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EP0596087B1 - Closure - Google Patents

Closure Download PDF

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Publication number
EP0596087B1
EP0596087B1 EP93911726A EP93911726A EP0596087B1 EP 0596087 B1 EP0596087 B1 EP 0596087B1 EP 93911726 A EP93911726 A EP 93911726A EP 93911726 A EP93911726 A EP 93911726A EP 0596087 B1 EP0596087 B1 EP 0596087B1
Authority
EP
European Patent Office
Prior art keywords
coating
closure
pourer
container
closure unit
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
EP93911726A
Other languages
German (de)
French (fr)
Other versions
EP0596087A1 (en
Inventor
Elmar Mock
Marcel Aeschlimann
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
Original Assignee
Tetra Laval Holdings and Finance SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tetra Laval Holdings and Finance SA filed Critical Tetra Laval Holdings and Finance SA
Publication of EP0596087A1 publication Critical patent/EP0596087A1/en
Application granted granted Critical
Publication of EP0596087B1 publication Critical patent/EP0596087B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D5/00Rigid 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
    • B65D5/42Details of containers or of foldable or erectable container blanks
    • B65D5/72Contents-dispensing means
    • B65D5/74Spouts
    • B65D5/746Spouts formed separately from the container
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S215/00Bottles and jars
    • Y10S215/02Coatings and laminations for making of bottle caps

