EP1607342B1 - plastic press-on cap - Google Patents

plastic press-on cap Download PDF

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Publication number
EP1607342B1
EP1607342B1 EP04405725.5A EP04405725A EP1607342B1 EP 1607342 B1 EP1607342 B1 EP 1607342B1 EP 04405725 A EP04405725 A EP 04405725A EP 1607342 B1 EP1607342 B1 EP 1607342B1
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EP
European Patent Office
Prior art keywords
webs
break
press
cap
cap 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.)
Not-in-force
Application number
EP04405725.5A
Other languages
German (de)
French (fr)
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EP1607342A1 (en
Inventor
Fredy Möckli
Adolf Keller
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.)
SCHOETTLI AG
Medisize Schweiz AG
Original Assignee
SCHOETTLI AG
Schottli AG
Medisize Schweiz AG
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Publication date
Application filed by SCHOETTLI AG, Schottli AG, Medisize Schweiz AG filed Critical SCHOETTLI AG
Publication of EP1607342A1 publication Critical patent/EP1607342A1/en
Application granted granted Critical
Publication of EP1607342B1 publication Critical patent/EP1607342B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
    • B65D41/32—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
    • B65D41/46—Snap-on caps or cap-like covers
    • B65D41/48—Snap-on caps or cap-like covers non-metallic, e.g. made of paper or plastics
    • B65D41/485—Snap-on caps or cap-like covers non-metallic, e.g. made of paper or plastics with integral internal sealing means
    • 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
    • B65D2401/40—Bridges having different cross-sections

Definitions

  • the present invention relates to a Abdschreibkappe made of plastic for attachment to a container with a container neck with retaining bead, wherein the cap has a circumferential jacket wall, on which a pusher is formed and engages a rotating warranty strip on predetermined breaking webs.
  • closures that are placed on relatively wide-necked, thread-free container and hold positively and / or non-positively on the container neck, the container neck has a corresponding circumferential retaining bead.
  • the cap has a peripheral wall, in which a tab is formed for tearing off and a circumferential guarantee strip is formed over a predetermined breaking seam.
  • Abdschreibkappen plastic of the type mentioned are available on the market today.
  • the guarantee strips have a tab and an existing opening or predetermined breaking point in the region of the tab.
  • To open a container with such Abdschreibkappe both hands are needed.
  • the container is held with one hand, while the tab is gripped with the other hand and then demolished the guarantee band.
  • the tapping cap can be opened one-handedly by applying force to the pusher with the thumb and elastically deforming the cap and pressing it over the retaining bead on the neck of the container.
  • GB 2164028 discloses a push-off cap according to the preamble of claim 1.
  • the entire Abdrückkappe consists essentially of two integrally manufactured elements, namely the actual Abdrückkappe 1 and the guarantee strip 2 integrally connected thereto.
  • the actual Abdschreibkappe 1 consists of an upper deck surface 3 and a subsequent circumferential jacket wall 4.
  • On the jacket wall 4 is a pusher 5 molded.
  • the pusher has an actual pressure surface 10, which protrudes perpendicularly from the casing wall and is supported by support ribs 9 reinforced on the casing wall 4.
  • the guarantee strip is realized as a closed ring and is via predetermined breaking webs 6 with the jacket wall 4 of Abdschreibkappe 1 connected. Between each two adjacent predetermined breaking webs 6, an elongated support cam 7 is integrally formed on the shell wall. Between the elongated support cam 7 and the guarantee strip 2 remains a thin, free gap 8. The support cams are so long that they fill almost the entire space between each two adjacent predetermined breaking webs 6. The extremely thin predetermined breaking webs 6 according to the invention would in themselves be destroyed if the guarantee strip 2 did not rest on the supporting cam during placement. When pressing the Abdschreibkappe on the container neck anyway, the predetermined breaking webs are slightly compressed. When placing the Abdschreibkappe a retaining bead 11 must be pressed on a corresponding retaining bead on the container neck, so that these two Garwulste engage each other form-fitting manner.
  • the actual Abdrückkappe 1 keeps on the container neck in addition to a second retaining bead 12 which is integrally formed on the inner surface of the peripheral jacket wall 4.
  • This second retaining bead does not require in the example shown here that this assumes a sealing function.
  • an annular wall is arranged on the inside of the top surface 3 concentric with the circumferential jacket wall 4, which forms the sealing pin 13.
  • the predetermined breaking webs are very resistant because of the order of the chain molecules, since here practically a pure tensile force occurs.
  • the force is introduced, caused by a certain deformation of the cap by a combination of tensile and shear force.
  • the leverage ratios are always more favorable. Accordingly, the diameter of the predetermined breaking points c - f and i - l is preferably chosen to be greater than the diameter of the predetermined breaking webs g and h.
  • predetermined breaking webs a and b the conditions are again unfavorable and accordingly you will advantageously the
  • predetermined breaking webs a and b should have a smaller cross-section than the predetermined breaking webs c - f and i - l.
  • the predetermined breaking points vary depending on the choice of material in the range between 0.05 mm and 0.4 mm. This information is particularly applicable to the choice of polypropylene or polyethylene, both of which have been found suitable for ejector caps. However, other plastics are by no means excluded.
  • the diameters of the predetermined breaking webs in the region of the pusher are typically of the order of 0.05 mm and 0.25 mm. Preferably, however, the diameter is settled rather in the lower region, namely in the range between 0.07 mm and 0.15 mm.
  • the predetermined breaking webs c - f and i - 1 will be chosen more in the upper range, namely with diameters of 0.2 mm to 0.4 mm.
  • the predetermined breaking webs which are arranged diametrically opposite the pusher are selected in a size of 0.1 mm and 0.3 mm, but preferably in particular between 0.15 mm and 0.25 mm. All of the above measures are of course only measures recommendations that must also be seen in relation to Abdrückkappe. In Abdrückkappen with much larger diameters, of course, predetermined breaking webs with larger diameters in question.
  • the predetermined breaking webs are preferably designed conical.
  • This conical design means that the actual separation point or predetermined breaking point of the predetermined breaking webs 6 can be placed exactly where it is desired.
  • the predetermined breaking point which is designated by 14, placed directly on the tether on the guarantee strip 2. This ensures that the remainders of the webs remain on the jacket wall 4. This is therefore chosen because such closures often on relatively small bottles are attached, which are taken directly to the mouth to drink from it. Thus, the lips come into contact with the remaining on the container neck guarantee strip and a certain risk of injury would not be excluded if the remnants of the severed breakaway webs 6 would remain on the guarantee strip.

