EP1196330B1 - Plastic screw-type cap - Google Patents

Plastic screw-type cap Download PDF

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Publication number
EP1196330B1
EP1196330B1 EP00943511A EP00943511A EP1196330B1 EP 1196330 B1 EP1196330 B1 EP 1196330B1 EP 00943511 A EP00943511 A EP 00943511A EP 00943511 A EP00943511 A EP 00943511A EP 1196330 B1 EP1196330 B1 EP 1196330B1
Authority
EP
European Patent Office
Prior art keywords
face
sealing lip
screw
closure
spacer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP00943511A
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German (de)
French (fr)
Other versions
EP1196330A1 (en
Inventor
Wilhelm Wazel
Robert Armin Gilgen
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.)
Mouldtec Kunststoff GmbH
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Mouldtec Kunststoff GmbH
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Publication date
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Publication of EP1196330A1 publication Critical patent/EP1196330A1/en
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Publication of EP1196330B1 publication Critical patent/EP1196330B1/en
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Classifications

    • 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
    • B65D41/0435—Threaded or like caps or cap-like covers secured by rotation with separate sealing elements
    • B65D41/045—Discs
    • 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
    • B65D51/00—Closures not otherwise provided for
    • B65D51/16—Closures not otherwise provided for with means for venting air or gas
    • B65D51/1633—Closures not otherwise provided for with means for venting air or gas whereby venting occurs by automatic opening of the closure, container or other element
    • B65D51/1661—Closures not otherwise provided for with means for venting air or gas whereby venting occurs by automatic opening of the closure, container or other element by means of a passage for the escape of gas between the closure and the lip of the container mouth

Definitions

  • the invention relates to a screw cap Plastic for screwing onto a thread on one Bottle neck of a bottle according to the generic term of Claim 1.
  • a sealing lip with a conical one Sealing surface arranged when screwed on Screw cap on an outer sealing edge of the circular end face of the mouth of the bottle is applied.
  • There are recesses in the conical sealing surface provided that it extends from an area at screwed screw cap just outside the Sealing edge lies, extend to the edge of the sealing lip and communicate with the environment.
  • dome-shaped Bulge the bottom of the screw cap when increasing the The sealing lip slides with its sealing surface under internal pressure on the sealing edge. As soon as the pressure in the bottle and so that the bulge of the floor is big enough the recesses in the area of the sealing edge and create a passage for the gases from inside Bottle to the environment so that excess pressure can escape.
  • the object of the present invention is a Screw cap to create the blow off Overpressure within a narrow pressure range allows.
  • the mouth of the bottle is partly on the Face area and partly the outer one Circumferential sealing lip and one in between arranged elastically deformable sealing membrane Blow-off time or blow-off pressure is sufficiently precise pretend.
  • the segmentation of the Sealing lip can, depending on Requirement for the sealing lip, in n circle segments with minimal tangential distances or with Spaces that are the same or larger Have length like the lengths of the segments of Sealing lip.
  • the screw cap shown in Figures 1 to 6 1 comprises a closure base 3 and one thereon subsequent, essentially cylindrical Closure jacket 5, on the inside of which threaded sections 7 are formed.
  • On the outside of the Closure jacket 5 can ribs 9 or the like be provided, which the removal of the closure from Lighten the neck 11 of a bottle 13 ( Figures 3 to 5).
  • On the lower edge 14 of the screw cap 1 can in a tamper-evident ring 16 be injected.
  • the closure jacket 5 has a cylindrical section 15 on the inside, to which a second section 17, which extends in the shape of an arc or a straight line inwards, connects and forms the connection area to the closure bottom.
  • a second section 17 which extends in the shape of an arc or a straight line inwards, connects and forms the connection area to the closure bottom.
  • the thickness of the wall of the screw cap 1 decreases. It is considerably smaller than in the area of the bottom 3.
  • a sealing lip 19 adjoins the second section 17, the peripheral surface 21 of which runs essentially cylindrical in the unloaded state and can partially lie opposite the section 15 in parallel.
  • the sealing lip 19 extends from the apex S 2 of the groove 22 formed by the section 15 and the periphery 21 to a height h 1 into the inside of the screw cap 1 to the edge 24 of the sealing lip 19.
  • the inside flank 23 of the sealing lip 19 starts initially essentially parallel to the periphery 21 and then passes into a step P functioning as a drying edge, which leads to a thickening and gives the sealing lip 19 up to its root 29 a higher rigidity.
  • the stage P is at the height h 2 (FIG. 1).
  • the radially inner flank 25 of the sealing lip 19 adjoining the step P extends radially slightly inwardly inclined up to the height h 3 and ends there at the apex S 1 (cf. FIG. 1).
  • the sealing lip 19 can form a circumferential ring ( Figures 1 and 2) or can be divided into a plurality of circular ring segments ( Figure 6).
  • the sealing lip 19 is divided into segments 19 ' different versions are possible: on the one hand can the circumferential sealing lip 19 only through incisions 19 '' be divided into several segments 19 '(left half of the Figure 6), on the other hand, between the segments 19 ' Distances are formed, the length A of the length B of the Corresponds to segments 19 'or larger (right half of Figure 6). In preferred embodiments include the segments 19 'and the distances each 60 degrees or 45 degrees each.
  • the reduction in the thickness of the base 3 in the region of at least the apex S 1 forms an elastic zone which, when the base 3 bulges out, causes a relative movement of the sealing lip 19 to be described later.
  • the second downward wall 27 of the groove-shaped space 28 under the apex S 1 ends approximately at the height h 2 and forms the outer flank of a rib-shaped spacer 31 which comes to rest over the end face 33 of the bottle neck 11 when the screw cap 1 is open the bottle 13 is placed.
  • a further elastic spacer 35 can be arranged in a rib-shaped manner concentric with the spacer 31.
  • the closure base 3 can also have a circumferential groove 36 on the side of the radially inner spacer 35, which leads to a local reduction in the thickness of the closure base.
  • the thickness d 1 of the sealing membrane 37 is preferably between the periphery and the contact area with the elastic spacer 35 is greater than the thickness d 2 in the central area.
  • the closure membrane 37 it is possible to design the closure membrane 37 as an annular surface which extends essentially from the thread 7 to radially inside the inner spacer 35.
  • the periphery 38 of the closure membrane 37 lies outside the peripheral surface 21 of the sealing lip 19, so that the apex 24 of the latter abuts the closure membrane 37 in a line for a short time before the screw closure 1 is screwed onto the bottle neck 11.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Insulators (AREA)
  • Finger-Pressure Massage (AREA)
  • Materials For Medical Uses (AREA)

