Patent Publication Number: US-11376192-B2

Title: Plastic container product

Description:
FIELD OF THE INVENTION 
     The invention relates to a plastic container product, in particular one produced by a blow molding, filling and sealing method, including a container body having a content of the container and an adjoining head part, which delimits an extraction area. The extraction area is closed by a head membrane, which has a connecting seam. The connecting seam passes through a surface spanned by the head membrane and separates penetrable areas on the free end face of the head membrane from each other for extracting the content of the container. 
     BACKGROUND OF THE INVENTION 
     Plastic containers, which are produced in a blow-molding, filling and sealing process (BFS process), as described, for example, in EP 2 269 558 A1 and also known in the professional world as the Bottelpack® system, are used with great advantage for food and luxury foodstuff and in medicine for the packaging of pharmaceuticals, diagnostics, enteral nutrition and medical devices, e.g. rinsing and dialysis solutions. A significant advantage of these containers for such purposes is that the contents are solely in contact with a polymer constituting the container material, typically a plastic such as LDPE, HDPE or PP. The germ reduction/sterility of the contents can be maintained for extended periods of time using integral containers made and filled using the BFS process. Containers intended for injection, infusion, transfusion or enteral nutrition have a specific shape of the head area for the formation of points of access to the contents of the container. The integral design of container and head makes for a secure sterility of the contents at a particularly efficient implementation of the manufacturing process. Caps having elastomer sealing elements (DIN ISO 15759) are applied to the container head by welding or injection molding. In such containers—just like in other container products for medical purposes, such as injection vials, cylindrical vials or plastic containers for injections (DIN EN ISO 15747:2012-07)—polymer or elastomer particles can be punched out of the closure material, e.g. when puncturing using injection needles or piercing devices. These loose particles can remain in the cannula, the syringe, or in the container itself. This situation can inter alia lead to the clogging of the cannula, rendering the extraction and/or the injection procedure impossible. Particles can also get into the product. 
     In view of this problem, EN ISO 8871-5:2014 specifies limits in the use of injection vials having an elastomeric closure, same as in the US Pharmacopoeia Chapter 381. To address this problem—also known as fragmentation—special needle geometries have been proposed by Marinacci et al. in the prior art (U.S. Pat. No. 5,868,721), which, however, necessitate costly and expensive special cannulas. 
     WO 81/02286 discloses a plastic container having preferred thin-walled piercing positions for a cannula arranged on a defined lateral shoulder area of the container. In this case, sufficient thinning is only possible by a very complex tool technology, accepting retracted areas, which renders cleaning very difficult. Moreover, the container cannot be completely emptied via these thin spots because they are not at the highest or lowest point of the container. 
     In contrast, U.S. Pat. No. 4,574,965 (Meierhoefer) discloses a container product produced by a blow molding, filling and sealing method having a specially designed double dome geometry without thinning for the container head, in this way ensuring a secure sealing and no particle formation when it is punctured using a cannula for an extraction from the container. In this case, thin wall thicknesses in the puncturing area are not necessary. The necessary double-dome geometry permits only one puncture point and deviates very much from the proven head geometry of blow, fill and seal infusion containers designed as container products and requires special cap systems, which do not comply with the well-proven ISO standard 15759:2006-05, which in turn is costly and can impair the functional safety of the entire container system. 
     Moreover, U.S. Pat. No. 4,574,965 (FIGS. 1 and 3) shows, as does CN 85103261 A (FIGS. 1, 2 and 3), a disadvantageous course of the mold parting line in the head area (FIGS. 1 and 3: seam  18 ). For that reason, the puncturing point is very close to the edge of the container head and carries the real danger of unintentionally puncturing the neck area of the container with the cannula even at an only slightly divergent piercing angle. Another disadvantage is the low central rigidity of the container head, addressed in DE 10 2013 012809. In this document numerous different dome head shapes having multiple top surfaces are proposed for the stiffening of the head area, which also require detailed adapted cap designs and significantly reduce the puncture area compared to the top surface in accordance with DIN EN ISO 15759:2006-05. This arrangement also reduces the possible spacing between the two puncture points, which in turn can result in disadvantages in the application, for instance in the administration of infusions, if the somewhat projecting drip chamber of a pierced infusion device (EN ISO 8536-4: 2013) blocks the puncture site for the cannula, which has to be used to inject another medication during the infusion. 
