EP0548010B1 - Sealing cap - Google Patents

Sealing cap Download PDF

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Publication number
EP0548010B1
EP0548010B1 EP92810956A EP92810956A EP0548010B1 EP 0548010 B1 EP0548010 B1 EP 0548010B1 EP 92810956 A EP92810956 A EP 92810956A EP 92810956 A EP92810956 A EP 92810956A EP 0548010 B1 EP0548010 B1 EP 0548010B1
Authority
EP
European Patent Office
Prior art keywords
closure
indicator
closure unit
unit according
spout
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP92810956A
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German (de)
French (fr)
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EP0548010A1 (en
Inventor
Elmar Mock
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.)
Tetra Laval Holdings and Finance SA
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Tetra Laval Holdings and Finance SA
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Publication date
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Publication of EP0548010A1 publication Critical patent/EP0548010A1/en
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    • 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
    • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
    • B65D5/42—Details of containers or of foldable or erectable container blanks
    • B65D5/72—Contents-dispensing means
    • B65D5/74—Spouts
    • B65D5/746—Spouts formed separately from the container

Definitions

  • the invention is in the field of the packaging industry and relates to a closure unit according to the preamble of the independent claim.
  • closure units On containers for liquids such as metal cans or containers made of coated cardboard, for a reclosable opening and for convenient pouring, closure units, preferably made of plastic, consisting of a pouring part with a pouring opening and a closing part closing the pouring opening of the pouring part, are used in an opening of the container.
  • the two Swiss patent applications 2739 / 91-2 and 2740 / 91-9 by the same applicant describe such closure units.
  • the closure units described are cast using a multi-material injection molding process and consist of at least two materials which differ in at least one property. Further closure units are disclosed in WO 90/14287 and WO 84/00531, the closure unit according to WO 90/14287 consisting of two different materials.
  • a disadvantage of the known solutions is that after the first opening, the closure quality is often impaired because, for example, part of the closure function is destroyed or the anchoring of the closure part is no longer fully preserved.
  • Another disadvantage is usually that an additional manufacturing or assembly step is necessary to manufacture the tear-open element.
  • a visible, irreversible display indicator
  • the change in the indicator when it is opened for the first time should have no effect on the closing and sealing function of the closure unit.
  • This indicator should be able to be produced together with the closure unit without additional measures during the manufacture of the closure unit, in particular without an additional manufacture and / or assembly step, quasi in the same operation.
  • the closure unit according to the invention has at least two areas which each consist of one material, the materials of the different areas differing in at least one property. At least one of the areas extends both in the closure part and in the pouring part of the closure unit.
  • an indicator for example, one of the areas has a partial area that is located on the outside of the closure unit extends from the closure part to the pouring part and is anchored there.
  • the partial area serving as an indicator consists of one material and the outside of the pouring part, on which the indicator lies, is made of the other material.
  • the strength of the partial area and that of its anchoring are coordinated with one another in such a way that the first time they are opened, either the anchoring is released or the partial area is broken.
  • closure unit If the two materials are different in color, it is very easy to see whether the closure unit is new or reclosed.
  • a prerequisite for the fact that the closure quality is not influenced by this first opening is that the partial area serving as an indicator is not included in the closing and sealing function of the closure unit.
  • the closure unit according to the invention is produced in one operation using the method of multi-material injection molding. Only with such a method is it possible to produce the closure unit in the closed state with an indicator in the intact state in one operation.
  • the multi-material injection molding process is based on the fact that a pre-molded part is cast into a mold with a first material, that the mold is then at least partially replaced or moved away from the pre-molded part and that the closure unit is then cast with the second material, whereby the pre-molded part partially serves as a casting mold and is thereby at least partially encapsulated by the second material. This creates areas of two materials cast into one another, the contact surfaces adhering to one another more firmly or less firmly, depending on the casting parameters and material pairing.
  • the multi-material injection molding process is not limited to two materials, three or more materials can also be molded one above the other and / or around one another.
  • FIG. 1 shows an exemplary embodiment of the closure unit 1 according to the invention.
  • the pouring part 3 essentially consists of a closure part 2 and a pouring part 3, which are connected to one another for example with a hinge 5.
  • the pouring part 3 has an essentially tubular pouring spout 30, one opening (pouring opening) of which is covered by the closing part 2 in the closed state, and which carries a base 31 in the region of the other opening which is used for fastening to a container.
  • An indicator 8 can also be seen, which essentially consists of a web 80 and an anchoring 81, here, for example, in the form of a fork.
  • the web 80 extends from the closure part 2 over the outer surface of the spout 30.
  • FIG. 2 shows the same closure unit as FIG. 1, cut along the line labeled 6 in FIG. 1.
  • a wall 7 of a container can be seen here, which lies in the region of the container opening above the base 31 and is connected to it, for example, by welding.
  • A is the level in which the base 31 and the opening of the spout 30 extending against the container extend.
  • B denotes a surface in which the pouring opening 10 covered by the closure part 2 lies.
  • the pivot axis 51 of the hinge 5 for the pivotable connection of the closure part 2 and the pouring part 3 lies approximately in the plane B.
  • the closure part 2 can be seen, which covers the spout 30 in a region 14 and thus extends over the plane B in the closed state.
  • a cam 15 is provided in this overlap area, which protrudes toward the closure part 2 and serves as a locking device.
  • the closure part 2 has a molded-on opening lip 21 in the same area, which is used to open the closure unit.
  • the indicator 8, consisting essentially of the web 80 and the anchoring 81, is molded onto this lip 21.
  • the anchoring 81 extends between the container wall 7 and the base 31 and is held there, for example, by welding.
  • a further cam 18 is provided integrally with the spout, which causes the web to have a smaller cross section at this point, such that this point can serve as a predetermined breaking point 85.
