EP1105318B1 - Sealing cap - Google Patents

Sealing cap Download PDF

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Publication number
EP1105318B1
EP1105318B1 EP99944396A EP99944396A EP1105318B1 EP 1105318 B1 EP1105318 B1 EP 1105318B1 EP 99944396 A EP99944396 A EP 99944396A EP 99944396 A EP99944396 A EP 99944396A EP 1105318 B1 EP1105318 B1 EP 1105318B1
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EP
European Patent Office
Prior art keywords
cap
abutment
closure cap
sealing
wall
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
EP99944396A
Other languages
German (de)
French (fr)
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EP1105318A1 (en
Inventor
Georg Pfefferkorn
Udo Bösl
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.)
obrist Closures Switzerland
Original Assignee
Crown Cork and Seal Technologies Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Crown Cork and Seal Technologies Corp filed Critical Crown Cork and Seal Technologies Corp
Priority to EP99944396A priority Critical patent/EP1105318B1/en
Publication of EP1105318A1 publication Critical patent/EP1105318A1/en
Application granted granted Critical
Publication of EP1105318B1 publication Critical patent/EP1105318B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B65D41/0407—Threaded or like caps or cap-like covers secured by rotation with integral sealing means
    • B65D41/0414—Threaded or like caps or cap-like covers secured by rotation with integral sealing means formed by a plug, collar, flange, rib or the like contacting the internal surface of a container neck
    • B65D41/0421—Threaded or like caps or cap-like covers secured by rotation with integral sealing means formed by a plug, collar, flange, rib or the like contacting the internal surface of a container neck and combined with integral sealing means contacting other surfaces of a container neck
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S215/00—Bottles and jars
    • Y10S215/01—Fins
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S215/00—Bottles and jars
    • Y10S215/902—Vent

