 .

A bottle 4 that can be used as an infusion or transfusion bottle consists of glass. The free end of the bottle neck 3 widens radially outward into a bead 5 . This provides an undercut flank 6 . This is used for underpinning by the actual closure cap 7 of the closure V. The overcap overlapping it ( 7 ) bears the reference number 8 .

The end face 9 widened by the bead 5 is designed in a rotationally symmetrical sloping roof-like manner. The longer flank of the sloping roof slopes outwards. The gable is convexly rounded with a connection to the mouth 10 of the bottle neck 3, a shorter, steeply falling flank.

The underside of the sealing part 1 facing the mouth 10 is recessed flat. The depression bears the reference number 11 .

The sealing cap 7 , made of tough-hard plastic (PP), is, like the overcap 8 of the same material, cup-shaped. The former is a shell part surrounding the sealing part 1 on the outside, consisting of a cover cap cover 12 that is essentially flat in the center. It merges into an annular wall 13 . Ceiling 12 and ring wall 13 adjoin each other at an angle of over 90 °; in relation to the corner as a vertex, this angle includes approx. 110 °. For the shell-forming approach of the ring wall 13, this results in a slightly frustoconical alignment and, with respect to the part on the ceiling, a slightly sloping edge (see FIG. 1). The approach is marked with a and the part with b. They are of the same leg length.

The ring wall 13 continues towards its free, lower end in lower gripping tongues 14 . Following the circumferential direction of the sealing cap 7 , it is a ring of individual tongues which can be rebounded in the manner of a segment of a circle and have excellent restoring force. The curve also has a stabilizing effect. The gripping means is specifically a latching bead 15 of the same shape and exposed on the bottle neck side. This latching beads 15 snap anchoring under the undercut flank 6 of the bottle neck 3 . The flanks of parts 6 and 15 are coordinated. They extend approximately at an angle of approx. 40 ° outwards to a horizontal.

The separating areas that freely cut the individual gripping tongues 14 are realized as longitudinal slots 16 of the ring wall 13 . The slot base 16 of the longitudinal slots 16 is approximately level with the exposed ridge of the end face 9 of the bottle neck 3 .

The cover cap cover 12 leaves areas which can be pierced. According to one version, the corresponding piercing area 17 lies in the center of the closure V, in the form of a circular hole 18 , the radius point of which intersects the longitudinal central axis xx of the closure V, which is basically rotationally symmetrical.

The central piercing area is embodied in the version shown from FIG. 9. Otherwise, the structure is identical to the basic version, starting with Fig. 1. The reference numerals are used analogously, sometimes without repeating textiles.

The basic version provides, as can be clearly seen in FIG. 6, two such piercing areas 17 in the cap top 12 .

The sealing part 1 projects with a cavity-filling portion of rubber-like substance into the respective hole 18 circumscribing the piercing area 17 .

The hole 18 can, however, also be closed by a correspondingly filling projection protruding from the bottom or inside of the ceiling 19 of the overcap 8 into the opening or the hole 18, filling the cavity. In this case, the sealing part 1 does not have the disk-like filling bodies 20 arranged on its outside.

It is preferred in terms of production that the sealing part 1 is caught on the sealing cap 7 , the sealing part 1 being exposed to the outside of the sealing cap 7 in the circumference of the piercing area 17 . Exposed means or includes, leaving a practicable pierceability, so that a cuticle remaining on the top is still to be understood functionally under this term.

Sealing cap 7 and sealing part 1 are produced in a two-component injection molding process. The prefabricated, relatively softer injection molded sealing part 1 is introduced with a shape into the injection / casting mold and overmoulded with the relatively harder material that results in the closure cap 7 . This results in the aforementioned catching of the parts 1 , 7 against one another, the adhesion of the masses to one another being adjusted such that the sealing part 1 can be released without adhering to the self-supporting hard body, that is to say the closure cap 7 .

In such a manufacturing process, the surprising effect of a mechanical cohesion of the parts 1 , 7 also occurs due to the shrinkage of the pot-forming material or part applied to the sealing part 1 , so that the closure cap 7 is under elastic prestress against the sealing part 1 or vice versa. Thus, the outer edges of the disk-shaped sealing part 1 are edge-clamped by the shell-forming region of the ring wall 13 , that is to say the attachment a. The same applies with regard to the easily contracted holes 18 , which bind the filler body (s) 20 in a peripheral clamping manner.

