EP0738663B1 - Closure cap - Google Patents

Closure cap Download PDF

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Publication number
EP0738663B1
EP0738663B1 EP19950106019 EP95106019A EP0738663B1 EP 0738663 B1 EP0738663 B1 EP 0738663B1 EP 19950106019 EP19950106019 EP 19950106019 EP 95106019 A EP95106019 A EP 95106019A EP 0738663 B1 EP0738663 B1 EP 0738663B1
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EP
European Patent Office
Prior art keywords
flank
closure cap
web
cap
container
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
EP19950106019
Other languages
German (de)
French (fr)
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EP0738663A1 (en
Inventor
Karl-Heinz Rosenthal
Filip Norbert
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.)
AptarGroup SAS
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AptarGroup SAS
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Filing date
Publication date
Application filed by AptarGroup SAS filed Critical AptarGroup SAS
Priority to EP19950106019 priority Critical patent/EP0738663B1/en
Publication of EP0738663A1 publication Critical patent/EP0738663A1/en
Application granted granted Critical
Publication of EP0738663B1 publication Critical patent/EP0738663B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D41/00Caps, 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
    • B65D41/02Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
    • B65D41/04Threaded or like caps or cap-like covers secured by rotation
    • B65D41/0471Threaded or like caps or cap-like covers secured by rotation with means for positioning the cap on the container, or for limiting the movement of the cap, or for preventing accidental loosening of the cap
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D41/00Caps, 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
    • B65D41/02Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
    • B65D41/04Threaded or like caps or cap-like covers secured by rotation

Definitions

  • the invention relates to a closure cap according to the preamble of claim 1.
  • a closure cap of this type is from FR-A-2 329 529 known.
  • FR-A-2 329 529 describes a sealing cap for one Container, the container neck provided with an opening has a threaded bead, the cap a Has thread groove, the width of the height of the cap is the same size.
  • Two one above the other at a distance Flank webs of adjacent thread grooves of the closure cap are elastic, so that by an elastic Deformation of the flank webs between the on the thread bead of the Contact surface of the container neck creates a frictional force which causes additional self-locking.
  • Such caps are used in particular for closing of containers in which perishable contents, such as food or cosmetic products.
  • By the screw cap should ensure that a repeated closing to seal the container opening possible after removing content from the container as often as required is.
  • the invention has for its object a closure cap to create the type mentioned above, even with repeated Closing a container opening a secure seal the container opening allows.
  • the thread groove is limited Flank webs are different in cross-section. Of the one flank is relatively rigid while the other Flank web is flexible. Furthermore, the distance is the opposite flank webs between adjacent thread grooves dimensioned so that the relatively flexible Flank web at deflection on the relatively rigid flank web can support.
  • This cap has an excessive load one flank through the support on the other Flank web avoided.
  • the cap is therefore special suitable to absorb large loads caused by accordingly large screwing moments applied to the flank webs become. This is the case, for example, when the closure cap to close a pressurized Container is used because here for a secure seal the container opening also the internal pressure of the container by a correspondingly increased pretension of the closure cap must be compensated.
  • flank webs are of different lengths, as a result of this Have areas defined in which the clamping effect of the Thread groove not as a result of the spreading of the flank webs or is only available to a limited extent. If so different long formation of the flank webs adjacent to a cap opening is provided such that a flank the thread groove ends before the other flank web screwing the cap onto the container opening each according to the difference in length of the flanks at least in the area of first thread easier.
  • a separate seal enables the selection a plastic material for the cap, which in particularly meets the elasticity requirements, without having to simultaneously meet the requirements for a sealing material, such as a good surface formability.
  • Fig. 1 shows a closure cap 31 on a container neck 11 is partially screwed on.
  • the cap 31 has a cylindrical cap jacket that is opposite a cap opening merges into a head wall.
  • a sealing washer 16 is used in a recess 15 on the underside of the head wall .
  • the sealing washer 16 can also be a spherical cap-shaped projection or a Plug on the underside of the head wall as a seal.
  • the cap jacket is provided on the inside with a thread groove 17, the one for receiving an outside on the container neck arranged threaded bead 18 is used.
  • the thread groove 17 is in width by an upper and delimits a lower flank web 19, 32 which is a usual replace one-piece thread cord. Between the flanks 19 and 32 of the adjacent threads are at a distance.
  • flank webs 19, 32 can in their to the cap opening the beginning of the thread is of unequal length be. So the thread start of the upper flank can 19 almost one thread further towards the cap opening as the thread start of the lower one Flank web 32 extend.
  • Fig. 1 From an overall view of Fig. 1 it follows that the cap 31 in the screwing-on phase shown in FIG. 1 over one revolution on a threaded bead 18 of the container neck 11 is screwed on. This results from one smaller than a width of the threaded bead 18 Width of the thread groove 17, which is part of the thread bead 18 picks up a spread between the top and bottom Flank webs 19, 32, the flank web 19 being deflected becomes.
  • Fig. 2 shows the cap 31 in the screwed End position so that the threaded bead 18 is completely in the Thread groove 17 has penetrated. 2 also shows that the spread of the flank 19, 32 accordingly is far advanced, so that the threaded bead 18th in the thread groove 17 of the closure cap 31, with the exception, for example the first half of the lower end of the threaded bead 18, is recorded.
  • the cap 31 there is a sealing washer 16 sealingly on an end face Opening edge 28 of the container neck 11.
  • the cap 31 with the container neck 11 an axial sealing force in the direction of the central axis of the container neck 11 exerted on the sealing disk 16.
  • This sealing force is kept in balance by an opposite acting axial component by the elastic Restoring forces of the flank web 19 in the contact area the threaded bead 18 caused friction. Prevent it the elastic restoring forces acting on the threaded bead 18 the flank web 19 an automatic loosening of the cap 31 on the container neck 11.
  • FIGS. 1 to 3 thus show a closure cap 31, the upper flank web 19 and lower flank web 32 different are trained.
  • the flank 32 has opposite Flank web 19 is an enlarged cross section and is thus more rigid.
  • FIGS. 1 and 2 for different screwing phases is shown that only the upper, more flexible, thinner flank cross-section 19 is deflected by the threaded bead 18 and the lower, more rigid, cross-sectionally thicker flank 32 at one Spreading of the flank webs 19, 32 by the threaded bead 18 in remains essentially undeformed.
  • a distance d between that upper flank web 19 and the lower flank web 32 is included dimensioned so that the more flexible flank 19 on more rigid flank web 32 can support.
  • This is the thread groove 17 in the illustrated in FIGS. 1 to 3 Embodiment of the cap 31 capable, particularly absorb high screwing forces and therefore accordingly to generate high sealing forces.

