EP0714368A1 - Closure cap with warranty ring - Google Patents

Closure cap with warranty ring

Info

Publication number
EP0714368A1
EP0714368A1 EP95918496A EP95918496A EP0714368A1 EP 0714368 A1 EP0714368 A1 EP 0714368A1 EP 95918496 A EP95918496 A EP 95918496A EP 95918496 A EP95918496 A EP 95918496A EP 0714368 A1 EP0714368 A1 EP 0714368A1
Authority
EP
European Patent Office
Prior art keywords
ring
guarantee
container
cap
predetermined breaking
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.)
Granted
Application number
EP95918496A
Other languages
German (de)
French (fr)
Other versions
EP0714368B1 (en
Inventor
Georg Pfefferkorn
Michael Kirchgessner
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.)
Crown Cork AG
Original Assignee
Crown Cork AG
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 AG filed Critical Crown Cork AG
Publication of EP0714368A1 publication Critical patent/EP0714368A1/en
Application granted granted Critical
Publication of EP0714368B1 publication Critical patent/EP0714368B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B65D41/32—Caps or cap-like covers with lines of weakness, tearing-strips, tags, or like opening or removal devices, e.g. to facilitate formation of pouring openings
    • B65D41/34—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt
    • 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
    • B65D41/32—Caps or cap-like covers with lines of weakness, tearing-strips, tags, or like opening or removal devices, e.g. to facilitate formation of pouring openings
    • B65D41/34—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt
    • B65D41/3442—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with rigid bead or projections formed on the tamper element and coacting with bead or projections on the container
    • B65D41/3447—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with rigid bead or projections formed on the tamper element and coacting with bead or projections on the container the tamper element being integrally connected to the closure by means of bridges