Definitions

  • the invention lies in the field of the packaging industry and relates to a closure unit and a method for its production according to the preambles of the corresponding independent claims.
  • closure units preferably made of plastic, consisting of a pouring part with a pouring opening and a closing part which closes the pouring opening of the pouring part and which is in an opening of the container.
  • a closure unit is disclosed, for example, in the international patent application PCT / CH92 / 00188.
  • closure units consist of a plastic which is said to have cheap properties which are favorable for the manufacture of the closure unit. This is so that the production can be carried out with tools that enable a large output.
  • the aim is to ensure that the closure unit increases the price of the container as little as possible and that the container with the closure unit appears attractive to the user from as many points of view as possible.
  • the goods in the container should be additionally protected against influences from the environment so that they remain durable for a long time.
  • gases such as exhaust gases which are mixed with the ambient air can adversely affect foods in such containers and, for example, oxidize or vitamins contained therein change the taste of such foods.
  • gases such as exhaust gases which are mixed with the ambient air can adversely affect foods in such containers and, for example, oxidize or vitamins contained therein change the taste of such foods.
  • Such a closure unit is disclosed, for example, in the English patent application GB-2'241'225.
  • this film has to be removed or perforated for the first pouring and that afterwards it can no longer fulfill the function originally intended for it. I.e. for example, it is no longer gas-tight or no longer opaque. It can no longer fulfill its function even if a closure part of the closure unit closes the pouring opening again, because when the closure part is closed, the film is not returned to its original state. Seen as a whole, the package as a whole has lost part of its properties as a result of the first opening of the closure unit, as is the case for a package without a closure unit and is also accepted because it seems to be unavoidable here.
  • the invention as characterized in the claims, now solves the problem of creating a closure unit for a container with the original properties of the container, which are used to protect the goods are essential, even after repeated opening of the closure unit, to remain practically undiminished.
  • the invention solves the problem of creating a closure unit for a container which, in the closed state, is substantially more gas-tight and / or radiation-impermeable even when the closure has already been opened.
  • one or more coatings are applied together on the inside of the closure unit, on the outside or on the inside and outside. These coatings adhere to the pouring part and on the closure part and bridge a separation point, mixing the pouring part and the closure part as a thin membrane or at least partially filling them.
  • the coating is only interrupted at this comparatively very small separation point and is not restored after the closure.
  • the advantages achieved by the invention can be seen in particular in the fact that the requirements placed on the container for protecting the goods are retained even if further functions are performed with the container for which it is intended.
  • the container performs several functions in relation to the goods to be contained, such as protecting the goods against external influences, handling the goods, storing the goods, etc., then one of these functions will not be impaired if or because you are performing another of the intended functions.
  • each function is retained independently of the other functions or properties.
  • This is quite in contrast to known containers, in which the exercise of one function performs the other functions inevitably affected. For example, handling the goods, such as partially removing them from the known container, has a lasting effect on the protective function of the container.
  • Another advantage of the solution according to the invention is that the application of the coatings can be integrated into the manufacturing process of the closure unit. A finished closure unit with all the desired properties can thus be produced and later attached to a container.
  • the invention further makes it possible to adapt the properties of the container and the closure unit together to the most varied of conditions. It is thus possible to provide a first coating that optimally fulfills a first condition (for example sealing against light or barrier against the exchange of oxygen). However, if this coating is mechanically vulnerable, for example due to granular material in the container, a further coating can be provided which protects the first coating against mechanical damage. A third coating can be provided, which has further supplementary properties, etc.
  • the individual coatings can thus be assigned properties or functions that optimally fulfill them, and the missing properties can be supplemented by additional layers that optimally fulfill these additional properties. This means that many conditions that one would like to place on the container and the closure unit can be optimally fulfilled.
  • properties that are at most reduced, as already mentioned can be at least partially compensated for by other measures. Even if this should not always be possible, the areas that do not fully meet the above-mentioned properties are, according to the invention, vanishingly small against the inner surface of the container.
  • Figure 1 shows a closure unit 1 which is inserted into a container 2 made of cardboard.
  • the closure unit 1 consists of a pouring part 3, which protrudes from a surface 4 of the container 2, and a closure part 5, which is shown here in the open state.
  • the closure part 5 and the pouring part 3 are not releasably connected to one another via a hinge 6.
  • the surface 4 has an opening 7, into which the closure unit 1 is inserted, and in this example the closure unit must be pushed through the opening 7 from the inside of the container before it is attached to the wall 4, for example by an ultrasonic welding.
  • FIG. 2 shows a section through the closure unit 1 from FIG. 1.
  • This shows the pouring part 3, the closure part 5 and a hinge 6.
  • the embodiment shown here also has various details which are not essential to the invention, but which are shown are to show a fully functional closure unit.
  • a detail is, for example, a predetermined breaking point 11, which is destroyed during the first opening and forms the actual separation point between the pouring part 3 and the closing part 5.
  • this closure unit also has sealing surfaces 8 which lie between the pouring part 3 and the closure part 5 where these two parts overlap one another.
  • a foot 9 is also visible here, which is fastened to the pouring part 3 and which forms a surface 10 via which the closure unit 1 can be fastened in the wall 4 (FIG. 1).
  • a first coating 12 can also be seen, which is applied here only in the right half of the closure unit on its inside 13 and which is covered by a further coating 14.
  • An outer coating 19 can also be seen, which extends here both over the closure part 5 and over the pouring part 3.
  • the coating 12, 14 is destroyed in the region of the predetermined breaking point 11, which, shown in FIG. 1, roughly follows line 15.
  • the outer coating 19, however, is torn or interrupted in the area of a point 20.
  • the exemplary construction of the closure unit 1 shown here ensures, however, that the effect of this destruction remains extremely small, because the closure part 5 encloses the pouring part 3 in the area of the sealing surfaces 8 in such a tight manner that the closure unit 1 is thus tightly sealed even without a coating Passage of gas or liquid is.
  • additional baffles which are designated 16 and 17 and form additional corners and surfaces, which, for example, improve the seal.
  • the coating 12, 14 is to improve the closure unit 1 against the diffusion of gas or liquid through its walls, this effect is retained by the intact coating 12, 14 over the entire remaining inner surface 13.
  • the material thickness is at least doubled, which means that the diffusion is also greatly inhibited by the increased material thickness where the coating is damaged.
  • the same effect occurs in the area of the separation point 11 with respect to radiation, diffusion, etc.
  • an internal and external coating is particularly effective, because both act here over a large area and do not have their separation point 11, 20 at the same location, so that one coating covers the separation point of the other coating.
  • Such a closure unit 1 is attached to the container 2 via the foot 9. If this is done by welding, welding must be carried out in an area 18 through the coating, which can destroy it there. By welding, however, the material from which the foot 9 and the wall 4 are made is changed, for example compressed, in this area 18, so that the lost effect of the coating is compensated for by this effect. If this is not the case, it can be glued, for example, so that the coating remains intact. Welding interrupts the coating, while gluing bridges the coating.
  • the coatings 12 can consist of a wide variety of materials. Coatings made from mineral substances are particularly cheap. This creates a glass-like coating that is chemically neutral and can therefore come into contact with a wide variety of substances without reacting. Glass-like coatings are also very suitable to avoid undesired gas exchange. To protect the goods against the influence of radiation or electrical and magnetic fields, coatings made of metallic materials are well suited. Plastic coatings can be provided as a further coating 14, which, for example, offer protection against thermal and mechanical influences. For example, the properties of the metallic coating, which can be relatively vulnerable, can be supplemented by giving them the lack of invulnerability.
  • the coatings can be provided on the inside of the closure unit, ie on the inner surface 13, but also on the outside on the outer surface or at both locations.
  • the coatings have a thickness ranging from a few angstroms to a few tenths of a millimeter, depending on the type of coating and the task it is intended to perform.
  • the closure unit 1 is first produced, for example, by casting in a manner known per se.
  • the closure unit is then provided with the first coating in a further device known per se. This is preferably done with the closure part closed.
  • another coating is applied in the same or in another device.
  • the equipment used depends on the type and material of the coating. If a coating of aluminum, for example, is provided, this is done in a device for evaporating aluminum. Coatings based on silicone oxides, which are relatively hard, can be produced by application in a plasma. This is very advantageous because this process does not have to take place at high temperatures. Finally, plastic coatings can also be easily sprayed on.
  • the coatings can be of a wide variety of types, and since the production or application of the coating, as shown above, depends heavily on the type of coating, the possibilities that are available are not conclusively listed here. Nevertheless, these fall under the invention.

Landscapes

  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Closures For Containers (AREA)
  • Packages (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Cartons (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Clamps And Clips (AREA)
  • External Artificial Organs (AREA)
  • Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
  • Tubes (AREA)
  • Formation And Processing Of Food Products (AREA)
  • Specific Sealing Or Ventilating Devices For Doors And Windows (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Abstract

PCT No. PCT/CH93/00128 Sec. 371 Date Jan. 18, 1994 Sec. 102(e) Date Jan. 18, 1994 PCT Filed May 19, 1993 PCT Pub. No. WO93/24376 PCT Pub. Date Dec. 9, 1993.In a thermoplastic closure unit for a container (1) for the handling and storage of flowable products comprising a substantially tubular pouring part (3) and a closure part (5) sealing the opening of the pouring part, a coating (12,19) is applied to the pouring part and the closure part for protecting the product. Such coatings can be applied to the inside, to the outside or to both sides and can e.g. be provided for protecting the product against the action of oxygen.