     FIG. 4 of EP 0621027 A1 (Weiler) discloses a container having a parting line (42, “parting line”, column 8, II 26), which in an end-face view extends in a rectilinear line across the container body. Such a parting line typically results during blow molding due to the use of bi-partite molds. The parting line results from the separations of the bi-partite forming tool. The corresponding sealing or connecting seam in the head area has a minimal length and follows the course of the parting line in a rectilinear line. Just like in this example, sealed seams in general—not only in blow-molded containers—should be as short as possible to minimize the risk of weaknesses, imperfections or even leaks, which may have dire consequences for the health of the patient in the case of filled sterile containers for medical purposes. 
     In particular, sealing seams are sensitive and prone to occurring leaks in containers having a multilayer wall construction—for example as described in EP 1616549 B1 and DE 10347908 A1. 
     DE 10 2013 012 809 A1 relates to a container product, in which, instead of a uniform head membrane, which spans the end of the head part of the container body at a uniform curvature, different top surfaces are formed. The top surfaces form different curvatures at the head part end, such that for the possible total extraction surface of the head membrane, an increased resistance to deflection and easier puncturing, cutting or penetration is achieved. A deflection of the head membrane during extraction and the risk of leaks are kept to a minimum. The handling is safe even when using not very sharp piercing spikes, blades or thick cannulas. 
     SUMMARY OF THE INVENTION 
     Based on this prior art, the present invention addresses the problem of providing a container product that is further improved in comparison to the known solutions, in particular regarding the handling and extraction behavior of the contents of the container. 
     A container product solving this problem has a connecting seam seen on the free end face of the head membrane with a course of the seam at least partially deviating from a fictitious rectilinear course extending within the head membrane surface. The seam length is longer than a rectilinear course and at least partially extends around the penetrable areas allowing very thin-walled, penetrable areas to be formed. These penetrable areas are supported by the extended connecting or sealing seam, extending in the surface of the head membrane such that there is no unintentional denting of the entire head membrane resulting in impaired extraction behavior, in particular with regard to sterility during an extraction from or addition to the contents of the containers at the respective penetrable areas. As incorrect operations are precluded in this respect, the handling of the plastic container product according to the invention as a whole is made easier for an operator. Moreover, this container of the invention ensures a safe addition to and/or extraction of the contents of the container in each case. The support and bracing function for the addition or extraction procedure based on the connecting seam according to the invention is also ensured by the fact that, leaving the rectilinear alignment, it at least partially encompasses the penetrable areas, thus further stiffening the edges. The supporting and securing connecting seam of the head part permits the reduction of the penetrable areas on the free end face of the head membrane from the wall diameter compared to the other wall parts of the head membrane, which further facilitates the mentioned addition and/or extraction procedure. 
     Surprising to a person of ordinary skill in the art, compared to an otherwise rectilinearly oriented course, is that the substantially elongated connecting seam based on the known blow-molding, filling and sealing process (BFS) in a manner that is routinely safe in production, permits the manufacture of thinner areas as penetrable areas with thicknesses of 0.10 mm to 0.25 mm without any problems. Particularly, this container is without resulting leaks at the connecting seam, technically known as a head seal seam or head weld, and is without tearing occurring at the thin areas at internal pressure stresses in the temperature range above 110° C. Those temperature ranges occur, for instance, during the sterilization of the filled container product in the context of the required autoclave process. On one hand, owing to the counter-shearing movement of the still hot polymer in the third manufacturing step of the BFS process, i.e. during the sealing of the container head part, a favorable orientation of the polymer chains and/or an advantageous state of stress in the system head membrane/connecting seam/penetrable areas occurs. On the other hand, as already mentioned, the supporting effect of the connecting seam, which almost reaches the thin puncture areas, is of particular importance. 
