EP0850177B1 - Self-closing seal with a sealing membrane - Google Patents

Abstract

PCT No. PCT/EP96/03906 Sec. 371 Date Apr. 16, 1998 Sec. 102(e) Date Apr. 16, 1998 PCT Filed Sep. 5, 1996 PCT Pub. No. WO97/09245 PCT Pub. Date Mar. 13, 1997The invention relates to a self-closing closure with a closure cap (1), with a through-passage opening (8) formed in the closure cap (1), and with a closure membrane (2), assigned to the through-passage opening (8), the closure membrane (2) having a bottom retaining border (3) and a top, essentially concave closure head (5), the closure head (5) and the retaining border (3), furthermore, being connected by a connecting wall (4), and, for the purpose of achieving a solution which is favorable in terms of both usage and production, proposes that a widened region (9) adjoins the through-passage opening (8) towards the outside, that the closure head (5) is arranged in the widened region (9), and that the connecting wall (4) extends into the widened region (9), passing through the through-passage opening in the process.

Description

The invention relates to a self-closing closure with one cap, one in the cap trained through opening and assigned to the through opening arranged membrane according to the features of the preamble of claim 1.

Such closures are already known from EP-A-0 545 678 known. However, it did Disadvantages shown in use in that either insufficiently reliable closure achieved or the required ventilation is such Vacuum requires that with conventional squeeze bottles, which are provided with a closure, for example, no sufficient negative pressure develops or that Restoring forces are so strongly provided in the squeeze bottle need to be used for normal purposes are not very suitable.

In view of the state of the art described above the invention deals with the technical Problem, a more convenient self-closing Specify closure. It is also aimed at one to achieve a cheap closure. In addition, the cheapest possible installation sought. The invention also deals with the technical problem, one for the closure mentioned to specify advantageous sealing membrane.

The object is achieved with a self-closing closure in accordance with the features of independent claim 1.

In the subject of claim 1 focused on that the sealing membrane in unactuated installation condition a lower bracket edge and an upper one that is substantially concave Has a closure blanket, the closure blanket further and the bracket edge through a connecting wall are connected. It is also preferred that the installation state the sealing membrane by turning the Sealing membrane after an injection molding process is reached. This results in strength beneficial effects. In particular the concave trained blanket is on the one hand in their Closure state due to radially acting forces of inverted connecting wall advantageously biased. On the other hand, it is also a quick opening, especially for ventilation, when vacuuming. The connecting wall can preferably go further from an edge connection to the closure ceiling, still based on the installed state, in a Retraction below a projection surface of the shutter ceiling continue. This is particularly because of this achieved, as explained in more detail below, that the cover in the manufacturing state (sprayed state) essentially cylindrical, starting from the cover blanket. However, this can vary according to the desired properties of the sealing membrane also a variation with regard to a conical design be made. The continuation in one Retraction below the projection surface of the ceiling creates a goblet-like design the closure membrane in this area as a whole. There are also use cases in which the connecting wall is also in the installed state essentially cylindrical below and in Connection to the blanket extends. This too especially when the inversion mentioned is not made after the manufacturing process. in the individual is particularly described in relation to the upside down installation condition is advantageous that the Breech blanket has a greater thickness at the edge than the boundary wall. The cover blanket can starting from its edge area continuously rejuvenate inside. The boundary wall is regarding an edge of the cover blanket which appears in cross section the sealing membrane in an upper area connected - again based on the installed state - And a lower free edge area of the edge the closing ceiling is overlaid by the boundary wall. Because of the described, advantageously set, towards a center of the blanket directed compressive forces achieved by a certain forced expansion of the elastic material of the Sealing membrane, in particular the connecting wall, is essentially on the edge of the blanket a radially inward over the entire circumference directed force exerted. Due to the vaulted Extending the breech cover will also force these forces caught the cheapest. Due to the prevailing radial forces and the resulting prestress in the sealing membrane and in particular the cover of the Sealing membrane are further advantageous properties reached when actuating the closure membrane. The this leads to pre-tension in the vault structure the sealing membrane ensures a high one Sealing force, but on the other hand occurs in the event of a fault the vault structure (dispensing process or suction) also a breakout with relatively little force out. With a normal donation process opening the preferred in the cover blanket provided radial opening slots from a certain Reliable and almost instantaneous printing. at a termination of a donation process and a reset process the squeeze bottle on which the closure applied, for example, results in in a conventional manner retraction of the closure cover to the initial concave state and then a breakthrough down with an air suction, which despite the described, prevailing in the cover blanket Tensions not a major one, but rather one requires less effort or negative pressure. In a further advantageous embodiment, it is also provided that that the connecting wall in the spray state in runs essentially cylindrical. As already mentioned can be changed by changing the angle in the Connecting wall (in a cross-sectional view), however also the described, in the upturned state itself resulting prestress on the cover blanket or a Funnel formation can be influenced and varied. In a further advantageous embodiment provides that the connecting wall in a circumferential reinforcing ring passes and that on the reinforcing ring Fastening ring is tied. The reinforcement ring has proven to be particularly advantageous in relation to on a telescopic extension of the closure membrane when pressure builds up, as detailed below described. The mounting ring is used for mounting the closure membrane in the closure. In another preferred detail it is provided that the fastening ring about an angled in cross section to the Connecting wall extending connecting wall with the Reinforcement ring is connected.

