Abstract:
A closure system for a bottle for baby food having a bottom shell part and a bottom closure ring that can be screwed onto a thread of a bottle, and a bottom partition wall above an inner thread on the edge connected to the bottom shell part blocking the cross-section of the bottom shell part, the bottom partition wall having a top side and a bottom side with a bottom flow hole ending in the first top side and in the bottom side, a top closure ring connectable to a threaded ring to fasten a teat to the top edge of the top shell part, with a top partition wall blocking the cross-section of the top shell part and connected at the edge to the top shelf part, locking elements locking the bottom closure ring and top closure ring in a rotatable, releasable manner, and an elastic sealing lip.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    This is a national stage application of PCT/EP2011/003636, Filed on Jan. 20, 2011 
     
    
     STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH 
       [0002]    Not applicable. 
       BACKGROUND OF THE INVENTION 
       [0003]    The invention relates to a closure system for a leak-proof bottle for baby food. 
         [0004]    With known bottles for baby food, the bottom edge of the nipple has a peripheral nipple flange that is sealingly fixed to the edge of a bottle opening by means of a threaded ring screwed onto the outer thread of the bottle. To prevent liquid from leaking during pauses in drinking, a cover is placed between the nipple flange and the edge of the bottle and is clamped tight by means of the threaded ring. 
         [0005]    DE 101 57 071 C1 discloses a user-friendly, leak-proof bottle for baby food. This has a bottom closure ring screwed onto the outer thread of the bottle and possesses a first seat surface having at least one first flow hole. A top closure ring has a second seat surface with at least one second flow hole. The two sealing rings are rotatable relative to each other by means of locking elements and are releasably locked with each other. By rotating the top closure ring, the first and second flow holes can be brought into overlapping and non-overlapping positions. A teat is screwed on by means of a threaded ring to an outer thread of the top closure ring. When the flow holes overlap each other, baby food can be removed through the teat. If the flow holes do not overlap, the removal of baby food through the teat is blocked. 
         [0006]    In the exemplary embodiment, the closure rings have conical seat surfaces. Furthermore, sealing rings are arranged on the bottom side of the bottom closure ring and on the top side of the first seat surface. The bottom closure ring has a locking projection that projects inward from the bottom conical seat surface, and the top closure ring has snap tongues projecting from the bottom second conical seat surface that engage behind the locking projection. 
         [0007]    EP 1 931 300 B1 describes a leak-proof bottle for baby food having a bottom and top closure ring where the first and second seat surfaces are designed flat. This simplifies the production of the closure rings, prevents the collection of residual food and impurities, and makes it easier to clean the closure rings. 
         [0008]    In addition, this patent describes a leak-proof bottle for baby food with bottom and top closure rings that have first and second middle parts with first and second seat surfaces in which first and second flow holes are arranged. A soft elastic sealing material consisting of plastic is injected-molded onto a sealing surface of the first middle part that sits on and seals the top edge of the bottle. With this bottle, the sealing material extends from the first seat surface through the through-holes over the side facing the interior of the bottle up to the sealing surface of the first middle part. Production is thereby simplified. 
         [0009]    Furthermore, this patent describes a leak-proof bottle for baby food having a bottom closure ring and a top closure ring and a bayonet lock between the bottom closure ring and top closure ring that locks them to each other in a rotatable and releasable manner. The bayonet lock can be designed so that it does not contact baby food, and this counteracts impurities, reduces cleaning effort and makes use easier. 
         [0010]    WO 2011/012310 A2 describes a locking system for a leak-proof bottle for baby food having a bottom closure ring and a top closure ring. The bottom closure ring has a bottom partition wall, and the top closure ring has a top partition wall. On the top side of the bottom partition wall, there is an annular lip seal concentric with the bottom closure ring that consists of a soft elastic material having at least one axially aligned sealing lip. At least one annular sealing geometry that is concentric with the top closure ring and engages with the lip seal is on the bottom side of the partition wall of the top closure ring. Both partition walls have flow holes that can be brought into overlapping and non-overlapping positions. In the exemplary embodiment, the lip seal is a double lip seal having two sealing lips extending vertically upward, and the sealing geometry has two annular, peripheral sealing grooves in which the sealing lips of the double lip seal engage. Alternately, the lip seal can be arranged on the bottom side of the top partition wall, and the sealing geometry can be arranged on the top side of the bottom partition wall. 