Description

Die Erfindung betrifft eine Verschlußkappe gemäß dem Oberbegriff des Patentanspruches 1.The invention relates to a closure cap according to the preamble of claim 1.

Eine Verschlußkappe dieser Gattung ist aus FR-A-2 329 529 bekannt.A closure cap of this type is from FR-A-2 329 529 known.

FR-A-2 329 529 beschreibt eine Verschlußkappe für einen Behälter, dessen mit einer Öffnung versehener Behälterhals einen Gewindewulst aufweist, wobei die Verschlußkappe eine Gewindenut hat, deren Breite über die Höhe der Verschlußkappe gleich groß bemessen ist. Zwei in einem Abstand übereinanderliegende Flankenstege benachbarter Gewindenuten der Verschlußkappe sind elastish ausgebildet, so daß durch eine elastische Verformung der Flankenstege zwischen den am Gewindewulst des Behälterhalses anliegenden Kontaktflächen eine Reibkraft erzeugt wird, die eine zusätzliche Selbsthemmung hervorruft.FR-A-2 329 529 describes a sealing cap for one Container, the container neck provided with an opening has a threaded bead, the cap a Has thread groove, the width of the height of the cap is the same size. Two one above the other at a distance Flank webs of adjacent thread grooves of the closure cap are elastic, so that by an elastic Deformation of the flank webs between the on the thread bead of the Contact surface of the container neck creates a frictional force which causes additional self-locking.

Derartige Verschlußkappen dienen insbesondere zum Verschließen von Behältern, in denen verderbliche Inhalte, wie etwa Lebensmittel oder kosmetische Produkte, aufgenommen werden. Durch den Schraubverschluß soll sichergestellt werden, daß ein wiederholtes, die Behälteröffnung abdichtendes Verschließen nach beliebig häufiger Inhaltsentnahme aus dem Behälter möglich ist.Such caps are used in particular for closing of containers in which perishable contents, such as food or cosmetic products. By the screw cap should ensure that a repeated closing to seal the container opening possible after removing content from the container as often as required is.