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

Description

Die vorliegende Erfindung betrifft eine Abdrückkappe aus Kunststoff zur Befestigung auf einem Behälter mit einem Behälterhals mit Haltewulst, wobei die Kappe eine umlaufende Mantelwand aufweist, an der ein Drücker angeformt ist und ein umlaufendes Garantieband über Sollbruchstege angreift.The present invention relates to a Abdrückkappe made of plastic for attachment to a container with a container neck with retaining bead, wherein the cap has a circumferential jacket wall, on which a pusher is formed and engages a rotating warranty strip on predetermined breaking webs.

Es handelt sich dabei um Verschlüsse, die auf relativ weithalsige, gewindefreie Behälter aufgesetzt sind und sich form- und/oder kraftschlüssig auf dem Behälterhals halten, wobei der Behälterhals einen entsprechenden umlaufenden Haltewulst besitzt. Bereits aus der CH-207'849 A ist ein solcher Verschluss bekannt, bei dem die Kappe eine umlaufende Wand aufweist, bei der eine Lasche zum Abreissen angeformt ist und ein umlaufendes Garantieband über eine Sollbruchnaht angeformt ist. Diese frühen Verschlüsse sind noch aus Metall geformt. Versionen in ähnlicher Bauform aus Kunststoff gefertigt sind aber bereits auch seit langem bekannt. So zeigt die US-A-3,707,240 eine Abdrückkappe aus Kunststoff, die sich form- und kraftschlüssig auf einem Behälterhals mit Haltewulst befestigen lässt und zusätzlich zur besseren Dichtung und Halterung mit einem in den Behälterhals eingreifenden Dichtzapfen versehen ist. Dieser Verschluss ist zudem mit einem umlaufenden Garantieband versehen und weist an der Anbindestelle eine umlaufende Sollbruchnaht auf. Das Garantieband weist eine Aufreisslasche auf, ist jedoch als geschlossener Ring konzipiert, weist aber im Bereich der Lasche eine vertikal zur umlaufenden Sollbruchnaht verlaufende Sollbruchstelle im erwähnten Bereich auf. Eine ebensolche Lösung, jedoch ohne den erwähnten Dichtzapfen, ist aus der US-A-3,860,137 bekannt.These are closures that are placed on relatively wide-necked, thread-free container and hold positively and / or non-positively on the container neck, the container neck has a corresponding circumferential retaining bead. Already from the CH-207'849A Such a closure is known in which the cap has a peripheral wall, in which a tab is formed for tearing off and a circumferential guarantee strip is formed over a predetermined breaking seam. These early closures are still made of metal. Versions in a similar design made of plastic but have also been known for a long time. That's how it shows US-A-3,707,240 a plastic push-off cap, which can be positively and non-positively attached to a container neck with retaining bead and in addition to the better Seal and holder is provided with an engaging in the container neck sealing pin. This closure is also provided with a circumferential guarantee strip and has at the tying point on a circumferential predetermined breaking seam. The guarantee strip has a tear-open, but is designed as a closed ring, but has in the region of the tab on a vertical to the circumferential predetermined breaking seam extending breaking point in the range mentioned. A similar solution, but without the mentioned sealing pin, is from the US-A-3,860,137 known.

Erst mit der Weiterentwicklung des Formenbaus erschienen dann Abdrückkappen aus Kunststoff, die als Erstöffnungsgarantie im Bereich des Drückers Sollbruchnähte in Form von Sollbruchstegen aufwiesen. Diese Sollbruchstege wurden gebildet durch eine Reissnaht, die nachträglich perforiert wurde. Solche Verschlüsse sind beispielsweise aus der CH-A-417'378 oder der US-A-3,899,097 bekannt.Only with the further development of the mold making appeared then Abdrückkappen made of plastic, which had as Erstöffnungsgarantie in the range of the pusher breakage in the form of predetermined breaking webs. These predetermined breaking webs were formed by a tear seam, which was subsequently perforated. Such closures are for example from the CH-A-417'378 or the US-A-3,899,097 known.