Definitions

  • the invention relates to a closure cap with the features of the preamble of claim 1 (see for example the Document WO-A-95/21095).
  • Caps made of plastic material are in one Variety for closing containers, for example Beverage bottles used.
  • a closure cap to be provided with a sealing insert and at the same time to define the screw-on position of the sealing cap. If the internal pressure is increased, the sealing washer should be compressed and act as a pressure relief valve.
  • EP-A-464 384 discloses a self-venting bottle cap known, due to weaknesses in the top plate the sealing effect is canceled with increased internal pressure shall be.
  • DE-A-196 13 830 describes a self-venting closure known in which the cap base is weakened.
  • the Weakening leads to the fact that the The base of the cap is arched outwards (so-called doming) and that it is formed in one piece with the cap base Inner seal is relieved of pressure.
  • the cap should be simple and be economical to produce and with conventional screwing devices be screwable.
  • the cap essentially consists of a cap base and a cap wall. There is a circumferential one on the cap bottom Internal seal provided. The seal is with a Seal line, which against the inside of the container mouth can be pressed and achieves a sealing effect.
  • the cap can also be on the inside of the cap wall arranged retaining elements, for example one Screw thread, are held on the container mouth.
  • the closure cap has a first stop, which arises approximately from the bottom of the cap.
  • a second stop to limit the screwing movement of the cap is arranged.
  • the second stop can start with, for example Engage threads on the container mouth and so the Limit unscrewing movement.
  • the second stop is advantageous formed as a circumferential ring, the stop plane runs approximately perpendicular to the axis of the closure cap.
  • the cap wall is also with a deformable wall section Mistake.
  • the deformable wall section is between arranged the first and the second stop.
  • the Deformability can be achieved by weakening the wall thickness in the Area of the wall section can be achieved, for example through a recess on the inside of the cap wall.
  • the inventors of the present invention have found that a weakening of the closure cap in the area of the Cap wall compared to known weaknesses in the cap base has surprising advantages.
  • An increased internal pressure in the container closed by the cap not primarily a curvature of the cap base, but an axial displacement of the cap base.
  • the So movement is essentially linear. This means that any seals on the outside or on the front the container mouth due to the axial translation movement of the cap bottom also out of sealing engagement devices. Of course, there can still be a specific one Curvature occur.
  • the axial distance between the first and the second stop on the one hand and the depth of penetration of the sealing line on the other hand are selected such that the sealing line disengages from the inside of the container mouth at a predetermined internal pressure.
  • This minimum pressure varies depending on the contents in the container. In the case of fruit juices it is around 2 bar, in the case of beverages with a low CO 2 content it is 5 bar and in the case of a content with 4 vol.% CO 2 it is above 8 bar.
  • the degree of deformability of the wall section is also selected accordingly.
  • the first stop engages when screwed on the top of the tank mouth before the second stop engages with the start of the thread.
  • the penetration depth of the sealing line denotes the axial one Distance of the sealing line from the first stop in deformed Condition or distance of the sealing line from the top the container mouth.
  • the deformability is set for normal conditions, i.e. for temperatures in the range of 15 - 35 ° C. If the outside temperature If these values are exceeded, the deformability larger (softening of the plastic material). The venting function is therefore favored at a higher temperature.
  • the two stops serve for precisely defined pretensioning the weakening zone in the cap wall.
  • the inner seal also advantageously points to the Ventilation cutouts on the side facing the cap apron.
  • the ventilation cutouts are below the sealing line arranged.
  • the inner seal is advantageous as a so-called Olive seal trained. This means that the sealing line a maximum outer diameter of the inner seal defined and spaced from the inside of the cap base is arranged.
  • Such olive seals have the advantage in Seal inside the container mouth, where normally one to find a precisely defined sealing surface without damage is.
  • the disadvantage of such olive seals is that they already seal due to the preload when the Sealing cap is not in the attached position, but axially slightly above the sealing position. thanks to the Ventilation recesses, which are advantageous immediately below start the sealing line, the sealing effect is canceled, as soon as the sealing line outside the container mouth lies. An extension of the sealing effect due to a shift the sealing line over which is tapered down This prevents a tapering inner seal.
  • the cap can also with a circumferential Be sealing bead provided against the outside of the Container mouth can be pressed.
  • the sealing bead is axial arranged between the first and second stop.
  • the closure cap is also advantageous with hold-open elements Mistake.
  • Such hold-open elements can, for example above the sealing line on the cap wall facing surface of the inner seal may be provided.
  • the Keep-open elements prevent the sealing line from shifting. If there is still doming of the internal pressure If the bottom of the cap comes, the hold-open elements are supported on the container mouth, so the location of the inner seal with respect to the container mouth essentially only is changed by translation. Can keep open of course on the other sealing elements, in particular on the second stop acting as a seal or on the optional against the outside of the container annular bead.
  • Figure 1 shows a cap 1, which essentially consists of a cap base 2 and a cap wall 3.
  • the Cap wall 3 is provided with a screw thread 6, with which the cap 1 on a container mouth 20th can be screwed on.
  • the Inner seal 4 On the inside of the cap base 2 there is an inner seal 4 arranged in the form of a circumferential sealing lip.
  • the Inner seal 4 is designed as a so-called olive seal.
  • the inner seal 4 has a sealing line 5, which can be pressed against the inside of a container mouth.
  • the sealing line 5 is at a distance from the inside of the cap base 2 arranged and defines the maximum outer diameter the surface 10 of the cap apron 3 facing the Inner seal 4.
  • the inner seal 4 is below the sealing line 5 with ventilation cutouts 11 provided which on the surface 10 are arranged.
  • the first stop 8 is a circumferential bead trained who also has a sealing function.
  • a second stop 7 is located above the end of the thread 6 on the inside of the cap wall 3 above the thread 6 arranged.
  • the stop 7 has a stop plane that runs approximately perpendicular to the axis of the closure cap.
  • the Stops 7, 8 are predeterminable in the axial direction Distance d spaced.
  • the cap wall 3 is provided with a deformable wall area 9.
  • Open hold elements 13 are arranged, which ensure that the sealing line 5 of the inner seal 4 does not shift, i.e. that the inner seal 4 only in the area of the sealing line 5 can be sealed against the inside of the container mouth.
  • the outside of the cap apron 3 is also with a Corrugation or provided with ribs 14, which the cap wall 3 below the weakening zone 9 sufficient strength and give good grip properties.
  • the cap 1 can also with a guarantee tape 15 and be provided with vertical ventilation slats 16, which interrupt the thread 6.
  • a guarantee tape 15 and be provided with vertical ventilation slats 16, which interrupt the thread 6.
  • vertical ventilation slats 16 which interrupt the thread 6.
  • FIG 2 the sealing part of the closure cap is according to Figure 1 is shown enlarged. If the cap 1 is screwed onto a container mouth 20, comes first the first stop 8 with the end face 23 of the container mouth 20 engaged. By further screwing on the Cap wall 3 in the region of the deformable wall section 9 deformed axially until the second stop 7 with the Thread start 22 of the container mouth 20 engages. In the fully applied state is the deformable one Wall area 9 biased to a precisely predetermined value.
  • a circumferential sealing bead 12 seals against the Outside 24 of the container mouth 20.
  • the container mouth 20 On the inside 21 the container mouth 20 is the inner seal 4 with the Sealing line 5 sealing.
  • the sealing line 5 has a through relative position to the second stop 7 predetermined penetration depth t in the tank mouth.
  • the cap base 2 becomes axial Direction A shifted up (see Figure 3).
  • the axial Displacement of the cap base 2 is due to the deformable Wall section 9 favors.
  • the second stop 7 remains thereby engaging with the thread beginning 22 of the container mouth 20.
  • the first stop 8 is from the end face 23 of the Container mouth 20 lifted and the inner seal 4 slides along the inside 21 of the container mouth 20 in the direction of the arrow A upwards so that the sealing line 5 is disengaged with the inside 21.
  • An increased internal pressure can therefore compensated for by the ventilation recesses 11 become.
  • Between the second stop 7 and the beginning of the thread 22 is due to the thread pitch only on a short Circumferential section a sealing contact.
  • the reduction of the internal pressure is also through the ventilation slots shown in Figure 1 16 favors.
  • the axial displacement of the cap base 2 also the pressed against the outside 24 of the container mouth 20 Bead 12 relieved of pressure, so that ventilation is possible.
  • the ventilation cutouts 11 are of particular advantage, because the inner seal 4 is preloaded into the container mouth is introduced and the sealing line 5 deep in the Container mouth is arranged. Because of the ventilation cutouts 11 ventilation takes place as soon as the sealing line 5 out of engagement with the inner surface 21 of the container mouth occurs. Without ventilation cutouts 11 would Surface 10 of the inner seal 4 due to the bias also below the sealing line 5 during the axial displacement still in sealing engagement with the inside 21 of the Container mouth 20 remain.
  • the cap 1 is schematically in the Shown bottom view. Threads, stops and the outside Sealing bead 12 are omitted for simplification.
  • the ventilation cutouts 11 and the hold-open elements 13 are arranged regularly over the circumference of the inner seal 4.
  • the essence of the invention is the cap bottom 2 without Form weaknesses so that doming of the cap base, i.e. an outward curvature is made difficult or reduced. Instead, a deformable wall section 9 is in the area the cap wall 3 provided. This weakening in the area of Cap wall 3 allows axial movement of the cap base with increased internal pressure.
  • the representation shown in Figure 3 is exaggerated to illustrate the gas release process executed. In reality, the cap bottom lifts up increased internal pressure only by a small amount. Once the Internal pressure decreases again, the cap bottom 2 lowers again and the sealing cap 1 seals again. It has shown that with such arrangements, the internal pressure in the Containers on one sufficient for several weeks can be kept low. There are a lot of them of successive venting processes.
  • Essential for the degree of preload of the weakening zone 9 is the distance d between the first stop 7 and the second stop 8 compared to the axial distance d between the upper edge of the thread start 22 and the end face 23 of the container mouth 20.
  • the distance between the stops 7, 8 is 1.3 to 1.5 mm in the exemplary embodiment.
  • the Distance between the top of the thread start 22 and Front side 23 of the container mouth 20 is 1.7 mm.
  • the depth of penetration t of the sealing line 5 is depending on the content of the Container 0.8 to 1.0 mm.
  • the venting recesses 11 are at a distance of 0.2 to 0.3 mm below the sealing line 5 on the surface 10 of the Inner seal 4 arranged.
  • the ventilation cutouts 11 extend towards the lower end of the inner seal 4 at least over that part of the surface 10 of the inner seal 4, which when screwing or unscrewing the cap 1 in engagement with the inside 21 of the The container mouth can stand.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Glass Compositions (AREA)
  • Cosmetics (AREA)
  • Road Signs Or Road Markings (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The invention relates to a sealing cap (1) which has a base (2) and a skirt (3) and comprises an internal seal (4). Said internal seal is provided with ventilation recesses (11) which cancel out the sealing effect when the cap base (2) is moved axially upward. The sealing cap (1) further comprises a first stop end (7) and a second stop end (8). When the cap is unscrewed the second stop end (8) is the first to engage the opening of the container, so that a weak zone (9) in the area of the cap wall (3) is prestressed to a defined value. On the basis of the definable prestress of the weak zone (9), ventilation can be achieved at a precisely defined positive pressure.