Das wiederholte, abdichtende Verschließen einer Behälteröffnung mit einer Schraubverschlußkappe erweist sich jedoch häufig als nicht realisierbar, weil insbesondere bei der Kombination eines Kunststoffschraubverschlusses mit einer Behälteröffnung aus Glas die Tendenz besteht, daß sich der zur Erzeugung der Abdichtung unter Vorspannung auf die Behälteröffnung aufgeschraubte Verschluß selbsttätig löst. Hieraus ergibt sich häufig eine unzureichende Abdichtung der Verschlußkappe gegenüber der Behälteröffnung, so daß Luft und etwaige kontaminierende Stoffe aus der Umgebung in das Behälterinnere eintreten können, oder je nach Beschaffenheit des Behälterinhalts und Lagerung des Behälters der Behälterinhalt aus dem Behälter austreten kann.The repeated sealing of a container opening with a screw cap turns out, however often as not feasible, especially with the Combination of a plastic screw cap with a Container opening made of glass there is a tendency for the Creation of the seal under prestress on the container opening unscrewed closure automatically releases. Out of this there is often insufficient sealing of the cap opposite the container opening so that air and any contaminants from the environment in the Can enter the inside of the container, or depending on the nature of the container content and storage of the container can escape from the container.

Der Erfindung liegt die Aufgabe zugrunde, eine Verschlußkappe der eingangs genannten Art zu schaffen, die auch bei wiederholtem Verschließen einer Behälteröffnung eine sichere Abdichtung der Behälteröffnung ermöglicht.The invention has for its object a closure cap to create the type mentioned above, even with repeated Closing a container opening a secure seal the container opening allows.

Diese Aufgabe wird durch eine Verschlußkappe mit den Merkmalen des Anspruchs 1 gelöst.This task is accomplished by a cap with the features of claim 1 solved.

Bei der Verschlußkappe sind die eine Gewindenut begrenzenden Flankenstege im Querschnitt unterschiedlich ausgebildet. Der eine Flankensteg ist relativ biegesteif, während der andere Flankensteg biegeelastisch ist. Ferner ist der Abstand der gegenüberliegenden Flankenstege zwischen benachbarten Gewindenutgängen so bemessen, daß sich der relativ biegeweiche Flankensteg bei Auslenkung am relativ biegesteifen Flankensteg abstützen kann.In the closure cap, the thread groove is limited Flank webs are different in cross-section. Of the one flank is relatively rigid while the other Flank web is flexible. Furthermore, the distance is the opposite flank webs between adjacent thread grooves dimensioned so that the relatively flexible Flank web at deflection on the relatively rigid flank web can support.

Bei dieser Verschlußkappe wird eine übermäßig hohe Belastung des einen Flankenstegs durch die Abstützung am anderen Flankensteg vermieden. Die Verschlußkappe ist daher besonders geeignet, große Belastungen aufzunehmen, die durch entsprechend große Aufschraubmomente auf die Flankenstege aufgebracht werden. Dies ist beispielsweise dann der Fall, wenn die Verschlußkappe zum Verschließen eines unter Druck stehenden Behälters verwendet wird, da hier für eine sichere Abdichtung der Behälteröffnung zusätzlich auch noch der Behälterinnendruck durch eine entsprechend erhöhte Vorspannung der Verschlußkappe kompensiert werden muß. This cap has an excessive load one flank through the support on the other Flank web avoided. The cap is therefore special suitable to absorb large loads caused by accordingly large screwing moments applied to the flank webs become. This is the case, for example, when the closure cap to close a pressurized Container is used because here for a secure seal the container opening also the internal pressure of the container by a correspondingly increased pretension of the closure cap must be compensated.

Als vorteilhaft erweist es sich auch, wenn die Flankenstege unterschiedlich lang ausgebildet sind, da sich hierdurch Bereiche definieren lassen, in denen die klemmende Wirkung der Gewindenut infolge der Spreizung der Flankenstege nicht oder nur eingeschränkt vorhanden ist. Wenn eine derart unterschiedlich lange Ausbildung der Flankenstege benachbart einer Verschlußkappenöffnung vorgesehen ist, derart, daß ein Flankensteg der Gewindenut vor dem anderen Flankensteg endet, wird das Aufschrauben der Verschlußkappe auf die Behälteröffnung je nach Längendifferenz der Flankenstege zumindest im Bereich des ersten Gewindeganges erleichtert.It also proves to be advantageous if the flank webs are of different lengths, as a result of this Have areas defined in which the clamping effect of the Thread groove not as a result of the spreading of the flank webs or is only available to a limited extent. If so different long formation of the flank webs adjacent to a cap opening is provided such that a flank the thread groove ends before the other flank web screwing the cap onto the container opening each according to the difference in length of the flanks at least in the area of first thread easier.