         [0011]    Furthermore, this document describes a locking system for a leak-proof bottle for baby food having a bottom closure ring and a top closure ring. At least one bottom flow hole is arranged in a bottom partition wall of the bottom closure ring, and at least one top flow hole is arranged in the partition wall of the top closure ring. Furthermore, at least one sealing cushion in the shape of a pie wedge that consists of a soft elastic material is arranged on the bottom partition wall, and at least one top flow hole of the top partition wall has an edge-side sealing seat that is complementary with the pie wedge shape. By rotating the closure ring relative to the bottom closure ring, the top flow hole can be brought into an overlapping position relative to the bottom through-hole, and the sealing seat can be brought into a sealing position relative to the sealing cushion. Alternately, the pie-wedge shaped sealing cushion can be on the bottom side of the top partition wall, and the flow hole with the edge-side sealing seat that is complementary with the pie-wedge-shape can be in the bottom partition wall. These locking systems provide a particularly good seal. 
         [0012]    In the known locking systems according to WO 2011/012310 A2, it requires a great deal of force to rotate the top closure ring relative to the bottom closure ring. In addition, leaks can arise due to the elevated internal pressure of the bottle. An elevated internal pressure can arise in the bottle in particular when food is shaken in or mixed in before drinking, for example when mixing powdered milk with water. 
         [0013]    Given this background, the invention is based on creating a closure system for a leak-proof bottle for baby food that seals well and is easy to use. 
       BRIEF SUMMARY OF THE INVENTION 
       [0014]    The closure system for a leak-proof bottle for baby food has:
       A bottom closure ring that has a substantially cylindrical bottom shell part with an inner thread that can be screwed onto an outer thread of a bottle, and a bottom partition wall above the inner thread that is connected at the edge to the bottom shell part and blocks the cross-section of the bottom shell part, the bottom partition wall having a first top side and a first bottom side with at least one bottom flow hole ending in the first top side and in the first bottom side,   A top closure ring that has a substantially cylindrical top shell part with an outer thread that is connectable to a threaded ring to fasten a teat to the top edge of the top shell part, and that has a top partition wall blocking the cross-section of the top shell part and is connected at the edge to the top shell part, the partition wall having a second top side and a second bottom side seated on and sealing the first top side with at least one top flow hole ending in the second bottom side and in the second top side,   Locking elements that lock the bottom closure ring and top closure ring with each other in a rotatable and releasable manner relative to each other,   Wherein a sealing lip that consists of a soft elastic material and is concentric with the bottom shell part projects upward from the first top side and expands radially outward at an increasing distance from the first top side and abuts a sealing surface under elastic pretension on the inside of a wall that projects downward from the second bottom side and is concentric with the top shell part, or vice versa, and the top flow hole can optionally be brought into overlapping and non-overlapping positions relative to the bottom flow hole by turning the top closure ring relative to the bottom closure ring.       
 
         [0019]    With the closure system according to the invention, a particularly good seal is achieved between the bottom closure ring and top closure ring when the sealing lip consisting of soft elastic material contacts the inside of a sealing surface under elastic pretension. The contact between the sealing lip and the sealing surface can be restricted to an annular peripheral line or narrow strip. A good seal is achieved by means of the comparatively high surface pressure in the small contact surface, and only comparatively low friction forces act between the sealing lip and sealing surface. Consequently, the top closure ring can be rotated with only a slight amount of force relative to the bottom closure ring to open or close the closure system. In contrast, opening or closing the closure system according to WO 2011/012310 A2 requires a large amount of force due to the high friction in the large contact surface between the double lip seal and two sealing grooves. It is therefore easier for the user to use the closure system, nevertheless leaks are reliably prevented. 
         [0020]    At the same time, the sealing lip allows a teat to be ventilated that is connectable to the top closure ring by means of a threaded ring. A vacuum in a teat can cause the sealing lip to lift off the sealing surface at least sectionally so that air can flow into the section between the partition walls through the gap or vent channel between the bottom closure ring and top closure ring and can enter through a top flow hole into the teat. A vent valve in the teat which is complicated to produce can be dispensed with. A vent channel or gap is preferably between the bottom closure ring and top closure ring and extends up to the sealing surface. 
         [0021]    The designation “or vice versa” in the last feature of the claim indicates a version in which the sealing lip projects downward from the second bottom side of the top closure ring, and the wall with the sealing surface projects upward from the first top side of the bottom closure ring. 
