EP0236556A2 - Liquid package and method of producing the same - Google Patents

Liquid package and method of producing the same Download PDF

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Publication number
EP0236556A2
EP0236556A2 EP86115910A EP86115910A EP0236556A2 EP 0236556 A2 EP0236556 A2 EP 0236556A2 EP 86115910 A EP86115910 A EP 86115910A EP 86115910 A EP86115910 A EP 86115910A EP 0236556 A2 EP0236556 A2 EP 0236556A2
Authority
EP
European Patent Office
Prior art keywords
cover strip
cover
hole
punched
opening device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP86115910A
Other languages
German (de)
French (fr)
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EP0236556B1 (en
EP0236556A3 (en
Inventor
Hans Dr. Rausing
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 Pak Finance and Trading SA
Tetra Alfa Holdings 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 Pak Finance and Trading SA, Tetra Alfa Holdings SA filed Critical Tetra Pak Finance and Trading SA
Priority to AT86115910T priority Critical patent/ATE66193T1/en
Publication of EP0236556A2 publication Critical patent/EP0236556A2/en
Publication of EP0236556A3 publication Critical patent/EP0236556A3/en
Application granted granted Critical
Publication of EP0236556B1 publication Critical patent/EP0236556B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • 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
    • B65D5/70—Break-in flaps, or members adapted to be torn-off, to provide pouring openings
    • B65D5/708—Separate tearable flexible elements covering a discharge opening of a container, e.g. adhesive tape

