EP0299017A1 - Tamper-proof ring for containers. - Google Patents

Tamper-proof ring for containers.

Info

Publication number
EP0299017A1
EP0299017A1 EP88900807A EP88900807A EP0299017A1 EP 0299017 A1 EP0299017 A1 EP 0299017A1 EP 88900807 A EP88900807 A EP 88900807A EP 88900807 A EP88900807 A EP 88900807A EP 0299017 A1 EP0299017 A1 EP 0299017A1
Authority
EP
European Patent Office
Prior art keywords
closure
guarantee ring
barb
wedge
closure according
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
EP88900807A
Other languages
German (de)
French (fr)
Other versions
EP0299017B2 (en
EP0299017B1 (en
Inventor
Walter Wiedmer
Ernst Wiedmer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Walter Wiedmar AG Plastikform
Original Assignee
Walter Wiedmar AG Plastikform
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
Family has litigation
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Application filed by Walter Wiedmar AG Plastikform filed Critical Walter Wiedmar AG Plastikform
Priority to AT88900807T priority Critical patent/ATE67979T1/en
Publication of EP0299017A1 publication Critical patent/EP0299017A1/en
Application granted granted Critical
Publication of EP0299017B1 publication Critical patent/EP0299017B1/en
Publication of EP0299017B2 publication Critical patent/EP0299017B2/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
    • 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
    • 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
    • B65D2401/00—Tamper-indicating means
    • B65D2401/15—Tearable part of the closure
    • B65D2401/30—Tamper-ring remaining connected to closure after initial removal
    • 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
    • B65D2401/00—Tamper-indicating means
    • B65D2401/15—Tearable part of the closure
    • B65D2401/35—Vertical or axial lines of weakness

Definitions

  • the invention relates to a closure for containers, with a guarantee ring on its underside, which carries barbs projecting inwards on its inner wall, extending upwards, wedging on the container when the closure is lifted and thereby causing the guarantee ring to be separated from the closure body.
  • barbs are located below the container mouth when the closure is attached, which usually has a larger diameter than the adjacent container neck. Its free end, ie its tip, is at a distance from the longitudinal central axis of the container and thus also of the closure, which is smaller than the radius of the container mouth mentioned. When the closure is lifted off, these barbs lie against the underside of the container mouth, as a result of which the guarantee ring, which is connected to the actual closure body via thin webs, is separated from the latter. The first opening of the closure is therefore indicated.
  • Barbs of this type are already known from numerous publications, e.g. from US Pat. No. 4,488,655.
  • the barbs are designed as individual projections distributed over the circumference of the guarantee ring; but it is also a ring-shaped one
  • Barb has been proposed, which extends over the entire circumference. Both the top of the barbs and the bottom have a certain inclination to the inner wall of the guarantee ring, from which they protrude. The angle is relative large, usually between 50 - 60. However, the top can also have an even larger angle, up to 90-.