Description

Die Erfindung liegt auf dem Gebiete der Verpackungsindustrie und betrifft eine Verschlusseinheit und ein Verfahren zu dessen Herstellung gemäss den Oberbegriffen der entsprechenden unabhängigen Patentansprüche.The invention lies in the field of the packaging industry and relates to a closure unit and a method for its production according to the preambles of the corresponding independent claims.

An Gebinden für Flüssigkeiten wie beispielsweise Metalldosen oder Behälter aus beschichtetem Karton werden für eine wiederverschliessbare Oeffnung 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 Oeffnung des Gebindes angebracht werden. In der Internationalen Patentanmeldung PCT/CH92/00188 ist beispielsweise eine derartige Verschlusseinheit offenbart.For 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, are often used, consisting of a pouring part with a pouring opening and a closing part which closes the pouring opening of the pouring part and which is in an opening of the container. Such a closure unit is disclosed, for example, in the international patent application PCT / CH92 / 00188.

Solche Verschlusseinheiten bestehen aus einem Kunststoff, der billig und für die Herstellung der Verschlusseinheit günstige Eigenschaften haben soll. Dies, damit die Herstellung mit Werkzeugen erfolgen kann, die einen grossen Ausstoss ermöglichen. Damit soll erreicht werden, dass die Verschlusseinheit den Preis des Gebindes nur möglichst wenig erhöht und dass damit das Gebinde mit der Verschlusseinheit für den Benützer aus möglichst vielen Gesichtspunkten gesehen attraktiv erscheint. Nun kann es aber vorkommen, dass das Gut in dem Gebinde zusätzlich gegen Einflüsse aus der Umgebung geschützt werden soll, damit es längere Zeit haltbar bleibt. Solche Einflüsse, die das Gut ungünstig verändern können, sind beispielsweise die Feuchtigkeit der Umgebung, auch der Umgebungsluft, und das Licht oder Strahlungen anderer Art. Ebenso können Gase wie Abgase, die mit der Umgebungsluft gemischt sind, Lebensmittel in solchen Gebinden ungünstig beeinflussen und beispielsweise darin enthaltene Vitamine oxydieren oder den Geschmack solcher Lebensmittel verändern. Aus diesen Gründen kann es wünschbar sein, solche Gebinde mit Schichten auszurüsten, die Gase und/oder Licht nicht durchlassen. In der englischen Patentanmeldung GB-2'241'225 ist beispielsweise eine derartige Verschlusseinheit offenbart.Such closure units consist of a plastic which is said to have cheap properties which are favorable for the manufacture of the closure unit. This is so that the production can be carried out with tools that enable a large output. The aim is to ensure that the closure unit increases the price of the container as little as possible and that the container with the closure unit appears attractive to the user from as many points of view as possible. Now it can happen, however, that the goods in the container should be additionally protected against influences from the environment so that they remain durable for a long time. Such influences that The humidity of the environment, including the ambient air, and the light or other types of radiation can be adversely changed, for example. Likewise, gases such as exhaust gases which are mixed with the ambient air can adversely affect foods in such containers and, for example, oxidize or vitamins contained therein change the taste of such foods. For these reasons, it may be desirable to provide such containers with layers that do not let gases and / or light through. Such a closure unit is disclosed, for example, in the English patent application GB-2'241'225.

Nun müssen Anforderungen, die an das Gebinde allgemein gestellt werden, auch durch die Verschlusseinheit erfüllt werden. In diesem Sinne wurde bisher so vorgegangen, dass man entweder die Oeffnung im Gebinde oder aber die Oeffnung in der Verschlusseinheit durch eine Folie abgedeckt hat, die beim erstmaligen Ausgiessen oder Entnehmen des Gutes zerstört werden musste.Now requirements that are generally placed on the container must also be met by the closure unit. In this sense, the previous procedure was to cover either the opening in the container or the opening in the closure unit with a film, which had to be destroyed when the goods were poured out or removed for the first time.

Der Nachteil dieser Lösung ist der, dass diese Folie, zum erstmaligen Ausgiessen entfernt oder durchlöchert werden muss, und dass sie nachher die ursprünglich ihr zugedachte Funktion nicht mehr erfüllen kann. D.h. sie ist beispielsweise nicht mehr gasdicht oder nicht mehr lichtundurchlässig. Sie kann ihre Funktion auch dann nicht mehr erfüllen, wenn ein Verschlussteil der Verschlusseinheit die Ausgussöffnung wieder fest schliesst, denn beim Schliessen des Verschlussteiles wird die Folie nicht wieder in ihren ursprünglichen Zustand übergeführt. Damit hat das Gebinde als Ganzes gesehen durch die erstmalige Oeffnung der Verschlusseinheit einen Teil seiner Eigenschaften eingebüsst, wie das für ein Gebinde ohne Verschlusseinheit zutrifft und auch akzeptiert ist, weil es hier eben unvermeidlich zu sein scheint.The disadvantage of this solution is that this film has to be removed or perforated for the first pouring and that afterwards it can no longer fulfill the function originally intended for it. I.e. for example, it is no longer gas-tight or no longer opaque. It can no longer fulfill its function even if a closure part of the closure unit closes the pouring opening again, because when the closure part is closed, the film is not returned to its original state. Seen as a whole, the package as a whole has lost part of its properties as a result of the first opening of the closure unit, as is the case for a package without a closure unit and is also accepted because it seems to be unavoidable here.