Definitions

  • the invention relates to an eluent pack made of plastic-coated carrier material made of paper or the like, in which the side walls and / or cover and / or base are connected to one another via weld seams and / or fold lines and an opening device is attached in the cover or the side wall, which one has punched hole sealing cross-covering strips.
  • plasticizer packs of this type there are the known cuboid packs used for milk, in which the lid and base are connected to the side walls by fold lines and have double-walled triangular fields connected to the inside of the pack on both sides.
  • Numerous opening device proposals have been published in others and also in these types of plasticizers. These opening devices must be easy to handle for the end user, they must remain liquid-tight until the first opening, even when the pack is more heavily used, and should be resealable as far as possible.
  • the pack manufacturers have developed more or less complex devices, machines and processes to achieve these opening devices.
  • the object of the invention is to provide an eluent pack of the type mentioned at the outset, in which an opening device can also be produced reliably and inexpensively in a high-performance machine (large number of units per unit of time).
  • the cover strip consists of injected plastic and its edge areas cover the edges of the punched hole on both sides.
  • the new superplasticizer package therefore only has a single cover strip which is on both sides of the punched-out hole, i.e. encompasses both the outside and inside edges.
  • surfaces are formed at least on the front edges of this hole, which are freely exposed to the outside without a plastic coating. If these front edges were not covered by plastic, liquid contents could penetrate the open paper web, cause it to swell and destroy the package in the area of the opening device. This was also the reason why known plasticizer packs had both an inside and an outside cover strip. According to the invention, this double protection is achieved more easily.
  • a three-dimensional cover strip is formed which connects to the edges of the punched hole on the outside and inside and thus adheres firmly to the punched hole.
  • a pull tab is integrally molded onto the cover strip.
  • spray technique to form the Ab cover strip
  • any suitable pull tabs can also be provided for the plasticizer pack according to the invention.
  • the pull tab will have to be arranged more towards the edge of the hole on the cover strip, so that when this pull tab is pulled up, the tearing process begins in the area of the hole edge and a larger opening can be exposed by tearing into the opposite side.
  • the pull tab itself can also be provided with a triangular tearing tip, at which tearing begins, so that a larger hole is formed in the cover strip by pulling up the pull tab.
  • the cover strip is a thin film in the region of the punched-out hole and the pull tab is designed in the form of a flat field which protrudes vertically from the cover strip.
  • the conditions of tightness and logical and easy opening ability of the cover strip mentioned at the outset are also ensured if the cover strip is formed using only material as a thin strip, for example with a thickness of 0.3 to 2 mm, preferably 1.5 to 1.5 mm .
  • the cover strip can be made thicker when using a corresponding shape, so that the edges of the punched-out hole on the outside and inside are covered by strong round webs.
  • the pull tab is configured in a substantially flat, upright manner in the manner described, a particularly simple injection mold can be used in which the lower mold half is configured in one piece as well as the upper mold half and the demolding in the direction the pull tab is done. If the pull tab has other parts running parallel to the main surface of the cover strip, the outer shape would in turn have to be divided again. In the case of the above-mentioned inventive measure of the flat-shaped pull tab, it is even possible to save the division of one mold half into two.
  • the invention also relates to a method for producing an eluent pack from plastic-coated carrier material made of paper or the like, in which the side walls and / or cover and / or base are connected to one another via weld seams and / or fold lines and in the cover or the side wall Opening device is attached, which has a cover strip sealingly overlapping a punched-out hole; wherein the flat, coated paper web is drawn off from a supply roll, formed into a tube, filled with flow agent, divided by transverse sealing seams, separated and formed into packages.
  • the invention has for its object to simplify the manufacture of an eluent pack in such a way that, despite high performance (large number of pieces per unit of time), perfectly sealed packs with easy-to-open pouring devices can be produced inexpensively.
  • the method is fiction, solve this task characterized in that the hole for the opening device is punched into the paper web before or after deduction from the supply roll in register with the print and / or the fold line pattern and is injected liquid-tight into the punched-out hole shortly before the flat web is formed in the tube , wherein the edge regions of the cover strip fuse with the plastic coating of both surfaces of the paper web.
  • an opening device with the necessary and favorable conditions of tightness, easy and logical opening ability and inexpensive production of an opening device has been created for the first time by the invention.
  • a hole can be punched using known techniques with high register accuracy with regard to the printing and / or the pattern of the fold lines.
  • This is a paper coated on both sides with plastic web, which has a hole, but this is exactly where you want it, so that it fits well for advertising, opening instructions and for the general picture of the pack.
  • Such a pretreated paper web provided with a hole is now fed to the packaging machine, which is preceded by a spraying system upstream of the tube forming devices.
  • Imprints, edges, fold lines or even the punched hole can adjust the position of the web relative to the spraying machine so precisely that a plastic film can be injected as a cover strip at precisely the right place in the area of the punched hole.
  • the spraying device can be designed in a very simple manner in the manner mentioned above, in particular if the pull tab is designed to protrude vertically from the cover strip.
  • the punched-out hole is closed completely liquid-tight, and the web can then be converted into a tubular shape in the usual way, so that further processing with filling, cross-sealing, separating and shaping the finished package can take place as in conventional machines .
  • the injected cover strip does not interfere with this manufacturing process.
  • a commercially available milk or fruit juice packaging in cuboid form is shown and described here as a plasticiser.
  • the material of this cuboid pack consists of paper thinly coated on both sides with plastic, which forms both the side walls 2 and 3 and the bottom and lid 1, as shown in FIG.
  • the side walls result from the formation of a tube which is closed along the longitudinal sealing seam 4. In the present case, no transverse sealing seam is shown on the lid side. This is located in other wall parts of the pack, which are not shown in the figures.
  • Lid 1 and bottom are designed with folded-over triangular fields 5 which are formed in one piece with the side walls 2, 3 and which are connected to the interior of the packaging.
  • a pouring flap 8 is also shown in FIG. 1, which is intended to facilitate the tearing off of the pouring jet of the liquid filling material.
  • the opening device 7 is created by punching out the hole 6, which is closed by means of the cover strip 10 made of plastic.
  • a pull tab 11 in the form of a flat field protrudes vertically from the cover strip 10, the front attachment edge of which is denoted by l 2 in FIG. 2 being arranged off-center.
  • the pull tab ll on the opening device 7 is located off-center to the hole 6.
  • the edge l2 can, however, also be displaced towards the opposite side, in order in any case to ensure that a larger hole is torn open when the liquid pack is opened.
  • FIG. 2 shows the edge areas l3 of the cover strip l0, which, like double flanges, cover the edges l4 of the hole 6 both on the outside and on the inside.
  • FIG. 2 shows the ring-shaped web l5 of the cover strip l0 connecting the two flange-like edge regions l3 of the cover strip l0, which covers the front edge of the punched hole, which is open to the outside without any plastic coating, in such a way that no liquid, neither from inside from the outside, into which paper can penetrate.
  • FIG. 2 also allows a good idea of an injection mold, not shown, in which the inner or lower mold part is to be thought of as being arranged below the cover 1, while the upper part is to be thought of in one piece above the limit of the material web forming the cover 1.
  • the narrowly created area representing the cover strip 10 would then represent the hollow shape into which the plastic is injected.
  • the shape of the packaging that can be provided with such a new opening device can of course differ from the cuboid shape shown here in the figures.
  • Tubular or box-shaped packs are known, in which a paper web is also first punched and sprayed with the cover strip shortly before the pack is set up or a tube is formed.
  • FIG. 2 also shows two tear lines 16, which in a preferred embodiment can also merge into one another as a circle or oval as an endless single line.
  • the left weakening or tear line 16 is arranged directly next to the tab 11, so that the opening takes place when the pull tab 11 is pulled up.
  • the circular or oval-shaped part of the cover strip l0 has a reclosing edge within the tear lines l6, which is denoted by l7 in FIG. In this way, the part of the opening device 7 which has been torn out can be pushed back into the opening until it rests on the reclosing edge 17 and locked there.
  • An inner cover strip l8 seals the package in a liquid-tight manner despite the pouring edge 8.