Description

Die Erfindung betrifft eine Verschlusskappe mit den Merkmalen des Oberbegriffs von Patentanspruch 1 (siehe zum Beispiel das Dokument WO-A-95/21095).The invention relates to a closure cap with the features of the preamble of claim 1 (see for example the Document WO-A-95/21095).

Verschlusskappen aus Kunststoffmaterial werden in einer Vielzahl zum Verschliessen von Behältern, beispielsweise Getränkeflaschen eingesetzt.Caps made of plastic material are in one Variety for closing containers, for example Beverage bottles used.

Insbesondere bei kohlensäurehaltigen Getränken, aber auch bei Fruchtsäften, besteht das Problem, dass der Innendruck im Behälter im Laufe der Zeit ansteigen kann (durch Temperaturerhöhung oder Gärung). Weil Verschlusskappen normalerweise so gut wie möglich dichten sollen, um Leckagen zu vermeiden, besteht die Gefahr, dass der Behälter aufgrund eines erhöhten Innendrucks zerspringt. Vor allem bei Glasflaschen stellen herumspringende Glassplitter eine potentielle Gefahr dar.Especially with carbonated drinks, but also with Fruit juices, the problem is that the internal pressure in the Containers can rise over time (due to temperature increase or fermentation). Because caps usually should seal as well as possible to avoid leakage, there is a risk that the container due to an elevated Internal pressure bursts. Especially with glass bottles jumping glass fragments is a potential danger.

Zur Lösung dieses Problems wurden bereits verschiedene Arten von Verschlusskappen vorgeschlagen.Various types have been used to solve this problem suggested by caps.

Aus der EP-A-597 867 ist es beispielsweise bekannt, eine Verschlusskappe mit einer Dichteinlage zu versehen und gleichzeitig die Aufschraubposition der Verschlusskappe zu definieren. Bei erhöhtem Innendruck soll die Dichtscheibe komprimiert werden, und dabei als Überdruckventil wirken.From EP-A-597 867 it is known, for example, a closure cap to be provided with a sealing insert and at the same time to define the screw-on position of the sealing cap. If the internal pressure is increased, the sealing washer should be compressed and act as a pressure relief valve.

Aus der EP-A-464 384 ist ein selbstentlüftender Flaschenverschluss bekannt, bei welchem durch Schwächungen in der Kopfplatte die Dichtwirkung bei erhöhtem Innendruck aufgehoben werden soll.EP-A-464 384 discloses a self-venting bottle cap known, due to weaknesses in the top plate the sealing effect is canceled with increased internal pressure shall be.

Aus der DE-A-196 13 830 ist ein selbstentlüftender Verschluss bekannt, bei welchem der Kappenboden geschwächt ist. Die Schwächung führt dazu, dass bei erhöhtem Innendruck der Kappenboden nach aussen gewölbt wird (sogenanntes doming) und dass dabei eine einstückig mit dem Kappenboden ausgebildete Innendichtung druckentlastet wird.DE-A-196 13 830 describes a self-venting closure known in which the cap base is weakened. The Weakening leads to the fact that the The base of the cap is arched outwards (so-called doming) and that it is formed in one piece with the cap base Inner seal is relieved of pressure.

Alle diese bekannten Lösungen weisen aber bestimmte Nachteile auf. Der Grad der Kompression einer eingelegten Dichtscheibe lässt sich nur schwierig kontrollieren. Ausserdem ist die Anpressung der Dichtscheibe über den ganzen Umfang der Behältermündung homogen, so dass die genaue Kontrolle des Entlüftungsvorgangs schwierig ist.However, all of these known solutions have certain disadvantages on. The degree of compression of an inserted sealing washer is difficult to control. In addition, the Pressing the sealing washer over the entire circumference of the container mouth homogeneous, so that the precise control of the venting process is difficult.

Bei mit Schwächungen in der Kopfplatte versehenen Verschlusskappen besteht das Problem, dass eine Innendichtung aufgrund des Domings druckentlastet werden kann, dass aber Dichtungen, welche am oberen Mündungsrand und vor allem aussen an der Behältermündung dichten, dadurch nicht druckentlastet werden.With sealing caps with weaknesses in the top plate there is a problem that due to an inner seal of the doming can be relieved of pressure, but that seals, which on the upper edge of the mouth and especially on the outside Seal the container mouth so that it is not relieved of pressure.

Es ist eine Aufgabe der Erfindung, die Nachteile des Bekannten zu vermeiden, insbesondere also eine Verschlusskappe zu schaffen, welche bei optimaler Dichtigkeit unter Normalbedingungen ein zuverlässiges und genau kontrollierbares Entlüften bei erhöhtem Innendruck im von der Verschlusskappe verschlossenen Behälter ermöglicht. Die Verschlusskappe soll einfach und wirtschaftlich herstellbar sein und mit üblichen Aufschraubvorrichtungen aufschraubbar sein.It is an object of the invention to overcome the disadvantages of the known to avoid, in particular a closure cap create which with optimal tightness under normal conditions reliable and precisely controllable venting with increased internal pressure in the closed by the cap Container allows. The cap should be simple and be economical to produce and with conventional screwing devices be screwable.

Erfindungsgemäss werden diese Aufgaben mit einer Verschlusskappe mit den Merkmalen des kennzeichnenden Teils von Patentanspruch 1 gelöst.According to the invention, these tasks are performed with a sealing cap with the features of the characterizing part of claim 1 solved.

Die Verschlusskappe besteht im wesentlichen aus einem Kappenboden und einer Kappenwand. Am Kappenboden ist eine umlaufende Innendichtung vorgesehen. Die Dichtung ist mit einer Dichtlinie versehen, welche gegen die Innenseite der Behältermündung anpressbar ist und dabei eine Dichtwirkung erzielt. The cap essentially consists of a cap base and a cap wall. There is a circumferential one on the cap bottom Internal seal provided. The seal is with a Seal line, which against the inside of the container mouth can be pressed and achieves a sealing effect.