     In a particularly preferred embodiment of the container product according to the invention, the course of the connecting seam is formed as a kind of sealing or welding seam, which is formed during the creation of the head part in the context of the blow molding, filling and sealing process (BFS). The seam extends on opposite sides of the head part along the head part and merges into the mold parting line that results from its production using multi-partite forming tools as part of the BFS process. In the production of the pertinent sealing seam for the head part, the penetrable areas mentioned are also formed in the head membrane in the context of the aforementioned production method. The thickness of the penetrable areas is reduced in comparison to the average wall thickness of the head membrane. In doing so, the sealing or welded seam fully penetrates the head membrane in a sealed manner. 
     It has further been found to be particularly advantageous, that the course of the seam in the head membrane merges at two opposite points into the corresponding parting lines/course of the seam in the other head part. Between them, the lines form a fictitious connecting rectilinear line, on which and/or outside of which the centers of the penetrable areas of the head membrane are located. In one embodiment the fictitious rectilinear line delimits at least one penetrable area in the manner of a tangent. Alternatively, this area is located at a predeterminable distance from the fictitious rectilinear line. In this way, the penetrable areas can be arranged in a supported manner on the head membrane of the container product for a variety of applications. 
     In this context, it has also been proven to be particularly advantageous to form the connecting seam similar to or exactly following the course of a sinusoidal wave on the head membrane. The wave trough and/or wave peak of each receives a penetrable area of the head membrane and comprises it at least partially in a supporting manner. 
     In a further particularly preferred embodiment of the container product according to the invention provision is made that the head part of the container body and/or a collar between the head part and the container body is preferably firmly connected to a cap part having externally detachable or detached puncture parts. The puncture parts are arranged congruently with the assignable penetrable areas of the head membrane. As the mentioned, penetrable areas in the head membrane can be arranged eccentrically, and the puncture parts of the cap part have to cover the penetrable areas for an extraction procedure. According to the invention, provision can be made advantageously to apply the cap parts to the container rotated by a predetermined offset angle. 
     Overall, a container product is created based on the solution according to the invention,
         which can be produced safely and reproducibly by the blow-molding, filling and sealing process with a low risk of leakage,   whose container head geometry essentially corresponds to DIN ISO 15759:2006-05,   which preferably has two spatially separated, equally penetrable areas having a controlled thinner wall thickness, during the puncturing of which using a standard cannula (DIN EN ISO 7864) very few particles—if any—are punched even without a cap, that permits low puncture forces when puncturing using a piercing device of an infusion device according to EN ISO 8536-4: 2013, and   which permits the application of cap parts having two puncture sites on the container body even in oblique positions.       

     Other objects, advantages and salient features of the present invention will become apparent from the following detailed description, which, taken in conjunction with the drawings, discloses preferred embodiments of the present invention. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Referring to the drawings that form a part of this disclosure and that are schematic and not to scale: 
         FIG. 1  is a perspective view, reduced in size in comparison with a built embodiment, of a plastic container product in the form of an infusion container having a head part according to the prior art according to DIN ISO 15759; 
         FIG. 2  is an enlarged perspective view of the head part of the container product as shown in  FIG. 1 ; 
         FIG. 3  is an enlarged perspective view of a head part for a container product according to a first exemplary embodiment of the invention; 
         FIG. 4  is a frontal plan view of a head membrane, as used for a head part of  FIG. 3 ; 
         FIGS. 5 to 8  are frontal plan views of head membranes, with each having different courses of connecting seams and other arrangements of penetrable areas according to a second, third, fourth and fifth exemplary embodiments, respectively, of the invention; 
         FIG. 9  is a side view in section through a head part of a container part according to a sixth exemplary embodiment of the invention, having a possible head membrane design according to one of  FIGS. 3 to 8  and having an attached cap part, wherein the state during the piercing movement using a piercing device for performing an extraction procedure of the content of the containers is shown; and 
         FIG. 10  is a perspective view of the cap part of  FIG. 9  having puncture parts covered by the cap, wherein the position the cap part as a whole is arranged oblique in relation to the longitudinal direction of the container product only partially shown. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       FIG. 1  shows a plastic container product disclosed in the prior art (DE 10 2013 012 809 A1), which is manufactured according to the blow molding, filling and sealing method (BFS), having a content of the container (not shown) of a conventional type. The container product comprises a container body  10  and an adjoining head part  12 , which delimits an extraction area  14 . The extraction areas  14  is closed by a head membrane  16 , which has a connecting seam  18  extending through a plane spanned by the head membrane level  20  and separating two penetrable areas  22 ,  24  on the free end face  26  of the head membrane  16  for an extraction of the content of the containers as shown in detail in  FIG. 2 . The penetrable areas  22 ,  24  are illustrated in idealized form as a circle having the centers M 1 , M 2 , respectively. Further components of the head part  12  are a neck part  28  and a collar part  30 . 