Abstract

A fluid pack made of plastics-coated paper in which the side walls (2) and/or the cover (1) are connected together by way of fold edges (9) and provided in the cover (1) is an opening device (7) having a cover strip (10) which sealingly engages over a stamped-out hole (6). So that the opening device (7) can be produced in an operationally reliable and economic fashion even in a high-capacity machine, the cover strip (10) is injected plastics material and the edge regions (13) thereof cover over the edge portions (14) of the stamped-out hole (6) on both inner and outer sides of the hole.

Description

Die Erfindung betrifft eine Fließmittelpackung aus mit Kunststoff beschichtetem Trägermaterial aus Papier oder dergleichen, bei welcher die Seitenwände und/oder Deckel und/oder Boden über Schweißnähte und/oder Faltlinien mit­einander verbunden sind und im Deckel oder der Seitenwand eine Öffnungsvorrichtung angebracht ist, die einen ein ausgestanztes Loch dichtend übergreifenden Abdeckstreifen aufweist.The invention relates to an eluent pack made of plastic-coated carrier material made of paper or the like, in which the side walls and / or cover and / or base are connected to one another via weld seams and / or fold lines and an opening device is attached in the cover or the side wall, which one has punched hole sealing cross-covering strips.

Unter den zahlreichen bekannten Fließmittelpackungen die­ser Art gibt es die für Milch verwendeten, bekannten Qua­derpackungen, bei denen Deckel und Boden über Faltlinien mit den Seitenwänden verbunden sind und beidseitig mit dem Inneren der Packung in Verbindung stehende doppelwandige Dreieckfelder aufweisen. In anderen und auch Fließmittel­packungen dieser Art sind zahlreiche Vorschläge für Öff­nungsvorrichtungen veröffentlicht worden. Diese Öffnungs­vorrichtungen müssen für den Endverbraucher leicht zu hand­haben sein, sie müssen bis zum ersten Öffnen auch bei stärker beanspruchter, gefüllter Packung flüssigkeitsdicht bleiben und sollen möglichst wiederverschließbar sein. Die Packungshersteller haben zur Erreichung dieser Öffnungs­vorrichtungen mehr oder weniger aufwendige Einrichtungen, Maschinen und Verfahren entwickelt.Among the numerous known plasticizer packs of this type there are the known cuboid packs used for milk, in which the lid and base are connected to the side walls by fold lines and have double-walled triangular fields connected to the inside of the pack on both sides. Numerous opening device proposals have been published in others and also in these types of plasticizers. These opening devices must be easy to handle for the end user, they must remain liquid-tight until the first opening, even when the pack is more heavily used, and should be resealable as far as possible. The pack manufacturers have developed more or less complex devices, machines and processes to achieve these opening devices.

So ist es beispielsweise bekannt, in einer Maschine zur Herstellung und Füllung einer Flüssigkeitspackung zur Er­stellung einer Öffnungsvorrichtung ein Loch zu stanzen und dieses beidseitig mit einem Abdeckstreifen zuzuschweißen. Entweder ist einer der Abdeckstreifen als Aufreißstreifen zu verwenden, oder es sind zusätzliche Zuglaschen aufge­siegelt, um den Öffnungsvorgang einzuleiten, d.h. den Ab­deckstreifen über dem Stanzloch der Öffnungsvorrichtung aufzubrechen.For example, it is known to punch a hole in a machine for producing and filling a liquid pack to create an opening device and to weld it on both sides with a cover strip. Either one of the cover strips is to be used as a tear strip, or additional pull tabs are sealed in order to initiate the opening process, ie to break open the cover strip above the punched hole of the opening device.