Um die Dichtwirkung der Verschlußkappe zu erhöhen, kann an deren der Verschlußkappenöffnung gegenüberliegenden Verschlußboden innenseitig eine Dichtung zur abdichtenden Auflage auf der Behälteröffnung angeordnet sein. Die Verwendung einer gesonderten Dichtung ermöglicht die Auswahl eines Kunststoffmaterials für die Verschlußkappe, das in besonderem Maße den Elastizitätsanforderungen gerecht wird, ohne gleichzeitig die Anforderungen erfüllen zu müssen, die an ein Dichtungsmaterial gestellt werden, wie beispielsweise eine gute Oberflächenverformbarkeit.To increase the sealing effect of the cap, can whose opposite the cap opening Closure bottom inside a seal for sealing Rest be arranged on the container opening. The usage A separate seal enables the selection a plastic material for the cap, which in particularly meets the elasticity requirements, without having to simultaneously meet the requirements for a sealing material, such as a good surface formability.

Nachfolgend wird eine bevorzugte Ausführungsform der erfindungsgemäßen Verschlußkappe anhand der Zeichnungen näher erläutert. Es zeigen:

Fig. 1
eine Verschlußkappe mit unterschiedlich ausgeformten Flankenstegen in einer Anfangsphase des Aufschraubens auf eine Behälteröffnung;
Fig. 2
die in Fig. 1 dargestellte Verschlußkappe in vollständig auf die Behälteröffnung aufgeschraubtem Zustand; und
Fig. 3
die in den Fig. 1 und 2 dargestellte Verschlußkappe in Einzeldarstellung.
A preferred embodiment of the closure cap according to the invention is explained in more detail below with reference to the drawings. Show it:
Fig. 1
a closure cap with differently shaped flank webs in an initial phase of screwing onto a container opening;
Fig. 2
the cap shown in Figure 1 in the fully screwed onto the container opening state. and
Fig. 3
the closure cap shown in FIGS. 1 and 2 in individual representation.

Fig. 1 zeigt eine Verschlußkappe 31, die auf einen Behälterhals 11 teilweise aufgeschraubt ist. Die Verschlußkappe 31 weist einen zylindrischen Kappenmantel auf, der gegenüberliegend einer Verschlußkappenöffnung in eine Kopfwand übergeht. In einer Ausnehmung 15 an der Unterseite der Kopfwand ist eine Dichtscheibe 16 eingesetzt. Anstelle der Dichtscheibe 16 kann auch ein kugelkalottenförmiger Vorsprung oder ein Stopfen an der Unterseite der Kopfwand als Dichtung dienen.Fig. 1 shows a closure cap 31 on a container neck 11 is partially screwed on. The cap 31 has a cylindrical cap jacket that is opposite a cap opening merges into a head wall. In a recess 15 on the underside of the head wall a sealing washer 16 is used. Instead of the sealing washer 16 can also be a spherical cap-shaped projection or a Plug on the underside of the head wall as a seal.

Der Kappenmantel ist innenseitig mit einer Gewindenut 17 versehen, die zur Aufnahme eines außenseitig an dem Behälterhals angeordneten Gewindewulstes 18 dient.The cap jacket is provided on the inside with a thread groove 17, the one for receiving an outside on the container neck arranged threaded bead 18 is used.

Die Gewindenut 17 ist in ihrer Breite durch einen oberen und einen unteren Flankensteg 19, 32 begrenzt, die eine übliche, einteilige Gewindekordel ersetzen. Zwischen den Flankenstegen 19 und 32 der benachbarten Gewindegänge besteht ein Abstand.The thread groove 17 is in width by an upper and delimits a lower flank web 19, 32 which is a usual replace one-piece thread cord. Between the flanks 19 and 32 of the adjacent threads are at a distance.