     The container product shown in  FIG. 1  is an infusion bottle integrally manufactured according to the BFS method, of a plastic material, in particular a polyolefin material. The head part  12  formed in the example shown from the prior art in accordance with DIN ISO 15759:2006-05 can be connected to cap parts  31  in accordance with ISO 15759-BFS-A or ISO 15759-BFS-B by welding or injection molding onto the collar part  30 , such as shown by way of example in  FIGS. 9 and 10 . The continuous and uniformly convex curved head membrane  16  is located at the free end-side end of the head part  12  for extraction and/or addition processes, which head membrane can be punctured for instance by a cannula (DIN EN ISO 7864) or piercing device  34  (EN ISO 8536) in the indicated arrow direction, such as in the  FIG. 9  by way of example. Looked at from above in a vertical plan view of the end face  26  of the head membrane  16 , the protruding curved seam  18  shown that follows a fictitious rectilinear course  32 , which is shown in dashed lines in  FIG. 2 . This fictitious rectilinear course  32  establishes the shortest connection between two points E 1  and E 2 , at which the known connecting seam  18  continuously merges into the adjoining shape-separating line  19  in the head part  12 . The arcuate or chord-shaped connecting seam extending between the punctiform points E 1  and E 2   18  follows the curvature of the head membrane  16  and is formed as a reinforcing rib, preferably protrudes by a predetermined projection beyond the free end face  26  of the head membrane  16 . Furthermore, the mold parting lines  19  merge into a mold parting line  21  of the container body  10 , which in the BFS process is typically formed by a bi-partite mold. 
     Viewed in the direction of  FIG. 2 , the two opposite penetrable areas  22 ,  24  are located on both sides of the curved connecting seam  18 , which for the sake of a better depiction are shown as closed circles having the centers M 1  and M 2 . However, owing to their production, the areas  22 ,  24  can also have other peripheral geometries, for example elliptical, crescent-shaped or the like. These penetrable or pierceable areas  22 ,  24  have, as is suggested in  FIG. 9 , reduced wall thicknesses, which are thinner than the other wall thickness of the head membrane  16 . The reduced wall thicknesses of the penetrable areas  22 ,  24 , which, as explained above, may actually have a somewhat different shape than a circular shape, result from flow processes of the material during the manufacturing process by the BFS process. However, they can also be intentionally obtained by appropriate shaping using suitable tools in the head membrane  16 . For the sake of completeness it should be mentioned that according to ISO 15759, the diameter of the head membrane  16  could typically be 30 mm. 