Die Erfindung, wie sie in den Patentansprüchen gekennzeichnet ist, löst nun die Aufgabe, eine Verschlusseinheit für ein Gebinde zu schaffen, mit der die ursprünglichen Eigenschaften des Gebindes, die für den Schutz des Gutes wesentlich sind, auch nach mehrmaligem Oeffnen der Verschlusseinheit, praktisch unvermindert erhalten bleiben. Insbesondere löst die Erfindung die Aufgabe, eine Verschlusseinheit für ein Gebinde zu schaffen, die in geschlossenem Zustand auch dann wesentlich weitergehend gasdicht und/oder strahlungsundurchlässig ist, wenn der Verschluss bereits einmal geöffnet wurde.The invention, as characterized in the claims, now solves the problem of creating a closure unit for a container with the original properties of the container, which are used to protect the goods are essential, even after repeated opening of the closure unit, to remain practically undiminished. In particular, the invention solves the problem of creating a closure unit for a container which, in the closed state, is substantially more gas-tight and / or radiation-impermeable even when the closure has already been opened.

Dies wird gemäss der Erfindung dadurch erreicht, dass bei der Herstellung der Verschlusseinheit in einem weiteren Schritt, eine oder mehrere Beschichtungen auf der Innenseite der Verschlusseinheit, auf dessen Aussenseite oder auf Innen- und Aussenseite zusammen aufgebracht werden. Diese Beschichtungen haften auf dem Ausgussteil und auf dem Verschlussteil und überbrükken eine Trennstelle Mischen dem Ausgussteil und den Verschlussteil als dünne Membran oder füllen sie mindestens teilweise aus. Beim erstmaligen Oeffnen des Verschlussteiles wird die Beschichtung nur an dieser vergleichsweise sehr kleinen Trennstelle unterbrochen und nach dem Schliessen nicht Wiederhergestellt. Durch eine gezielte konstruktive Ausbildung der Verschlusseinheit an dieser Trennstelle kann aber dafür gesorgt werden, dass die geforderten Eigenschaften wie beispielsweise Dichtheit gegen Gas und/oder Strahlung trotzdem weitestgehend erhalten bleiben.This is achieved according to the invention in that in a further step in the manufacture of the closure unit, one or more coatings are applied together on the inside of the closure unit, on the outside or on the inside and outside. These coatings adhere to the pouring part and on the closure part and bridge a separation point, mixing the pouring part and the closure part as a thin membrane or at least partially filling them. When the closure part is opened for the first time, the coating is only interrupted at this comparatively very small separation point and is not restored after the closure. Through a targeted constructive design of the closure unit at this separation point, however, it can be ensured that the required properties, such as tightness against gas and / or radiation, are largely retained.