Die Verschlusskappe kann mit an der Innenseite der Kappenwand angeordneten Rückhalteelementen, beispielsweise einem Schraubgewinde, auf der Behältermündung gehalten werden.The cap can also be on the inside of the cap wall arranged retaining elements, for example one Screw thread, are held on the container mouth.

Die Verschlusskappe weist einen ersten Anschlag auf, welcher etwa vom Boden der Verschlusskappe entspringt.The closure cap has a first stop, which arises approximately from the bottom of the cap.

Erfindungsgemäss ist axial zwischen den Rückhalteelementen und dem ersten Anschlag ein zweiter Anschlag zum Begrenzen der Aufschraubbewegung der Verschlusskappe angeordnet. Der zweite Anschlag kann beispielsweise mit dem Anfang eines Gewindes an der Behältermündung in Eingriff treten und so die Aufschraubbewegung begrenzen. Der zweite Anschlag ist vorteilhaft als umlaufender Ring ausgebildet, dessen Anschlagebene etwa senkrecht zur Achse der Verschlusskappe verläuft.According to the invention is axially between the retaining elements and the first stop a second stop to limit the screwing movement of the cap is arranged. The second stop can start with, for example Engage threads on the container mouth and so the Limit unscrewing movement. The second stop is advantageous formed as a circumferential ring, the stop plane runs approximately perpendicular to the axis of the closure cap.

Die Kappenwand ist ausserdem mit einem verformbaren Wandabschnitt versehen. Der verformbare Wandabschnitt ist zwischen dem ersten und dem zweiten Anschlag angeordnet. Die Verformbarkeit kann durch eine Schwächung der Wanddicke im Bereich des Wandabschnittes erzielt werden, beispielsweise durch eine Vertiefung auf der Innenseite der Kappenwand.The cap wall is also with a deformable wall section Mistake. The deformable wall section is between arranged the first and the second stop. The Deformability can be achieved by weakening the wall thickness in the Area of the wall section can be achieved, for example through a recess on the inside of the cap wall.

Die Erfinder der vorliegenden Erfindung haben festgestellt, dass eine Schwächung der Verschlusskappe im Bereich der Kappenwand gegenüber bekannten Schwächungen im Kappenboden überraschende Vorteile aufweist. Ein erhöhter Innendruck in dem von der Verschlusskappe verschlossenen Behälter führt nicht in erster Linie zu einer Wölbung des Kappenbodens, sondern zu einer axialen Verschiebung des Kappenbodens. Die Bewegung ist also im wesentlichen linear. Dies bedeutet, dass allfällige Dichtungen an der Aussenseite oder an der Stirnseite der Behältermündung aufgrund der axialen Translationsbewegung des Kappenbodens ebenfalls ausser Dichteingriff geraten. Selbstverständlich kann nach wie vor eine bestimmte Krümmung auftreten. The inventors of the present invention have found that a weakening of the closure cap in the area of the Cap wall compared to known weaknesses in the cap base has surprising advantages. An increased internal pressure in the container closed by the cap not primarily a curvature of the cap base, but an axial displacement of the cap base. The So movement is essentially linear. This means that any seals on the outside or on the front the container mouth due to the axial translation movement of the cap bottom also out of sealing engagement devices. Of course, there can still be a specific one Curvature occur.

Damit die Verschlusskappe zum richtigen Zeitpunkt entlüftet, ist der axiale Abstand zwischen dem ersten und dem zweiten Anschlag einerseits und die Eindringtiefe der Dichtlinie andererseits derart gewählt, dass die Dichtlinie bei einem vorbestimmten Innendruck ausser Eingriff mit der Innenseite der Behältermündung gerät. Dieser Minimaldruck ist je nach Füllgut im Behälter unterschiedlich. Bei Fruchtsäften liegt er etwa bei 2 bar, bei leicht CO2-haltigen Getränken bei 5 bar und bei einem Inhalt mit 4 Vol.% CO2 oberhalb 8 bar. Der Grad der Verformbarkeit des Wandabschnittes wird ebenfalls entsprechend ausgewählt.So that the closure cap is vented at the right time, the axial distance between the first and the second stop on the one hand and the depth of penetration of the sealing line on the other hand are selected such that the sealing line disengages from the inside of the container mouth at a predetermined internal pressure. This minimum pressure varies depending on the contents in the container. In the case of fruit juices it is around 2 bar, in the case of beverages with a low CO 2 content it is 5 bar and in the case of a content with 4 vol.% CO 2 it is above 8 bar. The degree of deformability of the wall section is also selected accordingly.

Der erste Anschlag gerät beim Aufschrauben in Eingriff mit der Oberseite der Behältermündung bevor der zweite Anschlag mit dem Gewindeanfang in Eingriff gerät.The first stop engages when screwed on the top of the tank mouth before the second stop engages with the start of the thread.

Dazwischen wird der erste Anschlag und der verformbare Wandbereich aufgrund der Aufschraubbewegung verformt.In between is the first stop and the deformable wall area deformed due to the unscrewing movement.

Die Eindringtiefe der Dichtlinie bezeichnet den axialen Abstand der Dichtlinie von dem ersten Anschlag in deformierten Zustand bzw. den Abstand der Dichtlinie von der Oberseite der Behältermündung.The penetration depth of the sealing line denotes the axial one Distance of the sealing line from the first stop in deformed Condition or distance of the sealing line from the top the container mouth.

Durch die gezielte Wahl des Abstandes zwischen den Anschlägen und der Verformbarkeit des Wandabschnittes wird der verformbare Wandabschnitt beim Aufschrauben des Verschlusses in der Art einer Feder auf einen vorbestimmten Wert vorgespannt. Durch geeignete Wahl der Eindringtiefe der Dichtlinie ist der Zeitpunkt des Entlüftens vorbestimmbar. Wenn der Innendruck so gross ist, dass der Kappenboden gegen die Federkraft um die Eindringtiefe verschoben wird, entlüftet der Verschluss.Through the targeted choice of the distance between the stops and the deformability of the wall section becomes the deformable Wall section when screwing on the lock in the Type of spring biased to a predetermined value. By a suitable choice of the penetration depth of the sealing line, the Predeterminable time of venting. If the inside pressure is so large that the cap bottom turns against the spring force the depth of penetration is shifted, the closure vents.