  • the weakening is to be designed in such a way that the predetermined breaking point is weaker than the connection of the anchoring 81 to the container wall 7 and / or the base 31.
  • the closure part 2 When the closure part 2 is closed, it is also slightly deformed before it changes to the closed position. The deformation is also necessary because the lip 21 must be pulled over the cam 15 so that it clicks into place. Since the web 80 does not adhere or only sticks to the spout 30, it can easily be seen on the reclosed closure unit that it is torn; this is particularly the case if the material of the web 80 differs in color from the material of the spout 30.
  • cam 18 where it protrudes the furthest, is rounded and, following the rounding, rises steeply on one side and rises more flatly on the other from the surface of the spout 30, because it is produced using simple casting tools can be.
  • FIG. 3 shows, as a detail of a section similar to the section of FIG. 2, a further embodiment of the predetermined breaking point 85 in the web 80.
  • the surface of the web 80 facing towards the outside has a notch 19, while the surface of the spout 30 runs essentially continuously .
  • the web 80 can run anywhere on the outer surface of the spout 30. Several such webs can also be arranged.
  • the predetermined breaking point 85 can also be placed just below the lip 21, so that after the tear-open part 2 no web part remains.
  • FIG. 4 shows, in the same representation as FIG. 2, a further embodiment of the indicator 8.
  • This in turn has the shape of a web 80 with a predetermined breaking point 85 and an anchoring 81 that extends between the container wall 7 and the base 31 and is, for example, in the area of the lip 21 integrally formed on the closure part 2.
  • the web In the anchoring area, the web has a further cam 82, which is used to position the closure unit on the container when it is mounted on it before it is welded to it, for example.
  • FIG. 5 shows, in the same representation as FIG. 4, a further, exemplary embodiment of the indicator 8, which here also bears a cam 82 which serves to position the closure unit on the container.
  • the indicator 8 is not anchored by an anchoring between the container wall 7 and the base 31, but by means of a form-fitting connection 83 in the spout 30 itself.
  • the form-fitting connection 83 exists essentially from an indentation in the spout, which is poured out when the second material is poured.
  • FIG. 6 shows, again in the same representation as FIG. 4, a further exemplary embodiment of the indicator 8.
  • This in turn consists of a web 80 molded onto the closure part 2, for example in the area of the lip 21, with a form-fitting anchoring 84 in the spout 30.
  • this indicator has no predetermined breaking point.
  • the anchoring 84 is designed in such a way that the effort required to solve it is low.
  • the form fit is designed here, for example, in such a way that a molding in the spout (3) is poured out when the web (80) is poured. If the indentation forms an opening that narrows sufficiently towards the outside, the form fit cannot be closed again with simple means.
  • FIGS. 7 to 9 show further exemplary embodiments of indicators positively anchored in the spout 30, the positive locking of which is released when the closure unit is opened for the first time.
  • the form closure can no longer be closed when these embodiments are closed again, because its shape makes it irreversible, but because the webs are so weakly designed that they do not have sufficient inherent rigidity to be able to be positioned with sufficient accuracy when they are closed again .
  • the probability that they are deformed when they are opened for the first time very large, so that it is not possible to re-establish the positive connection.
  • Figure 7 shows such an embodiment as a view.
  • the indicators 8.1 and 8.2 are molded parts on the closure part 2, which are cast into groove-shaped molded parts of the spout 30.
  • the indicators 8.1 and 8.2 are pulled out of the grooves when the closure unit is opened for the first time. They are shaped so thin that they do not have sufficient inherent stability to be able to be reinserted into the indentations when they are closed again.
  • FIGS. 8 and 9 show, in a section that is essentially parallel to the plane of the pouring opening, further embodiments of such indicators.
  • FIG. 8 shows such an indicator 8.3 in a groove in the spout 30, which is arranged essentially on the plane of symmetry (6 in FIG. 1) of the closure unit.
  • Figure 9 shows two indicators 8.4 and 8.5 in corresponding grooves in the spout 30, which are arranged symmetrically to the plane of symmetry.
  • corresponding indicators can be provided in varying numbers over the entire outer surface of the spout 30.
  • the formations do not necessarily have to be narrow and long as shown, they can have a wide variety of shapes, but must have such a small dimension in at least one direction that their inherent stability is reduced in such a way that they cannot be reinserted into the corresponding formations when they are closed again.
  • FIGS. 10 and 11 show a further embodiment of the closure unit according to the invention with an indicator.
  • This indicator 9 consists essentially only of a predetermined breaking point in a correspondingly shaped closure part 2, the predetermined breaking point in the case of the slight deformation which occurs during the Opening the closure part 2 is unavoidable, breaks.
  • the predetermined breaking point 9 is attached to a point on the closure part 2 which has no part in the seal between the closure part 2 and the pouring part 3.
  • the closure function of the closure unit is not impaired by the break that occurs when it is opened for the first time and thus serves as an indicator.
  • FIG. 10 shows such a breaking point 9 intact, that is to say the new condition of the closure unit;
  • FIG. 11 shows the closure unit in the re-closed state with a broken break point.
  • the predetermined breaking point on the closure part 2 is produced, for example, as shown, by a slot 90 in the area 22 of the closure part 2, which overlaps the pouring part 3.
  • the slot 90 is closed against the edge of the closure part with a narrow bridge 91, which represents the actual predetermined breaking point.

Abstract

The sealing cap according to the invention consists of a closure part (2) and a pouring part (3). It has at least two regions which each consist of a thermoplastic material, the materials differing in at least one property. In this case, the closure part has an indicator (8) which belongs to the region made of one material and extends over the outer surface of the pouring part (3) which belongs to the region of another material at least in the region of the indicator. The indicator (8) has an intended tearing point (85) or a non-reconstitutable connection with the pouring part (3), and is moved, during the first opening of the sealing cap, from a first state into a visibly different further state. <IMAGE>

Description

Die Erfindung liegt auf dem Gebiete der Verpackungsindustrie und betrifft eine Verschlusseinheit gemäss dem Oberbegriff des unabhängigen Patentanspruches.The invention is in the field of the packaging industry and relates to a closure unit according to the preamble of the independent claim.