         [0022]    The closure system according to the invention for a leak-proof bottle for baby food has:
       A bottom closure ring that has a substantially cylindrical bottom shell part with an inner thread that can be screwed onto an outer thread of a bottle, and a bottom partition wall above the inner thread that is connected at the edge to the bottom shell part and blocks the cross-section of the bottom shell part, the bottom partition wall having a first top side and a first bottom side with at least one bottom flow hole ending in the first top side and in the first bottom side,   A top closure ring that has a substantially cylindrical top shell part with an outer thread that is connectable to a threaded ring to fasten a teat to the top edge of the top shell part, and that has a top partition wall blocking the cross-section of the top shell part and is connected at the edge to the top shell part, the partition wall having a second top side and a second bottom side seated on and sealing the first top side with at least one top flow hole ending in the second bottom side and in the second top side,   Locking elements that lock the bottom closure ring and top closure ring with each other in a rotatable and releasable manner relative to each other,   where at least one sealing cushion consisting of a soft elastic material is arranged on and seals the bottom partition wall over a cutout in the bottom partition wall, and at least one top flow hole having an edge-side sealing seat complementary with the contour of the sealing cushion is arranged in the second bottom side of the top partition wall, and the top flow hole can optionally be brought into an overlapping position relative to the bottom through hole, and the sealing seat can be brought into a sealing position relative to the sealing cushion by turning the top closure ring relative to the bottom closure ring.       
 
         [0027]    With the closure system according to the invention, the partition wall has a cutout below the sealing cushion. The cutout connects the first bottom side to the first top side of the bottom partition wall corresponding to the flow hole. A passage of liquid through the cutout is however prevented because the sealing cushion is arranged over and seals the cutout. The sealing cushion therefore blocks the cross-section of the cutout and is connected at the edge to the partition wall, providing a seal. When the sealing seat of the top flow hole is brought into a sealing position with reference to the sealing cushion by rotating the top closure ring relative to the bottom closure ring, the closure system prevents liquid from passing through. The seal is particularly good because elevated internal pressure in the container is applied against the bottom side of the sealing cushion, and this presses against the sealing seat on the edge of the top flow hole. Consequently, the seal of the sealing system is particularly good when it is necessary to ensure a seal under high pressure. Consequently, the sealing cushion only needs to lie against the sealing seat under a comparatively slight amount of elastic pretension when normal pressure acts on the bottom side of the sealing cushion. This makes it easier to adjust the closure system between open position and closed position. With the closure system according to WO 2011/012310 A2, the pie-wedge-shaped sealing cushion seated on the closed part of the partition wall contrastingly lies against the sealing seat under relatively high elastic pretension to reliably seal the bottle against overpressure in the bottle. This makes it more difficult to adjust the closure system between open and closed position. 
         [0028]    According to one embodiment of the closure system with a sealing lip, the sealing lip is in the shape of a hollow cone. The greatest diameter of the hollow-cone-shaped sealing lip lies against the inside of the sealing surface, providing a seal. It is particularly advantageous in terms of production. Alternately, the sealing lip can be trumpet-shaped or have a cross-section with an L profile. 
         [0029]    According to another embodiment, the inner diameter of the wall against and whose sealing surface the sealing lip lies, increases as the distance increases from the second bottom side of the top partition wall. This makes it easier to easily insert the sealing lip into its seat on the inside of the sealing surface and promotes and even sealing effect in the peripheral direction of the sealing lip. 
         [0030]    According to another embodiment, the wall has the sealing surface at the sealing area wherein the wall has its smallest inner diameter, which is followed by a conical transitional region at which the inner diameter of the wall increases as the distance from the second bottom side increases. At a conical transitional region, the wall preferably has a cylindrical insertion region where it possesses its largest inner diameter. Possibly after being inserted in the cylindrical insertion region, the sealing lip can be shifted along the conical transitional region toward the sealing surface. As it shifts along the conical transitional region, the sealing lip is evenly subjected to elastic pretension. 
         [0031]    According to another embodiment relating both to the closure system with a sealing lip and to the closure system with a sealing cushion, the locking elements are parts of a bayonet lock. The bayonet lock simultaneously allows the top closure ring to be locked with the bottom closure ring, and the top closure ring to be rotated relative to the bottom closure ring out of the open position into the closed position and vice versa. 