Die durch die Erfindung erreichten Vorteile sind insbesondere darin zu sehen, dass die an das Gebinde zum Schutze des Gutes gestellten Anforderungen auch dann erhalten bleiben, wenn weitere Funktionen mit dem Gebinde ausgeübt werden, für die es vorgesehen ist. Mit anderen Worten, wenn das Gebinde in bezug auf das Gut, das es enthalten soll, mehrere Funktionen wie z.B. Schutz des Gutes gegen äussere Einflüsse, Handhabung des Gutes, Lagerung des Gutes usw. ausübt, so wird eine dieser Funktionen auch nicht beeinträchtigt, wenn oder weil man eine andere der vorgesehenen Funktionen ausübt. Damit bleibt jede Funktion unabhängig von den anderen Funktionen oder Eigenschaften für sich erhalten. Dies ganz im Gegensatz zu bekannten Gebinden, bei denen die Ausübung der einen Funktion die anderen Funktionen zwangsläufig beeinträchtigt. Z.B. beeinträchtigt eine Handhabung des Gutes, wie dessen teilweise Entnahme aus dem bekannten Gebinde nachfolgend die Schutzfunktion des Gebindes nachhaltig. Beim Gebinde mit erfindungsgemässer Verschlusseinheit ist dies nicht der Fall. Ein weiterer Vorteil der erfindungsgemässen Lösung besteht darin, dass das Aufbringen der Beschichtungen in den Herstellungsprozess der Verschlusseinheit integrierbar ist. Damit kann eine fertige mit allen gewünschten Eigenschaften versehene Verschlusseinheit hergestellt und später an einem Gebinde angebracht werden. Durch die Erfindung ist es weiter möglich, die Eigenschaften des Gebindes und der Verschlusseinheit zusammen an die verschiedensten Bedingungen anzupassen. Es ist damit möglich, eine erste Beschichtung vorzusehen, die eine erste Bedingung (z.B. Dichtung gegen Licht oder Sperre gegen den Austausch von Sauerstoff) optimal erfüllt. Ist aber diese Beschichtung mechanisch verletzbar, beispielsweise durch körniges Gut im Gebinde, so kann eine weitere Beschichtung vorgesehen werden, die die erste Beschichtung gegen mechanische Verletzung schützt. Eine dritte Beschichtung kann vorgesehen werden, die weitere ergänzende Eigenschaften aufweist usw. Den einzelnen Beschichtungen können damit Eigenschaften oder Funktionen zugewiesen werden, die sie optimal erfüllen und die fehlenden Eigenschaften können durch zusätzliche Schichten ergänzt werden, die diese ergänzenden Eigenschaften wieder optimal erfüllen. Damit lassen sich sehr viele Bedingungen, die man an das Gebinde und die Verschlusseinheit stellen möchte eben optimal erfüllen. An der genannten Trennstelle zwischen Ausguss und Verschlussteil allenfalls verminderte Eigenschaften lassen sich, wie bereits erwähnt, mindestens teilweise durch andere Massnahmen ausgleichen. Auch wenn das nicht immer möglich sein sollte, so sind die Flächenanteile, die die genannten Eigenschaften allenfalls nicht vollständig erfüllen, gemäss der Erfindung verschwindend klein gegen die Innenfläche des Gebindes.The advantages achieved by the invention can be seen in particular in the fact that the requirements placed on the container for protecting the goods are retained even if further functions are performed with the container for which it is intended. In other words, if the container performs several functions in relation to the goods to be contained, such as protecting the goods against external influences, handling the goods, storing the goods, etc., then one of these functions will not be impaired if or because you are performing another of the intended functions. This means that each function is retained independently of the other functions or properties. This is quite in contrast to known containers, in which the exercise of one function performs the other functions inevitably affected. For example, handling the goods, such as partially removing them from the known container, has a lasting effect on the protective function of the container. This is not the case with the container with the closure unit according to the invention. Another advantage of the solution according to the invention is that the application of the coatings can be integrated into the manufacturing process of the closure unit. A finished closure unit with all the desired properties can thus be produced and later attached to a container. The invention further makes it possible to adapt the properties of the container and the closure unit together to the most varied of conditions. It is thus possible to provide a first coating that optimally fulfills a first condition (for example sealing against light or barrier against the exchange of oxygen). However, if this coating is mechanically vulnerable, for example due to granular material in the container, a further coating can be provided which protects the first coating against mechanical damage. A third coating can be provided, which has further supplementary properties, etc. The individual coatings can thus be assigned properties or functions that optimally fulfill them, and the missing properties can be supplemented by additional layers that optimally fulfill these additional properties. This means that many conditions that one would like to place on the container and the closure unit can be optimally fulfilled. At the mentioned separation point between the pouring spout and the closure part, properties that are at most reduced, as already mentioned, can be at least partially compensated for by other measures. Even if this should not always be possible, the areas that do not fully meet the above-mentioned properties are, according to the invention, vanishingly small against the inner surface of the container.

Im folgenden wird die Erfindung anhand von lediglich einen Ausführungsweg darstellenden Zeichnungen näher erläutert. Es zeigt

  • Figur 1 ein Gebinde mit einer Verschlusseinheit in perspektivischer Darstellung und
  • Figur 2 eine Verschlusseinheit im Schnitt.
The invention is explained in more detail below with the aid of drawings which illustrate only one embodiment. It shows
  • Figure 1 is a container with a closure unit in perspective and
  • Figure 2 shows a closure unit in section.

Figur 1 zeigt eine Verschlusseinheit 1, die in ein Gebinde 2 aus Karton eingesetzt ist. Die Verschlusseinheit 1 besteht aus einem Ausgussteil 3, der aus einer Fläche 4 des Gebindes 2 hervorsteht, und aus einem Verschlussteil 5, der hier in geöffnetem Zustand dargestellt ist. Der Verschlussteil 5 und der Ausgussteil 3 sind über ein Scharnier 6 nicht lösbar miteinander verbunden. Die Fläche 4 weist eine Oeffnung 7 auf, in die die Verschlusseinheit 1 eingesetzt ist und zwar muss in diesem hier gezeigten Beispiel die Verschlusseinheit vom Gebindeinneren her durch die Oeffnung 7 hindurchgestossen werden, bevor sie an der Wand 4 beispielsweise durch eine Ultraschallschweissung befestigt wird.Figure 1 shows a closure unit 1 which is inserted into a container 2 made of cardboard. The closure unit 1 consists of a pouring part 3, which protrudes from a surface 4 of the container 2, and a closure part 5, which is shown here in the open state. The closure part 5 and the pouring part 3 are not releasably connected to one another via a hinge 6. The surface 4 has an opening 7, into which the closure unit 1 is inserted, and in this example the closure unit must be pushed through the opening 7 from the inside of the container before it is attached to the wall 4, for example by an ultrasonic welding.