Im weiteren Verlauf wurden die Abdrückkappen mehrheitlich durch Schnappscharnierverschlüsse verdrängt. Hier, wie auch bei den Drehverschlüssen wurden dann die Garantiebänder über Sollbruchstege angeformt. Um diese Verschlüsse fertigen zu können, waren relativ komplizierte Werkzeuge erforderlich, die sich erst in den 80er-Jahren des letzten Jahrhunderts entwickelten. Zum einen wurden Spritzgussformen mit sternförmigen Schiebern verwendet und später auch Formen mit kollabierbaren Kernen und schliesslich Spritzgusswerkzeuge mit spannzangenartigen Einsätzen, welche von aussen die Kappe umgreifen während des Spritzvorganges und sich beim Entformen elastisch nach aussen erweitern.In the further course the Abdrückkappen were mostly displaced by snap hinge closures. Here, as well as with the screw caps, the guarantee bands were then formed over predetermined breaking webs. In order to produce these closures, relatively complicated tools were needed, which developed only in the 80s of the last century. On the one hand injection molds with star-shaped slides were used and later also with molds Collapsible cores and finally injection molding tools with collet-like inserts, which enclose the cap from the outside during the injection process and expand elastically to the outside during demolding.

Abdrückkappen aus Kunststoff der eingangs genannten Art sind heute auf dem Markt erhältlich. Die Garantiebänder weisen dabei eine Lasche auf und eine im Bereich der Lasche vorhandene Öffnung oder Sollbruchstelle. Zum Öffnen eines Behälters mit einer solchen Abdrückkappe werden beide Hände benötigt. Mit einer Hand wird der Behälter gehalten, während mit der anderen Hand die Lasche gegriffen wird und danach das Garantieband abgerissen. Ist das Garantieband entfernt, lässt sich de Abdrückkappe einhändig öffnen, indem mit dem Daumen auf den Drücker Kraft ausgeübt wird und die Kappe elastisch verformt und über den Haltewulst am Behälterhals hinweg gedrückt wird.Abdrückkappen plastic of the type mentioned are available on the market today. The guarantee strips have a tab and an existing opening or predetermined breaking point in the region of the tab. To open a container with such Abdrückkappe both hands are needed. The container is held with one hand, while the tab is gripped with the other hand and then demolished the guarantee band. Once the tamper-evident band is removed, the tapping cap can be opened one-handedly by applying force to the pusher with the thumb and elastically deforming the cap and pressing it over the retaining bead on the neck of the container.

GB 2164028 offenbart eine Abdrückkappe nach dem Oberbegriff des Anspruchs 1. GB 2164028 discloses a push-off cap according to the preamble of claim 1.

Es ist bekannt, dass bei der Fertigung eines Kunststoffverschlusses die Kettenmoleküle des Kunststoffes während des Spritzvorganges in den Sollbruchstegen sich längs ausrichten. Die Zerstörung der Sollbruchstege durch Zug in der Verlaufrichtung der Sollbruchstege benötigt dabei wesentlich mehr Kraft als eine Zerstörung durch eine Kraft, die senkrecht zur Verlaufsrichtung der Sollbruchstege und damit senkrecht zu den Molekülketten auftritt. Dieses Problem ist bei den Drehverschlüssen relativiert. Bei den Drehverschlüssen erfolgt über das Gewinde eine Kraftübersetzung, wodurch die erforderlichen Kräfte, obwohl praktisch alle Sollbruchstege gleichzeitig zerstört werden, aufbringbar sind. Bei den Abdrückkappen werden die Kräfte einseitig im Bereich des Drückers angelegt, trotzdem sind die erforderlichen Kräfte bisher so gross, dass ein komfortables Öffnen sich nicht realisieren lässt.It is known that in the manufacture of a plastic closure, the chain molecules of the plastic during the injection process in the predetermined breaking webs align longitudinally. The destruction of the predetermined breaking webs by train in the running direction of the predetermined breaking webs requires much more force than destruction by a force that occurs perpendicular to the course of the predetermined breaking webs and thus perpendicular to the molecular chains. This problem is relative to the screw caps. Both Turning closures via the thread a power transmission, whereby the required forces, although virtually all breakage webs are destroyed simultaneously, can be applied. In the Abdrückkappen the forces are applied on one side in the area of the pusher, yet the required forces are so far so large that a comfortable opening can not be realized.

Es ist daher die Aufgabe der vorliegenden Erfindung, eine Abdrückkappe der eingangs genannten Art zu realisieren, die sich einhändig öffnen lässt.It is therefore the object of the present invention to realize a Abdrückkappe of the type mentioned, which can be opened with one hand.

Diese Aufgabe löst eine Abdrückkappe mit den Merkmalen des Patentanspruches 1.This object is achieved by a push-off cap having the features of patent claim 1.