         [0032]    According to another embodiment, the bayonet lock has at least one radially projecting hook on the top closure ring, and at least one complementary lengthwise groove in the bottom closure ring, and at least one complimentary ring groove proceeding from the bottom end of the lengthwise groove that is angled downward in an initial region neighboring the lengthwise groove and subsequently runs in a ring shape so that, by screwing the hook out of the lengthwise groove into the ring groove, the sealing lip can be displaced from a region of the wall&#39;s greatest inner diameter into a region of the wall&#39;s smallest inner diameter at which the sealing lip abuts the sealing surface under pretension. Alternatively, the bayonet lock has at least one radially projecting hook on the bottom closure ring, and at least one complementary lengthwise groove in the top closure ring, and at least one complimentary ring groove proceeding from the top end of the lengthwise groove that is angled upward in an initial region neighboring the lengthwise groove and subsequently runs in a ring shape so that, by screwing the hook into the ring groove, the sealing lip can be displaced from a region of the wall&#39;s greatest inner diameter into a region of the wall&#39;s smallest inner diameter where the it abuts the sealing surface under pretension. 
         [0033]    The two above embodiments of the bayonet lock enable the sealing lip to be gradually shifted toward the sealing surface where the wall has its smallest diameter. The sealing lip is shifted into the sealing surface in a helical movement corresponding to the movement of the top closure ring dictated by the initial region of the ring groove. This yields a gradual, even, elastic pretension on the sealing lip to achieve a particularly good seal. 
         [0034]    According to another embodiment, the bayonet lock has a plurality of hooks and lengthwise grooves symmetrically distributed around the bottom and top closure rings. This prevents the top closure ring from assuming an angled position in relation to the bottom closure ring when adjusting the bayonet lock and yields a more even pretension on the sealing lip. 
         [0035]    According to a preferred embodiment, the bayonet lock has four hooks and lengthwise grooves symmetrically distributed around the bottom and top closure rings. 
         [0036]    The hook preferably points radially inward, and the lengthwise groove opens radially outward. However, embodiments are also possible in which the hook points radially outward, and the lengthwise groove opens radially inward. 
         [0037]    According to another embodiment, the top closure ring has a downward projecting tongue in addition to a hook on the top shell part, and the bottom closure ring has a partially peripheral groove on the bottom shell part that opens upward and starts next to a lengthwise groove so that the tongue engages from above in the partially peripheral groove upon inserting the hook next to it into the lengthwise groove and, by rotating the top closure ring relative to the bottom closure ring in the groove, can be shifted into an open position in which the flow holes of the top closure ring and bottom ring overlap each other and, by rotating further in the peripheral groove, can be shifted into a closed position at the end of the groove in which the top flow hole and the bottom flow hole do not overlap each other. The tongue is a position marker that indicates the respective setting of the closure system to the user. At the same time, the tongue is an ergonomic contact point that makes it easier for the user to grip and rotate the top closure ring relative to the bottom closure ring. This is particularly advantageous since the closure system is smudged, or the user&#39;s hands are wet with liquid. 
         [0038]    According to another embodiment, the bottom closure ring has a nib projecting radially outward from the bottom shell part. The nib improves the grip of the bottom closure ring. This is particularly advantageous when the closure system is smudged, or the user&#39;s hands are wet with liquid. 
         [0039]    According to another embodiment of the closure system with a sealing cushion, the sealing cushion has three primary sides of which two linear sides point toward the center of the bottom partition wall, and the third side runs curved in an arc around the center of the bottom partition wall, and/or the bottom and top flow holes have a corresponding contour. The contour of the sealing cushion or flow holes is particularly advantageous for liquid to flow out of the opened closure system. 
         [0040]    According to another embodiment, there is a narrow curvature radius between the linear slides, and/or between the linear sides and the curved side of the sealing cushion, and/or the flow holes. This is also advantageous for the outflow of milk and the seal of the flow holes. 
         [0041]    According to another embodiment, the sealing cushion has a peripheral edge region where the wall is thicker, and a central region above the cutout where the wall is thinner. The edge region provides a good seal in closed position. In addition, the transition between the edge region and central region indicates to the user that he has correctly adjusted the sealing cushion on the flow hole. 
         [0042]    According to another embodiment, the sealing lip consists of a thermoplastic elastomer, and/or the sealing cushion consists of a thermoplastic elastomer. The bottom and top closure rings preferably consists of polypropylene. Alternately, the sealing lip and/or the sealing cushion consist of silicone rubber. 
