EP0020522B1 - Cap for container producing a gas pressure - Google Patents

Cap for container producing a gas pressure Download PDF

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Publication number
EP0020522B1
EP0020522B1 EP19790901389 EP79901389A EP0020522B1 EP 0020522 B1 EP0020522 B1 EP 0020522B1 EP 19790901389 EP19790901389 EP 19790901389 EP 79901389 A EP79901389 A EP 79901389A EP 0020522 B1 EP0020522 B1 EP 0020522B1
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EP
European Patent Office
Prior art keywords
sealing lip
container
gas pressure
closure
sealing
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Expired
Application number
EP19790901389
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German (de)
French (fr)
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EP0020522A1 (en
Inventor
Walter Wiedmer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Walter Wiedmar AG Plastikform
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Walter Wiedmar AG Plastikform
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Publication of EP0020522A1 publication Critical patent/EP0020522A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
    • B65D41/02—Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
    • B65D41/04—Threaded or like caps or cap-like covers secured by rotation
    • B65D41/0407—Threaded or like caps or cap-like covers secured by rotation with integral sealing means
    • B65D41/0428—Threaded or like caps or cap-like covers secured by rotation with integral sealing means formed by a collar, flange, rib or the like contacting the top rim or the top edges or the external surface of a container neck

Definitions

  • the invention relates to a closure made of elastic material for containers with a gas pressure-generating content, with two sealing lips attached to its vertical part surrounding the mouth part of the container, which protrude essentially radially inwards and are at a distance from each other which is smaller than the radial extent of each one Sealing lip is, the diameter of the free end of each sealing lip is smaller than the outer diameter of the mouth part, so that the sealing lips bend upwards when the closure is placed on the container.
  • closures are already known from DE-A-2614335.
  • two, in another even three such sealing lips are provided, all of which come to lie against the outside of the container in order to seal there.
  • Similar sealing lips are also known from DE-A-1 482 569 and DE-A-2 726 431. All these sealing lips are designed so that when the closure is placed or screwed onto the mouth part of the container, according to their length upwards, i.e. be bent towards the mouth of the container. If gas forms inside the container and the pressure of this gas increases, liquid is also expelled in addition to the gas. This must first infiltrate the horizontal part of the closure, which lies flat on the mouth surface of the container, before it reaches the sealing lips. There, the co-driven gas, which is still under pressure, generally only presses the sealing lips more firmly against the outer wall of the container because of their bending, so that the sealing effect is increased still further.
  • each sealing lip acts independently of the others with regard to the seal; there is no functional connection between adjacent lips, since they are even deliberately far apart from each other with individual closures. This presupposes that the sealing lips are executed properly. If the manufacturing tolerances are too large, the gas and even the liquid can still escape to the outside between the sealing lips and the outer wall of the container, since the internal thread of the closure and the external thread of the container interacting with it alone cannot guarantee an adequate seal.
  • bottles are also not ideal in terms of their shape.
  • the deviations from the desired shape and the desired dimensions reach a level that always creates new sealing problems.
  • Bottles that are oval in cross-section or have the shape of two compound but halved ring halves are not uncommon. Notches, broken-out parts and other defects also contribute to the fact that even the best sealing lips hang in one or more places along their circumference, so to speak, which greatly reduces their contact pressure locally. If the gas pressure then begins to take effect, this point bends due to its too low contact pressure, and it can even turn inside out. This clears the way for the escaping liquid.
  • a closure of the type mentioned at the beginning, which meets these requirements, is characterized according to the invention by the features of claim 1.
  • Fig. 1 shows the closure 1 while being placed on the mouth part 2 of the container, here a bottle.
  • the closure is shown as a screw closure with an internal thread 3 which interacts with an external thread 4 on the mouth part 2.
  • the closure could just as well be a so-called snap lock, which is pressed over a bead on the edge of the mouth part 2.
  • the two sealing lips 5, 6 are at a distance a from one another, measured from center line 9 to center line 10, which is less than the radial extension or height h of each individual sealing lip 5, 6. Furthermore, the diameter of each sealing lip is measured at its tip 11 or 12, less than that of the mouth part 2 (FIG. 1), any deviations from the nominal diameter having already been taken into account in the latter.
  • the tips 11, 12 are rounded so that they can adapt to their shape when entering a possibly sharp-edged bottle.
  • the sealing lips 5, 6, as shown in FIGS. 2 and 3, are elastically bent upwards, which is done without great effort due to their thin shape. This puts them under pressure against the mouth part 2.
  • the tip 12 of the lower sealing lip 6 projects into an area 13 which on one side of the underside 14 of the upper sealing lip 5 in the non-bent state (designated 14 '), but on its second side from the same underside 14 but continuously State, and is limited on the third side by the mouth part 2.
  • This area 13 is hatched in FIG. 2 and outlined with strong lines. How far the tip 12 extends into this area 13 mainly depends on the inevitable manufacturing tolerances. It is only essential that the tip does not extend to the top corner 15 of this area.
  • the gas pressure initially propagates radially outward along the cap part 8 and then acts on the upper sealing lip 5 from above. This will therefore go downwards, as shown by dash-dotted lines 14 ′′ in FIG. 2. It sits on the tip 12 of the lower sealing lip 6. This also comes into effect and supports the upper sealing lip 5, which is now essential can absorb higher gas pressure, which also causes an even stronger pressing of its tip 11 against the mouth part 2. In this way (as tests have confirmed), a perfect seal is achieved even at very high pressures.
  • This seating of the upper sealing lip 5 on the lower sealing lip 6 also occurs, for example, when the mouth part would have a notch or local indentation 2 'FIG. 2.
  • the part of the tip 11 protruding into this notch is thus bent less than the rest and also less strongly than the tip 12 of the sealing lip 6, which is located outside the notch 2 '. Due to the lower deflection, the contact pressure of the sealing lip 5 is also lower, so that there is a risk that the gas could bend the tip 11 there or at least move behind it. By resting on the more bent sealing lip 6, this danger is avoided.
  • the two sealing lips 5, 6 do not overlap; the lower sealing lip 6 serves, in addition to its function as a second seal, above all as a support for the upper sealing lip 5, so that the two sealing lips actually interact, in contrast to the earlier individual effects of similar sealing lips.
  • the tip 12 can be given a more pronounced shape according to FIG. 3.
  • it can have a thickening 16 on its upper side, which is adapted to the lower side 14 of the upper sealing lip 5 when it is seated in order to be able to better distribute the pressure.
  • the closure shown has not only proven itself for bottles made of glass, but can also be used for those made of plastic, as they have recently come onto the market. Although the plastic of such bottles is softer than that of the closure, the two sealing lips 5, 6 are flexible enough to achieve a perfect seal here as well.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)