The sealing cap 7 thus equipped with the sealing part is combined with the overcap 8 by prepositioning (see FIG. 9).

In this position, the overcap 8 is assigned to the closure cap 7 astride and in a box-appropriate manner. This docking position is defined by a first, reversible latching position with an axial distance y remaining between the inside of the cover 19 of the overcap 8 and the upper side of the cover cap cover 12 which has the piercing areas 17 . This first, reversible locking position is indicated by I in the drawing.

A so-assembled unit 1/7/8 is immune to traditional mechanical loads, this pre-assembled unit that can handle, sort, and especially if necessary carry out the usual sterilization procedures. There is an external and internal accessibility in the largest possible area, since on the one hand the parts 7 and 8 are not yet nested and, moreover, leave the space at a distance y accessible via the openings 21 left in the area of the cap cap 12 under tear-off tabs 22 .

The distance y defined by detenting clearly shows the lower gripping tongues 14 to be free-standing and fully reboundable. The closure V is placed on the bottle neck 3 . As a result of the assignment pressure from above, the resilient gripping tongues 14 overlap the bead 5 of the bottle neck 3 , which has a larger cross section, until finally the locking beads 15 undercut the undercut surface 6 . The latching force holding the parts 7 and 8 at a distance y is set with respect to an insurmountable threshold in such a way that the overcap 8 on the jacket wall of the closure cap 7 only continues to overflow after the described anchoring.

In terms of construction, the first, reversible latching position I is such that the closure cap 7 has a latching configuration 23 . It is preferably located as a circumferential groove on the outside of the ring wall 13 , namely lying close to the cover cap ceiling 12 , more precisely through below a cross-sectional plane of the closure V occupied by the cover 12. The corresponding counter-locking means provides a locking lug 24 on the inside of a cylinder wall 25 of the cup-shaped overcap 8 .

When the parts 7 and 8 are nested (see, for example, FIG. 1), the latch 24 snaps under an inclined locking flank 26 in the back of the latching bead 15 . In this position, the cylinder wall 23 surrounds the ring of undergrip tongues 14 in a rip-like manner, which thus securely holds the closure V on the bottle neck 3 of the infusion or transfusion bottle. This irreversible locking position secured by the body 8 which practically provides a slide ring is designated II. It looks like a flare, only without the means of plastic deformation.

The outside of the ring wall 13 and the inside of the cylinder wall 25 are roughened from the slot base 16 'of the longitudinal slots 16 to the locking lug 24 . It is an orderly, form-fitting roughening in the form of a horizontally oriented tooth structure. Specifically, this looks in detail in terms of construction in such a way that the closure cap 7 has outside detent shapes 27 in the form of depressions in the circumferential direction of the lower gripping tongues 14 designed in the manner of a segment of a circle. In the engage on the inside of the cylinder wall 25 formed locking projections 28 in the form of ribs. The washboard-like contour can be seen in detail in the drawings. The locking projections 28 have a lower radially oriented standing height than the locking lugs 24 .

Coming back to the tear-off tab or tear-off tabs 22 in the overcap cover 19, it remains to be stated that these are tongue-shaped in outline. The desired separation tear is favored by a line of weakness 29 . It is a notch-valley-like trench guide on the top, with the trench bottom leaving a fraction as a material bridge. In the area of the peripheral openings 21 , even this area is broken, so that the marking can be carried out more easily. A freely projecting end zone of the tear-off tabs 22 also has a favorable effect in this regard. The cantilever need not go beyond the general diameter of the overcap 8 if, as shown, the jacket wall thereof is flattened in this end region. The corresponding sub-groove has the reference symbol 30 .

In the basic version two diametrically opposed tear tabs 22 can be seen. The ends round off in the opposite direction in front of a central region of the overcap cover 19 . The procedure is such that a tear-open tab 22 is assigned to a piercing area 17 which is peripherally surrounded by the cover cap cover 12 .

In order to achieve a congruent alignment of the piercing area 17 and the tear-open tab 22 during assembly, the overcap 8 is held in a rotationally secured manner on the closure cap 7 , which of course does not require such a measure in the case of a centrally located piercing area 17 of the closure V and a diametrically continuous tear-open tab 22 .

The rotation lock is achieved by a vertical rib 31 formed on the inside of the cylinder wall 25 of the overcap 8 . It projects beyond the height of the locking projections 28 and extends into the cross-sectional area of the ring wall 13 of the closure cap, more precisely into the cross-sectional area of the longitudinal slots 16 .