  • the present invention seeks to avoid these difficulties which are extremely disruptive to the bottling plant.
  • the closure according to the invention is characterized by the features of claim 1.
  • the new design of the barbs according to the invention thus achieves both an improvement in the properties of the closure with regard to the mechanical placement thereof and an increase in the barb effect when unscrewing. It should also be noted that the new shape of the closure does not involve any complications and thus increases the cost of the production process by means of injection molding; a combination of properties that was not immediately apparent to the person skilled in the art.
  • Fig. 2 is a view of the guarantee ring over part of its circumference
  • Fig. 3 is a schematic areal exterior view of a preferred form of the closure. 1 with the closure body, 2 with the guarantee ring connected to it via webs 3. On its inner wall 4, several, mostly three barbs evenly distributed over it extend over part of the circumference, of which only one barb 5 is shown in the figures. This has a bottom 6 inclined upwards from the inner wall 4 and a horizontal top 7. As can be seen from the hatching in FIG. 1, the closure body 1, the guarantee ring 2, the webs 3 and the barb 5 form a piece which is produced in one injection step.
  • an inlet or sliding wedge 8 is arranged in the middle of the barb 5. This extends obliquely upwards from the lower edge 9 of the guarantee ring 2 and runs tangentially into the rounding or tip 10 of the barb 5.
  • the angle 0, at which its sliding surface 11 is inclined to the vertical inner wall 4 of the guarantee ring 2, is preferably 31 °; this value resulted from tests and represents an optimum. This optimum even determines the distance a of the tip 10 of the barb 5 from the inner wall 4; How far this barb may protrude from the inner wall 4 depends on the one hand on the angle mentioned and then also on the height of the barb 5 above the lower edge 9 of the guarantee ring 2.
  • the tip 10 must protrude so far inwards, that hook 5 still fulfills its function. It must therefore be located within the profile of the container mouth or, in other words, closer to the longitudinal central axis A shown in FIG. 1 than the wall of the container mouth, because it must lie on its underside when the closure is lifted off.
  • Guarantee ring 2 begins and no further out of the inner wall 4. Then, below these sliding wedges, the guarantee 2 would again have a purely cylindrical shape over its entire circumference, which would again lead to the disturbances already mentioned.
  • the sliding wedges must therefore extend to the edge 9 so that they take effect immediately when the closure is put on.
  • FIG. 3 shows an areal representation of a preferred embodiment of the plastic closure according to the invention with a guarantee ring.
  • 21 denotes a cross-connection for the guarantee ring 2, which is interrupted at this point, which ring is also attached to the interruption mentioned by means of the stronger web 22 on the closure 1.
  • the interruption mentioned thus clearly acts as a "crack" or predetermined breaking point.
  • this embodiment of the guarantee ring 2 which is already known per se this not only separates it from the closure body 1, but also slits it up itself, so that it then hangs down in an inclined position and clearly indicates the first opening.