Dank dem neuen Konzept, die Sollbruchstege entlang dem Umfang zu variieren, lassen sich unterschiedliche Öffnungsfunktionen erzielen. Diesbezüglich wird auf die nachfolgende Beschreibung verwiesen, in der mit Bezug auf die Zeichnung die Erfindung im Detail erläutert wird. Die Zeichnungen zeigen eine bevorzugte Ausführungsform des Erfindungsgegenstandes, an Hand welcher auch hiervon abweichende Lösungen nachfolgend erläutert werden. Es zeigt:

Figur 1
eine Seitenansicht auf den Abdrückverschluss mit Blick auf den Drücker und
Figur 2
dieselbe Ansicht der Abdrückkappe um 90° gedreht.
Figur 3
zeigt eine Aufsicht auf die Abdrückkappe.
Figur 4
stellt einen diametralen Vertikalschnitt durch die Kappe nach Figur 2 entlang der Linie A-A in einem grösseren Massstab dar, während
Figur 5
einen Horizontalschnitt entlang der Linie B-B nach Figur 2 zeigt mit Blick in die Innenseite der Abdrückkappe unter Weglassung des Garantiebandes.
Figur 6
zeigt das vergrösserte Detail D, wie in Figur 5 angegeben, und
Figur 7
das Detail C nach Figur 4 im vergrösserten Massstab.
Thanks to the new concept of varying the break-off webs along the circumference, different opening functions can be achieved. In this regard, reference is made to the following description, in which reference to the drawing, the invention is explained in detail. The drawings show a preferred embodiment of the subject invention, on the basis of which also deviating solutions are explained below. It shows:
FIG. 1
a side view of the Abdrückverschluss with a view of the pushers and
FIG. 2
the same view of the Abdrückkappe rotated by 90 °.
FIG. 3
shows a view of the Abdrückkappe.
FIG. 4
makes a diametrical vertical section through the cap FIG. 2 along the line AA on a larger scale while
FIG. 5
a horizontal section along the line BB FIG. 2 shows, looking into the inside of the Abdrückkappe with omission of the guarantee strip.
FIG. 6
shows the enlarged detail D, as in FIG. 5 specified, and
FIG. 7
the detail C after FIG. 4 on an enlarged scale.

Die gesamte Abdrückkappe besteht im wesentlichen aus zwei einstückig gefertigten Elementen, nämlich der eigentlichen Abdrückkappe 1 und dem damit einstückig verbundenen Garantieband 2. Die eigentliche Abdrückkappe 1 besteht aus einer oberen Deckfläche 3 und einer anschliessenden, umlaufenden Mantelwand 4. An der Mantelwand 4 ist ein Drücker 5 angeformt. Der Drücker hat eine eigentliche Druckfläche 10, die senkrecht von der Mantelwand absteht und durch Stützrippen 9 verstärkt an der Mantelwand 4 gehalten ist.The entire Abdrückkappe consists essentially of two integrally manufactured elements, namely the actual Abdrückkappe 1 and the guarantee strip 2 integrally connected thereto. The actual Abdrückkappe 1 consists of an upper deck surface 3 and a subsequent circumferential jacket wall 4. On the jacket wall 4 is a pusher 5 molded. The pusher has an actual pressure surface 10, which protrudes perpendicularly from the casing wall and is supported by support ribs 9 reinforced on the casing wall 4.

Das Garantieband ist als geschlossener Ring realisiert und ist über Sollbruchstege 6 mit der Mantelwand 4 der Abdrückkappe 1 verbunden. Zwischen jeweils zwei benachbarten Sollbruchstegen 6 ist jeweils ein länglicher Stütznocken 7 an der Mantelwand angeformt. Zwischen den länglichen Stütznocken 7 und dem Garantieband 2 verbleibt ein dünner, freier Spalt 8. Die Stütznocken sind so lang, dass sie fast den gesamten Zwischenraum zwischen jeweils zwei benachbarten Sollbruchstegen 6 ausfüllen. Die erfindungsgemäss extrem dünnen Sollbruchstege 6 würden an sich zerstört werden, wenn beim Aufsetzen das Garantieband 2 nicht auf den Stütznocken aufliegen würde. Beim Aufdrücken der Abdrückkappe auf dem Behälterhals werden trotzdem die Sollbruchstege leicht zusammengestaucht. Beim Aufsetzen der Abdrückkappe muss ein Haltewulst 11 über einen entsprechenden Haltewulst am Behälterhals gedrückt werden, so dass diese beiden Haltewulste einander formschlüssig gegenseitig hintergreifen.The guarantee strip is realized as a closed ring and is via predetermined breaking webs 6 with the jacket wall 4 of Abdrückkappe 1 connected. Between each two adjacent predetermined breaking webs 6, an elongated support cam 7 is integrally formed on the shell wall. Between the elongated support cam 7 and the guarantee strip 2 remains a thin, free gap 8. The support cams are so long that they fill almost the entire space between each two adjacent predetermined breaking webs 6. The extremely thin predetermined breaking webs 6 according to the invention would in themselves be destroyed if the guarantee strip 2 did not rest on the supporting cam during placement. When pressing the Abdrückkappe on the container neck anyway, the predetermined breaking webs are slightly compressed. When placing the Abdrückkappe a retaining bead 11 must be pressed on a corresponding retaining bead on the container neck, so that these two Haltewulste engage each other form-fitting manner.