Two axially oriented vertical ribs 31 , which are formed diametrically opposite one another, are expediently formed.

As a result of the conical shell-forming part of the annular wall 13 , which is therefore not slotted through 16, the longitudinal slot 16 in this area occupied by the projection a is further drawn as a vertical groove 32 which is open to the outside. Since this section, as explained above, tapers in the shape of a truncated cone towards the top of the closure V, this shell wall is retained, albeit in a smaller cross section. The corresponding structural provision that the vertical grooves 32 on the closure cap 7 is formed by the separation area between two adjacent circular segment-like gripping tongues 14 can be seen in the drawing. It is particularly clear from FIG. 14 that the vertical groove 32 continues up to the upper side of the cover cap cover 12 , leaving a residue 33 of the ring wall 13 of the cover cap 7 indicated there.

There are a total of / into account eight equiangularly distributed locking engagement spaces 16 32, two of which are diametrically opposite one another occupied by vertical ribs 31st

The spatial assignment of the holes 18 to the locking engagement spaces is such that the desired full coverage of the holes 18 is given by the tear-off tabs 32 that overlap them.

The correct plug alignment can be practically felt by a slight rotary movement of the overcap 8 towards the closure cap 7 . On the other hand, however, the blocking engagement spaces not used 16/32 can be locked on the input side. In the case of a centrally located hole 19, however , such a precaution is not necessary.

In the case of an injection of the substance forming the sealing part 1 into an already formed closure cap 7 , the spreading of the TPE mass can go through the hole or holes 18 . However, Fig. 14 shows a specification to the effect that the injection is effected via one of two opposed close to the edge, special holes 34, the other acts as a vent. The holes 34 placed in a diametral of the closure cap top 12 have only a fraction of the clear diameter of the holes 18 forming the filler 20 . The ratio is 1: 6. Holes 18 and 34 are circular. They can be cylindrical, frustoconical or undercut.

The further variant of the closure V shown in FIG. 15 largely corresponds structurally to the basic version described in detail. The reference numerals are used analogously, partly without repeating the text of the variant readable on the basic version.

The different configuration consists in that the essentially disk-shaped sealing element 1 now ends peripherally with a radial distance z from the inside of the ring wall 13 of the closure cap 7 . The essentially cylindrical edge 35 of the sealing element 1 is in contact-free manner in front of the inner side 36 of the ring wall 13 circumscribing it. The fully circumferential annular gap thus formed bears the reference number 37 . In the basic version, however, the annular gap 37 is only rudimentary. It extends only over a fraction of the shell-forming, vertical length of the ring wall 13 , to be precise shortly behind the longitudinal slot base 16 '.

On account of the part a of the ring wall 13 which tapers slightly tapered towards the cover cap ceiling 12 , the said annular gap 37 tapers towards the ceiling-side gap base. This gap base is provided in part by the other part of the closure cap 7 , designated by b. The bottom of the slot is recognizable as a non-contact zone between the sealing part 1 and the ring wall 13 or ceiling 12 .

The annular gap 37 can be used in the sense that it forms a clamping clamping lock between the sealing part 1 and the closure cap 7 . The annular gap 37 is dimensioned in the radial direction such that it does not clog after the shrinkage process described. This leaves an access for attaching a removal tool, for example in the sense of a desired separation of the parts forming the closure V.

On the other hand, there is also a certain radially inward deflection clearance with regard to the latching shape 23 of the closure cap 7 .

With regard to the piercing area 17 , the means are applied as explained above. If, in a modification of the piercing area described, the hole 18 is not to be occupied by a filler 20 of the sealing part 1 , in return, the procedure can be such that a corresponding projection starts from the overcap cover 19 or, as shown, from the underside of the tear-off tab 22 that occupies the hole. Such a projection can of course be cylindrical or frustoconical. In the latter case, the hole 18 is then designed to be adapted, ie funnel-shaped. In the back of the protrusion provided by the overcap 8 , this can have an indentation from the top.

The correct hole finding is ensured in any case by the described angle-defining means, such as vertical rib 31 and vertical groove 32 .

All of the features disclosed are (in themselves) essential to the invention. In the The disclosure content of the application is hereby also disclosed associated / attached priority documents (copy of the pre-registration) fully included, also for the purpose of describing the characteristics of these documents To include claims of the present application.