Landscapes

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

Abstract

PCT No. PCT/CH88/00017 Sec. 371 Date Sep. 13, 1988 Sec. 102(e) Date Sep. 13, 1988 PCT Filed Jan. 27, 1988 PCT Pub. No. WO88/05754 PCT Pub. Date Aug. 11, 1988.The closure has a body (1) and a guarantee ring (2) connected to it. The hooks (5) applied to the guarantee ring (2) and intended to separate the latter (2) from the body (1) of the closure upon removal of the closure from the container are each equipped with a slide wedge (8). This wedge may perferably be in the middle of the hook which extends longitudinally along the periphery of the closure. The wedge (8) has a slide face (11) of a width (b) that is about a quarter of the length (L) of the hook (5). The slide face (11) is inclined to the interior wall (4) of the guarantee ring preferably at an angle ( alpha ) of 31 degrees and initiates at the lower rim (9) of the guarantee ring in order to improve the machine-operated placing of the closure onto the container.

Description

Verschluss mit Garantiering für Behälter Closure with a guarantee ring for containers
Die Erfindung betrifft einen Verschluss für Behälter, mit einem Garantiering an seiner Unterseite, der an seiner Innenwand nach innen ragende, nach oben sich erstreckende, bei Abheben des Ver¬ schlusses sich am Behälter verkeilende und dadurch ein Abtrennen des Garantieringes vom Verschlusskörper bewirkende Widerhaken trägt.The invention relates to a closure for containers, with a guarantee ring on its underside, which carries barbs projecting inwards on its inner wall, extending upwards, wedging on the container when the closure is lifted and thereby causing the guarantee ring to be separated from the closure body.
Diese Widerhaken befinden sich bei aufgesetztem Verschluss unterhalb der Behältermündung, die in der Regel einen grösseren Durchmesser als der angrenzende Behälterhals aufweist. Ihr freies Ende, also ihre Spitze, weist einen Abstand von der Längsmittel¬ achse des Behälters und damit auch des Verschlusses auf, der kleiner als der Radius der erwähnten Behältermündung ist. Beim Abheben des Verschlusses legen sich somit diese Widerhaken gegen die Unterseite der Behältermündung an, wodurch der Garantiering, der über dünne Stege mit dem eigentlichen Verschlusskörper ver¬ bunden ist, vom letzteren abgetrennt wird. Das erstmalige Oeffnen des Verschlusses ist somit angezeigt.These barbs are located below the container mouth when the closure is attached, which usually has a larger diameter than the adjacent container neck. Its free end, ie its tip, is at a distance from the longitudinal central axis of the container and thus also of the closure, which is smaller than the radius of the container mouth mentioned. When the closure is lifted off, these barbs lie against the underside of the container mouth, as a result of which the guarantee ring, which is connected to the actual closure body via thin webs, is separated from the latter. The first opening of the closure is therefore indicated.
Widerhaken dieser Art sind aus zahlreichen Druckschriften bereits bekannt, z.B. aus der US-Patentschrift 4 488 655. Die Widerhaken sind als einzelne, über den Umfang des Garantieringes verteilte Vorsprünge ausgebildet; es ist aber auch schon ein ringförmigerBarbs of this type are already known from numerous publications, e.g. from US Pat. No. 4,488,655. The barbs are designed as individual projections distributed over the circumference of the guarantee ring; but it is also a ring-shaped one
Widerhaken vorgeschlagen worden, der sich also über den ganzen Um¬ fang erstreckt. Sowohl die Oberseite der Widerhaken als auch die Unterseite weisen eine bestimmte Neigung zur Innenwand des Garan¬ tieringes auf, aus der sie hervorragen. Der Winkel ist relativ gross, in der Regel zwischen 50 - 60 . Die Oberseite kann jedoch auch einen noch grösseren Winkel aufweisen, bis zu 90- .Barb has been proposed, which extends over the entire circumference. Both the top of the barbs and the bottom have a certain inclination to the inner wall of the guarantee ring, from which they protrude. The angle is relative large, usually between 50 - 60. However, the top can also have an even larger angle, up to 90-.