Abstract

The cap comprises two sealing rims (5, 6) the length (h) of which exceeds the mutual distance thereof (a). When the cap is applied to the neck (2) of the container, the rims are readily folded upwardly. The end of the lower rim (6) engages into a space (13) which is defined by the lower surface (14, 14') of the rim (5) before and after the deformation thereof and by the wall of the neck (2). When a gas pressure occurs the upper rim (5) fills up further so that it bears against the end (12) of the lower rim and is supported thereby. Ence, a perfect sealing is provided without having to make a big effort to unscrew the cap.

Description

Die Erfindung betrifft einen Verschluss aus elastischem Material für Behälter mit einem gasdruckerzeugenden Inhalt, mit zwei an seinem den Mündungsteil des Behälters umgebenden vertikalen Teil angebrachten Dichtlippen, die im wesentlichen radial nach innen abstehen und voneinander einen Abstand aufweisen, der kleiner als die radiale Ausdehnung jeder einzelnen Dichtlippe ist, wobei der Durchmesser des freien Endes jeder Dichtlippe kleiner als der Aussendurchmesser des Mündungsteils ist, so dass die Dichtlippen sich beim Aufsetzen des Verschlusses auf den Behälter nach oben durchbiegen.The invention relates to a closure made of elastic material for containers with a gas pressure-generating content, with two sealing lips attached to its vertical part surrounding the mouth part of the container, which protrude essentially radially inwards and are at a distance from each other which is smaller than the radial extent of each one Sealing lip is, the diameter of the free end of each sealing lip is smaller than the outer diameter of the mouth part, so that the sealing lips bend upwards when the closure is placed on the container.