Figur 2 zeigt einen Schnitt durch die Verschlusseinheit 1 aus der Figur 1. Darin erkennt man den Ausgussteil 3, den Verschlussteil 5 und ein Scharnier 6. Die hier gezeigte Ausführung weist zusätzlich verschiedene Details auf, die für die Erfindung nicht wesentlich sind, die aber dargestellt sind um eine voll funktionsfähige Verschlusseinheit zu zeigen. Ein solches Detail ist beispielsweise eine Sollbruchstelle 11, die beim ersten Oeffnen zerstört wird und die eigentliche Trennstelle zwischen Ausgussteil 3 und Verschlussteil 5 bildet. Insbesondere weist aber diese Verschlusseinheit auch Dichtflächen 8 auf, die dort zwischen dem Ausgussteil 3 und dem Verschlussteil 5 liegen, wo diese beiden Teile einander überdecken. Zudem ist hier noch ein Fuss 9 sichtbar, der am Ausgussteil 3 befestigt ist, und der eine Fläche 10 bildet, über die die Verschlusseinheit 1 in der Wand 4 (Fig. 1) befestigt sein kann. Als Befestigungsart kann beispielsweise Kleben oder Schweissen vorgesehen sein. Man erkennt ferner eine erste Beschichtung 12, die hier nur in der rechten Hälfte der Verschlusseinheit auf dessen Innenseite 13 aufgebracht ist und die von einer weiteren Beschichtung 14 überdeckt ist. Man erkennt ebenfalls eine Aussenbeschichtung 19, die sich hier sowohl über den Verschlussteil 5 wie auch über den Ausgussteil 3 erstreckt.FIG. 2 shows a section through the closure unit 1 from FIG. 1. This shows the pouring part 3, the closure part 5 and a hinge 6. The embodiment shown here also has various details which are not essential to the invention, but which are shown are to show a fully functional closure unit. Such a detail is, for example, a predetermined breaking point 11, which is destroyed during the first opening and forms the actual separation point between the pouring part 3 and the closing part 5. In particular, however, this closure unit also has sealing surfaces 8 which lie between the pouring part 3 and the closure part 5 where these two parts overlap one another. In addition, a foot 9 is also visible here, which is fastened to the pouring part 3 and which forms a surface 10 via which the closure unit 1 can be fastened in the wall 4 (FIG. 1). As a type of attachment For example, gluing or welding can be provided. A first coating 12 can also be seen, which is applied here only in the right half of the closure unit on its inside 13 and which is covered by a further coating 14. An outer coating 19 can also be seen, which extends here both over the closure part 5 and over the pouring part 3.

Beim erstmaligen Oeffnen des Verschlussteiles 5 wird die Beschichtung 12, 14 im Bereiche der Sollbruchstelle 11, welche in Figur 1 dargestellt etwa der Linie 15 folgt, zerstört. Die Aussenbeschichtung 19 dagegen wird im Bereiche einer Stelle 20 zerrissen oder unterbrochen. Durch die hier gezeigte beispielhafte konstruktive Ausbildung der Verschlusseinheit 1 wird aber dafür gesorgt, dass die Wirkung dieser Zerstörung äusserst klein bleibt, denn der Verschlussteil 5 umschliesst den Ausgussteil 3 im Bereiche der Dichtflächen 8 derart eng, dass dadurch die Verschlusseinheit 1 auch ohne Beschichtung dicht gegen Durchtritt von Gas oder Flüssigkeit ist. Dies wird unterstützt durch weitere Schikanen die mit 16 und 17 bezeichnet sind und zusätzliche Ecken und Flächen bilden, die beispielsweise die Abdichtung verbessern. Wenn die Beschichtung 12, 14 die Verschlusseinheit 1 gegen das Diffundieren von Gas oder Flüssigkeit durch dessen Wände verbessern soll, so bleibt diese Wirkung durch die intakte Beschichtung 12, 14 über die ganze übrige Innenfläche 13 erhalten. Im Bereiche der Sollbruchstelle 11, ist aber die Materialdicke mindestens verdoppelt, womit das Diffundieren eben durch die erhöhte Materialdicke auch dort stark gehemmt ist, wo die Beschichtung verletzt wird. Dieselbe Wirkung ergibt sich im Bereiche der Trennstelle 11 auch in bezug auf Strahlung, Diffusion usw. Wenn die Beschichtungen insbesondere dazu vorgesehen sind, die Diffusion von Gasen oder den Durchtritt von Strahlen zu stoppen, so ist eine Innen- und Aussenbeschichtung besonders wirksam, denn beide wirken hier grossflächig und haben ihre Trennstelle 11, 20 nicht am gleichen Ort, so dass die eine Beschichtung die Trennstelle der anderen Beschichtung abdeckt.When the closure part 5 is opened for the first time, the coating 12, 14 is destroyed in the region of the predetermined breaking point 11, which, shown in FIG. 1, roughly follows line 15. The outer coating 19, however, is torn or interrupted in the area of a point 20. The exemplary construction of the closure unit 1 shown here ensures, however, that the effect of this destruction remains extremely small, because the closure part 5 encloses the pouring part 3 in the area of the sealing surfaces 8 in such a tight manner that the closure unit 1 is thus tightly sealed even without a coating Passage of gas or liquid is. This is supported by additional baffles, which are designated 16 and 17 and form additional corners and surfaces, which, for example, improve the seal. If the coating 12, 14 is to improve the closure unit 1 against the diffusion of gas or liquid through its walls, this effect is retained by the intact coating 12, 14 over the entire remaining inner surface 13. In the area of the predetermined breaking point 11, however, the material thickness is at least doubled, which means that the diffusion is also greatly inhibited by the increased material thickness where the coating is damaged. The same effect occurs in the area of the separation point 11 with respect to radiation, diffusion, etc. If the coatings are intended in particular to stop the diffusion of gases or the passage of rays, an internal and external coating is particularly effective, because both act here over a large area and do not have their separation point 11, 20 at the same location, so that one coating covers the separation point of the other coating.