Neben Widerhaken dieser Formgebung sind auch solche vorgeschlagen worden, die nicht schräg nach oben von der Innenwand abstehen, sondern horizontal, die also gewissermassen einen kleineren Krümmungsradius als derjenige der Innenwand aufweisen. Ihr Wider¬ stand gegen das Abheben des Verschlusses ist jedoch geringer als bei den schräg nach oben verlaufenden Widerhaken, weshalb sie sich nicht durchgesetzt haben. Vor allem aber ergeben sich bei ihnen Probleme beim Aufsetzen der Verschlüsse auf die Behälter. Die Widerhaken müssen nämlich über die einen grösseren Durchmesser aufweisende Behältermündung hinweggleiten, wobei sie sich eng an die Innenwand des Garantieringes anlegen. Erst nachher, bei Errei- chen des dünneren Behälterhalses, können sie wieder ihre von der Innnenwand abstehende Lage einnehmen. Es leuchtet ein, dass schräg nach oben gerichtete Keile hierbei besser sind als die vorhin er¬ wähnten anderen Ausführungsformen.In addition to barbs of this shape, those have also been proposed which do not protrude obliquely upward from the inner wall, but horizontally, that is to say to a certain extent have a smaller radius of curvature than that of the inner wall. Their resistance to the closure being lifted is, however, less than that of the barbs which extend obliquely upwards, which is why they have not become established. Above all, however, they encounter problems when placing the closures on the containers. This is because the barbs have to slide over the container mouth with a larger diameter, whereby they lie closely against the inner wall of the guarantee ring. Only afterwards, when the thinner neck of the container has been reached, can they again assume their position protruding from the inner wall. It is obvious that wedges directed obliquely upwards are better than the other embodiments mentioned above.
Aber selbst bei den genannten schrägen Widerhaken ergeben sich in der Praxis Schwierigkeiten beim Aufsetzen. Die Abfüllmaschinen, namentlich in der Getränkeindustrie, sind für derart extrem hohe Stundenleistungen konzipiert, dass für das Aufsetzen des einzelnen Verschlusses nur noch eine äusserst kurze Zeit übrig bleibt. In dieser Zeitspanne uss der Verschluss über die Behä'ltermündung gleiten, und wegen seines etwas kleineren Durchmessers muss sich der Garantiering, der beim Aufsetzen als erster auf die Behälter¬ mündung auftrifft, elastisch aufweiten. Die dünnen Stege, die den Garantiering mit dem Verschlusskörper verbinden, müssen also den ersteren gewissermassen vor sich herschieben, ohne dass sie dabei beschädigt werden.But even with the oblique barbs mentioned, difficulties arise when putting them on in practice. The filling machines, especially in the beverage industry, are designed for such extremely high hourly outputs that only a very short time is left to put on the individual closure. In this period, uss the closure on the CONT 'slide ltermündung, and because of its slightly smaller diameter, the anti-tamper ring that is incident on the first Behälter¬ muzzle when placed must elastically expand. The thin webs that connect the guarantee ring to the locking body must therefore, as it were, push the former in front of them without being damaged.
Es hat sich nun gezeigt, dass die bisherigen Widerhaken das Auf¬ setzen blockieren. Sie waren offensichtlich zu stark zur Richtung der Aufsetzbewegung geneigt, und wirkten daher wie vorstehende, starre Hindernisse. Ein elastisches Aufweiten war in der erwähnten kurzen Zeit nicht oder bestenfalls nur schlecht möglich. Die Garantieringe stauten sich daher an den Behältermündungen, was zum Stauchen der Verbindungsstege führte. Damit liessen sich die Ver¬ schlusskörper nicht mehr aufsetzen, denn an ihrem Platz waren noch die Garantieringe, die nicht über die Behältermündung geglitten waren. Es kam zu Störungen im Abfüllbetrieb. Auch andere Störungs¬ ursachen liessen sich nachweisen, wie ein Aufsprengen der Garan¬ tieringe.It has now been shown that the previous barbs block the attachment. They were obviously inclined too much to the direction of the touchdown movement and therefore acted as above, rigid obstacles. In the short time mentioned, elastic expansion was not possible, or at best only poorly. The guarantee rings therefore jammed at the container mouths, which led to the compression of the connecting webs. This meant that the closure bodies could no longer be put on because the guarantee rings were still in place and had not slid over the mouth of the container. There were faults in the bottling plant. Other causes disturbance ¬ could be detected, like a bursting of Garan¬ animal total.