With regard to the closure, it is also particularly preferred that to the outside after that in the cap trained through opening an extension area is formed in the cap and that the closure blanket is assigned to the closure membrane is arranged to this extension area. The connecting wall can enforce the through hole (seen from below) to the extension area extend. It is not essential here required that the connecting wall at rest of the closure lies against the extension area. It usually occurs during a donation process a contact of the connecting wall with the extension area, which is described in detail below advantageous balance of forces and influence, usually to support the opening process is connected in the blanket. The arrangement of the closure cover according to the invention in the Extension area initially means that the Cover down some support, but optionally also experienced radially laterally. moreover is the through the extension area or the passage opening given below the blanket Rejuvenation in the sense of a positive fit of the Sealing membrane advantageous. It is an easy one Assembly of the sealing membrane possible. A glue in or the like is not required. Nevertheless owns the blanket has sufficient freedom of movement, in order to advantageously carry out a dispensing process. The The blanket itself can be made comparatively thin his. Nevertheless, due to the concave design and the radially inward support in Extension area a comparatively high locking force given which reliably a complete Closing the dispensing opening. This Influencing or supporting the closing force and hence also the opening characteristics of the sealing membrane can be used alone or in combination with the one described above, to be achieved by turning the sealing membrane inside out Influencing may be provided. In particular, can the blanket with, starting from a center, formed in the radial extending slots his. The slots are at rest Closing membrane completely closed, by pressing the slot boundary sides against each other. at Actuation of the vessel on which such a closure is applied, the blanket is after pressed on the outside and an opening by gaping the slots reached. In combinative or alternative Design can also be provided that the Cover has a central permanent opening, wherein a support plate is formed below the opening is on which the blanket at rest sits sealingly, so that even in this embodiment complete closure at rest is achieved is. In more detail regarding this Backing plates also made reference to that Pre-published German patent application 19 51 007 and the international patent application PCT / EP95 / 01104. The disclosure of these older applications will also for the purpose of using them in claims of this application to be included in the disclosure of the present application including. In a further embodiment provided that in an outer area of the closure cover an edge bead protruding beyond the cover blanket is formed is. Such a bead, which, however, in In the idle state, the passage opening is not towered over taken on its own from the already mentioned EP-A2 545 678 for a comparable sealing membrane known. However, is within the scope of the present invention provided that the bead in the area of the extension area and thus outside the through opening is arranged. The fact that the edge bead in Area of the extension area is arranged at the same time that this bead turned outwards and is thus exposed upwards. There is also a support of the bead downwards or a radial support given. This can be used in For the purpose of a transport lock, a cover or the like. To provide, which acts on the edge bead. Holding the edge bead is not only the blanket to a certain extent on one Opening movement prevented, but above all, due to the softness of the material of the closure membrane an advantageous seal in the transport state to reach. Due to an increased internal pressure, which possibly in the course of a transport with appropriate Pressure on the container can cause the sealing effect also reinforced. It is also suggested that below the through hole, immediately following this, another - another - in opposite directions opening expansion area is formed. one or both of the extension areas mentioned can be in be essentially conical. Here results a double rivet-like training the sealing membrane used and a corresponding advantageous mounting of the closure membrane in the cap. In a preferred embodiment it is envisaged that in the extension area, which faces outward through the through opening connects, one reaching to the through opening groove-like recess is formed. The deepening is preferably vertical or radial. This allows advantageous ventilation, for sucking in air after a dispensing process into the container. The air flows here through one of the extension area or the passage opening formed and through the connecting wall covered channel. There can also be corresponding air openings as holes or channels only in the wall the extension area or the passage opening be trained. The sucked air leads in Area of the bead to lift off.