In der Vergangenheit hat sich gezeigt, daß solche Öffnungs­vorrichtungen zwar die Bedürfnisse des Endverbrauchers er­füllen, bei der Herstellung aber nicht unerhebliche Kosten bereiten, weil entweder aufwendige Packungsmaschinen oder zusätzliche Materialien eingesetzt werden müssen.In the past, it has been shown that such opening devices meet the needs of the end user, but are not inconsiderably expensive to produce because either complex packaging machines or additional materials have to be used.

Aufgabe der Erfindung ist die Schaffung einer Fließmittel­packung der eingangs bezeichneten Art, bei welcher eine Öffnungsvorrichtung auch in einer Hochleistungsmaschine (große Stückzahl pro Zeiteinheit) funktionssicher und preiswert herstellbar ist.The object of the invention is to provide an eluent pack of the type mentioned at the outset, in which an opening device can also be produced reliably and inexpensively in a high-performance machine (large number of units per unit of time).

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Abdeckstreifen aus eingespritztem Kunststoff besteht und seine Randbereiche die Ränder des ausgestanzten Loches beidseitig überdecken. Die neue Fließmittelpackung weist also nur einen einzigen Abdeckstreifen auf, der beidsei­tig des ausgestanzten Loches, d.h. sowohl dessen außensei­tige als auch innenseitige Ränder umgreift. Durch das Ausstanzen des Loches bilden sich wenigstens an den stirn­seitigen Rändern dieses Loches Flächen, die ohne Kunst­stoffbeschichtung frei nach außen stehen. Würden diese stirnseitigen Ränder nicht durch Kunststoff abgedeckt, so könnte flüssiges Füllgut in die offene Papierbahn ein­dringen, diese zum Quellen bringen und die Packung im Be­reich der Öffnungsvorrichtung zerstören. Dies war auch der Grund, weshalb bekannte Fließmittelpackungen sowohl einen innenseitigen als auch einen außenseitigen Abdeckstreifen hatten. Erfindungsgemäß wird diese Doppelsicherung einfacher erreicht.This object is achieved in that the cover strip consists of injected plastic and its edge areas cover the edges of the punched hole on both sides. The new superplasticizer package therefore only has a single cover strip which is on both sides of the punched-out hole, i.e. encompasses both the outside and inside edges. By punching out the hole, surfaces are formed at least on the front edges of this hole, which are freely exposed to the outside without a plastic coating. If these front edges were not covered by plastic, liquid contents could penetrate the open paper web, cause it to swell and destroy the package in the area of the opening device. This was also the reason why known plasticizer packs had both an inside and an outside cover strip. According to the invention, this double protection is achieved more easily.

Durch das Einspritzen des Kunststoffes wird ein drei­dimensional ausgestalteter Abdeckstreifen gebildet, der sich mit den Rändern des ausgestanzten Loches auf der Außen- und Innenseite verbindet und damit fest über dem Stanzloch haftet.By injecting the plastic, a three-dimensional cover strip is formed which connects to the edges of the punched hole on the outside and inside and thus adheres firmly to the punched hole.