Diese den Abfüllbetrieb äusserst störenden Schwierigkeiten will die vorliegende Erfindung vermeiden. Der erfindungsgemässe Ver¬ schluss ist durch die Merkmale des Anspruches 1 gekennzeichnet.The present invention seeks to avoid these difficulties which are extremely disruptive to the bottling plant. The closure according to the invention is characterized by the features of claim 1.
Durch die neue Ausbildungsform der erfindungsge ässen Widerhaken werden also sowohl eine Verbesserung der Eigenschaften des Ver¬ schlusses hinsichtlich des maschinellen Aufsetzens desselben wie auch eine Verstärkung der Widerhaken-Wirkung beim Abschrauben er¬ reicht. Auch ist anzumerken, dass die neue Form des Verschlusses keinerlei Komplizierung und somit Verteuerung des Herstellungs¬ verfahrens mittels Spritzguss nach sich zieht; eine Kombination von Eigenschaften also, die auch dem Fachmann nicht ohne weiteres ersichtlich war.The new design of the barbs according to the invention thus achieves both an improvement in the properties of the closure with regard to the mechanical placement thereof and an increase in the barb effect when unscrewing. It should also be noted that the new shape of the closure does not involve any complications and thus increases the cost of the production process by means of injection molding; a combination of properties that was not immediately apparent to the person skilled in the art.
Die Erfindung wird anhand der beiliegenden Zeichnungen beispiels¬ weise näher erläutert; es zeigenThe invention is explained in more detail, for example, with reference to the accompanying drawings; show it
Fig. 1 einen Querschnitt durch den Garantiering und den Unterteil des Verschlusses längs der Linie I - I in Fig. 2,1 shows a cross section through the guarantee ring and the lower part of the closure along the line I - I in FIG. 2,
Fig. 2 eine Ansicht des Garantieringes-über einen Teil seines Umfanges, undFig. 2 is a view of the guarantee ring over part of its circumference, and
Fig. 3 eine schematische flächenhafte Aussenansicht einer bevorzugten Form des Verschlusses. Mit 1 ist der Verschlusskörper, mit 2 der mit ihm über Stege 3 verbundene Garantiering bezeichnet. An dessen Innenwand 4 er¬ strecken sich über einen Teil des Umfanges mehrere, meist drei gleichmässig an demselben verteilte Widerhaken, von denen in den Figuren nur ein Widerhaken 5 dargestellt ist. Dieser weist eine von der Innenwand 4 aus nach oben geneigte Unterseite 6 und eine horizontale Oberseite 7 auf. Wie aus der Schraffur in Figur 1 ersichtlich, bilden Verschlusskörper 1, Garantiering 2, Stege 3 und Widerhaken 5 ein Stück, das in einem Spritzgang hergestellt wird.Fig. 3 is a schematic areal exterior view of a preferred form of the closure. 1 with the closure body, 2 with the guarantee ring connected to it via webs 3. On its inner wall 4, several, mostly three barbs evenly distributed over it extend over part of the circumference, of which only one barb 5 is shown in the figures. This has a bottom 6 inclined upwards from the inner wall 4 and a horizontal top 7. As can be seen from the hatching in FIG. 1, the closure body 1, the guarantee ring 2, the webs 3 and the barb 5 form a piece which is produced in one injection step.