Definitions

  • the invention relates to a closure cap made of plastic material with a guarantee ring, according to the preamble of claim 1.
  • closure caps are preferably designed as screw caps and used for closing container mouths with an external thread.
  • the guarantee ring engages under a mostly ring-shaped projection at the container mouth, which leads to the guarantee ring being torn off when the container is opened for the first time.
  • Such guarantee closures are used, for example, to securely close beverage bottles. The condition of the guarantee ring lets consumers know whether the container has already been opened.
  • a closure cap of the type mentioned is known from US Pat. No. 4,147,268, which has an additional protective ring.
  • This protective ring is firmly connected to the cap wall at its upper end. From there it extends down to the upper end of the guarantee ring and protects the webs connecting the guarantee ring to the cap wall against manipulation.
  • the guarantee ring itself and in particular its lower part, which extends under the container mouth, is still directly accessible from the outside. Attempts which are aimed at opening the container unnoticed by manipulation of the guarantee ring are carried out by does not hinder the guard ring. Z are conceivable.
  • B. Dehnver ⁇ with the aim of bringing the guarantee ring when opening the container undamaged over the projection of the container mouth.
  • the sealing cap consists of a cap base and an adjoining, usually cylindrical cap wall. It is predominantly designed as a screw cap, the inside of the cap wall having a screw thread which, when the container is closed, is brought into engagement with a corresponding external thread of the container mouth. However, other locking systems such as bayonet or snap locks can also be used.
  • the cap wall is connected at its lower edge facing away from the cap base with a tear-off guarantee ring. When the container is closed, this engages under a mostly ring-shaped projection on the container neck.
  • the tear-off connection between the guarantee ring and the cap wall generally consists of individual predetermined breaking webs distributed over the circumference or, for example, also of a predetermined breaking connection, with a wall section with a reduced wall thickness, for example a film that is thinned into a film, when the closure is opened for the first time travels.
  • the guarantee ring can also be firmly connected to the cap wall by one or more wide webs and at the same time have a predetermined breaking point with a reduced guarantee ring cross-section on its circumference.
  • Such guarantee strips are known in a large number of embodiments; they remain even after the container has been opened due to the wider connecting webs with the Cap wall connected and are therefore preferably used for closing reusable containers (eg deposit bottles).
  • guarantee rings already offer a certain degree of protection against unauthorized manipulation, since there is a risk of stretching attempts that the predetermined breaking point of the guarantee breaks and the intervention is displayed in this way. It is therefore in particular guarantee rings which are connected to the cap wall only by predetermined breaking webs and which therefore remain on the neck of the container when the container is opened, the security of which can be increased by the present invention.
  • an additional securing ring is provided, which is arranged to enclose at least part of the guarantee ring and coaxially with it.
  • the securing ring is connected to the guarantee ring at its upper end facing the cap wall.
  • the retaining ring covers at least part of the guarantee ring, so that it is no longer directly accessible from the outside. A particularly good protective effect is achieved if the free end of the guarantee ring lies within the securing ring. The free end is the lower end of the guarantee ring that is not connected to the cap wall.
  • a locking ring is particularly preferably used, which extends at least 0.5 mm below the free end of the guarantee ring. The free end of the guarantee ring, which is the main point of attack for stretching tests on the guarantee ring, is thus particularly effectively protected against external influences.
  • a mechanical guarantee band is preferably used, since there is at least one retaining element on its inside has a locking surface which, when the container is closed, engages under a projection at the container mouth.
  • Expansion tests on the guarantee ring which theoretically allow the retaining element to be displaced radially outwards, are to be made more difficult by the additional securing ring. But even if the retaining ring is stretched, this leads to a slight expansion of the guarantee ring, since the two rings are connected to one another.
  • the coupling of the guarantee ring and the circlip must therefore be kept as small as possible to ensure effective protection. In particular, that area of the guarantee ring which engages under the annular projection on the container neck should be decoupled from the securing ring as far as possible.
  • the circlip is therefore preferably connected to the top of the locking ring in an upper region of the locking surface.
  • the coupling can be further reduced if the guarantee ring has a section between the above-mentioned upper area and the blocking surface of the retaining element in which the guarantee band is thinner than in the upper area.
  • the outer diameter of the guarantee ring in its already mentioned upper region is larger than the inner diameter of the retaining ring.
  • the locking ring is arranged below this area.
  • This configuration has advantages if the securing ring is connected to the guarantee ring by predetermined breaking webs. This preferred embodiment is explained in more detail below.
  • the outer diameter in the upper area of the guaranteeing is equal to the outer diameter of the retaining ring. This permits the use of simple injection molds, there is an optically appealing design and deformations of the locking ring are more easily recognizable, since the outer surface of the upper guarantee band area serves as a reference surface when viewed.
  • connection between the guarantee ring and the circlip surrounding it also influences the strength of the mechanical coupling between these two elements.
  • a connection with a small cross-sectional area also causes less mechanical coupling.
  • the securing ring is therefore preferably connected to the guarantee ring by predetermined breaking webs. This has the additional advantage that stretching tests on the securing ring can lead to the breakage of these predetermined breaking webs, so that the manipulation becomes visible from the outside.