Solche Verschlüsse sind bereits aus der DE-A-2614335 bekannt geworden. Bei einer Ausführungsform jenes Verschlusses sind zwei, bei einer anderen sogar drei solcher Dichtlippen vorgesehen, die alle gegen die Aussenseite des Behälters anzuliegen kommen, um dort abzudichten. Ähnliche Dichtlippen sind ebenfalls aus der DE-A-1 482 569 und der DE-A-2 726 431 bekannt. Alle diese Dichtlippen sind so ausgebildet, dass sie beim Aufsetzen bzw. Aufschrauben des Verschlusses auf den Mündungsteil des Behälters zufolge ihrer Länge nach oben, d.h. gegen die Mündung des Behälters hin durchgebogen werden. Wenn sich im Innern des Behälters Gas bildet, und der Druck dieses Gases ansteigt, wird neben dem Gas auch Flüssigkeit ausgetrieben. Diese muss zuerst den horizontalen Teil des Verschlusses, der flach auf der Mündungsfläche des Behälters aufliegt, unterwandern, bevor sie zu den Dichtlippen gelangt. Dort drückt das mitausgetriebene, immer noch unter Druck stehende Gas die Dichtlippen wegen deren Umbiegung im allgemeinen nur noch fester an die Aussenwand des Behälters an, so dass die Dichtwirkung noch erhöht wird.Such closures are already known from DE-A-2614335. In one embodiment of that closure, two, in another even three such sealing lips are provided, all of which come to lie against the outside of the container in order to seal there. Similar sealing lips are also known from DE-A-1 482 569 and DE-A-2 726 431. All these sealing lips are designed so that when the closure is placed or screwed onto the mouth part of the container, according to their length upwards, i.e. be bent towards the mouth of the container. If gas forms inside the container and the pressure of this gas increases, liquid is also expelled in addition to the gas. This must first infiltrate the horizontal part of the closure, which lies flat on the mouth surface of the container, before it reaches the sealing lips. There, the co-driven gas, which is still under pressure, generally only presses the sealing lips more firmly against the outer wall of the container because of their bending, so that the sealing effect is increased still further.

Jede Dichtlippe wirkt jedoch in bezug auf die Dichtung unabhängig von den andern; es besteht kein funktioneller Zusammenhang zwischen benachbarten Lippen, da diese bei einzelnen Verschlüssen sogar bewusst einen grossen Abstand unter sich aufweisen. Dies setzt voraus, dass die Dichtlippen einwandfrei ausgeführt sind. Bei zu grossen Fabrikationstoleranzen kann das Gas und sogar die Flüssigkeit dennoch zwischen den Dichtlippen und der Aussenwand des Behälters nach aussen gelangen, da das Innengewinde des Verschlusses und das mit ihm zusammenwirkende Aussengewinde des Behälters allein keine ausreichende Dichtung gewährleisten können.However, each sealing lip acts independently of the others with regard to the seal; there is no functional connection between adjacent lips, since they are even deliberately far apart from each other with individual closures. This presupposes that the sealing lips are executed properly. If the manufacturing tolerances are too large, the gas and even the liquid can still escape to the outside between the sealing lips and the outer wall of the container, since the internal thread of the closure and the external thread of the container interacting with it alone cannot guarantee an adequate seal.

Aber auch die Behälter sind durchwegs nicht ideal in bezug auf ihre Form. Namentlich bei Getränkeflaschen erreichen die Abweichungen von der gewünschten Form und den gewüschten Abmessungen ein Ausmass, das stets neue Dichtigkeitsprobleme schafft. Flaschen, die im Querschnitt oval sind oder die Form zweier zusammengesetzter, aber gegeneinander verschobener Ringhälften aufweisen, sind keine Seltenheit. Kerben, ausgebrochene Partien und andere Fehler tragen ebenfalls dazu bei, dass auch die besten Dichtlippen an einer oder an mehreren Stellen längs ihres Umfanges sozusagen im Leeren hängen, was ihren Anpressdruck örtlich sehr stark herabsetzt. Beginnt dann der Gasdruck zu wirken, biegt sich diese Stelle wegen ihres zu schwachen Anpressdruckes durch, und es kann sogar zum Umstülpen kommen. Damit ist der Weg frei für die austretende Flüssigkeit.But the containers are also not ideal in terms of their shape. In the case of beverage bottles in particular, the deviations from the desired shape and the desired dimensions reach a level that always creates new sealing problems. Bottles that are oval in cross-section or have the shape of two compound but halved ring halves are not uncommon. Notches, broken-out parts and other defects also contribute to the fact that even the best sealing lips hang in one or more places along their circumference, so to speak, which greatly reduces their contact pressure locally. If the gas pressure then begins to take effect, this point bends due to its too low contact pressure, and it can even turn inside out. This clears the way for the escaping liquid.