Fig. 1

einen Querschnitt durch eine Verschlußkappe mit einer Verschlußmembran in einer ersten Ausführungsform, geschnitten entlang der Linie I-I in Fig. 3;

Fig. 2

den Verschluß gemäß Fig. 1 in vergrößerter Darstellung;

Fig. 3

eine Darstellung des Verschlusses gemäß Fig. 1, in einer Draufsicht;

Fig. 4

den Verschluß gemäß Fig. 1 im Ausgabezustand;

Fig. 5

eine Darstellung des Verschlusses gemäß Fig. 1 mit einer Transportsicherung;

Fig. 6

eine Querschnittsdarstellung durch eine Verschlußkappe mit einer Verschlußmembran einer weiteren Ausführungsform;

Fig. 7

eine Darstellung gemäß Fig. 1, wobei ein Stützteller vorgesehen ist;

Fig. 8

eine Darstellung gemäß Fig. 5, gleichfalls mit Ausbildung eines Stütztellers;

Fig. 9

eine Unteransicht einer Verschlußmembran;

Fig. 10

die Verschlußmembran gemäß Fig. 9, geschnitten entlang der Linie X-X in Fig. 9, mit einem im Querschnitt dargestellten zugeordneten Einbauring;

Fig. 11

eine Draufsicht auf den Gegenstand gemäß Fig. 9 bzw. 10;

Fig. 12

eine Ausschnittsvergrößerung aus der Darstellung gem. Fig. 10,nach Zusammensetzung mit dem Einbauring;

Fig. 13

eine Einbaudarstellung des Gegenstandes gemäß den Fig. 9 bis 12 in einem Verschluß, im unbetätigten Zustand;

Fig. 14

eine Darstellung gemäß Fig. 13, nach Erhöhung eines Innendruckes in dem mit dem Verschluß versehenen Behältnis, jedoch vor Beginn eines Spendevorganges;

Fig. 15

den Verschluß gemäß Fig. 13 im Spendezustand;

Fig. 16

den Verschluß gemäß Fig. 13 nach Beenden eines Spendevorgangs und beim Rücksaugen von Luft;

Fig. 17 bis 20

entsprechende Darstellungen gemäß Fig. 13 bis 16, bei einem weiteren Einbaubeispiel;

Fig. 21 bis 23

entsprechende Darstellungen gemäß Fig. 13 bis 16, bei einem dritten Einbaubeispiel;

Fig. 24

ein weiteres Einbaubeispiel bei einem Tubenverschluß;

Fig. 25

eine Darstellung gemäß Fig. 21 bis 23, mit einem Originalitätssiegel;

Fig. 26

eine Draufsicht auf den Verschluß im Bereich der Verschlußöffnung, nach Entfernen des Originalitätssiegels und Entnahme der Verschlußmembran;

Fig. 27

eine weitere Ausführungsform.

The invention is further explained below with reference to the accompanying drawing, which, however, only represents exemplary embodiments. Here shows:

Fig. 1

a cross section through a closure cap with a closure membrane in a first embodiment, cut along the line II in Fig. 3;

Fig. 2

the closure of Figure 1 in an enlarged view.

Fig. 3

a representation of the closure of Figure 1, in a plan view.

Fig. 4

the closure of Figure 1 in the output state.

Fig. 5

a representation of the closure of Figure 1 with a transport lock.

Fig. 6

a cross-sectional view through a closure cap with a closure membrane of a further embodiment;

Fig. 7

a representation of Figure 1, wherein a support plate is provided.

Fig. 8

a representation of FIG 5, also with the formation of a support plate.

Fig. 9

a bottom view of a closure membrane;

Fig. 10

9, cut along the line XX in FIG. 9, with an associated mounting ring shown in cross section;

Fig. 11

a plan view of the object of Figures 9 and 10;

Fig. 12

an enlarged section from the representation acc. Fig. 10, according to the composition with the mounting ring;

Fig. 13

an installation view of the object according to Figures 9 to 12 in a closure, in the unactuated state.