An Gebinden für Flüssigkeiten wie beispielsweise Metalldosen oder Behälter aus beschichtetem Karton werden für eine wiederverschliessbare Öffnung und für ein bequemes Ausgiessen oft Verschlusseinheiten, vorzugsweise aus Kunststoff, bestehend aus einem Ausgussteil mit einer Ausgussöffnung und einem die Ausgussöffnung des Ausgussteils verschliessenden Verschlussteil eingesetzt, die in einer Öffnung des Gebindes angebracht werden. Die beiden Schweizer Patentanmeldungen 2739/91-2 und 2740/91-9 derselben Anmelderin beschreiben derartige Verschlusseinheiten. Die beschriebenen Verschlusseinheiten werden nach einem Mehrmaterialien-Spritzgussverfahren gegossen und bestehen aus mindestens zwei sich in mindestens einer Eigenschaft unterscheidenden Materialien. Weitere Verschlusseinheiten werden in den Schriften WO 90/14287 und WO 84/00531 offenbart, wobei die Verschlusseinheit nach WO 90/14287 aus zwei verschiedenen Materialien besteht.On containers for liquids such as metal cans or containers made of coated cardboard, for a reclosable opening and for convenient pouring, closure units, preferably made of plastic, consisting of a pouring part with a pouring opening and a closing part closing the pouring opening of the pouring part, are used in an opening of the container. The two Swiss patent applications 2739 / 91-2 and 2740 / 91-9 by the same applicant describe such closure units. The closure units described are cast using a multi-material injection molding process and consist of at least two materials which differ in at least one property. Further closure units are disclosed in WO 90/14287 and WO 84/00531, the closure unit according to WO 90/14287 consisting of two different materials.

Bei verpackten Gütern, insbesondere aber bei Lebensmitteln, möchte der Käufer in der Regel wissen, ob die Verpackung des Produktes schon einmal geöffnet wurde oder ob sie noch intakt ist. Bei den meisten Verpackungen wird dies erreicht, indem mit der mechanischen Funktion des Verschlusses ein Aufreiss-Element kombiniert ist.For packaged goods, but especially for food, the buyer usually wants to know whether the packaging of the product has already been opened or whether it is still intact. With most packaging this is achieved by combining a tear-open element with the mechanical function of the closure.

Ein Nachteil der bekannten Lösungen besteht darin, dass nach dem ersten Öffnen die Verschlussqualität oft beeinträchtigt ist, weil beispielsweise ein Teil der Verschlussfunktion zerstört oder die Verankerung des Verschlussteils nicht mehr in vollem Umfang erhalten ist. Ein weiterer Nachteil ist meist der, dass zur Herstellung des Aufreisselementes ein zusätzlicher Herstellungs- oder Montageschritt notwendig wird.A disadvantage of the known solutions is that after the first opening, the closure quality is often impaired because, for example, part of the closure function is destroyed or the anchoring of the closure part is no longer fully preserved. Another disadvantage is usually that an additional manufacturing or assembly step is necessary to manufacture the tear-open element.

Es ist also Aufgabe der Erfindung, eine Verschlusseinheit zu schaffen, an der eine sichtbare, irreversible Anzeige (Indikator) aufzeigt, ob die Verschlusseinheit neu (noch nie geöffnet) oder wiederverschlossen ist. Die Veränderung des Indikators beim ersten Öffnen soll auf die Schliess- und Dichtfunktion der Verschlusseinheit keine Auswirkung haben. Dieser Indikator soll ohne zusätzliche Massnahme bei der Herstellung der Verschlusseinheit, insbesondere ohne zusätzlichen Herstellungs- und/oder Montageschritt quasi im selben Ar-beitsgang zusammen en mit der Verschlusseinheit hergestellt werden können.It is therefore an object of the invention to provide a closure unit on which a visible, irreversible display (indicator) shows whether the closure unit is new (never opened) or reclosed. The change in the indicator when it is opened for the first time should have no effect on the closing and sealing function of the closure unit. This indicator should be able to be produced together with the closure unit without additional measures during the manufacture of the closure unit, in particular without an additional manufacture and / or assembly step, quasi in the same operation.

Diese Aufgabe wird gelöst durch die Verschlusseinheiten gemäss dem kennzeichnenden Teil des unabhängigen Patentanspruches.This object is achieved by the closure units according to the characterizing part of the independent patent claim.

Die erfindungsgemässe Verschlusseinheit weist mindestens zwei Bereiche auf, die aus je einem Material bestehen, wobei sich die Materialien der verschiedenen Bereiche in mindestens einer Eigenschaft unterscheiden. Mindestens einer der Bereiche erstreckt sich sowohl im Verschlussteil als auch im Ausgussteil der Verschlusseinheit. Als Indikator besitzt beispielsweise einer der Bereiche einen Teilbereich, der sich auf der Aussenseite der Verschlusseinheit vom Verschlussteil auf den Ausgussteil erstreckt und dort verankert ist. Dabei besteht der als Indikator dienende Teilbereich aus dem einen Material und die Aussenseite des Ausgussteiles, auf der der Indikator liegt aus dem anderen Material. Die Festigkeit des Teilbereiches und diejenige seiner Verankerung sind derart aufeinander abgestimmt, dass beim ersten Öffnen entweder die Verankerung gelöst oder der Teilbereich durchbrochen wird. Sind die beiden Materialien farblich voneinander verschieden, ist sehr leicht sichtbar, ob die Verschlusseinheit neu oder wiederverschlossen ist. Voraussetzung dafür, dass die Verschlussqualität durch diese erste Öffnung nicht beeinflusst wird, ist, dass der als Indikator dienende Teilbereich nicht in die Schliess- und Dichtfunktion der Verschlusseinheit miteinbezogen ist.The closure unit according to the invention has at least two areas which each consist of one material, the materials of the different areas differing in at least one property. At least one of the areas extends both in the closure part and in the pouring part of the closure unit. As an indicator, for example, one of the areas has a partial area that is located on the outside of the closure unit extends from the closure part to the pouring part and is anchored there. The partial area serving as an indicator consists of one material and the outside of the pouring part, on which the indicator lies, is made of the other material. The strength of the partial area and that of its anchoring are coordinated with one another in such a way that the first time they are opened, either the anchoring is released or the partial area is broken. If the two materials are different in color, it is very easy to see whether the closure unit is new or reclosed. A prerequisite for the fact that the closure quality is not influenced by this first opening is that the partial area serving as an indicator is not included in the closing and sealing function of the closure unit.