Die Flankenstege 19, 32 können in ihren zur Verschlußkappenöffnung hin gelegenen Gewindeanfängen ungleich lang ausgebildet sein. So kann sich der Gewindeanfang des oberen Flankenstegs 19 nahezu um einen Gewindegang weiter in Richtung auf die Verschlußkappenöffnung als der Gewindeanfang des unteren Flankenstegs 32 erstrecken.The flank webs 19, 32 can in their to the cap opening the beginning of the thread is of unequal length be. So the thread start of the upper flank can 19 almost one thread further towards the cap opening as the thread start of the lower one Flank web 32 extend.

Aus einer Gesamtschau der Fig. 1 ergibt sich, daß die Verschlußkappe 31 in der in Fig. 1 dargestellten Aufschraubphase über eine Umdrehung auf einen Gewindewulst 18 des Behälterhalses 11 aufgeschraubt ist. Hierbei ergibt sich aufgrund einer gegenüber einer Breite des Gewindewulstes 18 geringeren Breite der Gewindenut 17, die einen Teil des Gewindewulstes 18 aufnimmt, eine Spreizung zwischen den oberen und unteren Flankenstegen 19, 32, wobei der Flankensteg 19 ausgelenkt wird.From an overall view of Fig. 1 it follows that the cap 31 in the screwing-on phase shown in FIG. 1 over one revolution on a threaded bead 18 of the container neck 11 is screwed on. This results from one smaller than a width of the threaded bead 18 Width of the thread groove 17, which is part of the thread bead 18 picks up a spread between the top and bottom Flank webs 19, 32, the flank web 19 being deflected becomes.

Fig. 2 zeigt die Verschlußkappe 31 in der aufgeschraubten Endstellung, so daß der Gewindewulst 18 vollständig im Gewindenut 17 vorgedrungen ist. Aus Fig. 2 ist auch ersichtlich, daß die Spreizung des Flankensteges 19, 32 entsprechend weit fortgeschritten ist, so daß nunmehr der Gewindewulst 18 in der Gewindenut 17 der Verschlußkappe 31, mit Ausnahme etwa der ersten Hälfte des unteren Endes des Gewindewulstes 18, aufgenommen ist. In dieser Stellung der Verschlußkappe 31 liegt eine Dichtscheibe 16 abdichtend an einem stirnseitigen Öffnungsrand 28 des Behälterhalses 11 an. Infolge der Verschraubung der Verschlußkappe 31 mit dem Behälterhals 11 wird eine axiale Dichtkraft in Richtung der Mittelachse des Behälterhalses 11 auf die Dichtscheibe 16 ausgeübt. Dieser Dichtkraft wird das Gleichgewicht gehalten durch eine entgegengesetzt wirkende Axialkomponente der durch die elastischen Rückstellkräfte des Flankensteges 19 in der Kontaktfläche mit dem Gewindewulst 18 verursachten Reibkraft. Somit verhindern die auf den Gewindewulst 18 wirkenden elastischen Rückstellkräfte des Flankensteges 19 ein selbsttätiges Lösen der Verschlußkappe 31 auf dem Behälterhals 11.Fig. 2 shows the cap 31 in the screwed End position so that the threaded bead 18 is completely in the Thread groove 17 has penetrated. 2 also shows that the spread of the flank 19, 32 accordingly is far advanced, so that the threaded bead 18th in the thread groove 17 of the closure cap 31, with the exception, for example the first half of the lower end of the threaded bead 18, is recorded. In this position the cap 31 there is a sealing washer 16 sealingly on an end face Opening edge 28 of the container neck 11. As a result of the screw connection the cap 31 with the container neck 11 an axial sealing force in the direction of the central axis of the container neck 11 exerted on the sealing disk 16. This sealing force is kept in balance by an opposite acting axial component by the elastic Restoring forces of the flank web 19 in the contact area the threaded bead 18 caused friction. Prevent it the elastic restoring forces acting on the threaded bead 18 the flank web 19 an automatic loosening of the cap 31 on the container neck 11.