Fig. 14

a representation according to FIG 13, after increasing an internal pressure in the container provided with the closure, but before the start of a dispensing process.

Fig. 15

the closure of Figure 13 in the donated state.

Fig. 16

the closure of Figure 13 after completing a dispensing process and when sucking back air.

17 to 20

corresponding representations according to FIGS. 13 to 16, in a further installation example;

21 to 23

corresponding representations according to FIGS. 13 to 16, in a third installation example;

Fig. 24

another installation example for a tube closure;

Fig. 25

a representation according to Figures 21 to 23, with an originality seal.

Fig. 26

a plan view of the closure in the region of the closure opening, after removal of the tamper-evident seal and removal of the closure membrane;

Fig. 27

another embodiment.

Is shown and described initially with reference to Fig. 1 shows a self-closing closure with a closure cap 1 and a sealing membrane 2, the Cap 1 is only partially shown. The Cap 1 is further - which is not in detail is shown - part of a fluid output Compressible container.

The closure membrane 2 has a lower, all-round Bracket edge 3, one of the bracket edge 3 essentially upwardly extending connecting wall 4 and an upper blanket 5. In the blanket 5 are starting from a center point themselves radially extending slots 6, 7 formed (see also Fig. 3).

It is essential that the closure cap 1 has a through opening 8 forms, which is outward in Form of an extension area 9 expanded. The passage opening 8 is in the narrowest area of the total delivery opening to see. The connecting wall 4 passes through the Through opening 8 and is, at least when actuated, radially supported in the extension area 9.

The connecting wall 4 continues via an upper, circumferential edge bead 10 forming connection curvature in the blanket 5 over. The blanket 5 is with a larger, in the exemplary embodiment formed two to four times the thickness compared to the connecting wall 4. The thickness is different, since the blanket 5 tapers towards its center. They are also radial on their inner surface outside bevels 11 formed.

The extension area 9 is conical. On Cone angle alpha is approximately 15 to 40 °. Prefers is a cone value of approx. 25 °.

1 to 3 and 5 to 8 is the unactuated State shown. In the actuation state according to Fig. 4 is by, for example, squeezing the vessel which the cap 1 is attached (which in individual is not shown) the product pressurized and so presses against the inner surface the blanket 5. The blanket 5 breaks Reduction of the cone pressure or the pressure of the sealing membrane 2 exerts radially on the conical surface 9 and a neutralization of the bias in the Center open, gaping out segment-like membrane lobes the sealing membrane, so that there is a donation opening 12 results. This behavior is basically with all illustrated embodiments are the same. When the pressure on the container decreases, it closes the cap, the cap membrane is regarding the cover blanket pulled down or pulled back and experiences through the support on the cone surface a narrowing. There is a kind of squeezing in the - upper - conical surface. The membrane lobes experience a vertical downward deflection, so that they follow the slight internal pressure gap open below and for good - if necessary additional - provide ventilation of the container.

With regard to the arrangement of the sealing membrane 2 in the cap 1 is still important that the Gusset 17 between the connecting wall 4 and the closure blanket 5 arranged above the through opening 8 are. The blanket 5 is also preferred overall arranged above the through opening 8. On Taper dimension a of the dispensing opening, starting from the Through opening 8 to that of the connecting wall 4 largest area of the extension area still in use 9, is a multiple of the thickness of the connecting wall 4. Preferably about four to ten times the thickness of the connecting wall 4.

From the top view of FIG. 3 it can be seen that in the expansion area 9, but also enforcing the Through opening 8, ventilation grooves 13, 14, etc. formed are. As a result, when sucking back - if necessary additionally - air sucked into the vessel be, the bracket edge 3 at least locally from its support on the cap 1, in which Area indicated by reference number 15 is taking off. The air intake can be in addition to the already mentioned ventilation due to upper cone support and there may be formed grooves.