Die erfindungsgemässe Verschlusseinheit wird in einem Arbeitsgang mit dem Verfahren des Multi-Materialien-Spritzgusses hergestellt. Nur mit einem derartigen Verfahren ist es möglich, in einem Arbeitsgang die Verschlusseinheit in geschlossenem Zustand mit einem Indikator in intaktem Zustand herzustellen. Das Multi-Materialien-Spritzgussverfahren beruht darauf, dass in eine Giessform mit einem ersten Material ein Vorspritzling gegossen wird, dass dann die Giessform wenigstens teilweise ersetzt oder vom Vor-spritzling weg bewegt wird und dass dann mit dem zweiten Material die Verschlusseinheit gegossen wird, wobei der Vorspritzling teilweise als Giessform dient und dadurch wenigstens teilweise vom zweiten Material umgossen wird. Damit entstehen ineinander gegossene Bereiche zweier Materialien, wobei die Berührungsflächen je nach Giessparametern und Materialpaarung fester oder weniger fest aneinander haften. Auf diese Art ist es insbesondere möglich, in einem Arbeitsschritt Formschlussmittel in formschlüssigem Zustand zu gies-sen. Selbstverständlich ist das Mehrmaterialien-Spritzgussverfahren nicht auf zwei Materialien beschränkt, es können auch drei oder mehr Materialien nacheinander über- und/oder umeinander gegossen werden.The closure unit according to the invention is produced in one operation using the method of multi-material injection molding. Only with such a method is it possible to produce the closure unit in the closed state with an indicator in the intact state in one operation. The multi-material injection molding process is based on the fact that a pre-molded part is cast into a mold with a first material, that the mold is then at least partially replaced or moved away from the pre-molded part and that the closure unit is then cast with the second material, whereby the pre-molded part partially serves as a casting mold and is thereby at least partially encapsulated by the second material. This creates areas of two materials cast into one another, the contact surfaces adhering to one another more firmly or less firmly, depending on the casting parameters and material pairing. In this way, it is possible in particular to cast form-locking means in a form-fitting state in one work step. Of course, the multi-material injection molding process is not limited to two materials, three or more materials can also be molded one above the other and / or around one another.

Im folgenden sollen nun einige Ausführungsformen der erfindungsgemässen Verschlusseinheit detailliert beschrieben werden. Der Beschreibung dienen auch die folgenden Figuren. Dabei zeigen:

Figur 1
eine beispielhafte Ausführungsform der erfindungsgemässen Verschlusseinheit mit Indikator als Ansicht.
Figur 2
die Verschlusseinheit gemäss Figur 1 im Schnitt senkrecht zur Ebene der Ausgussöffnung;
Figur 3
eine weitere Ausführungsform eines Indikators, als Detail im Schnitt;
Figuren 4 und 5
weitere Ausführungsformen von Indikatoren mit Verankerungen mit Zusatzfunktionen, ebenfalls im Schnitt;
Figur 6
eine beispielhafte Ausführungsform eines Indikators mit lösbarer Verankerung, im Schnitt;
Figuren 7, 8 und 9
weitere Ausführungsformen des Indikators mit lösbarer Verankerung, als Ansicht (Figur 7) und in Schnitten parallel zur Ausgussöffnung (Figuren 8 und 9);
Figuren 10 und 11
eine beispielhafte Ausführungsform des Indikators ohne Verankerung im Neuzustand (Figur 10) und in wiederverschlossenem Zustand (Figur 11).
Some embodiments of the closure unit according to the invention will now be described in detail below. The following figures also serve for the description. Show:
Figure 1
an exemplary embodiment of the closure unit according to the invention with indicator as a view.
Figure 2
1 in section perpendicular to the plane of the pouring opening;
Figure 3
a further embodiment of an indicator, as a detail in section;
Figures 4 and 5
further embodiments of indicators with anchors with additional functions, also in section;
Figure 6
an exemplary embodiment of an indicator with releasable anchoring, in section;
Figures 7, 8 and 9
further embodiments of the indicator with releasable anchoring, as a view (FIG. 7) and in sections parallel to the pouring opening (FIGS. 8 and 9);
Figures 10 and 11
an exemplary embodiment of the indicator without anchoring in the new state (Figure 10) and in the reclosed state (Figure 11).

Figur 1 zeigt eine beispielhafte Ausführungsform der erfindungsgemässen Verschlusseinheit 1. Sie besteht im wesentlichen, wie bereits erwähnt, aus einem Verschlussteil 2 und einem Ausgussteil 3, die beispielsweise mit einem Scharnier 5 miteinander verbunden sind. Der Ausgussteil 3 weist einen im wesentlichen röhrenförmigen Ausguss 30 auf, dessen eine Öffnung (Ausgussöffnung) im verschlossenen Zustand vom Verschlussteil 2 überdeckt ist, und der im Bereiche der anderen Öffnung einen Sockel 31 trägt der zur Befestigung an einem Gebinde dient. Man erkennt auch einen Indikator 8, der im wesentlichen aus einem Steg 80 und einer, hier beispielsweise gabelförmig ausgebildeten Verankerung 81 besteht. Der Steg 80 erstreckt sich vom Verschlussteil 2 über die äussere Oberfläche des Ausgusses 30. FIG. 1 shows an exemplary embodiment of the closure unit 1 according to the invention. As already mentioned, it essentially consists of a closure part 2 and a pouring part 3, which are connected to one another for example with a hinge 5. The pouring part 3 has an essentially tubular pouring spout 30, one opening (pouring opening) of which is covered by the closing part 2 in the closed state, and which carries a base 31 in the region of the other opening which is used for fastening to a container. An indicator 8 can also be seen, which essentially consists of a web 80 and an anchoring 81, here, for example, in the form of a fork. The web 80 extends from the closure part 2 over the outer surface of the spout 30.