Die Verformbarkeit wird für Normalbedingung eingestellt, d.h. für Temperaturen im Bereich von 15 - 35° C. Wenn die Aussentemperatur diese Werte übersteigt, wird die Verformbarkeit grösser (Erweichung des Plastikmaterials). Die Entlüftungsfunktion wird also bei höherer Temperatur begünstigt.The deformability is set for normal conditions, i.e. for temperatures in the range of 15 - 35 ° C. If the outside temperature If these values are exceeded, the deformability larger (softening of the plastic material). The venting function is therefore favored at a higher temperature.

Die beiden Anschläge dienen zum genau definierten Vorspannen der Schwächungszone in der Kappenwand. Dabei kann ein genau vordefinierter Entlüftungsdruck eingestellt werden.The two stops serve for precisely defined pretensioning the weakening zone in the cap wall. One can do exactly that predefined ventilation pressure can be set.

Die Innendichtung weist ausserdem vorteilhaft auf ihrer der Kappenschürze zugewandten Seite Entlüftungsaussparungen auf. Die Entlüftungsaussparungen sind unterhalb der Dichtlinie angeordnet. Die Innendichtung ist vorteilhaft als sogenannte Olivendichtung ausgebildet. Dies bedeutet, dass die Dichtlinie einen maximalen äusseren Durchmesser der Innendichtung definiert und beabstandet zur Innenseite des Kappenbodens angeordnet ist. Solche Olivendichtungen haben den Vorteil, im Innern der Behältermündung zu dichten, wo normalerweise eine genau definierte Dichtfläche ohne Beschädigungen zu finden ist. Der Nachteil von solchen Olivendichtungen ist aber, dass sie aufgrund der Vorspannung bereits dichten, wenn sich die Verschlusskappe nicht in der aufgesetzten Stellung befindet, sondern axial leicht oberhalb der Dichtstellung. Dank der Entlüftungsaussparungen, die vorteilhaft unmittelbar unterhalb der Dichtlinie beginnen, wird die Dichtwirkung aufgehoben, sobald die Dichtlinie ausserhalb der Behältermündung liegt. Eine Verlängerung der Dichtwirkung aufgrund einer Verschiebung der Dichtlinie über die sich nach unten konisch verjüngende Innendichtung wird damit verhindert.The inner seal also advantageously points to the Ventilation cutouts on the side facing the cap apron. The ventilation cutouts are below the sealing line arranged. The inner seal is advantageous as a so-called Olive seal trained. This means that the sealing line a maximum outer diameter of the inner seal defined and spaced from the inside of the cap base is arranged. Such olive seals have the advantage in Seal inside the container mouth, where normally one to find a precisely defined sealing surface without damage is. The disadvantage of such olive seals is that they already seal due to the preload when the Sealing cap is not in the attached position, but axially slightly above the sealing position. thanks to the Ventilation recesses, which are advantageous immediately below start the sealing line, the sealing effect is canceled, as soon as the sealing line outside the container mouth lies. An extension of the sealing effect due to a shift the sealing line over which is tapered down This prevents a tapering inner seal.

Die Verschlusskappe kann ausserdem mit einem umlaufenden Dichtwulst versehen sein, der gegen die Aussenseite der Behältermündung anpressbar ist. Der Dichtwulst ist axial zwischen dem ersten und zweiten Anschlag angeordnet.The cap can also with a circumferential Be sealing bead provided against the outside of the Container mouth can be pressed. The sealing bead is axial arranged between the first and second stop.

Die Verschlusskappe ist ausserdem vorteilhaft mit Offenhaltelementen versehen. Solche Offenhaltelemente können beispielsweise oberhalb der Dichtlinie auf der der Kappenwand zugewandten Oberfläche der Innendichtung vorgesehen sein. Die Offenhaltelemente vermeiden ein Verschieben der Dichtlinie. Wenn es bei erhöhtem Innendruck dennoch zu einem Doming des Kappenbodens kommen sollte, stützen sich die Offenhaltelemente auf der Behältermündung ab, so dass die Lage der Innendichtung in Bezug auf die Behältermündung im wesentlichen nur durch Translation verändert wird. Offenhaltelemente können selbstverständlich an den übrigen Dichtelementen, insbesondere an dem als Dichtung wirkenden zweiten Anschlag oder an dem obtionalen gegen die Aussenseite des Behälters anpressbaren ringförmigen Wulst.The closure cap is also advantageous with hold-open elements Mistake. Such hold-open elements can, for example above the sealing line on the cap wall facing surface of the inner seal may be provided. The Keep-open elements prevent the sealing line from shifting. If there is still doming of the internal pressure If the bottom of the cap comes, the hold-open elements are supported on the container mouth, so the location of the inner seal with respect to the container mouth essentially only is changed by translation. Can keep open of course on the other sealing elements, in particular on the second stop acting as a seal or on the optional against the outside of the container annular bead.

Die Erfindung wird im Folgenden in Ausführungsbeispielen und anhand der Zeichnungen näher erläutert:The invention is described below in exemplary embodiments and explained in more detail using the drawings:

Es zeigen:

Figur 1
einen Querschnitt durch eine erfindungsgemässe Verschlusskappe,
Figur 2
einen vergrösserten Ausschnitt der Dichtpartie einer Verschlusskappe auf einer Behältermündung,
Figur 3
eine vergrösserte Darstellung der Dichtpartie eines Verschlusses auf einem Behälter mit erhöhtem Innendruck und
Figur 4
eine schematische Darstellung einer Untenansicht einer Verschlusskappe.
Show it:
Figure 1
3 shows a cross section through a closure cap according to the invention,
Figure 2
an enlarged section of the sealing part of a closure cap on a container mouth,
Figure 3
an enlarged view of the sealing part of a closure on a container with increased internal pressure and
Figure 4
is a schematic representation of a bottom view of a closure cap.

Figur 1 zeigt eine Verschlusskappe 1, welche im wesentlichen aus einem Kappenboden 2 und einer Kappenwand 3 besteht. Die Kappenwand 3 ist mit einem Schraubgewinde 6 versehen, mit welchem die Verschlusskappe 1 auf eine Behältermündung 20 aufgeschraubt werden kann. Figure 1 shows a cap 1, which essentially consists of a cap base 2 and a cap wall 3. The Cap wall 3 is provided with a screw thread 6, with which the cap 1 on a container mouth 20th can be screwed on.