The bead 10 is important, especially in With regard to a transport lock, as shown in Fig. 5 is shown. The transport lock consists of a lid 15, which has a circular underside trained sealing bead 16. The sealing bead 16 acts in the closed state with the edge bead 10 together. This is not just the top cover 5 in their movement with regard to the Taking an open position according to FIG. 2 is essential is hindered, rather by the internal pressure, which the contact pressure could lead to an output of mass in the region of the bead 10 on the closure lid 15 only reinforced and thus increases the sealing effect, because the print is immediately inside, in the gusset 17, cf. Fig. 2, pending. Because of the concave shape the blanket 5 in the closed state, preferably by the inversion already described Seal membrane 2 reached after manufacture, reinforce the internal pressure and the system the bulge 10 impedes the expansion, the vault forces, so that the sealing effect in the adjacent flanks the slits in the top cover are even reinforced. The cone constraint of the closure membrane leaves the Shape the membrane base (reinforced) into a convex shape. By the Closure lid will also be a reinforced squeeze reached in the conical surface. This makes a vertical one Opening force, which is due to excessive internal pressure from the inside of the container onto the cover acts, a deflection radially outwards and interception by the cover or Cone wall achieved. As a result, the membrane lobes expressly block yourself from opening and prevent product leakage. The cavity between the sealing cap and the sealing membrane remains hygienically clean. The state of self-locking due to the cone support also in somewhat reduced scope after opening the Closure cover and thus prevents in the normal state the product leakage, especially in the case of an overhead arrangement of the relevant, provided with the closure Vessel.

In the embodiment according to FIG. 6, the closure cap is on the inside only with one outer extension area 9 is formed. The passage opening 8 represents the narrowest area of the expansion area 9. In contrast to the embodiment 1, where below the through opening 8 another inner opposite extension area 9 'connects, the connecting wall 4 at 5 free-spanning, however likewise expanding conically, following one more small strongly conically expanding system on the Closure wall below the through opening 8 after pulled radially outside and engages behind the bracket edge 3 a separate mounting projection 18, which from the top cap 19 of the cap 1 protrudes downwards. This bracket web 18 is closed all round, cylindrical, formed.

7 and 8 is the Sealing membrane 2 with a central, always open Opening 20 formed. The opening 20 is on the underside underpinned by a support plate 21, which in any case the diameter or the cross section of the opening 20 is adapted, he being the measure of Opening surpasses. This type of sealing membrane 2 enables a much easier dispensing again of product from one with such a closure provided vessel. This can be especially for adjustment different viscosities. The Opening 20 is only sealed in the closed position. In addition to the opening 20 can also radial slots, as explained with regard to FIG. 1, be trained. Because of the special described Geometry of the closure membrane remains during normal Use in all illustrated embodiments, in the case of a dispensing process, the upper bead 10 in almost unchanged position. The blanket 5 forms in the sense of a certain stretch Internal pressure and then the membrane lobes gap like already described and release the product route. The optically well recognizable elastic changes in the sealing membrane before the actual product outlet signal a user of the upcoming Product outlet. This evaluates the handling and the Use of such a closure and such Sealing membrane significantly. The closure and the The area of the sealing membrane remains even after a longer period Usage time clean, because of this expansion effect the product exit point the closure surface can exceed.

A support as shown in FIGS. 7 and 8, can also be provided in the modification that the Support is designed as a support ring, which just moving back, triggered by a Suck back, the sealing membrane in the storage room prevents. The support ring can be used with such Be designed diameter that outside of Support 6.7 supports the membrane. This ring can also but also be designed so that it additionally a shutter function with respect to a slot or a central opening, as explained above, with met.

The closure membrane is in all embodiments made of a soft, easily deformable plastic material.

With reference to Figures 9 to 12 is a closure membrane 2 recognizable with a blanket 5 and a Connecting wall 4. The closing ceiling 5 is towards the middle tapering in cross-section, starting out from an edge edge 23. An inner radius is R1 smaller than an outer radius R2, which two radii - alone - generate the geometry of the blanket 5.

Connects to the connecting wall 4 - on the upper side in FIG. 10 - A reinforcing ring 24. This reinforcement ring extends in the sprayed state of the closure membrane 2, which is shown in FIGS. 9 to 12, essentially inside. It forms a top Support bearing surface 25 from. This support surface runs approximately horizontally, d. H. essentially rectangular to a direction of extension of the connecting wall 4th

On the connecting wall 4, in the embodiment in Area of the reinforcing ring 5, is also a fastening ring 26 connected. The mounting ring 26 is basically with the mounting ring described above 3 comparable. The connection of the fastening ring 26 is made via a connecting wall 27. The connecting wall 27 extends with respect to the Connecting wall 4 to the outside. In the embodiment the direction of extension is chosen such that it with a vertical V encloses an acute angle beta. The connection wall is in further detail 27 connected to an intermediate wall 28. The arrangement is essentially in a cross section Z-shaped, with the Z-dash (however here not straight, but straight or vertical) the intermediate wall 28 forms which essentially extends vertically. This is followed by a horizontal wall merging into the fastening ring 26 29 connected.