Eine solche Verschlusseinheit 1 wird über den Fuss 9 am Gebinde 2 befestigt. Geschieht dies durch Schweissen, so muss in einem Bereiche 18 durch die Beschichtung hindurch geschweisst werden, was diese dort zerstören kann. Durch das Schweissen wird aber in diesem Bereiche 18 das Material aus dem der Fuss 9 und die Wand 4 bestehen, verändert, beispielsweise verdichtet, so dass durch diesen Effekt die verlorene Wirkung der Beschichtung ausgeglichen wird. Ist dies nicht der Fall, so kann beispielweise geklebt werden, so dass die Beschichtung intakt bleibt. Schweissen unterbricht die Beschichtung, Kleben dagegen überbrückt die Beschichtung.Such a closure unit 1 is attached to the container 2 via the foot 9. If this is done by welding, welding must be carried out in an area 18 through the coating, which can destroy it there. By welding, however, the material from which the foot 9 and the wall 4 are made is changed, for example compressed, in this area 18, so that the lost effect of the coating is compensated for by this effect. If this is not the case, it can be glued, for example, so that the coating remains intact. Welding interrupts the coating, while gluing bridges the coating.

Die Beschichtungen 12 können aus verschiedensten Materialien bestehen. Besonders günstig sind Beschichtungen aus mineralischen Stoffen. Damit entsteht eine glasartige Beschichtung, die chemisch neutral ist und demzufolge zu den verschiedensten Stoffen in Kontakt treten darf ohne zu reagieren. Glasartige Beschichtungen eigenen sich auch sehr gut um unerwünschten Gasaustausch zu vermeiden. Um das Gut gegen den Einfluss von Strahlung oder von elektrischen und magnetischen Feldern zu schützen sind Beschichtungen aus metallischen Stoffen gut geeignet. Als weitere Beschichtung 14 können Kunststoffbeschichtungen vorgesehen werden, die beispielsweise einen Schutz gegen thermische und mechanische Einflüsse bieten. So können beispielsweise die Eigenschaften der metallischen Beschichtung, die relativ verletzlich sein kann, ergänzt werden, indem man ihnen auch noch die fehlende Unverletzlichkeit verleiht.The coatings 12 can consist of a wide variety of materials. Coatings made from mineral substances are particularly cheap. This creates a glass-like coating that is chemically neutral and can therefore come into contact with a wide variety of substances without reacting. Glass-like coatings are also very suitable to avoid undesired gas exchange. To protect the goods against the influence of radiation or electrical and magnetic fields, coatings made of metallic materials are well suited. Plastic coatings can be provided as a further coating 14, which, for example, offer protection against thermal and mechanical influences. For example, the properties of the metallic coating, which can be relatively vulnerable, can be supplemented by giving them the lack of invulnerability.

Die Beschichtungen können an der Verschlusseinheit innen, also an der Innenfläche 13, aber auch aussen an der Aussenfläche oder an beiden Stellen vorgesehen werden. Die Beschichtungen haben eine Dicke, die von einigen Angström bis zu einigen Zehntelsmillimetern reichen, je nach Art der Beschichtung und je Aufgabe, die sie erfüllen soll.The coatings can be provided on the inside of the closure unit, ie on the inner surface 13, but also on the outside on the outer surface or at both locations. The coatings have a thickness ranging from a few angstroms to a few tenths of a millimeter, depending on the type of coating and the task it is intended to perform.

Bei dem erfindungsgemässen Verfahren zur Herstellung einer Verschlusseinheit wird zuerst die Verschlusseinheit 1 beispielsweise durch Giessen in an sich bekannter Weise hergestellt. Anschliessend wird die Verschlusseinheit in einer weiteren an sich bekannten Einrichtung mit der ersten Beschichtung versehen. Dies geschieht vorzugsweise mit geschlossenem Verschlussteil. Dann wird in derselben oder auch in einer anderen Einrichtung eine weitere Beschichtung aufgebracht. Diese verwendeten Einrichtungen richten sich nach der Art und dem Material der Beschichtung. Ist eine Beschichtung beispielsweise aus Aluminium vorgesehen, so geschieht dies in einer Einrichtung zum Aufdampfen von Aluminium. Beschichtungen auf der Basis von Silikonoxiden, welche relativ hart sind, können durch Auftragen in einem Plasma erzeugt werden. Dies ist sehr vorteilhaft, weil dieser Vorgang nicht bei hohen Temperaturen ablaufen muss. Kunststoffbeschichtungen schliesslich lassen sich auch ganz einfach aufspritzen.In the method according to the invention for producing a closure unit, the closure unit 1 is first produced, for example, by casting in a manner known per se. The closure unit is then provided with the first coating in a further device known per se. This is preferably done with the closure part closed. Then another coating is applied in the same or in another device. The equipment used depends on the type and material of the coating. If a coating of aluminum, for example, is provided, this is done in a device for evaporating aluminum. Coatings based on silicone oxides, which are relatively hard, can be produced by application in a plasma. This is very advantageous because this process does not have to take place at high temperatures. Finally, plastic coatings can also be easily sprayed on.