Abstract

The invention relates to a screw-type cap (19) having a sealing lip (19) with a base part (29) placed laterally in at least one thin part of the cap bottom (3). Whenever the cap bottom (3) bulges as a result of excess pressure in the bottle (13), the end of said sealing lip is pulled outwardly and said base part (29) is pulled inwardly. Tilting of the sealing lip (19) over the contact area in the neck (11) reduces the pressure force applied by the cap membrane (37) on said neck (11) and allows for a reduction of the excess pressure.

Description

Gegenstand der Erfindung ist ein Schraubverschluss aus Kunststoff zum Aufschrauben auf ein Gewinde an einem Flaschenhals einer Flasche gemass Oberbegriff des Patentanspruchs 1.The invention relates to a screw cap Plastic for screwing onto a thread on one Bottle neck of a bottle according to the generic term of Claim 1.

Bei der Lagerung und beim Transport von kohlesäurehaltigen Flüssigkeiten und insbesondere von Fruchtsäften, welche in der Flasche nach dem Abfüllen oder nach der Erstöffnung eine Nachgärung durchlaufen können, besteht die latente Gefahr, dass der Druck im Flascheninnern in einem solchen Masse ansteigt, dass die Flasche, sei es nun eine Glasoder Kunststoff-Flasche, platzt und schwere Verletzungen oder Sachschäden erzeugen kann. Es sind aus diesem Grunde bereits Versuche unternommen worden, die für den Verschluss von Flaschen verwendeten Schraubverschlüsse aus Kunststoff mit einer Abblasvorrichtung zu versehen, welche beim.Überschreiten eines vorgebbaren Drucks im Flascheninnern diesen abblasen lassen. When storing and transporting carbonated products Liquids and especially fruit juices, which in the bottle after filling or after first opening there is a latent fermentation Risk of pressure inside the bottle in such a way Mass increases that the bottle, be it a glass or Plastic bottle, bursts and serious injuries or can cause damage to property. It is for this reason attempts have already been made for the Closure of bottles used screw caps To provide plastic with a blow-off device, which when a predetermined pressure in the Blow off the inside of the bottle.