An der Innenseite des Kappenbodens 2 ist eine Innendichtung 4 in der Form einer umlaufenden Dichtlippe angeordnet. Die Innendichtung 4 ist als sogenannte Olivendichtung ausgebildet. Die Innendichtung 4 weist eine Dichtlinie 5 auf, welche gegen die Innenseite einer Behältermündung anpressbar ist. Die Dichtlinie 5 ist im Abstand zur Innenseite des Kappenbodens 2 angeordnet und definiert den maximalen Aussendurchmesser der der Kappenschürze 3 zugewandten Oberfläche 10 der Innendichtung 4.On the inside of the cap base 2 there is an inner seal 4 arranged in the form of a circumferential sealing lip. The Inner seal 4 is designed as a so-called olive seal. The inner seal 4 has a sealing line 5, which can be pressed against the inside of a container mouth. The sealing line 5 is at a distance from the inside of the cap base 2 arranged and defines the maximum outer diameter the surface 10 of the cap apron 3 facing the Inner seal 4.

Die Innendichtung 4 ist unterhalb der Dichtlinie 5 mit Entlüftungsaussparungen 11 versehen, welche auf der Oberfläche 10 angeordnet sind.The inner seal 4 is below the sealing line 5 with ventilation cutouts 11 provided which on the surface 10 are arranged.

Auf der Innenseite des Kappenbodens 2 ist ein erster Anschlag 8 vorgesehen. Der erste Anschlag 8 ist als umlaufender Wulst ausgebildet, der gleichzeitig eine Dichtfunktion hat.There is a first stop on the inside of the cap base 2 8 provided. The first stop 8 is a circumferential bead trained who also has a sealing function.

Oberhalb des Endes des Gewindes 6 ist ein zweiter Anschlag 7 an der Innenseite der Kappenwand 3 oberhalb des Gewindes 6 angeordnet. Der Anschlag 7 weist eine Anschlagebene auf, die etwa senkrecht zur Achse der Verschlusskappe verläuft. Die Anschläge 7, 8 sind in axialer Richtung um einen vorbestimmbaren Abstand d beabstandet.A second stop 7 is located above the end of the thread 6 on the inside of the cap wall 3 above the thread 6 arranged. The stop 7 has a stop plane that runs approximately perpendicular to the axis of the closure cap. The Stops 7, 8 are predeterminable in the axial direction Distance d spaced.

Zwischen dem ersten Anschlag 8 und dem zweiten Anschlag 7 ist die Kappenwand 3 mit einem verformbaren Wandbereich 9 versehen.Is between the first stop 8 and the second stop 7 the cap wall 3 is provided with a deformable wall area 9.

Auf der Oberfläche 10 der Innendichtung 4 sind ausserdem Offenhaltelemente 13 angeordnet, welche sicherstellen, dass sich die Dichtlinie 5 der Innendichtung 4 nicht verschiebt, d.h. dass die Innendichtung 4 nur im Bereich der Dichtlinie 5 dichtend an der Innenseite der Behältermündung anliegen kann.On the surface 10 of the inner seal 4 are also Open hold elements 13 are arranged, which ensure that the sealing line 5 of the inner seal 4 does not shift, i.e. that the inner seal 4 only in the area of the sealing line 5 can be sealed against the inside of the container mouth.

Die Aussenseite der Kappenschürze 3 ist ausserdem mit einer Riffelung bzw. mit Rippen 14 versehen, welche der Kappenwand 3 unterhalb der Schwächungszone 9 eine ausreichende Festigkeit und gute Griffeigenschaften verleihen.The outside of the cap apron 3 is also with a Corrugation or provided with ribs 14, which the cap wall 3 below the weakening zone 9 sufficient strength and give good grip properties.

Die Verschlusskappe 1 kann ausserdem mit einem Garantieband 15 und mit vertikalen Entlüftungsschlizen 16 versehen sein, die das Gewinde 6 unterbrechen. Solche Garantiebänder und Entlüftungsschlitze sind dem Fachmann bekannt.The cap 1 can also with a guarantee tape 15 and be provided with vertical ventilation slats 16, which interrupt the thread 6. Such guarantee tapes and Vent slots are known to those skilled in the art.

In Figur 2 ist die Dichtpartie der Verschlusskappe gemäss Figur 1 vergrösstert dargestellt. Wenn die Verschlusskappe 1 auf eine Behältermündung 20 aufgeschraubt wird, gerät zuerst der erste Anschlag 8 mit der Stirnseite 23 der Behältermündung 20 in Eingriff. Durch weiteres Aufschrauben wird die Kappenwand 3 im Bereich des verformbaren Wandabschnittes 9 solange axial verformt, bis der zweite Anschlag 7 mit dem Gewindeanfang 22 der Behältermündung 20 in Eingriff tritt. In vollständig aufgesetztem Zustand ist also der verformbare Wandbereich 9 auf einen genau vorbestimmten Wert vorgespannt.In Figure 2, the sealing part of the closure cap is according to Figure 1 is shown enlarged. If the cap 1 is screwed onto a container mouth 20, comes first the first stop 8 with the end face 23 of the container mouth 20 engaged. By further screwing on the Cap wall 3 in the region of the deformable wall section 9 deformed axially until the second stop 7 with the Thread start 22 of the container mouth 20 engages. In the fully applied state is the deformable one Wall area 9 biased to a precisely predetermined value.

Gleichzeitig dichtet ein umlaufender Dichtwulst 12 gegen die Aussenseite 24 der Behältermündung 20. Auf der Innenseite 21 der Behältermündung 20 liegt die Innendichtung 4 mit der Dichtlinie 5 dichtend an. Die Dichtlinie 5 hat eine durch die relative Lage zum zweiten Anschlag 7 vorbestimmte Eindringtiefe t in der Behältermündung.At the same time, a circumferential sealing bead 12 seals against the Outside 24 of the container mouth 20. On the inside 21 the container mouth 20 is the inner seal 4 with the Sealing line 5 sealing. The sealing line 5 has a through relative position to the second stop 7 predetermined penetration depth t in the tank mouth.