Die eigentliche Abdrückkappe 1 hält sich auf dem Behälterhals zusätzlich mit einer zweiten Haltewulst 12, die auf der Innenfläche der umlaufenden Mantelwand 4 angeformt ist. Statt einer Haltewulst wäre es selbstverständlich auch möglich, die Verbindung mit entsprechenden Haltenocken zu realisieren. Dieser zweite Haltewulst bedingt im hier dargestellten Beispiel nicht, dass dieser eine Dichtfunktion übernimmt. Hierzu ist auf der Innenseite der Deckfläche 3 konzentrisch zur umlaufenden Mantelwand 4 eine Ringwand angeordnet, welche den Dichtzapfen 13 bildet.The actual Abdrückkappe 1 keeps on the container neck in addition to a second retaining bead 12 which is integrally formed on the inner surface of the peripheral jacket wall 4. Instead of a holding bead, it would of course also be possible to realize the connection with corresponding retaining cam. This second retaining bead does not require in the example shown here that this assumes a sealing function. For this purpose, an annular wall is arranged on the inside of the top surface 3 concentric with the circumferential jacket wall 4, which forms the sealing pin 13.

In der Figur 5 sind sämtliche Sollbruchstege 6 mit Buchstaben a-1 gekennzeichnet. Es ist das Verdienst der vorliegenden Erfindung, eine einfache Lösung gefunden zu haben, um die Funktion einer Abdrückkappe durch Variation der Durchmesser der Sollbruchstege verändern zu können. Für die Einhandöffnung die sich die Erfindung zur Aufgabe gestellt hat ist es wichtig, dass die Sollbruchstege im Bereich des Drückers 5 mit relativ wenig Aufwand sich zerstören lassen. Entsprechend sind die beiden Sollbruchstege g und h an ihrer Sollbruchstelle auf einen Durchmesser reduziert, der geringer ist als der Durchmesser an den Sollbruchstellen der anderen Sollbruchstege. Dies hat damit zu tun, dass die Krafteinleitung im Bereich des Drückers praktisch in der Verlaufsrichtung der Sollbruchstege verläuft. In dieser Richtung sind die Sollbruchstege wegen der Ordnung der Kettenmoleküle sehr wiederstandfähig, da hier praktisch eine reine Zugkraft auftritt. Bei den weiter seitlichen Sollbruchstegen erfolgt die Krafteinleitung, hervorgerufen durch eine gewisse Verformung der Kappe durch eine Kombination von Zug- und Scherkraft. Hinzu kommt zudem, dass sich die Hebelverhältnisse immer günstiger auswirken. Entsprechend wird bevorzugterweise der Durchmesser der Sollbruchstellen c - f und i - l grösser gewählt als der Durchmesser der Sollbruchstege g und h. Bei den Sollbruchstegen a und b sind die Verhältnisse wieder ungünstig und entsprechend wird man vorteilhafterweise die Sollbruchstege a und b ebenfalls im Querschnitt geringer gestalten als die Sollbruchstege c - f und i - l.In the FIG. 5 are all predetermined breaking webs 6 marked with letters a-1. It is the merit of the present invention to have found a simple solution to change the function of a Abdrückkappe by varying the diameter of the predetermined breaking webs. For the single-handed opening which the invention has set itself the task, it is important that the predetermined breaking webs in the region of the pusher 5 can be destroyed with relatively little effort. Accordingly, the two predetermined breaking webs g and h are reduced at their predetermined breaking point to a diameter which is less than the diameter at the predetermined breaking points of the other break webs. This has to do with the fact that the introduction of force in the region of the pusher runs virtually in the direction of the predetermined breaking webs. In this direction, the predetermined breaking webs are very resistant because of the order of the chain molecules, since here practically a pure tensile force occurs. In the laterally side breakage webs, the force is introduced, caused by a certain deformation of the cap by a combination of tensile and shear force. In addition, there is also the fact that the leverage ratios are always more favorable. Accordingly, the diameter of the predetermined breaking points c - f and i - l is preferably chosen to be greater than the diameter of the predetermined breaking webs g and h. In the predetermined breaking webs a and b, the conditions are again unfavorable and accordingly you will advantageously the In addition, predetermined breaking webs a and b should have a smaller cross-section than the predetermined breaking webs c - f and i - l.