Aus der DE-C1 42 41 341 ist es bekannt, die Verschlussmembran in einem Flaschenverschluss oberhalb des Randes der Flaschenöffnung über eine umlaufende ringförmige Rippe abzustützen. Diese Stützrippe ist mit dem Kappenboden oder der Verschlussmembran derart gekoppelt, dass sie bei durch Überdruck innerhalb der verschlossenen Flasche bedingter Auswölbung des Kappenbodens bzw. der am Kappenboden anliegenden Dichtungsscheibe oder Verschlussmembran ein Anheben derselben vom Rand der Flaschenöffnung und damit ein selbsttätiges Entlüften des Flascheninnenraumes erlaubt. Weiter ist aus der DE-A1 198 47 001 eine Schraubkappe aus Kunststoff zum Verschluss einer Flasche bekannt, welche ohne Verschlussmembran auskommt. Im Innern der Schraubkappe ist eine Dichtlippe mit einer kegelförmigen Dichtfläche angeordnet, die bei aufgeschraubter Schraubkappe an einer äusseren Dichtkante der kreisringförmigen Stirnfläche der Mündung der Flasche anliegt. In der kegeligen Dichtfläche sind Ausnehmungen vorgesehen, die sich von einem Bereich, der bei aufgeschraubter Schraubkappe dicht ausserhalb der Dichtkante liegt, zum Rand der Dichtlippe hin erstrecken und mit der Umgebung in Verbindung stehen. Bei domförmigem Auswölben des Bodens der Schraubkappe bei Erhöhung des Innendrucks gleitet die Dichtlippe mit ihrer Dichtfläche auf der Dichtkante. Sobald der Druck in der Flasche und damit die Auswölbung des Bodens genügend gross ist, kommen die Ausnehmungen in den Bereich der Dichtkante und schaffen so einen Durchtritt für die Gase vom Innern der Flasche zur Umgebung, so dass Überdruck entweichen kann.From DE-C1 42 41 341 it is known that Sealing membrane in a bottle cap above the Edge of the bottle opening over a circumferential support annular rib. This support rib is with the cap bottom or the sealing membrane in such a way coupled that by overpressure within the sealed bottle of conditional bulge of the Cap base or the one lying against the cap base Lifting the sealing washer or sealing membrane the same from the edge of the bottle opening and thus one automatic venting of the bottle interior allowed. Furthermore, a screw cap is made from DE-A1 198 47 001 Plastic known for closing a bottle, which works without a sealing membrane. Inside the Screw cap is a sealing lip with a conical one Sealing surface arranged when screwed on Screw cap on an outer sealing edge of the circular end face of the mouth of the bottle is applied. There are recesses in the conical sealing surface provided that it extends from an area at screwed screw cap just outside the Sealing edge lies, extend to the edge of the sealing lip and communicate with the environment. With dome-shaped Bulge the bottom of the screw cap when increasing the The sealing lip slides with its sealing surface under internal pressure on the sealing edge. As soon as the pressure in the bottle and so that the bulge of the floor is big enough the recesses in the area of the sealing edge and create a passage for the gases from inside Bottle to the environment so that excess pressure can escape.

Beide bekannten Schraubverschlüsse ermöglichen das Abblasen bei überhöhtem Innendruck der Flasche. Allerdings ist der Streubereich des Zeitpunktes des Abblasens und damit auch des Druckes sehr gross. Dies ergibt eine nur bedingte und damit unzureichende Sicherheit für den Benutzer.Both known screw caps make this possible Blow off if the internal pressure of the bottle is too high. Indeed is the range of the time of the blowdown and so the pressure is also very high. This only results in one limited and therefore insufficient security for the User.

Aufgabe der vorliegenden Erfindung ist es, einen Schraubverschluss zu schaffen, der das Abblasen bei Überdruck innerhalb eines eng begrenzbaren Druckbereichs ermöglicht.The object of the present invention is a Screw cap to create the blow off Overpressure within a narrow pressure range allows.

Gelöst wird diese Aufgabe durch einen Schraubverschluss mit den Merkmalen des Patentanspruchs 1. Weitere vorteilhafte Ausgestaltungen der Erfindung sind in den abhängigen Ansprüchen definiert.This task is solved by a screw cap with the features of claim 1. Further advantageous embodiments of the invention are in the dependent claims defined.

Es gelingt mit einer die Mündung der Flasche teils auf dem Stirnflächenbereich aufliegenden und teils den äusseren Umfang umschliessenden Dichtlippe und einer dazwischen angeordneten elastisch verformbaren Verschlussmembran den Abblaszeitpunkt bzw. den Abblasdruck genügend exakt vorzugeben. Durch die erfindungsgemässe Anbindung der Wurzel der Dichtlippe am Schraubkappenboden kann deren Relativbewegung zum Flaschenhals während des Auswölbens des Kappenbodens infolge erhöhten Drucks in der Flasche vorbestimmt werden.The mouth of the bottle is partly on the Face area and partly the outer one Circumferential sealing lip and one in between arranged elastically deformable sealing membrane Blow-off time or blow-off pressure is sufficiently precise pretend. By connecting the Root of the sealing lip on the bottom of the screw cap can be Relative movement to the bottle neck during bulging of the cap base due to increased pressure in the bottle be predetermined.