Glücklicherweise sind jedoch solche Fehlerstellen entweder örtlich begrenzt oder, wenn sie im Falle der verschobenen Ringhälften durchgehend sind, alles andere als genau gleichmässig. An einer bestimmten Stelle des Umfanges liegt daher eine Dichtlippe nur schwach auf, während die benachbarte, darunter liegende Dichtlippe sehr stark aufliegt. Daher werden die Dichtlippen erfindungsgemäss so ausgebildet, dass nicht nur jede einzelne für sich wirkt, sondern dass sie zusammenarbeiten. Insbesondere soll erreicht werden, dass eine Dichtlippe, die sich infolge des Gasdrukkes an einer solchen Stelle stärker durchbiegt, auf die darunter liegende Dichtlippe aufliegen und sich auf ihr abstützen kann, ohne aber dabei ihren Kontakt mit der Aussenwand des Behältermündungsteils zu verlieren. Auch soll dabei das Lösen des Verschlusses ohne erhöhten Kraftaufwand möglich sein.Fortunately, however, such flaws are either localized or, if they are continuous in the case of the displaced ring halves, are anything but exactly uniform. At a certain point on the circumference, therefore, a sealing lip lies only weakly, while the adjacent sealing lip lying underneath lies very strongly. The sealing lips are therefore designed according to the invention in such a way that not only does each work individually, but that they work together. In particular, the aim is to ensure that a sealing lip, which bends more strongly at such a point as a result of the gas pressure, can rest on the underlying sealing lip and be supported on it, but without losing its contact with the outer wall of the container mouth part. It should also be possible to release the closure without increased effort.

Ein Verschluss der eingangs erwähnten Art, der diesen Forderungen genügt, ist erfindungsgemäss durch die Merkmale des Anspruches 1 gekennzeichnet.A closure of the type mentioned at the beginning, which meets these requirements, is characterized according to the invention by the features of claim 1.

Es wird im folgenden anhand der in den Zeichnungen dargestellten Ausführungsbeispiele näher erläutert; hierbei zeigen:

  • Fig. 1 einen Querschnitt durch den Verschluss samt Behältermündungsteil während des Aufsetzens,
  • Fig. 2 in grösserem Massstab die beiden Dichtlippen, und
  • Fig. 3 die beiden Dichtlippen bei ihrem Aufeinanderliegen, mit einer anderen Ausführungsform der unteren Dichtlippe.
It is explained in more detail below with reference to the exemplary embodiments shown in the drawings; show here:
  • 1 shows a cross section through the closure together with the container mouth part during placement,
  • Fig. 2 on a larger scale, the two sealing lips, and
  • Fig. 3 shows the two sealing lips when they lie on one another, with another embodiment of the lower sealing lip.

Fig. 1 zeigt den Verschluss 1 während des Aufsetzens auf den Mündungsteil 2 des Behälters, hier einer Flasche. Der Verschluss ist in diesem Ausführungsbeispiel als Schraubverschluss mit einem Innengewinde 3 dargestellt, das mit einem Aussengewinde 4 am Mündungsteil 2 zusammenwirkt. Es könnte sich aber auch ebensogut um einen sogenannten Schnappverschluss handeln, der über eine Wulst am Rand des Mündungsteiles 2 gepresst wird.Fig. 1 shows the closure 1 while being placed on the mouth part 2 of the container, here a bottle. In this exemplary embodiment, the closure is shown as a screw closure with an internal thread 3 which interacts with an external thread 4 on the mouth part 2. But it could just as well be a so-called snap lock, which is pressed over a bead on the edge of the mouth part 2.