Die Fig. 1 bis 3 zeigen somit eine Verschlußkappe 31, deren oberer Flankensteg 19 und unterer Flankensteg 32 unterschiedlich ausgebildet sind. Der Flankensteg 32 hat gegenüber dem Flankensteg 19 einen vergrößerten Querschnitt und ist somit biegesteifer. Dies führt dazu, wie in den Fig. 1 und 2 für verschiedene Aufschraubphasen dargestellt ist, daß lediglich der obere, biegeweichere, im Querschnitt dünnere Flankensteg 19 durch den Gewindewulst 18 ausgelenkt wird und der untere, biegesteifere, im Querschnitt dickere Flankensteg 32 bei einer Spreizung der Flankenstege 19, 32 durch den Gewindewulst 18 im wesentlichen unverformt bleibt. Ein Abstand d zwischen dem oberen Flankensteg 19 und dem unteren Flankensteg 32 ist dabei so bemessen, daß sich der biegeweichere Flankensteg 19 am biegesteiferen Flankensteg 32 abstützen kann. Hierdurch ist die Gewindenut 17 bei dem in den Fig. 1 bis 3 dargestellten Ausführungsbeispiel der Verschlußkappe 31 in der Lage, besonders hohe Schraubkräfte aufzunehmen und somit entsprechend hohe Dichtkräfte zu erzeugen.1 to 3 thus show a closure cap 31, the upper flank web 19 and lower flank web 32 different are trained. The flank 32 has opposite Flank web 19 is an enlarged cross section and is thus more rigid. This leads to, as in FIGS. 1 and 2 for different screwing phases is shown that only the upper, more flexible, thinner flank cross-section 19 is deflected by the threaded bead 18 and the lower, more rigid, cross-sectionally thicker flank 32 at one Spreading of the flank webs 19, 32 by the threaded bead 18 in remains essentially undeformed. A distance d between that upper flank web 19 and the lower flank web 32 is included dimensioned so that the more flexible flank 19 on more rigid flank web 32 can support. This is the thread groove 17 in the illustrated in FIGS. 1 to 3 Embodiment of the cap 31 capable, particularly absorb high screwing forces and therefore accordingly to generate high sealing forces.

Claims (4)

  1. Closure cap (31) for a container, particularly a glass container, whose throat (11) is provided with an opening and has a screw thread bead (18), the closure cap (31) having a screw thread groove (17), the breadth of which is the same over the height of the closure cap (31), a flank web (19) of two flank webs (19, 31), which are disposed at a distance (a:d) above one another, of adjacent screw thread grooves (17) in the closure cap (31) being of elastic construction such that, as a result of elastic deformation of one flank web (19) between the contact surfaces engaging the screw thread bead (18) on the container throat (11), a frictional force is produced which causes additional self locking, characterised in that the other flank web (32) is relatively stiff in bending with respect to the one flank web (19) and the spacing (b) of the flank webs (19, 32) of adjacent screw thread grooves (17) is such that the flank web (19), which is relatively flexible, engages the relatively stiff flank web (2), when it is deflected.
  2. Closure cap as claimed in claim 1, characterised in that the flank webs (19, 32) are of different lengths.
  3. Closure cap as claimed in claim 2, characterised in that the flank webs (19, 32) directed towards a closure cap opening (13) are of different lengths at a thread start (23, 24).
  4. Closure cap as claimed in one or more of the preceding claims, characterised in that a seal, preferably constructed as a sealing ring (16), for sealing engagement with an opening edge (28) of the container throat (11) is arranged on the inner surface of a top wall opposite to the closure cap opening (13).
EP19950106019 1995-04-21 1995-04-21 Closure cap Expired - Lifetime EP0738663B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19950106019 EP0738663B1 (en) 1995-04-21 1995-04-21 Closure cap

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19950106019 EP0738663B1 (en) 1995-04-21 1995-04-21 Closure cap

Publications (2)

Publication Number Publication Date
EP0738663A1 EP0738663A1 (en) 1996-10-23
EP0738663B1 true EP0738663B1 (en) 1999-02-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19950106019 Expired - Lifetime EP0738663B1 (en) 1995-04-21 1995-04-21 Closure cap

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2339771A (en) * 1998-07-18 2000-02-09 Rexam Containers Ltd Closure and container neck combination with deformable screw thread
FR2946028B1 (en) * 2009-05-26 2011-07-08 Oreal MOUTH PIECE FOR A CONTAINER, FOR USE WITH A COMPLEMENTARY MOUTH PIECE OF THE CONTAINER.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1399727A (en) * 1964-04-09 1965-05-21 J P Grussen Ets New double-thread capsule
FR2329529A1 (en) * 1975-10-29 1977-05-27 Giraud Gallaire Ets Screw threaded bottle stopper - is formed from plastics material with pairs of small projections engaging bottle threads
GB1544854A (en) * 1976-11-25 1979-04-25 Ump Plastics Ltd Closure cap
DE4340229C2 (en) * 1993-11-25 1995-10-19 Innocos Gmbh Sealing cap

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EP0738663A1 (en) 1996-10-23

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