     
    
     
       BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS 
         [0043]    The invention will be explained below with reference to an exemplary embodiment that is portrayed in the accompanying drawings. In the drawings: 
           [0044]      FIG. 1  A vertical section of a closure system screwed onto a bottle for baby food having a screwed-on nipple; 
           [0045]      FIG. 2   a - i  The bottom closure ring of the same closure system in a front view ( FIG. 2   a ), in a view from the right side ( FIG. 2   b ), in a view from the left side ( FIG. 2   c ), in a top view ( FIG. 2   d ), in a bottom view ( FIG. 2   e ), in a section following line (A-A) from  FIG. 2   e  ( FIG. 2   f ), a section following line B-B from  FIG. 2   f  ( FIG. 2   g ), in a perspective view angled from above and from the side ( FIG. 2   h ) and in a perspective view angled from below and from the side ( FIG. 2   i ); 
           [0046]      FIG. 3   a - g  The top closure ring of the same closure system in a front view ( FIG. 3   a ), in a view from the right side ( FIG. 3   b ), in a view from the left side ( FIG. 3   c ), in a top view ( FIG. 3   d ), in a bottom view ( FIG. 3   e ), in a section following line A-A from  FIG. 3   d  ( FIG. 3   f ), in a section following line B-B from  FIG. 3   d  ( FIG. 3   g ); 
           [0047]      FIG. 4   a - d  The closure system composed of the bottom and top closure ring in an assembled position in a front view ( FIG. 4   a ), in a vertical section ( FIG. 4   b ), in a top view ( FIG. 4   c ) and in a section following line D-D from  FIG. 4   a  ( FIG. 4   d ); 
           [0048]      FIG. 5   a - g  The same closure system in opened position in a front view ( FIG. 5   a ), in a bottom view ( FIG. 5   b ), in a section following line A-A from  FIG. 5   b  ( FIG. 5   c ), in a section following line B-B from  FIG. 5   b  ( FIG. 5   d ), in a view from the right side ( FIG. 5   e ), in a perspective view angled from above and from the side ( FIG. 5   f ) and in a perspective view angle from below and from the side ( FIG. 5   g ); 
           [0049]      FIG. 6   a - d  The same closure system in closed position in a front view ( FIG. 6   a ), in a top view ( FIG. 6   b ), in a section following line B-B from  FIG. 6   b  ( FIG. 6   c ) and in a section following line D-D from  FIG. 6   b  ( FIG. 6   d ). 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0050]    While this invention may be embodied in many different forms, there are described in detail herein a specific preferred embodiment of the invention. This description is an exemplification of the principles of the invention and is not intended to limit the invention to the particular embodiment illustrated. 
         [0051]    In the present application, the designations “top” and “bottom” relate to the alignment of the closure system when it is screwed onto a bottle with a teat, the bottle is vertically aligned and its bottom is resting on a base, and the nipple is located above the bottle. 
         [0052]    According to  FIG. 1 , a closure system  20  having a bottom closure ring  30  and a top closure ring  100  is screwed onto a bottle  10  for baby food. A nipple  160  is screwed onto the closure system  20  by means of a threaded ring  150 . 
         [0000]    According to  FIG. 2 , the lower closure ring  30  has a substantially cylindrical lower casing portion  31  having a plurality of sections. The first bottom shell section  32  with the substantially cylindrical shape has an inner thread  33  on the inner circumference. A second, bottom shell section  34  extends radially outward and downward from the bottom shell section  32 . 
         [0053]    In addition, the bottom shell part  31  has a third, bottom shell section  35  that is substantially disc-shaped and projects radially inward from the top edge of the first, bottom shell section  32 . A substantially cylindrical, fourth bottom shell section  36  projects radially upward from the inside of the third, bottom shell section  35 . 
         [0054]    A bottom partition wall  37  is connected to the top edge of the fourth, bottom shell section  36  and substantially blocks the cross-section of the bottom closure ring  30 . This disc-shaped partition wall  37  has a substantially flat first top side  38  and a substantially flat first bottom side  39 . In addition, it has diametrically opposing flow holes  40 ,  41  that extend from the first top side  38  to the first bottom side  39 . Furthermore, it has diametrically opposing cutouts  42 ,  43  that also extend from the first top side  38  to the first bottom side  39 . 
         [0055]    The flow holes  40 ,  41  and cutouts  42 ,  43  each have a curved side  44 ,  45  that runs concentric to the perimeter of the disc-shaped partition wall  37 . Furthermore, they have a short and a long a linear side  44 ,  47  and  48 ,  49 , where the linear side extends toward the center of the partition wall  37 . Small radii  50 ,  51  are between the curved and the linear sides, as well as between the linear sides. 