Vorteilhaft ist es erfindungsgemäß ferner, wenn eine Zug­lasche einstückig an dem Abdeckstreifen angespritzt ist. Durch die Verwendung der Spritztechnik zur Bildung des Ab­ deckstreifens ist es möglich, eine Zuglasche einstückig anzuspritzen. Es sind bei Öffnungsvorrichtungen von Behäl­tern zahlreiche Zuglaschen, die einstückig mit einem Stop­fen ausgestaltet sind, bekannt. Unter Zuhilfenahme dieser bekannten Spritztechnik und der bekannten Formen können beliebig passende Zuglaschen auch für die Fließmittelpak­kung gemäß der Erfindung vorgesehen werden. Das gleiche gilt für die Anbringstelle im Verhältnis zu dem ausgestanz­ten Loch. Vorzugsweise wird die Zuglasche mehr zum Rand des Loches hin auf dem Abdeckstreifen anzuordnen sein, da­mit beim Hochziehen dieser Zuglasche der Einreißvorgang im Bereich des Lochrandes beginnt und durch Aufreißen in die gegenüberliegende Seite eine größere Öffnung freige­legt werden kann. Man kann die Zuglasche selbst auch mit einer dreieckförmigen Reißspitze versehen, an welcher das Einreißen beginnt, so daß sich ein größeres Loch durch Hochziehen der Zuglasche im Abdeckstreifen bildet.It is also advantageous according to the invention if a pull tab is integrally molded onto the cover strip. By using the spray technique to form the Ab cover strip, it is possible to injection molded a pull tab in one piece. Numerous pull tabs, which are designed in one piece with a stopper, are known for opening devices of containers. With the help of this known spraying technique and the known forms, any suitable pull tabs can also be provided for the plasticizer pack according to the invention. The same applies to the location in relation to the punched hole. Preferably, the pull tab will have to be arranged more towards the edge of the hole on the cover strip, so that when this pull tab is pulled up, the tearing process begins in the area of the hole edge and a larger opening can be exposed by tearing into the opposite side. The pull tab itself can also be provided with a triangular tearing tip, at which tearing begins, so that a larger hole is formed in the cover strip by pulling up the pull tab.

Zweckmäßig ist es gemäß der Erfindung ferner, wenn der Ab­deckstreifen im Bereich des ausgestanzten Loches eine dün­ne Folie ist und die Zuglasche in Gestalt eines senkrecht aus dem Abdeckstreifen hochstehenden flachen Feldes aus­gebildet ist. Die eingangs erwähnten Bedingungen der Dich­tigkeit und logischen sowie leichten Öffnungsfähigkeit des Abdeckstreifens sind auch dann gewährleistet, wenn dieser unter Einsparung von Material lediglich als dünner Streifen ausgebildet ist, beispielsweise mit einer Dicke von 0,3 bis 2 mm, vorzugsweise l bis l,5 mm. In den Randbereichen kann der Abdeckstreifen bei Verwendung einer entsprechen­den Form dicker ausgebildet sein, damit die Ränder des ausgestanzten Loches auf der Außen- und Innenseite von kräftigen Rundstegen überdeckt sind.It is also expedient according to the invention if the cover strip is a thin film in the region of the punched-out hole and the pull tab is designed in the form of a flat field which protrudes vertically from the cover strip. The conditions of tightness and logical and easy opening ability of the cover strip mentioned at the outset are also ensured if the cover strip is formed using only material as a thin strip, for example with a thickness of 0.3 to 2 mm, preferably 1.5 to 1.5 mm . In the edge areas, the cover strip can be made thicker when using a corresponding shape, so that the edges of the punched-out hole on the outside and inside are covered by strong round webs.

Wenn die Zuglasche in der beschriebenen Weise im wesent­lichen flach hochstehend ausgestaltet ist, kann ein beson­ders einfaches Spritzwerkzeug verwendet werden, bei dem die untere Formhälfte ebenso einstückig ausgestaltet ist wie die obere Formhälfte und die Entformung in Richtung der Zuglasche erfolgt. Wenn die Zuglasche andere parallel zur Hauptfläche des Abdeckstreifens verlaufende Teile hat, müßte die Außenform ihrerseits nochmals geteilt werden. Im Falle der vorstehend genannten erfinderischen Maßnahme der flachausgestalteten Zuglasche kann man sogar die Zwei­teilung der einen Spritzwerkzeugformhälfte einsparen.If the pull tab is configured in a substantially flat, upright manner in the manner described, a particularly simple injection mold can be used in which the lower mold half is configured in one piece as well as the upper mold half and the demolding in the direction the pull tab is done. If the pull tab has other parts running parallel to the main surface of the cover strip, the outer shape would in turn have to be divided again. In the case of the above-mentioned inventive measure of the flat-shaped pull tab, it is even possible to save the division of one mold half into two.