Figur 2 zeigt dieselbe Verschlusseinheit wie Figur 1, entlang der in der Figur 1 mit 6 bezeichneten Linie geschnitten. Man erkennt hier eine Wand 7 eines Gebindes, die im Bereiche der Gebindeöffnung über dem Sockel 31 liegt und beispielsweise durch Verschweissung mit diesem verbunden ist. Mit A ist die Ebene bezeichnet, in der sich der Sockel 31 und die gegen das Gebinde gewandte Öffnung des Ausgusses 30 erstrecken. Mit B ist eine Fläche bezeichnet, in der die vom Verschlussteil 2 überdeckte Ausgussöffnung 10 liegt. Die Schwenkachse 51 des Scharniers 5 zur schwenkbaren Verbindung von Verschlussteil 2 und Ausgussteil 3 liegt etwa in der Ebene B. Man erkennt ferner den Verschlussteil 2, der den Ausguss 30 in einem Bereich 14 überdeckt und damit in geschlossenem Zustand über die Ebene B hinabreicht. An der Aussenseite des Ausgusses 30 ist in diesem Überdeckungsbereich eine Nocke 15 vorgesehen, die gegen den Verschlussteil 2 hin vorsteht und als Verschlusssicherung dient. Der Verschlussteil 2 weist in demselben Bereich eine ange-formte Öffnungslippe 21 auf, die zum Öffnen der Verschlusseinheit dient. An diese Lippe 21 angeformt ist der Indikator 8, bestehend im wesentlichen aus Steg 80 und Verankerung 81. Die Verankerung 81 reicht zwischen die Gebindewand 7 und den Sockel 31 und wird dort beispielsweise durch Verschweissung festgehalten. FIG. 2 shows the same closure unit as FIG. 1, cut along the line labeled 6 in FIG. 1. A wall 7 of a container can be seen here, which lies in the region of the container opening above the base 31 and is connected to it, for example, by welding. With A is the level in which the base 31 and the opening of the spout 30 extending against the container extend. B denotes a surface in which the pouring opening 10 covered by the closure part 2 lies. The pivot axis 51 of the hinge 5 for the pivotable connection of the closure part 2 and the pouring part 3 lies approximately in the plane B. Furthermore, the closure part 2 can be seen, which covers the spout 30 in a region 14 and thus extends over the plane B in the closed state. On the outside of the spout 30, a cam 15 is provided in this overlap area, which protrudes toward the closure part 2 and serves as a locking device. The closure part 2 has a molded-on opening lip 21 in the same area, which is used to open the closure unit. The indicator 8, consisting essentially of the web 80 and the anchoring 81, is molded onto this lip 21. The anchoring 81 extends between the container wall 7 and the base 31 and is held there, for example, by welding.

Zwischen dem Steg 80, der eine im wesentlichen stetig verlaufende äussere Oberfläche aufweist, und dem Ausguss 30, ist an den Ausguss angeformt eine weitere Nocke 18 vorgesehen, die bewirkt, dass der Steg an dieser Stelle einen kleineren Querschnitt hat, derart, dass diese Stelle als Sollbruchstelle 85 dienen kann. Die Schwächung ist derart auszulegen, dass die Sollbruchstelle schwächer ist als die Verbindung der Verankerung 81 mit der Gebindewand 7 und/oder dem Sockel 31.Between the web 80, which has a substantially continuously extending outer surface, and the spout 30, a further cam 18 is provided integrally with the spout, which causes the web to have a smaller cross section at this point, such that this point can serve as a predetermined breaking point 85. The weakening is to be designed in such a way that the predetermined breaking point is weaker than the connection of the anchoring 81 to the container wall 7 and / or the base 31.

Zum Öffnen wird der Verschlussteil 2 an der Lippe 21 ergriffen und nach oben über die Nocke 15 und die Ausgussöffnung 10 hoch gezogen. Dabei ergibt sich eine Bewegung, die man als Schälen bezeichnen kann, denn der Verschlussteil 2 wird vom Ausgussteil 3 gelöst und bei gleichzeitiger, leichter Verformung wie eine Orangenschale abgezogen. Dabei reisst die Sollbruchstelle 85.To open the closure part 2 is gripped on the lip 21 and pulled up over the cam 15 and the pouring opening 10. This results in a movement that can be referred to as peeling, because the closure part 2 is detached from the pouring part 3 and is pulled off like an orange peel with simultaneous, slight deformation. The predetermined breaking point 85 tears.

Beim Schliessen des Verschlussteiles 2 wird dieser ebenfalls leicht verformt, bevor er in die geschlossene Stellung übergeht. Die Verformung ist auch notwendig, weil die Lippe 21 über die Nocke 15 gezogen werden muss, so dass sie darauf einrastet. Da der Steg 80 nicht oder nur leicht am Ausguss 30 haftet, ist an der wiederverschlossenen Verschlusseinheit leicht sichtbar, dass er zerrissen ist; dies insbesondere dann, wenn das Material des Steges 80 sich farblich unterscheidet vom Material des Ausgusses 30.When the closure part 2 is closed, it is also slightly deformed before it changes to the closed position. The deformation is also necessary because the lip 21 must be pulled over the cam 15 so that it clicks into place. Since the web 80 does not adhere or only sticks to the spout 30, it can easily be seen on the reclosed closure unit that it is torn; this is particularly the case if the material of the web 80 differs in color from the material of the spout 30.

Die Form der Nocke 18, die da wo sie am weitesten vorsteht, gerundet ist und an die Rundung anschliessend sich auf der einen Seite steil, auf der anderen flacher aus der Oberfläche des Ausgusses 30 erhebt, ist derart gewählt, weil sie mit einfachen Giesswerkzeugen hergestellt werden kann.The shape of the cam 18, where it protrudes the furthest, is rounded and, following the rounding, rises steeply on one side and rises more flatly on the other from the surface of the spout 30, because it is produced using simple casting tools can be.