  • the locking ring has at least one predetermined breaking point on its circumference with a reduced locking ring. Cross section on. In the event of radial loading, the locking ring tears at this point.
  • predetermined breaking points can also be arranged distributed over the circumference of the securing ring. In the predetermined breaking point it can be, for. B. a vertical notch, preferably on the inside of the locking ring. This has the advantage that the outer surface of the retaining ring in the original state is also smooth in the area of the predetermined breaking points, so that a violation of these predetermined breaking points is immediately visible.
  • FIG. 1 shows a sectional view of a plastic closure cap with a guarantee ring, which is partially surrounded by a securing ring
  • FIG. 2 shows the bottom view of the closure cap shown in FIG. 1,
  • FIG. 3 shows the side view of an alternative screw cap with a guarantee ring and a securing ring
  • FIG. 4 shows the sectional view of the guarantee ring of the closure cap shown in FIG. 3.
  • FIG. 1 The closure cap shown in FIG. 1 consists of a cap base 1 and a cylindrical cap wall 2 adjoining it. This is connected at its lower edge by means of predetermined breaking webs 4 to a guarantee ring 3.
  • FIG. 1 is only partially shown in section, the part delimited by a break line at the bottom right shows the view of the screw cap from the outside.
  • the lower part of the guarantee ring 3 is surrounded by an additional securing ring 7 arranged coaxially to the latter.
  • the free end 9 of the guarantee ring lies within the locking ring 7. It is therefore difficult to reach from the outside without removing the locking ring 7.
  • the securing ring has a plurality of vertical notches 10, in the area of which a cross section is reduced. These are predetermined breaking points which break open when the locking ring is loaded radially.
  • the arrangement of the notches 10 on the inside of the locking ring 7 keeps its outer surface smooth. The breaking open of a predetermined breaking point or a notch 10 is therefore immediately recognizable from the outside.
  • the guarantee ring 3 has an upper area 11 in which its outer diameter is larger than the inner diameter of the locking ring 7. This enables the securing ring 7 and the guarantee ring 3 to be connected by means of predetermined breaking webs 8 which are approximately parallel to the cap axis and which are clearly visible from the outside. are cash. These predetermined breaking webs 8 are distributed over the circumference and connect the upper edge of the securing ring to the above-mentioned upper region 11 of the guarantee.
  • the guarantee ring 3 On its inner surface, the guarantee ring 3 has a circumferential retaining element 5 with a locking surface 6 which, after the closure has been installed, engages under an annular projection at the container mouth. Between the blocking surface 6 and the upper region 11, the guarantee ring has a section 12 with a reduced wall thickness. This contributes to reducing the mechanical coupling between the locking ring 7 and the part 5 of the guarantee ring which engages under the container mouth.
  • Figure 2 shows the view of the screw cap shown in Figure 1 from below.
  • the locking ring 7 surrounds the lower end 5 of the guarantee ring. Its vertical notches 10 are wedge-shaped, the front tip of this wedge being separated from the outer surface of the retaining ring only by a thin plastic skin.
  • the predetermined breaking webs 4 and 8 shown in FIG. 1 cannot be seen in this illustration.
  • the inner seal 14 starting from the cap base 1 is shown and individual sections 13 of the screw thread are recognizable within the guarantee ring.
  • FIG. 3 shows the side view of an alternative embodiment of the screw cap according to the invention.
  • the retaining ring consists of individual ring sector-shaped elements which are connected to one another by predetermined breaking webs 18.
  • These predetermined breaking webs 18 take over the function of the vertical notch 10 shown in FIG. 1. They break open when the securing ring is loaded radially, so that attempts at manipulation become visible from the outside.
  • a section of this screw cap is shown in section in FIG.
  • the connection between the securing ring and the inner guarantee ring 3a is visible, which consists of a further number of predetermined breaking webs 21 distributed over the circumference.
  • Each of these predetermined breaking webs 21 connects one of the upper predetermined breaking webs 18a of the securing ring with the guarantee ring 3a.
  • the guarantee ring 3a itself is connected to the cap wall 2 of the closure analogously to that stated in FIG. 1 by predetermined breaking webs 4.
  • a fixed connecting web 15 is provided which permanently connects the guarantee ring 3a at one point of the U to the cap wall 2.
  • the guarantee ring has a vertical predetermined breaking point 16 with a reduced guarantee ring cross section. In this example, this consists only of two thin webs 19 which tear when the container is opened for the first time, so that the guarantee ring is torn off the container mouth and remains connected to the cap wall 2 by the connecting element 15 even after the container has been opened.
  • the retention elements 20 engage under a bulge at the mouth of the container when the closure is attached; their function corresponds to the retention element 5 shown in FIG. 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Pens And Brushes (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)

Abstract

PCT No. PCT/CH95/00120 Sec. 371 Date May 8, 1996 Sec. 102(e) Date May 8, 1996 PCT Filed May 26, 1995 PCT Pub. No. WO96/00171 PCT Pub. Date Jan. 4, 1996Closure caps with anti-tamper strips (3) are used to visually display initial opening of a container to the public. The possibility of opening such a container without evidence should be prevented as far as possible. The possibility of stretching the anti-tamper strip (3), in order to then manipulate it past the bead on the container mouth, is here countered by an additional security ring (7). This security ring (7) is arranged coaxially to the actual anti-tamper ring (3). It is connected to the anti-tamper ring and mainly surrounds the lower area (5) of said anti-tamper ring. Access to the actual anti-tamper ring is considerably hindered as a result. In a preferred embodiment, the security ring possesses weakened zones (10) that break during manipulation, so that the interference will be visibly displayed to the outside.