From the horizontal wall 29 or the fastening ring 26 connecting cams 30 are directed downward.

These connecting cams 30 are used for positive locking Assembly with a mounting ring 31. The importance of Installation ring 31 is explained further below.

While the sealing membrane is made of a soft silicone material or an elastomeric plastic material that is also comparatively soft, there is Installation ring 31 made of a normal hard plastic material. In that, as in the exemplary embodiments shown, the horizontal wall 29 and the mounting ring 26 an upper substantially horizontal extending surface 32 is in the installed state given an advantageous seal. In the enlargement 12 is the assembled state the closure membrane 2 with the retaining ring 31st to recognize.

The connecting wall 27 is in the embodiment directly in the area of the connection of the reinforcement ring 24 connected to the connecting wall 4. to Reinforcement of the sealing membrane 2 in this area is also a circumferential reinforcing projection protruding outwards 33 trained. In the cross-sectional view this is shown as an oriel-like projection.

As can also be seen from FIGS. 9 and 11, the Sealing membrane 2 in the sealing cover 5, starting formed by a center point M with radial cuts 34, which result in the use of donations. In further detail can also be seen that assigned to the center M in the area due to a dilution of the radial lobes resulting in membrane lobes 35 is formed. This is advantageous in terms of on ventilation after a donation process. The The tips of the membrane lobes bend even more easily out. In contrast, the sealing function is easy Internal pressure not significantly affected.

13 to 16 is a first installation example such a sealing membrane 2 shown. The dilution 35 is here, and also in the further exemplary embodiments, not realized. It can be seen that during the donation process, cf. 14 and 15, the horizontal surface 25 of the reinforcing ring 24 in Contact with a counter surface 35 in the closure cap 1 arrives. Due to the geometry of the sealing membrane shown 2 or, as preferably provided, at a manufacture of the closure membrane 2 with a Spray state according to FIGS. 9 to 12 and an everted Installation according to FIGS. 13 to 16, the Blanket 5 with the goblet-like blanket 5 connecting wall 4 vertically upwards, freed from the conical surface, the extension area 9. This lifting process is made essential by a Angle change between the connecting wall 27 and the Partition wall 28 reached. After creating area 25 on the surface 35 causes a further increase in the internal pressure opening the flaps so that it 15 of the closure membrane comes.

After the dispensing process has ended, the sealing membrane 2 due to the negative pressure in the connected Container moved back into the position shown in FIG. 16. The prevailing negative pressure causes a breakout the flap down, here too contribute the forces due to a touch and System of the blanket 5 on the connecting wall 4th and further by means of the connecting wall 4 in the Support wall 9 arise.

It can be seen that the connecting wall 4 in its Connection area with the blanket 5, due to the connection on the top in the closed state, a Edge bead 10 forms. This bead 10 is special also advantageous in terms of sealing for purposes of travel protection, as also below explained further below.

As already mentioned, the closure cap 1 has a conical or funnel-shaped extension area 9 on. This expansion area 9 also has on the underside, as a free end face, the contact surface 35. The closure cap 1 also points outwards from an upper, essentially flat closure wall 36 a cylinder projecting downwards Bracket wall 37 on. The bracket wall 37 is with lateral distance, radially outwards, to the Extension area 9 formed.

In the cylindrical mounting wall 37 is at Embodiment below a level of the end face 35, a bracket recess 38 is formed. This mounting recess 38 has an upper stop surface 39, one essentially vertical itself extending bracket wall 40 and a lower, after protruding bulge inside the bracket wall 40 41, which downwards through an extension has a run-up slope in the radial direction.