Da die Beschichtungen verschiedenster Art sein können, und da die Herstellung oder das Aufbringen der Beschichtung wie oben gezeigt, stark von der Art der Beschichtung abhängt, sind die sich bietenden Möglichkeiten hier nicht abschliessend aufgeführt. Dennoch fallen diese unter die Erfindung.Since the coatings can be of a wide variety of types, and since the production or application of the coating, as shown above, depends heavily on the type of coating, the possibilities that are available are not conclusively listed here. Nevertheless, these fall under the invention.

Claims (14)

  1. Closure made from a thermoplastic material for a container (1) for the handling and storage of a flowable product, comprising a substantially tubular pourer (3) and a closure part (5) closing the pourer opening, characterized by a coating (12) applied to the closure during the production of the latter and which extends over the pourer and the closure part, which bridges a separating point (11) between the pourer and the closure part and protects the product against undesired influences.
  2. Closure according to claim 1, characterized by a further coating (14), which covers the first coating (12).
  3. Closure according to claim 1, characterized in that the coating comprises a mineral material.
  4. Closure according to claim 1, characterized in that the coating comprises a metallic material.
  5. Closure according to claim 2, characterized in that the further coating is of plastic.
  6. Closure according to claim 1, characterized in that the material thickness in the vicinity of the separating point (11) is increased.
  7. Closure unit according to claim 1, characterized in that sealing surfaces are associated with the separating point (11).
  8. Closure according to claim 2, characterized in that the coating (12) and the further coating (14) have mutually supplementing characteristics.
  9. Closure according to claim 1, characterized in that coatings (12, 19) are provided on the inside and the outside.
  10. Process for producing a closure (1) of thermoplastic material for a container (2) for storing flowable product, comprising a substantially tubular pourer (3) and a closure part (5) closing the pourer opening, characterized in that the pourer and the closure part are produced in a first step by moulding and that in a second step the pourer and the closure part are coated together and in the closed position with at least one coating (12).
  11. Process according to claim 10, characterized in that in a third step a further coating (14) is applied, which has additional properties compared with the first coating (12).
  12. Process according to claim 10, characterized in that the coating is applied by evaporation coating.
  13. Process according to claim 10, characterized in that coating takes place by spraying.
  14. Process according to claim 10 or 11, characterized in that coating takes place with the aid of a plasma.
EP93911726A 1992-06-01 1993-05-19 Closure Expired - Lifetime EP0596087B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH01754/92A CH687610A5 (en) 1992-06-01 1992-06-01 Shutter unit.
CH1754/92 1992-06-01
PCT/CH1993/000128 WO1993024376A1 (en) 1992-06-01 1993-05-19 Closure

Publications (2)

Publication Number Publication Date
EP0596087A1 EP0596087A1 (en) 1994-05-11
EP0596087B1 true EP0596087B1 (en) 1996-10-09

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP93911726A Expired - Lifetime EP0596087B1 (en) 1992-06-01 1993-05-19 Closure

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US (1) US5509585A (en)
EP (1) EP0596087B1 (en)
JP (1) JPH07500554A (en)
AT (1) ATE143887T1 (en)
AU (1) AU666381B2 (en)
CA (1) CA2113423C (en)
CH (1) CH687610A5 (en)
DE (1) DE59304110D1 (en)
ES (1) ES2095648T3 (en)
WO (1) WO1993024376A1 (en)

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US5975414A (en) * 1998-11-25 1999-11-02 Tetra Laval Holdings & Finance, Sa Carton with a gable top having a triangular face with a fitment thereon and a blank for the same
NZ551956A (en) * 2004-06-11 2010-08-27 Alcan Packaging Capsules Seals made of a multi-layered material for sealing means, particularly a sealing capsule
US20080110918A1 (en) * 2006-11-15 2008-05-15 Lee Herbert K Paperboard wipes carton
ES2533073T3 (en) * 2009-04-09 2015-04-07 Closure Systems International, Inc. Pouring neck with evidence of violation
JP5486753B2 (en) * 2009-11-30 2014-05-07 日本テトラパック株式会社 Packaging container manufacturing method, spout stopper and packaging container
MX2011010313A (en) * 2011-09-30 2013-04-01 Jose Rodrigo Oliva Salinas Monolithic cap for cardboard containers.
WO2014126010A1 (en) * 2013-02-14 2014-08-21 東洋製罐株式会社 Pouring tool exhibiting excellent slip properties for fluid substance
JP5807692B2 (en) * 2014-02-27 2015-11-10 東洋製罐株式会社 Liquid molded plastic molding
US12304702B2 (en) * 2020-04-09 2025-05-20 Tetra Laval Holdings & Finance S.A. Lid assembly for a container, container having a lid assembly and method of coupling a lid assembly to a spout
JP2024535253A (en) * 2021-09-30 2024-09-30 テトラ ラバル ホールディングス アンド ファイナンス エス エイ Opening device for a package, mold for molding the opening device for a package, and package having the opening device
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Also Published As

Publication number Publication date
CA2113423A1 (en) 1993-12-09
CA2113423C (en) 1998-07-28
EP0596087A1 (en) 1994-05-11
CH687610A5 (en) 1997-01-15
ES2095648T3 (en) 1997-02-16
AU4259093A (en) 1993-12-30
ATE143887T1 (en) 1996-10-15
JPH07500554A (en) 1995-01-19
DE59304110D1 (en) 1996-11-14
US5509585A (en) 1996-04-23
WO1993024376A1 (en) 1993-12-09
AU666381B2 (en) 1996-02-08

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