         [0056]    The long sides  48  of the flow holes  40 ,  41 ,  42  are arranged parallel with each other, and the short sides of the flow holes  40 ,  41  are arranged parallel with each other. The long and short sides  49 ,  47  of the cutouts  42 ,  43  are correspondingly aligned. 
         [0057]    Consequently, the flow holes  40 ,  41  and the cutouts  42 ,  43  widen at an increasing distance from the center of the partition wall  37 . 
         [0058]    The focal points of the flow holes  40 ,  41  are diametrically opposed, as are the focal points of the cutouts  42 ,  43 . 
         [0059]    The cutouts  42 ,  43  are covered by sealing cushions  52 ,  53  that are connected at the edge to the first top side  38 , providing a seal. The sealing cushions  52 ,  53  have a contour that corresponds to the contour of the cutouts  42 ,  43 . The sealing cushions  52 ,  53  each have an edge region  54 ,  55  where the wall is thicker, and a central region  56 ,  57  where the wall is thinner. 
         [0060]    An individual hollow conical sealing lip projects from the edge of the first top side  38  of the partition wall  37 . The sealing lip  58  is concentric with the partition wall  37  in the bottom shell part  31 . The outer diameter of the sealing lip  58  increases at an increasing distance from the partition wall  37 . 
         [0061]    Furthermore, the bottom closure ring  30  has a disc-shaped sealing element  59  on the bottom side of the third, bottom shell section  35 . 
         [0062]    A layer  60  that consists of a soft elastic sealing material and does not cover the flow holes  40 ,  41  is arranged on the first top side  38 . On the edge, the peripheral sealing lip  58  projects from this layer, and the sealing cushions  52 ,  53  project above the cutouts  42 ,  43 . The sealing lip  58  and the sealing cushions  52 ,  53  are formed as a single part with the layer  60 . Furthermore, the layer  60  of soft elastic sealing material is connected to the disc-shaped sealing element  59  via connections made of the same material. These connections extend through cutouts in the curved sides  44  of the flow holes  40 ,  41  and channels in the bottom side of the partition wall  37  and the inside of the fourth bottom shell section  36 . 
         [0063]    Furthermore, on the outer perimeter of the first bottom shell section  32 , the bottom closure ring  30  has four opposing lengthwise grooves  61 ,  62 ,  63 ,  64  that are each connected to an ring groove  65 ,  66 ,  67 ,  68  that are bordered at the bottom by the second bottom shell section  34 . Neighboring the lengthwise grooves  61 ,  63  is a starting region  69 ,  70  at a downward angle in the ring grooves  65 ,  67 . This is formed by a rib  71 , 72  boarding the top of the ring groove  65 ,  67 . In addition, the bottom of the lengthwise groove  61 ,  63  is bordered by a ramp  73 , 74  that is angled corresponding to the rib  71 , 72 . 
         [0064]    On the base of the ring grooves  65 ,  67 , small bumps  73 . 1 ,  74 . 1  that project radially outward are arranged next to the lengthwise grooves  61 , 63 . These each have a slightly angled ramp  73 . 11 ,  74 . 11  and a strongly angled ramp  73 . 12 ,  74 . 12 . The slightly angled ramps  73 . 12 ,  74 . 12  face the neighboring lengthwise grooves  61 ,  63 . The strongly angled ramps  73 . 12 ,  74 . 12  face away from the neighboring lengthwise grooves  61 ,  63 . 
         [0065]    The two starting regions  69 ,  70  angle downward. Adjacent thereto, the ring grooves  65 ,  67  run in a ring on the first bottom shell section  32  like ring grooves  66 ,  68 . 
         [0066]    The ring grooves  66 ,  68  are delimited at the ends by stops  75 ,  76  that also separate them from the neighboring lengthwise grooves  61 ,  62 ,  63 ,  64 . 
         [0067]    Furthermore, the bottom closure ring  30  on the perimeter of the second bottom shell section  34  has a partially peripheral groove  77  that opens upward. This begins next to the lengthwise groove  61  and extends approximately to the middle of the ring grooves  66 . The ends of the groove  77  that opens upward are rounded. At a distance of approximately 30 to 40 angular degrees from the end neighboring lengthwise groove  61 , the second bottom shell section  34  is provided with a marking  78  (“Open”) next to the open groove  77  for an open position, and at the other end with another marking  79  (“Close”) for a closed position. 
         [0068]    Diametrically opposed to the open groove  77 , a nib  80  projects radially outward from the first, bottom shell part. The nib  80  has two concave side surfaces  81 ,  82  rounded on the outside. 