Description

Verschlusskappe mit GarantieringCap with guarantee ring
Die Erfindung betrifft eine Verschlusskappe aus Kunststoff¬ material mit einem Garantiering, gemäss dem Oberbegriff von Anspruch 1. Solche Verschlusskappen werden bevorzugt als Schraubkappen ausgebildet und zum Verschliessen von Behälter¬ mündungen mit Aussengewinde verwendet. Bei aufgesetzter Verschlusskappe untergreift der Garantiering einen meist ringförmigen Vorsprung an der Behältermündung, was zum Ab- reissen des Garantierings führt, wenn der Behälter erstmals geöffnet wird. Solche Garantieverschlüsse werden beispiels¬ weise zum sicheren Verschliessen von Getränkeflaschen ver¬ wendet. Der Zustand des Garantierings läsεt den Konsumenten erkennen, ob der Behälter bereits geöffnet wurde.The invention relates to a closure cap made of plastic material with a guarantee ring, according to the preamble of claim 1. Such closure caps are preferably designed as screw caps and used for closing container mouths with an external thread. When the sealing cap is attached, the guarantee ring engages under a mostly ring-shaped projection at the container mouth, which leads to the guarantee ring being torn off when the container is opened for the first time. Such guarantee closures are used, for example, to securely close beverage bottles. The condition of the guarantee ring lets consumers know whether the container has already been opened.
Insbesondere in der Getränkeindustrie, aber auch beim Ver¬ packen von z. B. pharmazeutischen Produkten, wird grosser Wert auf die Sicherheit und Zuverlässigkeit solcher Garantie- verεchlüsse gelegt. Manipulationen am Garantieband, welche das unbemerkte Oeffnen des Verschlusses ermöglichen könnten, müssen daher durch geeignete Massnahmen erschwert und nach Möglichkeit ausgeschlossen werden.Especially in the beverage industry, but also when packing z. B. pharmaceutical products, great value is placed on the safety and reliability of such guarantee closures. Tampering with the guarantee band, which could enable the closure to go unnoticed, must therefore be made more difficult by suitable measures and, if possible, excluded.
Aus der US-4,147,268 ist eine Verschlusεkappe der genannten Art bekannt, welche einen zusätzlichen Schutzring aufweist. Dieser Schutzring ist an seinem oberen Ende fest mit der Kappenwand verbunden. Er erstreckt sich von dort aus bis zum oberen Ende des Garantierings nach unten und schützt dabei die den Garantiering mit der Kappenwand verbindenden Stege vor Manipulationen. Dagegen ist der Garantiering selbst und insbesondere dessen unterer, die Behältermündung untergrei¬ fender Teil, nach wie vor direkt von aussen zugänglich. Versuche welche darauf abzielen den Behälter durch Manipu¬ lationen am Garantiering unbemerkt zu öffnen, werden durch den Schutzring nicht behindert. Denkbar sind z. B. Dehnver¬ suche mit dem Ziel, den Garantiering beim Oeffnen des Behäl¬ ters unbeschadet über den Vorsprung der Behältermündung zu bringen.A closure cap of the type mentioned is known from US Pat. No. 4,147,268, which has an additional protective ring. This protective ring is firmly connected to the cap wall at its upper end. From there it extends down to the upper end of the guarantee ring and protects the webs connecting the guarantee ring to the cap wall against manipulation. On the other hand, the guarantee ring itself and in particular its lower part, which extends under the container mouth, is still directly accessible from the outside. Attempts which are aimed at opening the container unnoticed by manipulation of the guarantee ring are carried out by does not hinder the guard ring. Z are conceivable. B. Dehnver¬ with the aim of bringing the guarantee ring when opening the container undamaged over the projection of the container mouth.
Es ist daher eine Aufgabe der Erfindung die Nachteile des Bekannten zu vermeiden und eine Kunststoff-Verschlusskappe zu schaffen, deren Garantiering besser gegen unbemerkte Manipu¬ lationen geschützt ist. Diese Aufgabe wird erfindungsgemäss durch eine Verschlusskappe mit den Merkmalen von Anspruch 1 gelöst.It is therefore an object of the invention to avoid the disadvantages of the known and to create a plastic closure cap, the guarantee ring of which is better protected against undetected manipulations. This object is achieved according to the invention by a closure cap with the features of claim 1.
Die Verschlusskappe besteht aus einem Kappenboden und einer daran anschliessenden, in der Regel zylindrischen Kappenwand. Sie wird vorwiegend als Schraubkappe ausgebildet, wobei die Kappenwand innenseitig ein Schraubgewinde aufweist, welches beim Verschliessen des Behälters mit einem dazu korrespondie¬ renden Aussengewinde der Behältermündung in Eingriff gebracht wird. Es können jedoch auch andere VerschlusSysteme wie z.B. Bajonett- oder Schnappverschlüsse verwendet werden. Die Kappenwand ist an ihrem unteren, vom Kappenboden abgewandten Rand mit einem abreiεsbaren Garantiering verbunden. Dieser untergreift bei verschloεεenem Behälter einen meiεt ringför¬ migen Vorsprung an dem Behälterhals. Die abreiεεbare Ver¬ bindung zwischen Garantiering und Kappenwand besteht in der Regel aus einzelnen, über den Umfang verteilt angeordneten Sollbruchεtegen oder z.B auch auε einer Sollbruch-Verbindung, mit einem Wandabschnitt mit reduzierter, beispielεweiεe zu einem Film verdünnter Wandstärke, der beim erstmaligen Öffnen des Verschlusses reisεt. Der Garantiering kann ausεerdem durch einen oder mehrere breite Stege fest mit der Kappenwand verbunden εein und gleichzeitig an εeine Umfang eine Soll¬ bruchstelle mit reduziertem Garantiering-Querschnitt auf¬ weisen. Derartige Garantiestreifen sind in einer Vielzahl von Ausführungsformen bekannt, sie bleiben auch nach dem Oeffnen des Behälters durch die breiteren Verbindungsεtege mit der Kappenwand verbunden und werden daher bevorzugt zum Ver¬ schliessen von Mehrwegbehältern (z. B. Pfandflaschen) ver¬ wendet. Derartige Garantieringe bieten bereits einen gewissen Schutz vor unbefugten Manipulationen, besteht doch bei Dehn¬ versuchen die Gefahr, dass die Sollbruchstelle des Garan¬ tierings reisst und der Eingriff auf diese Weise angezeigt wird. Es sind daher insbesondere Garantieringe, die nur durch Sollbruchstege mit der Kappenwand verbunden sind und die daher beim Oeffnen des Behälters auf dem Behälterhals ver¬ bleiben, deren Sicherheit sich durch die vorliegende Erfin¬ dung erhöhen läsεt.The sealing cap consists of a cap base and an adjoining, usually cylindrical cap wall. It is predominantly designed as a screw cap, the inside of the cap wall having a screw thread which, when the container is closed, is brought into engagement with a corresponding external thread of the container mouth. However, other locking systems such as bayonet or snap locks can also be used. The cap wall is connected at its lower edge facing away from the cap base with a tear-off guarantee ring. When the container is closed, this