Wie nun namentlich aus Figur 2 ersichtlich, ist in der Mitte des Widerhakens 5 ein Einlauf- oder Gleitkeil 8 angeordnet. Dieser erstreckt sich vom unteren Rand 9 des Garantieringes 2 aus schräg nach oben und läuft tangential in die Abrundung oder Spitze 10 des Widerhakens 5 ein. Der Winkel 0 , unter welchem seine Gleitfläche 11 zur senkrechten Innenwand 4 des Garantieringes 2 geneigt ist, beträgt vorzugsweise 31°; dieser Wert ergab sich aus Versuchen und stellt ein Optimum dar. Dieses Optimum bestimmt sogar den Abstand a der Spitze 10 des Widerhakens 5 von der Innenwand 4; wie weit dieser Widerhaken von der Innenwand 4 abstehen darf, richtet sich also einerseits nach dem erwähnten Winkel und dann auch nach der Höhe des Widerhakens 5 über dem unteren Rand 9 des Garantieringes 2. Allerdings muss natürlich die Spitze 10 soweit nach innen ra- gen, dass der- iderhaken 5 seine Funktion noch erfüllt. Sie muss sich also innerhalb des Profils der Behältermündung befinden oder anders gesagt, näher bei der in Figur 1 dargestellten Längsmittel¬ achse A als die Wand der Behältermündung, denn sie muss ja beim Abheben des Verschlusses sich an deren Unterseite anlegen.As can now be seen in particular from FIG. 2, an inlet or sliding wedge 8 is arranged in the middle of the barb 5. This extends obliquely upwards from the lower edge 9 of the guarantee ring 2 and runs tangentially into the rounding or tip 10 of the barb 5. The angle 0, at which its sliding surface 11 is inclined to the vertical inner wall 4 of the guarantee ring 2, is preferably 31 °; this value resulted from tests and represents an optimum. This optimum even determines the distance a of the tip 10 of the barb 5 from the inner wall 4; How far this barb may protrude from the inner wall 4 depends on the one hand on the angle mentioned and then also on the height of the barb 5 above the lower edge 9 of the guarantee ring 2. However, of course the tip 10 must protrude so far inwards, that hook 5 still fulfills its function. It must therefore be located within the profile of the container mouth or, in other words, closer to the longitudinal central axis A shown in FIG. 1 than the wall of the container mouth, because it must lie on its underside when the closure is lifted off.
Zweckmässigerweise ist nur ein Gleitke l 8 pro Widerhaken 5 vor¬ handen, welcher demzufolge symmetrisch, d.h. in der Mitte des letzteren angeordnet ist, wie aus Figur 2 ersichtlich. Ein Gleit¬ keil genügt meistens, und zweitens muss stets darauf geachtet werden, dass möglichst wenig Material zur Herstellung des Ver¬ schlusses gebraucht wird, was bei den enormen Stückzahlen von ausschlaggebender Bedeutung ist, auch wenn es sich beim einzelnen Stück nur um sehr geringe Mengen handelt. Drittens darf der Gleit- keil 8 nicht zu einer wesentlichen Versteifung des Garantieringes 2 führen, da sonst erneut die Gefahr der bereits erwähnten Störun¬ gen auftritt; der Garantiering muss auch trotz der Gleitkeile in der Lage sein, sich beim Aufsetzen elastisch aufweiten zu können. Aus diesem Grund hat es wenig Sinn, anstelle des Gleitkeils 8 die Unterseite 6 um den erwähnten Winkel zu neigen, also den Wider¬ haken 5 über seine ganze Breite selber als Gleitkeil auszubilden. Dies würde wie erwähnt zuviel Material beanspruchen und die Elastizität herabsetzen. Zweckmässig hat es sich erwiesen, die Breite b des Gleitkeils 8 auf einen Viertel der Länge L des Widerhakens 5 anzusetzen. Eine Ausnahme hievon kann dann zugelas¬ sen werden, wenn zahlreiche, aber sehr schmale Widerhaken 5 vorge¬ sehen werden. Dann kann die Breite b des Gleitkeils 8 ausnahms¬ weise der dann geringen Länge L des Widerhakens entsprechen.Conveniently, there is only one slide 8 per barb 5, which is consequently arranged symmetrically, ie in the middle of the latter, as can be seen in FIG. A sliding wedge is usually sufficient, and secondly, attention must always be paid to it are that as little material as possible is used to produce the closure, which is of crucial importance in the case of the enormous number of pieces, even if the individual piece is only a very small quantity. Thirdly, the sliding wedge 8 must not lead to a substantial stiffening of the guarantee ring 2, since otherwise the risk of the disturbances already mentioned occurs again; despite the sliding wedges, the guarantee ring must also be able to expand elastically when it is put on. For this reason, it makes little sense to incline the underside 6 by the angle mentioned instead of the sliding wedge 8, that is to say to design the barb 5 itself as a sliding wedge over its entire width. As mentioned, this would take up too much material and reduce the elasticity. It has proven expedient to set the width b of the sliding wedge 8 to a quarter of the length L of the barb 5. An exception to this can be admitted if numerous but very narrow barbs 5 are provided. Then the width b of the sliding wedge 8 can correspond exceptionally to the then small length L of the barb.