Vorteilhaft wirkt sich zusätzlich die Segmentierung der Dichtlippe aus. Die Segmentierung kann, je nach Anforderung an die Dichtlippe, in n Kreissegmente mit minimalen tangentialen Abständen aufgeteilt oder aber mit Abständen versehen sein, die die gleiche oder grössere Länge aufweisen wie die Längen der Segmente der Dichtlippe.The segmentation of the Sealing lip. The segmentation can, depending on Requirement for the sealing lip, in n circle segments with minimal tangential distances or with Spaces that are the same or larger Have length like the lengths of the segments of Sealing lip.

Durch die Nutzung der elastischen Rückstellkraft des Kappenbodens (Kraftspeicherelement) wird die dichte Wiederverschliessung der Flasche nach dem gewünschten Druckabfall erreicht.By using the elastic restoring force of the Cap bottom (energy storage element) becomes the tight Reseal the bottle after the desired one Pressure drop reached.

Anhand eines illustrierten Ausführungsbeispiels wird die Erfindung näher erläutert. Es zeigen:

Figur 1
einen Querschnitt durch einen Schraubverschluss mit eingelegter Verschlussmembran vor dem Aufschrauben auf einen Flaschenhals und mit einem Erstöffnungsgarantieband,
Figur 2
einem vergrössert dargestellten Ausschnitt des Schraubverschlusses gemäss Figur 1,
Figur 3
einen Teil-Querschnitt durch den Schraubverschluss nach dem Aufschrauben auf einen Flaschenhals (bei Normaldruck),
Figur 4
einen Teil-Querschnitt durch den Schraubverschluss und den Flaschenhals bei erhöhtem Innendruck (ohne Abblasen) und
Figur 5
einen Teil-Querschnitt durch den Schraubverschluss und den Flaschenhals bei Überdruck (Abblasen des Überdrucks),
Figur 6
eine Ansicht des Kappenbodens von unten mit segmentierter Dichtlippe; linke Hälfte mit einer Segmentierung mit Einschnitten, rechte Hälfte mit einer Segmentierung mit grossen Abständen.
The invention is explained in more detail using an illustrated exemplary embodiment. Show it:
Figure 1
a cross section through a screw cap with inserted sealing membrane before screwing onto a bottle neck and with a first opening guarantee band,
Figure 2
1 shows an enlarged section of the screw cap according to FIG. 1,
Figure 3
a partial cross section through the screw cap after screwing onto a bottle neck (at normal pressure),
Figure 4
a partial cross section through the screw cap and bottle neck with increased internal pressure (without blowing off) and
Figure 5
a partial cross section through the screw cap and the bottle neck in the event of overpressure (blowing off the overpressure),
Figure 6
a view of the cap bottom from below with segmented sealing lip; left half with a segmentation with incisions, right half with a segmentation with large distances.

Der in den Figuren 1 bis 6 dargestellte Schraubverschluss 1 umfasst einen Verschlussboden 3 und einen daran anschliessenden, im wesentlichen zylindrischen Verschlussmantel 5, an dessen Innenseite Gewindeabschnitte 7 ausgebildet sind. Auf der Aussenseite des Verschlussmantels 5 können Rippen 9 oder dergleichen vorgesehen sein, welche das Abnehmen des Verschlusses vom Hals 11 einer Flasche 13 erleichtern (Figuren 3 bis 5). An der Unterkante 14 des Schraubverschlusses 1 kann in bekannter Weise ein Originalitätssicherungsring 16 angespritzt sein. The screw cap shown in Figures 1 to 6 1 comprises a closure base 3 and one thereon subsequent, essentially cylindrical Closure jacket 5, on the inside of which threaded sections 7 are formed. On the outside of the Closure jacket 5 can ribs 9 or the like be provided, which the removal of the closure from Lighten the neck 11 of a bottle 13 (Figures 3 to 5). On the lower edge 14 of the screw cap 1 can in a tamper-evident ring 16 be injected.