engages under a mostly ring-shaped projection on the container neck. The tear-off connection between the guarantee ring and the cap wall generally consists of individual predetermined breaking webs distributed over the circumference or, for example, also of a predetermined breaking connection, with a wall section with a reduced wall thickness, for example a film that is thinned into a film, when the closure is opened for the first time travels. The guarantee ring can also be firmly connected to the cap wall by one or more wide webs and at the same time have a predetermined breaking point with a reduced guarantee ring cross-section on its circumference. Such guarantee strips are known in a large number of embodiments; they remain even after the container has been opened due to the wider connecting webs with the Cap wall connected and are therefore preferably used for closing reusable containers (eg deposit bottles). Such guarantee rings already offer a certain degree of protection against unauthorized manipulation, since there is a risk of stretching attempts that the predetermined breaking point of the guarantee breaks and the intervention is displayed in this way. It is therefore in particular guarantee rings which are connected to the cap wall only by predetermined breaking webs and which therefore remain on the neck of the container when the container is opened, the security of which can be increased by the present invention.
Um Manipulationen am Garantiering zu erschweren, ist ein zusätzlicher Sicherungsring vorgesehen, der wenigstens einen Teil des Garantierings umschliessend und koaxial zu diesem angeordnet ist. Der Sicherungsring ist dabei an seinem obe¬ ren, der Kappenwand zugewandten Ende mit dem Garantiering verbunden. Der Sicherungsring verdeckt wenigstens einen Teil des Garantierings, so dass dieser von aussen nicht mehr direkt zugänglich ist. Besonderε gute Schutzwirkung wird erzielt, wenn daε freie Ende des Garantieringε innerhalb des Sicherungsrings liegt. Das freie Ende ist das untere, nicht mit der Kappenwand verbundene Ende des Garantierings. Liegt dieses innerhalb des Sicherungsringε, εo bedeutet dies, daεs sich der Sicherungsring über den Garantiering hinaus nach unten erstreckt oder dass die Unterkanten des Garantierings und des Sicherungsrings zumindest auf gleicher Höhe liegen. Besonderε bevorzugt wird ein Sicherungsring verwendet, der sich wenigstens 0,5 mm über das freie Ende des Garantierings hinaus nach unter erstreckt. Damit ist daε freie Ende deε Garantierings, welches der Haupt-Angriffεpunkt für Dehnver¬ suche am Garantiering ist, besonderε wirksam gegen äusεere Einwirkungen geεchützt.In order to make tampering with the guarantee ring more difficult, an additional securing ring is provided, which is arranged to enclose at least part of the guarantee ring and coaxially with it. The securing ring is connected to the guarantee ring at its upper end facing the cap wall. The retaining ring covers at least part of the guarantee ring, so that it is no longer directly accessible from the outside. A particularly good protective effect is achieved if the free end of the guarantee ring lies within the securing ring. The free end is the lower end of the guarantee ring that is not connected to the cap wall. If this is within the circlip, this means that the circlip extends downward beyond the guarantee ring or that the lower edges of the guarantee ring and the circlip are at least at the same height. A locking ring is particularly preferably used, which extends at least 0.5 mm below the free end of the guarantee ring. The free end of the guarantee ring, which is the main point of attack for stretching tests on the guarantee ring, is thus particularly effectively protected against external influences.
Bevorzugt wird ein mechaniεcheε Garantieband verwendet, daε an seiner Innenseite wenigεtenε ein Rückhalteelement mit einer Sperrfläche aufweist, welche bei verschlossenem Behäl¬ ter einen Vorsprung an der Behältermündung untergreift. Dehnversuche am Garantiering, welche es theoretisch erlauben das Rückhalteelement radial nach ausεen zu verlagern, sollen durch den zusätzlichen Sicherungsring erschwert werden. Aber auch wenn der Sicherungεring gedehnt wird führt dies zu einer leichten Aufweitung des Garantierings, da die beiden Ringe ja miteinander verbunden sind. Die Kopplung von Garantiering und Sicherungsring muss daher möglichst klein gehalten werden, um einen wirksamen Schutz zu gewährleisten. Insbesondere sollte jener Bereich des Garantieringε, welcher den ringförmigen Vorsprung am Behälterhals untergreift, von dem Sicherungsring möglichst entkoppelt sein. Der Sicherungsring wird daher vorzugsweise in einem oberhalb der Sperrfläche liegenden oberen Bereich deε Garantierings mit diesem verbunden. Die Kopplung lässt sich weiter verringern, wenn der Garantiering zwischen dem genannten oberen Bereich und der Sperrfläche deε Rückhalteelements einen Abεchnitt aufweist, in dem daε Garan¬ tieband dünner alε im oberen Bereich iεt.A mechanical guarantee band is preferably used, since there is at least one retaining element on its inside has a locking surface which, when the container is closed, engages under a projection at the container mouth. Expansion tests on the guarantee ring, which theoretically allow the retaining element to be displaced radially outwards, are to be made more difficult by the additional securing ring. But even if the retaining ring is stretched, this leads to a slight expansion of the guarantee ring, since the two rings are connected to one another. The coupling of the guarantee ring and the circlip must therefore be kept as small as possible to ensure effective protection. In particular, that area of the guarantee ring which engages under the annular projection on the container neck should be decoupled from the securing ring as far as possible. The circlip is therefore preferably connected to the top of the locking ring in an upper region of the locking surface. The coupling can be further reduced if the guarantee ring has a section between the above-mentioned upper area and the blocking surface of the retaining element in which the guarantee band is thinner than in the upper area.