Wesentliches Merkmal sind die beiden langen und dünnen Dichtlippen 5, 6, die sich ringförmig um den ganzen vertikalen Teil 7 des Verschlusses 1 herum erstrecken. Sie sind nur an diesem Teil angebracht; der horizontale Teil des Verschlusses, der sogenannte Kappenteil 8, weist keine solchen Lippen auf, da er durch das aus dem Behälter aufsteigende Gas elastisch nach oben durchgebogen wird, wodurch die Gefahr des Abhebens allfälliger Dichtlippen entsteht. Dei beiden Dichtlippen 5, 6 weisen voneinander einen Abstand a auf, von Mittellinie 9 zu Mittellinie 10 gemessen, welcher geringer ist als die radiale Ausdehnung oder Höhe h jeder einzelnen Dichtlippe 5, 6. Im weiteren ist der Durchmesser jeder Dichtlippe, gemessen an ihrer Spitze 11 bzw. 12, geringer als derjenige des Mündungsteiles 2 (Fig. 1) wobei beim letzteren allfällige Abweichungen vom Nenndurchmesser bereits berücksichtigt sind. Die Spitzen 11, 12 sind abgerundet, damit sie beim Einlaufen auf eine eventuell scharfkantige Flasche sich an deren Form anpassen können.An essential feature are the two long and thin sealing lips 5, 6, which extend in a ring around the entire vertical part 7 of the closure 1. They are only attached to this part; the horizontal part of the closure, the so-called cap part 8, has no such lips, since it is elastically bent upwards by the gas rising from the container, which increases the risk of lifting off mature sealing lips are created. The two sealing lips 5, 6 are at a distance a from one another, measured from center line 9 to center line 10, which is less than the radial extension or height h of each individual sealing lip 5, 6. Furthermore, the diameter of each sealing lip is measured at its tip 11 or 12, less than that of the mouth part 2 (FIG. 1), any deviations from the nominal diameter having already been taken into account in the latter. The tips 11, 12 are rounded so that they can adapt to their shape when entering a possibly sharp-edged bottle.

Durch das Aufschrauben oder Aufsetzen werden die Dichtlippen 5, 6, wie in Fig. 2 und 3 dargestellt, elastisch nach oben durchgebogen, was wegen ihrer dünnen Form ohne grossen Kraftaufwand erfolgt. Dadurch legen sie sich unter Druck gegen den Mündungsteil 2 an. Die Spitze 12 der unteren Dichtlippe 6 ragt dabei in einen Bereich 13 hinein, der auf seiner einen Seite von der Unterseite 14 der oberen Dichtlippe 5 im nicht durchgebogenen Zustand (mit 14' bezeichnet), auf seiner zweiten Seite von derselben Unterseite 14 aber im durchgehenden Zustand, und auf der dritten Seite durch den Mündungsteil 2 begrenzt wird. Dieser Bereich 13 ist in Fig. 2 schraffiert und mit starken Linien umrandet dargestellt. Wie weit die Spitze 12 in diesen Bereich 13 hineinreicht, hängt zur Hauptsache von den unvermeidlichen Fabrikationstoleranzen ab. Wesentlich ist lediglich, dass die Spitze nicht bis zur obersten Ecke 15 dieses Bereiches reicht.By screwing or fitting, the sealing lips 5, 6, as shown in FIGS. 2 and 3, are elastically bent upwards, which is done without great effort due to their thin shape. This puts them under pressure against the mouth part 2. The tip 12 of the lower sealing lip 6 projects into an area 13 which on one side of the underside 14 of the upper sealing lip 5 in the non-bent state (designated 14 '), but on its second side from the same underside 14 but continuously State, and is limited on the third side by the mouth part 2. This area 13 is hatched in FIG. 2 and outlined with strong lines. How far the tip 12 extends into this area 13 mainly depends on the inevitable manufacturing tolerances. It is only essential that the tip does not extend to the top corner 15 of this area.