     The connecting seam  18 , which is also referred to as sealed head seam in technical terms, thus extends from the one point E 1  of the head part  12  to the opposite point E 2  of the same head part and, as reinforcing means in the form of a protruding rib, at least partially provides support against the unwanted indentation of the entire head membrane  16  when an extraction device, such as a cannula or a piercing device  34 , is applied for a subsequent extraction or addition procedure in relation to the content of the containers. Without such a rib-shaped reinforcing means or reinforcement, puncturing the head membrane  16  would essentially not be possible when the piercing tool  34  is applied as shown in  FIG. 9 . Rather, for a thin-walled design, the head membrane  16  would be cambered inwards and prevent an effective piercing or penetration. If then, which appears to be obvious, the wall thickness of the head membrane  16  is designed having an appropriate thickness, such that the head membrane  16  itself forms a support even without a bead-like reinforced seam  18 . However, an increased force is required for the piercing process by the piercing tool  34 . In particular, the fragmentation mentioned above occurs, where the loose plastic particles from the thickened wall areas increasingly reach the extraction channel (not shown) of the piercing tool  34 , which is to be avoided in any event. 
     Although the rib-shaped reinforcing seam  18  according to the representations in the prior art according to  FIGS. 1 and 2  already provides a remedy for this problem; still, it has been found in practice that this known solution for a functionally reliable and undisturbed extraction procedure for a container, in particular in the form of an infusion container, still leaves something to be desired. An improvement can be fulfilled by the solution according to the invention as shown in  FIG. 3  et seq. For completeness sake, for the extraction of the content of the container from the container by a piercing tool, an addition procedure of at least one medium may be provided upstream thereof, for example in the form of a drug delivery into the pre-filled container holding the container liquid, such as an infusion fluid. The piercing tool  34 , which is only shown in principle in  FIG. 9 , can be a conventional injection needle of a syringe. 
     In the solution according to the invention as shown in  FIGS. 3 and 4 , the connecting seam  38  arranged on the free end face  26  of the head membrane  16  has a seam course  36  deviating from the fictitious rectilinear course  32 , which extends as a surface within the plane  20  or within the bulging head membrane  16 . The seam course  36  is longer than the rectilinear course  32  and at least partially encompasses the penetrable areas  22 ,  24 . The non-rectilinear course  36  of the connecting seam  38  according to the invention indicates the position or location of the respective penetrable areas  22 ,  24  at the head membrane  16  to an operator, as the connecting seam  38  comprises approximately half of the respective penetrable areas  22 ,  24 . 
     As can also be seen from  FIGS. 3 and 4 , the connecting seam  38  extending within the plane  20  of the head membrane  16  has an alternating, preferably curved course that forms a sinusoidal wave  40 . The wave trough  42  and the associated wave peak  44  of each receive one penetrable area  22  or  24  of the head membrane  16 , and thus, at least partially comprises half of one. The seam course  36  in the head membrane  16  here also again merges at two opposite points E 1 , E 2  into the other seam course in the head part  12 . The two opposite points E 1  and E 2  between them form the fictitious connecting line  32 , which corresponds to the fictitious rectilinear seam  32  as shown in  FIG. 2 . The centers M 1 , M 2  of the penetrable areas  22 ,  24  of the head membrane  16  are located on this imaginary rectilinear connecting line  32 . 
     The head membrane  16  has a circular outer circumference. The fictitious connecting line  32  defines a fictitious center point Z based on a further fictitious connecting line  48 , which is perpendicular to the rectilinear line  32 , through which the wave  40  as shown in  FIG. 4  of the seam  38  according to the invention passes at the point of transition from wave valley  42  to wave peak  44 . 
     If, as shown in  FIG. 4 , a tangent through the center point Z is applied to the wave trough  42  and the wave peak  44 , this tangent T forms an angle α of approximately 50° with the imaginary connecting rectilinear line  32 . Other angular dimensions a in the range of approx. 40° ( FIG. 8 ) to 75° ( FIG. 5 ) are possible depending on the embodiment of the connecting seam  38 . In the embodiment shown in  FIG. 7 , the transition from wave trough  42  to wave peak  44  extends outside of the central fictitious center point Z through the consequently other center point Z+1, through which the tangent would then have to be centered, as shown in  FIG. 4 . The angle α, however, remains unchanged. 