Weitere Vorteile ergeben εich, wenn der Aussendurchmesser des Garantierings in seinem bereits genannten oberen Bereich grösεer alε der Innendurchmeεεer des Sicherungsrings ist. Der Sicherungsring wird dabei unterhalb dieses Bereichs angeord¬ net. Diese Konfiguration hat Vorteile, wenn der Sicherungs¬ ring durch Sollbruchstege mit dem Garantiering verbunden wird. Diese bevorzugt Ausführungsform wird nachstehend noch näher erläutert. Bei einer beεonderε bevorzugten Auεführungε- for iεt der Ausεendurchmeεser im oberen Bereich des Garan¬ tieringε gleich dem Aussendurch deε Sicherungsrings. Dies erlaubt die Verwendung einfacher Spritzwerkzeuge, es ergibt sich ein optisch ansprechendes Design und Verformungen des Sicherungsringε εind leichter erkennbar, da die Auεεenflache deε oberen Garantieband-Bereichε bei der Betrachtung als Referenzfläche dient. Auch die Stärke der Verbindung zwischen dem Garantiering und dem diesen .umgebenden Sicherungsring beeinflusst die Stärke der mechanischen Kopplung zwischen diesen zwei Elementen. Eine Verbindung mit kleiner Querschnittsfläche verursacht auch eine geringere mechanische Kopplung. Der Sicherungsring wird daher bevorzugt durch Sollbruchstege mit dem Garantie¬ ring verbunden. Dies hat den zusätzlichen Vorteil, dass Dehnversuche am Sicherungsring zum Bruch dieser Sollbruch¬ stege führen können, so dasε die Manipulation von aussen sichtbar wird.Further advantages result if the outer diameter of the guarantee ring in its already mentioned upper region is larger than the inner diameter of the retaining ring. The locking ring is arranged below this area. This configuration has advantages if the securing ring is connected to the guarantee ring by predetermined breaking webs. This preferred embodiment is explained in more detail below. In a particularly preferred embodiment, the outer diameter in the upper area of the guaranteeing is equal to the outer diameter of the retaining ring. This permits the use of simple injection molds, there is an optically appealing design and deformations of the locking ring are more easily recognizable, since the outer surface of the upper guarantee band area serves as a reference surface when viewed. The strength of the connection between the guarantee ring and the circlip surrounding it also influences the strength of the mechanical coupling between these two elements. A connection with a small cross-sectional area also causes less mechanical coupling. The securing ring is therefore preferably connected to the guarantee ring by predetermined breaking webs. This has the additional advantage that stretching tests on the securing ring can lead to the breakage of these predetermined breaking webs, so that the manipulation becomes visible from the outside.
Tatsächlich ist jedoch, insbesondere bei Dehnversuchen, die radiale Belastung des Sicherungsrings weit grösser als desεen Belaεtung in axialer Richtung. Um εicher zu εtellen, dasε auch eine radiale Belaεtung deε Sicherungεringε zur Zerstö¬ rung desselben und damit zu einem von aussen sichtbaren Beweis für die Manipulation führt, weist der Sicherungsring nach einer weiteren bevorzugten Auεführungsform an seinem Umfang wenigstens eine Sollbruchstelle mit reduziertem Siche¬ rungsring-Querschnitt auf. Bei radialer Belaεtung reisst der Sicherungεring an dieεer Stelle. Eε können auch mehrere Sollbruchεtellen über den Umfang deε Sicherungεrings verteilt angeordnet werden. Bei der Sollbruchεtelle kann es sich z. B. um eine vertikale Einkerbung, vorzugsweise an der Innenseite des Sicherungsrings handeln. Dies hat den Vorteil, dasε die Aussenfläche deε Sicherungεringε im Original-Zustand auch im Bereich der Sollbruchstellen glatt ist, so daεε eine Ver¬ letzung dieser Sollbruchεtellen εofort εichtbar wird.In fact, however, especially in the case of stretching tests, the radial load on the locking ring is far greater than its load in the axial direction. In order to ensure that a radial loading of the locking ring leads to the destruction of the same and thus to evidence of the manipulation that is visible from the outside, according to a further preferred embodiment the locking ring has at least one predetermined breaking point on its circumference with a reduced locking ring. Cross section on. In the event of radial loading, the locking ring tears at this point. Several predetermined breaking points can also be arranged distributed over the circumference of the securing ring. In the predetermined breaking point it can be, for. B. a vertical notch, preferably on the inside of the locking ring. This has the advantage that the outer surface of the retaining ring in the original state is also smooth in the area of the predetermined breaking points, so that a violation of these predetermined breaking points is immediately visible.
Die Erfindung iεt im folgenden anhand von Ausführungsbei- spielen näher erläutert. Es zeigen:The invention is explained in more detail below on the basis of exemplary embodiments. Show it:
Figur 1 die Schnittdarstellung einer Kunstεtoff-Verschluss- kappe mit einem Garantiering, welcher teilweise von einem Sicherungsring umgeben ist, Figur 2 die Ansicht der in Figur 1 dargestellten Verεchluss- kappe von unten,FIG. 1 shows a sectional view of a plastic closure cap with a guarantee ring, which is partially surrounded by a securing ring, FIG. 2 shows the bottom view of the closure cap shown in FIG. 1,
Figur 3 die Seitenanεicht einer alternativen Schraubkappe mit Garantiering und Sicherungεring, undFIG. 3 shows the side view of an alternative screw cap with a guarantee ring and a securing ring, and
Figur 4 die Schnittdarεtellung des Garantierings der in Figur 3 gezeigten Verschlusskappe.FIG. 4 shows the sectional view of the guarantee ring of the closure cap shown in FIG. 3.
Die in Figur 1 dargestellte Verschlusεkappe beεteht aus einem Kappenboden 1 und einer daran anschlieεsenden, zylindriεchen Kappenwand 2. Dieεe iεt an ihrem unteren Rand durch Soll- bruchεtege 4 mit einem Garantiering 3 verbunden. Die Figur 1 iεt nur teilweise im Schnitt dargestellt, die durch eine Bruchlinie eingegrenzte Partie unten rechts zeigt die Ansicht der Schraubkappe von ausεen.The closure cap shown in FIG. 1 consists of a cap base 1 and a cylindrical cap wall 2 adjoining it. This is connected at its lower edge by means of predetermined breaking webs 4 to a guarantee ring 3. FIG. 1 is only partially shown in section, the part delimited by a break line at the bottom right shows the view of the screw cap from the outside.
Der untere Teil deε Garantieringε 3 iεt von einem zuεätzli- chen, koaxial zu diesem angeordneten Sicherungsring 7 umge¬ ben. Daε freie Ende 9 des Garantierings liegt innerhalb des Sicherungsrings 7. Es ist daher von aussen nur schwer er¬ reichbar, ohne den Sicherungsring 7 zu entfernen. An seiner Innenseite weiεt der Sicherungεring mehrere vertikale Ein¬ kerbungen 10 auf, in deren Bereich εein Querεchnitt reduziert ist. Es handelt sich dabei um Sollbruchstellen, welche bei radialer Belastung des Sicherungsringε aufbrechen. Durch die Anordnung der Einkerbungen 10 auf der Innenεeite deε Siche¬ rungεringε 7 bleibt εeine Auεεenflache glatt. Daε Aufbrechen einer Sollbruchεtelle bzw. einer Einkerbung 10 iεt daher von auεεen εofort erkennbar.The lower part of the guarantee ring 3 is surrounded by an additional securing ring 7 arranged coaxially to the latter. The free end 9 of the guarantee ring lies within the locking ring 7. It is therefore difficult to reach from the outside without removing the locking ring 7. On the inside, the securing ring has a plurality of vertical notches 10, in the area of which a cross section is reduced. These are predetermined breaking points which break open when the locking ring is loaded radially. The arrangement of the notches 10 on the inside of the locking ring 7 keeps its outer surface smooth. The breaking open of a predetermined breaking point or a notch 10 is therefore immediately recognizable from the outside.