Claims (17)

1.Capping cap (V) for infusion or transfusion bottles, with a rubber-like sealing part ( 1 ) adapted to the bottle neck ( 3 ), the sealing cap ( 7 ) being formed on the bottle neck ( 3 ) to form a bulge ( 5 ), and wherein an overcap ( 8 ) is also provided for form-fitting retention of the closure cap ( 7 ) on the bottle neck ( 3 ), characterized in that the sealing part ( 1 ) is caught on the closure cap ( 7 ), that the sealing part ( 1 ) for the exterior of the closure cap ( 7 ) is exposed in a piercing area ( 17 ) and that the overcap ( 8 ) also covering the piercing area ( 17 ) is in a first, reversible locking position (I) with an axial distance (y) to the piercing area ( 17 ) on the closure cap ( 7 ) can be held. 2. Closure cap according to claim 1 or in particular according thereto, characterized in that the closure cap ( 7 ) and the sealing part ( 1 ) are produced in a two-component injection molding process. 3. Cap according to one or more of the preceding claims or in particular according thereto, characterized in that the sealing part ( 1 ) is due to shrinkage under elastic bias against the cap ( 7 ). 4. Closure cap according to one or more of the preceding claims or in particular according thereto, characterized in that the closure cap ( 7 ) in the circumferential direction designed like a segment of a circle, with a latching bead ( 15 ) provided under gripping tongues ( 14 ) has the outside latching formations ( 27 ) for latching the have corresponding locking projections ( 28 ) with an overcap ( 8 ) on a cylinder wall ( 25 ). 5. Closure cap according to one or more of the preceding claims or in particular according thereto, characterized in that the cylinder wall ( 25 ) of the overcap ( 8 ) for latching engagement of the closure cap ( 7 ) at its lower, free end via the latching projections ( 28 ) of the cylinder wall ( 28 ) protruding latch ( 24 ). 6. Closure cap according to one or more of the preceding claims or in particular according thereto, characterized in that the closure cap ( 7 ), assigned a closure cap cover ( 12 ), has a latching configuration ( 23 ) for reversible latching with the latching lug ( 24 ) of the overcap ( 8 ). 7. Cap according to one or more of the preceding claims or in particular according thereto, characterized in that the latching shape ( 23 ) is arranged in a cross section below the cap cover ( 12 ). 8. Cap according to one or more of the preceding claims or in particular according thereto, characterized in that the overcap ( 8 ) has an overcap cover ( 19 ) overlapping the piercing area ( 17 ). 9. Cap according to one or more of the preceding claims or in particular according thereto, characterized in that in the overcap cover ( 19 ) by a line of weakness ( 29 ) a tear tab ( 22 ) extending to the outer edge of the overcap cover ( 19 ) is formed is. 10. Cap according to one or more of the preceding claims or in particular according thereto, characterized in that two diametrically opposed tear tabs ( 22 ) are formed, each extending up to a central region of the overcap cover ( 19 ). 11. A closure cap according to one or more of the preceding claims or in particular according thereto, characterized in that a tear-open tab ( 22 ) is in each case associated with a piercing area ( 17 ) which is peripherally surrounded by the cover cap cover ( 12 ). 12. Cap according to one or more of the preceding claims or in particular according thereto, characterized in that the overcap ( 8 ) on the cap ( 7 ) is secured against rotation. 13. Closure cap according to one or more of the preceding claims or in particular according thereto, characterized in that the rotation lock is achieved by vertical ribs ( 31 ) formed on the inside on the cylinder wall ( 25 ) of the overcap ( 8 ), which in corresponding vertical grooves ( 32 ) of the closure cap ( 7 ) intervene. 14. A closure cap according to one or more of the preceding claims or in particular according thereto, characterized in that a vertical groove ( 32 ) is formed on the closure cap ( 7 ) through the separation area between two circular segment-like gripping tongues ( 14 ). 15. Cap according to one or more of the preceding claims or in particular according thereto, characterized in that the vertical groove ( 32 ) continues up to the top of the cap cover ( 12 ), leaving a residual amount ( 33 ) of the ring wall ( 13 ) of the cap ( 7 ). 16. Cap according to one or more of the preceding claims or in particular according thereto, characterized by a weakly frustoconical transition of the wall of the cap ( 7 ) to the cap cover ( 12 ). 17. A closure cap according to one or more of the preceding claims or in particular according thereto, characterized in that the sealing element (1) at a radial spacing (z) to the inside (36) of the annular wall (13) of the closure cap (7) ends.