Im Bereich oberhalb der Gewindeabschnitte 7 weist der Verschlussmantel 5 auf der Innenseite einen zylindrischen Abschnitt 15 auf, an den oben ein bogenförmig oder geradlinig nach innen verlaufender zweiter Abschnitt 17 anschliesst und den Anschlussbereich zum Verschlussboden bildet. Im Bereich des bogenförmigen oder gerade verlaufenden zweiten Abschnitts 17 nimmt die Dicke der Wandung des Schraubverschlusses 1 ab. Sie ist wesentlich kleiner als im Bereich des Boden 3. Eine Dichtlippe 19 schliesst an den zweiten Abschnitt 17 an, wobei deren Peripheriefläche 21 in unbelastetem Zustand im wesentlichen zylindrisch verläuft und teilweise dem Abschnitt 15 parallel verlaufend gegenüberliegen kann. Die Dichtlippe 19 erstreckt sich vom Scheitel S2 der vom Abschnitt 15 und der Peripherie 21 gebildeten Nut 22 bis auf eine Höhe h1 ins Innere des Schraubverschlusses 1 zur Kante 24 der Dichtlippe 19. Von dort verläuft die innen liegende Flanke 23 der Dichtlippe 19 anfänglich im wesentlichen parallel zur Peripherie 21 und geht dann in eine als Drockkante fungierende Stufe P über, die zu einer Verdickung führt und der Dichtlippe 19 bis zu deren Wurzel 29 eine höhere Steifigkeit verleiht. Die Stufe P liegt auf der Höhe h2 (Figur 1). Die radial innenliegende, an die Stufe P anschliessende Flanke 25 der Dichtlippe 19 verläuft radial leicht nach innen geneigt bis zur Höhe h3 und endet dort im Scheitel S1 (vgl. Figur 1). Die Dichtlippe 19 kann einen umlaufenden Ring bilden (Figuren 1 und 2) oder in eine Vielzahl von Kreisring-Segmenten aufgeteilt sein (Figur 6).In the area above the threaded sections 7, the closure jacket 5 has a cylindrical section 15 on the inside, to which a second section 17, which extends in the shape of an arc or a straight line inwards, connects and forms the connection area to the closure bottom. In the area of the arcuate or straight second section 17, the thickness of the wall of the screw cap 1 decreases. It is considerably smaller than in the area of the bottom 3. A sealing lip 19 adjoins the second section 17, the peripheral surface 21 of which runs essentially cylindrical in the unloaded state and can partially lie opposite the section 15 in parallel. The sealing lip 19 extends from the apex S 2 of the groove 22 formed by the section 15 and the periphery 21 to a height h 1 into the inside of the screw cap 1 to the edge 24 of the sealing lip 19. From there, the inside flank 23 of the sealing lip 19 starts initially essentially parallel to the periphery 21 and then passes into a step P functioning as a drying edge, which leads to a thickening and gives the sealing lip 19 up to its root 29 a higher rigidity. The stage P is at the height h 2 (FIG. 1). The radially inner flank 25 of the sealing lip 19 adjoining the step P extends radially slightly inwardly inclined up to the height h 3 and ends there at the apex S 1 (cf. FIG. 1). The sealing lip 19 can form a circumferential ring (Figures 1 and 2) or can be divided into a plurality of circular ring segments (Figure 6).

Bei einer Aufteilung der Dichtlippe 19 in Segmente 19' sind verschiedene Ausführungen möglich: einerseits kann die umlaufende Dichtlippe 19 einzig durch Einschnitte 19'' in mehrere Segmente 19' unterteilt sein (linke Hälfte der Figur 6), anderseits können zwischen den Segmenten 19' Abstände ausgebildet sein, deren Länge A der Länge B der Segmente 19' entspricht oder grösser ist (rechte Hälfte der Figur 6). Bei bevorzugten Ausführungsformen umfassen die Segmente 19' und die Abstände je 60 Winkelgrade oder je 45 Winkelgrade.When the sealing lip 19 is divided into segments 19 ' different versions are possible: on the one hand can the circumferential sealing lip 19 only through incisions 19 '' be divided into several segments 19 '(left half of the Figure 6), on the other hand, between the segments 19 ' Distances are formed, the length A of the length B of the Corresponds to segments 19 'or larger (right half of Figure 6). In preferred embodiments include the segments 19 'and the distances each 60 degrees or 45 degrees each.