Erfahrungsgemäss lassen sich die Sollbruchstellen je nach Materialwahl im Bereich zwischen 0,05 mm und 0,4 mm variieren. Diese Angaben sind insbesondere zutreffend bei der Wahl von Polypropylen oder Polyäthylen, die sich beide für Abdrückkappen als geeignet erwiesen haben. Andere Kunststoffe sind jedoch keineswegs ausgeschlossen. Typischerweise liegen die Durchmesser der Sollbruchstege im Bereich des Drückers in der Grössenordnung von 0,05 mm und 0,25 mm. Bevorzugterweise wird jedoch der Durchmesser eher im unteren Bereich angesiedelt, nämlich im Bereich zwischen 0,07 mm und 0,15 mm. Bei der Wahl dieser Durchmesser der Sollbruchstege im Bereich nahe des Drückers wird man daher die Sollbruchstege c - f und i - l eher im oberen Bereich wählen, nämlich bei Durchmessern von 0,2 mm bis 0,4 mm. Demgegenüber sind die Sollbruchstege, welche dem Drücker diametral gegenüber angeordnet sind in einer Grösse von 0,1 mm und 0,3 mm gewählt, bevorzugterweise jedoch insbesondere zwischen 0,15 mm und 0,25 mm. Alle vorgenannten Massangaben sind selbstverständlich nur Massempfehlungen, die zudem in Relation zur Abdrückkappe gesehen werden müssen. Bei Abdrückkappen mit wesentlich grösseren Durchmessern kommen selbstverständlich auch Sollbruchstege mit grösseren Durchmessern in Frage.Experience has shown that the predetermined breaking points vary depending on the choice of material in the range between 0.05 mm and 0.4 mm. This information is particularly applicable to the choice of polypropylene or polyethylene, both of which have been found suitable for ejector caps. However, other plastics are by no means excluded. The diameters of the predetermined breaking webs in the region of the pusher are typically of the order of 0.05 mm and 0.25 mm. Preferably, however, the diameter is settled rather in the lower region, namely in the range between 0.07 mm and 0.15 mm. When choosing these diameters of the predetermined breaking webs in the region near the pusher, therefore, the predetermined breaking webs c - f and i - 1 will be chosen more in the upper range, namely with diameters of 0.2 mm to 0.4 mm. In contrast, the predetermined breaking webs which are arranged diametrically opposite the pusher are selected in a size of 0.1 mm and 0.3 mm, but preferably in particular between 0.15 mm and 0.25 mm. All of the above measures are of course only measures recommendations that must also be seen in relation to Abdrückkappe. In Abdrückkappen with much larger diameters, of course, predetermined breaking webs with larger diameters in question.

Werden solche Abdrückkappen auf grösseren Behältnissen angebracht, so kann es wünschenswert sein, die Abdrückkappe leicht wieder auf den Behälter aufsetzen zu können. Dies lässt sich bei der erfindungsgemässen Ausgestaltung dadurch realisieren, dass man die Sollbruchstege a und b gegenüber den anderen Sollbruchstegen im Durchmesser vergrössert. In diesem Falle dienen dann die Sollbruchstege als Gelenke. Bei der normalen Einhandöffnung werden diese beiden Stege a und b nicht mehr durchgetrennt und der Verschluss bleibt an diesen beiden Stegen hängen. Da zudem das Garantieband als geschlossener Ring gestaltet ist, verbleibt dieser auf der Flasche und entsprechend bleibt die Abdrückkappe bei der vorgenannten Ausgestaltungsform am Garantieband und damit indirekt auch an der Flasche befestigt. Damit lässt sich die erfindungsgemässe Abdrückkappe mit einfachem Aufwand in eine Abdrückkappe mit sogenanntem Schlackerverschluss umgestalten.If such Abdrückkappen mounted on larger containers, it may be desirable to easily put the Abdrückkappe back on the container can. In the case of the embodiment according to the invention, this can be achieved by enlarging the predetermined breaking webs a and b in relation to the other breaking webs in the diameter. In this case, then serve the predetermined breaking webs as joints. In the normal one-handed opening, these two webs a and b are no longer severed and the closure remains hanging on these two webs. In addition, since the guarantee strip is designed as a closed ring, this remains on the bottle and accordingly the Abdrückkappe remains in the aforementioned embodiment on the guarantee strip and thus indirectly attached to the bottle. Thus, the Abdrückkappe invention can be easily converted into a Abdrückkappe with so-called Schlacker closure.

Wie insbesondere aus den Figuren 6 und 7 ersichtlich ist, werden die Sollbruchstege bevorzugterweise konisch gestaltet. Diese konische Gestaltung führt dazu, dass die eigentliche Trennstelle beziehungsweise Sollbruchstelle der Sollbruchstege 6 exakt dorthin gelegt werden kann, wo diese erwünscht ist. Im vorliegenden Fall ist die Sollbruchstelle, die mit 14 bezeichnet ist, direkt an der Anbindstelle am Garantieband 2 gelegt. Hierdurch wird sichergestellt, dass die Reste der Stege an der Mantelwand 4 verbleiben. Dies wird deshalb so gewählt, weil solche Verschlüsse oftmals auf relativ kleinen Flaschen angebracht werden, die direkt an den Mund genommen werden um daraus zu trinken. Damit kommen die Lippen in Kontakt mit dem am Behälterhals verbleibenden Garantieband und eine gewisse Verletzungsgefahr wäre nicht ausgeschlossen, wenn die Reste der durchtrennten Sollbruchstege 6 am Garantieband verbleiben würden.As in particular from the FIGS. 6 and 7 it can be seen, the predetermined breaking webs are preferably designed conical. This conical design means that the actual separation point or predetermined breaking point of the predetermined breaking webs 6 can be placed exactly where it is desired. In the present case, the predetermined breaking point, which is designated by 14, placed directly on the tether on the guarantee strip 2. This ensures that the remainders of the webs remain on the jacket wall 4. This is therefore chosen because such closures often on relatively small bottles are attached, which are taken directly to the mouth to drink from it. Thus, the lips come into contact with the remaining on the container neck guarantee strip and a certain risk of injury would not be excluded if the remnants of the severed breakaway webs 6 would remain on the guarantee strip.