         [0069]    The bottom closure ring  30  is made of a hard elastic plastic such as polypropylene (PP). Production preferably occurs by means of injection molding. The sealing lip  58 , the sealing cushions  52 ,  53 , the sealing element  59  and the soft elastic layer  60  are formed by injection molding soft elastic sealing material. Since the projecting sealing elements are connected to each other, the sealing material can be injection molded in a single injection molding step. The sealing material is preferably a thermoplastic elastomer (TPE) or an injectable silicone rubber. 
         [0070]    According to  FIG. 3 , the top closure ring  100  has a top shell part  101  with a plurality of sections. A substantially cylindrical, first top shell section  102  has an outer thread  103  on the outer perimeter. The first top shell section  102  is connected at the bottom edge to a second top shell section  104  that projects radially outward. In the example, the second top shell section  14  is in the shape of a hollow cone. It can contrastingly be disc-shaped. The second, top shell section  104  is connected at the outer perimeter to a third top shell section  105  that projects axially downward. 
         [0071]    The third top shell section  105  is substantially cylindrical. It has an inner perimeter and four hooks  106 ,  107 ,  108 ,  109  that project radially inward, where the wider hooks  106 ,  108  and the narrow hooks  107  and  109  are diametrically opposed to each other. The hook  107  is offset from hook  106 , and the hook  109  is offset from the hook  108  by approximately 70 angular degrees in a peripheral direction. 
         [0072]    In addition, the third top shell section  105  has an approximately semicircular tongue  110  that projects axially downward. Next to the tongue  110 , the hook  106  projects radially inward from the third top shell section  105 . 
         [0073]    In addition, the top closure ring  100  has a disk-shaped top partition wall  111  that is connected to the first top shell section  102  slightly below its top edge and blocks the cross-section of the top shell part  101 . The top partition wall  111  has a substantially flat second top side  112  and a substantially flat second bottom side  113 . 
         [0074]    In addition, it has diametrically opposed top through holes  114 ,  115  that each end in the second top side  112  and the second to bottom side  113 . The top through holes  114 ,  115  diametrically oppose each other. They have a curved side  116  that runs concentric to the perimeter of the top partition wall  111 . In addition, they have a short, straight side  117  and a long straight side  118  that extend from the ends of the curved side  116  proceeding from the center of the partition wall  111  where they meet. There are small curvature radii  119  between the curved sides  116  and the straight sides  117 ,  118  and between the straight sides  117 ,  118 . The long sides  118  of the through-holes  114 ,  115  are parallel to each other as are the narrow sides  117 . The focal points of the through-holes are arranged approximately in a diametrically opposed manner. The shape of the flow-holes of the top closure ring  100  is complementary with the shape of the flow-holes  40 ,  41  of the bottom closure ring  30 . 
         [0075]    At the edge of the through-holes  114 ,  115 , sealing beads  120 ,  121  project downward from the second bottom side  112 . The sealing beads  120 ,  121  each run around the through-holes  114 ,  115 . 
         [0076]    The inner parameter of the first top shell section  102  has a hollow cylindrical sealing area  122  directly below the top partition wall  111  where the inner diameter of the top shell part  101  is smallest. The inside of the sealing area  122  forms a sealing surface  123  for the lip seal. A conical transitional region  124  abuts the bottom of the sealing area  122  at which the inner diameter of the top shell section  102  gradually expands downward. Abutting the conical transitional section is a cylindrical insertion area  125  at which the diameter of the first top shell section  102  is widest. 
         [0077]    The top closure ring  100  is always made of a hard elastic plastic such as PP. It is preferably produced by means of injection molding. 
         [0078]    The hooks  106 ,  107 ,  108 ,  109  of the top closure ring  100  can be inserted into the lengthwise grooves  61 ,  62 ,  63 ,  64  of the bottom closure ring  30  until the hooks  106 ,  108  contact the ramps  73 ,  74  on the top side of the second bottom shell section  34 . The sealing lip  58  thereby engages in the insertion area  125  on the inside of the first top shell section  102 . Furthermore, the tongue  110  engages in the open groove  77  from above. The closure parts  30 ,  100  in  FIG. 4  are shown in this assembled position in which a gap is visible between the third top shell section  105  and second bottom shell section  34 . 
         [0079]    In this assembled position, the top closure part  100  is not yet undetachably connected to the bottom closure part  30 . 