Die Verringerung der Dicke des Bodens 3 im Bereich mindestens des Scheitels S1 bildet eine elastische Zone, die beim Auswölben des Bodens 3 eine später zu beschreibende Relativbewegung der Dichtlippe 19 bewirkt. Die zweite nach unten verlaufende Wand 27 des nutförmigen Raums 28 unter dem Scheitel S1 endet etwa auf der Höhe h2 und bildet die äussere Flanke eines rippenförmigen Abstandhalters 31, welcher über der Stirnfläche 33 des Flaschenhalses 11 zu liegen kommt, wenn der Schraubverschluss 1 auf die Flasche 13 aufgesetzt ist. Konzentrisch zum Abstandhalter 31 kann ein weiterer elastischer Abstandhalter 35 rippenförmig angeordnet sein. Der Verschlussboden 3 kann seitlich des radial innen liegenden Abstandhalters 35 zudem eine umlaufende Nut 36 aufweisen, die zu einer örtlichen Verminderung der Dicke des Verschlussboden führt.The reduction in the thickness of the base 3 in the region of at least the apex S 1 forms an elastic zone which, when the base 3 bulges out, causes a relative movement of the sealing lip 19 to be described later. The second downward wall 27 of the groove-shaped space 28 under the apex S 1 ends approximately at the height h 2 and forms the outer flank of a rib-shaped spacer 31 which comes to rest over the end face 33 of the bottle neck 11 when the screw cap 1 is open the bottle 13 is placed. A further elastic spacer 35 can be arranged in a rib-shaped manner concentric with the spacer 31. The closure base 3 can also have a circumferential groove 36 on the side of the radially inner spacer 35, which leads to a local reduction in the thickness of the closure base.

Eine scheibenförmige Dicht- oder Verschlussmembran 37 aus weichem Kunststoff, auch Liner genannt, liegt lose gehalten über den bodennahen Gewindeabschnitten 7 und in einem Abstand zu den Scheiteln der Dichtlippe 19 und den Abstandhaltern 31 und 35. Vorzugsweise ist die Dicke d1 der Verschlussmembran 37 zwischen der Peripherie und dem Berührungsbereich mit dem elastischen Abstandhalter 35 grosser als die Dicke d2 im zentralen Bereich. Alternativ ist es möglich, die Verschlussmembran 37 als Kreisringfläche auszubilden, die sich im wesentlichen vom Gewinde 7 bis radial innerhalb des innenliegenden Abstandhalters 35 erstreckt. Die Peripherie 38 der Verschlussmembran 37 liegt ausserhalb der peripheren Fläche 21 des Dichtungslippe 19, so dass der Scheitel 24 der letzteren kurzzeitig linienförmig an der Verschlussmembran 37 anliegt, bevor der Schraubverschluss 1 auf den Flaschenhals 11 aufgeschraubt ist.A disk-shaped sealing or sealing membrane 37 made of soft plastic, also called a liner, is held loosely above the thread sections 7 near the bottom and at a distance from the apexes of the sealing lip 19 and the spacers 31 and 35. The thickness d 1 of the sealing membrane 37 is preferably between the periphery and the contact area with the elastic spacer 35 is greater than the thickness d 2 in the central area. Alternatively, it is possible to design the closure membrane 37 as an annular surface which extends essentially from the thread 7 to radially inside the inner spacer 35. The periphery 38 of the closure membrane 37 lies outside the peripheral surface 21 of the sealing lip 19, so that the apex 24 of the latter abuts the closure membrane 37 in a line for a short time before the screw closure 1 is screwed onto the bottle neck 11.

Beim Aufschrauben des Schraubverschlusses 1 auf den Hals 11 der Flasche 13 verdrängt die Stirnfläche 33 am Flaschenhals 11 und insbesondere deren periphere Kante 39 die Dichtlippe 19 radial nach aussen. Dabei wird der stufenförmig ausgebildete Bereich der Dichtlippe 19 im wesentlichen von der Verschlussmembran 37 ausgefüllt. Gleiches trifft auf den Raum zwischen den beiden Abstandhaltern 31 und 35 und teilweise den Ringraum 28 zwischen der Dichtlippe 19 und dem aussenliegenden Abstandhalter 31 zu (vgl. Figur 3). Der periphere Bereich der Verschlussmembran 37 wird um den Rand 39 des Flaschenhalses 11 herum nach unten gebogen. In diesem Zustand gewährleistet der Schraubverschluss 1 mit der auf dem Flaschenhals 11 aufgepressten Verschlussmembran 37 bei normalen Druckverhältnissen einen einwandfreien und dichten Verschluss der Flasche 13 mit einer grossen Kontaktfläche.When screwing the screw cap 1 onto the neck 11 of the bottle 13 displaces the end face 33 on Bottle neck 11 and in particular its peripheral edge 39 the sealing lip 19 radially outwards. The step-shaped area of the sealing lip 19 in essentially filled by the sealing membrane 37. The same applies to the space between the two Spacers 31 and 35 and partially the annular space 28 between the sealing lip 19 and the outside Spacer 31 too (see FIG. 3). The peripheral area the sealing membrane 37 is around the edge 39 of the Bottle neck 11 bent down around. In this The screw cap 1 ensures the condition with the closure membrane 37 pressed onto the bottle neck 11 normal pressure conditions a perfect and tight closure of the bottle 13 with a large one Contact area.