Figur 3 zeigt als Detail eines Schnittes analog zum Schnitt der Figur 2 eine weitere Ausführungsform der Sollbruchstelle 85 im Steg 80. In diesem Falle weist die gegen aussen gewandte Oberfläche des Steges 80 eine Kerbe 19 auf, während die Oberfläche des Ausgusses 30 im wesentlichen stetig verläuft. FIG. 3 shows, as a detail of a section similar to the section of FIG. 2, a further embodiment of the predetermined breaking point 85 in the web 80. In this case, the surface of the web 80 facing towards the outside has a notch 19, while the surface of the spout 30 runs essentially continuously .

Der Steg 80 kann irgendwo auf der Aussenoberfläche des Ausgusses 30 verlaufen. Es können auch mehrere derartige Stege angeordnet sein.The web 80 can run anywhere on the outer surface of the spout 30. Several such webs can also be arranged.

Beim Aufreissen bleibt ein Teil des Steges 80 am Verschlussteil 2 hängen, was dessen Funktion aber keineswegs beeinträchtigt. Man kann aber die Sollbruchstelle 85 auch dicht unter der Lippe 21 anbringen, sodass am Verschlussteil 2 nach dem Aufreissen kein Stegteil mehr bleibt.When tearing open, part of the web 80 remains on the closure part 2, but this in no way impairs its function. However, the predetermined breaking point 85 can also be placed just below the lip 21, so that after the tear-open part 2 no web part remains.

Figur 4 zeigt in derselben Darstellungsweise wie Figur 2 eine weitere Aus-führungsform des Indikators 8. Dieser hat wiederum die Form eines Steges 80 mit einer Sollbruchstelle 85 und einer zwischen die Gebindewand 7 und den Sockel 31 reichende Verankerung 81 und ist beispielsweise im Bereiche der Lippe 21 an den Verschlussteil 2 angeformt. Im Verankerungsbereich weist der Steg eine weitere Nocke 82 auf, die dazu dient, die Verschlusseinheit bei ihrer Montage am Gebinde auf diesem zu positionieren, bevor sie beispiels-weise mit diesem verschweisst wird. FIG. 4 shows, in the same representation as FIG. 2, a further embodiment of the indicator 8. This in turn has the shape of a web 80 with a predetermined breaking point 85 and an anchoring 81 that extends between the container wall 7 and the base 31 and is, for example, in the area of the lip 21 integrally formed on the closure part 2. In the anchoring area, the web has a further cam 82, which is used to position the closure unit on the container when it is mounted on it before it is welded to it, for example.

Figur 5 zeigt in gleicher Darstellungsweise wie Figur 4 eine weitere, beispielhafte Ausführungsform des Indikators 8, der auch hier eine der Positionierung der Verschlusseinheit am Gebinde dienende Nocke 82 trägt. Im Unterschied zur Figur 4 ist der Indikator 8 nicht durch eine Verankerung zwischen Gebindewand 7 und Sockel 31 verankert, sondern mittels einer formschlüssigen Verbindung 83 im Ausguss 30 selbst. Die formschlüssige Verbindung 83 besteht im wesentlichen aus einer Einformung im Ausguss, die beim Giessen des zweiten Materials ausgegossen wird. FIG. 5 shows, in the same representation as FIG. 4, a further, exemplary embodiment of the indicator 8, which here also bears a cam 82 which serves to position the closure unit on the container. In contrast to FIG. 4, the indicator 8 is not anchored by an anchoring between the container wall 7 and the base 31, but by means of a form-fitting connection 83 in the spout 30 itself. The form-fitting connection 83 exists essentially from an indentation in the spout, which is poured out when the second material is poured.

Figur 6 zeigt, wiederum in gleicher Darstellungsweise wie Figur 4, eine weitre beispielhafte Ausführungsform des Indikators 8. Dieser besteht wiederum aus einem an den Verschlussteil 2, beispielsweise im Bereiche der Lippe 21 angeformten Steg 80 mit einer formschlüssigen Verankerung 84 im Ausguss 30. Im Unterschied zu den bis anhin beschriebenen Ausführungsformen besitzt dieser Indikator keine Sollbruchstelle. Dafür ist aber die Verankerung 84 derart ausgelegt, dass der Kraftaufwand zu ihrer Lösung gering ist. Beim ersten Öffnen der Verschlusseinheit wird der Formschluss zwischen dem Steg und dem Ausguss 30 gelöst. Der Formschluss ist derart irreversibel ausgestaltet, dass er, wenigstens mit einfachen Mitteln, nicht wieder hergestellt werden kann. FIG. 6 shows, again in the same representation as FIG. 4, a further exemplary embodiment of the indicator 8. This in turn consists of a web 80 molded onto the closure part 2, for example in the area of the lip 21, with a form-fitting anchoring 84 in the spout 30. In contrast to the embodiments described so far, this indicator has no predetermined breaking point. For this, however, the anchoring 84 is designed in such a way that the effort required to solve it is low. When the closure unit is opened for the first time, the positive connection between the web and the spout 30 is released. The form fit is so irreversible that it cannot be restored, at least with simple means.

Der Formschluss ist hier beispielsweise derart ausgebildet, dass eine Einformung im Ausguss (3) beim Giessen des Steges (80) ausgegossen wird. Bildet die Einformung eine sich gegen aussen genügend verengende Öffnung, ist der Formschluss mit einfachen Mitteln nicht wieder schliessbar.The form fit is designed here, for example, in such a way that a molding in the spout (3) is poured out when the web (80) is poured. If the indentation forms an opening that narrows sufficiently towards the outside, the form fit cannot be closed again with simple means.