In this bracket recess 38 is the mounting ring 26 of the closure membrane 2 clamped. In detail such that the upper horizontal surface against the Surface 39 of the bracket recess 38 abuts. underside the foot surface of the retaining ring of the closure membrane 2 is the mounting ring 31 made of conventional hard plastic material arranged. The mounting ring 31 can, like already explained above, by connection with the Closing membrane 2 may be pre-assembled. The mounting ring 31 thus sits together in the mounting recess 38 with the fastening ring 26 of the closure membrane 2, a that a pressure of the horizontal surface of the fastening membrane 2 up against surface 39 of the Bracket recess is made. It is a tight fit given. By pressing the relatively soft Material of the closure membrane 2 is also a Sealing created advantageously in this area. In addition, it is a very efficient installation option given. The sealing membrane 2 with the pre-assembled Installation ring 31 only needs in the bracket wall 37 inserted from below and then pressed down become. Because of the ramp 42, the closure membrane moves 2 with the ring like a clip in the bracket recess one and is securely attached.

The described reinforcement ring 24, the opposite the fastening ring 26 also radially inwards in the fastening state, as can be seen, is offset reliable for the fact that the sealing membrane 2 during of normal operation are not sucked down can. Apart from the installation of the sealing membrane 2 in the extension area 9 results from the Reinforcement ring 24 a ring-like fixed constriction, which do not easily pass through the blanket can.

17 to 20 is another installation example shown, with only the differences the previous installation games are described.

It can be seen that with this installation game none Extension area 9 is provided. Rather, it is Closure opening 43 only in the thickness of the closure cover educated. The sealing membrane 2 sits with lateral distance, forming a circumferential In any case, gap, in the area of the closure opening 43 with respect to the bead 10, a. At the same time, the Closure wall of the closure opening 43 as a contact surface for the surface 25 when extending the closure membrane 2 in the course of a dispensing process, as shown in FIGS. 18 and 19 can be seen. The mounting recess in the mounting flange is correspondingly higher intended.

Otherwise, the same conditions result as described above, but the vigorously Support from the expansion area is no longer available. It is also important that both in the embodiment 13 to 16 as the embodiment of 17 to 20 and also those described below Embodiment of FIGS. 21 to 26 in the suckback state or ventilation condition a surface 25 'of the reinforcing ring 24 for contact with the connecting wall 4 comes. Together with one that also occurs in practice System of the blanket 5 in this state the connecting wall 4 and thus also on the surface 24 ' of the reinforcement ring 24 in this area, it comes to a gaping leverage regarding the flaps.

In the embodiment according to FIGS. 21 to 25 13 to 16 with respect to the support 9 comparable design provided. In detail however, there is a change in that the extension area 9 lobe-like individual elements 43 has. Those between the elements are essential 43 resulting spaces 44 (see also Fig. 26). The sealing membrane 2 is in the suckback state these openings 44 and there is slightly groove-like deformed. This continues up to the midpoint area or the area of the separating slots, whereby clearly supports the ventilation properties becomes.

24 is in cross section a tube closure shown. Here also arise comparable conditions, but with the difference that to the support area 9 which is essentially conical opening, as described, runs a cylindrical wall 45 about the same height in view to a height extension of the extension area 9, connects. With a height transfer the blanket 5 substantially parallel to itself itself (cf. e.g. movement of the closure cover in Fig. 17 and 18) the cover blanket lies on its outer edge, here with the bead 10 on the inner surface of the cylindrical Wall 45 on and moves relative to this. On the one hand, this means that an extension of the Sealing membrane as it were a wiping or stripping along the inner surface of the cylindrical wall 45 takes place. When retracting the sealing membrane In this respect, a wiping effect arises and also a suction effect. It is also bowl-like Shaped, in which possibly still remaining liquid can (initially) be caught. That I with a corresponding negative pressure, then on Sucking into the vessel can also be done with this a remaining emptying can be achieved.

In addition, in Fig. 25 is in the shutter opening a tamper-evident seal tied to tear-off bars 46 shown.

26 shows a top view of the closure according to FIG 25, with the tamper evident seal 46 and removed membrane 2.

The individual elements 43, which are the expansion area 9 comparable conical support for the sealing membrane 2 are recognizable. Furthermore also the gaps 44 mentioned.