Entwickelt die Flüssigkeit im Behälter ein Gas, so pflanzt sich der Gasdruck vorerst radial entlang des Kappenteils 8 nach aussen fort und wirkt dann von oben her auf die obere Dichtlippe 5 ein. Diese wird daher nach unten durchgehen, wie mit strichpunktierten Linien 14" in Fig. 2 dargestellt. Dabei setzt sie sich auf die Spitze 12 der unteren Dichtlippe 6 auf. Diese kommt nun ebenfalls zur Wirkung und stützt die obere Dichtlippe 5, welche nun einen wesentlich höheren Gasdruck aufnehmen kann, der zudem ein noch kräftigeres Anpressen ihrer Spitze 11 gegen den Mündungsteil 2 bewirkt. Auf diese Weise (wie Versuche bestätigt haben) wird eine einwandfreie Dichtung auch bei sehr hohen Drücken erreicht.If the liquid in the container develops a gas, the gas pressure initially propagates radially outward along the cap part 8 and then acts on the upper sealing lip 5 from above. This will therefore go downwards, as shown by dash-dotted lines 14 ″ in FIG. 2. It sits on the tip 12 of the lower sealing lip 6. This also comes into effect and supports the upper sealing lip 5, which is now essential can absorb higher gas pressure, which also causes an even stronger pressing of its tip 11 against the mouth part 2. In this way (as tests have confirmed), a perfect seal is achieved even at very high pressures.

Dieses Aufsitzen der oberen Dichtlippe 5 auf die untere Dichtlippe 6 tritt beispielsweise auch dann ein, wenn der Mündungsteil eine Kerbe oder örtliche Einbuchtung 2' Fig. 2 aufweisen würde. Der in diese Kerbe hineinragende Teil der Spitze 11 wird also weniger stark durchgebogen als der Rest und auch weniger stark als die Spitze 12 der Dichtlippe 6, die sich ausserhalb der Kerbe 2' befindet. Durch die geringere Durchbiegung ist auch der Anpressdruck der Dichtlippe 5 geringer, so dass die Gefahr besteht, dass das Gas dort die Spitze 11 umbiegen oder mindestens hinterwandern könnte. Durch das Aufliegen auf die stärker durchgebogene Dichtlippe 6 wird aber diese Gefahr vermieden.This seating of the upper sealing lip 5 on the lower sealing lip 6 also occurs, for example, when the mouth part would have a notch or local indentation 2 'FIG. 2. The part of the tip 11 protruding into this notch is thus bent less than the rest and also less strongly than the tip 12 of the sealing lip 6, which is located outside the notch 2 '. Due to the lower deflection, the contact pressure of the sealing lip 5 is also lower, so that there is a risk that the gas could bend the tip 11 there or at least move behind it. By resting on the more bent sealing lip 6, this danger is avoided.

Man erkennt aus diesen Ausführungen, dass die beiden Dichtlippen 5, 6 sich nicht überlappen; die untere Dichtlippe 6 dient, neben ihrer Funktion als zweite Dichtung, vor allem als Stütze für die obere Dichtlippe 5, so dass ein eigentliches Zusammenspiel der beiden Dichtlippen, im Gegensatz zu den früheren einzelnen Wirkungen ähnlicher Dichtlippen entsteht.It can be seen from these statements that the two sealing lips 5, 6 do not overlap; the lower sealing lip 6 serves, in addition to its function as a second seal, above all as a support for the upper sealing lip 5, so that the two sealing lips actually interact, in contrast to the earlier individual effects of similar sealing lips.

Um ihre Stützfunktion noch besser ausüben zu können, kann die Spitze 12 eine ausgeprägtere Form gemäss Fig. 3 erhalten. Sie kann beispielsweise auf ihrer Oberseite eine Verdickung 16 aufweisen, die der Unterseite 14 der oberen Dichtlippe 5 bei ihrem Aufsitzen angepasst ist, um so den Druck besser verteilen zu können.In order to be able to exercise its support function even better, the tip 12 can be given a more pronounced shape according to FIG. 3. For example, it can have a thickening 16 on its upper side, which is adapted to the lower side 14 of the upper sealing lip 5 when it is seated in order to be able to better distribute the pressure.

Der dargestellte Verschluss hat sich nicht nur für Flaschen aus Glas bewährt, sondern kann auch für solche aus Kunststoff, wie sie neuerdings auf den Markt gelangen, verwendet werden. Obwohl der Kunststoff solcher Flaschen weicher ist als derjenige des Verschlusses, sind die beiden Dichtlippen 5, 6 flexibel genug, um auch hier eine einwandfreie Dichtung zu erreichen.The closure shown has not only proven itself for bottles made of glass, but can also be used for those made of plastic, as they have recently come onto the market. Although the plastic of such bottles is softer than that of the closure, the two sealing lips 5, 6 are flexible enough to achieve a perfect seal here as well.