Figuren 7 bis 9 zeigen weitere beispielhafte Ausführungsformen von formschlüssig im Ausguss 30 verankerten Indikatoren, deren Formschluss beim ersten Öffnen der Verschlusseinheit gelöst wird. Der Formschluss kann beim Wiederverschliessen dieser Ausführungsformen nicht eigentlich deshalb nicht mehr geschlossen werden, weil seine Form ihn irreversibel macht, sondern deshalb, weil die Stege derart schwach ausgelegt sind, dass sie nicht genügend Eigensteifigkeit besitzen, um beim Wiederverschliessen mit genügender Genauigkeit positioniert werden zu können. Ferner ist die Wahrscheinlichkeit, dass sie beim ersten Öffnen deformiert werden, sehr gross, sodass eine Wiedererstellung des Formschlusses schon deswegen nicht möglich ist. FIGS. 7 to 9 show further exemplary embodiments of indicators positively anchored in the spout 30, the positive locking of which is released when the closure unit is opened for the first time. The form closure can no longer be closed when these embodiments are closed again, because its shape makes it irreversible, but because the webs are so weakly designed that they do not have sufficient inherent rigidity to be able to be positioned with sufficient accuracy when they are closed again . Furthermore, the probability that they are deformed when they are opened for the first time, very large, so that it is not possible to re-establish the positive connection.

Figur 7 zeigt eine derartige Ausführungsform als Ansicht. Die Indikatoren 8.1 und 8.2 sind Anformungen am Verschlussteil 2, die in nutenförmigen Einformungen des Ausgusses 30 eingegossen sind. Die Indikatoren 8.1 und 8.2 werden beim ersten Öffnen der Verschlusseinheit aus den Nuten gezogen. Sie sind derart dünn geformt, dass sie nicht genügend Eigenstabilität besitzen, um beim Wiederverschliessen wieder in den Einformungen eingeführt werden zu können. Figure 7 shows such an embodiment as a view. The indicators 8.1 and 8.2 are molded parts on the closure part 2, which are cast into groove-shaped molded parts of the spout 30. The indicators 8.1 and 8.2 are pulled out of the grooves when the closure unit is opened for the first time. They are shaped so thin that they do not have sufficient inherent stability to be able to be reinserted into the indentations when they are closed again.

Figuren 8 und 9 zeigen in einem Schnitt, der im wesentlichen parallel zur Ebene der Ausgussöffnung gelegt ist, weitere Ausführungsformen derartiger Indikatoren. Figur 8 zeigt einen derartigen Indikator 8.3 in einer Nut im Ausguss 30, die im wesentlichen auf der Symmetrieebene (6 in Figur 1) der Verschlusseinheit angeordnet ist. Figur 9 zeigt zwei Indikatoren 8.4 und 8.5 in entsprechenden Nuten im Ausguss 30, die symmetrisch zur Symmetrieebene angeordnet sind. In derselben Art und Weise können über die ganze Aussenoberfläche des Ausgusses 30 entsprechende Indikatoren in variierender Zahl vorgesehen werden. Die Anformungen müssen nicht unbedingt schmal und lang wie dargestellt sein, sie können verschiedenste Formen aufweisen, müssen aber in mindestens einer Richtung eine derart kleine Abmessung haben, die ihre Eigenstabilität derart reduziert, dass sie beim Wiederverschliessen nicht wieder in die entsprechenden Einformungen eingeführt werden können.FIGS. 8 and 9 show, in a section that is essentially parallel to the plane of the pouring opening, further embodiments of such indicators. FIG. 8 shows such an indicator 8.3 in a groove in the spout 30, which is arranged essentially on the plane of symmetry (6 in FIG. 1) of the closure unit. Figure 9 shows two indicators 8.4 and 8.5 in corresponding grooves in the spout 30, which are arranged symmetrically to the plane of symmetry. In the same way, corresponding indicators can be provided in varying numbers over the entire outer surface of the spout 30. The formations do not necessarily have to be narrow and long as shown, they can have a wide variety of shapes, but must have such a small dimension in at least one direction that their inherent stability is reduced in such a way that they cannot be reinserted into the corresponding formations when they are closed again.

Figuren 10 und 11 zeigen eine weitere Ausführungsform der erfindungsgemässen Verschlusseinheit mit Indikator. Dieser Indikator 9 besteht im wesentlichen nur aus einer Sollbruchstelle in einem entsprechend geformten Verschlussteil 2, wobei die Sollbruchstelle bei der leichten Deformation, die beim Öffnen des Verschlussteiles 2 unumgänglich ist, bricht. Die Sollbruchstelle 9 ist an einer Stelle des Verschlussteiles 2 angebracht, die an der Dichtung zwischen Verschlussteil 2 und Ausgussteil 3 nicht teil hat. Dadurch wird die Verschlussfunktion der Verschlusseinheit durch den Bruch, der beim ersten Öffnen entsteht und dadurch als Indikator dient, nicht beeinträchtigt. FIGS. 10 and 11 show a further embodiment of the closure unit according to the invention with an indicator. This indicator 9 consists essentially only of a predetermined breaking point in a correspondingly shaped closure part 2, the predetermined breaking point in the case of the slight deformation which occurs during the Opening the closure part 2 is unavoidable, breaks. The predetermined breaking point 9 is attached to a point on the closure part 2 which has no part in the seal between the closure part 2 and the pouring part 3. As a result, the closure function of the closure unit is not impaired by the break that occurs when it is opened for the first time and thus serves as an indicator.

Figur 10 zeigt eine derartige Bruchstelle 9 intakt, also den Neuzustand der Verschlusseinheit; Figur 11 zeigt die Verschlusseinheit im wiederverschlossenen Zustand mit gebrochener Bruchstelle. FIG. 10 shows such a breaking point 9 intact, that is to say the new condition of the closure unit; FIG. 11 shows the closure unit in the re-closed state with a broken break point.

Die Sollbruchstelle am Verschlussteil 2 wird beispielsweise, wie dargestellt, erzeugt durch einen Schlitz 90 in dem Bereich 22 des Verschlussteiles 2, der den Ausgussteil 3 überlappt. Der Schlitz 90 ist gegen den Rand des Verschlussteiles mit einer schmalen Brücke 91 geschlossen, die die eigentliche Sollbruchstelle darstellt.The predetermined breaking point on the closure part 2 is produced, for example, as shown, by a slot 90 in the area 22 of the closure part 2, which overlaps the pouring part 3. The slot 90 is closed against the edge of the closure part with a narrow bridge 91, which represents the actual predetermined breaking point.