         [0080]    For an undetachable connection, the top closure part  100  is rotated out of the assembled position relative to the bottom sealing part  30 . The hooks  106 ,  108  are moved thereby along the downward angled starting regions  69 ,  70  of the ring grooves  65 ,  67 , and the sealing lip  58  is shifted along the transitional region  124  toward the sealing surface  123 . Each point of the sealing lip  58  is thereby shifted along a helical line. Due to the reduction in the diameter, the sealing lip  58  is pretensioned radially. When the hooks  106 ,  108  enter the annular part of the ring grooves  65 ,  67 , the sealing lip  58  is radially pretensioned against the sealing surface  123 . 
         [0081]    While being screwed into the ring grooves  65 ,  67 , the hooks  106 ,  108  first slide across the slightly angled ramps  73 . 11 ,  74 . 11  toward the bumps  73 . 1 ,  73 . 2 . The third top shell section  105  is thereby elastically expanded radially in a diametrical direction by the two hooks  106 ,  108 . When the hooks  106 ,  108  go past the strongly angled ramps  73 . 12 ,  84 . 12  of the bumps  73 . 1 ,  74 . 1 , the third top shell section  105  retracts slightly. This creates a safety lock. In this rotational position, the two flow openings  114 ,  115  of the top closure ring  100  are arranged to precisely overlap above the flow openings  40 ,  41  of the bottom closure ring  30 . In addition, the tongue  110  points toward the markings  78  that indicate the open state. This situation is shown in  FIG. 5 . In this position, liquid can pass through the bottom and top partition walls  37 ,  111 . 
         [0082]    When the top closure ring  100  is rotated further in the same direction, the hooks  107 ,  109  finally reach the end stops  73 ,  76  in the ring grooves  66 ,  68 , and the time  110  reaches the end of the top open groove  77 . In this rotational position, the reinforced edge areas  54 ,  55  of the sealing cushions  52 ,  53  precisely press against the beads  120 ,  121  on the bottom side of the top flow openings  114 ,  115 . The top flow openings  114 ,  115  are thereby sealed. In this situation which is shown in  FIG. 6 , the tongue  110  points toward the marking  79  on the bottom closure ring  30  that indicates the closed position. 
         [0083]    To reach the open position, the top closure ring  100  is rotated in the opposite direction until the tongue  100  points toward the corresponding marking  78 . 
         [0084]    To disassemble, the top closure ring  100  is rotated further in the same rotational direction, wherein the hooks  106 ,  108  first need to be moved with slightly elevated force over the steep ramps  73 . 12 ,  74 . 12  of the bumps  73 . 1 ,  74  which releases the safety lock. When the hooks  106 ,  108  are guided over the ramps  73 ,  74  to the lengthwise sides  61 ,  63 , the sealing lip  58  is moved out of the sealing area  122 . When the hooks  106 ,  107 ,  108 ,  109  completely engage in the lengthwise grooves  61 ,  62 ,  63 ,  64 , the top closure ring  100  can be withdrawn from the bottom closure ring  30 . 
         [0085]    According to  FIG. 1 , the closure system  30 ,  100  with the inner thread  33  in the bottom closure body  30  is screwed onto a bottle outer thread  11  on a neck  12  of the bottle  10 . The sealing element  59  presses against the top edge of the neck  12  that surrounds the bottle opening. This causes the bottom closure ring  30  to be tightly seated on the bottle  10 . 
         [0086]    In addition, the teat  166  is clamped with a nipple flange  161  between the top edge of the top closure ring  100  and the threaded ring  130  that is screwed onto the outer thread  103  of the top closure ring  100 . The nipple  160  is thereby tightly connected to the top closure ring  100 . 
         [0087]    By adjusting the closure system  30 ,  100  in the open position, liquid baby food can be ingested from the bottle  10 . By adjusting the closure system  30 ,  100  in the closed position, removal is prevented. In all positions, the lip seal  58 ,  123  ensures that liquid can not exit laterally between the top and bottom closure ring  30 ,  100 . At the same time, the sealing lip  58  can ensure that the teat  160  is ventilated in that it lifts at least partially from the sealing surface  123  starting at a specific vacuum in the teat  160  so that a gap can arise between the sealing lip  58  and the sealing surface  123 . This preferably occurs independently in the area that is not touching liquid since this is where the highest vacuum exists. Therefore no liquid leaks during ventilation by means of the sealing lip  58 . 
         [0088]    This completes the description of the preferred and alternate embodiments of the invention. Those skilled in the art may recognize other equivalents to the specific embodiment described herein which equivalents are intended to be encompassed by the claims attached hereto.