Der Garantiering 3 hat einen oberen Bereich 11, in dem sein Ausεendurchmesser gröεεer als der Innendurchmesεer deε Siche¬ rungεringε 7 iεt. Dieε ermöglicht die Verbindung von Siche¬ rungεring 7 und Garantiering 3 durch etwa parallel zur Kap¬ penachse εtehende Sollbruchεtege 8, die von auεεen gut εicht- bar sind. Diese Sollbruchstege 8 sind über den Umfang ver¬ teilt angeordnet und verbinden den oberen Rand des Siche¬ rungsrings mit dem genannten oberen Bereich 11 des Garan¬ tierings.The guarantee ring 3 has an upper area 11 in which its outer diameter is larger than the inner diameter of the locking ring 7. This enables the securing ring 7 and the guarantee ring 3 to be connected by means of predetermined breaking webs 8 which are approximately parallel to the cap axis and which are clearly visible from the outside. are cash. These predetermined breaking webs 8 are distributed over the circumference and connect the upper edge of the securing ring to the above-mentioned upper region 11 of the guarantee.
An seiner Innenfläche hat der Garantiering 3 ein umlaufendes Rückhalteelement 5 mit einer Sperrfläche 6, welche nach der Montage des Verschlusses einen ringförmigen Vorsprung an der Behältermündung untergreift. Zwischen der Sperrfläche 6 und dem oberen Bereich 11 hat der Garantiering einen Abschnitt 12 mit reduzierter Wandstärke. Dieser trägt mit dazu bei, die mechanische Kopplung zwiεchen dem Sicherungsring 7 und dem die Behältermündung untergreifenden Teil 5 des Garantierings zu reduzieren.On its inner surface, the guarantee ring 3 has a circumferential retaining element 5 with a locking surface 6 which, after the closure has been installed, engages under an annular projection at the container mouth. Between the blocking surface 6 and the upper region 11, the guarantee ring has a section 12 with a reduced wall thickness. This contributes to reducing the mechanical coupling between the locking ring 7 and the part 5 of the guarantee ring which engages under the container mouth.
Figur 2 zeigt die Ansicht der in Figur 1 dargestellten Schraubkappe von unten. Der Sicherungsring 7 umgibt das untere Ende 5 des Garantierings. Seine vertikalen Einkerbun¬ gen 10 sind keilförmig ausgeprägt, wobei die vordere Spitze dieses Keils nur durch eine dünne Kunstεtoffhaut von der Auεεenflache des Sicherungεrings getrennt ist. Die in Figur 1 gezeigten Sollbruchstege 4 und 8 sind in dieser Darstellung nicht erkennbar. Dagegen ist die vom Kappenboden 1 ausgehende Innendichtung 14 eingezeichnet und innerhalb des Garantie- ringε εind einzelne Abεchnitte 13 deε Schraubgewindeε erkenn¬ bar.Figure 2 shows the view of the screw cap shown in Figure 1 from below. The locking ring 7 surrounds the lower end 5 of the guarantee ring. Its vertical notches 10 are wedge-shaped, the front tip of this wedge being separated from the outer surface of the retaining ring only by a thin plastic skin. The predetermined breaking webs 4 and 8 shown in FIG. 1 cannot be seen in this illustration. In contrast, the inner seal 14 starting from the cap base 1 is shown and individual sections 13 of the screw thread are recognizable within the guarantee ring.
In Figur 3 ist die Seitenansicht einer alternativen Auεfüh- rungsform der erfindungsge äεsen Schraubkappe dargestellt. Hier besteht der Sicherungsring aus einzelnen ringsektorför- migen Elementen, die durch Sollbruchstege 18 miteinander verbunden sind. Diese Sollbruchstege 18 übernehmen die Funk¬ tion der in Figur 1 gezeigten vertikalen Einkerbung 10. Sie brechen bei radialer Belastung des Sicherungεrings auf, so dass Manipulationsversuche von aussen sichtbar werden. Ein Auεεchnitt dieser Schraubkappe iεt in Figur 4 im Schnitt dargestellt. Hier ist die Verbindung zwischen dem Sicherungs¬ ring und dem inneren Garantiering 3a sichtbar, welche aus einer weiteren Anzahl von über den Umfang verteilt angeord¬ neten Sollbruchstegen 21 besteht. Jeder dieser Sollbruchstege 21 verbindet einen der oberen Sollbruchstege 18a des Siche¬ rungsrings mit dem Garantiering 3a.FIG. 3 shows the side view of an alternative embodiment of the screw cap according to the invention. Here the retaining ring consists of individual ring sector-shaped elements which are connected to one another by predetermined breaking webs 18. These predetermined breaking webs 18 take over the function of the vertical notch 10 shown in FIG. 1. They break open when the securing ring is loaded radially, so that attempts at manipulation become visible from the outside. A section of this screw cap is shown in section in FIG. Here the connection between the securing ring and the inner guarantee ring 3a is visible, which consists of a further number of predetermined breaking webs 21 distributed over the circumference. Each of these predetermined breaking webs 21 connects one of the upper predetermined breaking webs 18a of the securing ring with the guarantee ring 3a.
Der Garantiering 3a selbst ist analog dem zu Figur 1 gesagten durch Sollbruchstege 4 mit der Kappenwand 2 des Verschlusses verbunden. Zusätzlich ist ein fester Verbindungssteg 15 vorgesehen, welcher den Garantiering 3a an einer Stelle deε U fangs dauerhaft mit der Kappenwand 2 verbindet. Direkt neben dem Verbindungselement 15 weist der Garantiering eine vertikale Sollbruchstelle 16 mit reduziertem Garantiering- Querschnitt auf. Dieser besteht in diesem Beispiel lediglich aus zwei dünnen Stegen 19, welche beim erstmaligen Oeffnen des Behälters reissen, so dass der Garantiering von der Behältermündung abgerissen wird und auch nach dem Oeffnen des Behälters durch daε Verbindungselement 15 mit der Kappenwand 2 verbunden bleibt.The guarantee ring 3a itself is connected to the cap wall 2 of the closure analogously to that stated in FIG. 1 by predetermined breaking webs 4. In addition, a fixed connecting web 15 is provided which permanently connects the guarantee ring 3a at one point of the U to the cap wall 2. Directly next to the connecting element 15, the guarantee ring has a vertical predetermined breaking point 16 with a reduced guarantee ring cross section. In this example, this consists only of two thin webs 19 which tear when the container is opened for the first time, so that the guarantee ring is torn off the container mouth and remains connected to the cap wall 2 by the connecting element 15 even after the container has been opened.
Die Rückhalteelemente 20 untergreifen bei aufgesetztem Ver- schlusε einen Wulst an der Behältermündung, sie entsprechen in ihrer Funktion dem in Figur 1 gezeigten Rückhalteelement 5. The retention elements 20 engage under a bulge at the mouth of the container when the closure is attached; their function corresponds to the retention element 5 shown in FIG. 1.