Sobald im mit der Verschlusskappe 1 verschlossenen Behälter der Innendruck steigt, wird der Kappenboden 2 in axialer Richtung A nach oben verschoben (siehe Figur 3). Die axiale Verschiebung des Kappenbodens 2 wird durch den verformbaren Wandabschnitt 9 begünstigt. Der zweite Anschlag 7 bleibt dabei in Eingriff mit dem Gewindeanfang 22 der Behältermündung 20. Der erste Anschlag 8 wird von der Stirnseite 23 der Behältermündung 20 abgehoben und die Innendichtung 4 gleitet entlang der Innenseite 21 der Behältermündung 20 in Pfeilrichtung A nach oben, sodass die Dichtlinie 5 ausser Eingriff mit der Innenseite 21 gerät. Ein erhöhter Innendruck kann deshalb durch die Entlüftungsaussparungen 11 ausgeglichen werden. Zwischen dem zweiten Anschlag 7 und dem Gewindeanfang 22 besteht aufgrund der Gewindesteigung nur auf einem kurzen Umfangsabschnitt ein dichtender Kontakt. Der Abbau des Innendrucks wird ausserdem durch die in Figur 1 gezeigten Entlüftungsschlitze 16 begünstigt.As soon as in the container closed with the cap 1 the internal pressure increases, the cap base 2 becomes axial Direction A shifted up (see Figure 3). The axial Displacement of the cap base 2 is due to the deformable Wall section 9 favors. The second stop 7 remains thereby engaging with the thread beginning 22 of the container mouth 20. The first stop 8 is from the end face 23 of the Container mouth 20 lifted and the inner seal 4 slides along the inside 21 of the container mouth 20 in the direction of the arrow A upwards so that the sealing line 5 is disengaged with the inside 21. An increased internal pressure can therefore compensated for by the ventilation recesses 11 become. Between the second stop 7 and the beginning of the thread 22 is due to the thread pitch only on a short Circumferential section a sealing contact. The reduction of the internal pressure is also through the ventilation slots shown in Figure 1 16 favors.

Durch die axiale Verschiebung des Kappenbodens 2 wird auch der gegen die Aussenseite 24 der Behältermündung 20 angepresste Wulst 12 druckentlastet, sodass eine Entlüftung möglich ist.The axial displacement of the cap base 2 also the pressed against the outside 24 of the container mouth 20 Bead 12 relieved of pressure, so that ventilation is possible.

Die Entlüftungsaussparungen 11 sind von besonderem Vorteil, weil die Innendichtung 4 unter Vorspannung in die Behältermündung eingeführt wird und die Dichtlinie 5 tief in der Behältermündung angeordnet ist. Aufgrund der Entlüftungsaussparungen 11 findet eine Entlüftung statt, sobald die Dichtlinie 5 ausser Eingriff mit der Innenfläche 21 der Behältermündung tritt. Ohne Entlüftungsaussparungen 11 würde die Oberfläche 10 der Innendichtung 4 aufgrund der Vorspannung auch unterhalb der Dichtlinie 5 während der axialen Verschiebung noch in dichtendem Eingriff mit der Innenseite 21 der Behältermündung 20 bleiben.The ventilation cutouts 11 are of particular advantage, because the inner seal 4 is preloaded into the container mouth is introduced and the sealing line 5 deep in the Container mouth is arranged. Because of the ventilation cutouts 11 ventilation takes place as soon as the sealing line 5 out of engagement with the inner surface 21 of the container mouth occurs. Without ventilation cutouts 11 would Surface 10 of the inner seal 4 due to the bias also below the sealing line 5 during the axial displacement still in sealing engagement with the inside 21 of the Container mouth 20 remain.

Das Offenhaltelement 13 bzw. die Offenhaltelemente 13 stellen eine geradlinige Verschiebung des Kappenbodens 2 sicher und vermeiden, dass die Innendichtung 4 eine Kippbewegung durchführt, d.h. sich über die oberhalb der Dichtlinie 5 liegende Oberfläche abrollt.Set the hold-open element 13 or the hold-open elements 13 a straight displacement of the cap bottom 2 safely and prevent the inner seal 4 from tilting, i.e. over the lying above the sealing line 5 Surface rolls.

In Figur 4 ist die Verschlusskappe 1 schematisch in der Unteransicht dargestellt. Gewinde, Anschläge und der aussenliegende Dichtwulst 12 sind zur Vereinfachung weggelassen. Die Entlüftungsaussparungen 11 und die Offenhaltelemente 13 sind regelmässig über den Umfang der Innendichtung 4 angeordnet.In Figure 4, the cap 1 is schematically in the Shown bottom view. Threads, stops and the outside Sealing bead 12 are omitted for simplification. The ventilation cutouts 11 and the hold-open elements 13 are arranged regularly over the circumference of the inner seal 4.

Der Kern der Erfindung besteht darin, den Kappenboden 2 ohne Schwächungen auszubilden, sodass ein Doming des Kappenbodens, d.h. eine Auswärtswölbung erschwert oder verringert wird. Statt dessen ist ein verformbarer Wandabschnitt 9 im Bereich der Kappenwand 3 vorgesehen. Diese Schwächung im Bereich der Kappenwand 3 erlaubt eine axiale Bewegung des Kappenbodens bei erhöhtem Innendruck. Die in Figur 3 gezeigte Darstellung ist zur Verdeutlichung des Gasablassvorgangs übertrieben ausgeführt. In der Realität hebt sich der Kappenboden bei erhöhtem Innendruck nur um einen geringen Betrag. Sobald der Innendruck wieder kleiner wird, senkt sich der Kappenboden 2 wieder und die Verschlusskappe 1 dichtet wieder. Es hat sich gezeigt, dass mit derartigen Anordnungen der Innendruck im Behältern über mehrere Wochen hinweg auf einem ausreichend niedrigen Wert gehalten werden kann. Dabei sind eine Vielzahl von nacheinander folgenden Entlüftungsprozessen zu beobachten.The essence of the invention is the cap bottom 2 without Form weaknesses so that doming of the cap base, i.e. an outward curvature is made difficult or reduced. Instead, a deformable wall section 9 is in the area the cap wall 3 provided. This weakening in the area of Cap wall 3 allows axial movement of the cap base with increased internal pressure. The representation shown in Figure 3 is exaggerated to illustrate the gas release process executed. In reality, the cap bottom lifts up increased internal pressure only by a small amount. Once the Internal pressure decreases again, the cap bottom 2 lowers again and the sealing cap 1 seals again. It has shown that with such arrangements, the internal pressure in the Containers on one sufficient for several weeks can be kept low. There are a lot of them of successive venting processes.