Erhöht sich nun der Druck im Innern der Flasche 13 infolge Gärung oder übermässige Erwärmung des Flascheninhalts über ein vorbestimmtes Mass hinaus, führt dies zu einer domartigen Auswölbung des Verschlussbodens 3 (Figur 4). Die Auswölbung des Verschlussbodens 3 wird durch die mindestens eine ringförmige Dünnstelle des Kappenbodens 3 im Bereich des Scheitels S1 des Einschnitts oder Raums 28 zwischen der Dichtlippe 19 und dem Abstandhalter 31 zusätzlich begünstigt. Das heisst, die Dichtlippe 19 selbst bewegt sich beim Auswölben des Bodens 3 leicht axial nach oben und es erfolgt eine radial nach innen gerichtete Verschiebung des Punktes Q im Wurzelbereich 29. Dies bewirkt ein Kippen der Dichtlippe 19 um den Punkt P an der Stufe 23. Durch diese Bewegung der Dichtlippe 19 hebt sich deren bei h1 liegendes Ende 24 radial nach aussen ab und gewährt der zwischen der Dichtlippe 19 und dem Flaschenhals 11 eingeklemmten Verschlussmembran 37 ebenfalls eine nach aussen und oben gerichtete Verschiebung. Durch diese translatorisch Bewegung vermindert sich der Druck der Dichtlippe 19 auf den Kantenbereich 39 des Flaschenhalses 11. Durch das gleichzeitige Abheben der beiden Abstandhalter 31 und 35 wird der Druck der Verschlussmembran 37 auf den zentralen Bereich der Stirnfläche 33 des Flaschenhalses 11 ebenfalls vermindert und ermöglicht das Abblasen von Gas und dadurch eine Reduktion des Überdrucks im Flascheninnern. Zusätzlich begünstigt wird das Abblasen durch das Ausweichen der Verschlussmembran 37 in den Raum zwischen der Dichtlippe 19 und der Abstandhalter 31 (vgl. Figur 5).If the pressure inside the bottle 13 now rises above a predetermined level as a result of fermentation or excessive heating of the bottle contents, this leads to a domed bulging of the closure base 3 (FIG. 4). The arching of the closure base 3 is additionally promoted by the at least one annular thin point of the cap base 3 in the region of the apex S 1 of the incision or space 28 between the sealing lip 19 and the spacer 31. This means that the sealing lip 19 itself moves slightly axially upwards when the base 3 bulges out and there is a radially inward displacement of the point Q in the root region 29. This causes the sealing lip 19 to tilt about the point P at the step 23. As a result of this movement of the sealing lip 19, its end 24, located at h 1 , lifts radially outward and also allows the sealing membrane 37 clamped between the sealing lip 19 and the bottle neck 11 to move outwards and upwards. This translational movement reduces the pressure of the sealing lip 19 on the edge region 39 of the bottle neck 11. By simultaneously lifting the two spacers 31 and 35, the pressure of the closure membrane 37 on the central region of the end face 33 of the bottle neck 11 is also reduced and enables this Blowing off gas and thereby reducing the overpressure inside the bottle. The blowing off is additionally promoted by the deflection of the sealing membrane 37 into the space between the sealing lip 19 and the spacer 31 (cf. FIG. 5).

Sobald der Druck im Innern der Flasche 13 nachlässt, vermindert sich die Wölbung des Verschlussbodens 3 und die Flasche 13 wird durch den Schraubverschluss 1 wieder einwandfrei dicht verschlossen.As soon as the pressure inside the bottle 13 subsides, the curvature of the closure base 3 and the Bottle 13 is through the screw cap 1 again properly sealed.