Wichtig ist auch, dass der Gleitkeil genau am unteren Rand 9 desIt is also important that the slide wedge is exactly at the bottom 9 of the
Garantieringes 2 beginnt und nicht weiter oben aus der Innenwand 4 heraus. Dann hätte nämlich unterhalb dieser Gleitkeile der Garan¬ tiering 2 wieder über seinen ganzen Umfang eine rein zylindrische Form, was erneut zu den schon erwähnten Störungen führen würde. Die Gleitkeile müssen daher bis zum Rand 9 reichen, damit sie beim Aufsetzen des Verschlusses sofort wirksam werden.Guarantee ring 2 begins and no further out of the inner wall 4. Then, below these sliding wedges, the guarantee 2 would again have a purely cylindrical shape over its entire circumference, which would again lead to the disturbances already mentioned. The sliding wedges must therefore extend to the edge 9 so that they take effect immediately when the closure is put on.
Die Figur 3 zeigt eine flächenhafte Darstellung einer bevorzugten Ausführungsform des erfindungsge ässen KunststoffVerschlusses mit Garantiering. Darin bezeichnet 21 eine Querverbindung für den an dieser Stelle unterbrochenen Garantiering 2, welcher Ring am ge¬ nannten Unterbruch zudem mittels des stärker ausgebildeten Steges 22 am Verschluss 1 befestigt ist. Der genannte Unterbruch wirkt somit eindeutig als "Anriss" bzw. Sollbruchstelle. Bei dieser an sich schon bekannten Ausführungsform des Garantieringes 2 wird dieser also nicht nur vom Verschlusskörper 1 getrennt, sondern selber noch aufgeschlitzt, sodass er dann in Schräglage herunter¬ hängt und das erstmalige Oeffnen gut anzeigt. Um das Abreissen der Querverbindung 21 an ihrem einen oder andern Ende vom Garantiering sicherzustellen, empfiehlt es sich, diesen an der genannten Stelle nicht zu steif auszubilden, was bedeutet, dass die Widerhaken wie gezeigt in einigem Abstand von ihr angeordnet werden. Dies er¬ leichtert auch die Herstellung der für die Verschlussfabrikation notwendigen Spritzgussform; diese ist für den dargestellten Ver- schluss sehr aufwendig, ermöglicht aber andererseits gerade des¬ wegen eine hohe Stückzahl von Verschlüssen pro Zeiteinheit. Die oben beschriebene Kombination von einerseits Garantiering mit Widerhaken und Gleitkeil mit andererseits dem genannten Unterbruch im Ring bewirkt eine erhebliche Steigerung der anwendungsmässigen Sicherheit des erfindungsgemässen Verschlusses. FIG. 3 shows an areal representation of a preferred embodiment of the plastic closure according to the invention with a guarantee ring. In it, 21 denotes a cross-connection for the guarantee ring 2, which is interrupted at this point, which ring is also attached to the interruption mentioned by means of the stronger web 22 on the closure 1. The interruption mentioned thus clearly acts as a "crack" or predetermined breaking point. In this embodiment of the guarantee ring 2, which is already known per se this not only separates it from the closure body 1, but also slits it up itself, so that it then hangs down in an inclined position and clearly indicates the first opening. In order to ensure that the cross-connection 21 is torn off at one end or the other of the guarantee ring, it is advisable not to make it too stiff at the location mentioned, which means that the barbs are arranged at a distance from it as shown. This also facilitates the production of the injection mold required for the closure manufacture; this is very complex for the closure shown, but on the other hand it enables a large number of closures per unit of time. The above-described combination of, on the one hand, guarantee ring with barb and sliding wedge with, on the other hand, the above-mentioned interruption in the ring brings about a considerable increase in the application-related safety of the closure according to the invention.