Wesentlich für den Grad der Vorspannung der Schwächungszone 9 ist der Abstand d zwischen dem ersten Anschlag 7 und dem zweiten Anschlag 8 im Vergleich zum axialen Abstand d zwischen der Oberkante des Gewindeanfangs 22 und der Stirnseite 23 der Behältermündung 20. Der Abstand zwischen den Anschlägen 7, 8 beträgt im Ausführungsbeispiel 1,3 bis 1,5 mm. Der Abstand zwischen der Oberkante des Gewindeanfangs 22 und der Stirnseite 23 der Behältermündung 20 beträgt 1,7 mm. Die Eindringtiefe t der Dichtlinie 5 beträgt je nach Inhalt des Behälters 0,8 bis 1,0 mm.Essential for the degree of preload of the weakening zone 9 is the distance d between the first stop 7 and the second stop 8 compared to the axial distance d between the upper edge of the thread start 22 and the end face 23 of the container mouth 20. The distance between the stops 7, 8 is 1.3 to 1.5 mm in the exemplary embodiment. The Distance between the top of the thread start 22 and Front side 23 of the container mouth 20 is 1.7 mm. The depth of penetration t of the sealing line 5 is depending on the content of the Container 0.8 to 1.0 mm.

Die Entlüfutungsaussparungen 11 sind in einem Abstand von 0,2 bis 0,3 mm unter der Dichtlinie 5 auf der Oberfläche 10 der Innendichtung 4 angeordnet. Die Entlüftungsaussparungen 11 erstrecken sich gegen das untere Ende der Innendichtung 4 wenigstens über denjenigen Teil der Oberfläche 10 der Innendichtung 4, welcher beim Aufschrauben oder beim Abschrauben der Verschlusskappe 1 im Eingriff mit der Innenseite 21 der Behältermündung stehen kann.The venting recesses 11 are at a distance of 0.2 to 0.3 mm below the sealing line 5 on the surface 10 of the Inner seal 4 arranged. The ventilation cutouts 11 extend towards the lower end of the inner seal 4 at least over that part of the surface 10 of the inner seal 4, which when screwing or unscrewing the cap 1 in engagement with the inside 21 of the The container mouth can stand.

Claims (8)

  1. A closure cap (1) with a cap base (1) and with a cap wall (3)
    with a circumferential inner seal (4) rising from the cap base (2), with a sealing line (5) which with a screwed-on closure cap can be brought into engagement with the inner side (21) of a container opening (20),
    and with retaining elements (6) arranged on the cap wall (3), for retaining the closure cap (1) on the container opening (20),
    whereby the closure cap (1) comprises a first abutment (8) which rises from the cap base (2), and whereby
    the closure cap (1) comprises a second abutment (7) axially arranged between the retaining elements (6) and the first abutment (8), for limiting the screwing-on movement,
    characterized in that the cap wall (3) is provided with a deformable wall section (9) which is axially arranged between the first abutment (8) and the second abutment (7), wherein the distance (d) between the first abutment (8) and the second abutment (7), the penetration depth (t) of the sealing line (5) and the degree of deformability of the wall section are selected in a manner such that the sealing line (5) at a predeterminable inner pressure can be brought out of sealing engagement with the inner side (2) of the container opening.
  2. A closure cap according to claim 1, characterised in that the first abutment (8) and the second abutment (7) are arranged in a manner such that the second abutment (7) can be brought into engagement with the beginning (22) of the thread of the container opening (20) after the first abutment (8) can be brought into engagement with the end-face side (23) of the container opening (20).
  3. A closure cap according to one of the claims 1 or 2, characterised in that the inner seal (4) on its surface (10) facing the cap wall comprises at least one venting relief (11) arranged below the sealing line (5).
  4. A closure cap according to claim 3, characterised in that the venting relief (11) begins directly below the sealing line (5) and extends towards the end of the inner seal (4).
  5. A closure cap according to one of the claims 1 to 4, characterised in that the closure cap comprises a circumferential sealing bulge (12) which is axially arranged between the first abutment (7) and the second abutment (8) and which can be pressed against the outer side (24) of the container opening (20).
  6. A closure cap according to one of the claims 1 to 5, characterised in that the surface (10) of the inner seal (4), which faces the cap skirt (3), comprises at least one retaining-open element (13) which is axially arranged above the sealing line (5).
  7. A closure cap according to one of the claims 1 to 6, characterised in that the deformable wall section (9) is formed by a weakening of the wall thickness, preferably by a deepening on the inner side of the cap wall (3).
  8. A packaging with a closure cap according to one of the claims 1 to 7 with a container with a container opening with a thread, wherein the container opening comprises an end-face side (23) with which the first abutment (8) can be brought into engagement, wherein the thread comprises a start (22) with which the second abutment (7) of the closure cap can be brought into engagement, and wherein the axial distance (d') between the end-face side (23) and the beginning (22) of the thread is larger than the axial distance (d) between the first abutment (8) and the second abutment (7).
EP99944396A 1998-08-22 1999-08-14 Sealing cap Expired - Lifetime EP1105318B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP99944396A EP1105318B1 (en) 1998-08-22 1999-08-14 Sealing cap

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP98115875A EP0982234A1 (en) 1998-08-22 1998-08-22 Closure cap
EP98115875 1998-08-22
EP99944396A EP1105318B1 (en) 1998-08-22 1999-08-14 Sealing cap
PCT/EP1999/005970 WO2000010888A1 (en) 1998-08-22 1999-08-14 Sealing cap

Publications (2)

Publication Number Publication Date
EP1105318A1 EP1105318A1 (en) 2001-06-13
EP1105318B1 true EP1105318B1 (en) 2002-10-02

Family

ID=8232499

Family Applications (2)

Application Number Title Priority Date Filing Date
EP98115875A Withdrawn EP0982234A1 (en) 1998-08-22 1998-08-22 Closure cap
EP99944396A Expired - Lifetime EP1105318B1 (en) 1998-08-22 1999-08-14 Sealing cap

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP98115875A Withdrawn EP0982234A1 (en) 1998-08-22 1998-08-22 Closure cap

Country Status (8)

Country Link
US (1) US6679395B1 (en)
EP (2) EP0982234A1 (en)
AT (1) ATE225289T1 (en)
AU (1) AU5734799A (en)
BR (1) BR9913219A (en)
DE (1) DE59902970D1 (en)
ES (1) ES2185397T3 (en)
WO (1) WO2000010888A1 (en)

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ES2185397T3 (en) 2003-04-16
DE59902970D1 (en) 2002-11-07
AU5734799A (en) 2000-03-14
US6679395B1 (en) 2004-01-20
ATE225289T1 (en) 2002-10-15
WO2000010888A1 (en) 2000-03-02
BR9913219A (en) 2001-05-22
EP1105318A1 (en) 2001-06-13
EP0982234A1 (en) 2000-03-01

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