     As is further apparent from  FIGS. 3 and 4 , the start P 1  of the wave trough  42  and the start or end P 2  of the wave peak  44  of a wave  40  of the connecting seam  38  in each case transition into a section  50 , which in turn viewed in plan view, towards the end face  26  of the head membrane  16 , extends along the fictitious connection line  32 . The respective sections  50  at the edge open into the opposite positions E 1 , E 2  on the head part  12 . Instead of rectilinearly selected sections  50 , these can also have an arcuate course in continuation of the sine wave  40  or in the opposite direction to this wave path. The length of the wave-shaped connecting seam  38  is preferably selected to be longer than the diameter of the circularly shaped head membrane  16  by at least 30%. 
     The penetrable or puncturable areas  22 ,  24  on the head membrane  16  are selected to be largely equal in size in the exemplary embodiment shown in  FIGS. 3 and 4 . As is further shown in  FIG. 9 , the two penetrable areas  22 ,  24  on the head membrane  16  have wall thicknesses, which are thinner than the other average wall thickness of the remaining head membrane  16 . The average wall thickness of a penetrable areas  22 ,  24  is preferably between 0.15 mm and 0.35 mm. The wall thicknesses for each penetrable area  22 ,  24  can also be chosen differently, such that, for example, a penetrable area is particularly suitable for introducing a piercing cannula and another penetrable area permits good accessibility for the introduction of a syringe needle. Furthermore, the two surfaces of the penetrable areas  22 ,  24  can be selected to be of different sizes, as shown by way of example in  FIG. 7  for a head membrane  16  changed in that respect. In one embodiment of a head membrane  16  as shown in  FIG. 8  the sequence from wave trough  42  to wave peak  44  is altered such that viewed in the direction of  FIG. 8 , on the left side the wave peak  44  occurs before the wave trough  42 . 
     The connecting seam  38  on the individual head membrane  16  may protrude in the manner of a reinforcing rib at least partially outwardly towards the environment and/or in the direction of the interior of the container body  10 . An outward protrusion for the known solution according to the  FIG. 2  is shown there. For the sake of simplicity, the rib design was omitted in the illustration in  FIG. 3  et seq. The head membrane  16  shown in the figures is shown in each case as a curved surface in the form of the plane  20 , which projects convexly outwards towards the environment. However, it is quite possible to form the head membrane  16  as a plane, i.e. an uncurved, planar plane (not shown). A polyethylene, a cyclic olefin polymer, a polypropylene but also a cyclic olefin copolymer, a polypropylene copolymer or a polypropylene blend can be used routinely as a plastic material for the container body  10 . Furthermore, the container wall of the container according to the invention may have a multilayer structure (not shown) of at least two materials. 
     In order to obtain the wave-shaped connecting seam  38 , the molding tools in the case of a corresponding molding device have to be designed such that they have the required mold recesses and protrusions on their opposite end faces in order to obtain the wave form for the head part  12 . Such a molding device for moving molding tools for generating pertinent head geometries in plastic containers having slide control is shown in DE 103 17 712 A1 by way of example. The waveform shown in the figures for the connecting seam  38  has proven to be particularly advantageous in terms of manufacturing. However, other waveforms can be selected, for example, in the manner of an S-shaped arc having different courses of the curve. Furthermore, meandering seam courses or zigzag seam courses can be implemented, if required. It is important to select the course of the seam of the connecting seam  38  such that the respective penetrable areas  22 ,  24  are at least partially enclosed in order to sufficiently stabilize them during piercing. The elongated course of the seam  36  results in an improved reinforcement of the otherwise soft plastic head membrane  16 . More than two penetrable areas can be mounted on the head membrane  16  (not shown). 
     The further embodiments of the head membrane  16  for a container product according to the invention as shown in the images in  FIGS. 5 to 8  are explained only insofar as they differ substantially from the preceding embodiments and if they have not been sufficiently explained above. 