27 is a support ring 47 shown, which the closure blanket 5 of the closure membrane 2 supports downwards in the installed state. The support ring 47 can have one or more Web 48 on an insert ring body 49, which on the Closure blanket or a protruding downward, the Extension area 9 forming flange 50 of the blanket is held in clips. The support ring 47 is in its diameter preferably at an extension the slots are oriented in the sealing membrane. It it is advisable to make the diameter slightly larger than the extension of the slots is enough. This support ring 47 provides particularly during the suckback process a similar effect as in connection with the other embodiments with regard to the Reinforcement ring described: there is a lever-like Power transmission through the internal pressure in the area the closing flap so that they open more easily.

In addition, this ring also provides its own separate Securing the installation position of the sealing membrane 2. A such a ring can in all other embodiments come into use.

There is also a separate proposal in integrating such a support ring immediately, in Two-component spraying process, on the sealing membrane to mold.

Claims (17)

1. Self-closing closure with a closure cap (1), a through-passage opening (8) formed in the closure cap (1) and a closure membrane (2) assigned to the through-passage opening (8), the closure membrane having a bottom fastening ring (26) and a self-closing top closure head (5) which is essentially concave and, in response to product pressure, capable of axial movement with respect to the retaining border between a lower rest position and an upper dispensing position, wherein the fastening ring (26) and the closure head (5) are connected by a connecting wall (4), the closure head (5) being circumferentially arranged at the top end of the connecting wall (4) and a further portion (27) of the closure membrane (2) being located between the connecting wall (4) and the fastening ring (26), characterized in that said further portion makes an acute angle to the closure axis, wherein said further portion is inclined downwards and inwards towards the product when the closure head is in its lower position and said further portion being movable in response to product pressure to an upwards and inwards inclined position when the closure head rises to its dispensing position.
2. Closure according to claim 1, characterized in that the closure head (5) is arranged in its lower position below the uppermost surface of the closure cap (1) and the closure head is arranged in its dispensing position above the uppermost surface of the closure cap.
3. Closure according to claim 1 or 2, characterized in that the closure membrane (2) has a surface (25) facing outwards which engages with the closure cap (1) before the closure head (5) is operated to dispense the product.
4. Closure according to one or more of the preceding claims, characterized in that a border bead (10) which projects beyond the closure head (5) is formed in an outer region of the closure head (5).
5. Closure according to one or more of the preceding claims, characterized in that the border bead (10) is arranged in the area of the widened region (9).
6. Closure according to one or more of the preceding claims, characterized in that a widened region (9') directly adjoins the through-passage opening (8) beneath the latter.
7. Closure according to one or more of the preceding claims, characterized in that a widened region (9, 9') is of conical design.
8. Closure according to one or more of the preceding claims, characterized in that a groove-like depression which reaches as far as the through-passage opening (8) is formed in the widened region (9, 9').
9. Closure according to one or more of the preceding claims, characterized in that the retaining border (3) is supported radially by the connecting wall (4).
10. Closure according to one or more of the preceding claims, characterized in that, in the non-actuated installed state, the closure membrane (2) has a bottom retaining border (3) and an essentially concave top closure head (5), the closure head and the retaining border, furthermore, being connected by a connecting wall (4).
11. Closure according to one or more of the preceding claims, characterized in that the installed state is achieved by turning the closure membrane (2) inside out after it has been produced by injection moulding.
12. Closure according to one or more of the preceding claims, characterized in that, starting from a borderside attachment to the closure head (5), the connecting wall (4) continues into a constriction beneath the projection area of the closure head.
13. Closure according to one or more of the preceding claims, characterized in that the connecting wall (4) adjoins the bottom of the closure head (5) in an essentially cylindrically extending manner.
14. Closure according to one or more of the preceding claims, characterized in that the border side of the closure head (5) is of a greater thickness than the boundary wall, the boundary wall is attached to a top region of a border edge, as seen in cross-section, of the closure head (5) and the boundary wall grips over a free bottom boundary region of the boundary edge of the closure head (5).
15. Closure according to one or more of the preceding claims, characterized in that, in the injection-moulded state, the connecting wall (4) runs essentially cylindrically.
16. Closure according to one or more of the preceding claims, characterized in that the connecting wall (4) has a reinforcement ring (24) and a fastening ring (26) is attached to the reinforcement ring (24).
17. Closure according to one or more of the preceding claims, characterized in that the fastening ring (26) is connected to the reinforcement ring (24) via an attachment wall (27) which, in cross-section, extends at an angle to the connecting wall (4).

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