Claims

Patentansprüche Claims
1. Verschlusskappe aus Kunststoffmaterial zum Verschliessen einer Behälteröffnung, mit einem Kappenboden (1) und einer daran anschliessenden, zylindrischen Kappenwand (2), die an ihrem unteren Rand mit einem abreissbaren Garantiering (3) verbunden ist, welcher bei verschlosse¬ nem Behälter einen Vorsprung an der Behältermündung untergreift, gekennzeichnet durch einen Sicherungsring (7), der wenigstenε einen Teil deε Garantieringε (3) umschliesst und koaxial zu dieεem an¬ geordnet ist, und der an seinem der Kappenwand (2) zu¬ gewandten Ende mit dem Garantiering (3) verbunden ist.1.Capping cap made of plastic material for closing a container opening, with a cap base (1) and a cylindrical cap wall (2) adjoining it, which is connected at its lower edge to a tear-off guarantee ring (3) which has a projection when the container is closed engages under the container mouth, characterized by a locking ring (7) which at least encloses a part of the guarantee ring (3) and is arranged coaxially to this, and which has the guarantee ring (3) on its end facing the cap wall (2) ) connected is.
2. Verschlusskappe nach Anspruch 1, dadurch gekennzeichnet, dass das freie Ende (9) des Garantieringε (3) innerhalb deε Sicherungεringε (7) liegt.2. Cap according to claim 1, characterized in that the free end (9) of the Garantieringε (3) is within deε Sicherheitεringε (7).
3. Verεchlusskappe nach einem der Anεprüche 1 oder 2, da¬ durch gekennzeichnet, dass der Garantiering (3) an sei¬ ner Innenseite wenigstens ein Rückhalteelement (5) mit einer Sperrfläche (6) aufweist, welche bei verschlosse¬ nem Behälter den Vorsprung an der Behältermündung unter¬ greift, und dass der Sicherungsring in einem oberhalb der Sperrfläche liegenden Bereich deε Garantiebandε mit dieεem verbunden ist.3. Closure cap according to one of claims 1 or 2, characterized in that the guarantee ring (3) has at least one retaining element (5) on its inside with a locking surface (6) which, when the container is closed, engages the projection engages the container mouth, and that the securing ring is connected to this in a region of the guarantee band lying above the blocking surface.
4. Verschluεεkappe nach Anεpruch 3, dadurch gekennzeichnet, dass der Garantiering zwischen dem oberen Bereich (11) und der Sperrfläche (6) des Rückhalteelementε (5) einen Abεchnitt aufweiεt, in dem daε Garantieband dünner als im oberen Bereich ist.4. Cap according to claim 3, characterized in that the guarantee ring between the upper region (11) and the blocking surface (6) of the retaining element (5) has a section in which the guarantee band is thinner than in the upper region.
5. Verschlusskappe nach einem der Ansprüche 1 bis 4, da¬ durch gekennzeichnet, dass der Aussendurchmesser des Garantierings (3) in seinem oberen Bereich (11) grösεer alε der Innendurchmeεser deε Sicherungsrings ist und daεε der Sicherungεring (7) unterhalb dieses Bereichs (11) angeordnet ist.5. Cap according to one of claims 1 to 4, characterized in that the outer diameter of the guarantee ring (3) is larger in its upper region (11) is the inside diameter of the locking ring and the locking ring (7) is arranged below this area (11).
6. Verschlusεkappe nach einem der Anεprüche 1 bis 5, da¬ durch gekennzeichnet, dass der Sicherungsring (7) an seinem Umfang wenigstens eine Sollbruchstelle (10) mit reduziertem Sicherungsring-Querschnitt aufweist.6. Closure cap according to one of claims 1 to 5, characterized in that the securing ring (7) has at least one predetermined breaking point (10) on its circumference with a reduced securing ring cross-section.
7. Verschlusskappe nach Anspruch 6, dadurch gekennzeichnet, dass der Sicherungsring (7) im Bereich der Sollbruch- εtelle an εeiner Innenεeite eine vertikale Einkerbung (10) aufweiεt.7. Cap according to claim 6, characterized in that the securing ring (7) has a vertical notch (10) in the area of the predetermined breaking point on its inside.
8. Verεchlusskappe nach einem der Ansprüche 1 bis 7, da¬ durch gekennzeichnet, dass der Sicherungεring (7) durch Sollbruchεtege (8) und/oder durch eine Sollbruchεtelle mit einem Wandabεchnitt mit reduzierter Wandεtärke mit dem Garantiering (3) verbunden iεt.8. A closure cap according to one of claims 1 to 7, characterized in that the securing ring (7) is connected to the guarantee ring (3) by predetermined breaking webs (8) and / or by a predetermined breaking point with a wall section with reduced wall thickness.
9. Verεchluεεkappe nach einem der Anεprüche 1 biε 8, da¬ durch gekennzeichnet, daεε der Garantiering nur durch Sollbruchεtege mit der Kappenwand verbunden iεt, εo daεε er beim erεtmaligen Öffnen des Behälters auf dem Behäl- terhalε verbleibt. 9. Closure cap according to one of claims 1 to 8, characterized by the fact that the guarantee ring is connected to the cap wall only by predetermined breaking bars, so that it remains on the container holder when the container is opened for the first time.
EP95918496A 1994-06-27 1995-05-26 Closure cap with warranty ring Expired - Lifetime EP0714368B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH2035/94 1994-06-27
CH203594 1994-06-27
PCT/CH1995/000120 WO1996000171A1 (en) 1994-06-27 1995-05-26 Closure cap with warranty ring

Publications (2)

Publication Number Publication Date
EP0714368A1 true EP0714368A1 (en) 1996-06-05
EP0714368B1 EP0714368B1 (en) 1998-07-29

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JP (1) JPH09502411A (en)
KR (1) KR960703776A (en)
CN (1) CN1129925A (en)
AT (1) ATE168955T1 (en)
AU (1) AU685276B2 (en)
BR (1) BR9506045A (en)
CA (1) CA2167602A1 (en)
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US5715959A (en) 1998-02-10
CN1129925A (en) 1996-08-28
NZ285363A (en) 1997-02-24
HU9600457D0 (en) 1996-04-29
CA2167602A1 (en) 1995-12-28
AU685276B2 (en) 1998-01-15
HUT74665A (en) 1997-01-28
JPH09502411A (en) 1997-03-11
BR9506045A (en) 1997-08-05
KR960703776A (en) 1996-08-31
ATE168955T1 (en) 1998-08-15
DE59502975D1 (en) 1998-09-03
AU2443195A (en) 1996-01-19
EP0714368B1 (en) 1998-07-29
MX9600746A (en) 1997-04-30
WO1996000171A1 (en) 1996-01-04
PL313225A1 (en) 1996-06-10

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