Claims

Patentansprüche Claims
Verschluss für Behälter, mit einem Garantiering (2) an seiner Unterseite, der an seiner Innenwand (4) nach innen ragende, nach oben sich .erstreckende, beim Abheben des Verschlusses sich amClosure for containers, with a guarantee ring (2) on its underside, which projects inwards on its inner wall (4) and extends upwards, when the closure is lifted off
Behälter verkeilende und dadurch ein Abtrennen des Garantieringes (2) vom Verschlusskörper (1) bewirkende Widerhaken (5) trägt, dadurch gekennzeichnet, dass jeder Widerhaken mit wenigstens einem Gleitkeil (8) versehen ist, der sich vom unteren Rand (9) des Garantieringes aus bis zur Spitze (10) des Widerhakens (5) erstreckt.Carrying wedges and thus wrenching the guarantee ring (2) from the closure body (1) causing barbs (5), characterized in that each barb is provided with at least one sliding wedge (8) which extends from the lower edge (9) of the guarantee ring extends to the tip (10) of the barb (5).
2^_ Verschluss nach Anspruch 1, dadurch gekennzeichnet, dass der2 ^ _ closure according to claim 1, characterized in that the
Gleitkeil eine unter einem Winkel (c von ca. 31° zur Innenwand (4) des Garantieringes geneigte Gleitfläche (11) aufweist.Slide wedge has a slide surface (11) inclined at an angle (c of approximately 31 ° to the inner wall (4) of the guarantee ring.
3.3rd
Verschluss nach Anspruch 2, dadurch gekennzeichnet, dass die Gleitfläche (11) tangential in die Spitze (10) des Widerhakens (5) einläuft. 4^Closure according to claim 2, characterized in that the sliding surface (11) runs tangentially into the tip (10) of the barb (5). 4 ^
Verschluss nach einem der vorangehenden Ansprüche, mit nur einem Gleitkeil (8) pro Widerhaken (5), dadurch gekennzeichnet, dass der Gleitkeil (8) in Längsrichtung des Widerhakens (5) gesehen in dessen Mitte angeordnet ist.Closure according to one of the preceding claims, with only one sliding wedge (8) per barb (5), characterized in that the sliding wedge (8), viewed in the longitudinal direction of the barb (5), is arranged in the center thereof.
Verschluss nach Anspruch 4, dadurch gekennzeichnet, dass die Breite (b) des Gleitkeils (8) im Bereich von einem Viertel der Länge (L) des Widerhakens (5) liegt.Closure according to claim 4, characterized in that the width (b) of the sliding wedge (8) is in the range of a quarter of the length (L) of the barb (5).
Verschluss nach Anspruch 4, dadurch gekennzeichnet, dass die Breite (b) des Gleitkeils der Länge (L) des Widerhakens (5) entspricht.Closure according to claim 4, characterized in that the width (b) of the sliding wedge corresponds to the length (L) of the barb (5).
__
Verschluss nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Widerhaken mit Gleitkeil in Relation zu den Stegen (3) angeordnet sind.Closure according to one of the preceding claims, characterized in that the barbs are arranged with a sliding wedge in relation to the webs (3).
Verschluss nach einem der vorangehenden Ansprüche, dadurch ge¬ kennzeichnet, dass der Garantiering (2) an mindestens einer Stelle unterbrochen und mit einer Querverbindung (21) geschlossen ist und dass ein an diesem Unterbruch liegender Steg (22) stärker ausge¬ bildet ist. Closure according to one of the preceding claims, characterized in that the guarantee ring (2) is interrupted at at least one point and closed with a cross-connection (21) and that a web (22) lying at this interruption is more strongly formed.
EP88900807A 1987-01-30 1988-01-27 Tamper-proof ring for containers Expired - Lifetime EP0299017B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88900807T ATE67979T1 (en) 1987-01-30 1988-01-27 CAP WITH GUARANTEE RING FOR CONTAINER.

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH331/87 1987-01-30
CH331/87A CH672109A5 (en) 1987-01-30 1987-01-30
PCT/CH1988/000017 WO1988005754A1 (en) 1987-01-30 1988-01-27 Tamper-proof ring for containers

Publications (3)

Publication Number Publication Date
EP0299017A1 true EP0299017A1 (en) 1989-01-18
EP0299017B1 EP0299017B1 (en) 1991-10-02
EP0299017B2 EP0299017B2 (en) 1999-05-19

Family

ID=4184582

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88900807A Expired - Lifetime EP0299017B2 (en) 1987-01-30 1988-01-27 Tamper-proof ring for containers

Country Status (9)

Country Link
US (1) US4913300A (en)
EP (1) EP0299017B2 (en)
JP (1) JPH0631100B2 (en)
CN (1) CN1009724B (en)
AT (1) ATE67979T1 (en)
CA (1) CA1326000C (en)
CH (1) CH672109A5 (en)
DE (1) DE3865258D1 (en)
WO (1) WO1988005754A1 (en)

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Also Published As

Publication number Publication date
CA1326000C (en) 1994-01-11
CN1009724B (en) 1990-09-26
CN88100538A (en) 1988-09-21
DE3865258D1 (en) 1991-11-07
WO1988005754A1 (en) 1988-08-11
EP0299017B2 (en) 1999-05-19
US4913300A (en) 1990-04-03
EP0299017B1 (en) 1991-10-02
JPH01502656A (en) 1989-09-14
ATE67979T1 (en) 1991-10-15
JPH0631100B2 (en) 1994-04-27
CH672109A5 (en) 1989-10-31

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