Claims (3)

1. A closure made from elastic material for containers with a gas pressure-producing content, with two sealing lips (5,6) provided on the vertical part surrounding the container opening (2), said sealing lips projecting essentially radially inwards and have a spacing (a) from one another which is smaller than the radial extension (h) of each individual sealing lip, the diameter of the free end of each sealing lip being smaller than the external diameter of the opening (2), so that on fitting the closure (1) to the container, the sealing lips (5, 6) bend upwards, wherein the said radial extension (h) of the lower sealing lip (6) is at the maximum sufficiently large for the bent free end (12) of said lip (6) to serve as a support for the upper sealing lip (5) during the bending thereof as a result of the gas pressure acting on it.
2. A closure according to claim 1, wherein the bent free end (12) of the lower sealing lip is located within an area (13) formed on one side by the bottom (14') of the upper sealing lip in its unbent state, on a further side by the same bottom (14) in the bent state, but when it is not subject to the action of gas pressure and on a third side by the opening (2) of the container.
3. A closure according to claims 1 or 2, wherein at least the upper side of the free end (12) of the lower sealing lip (6) has a shape (16) adapted to the bottom (14) of the upper sealing lip.
EP19790901389 1978-11-23 1980-06-03 Cap for container producing a gas pressure Expired EP0020522B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH12037/78 1978-11-23
CH1203778A CH636570A5 (en) 1978-11-23 1978-11-23 CLOSURE MADE OF ELASTIC MATERIAL ON A CONTAINER WITH GAS PRINTING CONTENT.

Publications (2)

Publication Number Publication Date
EP0020522A1 EP0020522A1 (en) 1981-01-07
EP0020522B1 true EP0020522B1 (en) 1982-03-24

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ID=4379253

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19790901389 Expired EP0020522B1 (en) 1978-11-23 1980-06-03 Cap for container producing a gas pressure

Country Status (9)

Country Link
EP (1) EP0020522B1 (en)
AU (1) AU5286679A (en)
BE (1) BE880203A (en)
CA (1) CA1134781A (en)
CH (1) CH636570A5 (en)
DE (1) DE2953337D2 (en)
GB (1) GB2046721B (en)
NL (1) NL7920113A (en)
WO (1) WO1980001061A1 (en)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
DE9316986U1 (en) * 1993-11-06 1994-01-20 Hydac Technology Gmbh, 66280 Sulzbach Cover device
CN104058160A (en) * 2014-06-11 2014-09-24 东莞特宏塑胶五金有限公司 Silica gel bottle cap

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Publication number Priority date Publication date Assignee Title
US4917269A (en) * 1989-05-10 1990-04-17 Owens-Illinois Closure Inc. Liquid containing and dispensing package
DE4301306C2 (en) * 1993-01-20 1995-12-21 Alcoa Gmbh Verpackwerke Plastic closure
US5785196A (en) * 1995-05-31 1998-07-28 Rexam Closures Inc. Closure for a pressurized container
DE102010028522A1 (en) * 2010-05-04 2011-11-10 Robert Bosch Gmbh Screw cap for soft packaging
MX2023010033A (en) * 2021-03-02 2023-09-11 Aptar Freyung Gmbh A bottom dispensing package.

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DE1482569A1 (en) * 1965-07-01 1969-06-19 Hopf A Metallwerke Kg Screw cap closure
LU74665A1 (en) * 1975-04-07 1977-01-28
DE2708714A1 (en) * 1977-03-01 1978-09-07 Roppelt Guenter Dipl Braumstr SCREW CAP FOR CONTAINER

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9316986U1 (en) * 1993-11-06 1994-01-20 Hydac Technology Gmbh, 66280 Sulzbach Cover device
CN104058160A (en) * 2014-06-11 2014-09-24 东莞特宏塑胶五金有限公司 Silica gel bottle cap

Also Published As

Publication number Publication date
AU5286679A (en) 1980-05-29
CH636570A5 (en) 1983-06-15
CA1134781A (en) 1982-11-02
WO1980001061A1 (en) 1980-05-29
BE880203A (en) 1980-03-17
NL7920113A (en) 1980-09-30
GB2046721A (en) 1980-11-19
EP0020522A1 (en) 1981-01-07
GB2046721B (en) 1983-03-30
DE2953337D2 (en) 1981-02-26

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