     In the embodiment of a head membrane  16  shown in  FIG. 5 , the imaginary connecting rectilinear line  32  is tangent to the upper side of the penetrable area  22 , and the further penetrable area  24  has a predeterminable axial distance to this connecting rectilinear line  32 . In the embodiment shown in  FIG. 6 , the tangent T applied to wave trough  42  and wave peak  44 , which passes through the center point Z, is steeper than that in the embodiment shown in  FIG. 4 . Furthermore, as a further tangent, viewed in the direction of  FIG. 6 , the connecting line  32  touches the top of the penetrable area  22  and the bottom of the further penetrable area  24 , both of which are approximately the same size in terms of area. 
     In the embodiment shown in  FIG. 7 , the penetrable area  24  is selected to be smaller in diameter than the penetrable area  22 . Furthermore, as explained above, the course of the wave  40  through the further center point Z+1 is offset off center from the center point Z. In the embodiments shown in  FIG. 8 , the two penetrable areas  22 ,  24 , which are approximately equal in size, are tangent to the connecting rectilinear line  32 . As explained above, the course from wave trough  42  to wave peak  44  is reversed according to the exemplary embodiments shown in  FIGS. 3 to 7 . 
     In the exemplary embodiment according to  FIGS. 9 and 10 , the cap part  31  is placed on the head part  12  in a manner known per se. The cap part  31  is preferably made of a rigid plastic material, which generally has the shape of a circular cup  52  having a bottom and detachable tabs  54 ,  56 . As shown in  FIG. 9 , the right tab  56  is removed for an extraction procedure by the piercing tool  34 . The lower edge of the cap part  31  is integrally attached to a flange part  58 , which extends at the head part  12  between the collar part  30  and the neck part  28 . For the sake of simplicity,  FIG. 9  does not show the container body  10 , which may also have a different shape than the container body  10  shown in  FIG. 1  as shown in  FIG. 10 . The cap part  31  has two puncture parts  60 ,  62 , which cover the respective penetrable areas  22 ,  24  in an assigned manner (see  FIG. 9 ). The puncture parts  60 ,  62  each form a type of sealing part and are preferably formed of an elastomeric material having a low rigidity and low hardness. Preferably, thermoplastic elastomers are used for the puncture parts  60 ,  62 , which can be joined to the cap part  31  in a simple manner by a substance-to-substance bond, for instance by welding. The cap part contacts the connecting seams  38 , as shown in  FIG. 9 , by a cap center projection. 
     As is apparent from the illustration of  FIG. 10 , the transition in the form of the neck part  28  between the other head part  12  and the top of the container of the container body  10  has been omitted for the sake of simplicity. Furthermore, the solution having a cap part  31  according to  FIGS. 9 and 10  provides a particularly safe solution, as the penetrable areas  22  and  24  are only detached for an extraction or addition procedure after the removal of the respective tabs  54  and/or  56 , in which case the piercing tool  34  has yet to penetrate the respective elastomeric puncture parts  60 ,  62 . 
     Furthermore, the solution according to the invention, as shown in particular in  FIG. 10 , can be used to set the cap part  31  on the head part  12  assigned to the penetrable areas  22 ,  24  in an offset. In this way, the two penetrable areas  22  and  24  can be on ( FIG. 4 ) or outside ( FIGS. 5-8 ) of the fictitious connecting rectilinear connecting line  32 , such that in this respect the longitudinal axis  64  drawn through the two tabs  54 ,  56  forms an offset angle β with the fictitious rectilinear line  32 , which angle can in the exemplary embodiment of  FIG. 10  form an angle of approximately 45°. That angle may also readily have values between 0° ( FIG. 4 ) and approx. 30° ( FIG. 5 ) and more. Thus, it is possible depending on the purpose, to orient the cap orientation of the cap part  31  for a BFS bottle and its two openings  60 ,  62  to be in parallel to the axis  32  of the container  10 . Designs having other cap orientations, preferably between 0° to 50°, to the longer transverse axis or connecting line  32  of the container bottle  10  as shown in the image of  FIG. 10 , are possible. 
     While various embodiments have been chosen to illustrate the invention, it will be understood by those skilled in the art that various changes and modifications can be made therein without departing from the scope of the invention as defined in the claims.