Claims (10)

  1. A screw-type closure (1) of plastic material for screwing onto a thread on a bottle neck (11) of a bottle (13) of glass or plastic material, comprising a closure top-face (3) and a cylindrical lateral closure-face (5), which is connected to the closure top-face (3) and on the inside of which thread portions (7) are constructed which are intended to engage with the thread of the bottle neck (11), and a closure membrane (37) which is supported on at least one continuous circumferential resilient spacer (31) on the closure top-face, the spacer (31) being intended to lie opposite the end face (23) of the bottle neck (11), characterised in that a sealing lip (19) is integrally formed on the closure top-face (3) such that it is located radially outside the spacer (31) and concentric therewith, said sealing lip resting radially inside against the closure membrane (37), and in that the closure top-face (3) has a thin point, at least in the region (S1) which is laterally radially inside the root (29) of the sealing lip (19), said thin point forming a resilient zone and a groove-shaped space (28) for temporarily receiving part of the closure membrane (37) when there is an increase in the internal pressure in the bottle (13).
  2. A screw-type closure according to Claim 1, characterised in that thin points in the lid top-face (3) are formed on both sides of the root (29) of the sealing lip (19).
  3. A screw-type closure according to one of Claims 1 or 2, characterised in that the sealing lip (19) projects axially downwards past the vertex of the adjacently arranged spacer (31) to the height (h1), the vertex being located at the height (h2).
  4. A screw-type closure according to Claim 3, characterised in that, on the flank face (25) directed inwards towards the space (28), the sealing lip (19) has a circumferential step (P) having a pressure edge.
  5. A screw-type closure according to Claim 4, characterised in that, in the unloaded condition, the step (P) is located at the same height (h2) as the vertex of the at least one spacer (31).
  6. A screw-type closure according to one of Claims 1 to 5, characterised in that a second spacer (35) is integrally formed on the lid top-face such that it is located radially inside the first spacer (31).
  7. A screw-type closure according to one of Claims 1 to 6, characterised in that an annular groove (36) reducing the thickness of the lid top-face (3) is formed radially inside the spacer (31) in the lid top-face (3).
  8. A screw-type closure according to one of Claims 1 to 6, characterised in that the thickness (d1) of the closure membrane (37), at least in the contact region with the bottle neck (11), is greater than the thickness (d2) in the central region.
  9. A screw-type closure according to one of Claims 1 to 8, characterised in that the sealing lip (19) is divided into a plurality of segments (19').
  10. A screw-type closure according to Claim 9, characterised in that the segments (19') are formed by incisions (19'') in the circumferential sealing lip (19), or in that the spacings between the individual segments (19') have a length (A) which is the same as the length (B) of the segments (19') or greater than the length (B) of the segments (19').
EP00943511A 1999-07-22 2000-07-20 Plastic screw-type cap Expired - Lifetime EP1196330B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
CH133899 1999-07-22
CH133899 1999-07-22
CH236399 1999-12-23
CH236399 1999-12-23
PCT/CH2000/000399 WO2001007334A1 (en) 1999-07-22 2000-07-20 Plastic screw-type cap

Publications (2)

Publication Number Publication Date
EP1196330A1 EP1196330A1 (en) 2002-04-17
EP1196330B1 true EP1196330B1 (en) 2003-06-11

Family

ID=25687389

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00943511A Expired - Lifetime EP1196330B1 (en) 1999-07-22 2000-07-20 Plastic screw-type cap

Country Status (8)

Country Link
EP (1) EP1196330B1 (en)
AT (1) ATE242737T1 (en)
AU (1) AU5800300A (en)
DE (1) DE50002548D1 (en)
DK (1) DK1196330T3 (en)
ES (1) ES2200888T3 (en)
PT (1) PT1196330E (en)
WO (1) WO2001007334A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2856663B1 (en) * 2003-06-24 2005-07-22 Pechiney Capsules IMPROVED SCREW CAPSULE
FR2907429B1 (en) * 2006-10-24 2010-11-12 Alcan Packaging Capsules CLOSURE CAPSULE WITH MULTILAYER SHAPE JOINT

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4592475A (en) * 1982-12-06 1986-06-03 Charles N. Hannon Plastic closure with mechanical pilfer-proof
US4531649A (en) * 1984-04-23 1985-07-30 Anchor Hocking Corporation Molded plastic cap with sealing liner
DE4241341C1 (en) 1992-12-08 1993-12-23 Wilhelm Dipl Ing Wazel Closure, in particular bottle closure
BR9813274A (en) 1997-10-25 2000-08-22 Safety Cap System Ag Plastic screw cap for closing a bottle or similar

Also Published As

Publication number Publication date
ATE242737T1 (en) 2003-06-15
ES2200888T3 (en) 2004-03-16
DE50002548D1 (en) 2003-07-17
AU5800300A (en) 2001-02-13
PT1196330E (en) 2003-09-30
EP1196330A1 (en) 2002-04-17
DK1196330T3 (en) 2003-09-22
WO2001007334A1 (en) 2001-02-01

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