Auch für diesen Fall gilt, dass bei unterschiedlicher Färbung des Materials des Verschlussteiles 2 und des Ausgusses 30 mindestens im Bereiche des Indikators 9, dessen Zustand (gebrochen oder nicht) sehr gut sichtbar wird.In this case too, if the material of the closure part 2 and the spout 30 is colored differently, at least in the area of the indicator 9, its state (broken or not) becomes very clearly visible.

Claims (14)

  1. Closure unit of thermoplastic material for handling and storing flowable products, which can be mounted on a container, having a pouring part (3) with a substantially tubular spout (30) and a base (31) for fixing to the container, with a closure part (2) closing the pouring part opening and swivellably interconnected pouring part (3) and closure part (2), it having at least two areas made in each case from one material and the different materials differ with regards to at least one property, characterized in that the closure part (2) has an indicator (8, 9), belonging at least to the area of one material, that the indicator (8, 9) extends over the outer surface of the spout (30) belonging to the area of the other material, that the indicator (8) is moulded in or on the other material using a multimaterial injection moulding process and that it is brought in irreversible manner into a second state from a first state on the initial opening of the closure unit.
  2. Closure unit according to claim 1, characterized in that the indicator (8) is a web (80) extending from the closure part (2) to the base (31) and which is fixed with the aid of an anchoring means (81) between the base (31) and the container wall (7) and has a predetermined breaking point.
  3. Closure unit according to claim 1, characterized in that the indicator (8) is a web (8) extending from the closure part (2) to the base (31) and which is fixed to the spout (30) with the aid of irreversible positive engagement means (83) and which has a predetermined breaking point.
  4. Closure unit according to claim 2 or 3, characterized in that the predetermined breaking point (85) is a cross-sectional constriction and is located substantially in the centre of the length of the web (80) or directly at the closure part (2).
  5. Closure unit according to claim 2 or 3, characterized in that the predetermined breaking point (85) is a cross-sectional constriction and is obtained by a cam (15) in the spout wall or a notch (19) in the web (80).
  6. Closure unit according to one of the claims 2 to 5, characterized in that the indicator (8) additionally has a positioning cam (82), which is used for positioning the closure unit on the container.
  7. Closure unit according to claim 1, characterized in that the indicator (8, 8.1 ... 8.5) is fixed to the pouring part (3) by connecting means, which are detachable, but not reconnectable.
  8. Closure unit according to claim 3 or 7, characterized in that the indicator (8) has a web (80) continuing in a shaping in the wall of the spout (30).
  9. Closure unit according to claim 8, characterized in that the shaping is an outwardly constricting opening.
  10. Closure unit according to claim 7, characterized in that the indicator (8.1, 8.2, 8.3, 8.4, 8.5) is a moulding on the closure part (2) moulded in a groove on the outer surface of the pouring part (3) and has such an inherent rigidity that following the initial opening it cannot be reinserted in the groove.
  11. Closure unit according to one of the claims 2 to 10, characterized in that the closure part (2) has an opening lip (21) and that the indicator or indicators (8) are shaped on said lip.
  12. Closure unit according to one of the claims 2 to 11, characterized in that the indicator is located on the plane of symmetry (6) of the closure unit perpendicular to the pouring opening or the indicators are arranged symmetrically to said planes.
  13. Closure unit according to claim 1, characterized in that the indicator (9) comprises a predetermined breaking point (9), which is located in an area of the closure part (2), which in the closed state of the closure unit overlaps the spout (30).
  14. Closure unit according to claim 13, characterized in that the predetermined breaking point comprises a slot (90) and a narrow bridge (91) terminating the slot (90) against the edge of the closure part (2).
EP92810956A 1991-12-12 1992-12-04 Sealing cap Expired - Lifetime EP0548010B1 (en)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
CH369391 1991-12-12
CH369491 1991-12-12
CH3695/91 1991-12-12
CH3694/91 1991-12-12
CH369591 1991-12-12
CH3693/91 1991-12-12
CH3588/91 1991-12-12
CH368891 1991-12-12

Publications (2)

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EP0548010A1 EP0548010A1 (en) 1993-06-23
EP0548010B1 true EP0548010B1 (en) 1996-04-24

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Family Applications (1)

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EP92810956A Expired - Lifetime EP0548010B1 (en) 1991-12-12 1992-12-04 Sealing cap

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US (1) US5372284A (en)
EP (1) EP0548010B1 (en)
AT (1) ATE137185T1 (en)
DE (1) DE59206114D1 (en)
DK (1) DK0548010T3 (en)
ES (1) ES2090578T3 (en)
GR (1) GR3019882T3 (en)

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FR2647088B1 (en) * 1989-05-17 1991-11-22 Rical Sa POURING ASSEMBLY AND CAPPING CAP WITH SPRING HINGE
US5062542A (en) * 1989-12-13 1991-11-05 City Of Hope Easy-open and reclosable container
US5271519A (en) * 1991-03-05 1993-12-21 Portola Packaging, Inc. One-piece fitment and tethered plug with tamper-evident means
US5201440A (en) * 1991-10-11 1993-04-13 Seaquist Closures, A Division Of Pittway Corporation Closure with tamper-evident tear-off panel unitary with a flow control element
US5197618A (en) * 1991-10-15 1993-03-30 Top Seal, Inc. Tamper-evident fusion bonded pull-tab induction foil lining system for container closures

Also Published As

Publication number Publication date
US5372284A (en) 1994-12-13
DE59206114D1 (en) 1996-05-30
DK0548010T3 (en) 1996-06-24
ES2090578T3 (en) 1996-10-16
GR3019882T3 (en) 1996-08-31
EP0548010A1 (en) 1993-06-23
ATE137185T1 (en) 1996-05-15

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