Im vorliegenden Fall ist die Erfindung insbesondere erläutert an Hand eines runden Verschlusses. Prinzipiell lassen sich jedoch Abdrückkappen auch oval oder in anderen Formen gestalten. Sind die Formen einer Abdrückkappe von der runden Form abweichend, so treten beim Öffnen auch andere Kraftverhältnisse und andere Hebelwirkungen auf und entsprechend lassen sich die Querschnitte der Sollbruchstege auf diese Verhältnisse anpassen.In the present case, the invention is explained in particular with reference to a round closure. In principle, however, Abdrückkappen can also make oval or other shapes. If the shapes of a push-off cap deviate from the round shape, other force relationships and other leverage effects also occur upon opening and, accordingly, the cross-sections of the break-off webs can be adapted to these conditions.

Die hier geforderte Präzision ist für eine Abdrückkappe, die zu den ausgesprochen kostengünstigen Varianten der Kunststoffverschlüsse gehört, ungewöhnlich. Dass sich dies trotzdem realisieren lässt liegt daran, dass für die Herstellung hier Spritzgussformen mit spannzangenartigen Einsätzen verwendet worden sind. Auch diese Technologie ist an sich für Kunststoffverschlüsse in diesem Preissegment ungewöhnlich.The precision required here is unusual for a Abdrückkappe, which belongs to the extremely cost-effective variants of plastic closures. That this can still be realized is due to the fact that for the production here injection molds have been used with collet-like inserts. Again, this technology is unusual for plastic closures in this price segment.

Die aussergewöhnlich feinen Anbindestellen und Sollbruchstege mit hoher Prozesssicherheit zu realisieren, ist nur dank der Verwendung von Spannzangen erreichbar. Diese hohe Prozesssicherheit führt trotz der relativ teuren Spritzgussformen zu einer hohen Wirtschaftlichkeit.The exceptionally fine attachment points and breakaway webs with high process reliability to realize, is only thanks to the Use of collets available. Despite the relatively expensive injection molds, this high process reliability leads to a high level of economic efficiency.

Liste der BezugszahlenList of reference numbers

11 eigentliche Abdrückkappeactual push-off cap 22 Garantiebandguarantee strip 33 obere Deckflächeupper deck area 44 umlaufende Mantelwandcircumferential jacket wall 55 Drückerhandle 66 SollbruchstegeBreakaway webs 77 Stütznockensupport cams 88th freier Spaltfree gap 99 Stützrippensupport ribs 1010 Druckflächeprint area 1111 Haltewulstretaining bead 1212 zweiter Haltewulstsecond retaining bead 1313 Dichtzapfensealing plug 1414 SollbruchstelleBreaking point

Claims (13)

  1. A press-on cap made of plastics for fastening to a container comprising a container neck with a retaining bead, the cap (1) comprising a peripheral skirt (4) on which a push-piece (5) is integrally formed and on which a peripheral guarantee strip (2) acts via break-off webs (6), the guarantee strip (6) being designed completely and without tabs as an unweakened closed ring and being integrally formed via break-off webs (6), characterised in that the break-off webs (6) have different diameters and, as a result, permit a one-handed opening of the cap for the first time.
  2. The press-on cap according to Claim 1, characterised in that the break-off webs (g, h) in the vicinity of the push-piece (5) have a smaller diameter than the break-off webs (c-f; i-l) directly following in the peripheral direction.
  3. The press-on cap according to Claim 1, characterised in that the break-off webs (a, b) in the region diametrically opposing the push-piece (5) have a smaller diameter than the adjacent break-off webs (c-f; i-l).
  4. The press-on cap according to Claim 3, characterised in that the break-off webs (a, b) in the region opposing the push-piece (5) have a greater diameter than the break-off webs (g, h) in the region of the push-piece (5) but a smaller diameter than the adjacent break-off webs (c-f; i-l).
  5. The press-on cap according to Claim 2, characterised in that at least one connecting point is present between the guarantee strip and the cap, diametrically opposing the push-piece (5), said connecting point forming a joint for reclosing the cap.
  6. The press-on cap according to Claim 1, characterised in that in diameter the break-off webs (6) reduce in cross section from the cap skirt (4) towards the guarantee strip (2).
  7. The press-on cap according to Claim 1, characterised in that in diameter the break-off webs (6) reduce in cross section from the guarantee strip (2) towards the skirt (4).
  8. The press-on cap according to Claim 1, characterised in that support cams are integrally formed on the skirt (4) between each two adjacent break-off webs (6), said support cams extending approximately down to the upper edge of the guarantee strip (2).
  9. The press-on cap according to Claim 1, characterised in that said press-on cap is produced without a mould slide by means of a chuck.
  10. The press-on cap according to Claim 1, characterised in that the break-off webs (6) relative to their smallest diameter vary between 0.05 mm and 0.45 mm.
  11. The press-on cap according to Claim 2, characterised in that the break-off webs (6; g, h) in the region of the push-piece (5) have a minimum diameter of between 0.05 mm and 0.25 mm, more preferably of between 0.15 mm and 0.25 mm.
  12. The press-on cap according to Claim 3, characterised in that the break-off webs (6; a, b) in the region diametrically opposing the push-piece (5) have a minimum diameter of between 0.2 mm and 0.45 mm, more preferably of between 0.25 mm and 0.35 mm.
  13. The press-on cap according to Claim 8, characterised in that the distance between the lower edge of the support cams (7) and the upper edge of the guarantee strip (2) ranges between 0.15 mm and 0.25 mm.
EP04405725.5A 2003-12-15 2004-11-23 plastic press-on cap Not-in-force EP1607342B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH21392003 2003-12-15
CH21392003 2003-12-15

Publications (2)

Publication Number Publication Date
EP1607342A1 EP1607342A1 (en) 2005-12-21
EP1607342B1 true EP1607342B1 (en) 2013-04-24

Family

ID=34638024

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04405725.5A Not-in-force EP1607342B1 (en) 2003-12-15 2004-11-23 plastic press-on cap

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Country Link
US (1) US20050127023A1 (en)
EP (1) EP1607342B1 (en)
JP (1) JP2005178905A (en)
ES (1) ES2424299T3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7775389B2 (en) * 2006-03-17 2010-08-17 Poppet International Pty Ltd Closure for containers
CA2888874C (en) * 2014-09-19 2016-11-15 Stanpac Inc. Tamper evident closure and method of making same

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Publication number Priority date Publication date Assignee Title
US1326813A (en) * 1919-12-30 Nathaniel b
US2043226A (en) * 1934-11-22 1936-06-09 Warren H Beider Sealing device for bottles
US2772802A (en) * 1950-10-27 1956-12-04 Woydatt Leszek Reusable bottle stopper with severable skirt portion
US2930063A (en) * 1958-02-11 1960-03-29 Morton B Stull Dispensing cap for containers
US3300073A (en) * 1963-12-05 1967-01-24 Benz Erwin Elastic closure for a container opening
FR1484391A (en) * 1966-06-23 1967-06-09 Dale Ltd John Container closure
US3430777A (en) * 1967-06-22 1969-03-04 Vincent J Esposito Jr Pilferproof cap with integral pressure actuated sealing means
US3606063A (en) * 1969-05-22 1971-09-20 Klm Co Threaded plastic closure
BE753828A (en) * 1969-10-21 1971-01-25 Segmuller A G WASHABLE BOTTLE LID
DE2021372A1 (en) * 1970-04-30 1971-11-11 Kaltenhauser Ludwig A Closing cap made of elastic plastic for bottles with a bead neck rim
US3707240A (en) * 1970-08-27 1972-12-26 Polytop Corp Closure with tear-off skirt
US3860137A (en) * 1972-11-10 1975-01-14 Polytop Corp Press-top type child-resistant closure
FR2218257A1 (en) * 1973-02-16 1974-09-13 Grussen Jean
CH553696A (en) * 1973-05-09 1974-09-13 Obrist Albert & Co PLASTIC CAP FOR A CONTAINER, IN PARTICULAR A BOTTLE.
US3913771A (en) * 1973-06-01 1975-10-21 Anchor Hocking Corp Closure cap with tamper indicator
US4043475A (en) * 1976-10-15 1977-08-23 Glyndon Plastics Limited Caps and containers
US4470513A (en) * 1982-09-23 1984-09-11 Ethyl Molded Products Company Tamper-indicating closure
US4527704A (en) * 1984-01-26 1985-07-09 Owens-Illinois, Inc. Tamper indicating package
CH664744A5 (en) * 1984-09-05 1988-03-31 Asepta Ag CONTAINER WITH FLEXIBLE LID.
US5472106A (en) * 1991-11-08 1995-12-05 Pano Cap (Canada) Limited Tamper resistant closure cap and a method of operation therefor
US5249704A (en) * 1992-09-11 1993-10-05 Klaus Boetzkes Sealing cap
GB0003882D0 (en) * 2000-02-18 2000-04-05 Camlab Limited Receptacle
US6739466B1 (en) * 2002-10-03 2004-05-25 Rexam Medical Packaging Inc. Folding finger tamper-indicating band arrester
US8517194B2 (en) * 2004-03-11 2013-08-27 Berry Plastics Corporation Tamper-indicating closure and package

Also Published As

Publication number Publication date
JP2005178905A (en) 2005-07-07
US20050127023A1 (en) 2005-06-16
ES2424299T3 (en) 2013-09-30
EP1607342A1 (en) 2005-12-21

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