Die Erfindung bezieht sich auch auf ein Verfahren zur Her­stellung einer Fließmittelpackung aus mit Kunststoff be­schichtetem Trägermaterial aus Papier oder dergleichen, bei welcher die Seitenwände und/oder Deckel und/oder Boden über Schweißnähte und/oder Faltlinien miteinander verbun­den sind und im Deckel oder der Seitenwand eine Öffnungs­vorrichtung angebracht ist, die einen ein ausgestanztes Loch dichtend übergreifenden Abdeckstreifen aufweist; wo­bei die flachliegende beschichtete Papierbahn von einer Vorratsrolle abgezogen, zu einem Tubus geformt, mit Fließ­mittel gefüllt, durch Quersiegelnähte abgeteilt, verein­zelt und zu Packungen geformt wird.The invention also relates to a method for producing an eluent pack from plastic-coated carrier material made of paper or the like, in which the side walls and / or cover and / or base are connected to one another via weld seams and / or fold lines and in the cover or the side wall Opening device is attached, which has a cover strip sealingly overlapping a punched-out hole; wherein the flat, coated paper web is drawn off from a supply roll, formed into a tube, filled with flow agent, divided by transverse sealing seams, separated and formed into packages.

Solche Verfahren zur Herstellung von Flüssigkeitspackungen mit großer Leistung sind in zahlreichen Varianten bekannt. Beispielsweise können tetraederförmige, quaderförmige oder schlauchförmige Packungen in dieser Weise erstellt werden. Bei der Anbringung der geeigneten Öffnungsvorrichtung er­geben sich aber die vorstehend bereits beschriebenen Schwierigkeiten, die nur durch den Einsatz zusätzlicher Materialien oder komplizierter Herstellungsmaschinen über­wunden werden konnten.Such methods for producing liquid packs with high performance are known in numerous variants. For example, tetrahedral, cuboid or tubular packs can be created in this way. When installing the suitable opening device, however, there are the difficulties already described above, which could only be overcome by using additional materials or complicated manufacturing machines.

Hinsichtlich des Verfahrens liegt der Erfindung die Auf­gabe zugrunde, die Herstellung einer Fließmittelpackung dahingehend zu vereinfachen, daß trotz hoher Leistung (große Stückzahl pro Zeiteinheit) einwandfrei abgedichtete Packungen mit leicht zu öffnenden Ausgießeinrichtungen auf preiswerte Weise produziert werden können.With regard to the method, the invention has for its object to simplify the manufacture of an eluent pack in such a way that, despite high performance (large number of pieces per unit of time), perfectly sealed packs with easy-to-open pouring devices can be produced inexpensively.

Das Verfahren ist zur Lösung dieser Aufgabe erfindungsge­ mäß dadurch gekennzeichnet, daß das Loch für die Öffnungs­vorrichtung registerhaltig zum Aufdruck und/oder dem Falz­linienmuster vor oder nach Abzug von der Vorratsrolle in die Papierbahn eingestanzt wird und kurz vor dem Umformen der flachen Bahn in den Tubus der Abdeckstreifen flüssig­keitsdicht in das ausgestanzte Loch eingespritzt wird, wo­bei die Randbereiche des Abdeckstreifens mit der Kunststoff­beschichtung beider Oberflächen der Papierbahn verschmelzen.The method is fiction, solve this task characterized in that the hole for the opening device is punched into the paper web before or after deduction from the supply roll in register with the print and / or the fold line pattern and is injected liquid-tight into the punched-out hole shortly before the flat web is formed in the tube , wherein the edge regions of the cover strip fuse with the plastic coating of both surfaces of the paper web.

Für den Papierhersteller für derartige Flüssigkeitspackun­gen ist es ein leichtes, in eine beschichtete Papierbahn ein Loch für die Öffnungsvorrichtung einzustanzen, durch die Entfernung des Materials an dieser Stelle bleibt das Aufwickeln auf die Vorratsrolle unproblematisch. Zwar wäre es für den Papierhersteller auch ein leichtes, das Loch für die Öffnungsvorrichtung mit einer entsprechenden Spritzma­schine mit einem Abdeckstreifen auszuspritzen. Dieser trägt aber derart erheblich auf, daß eine derart bearbeitete Pa­pierbahn nicht mehr auf eine Vorratsrolle aufgewickelt wer­den könnte. Andererseits wird bei üblichen Packungsmaschi­nen eine Papierbahn verwendet, die über ihre ganze Fläche flüssigkeitsdicht ist. Es gibt derzeit keine Packungsma­schinen, die in ein zuvor ausgestanztes Loch in einer Pa­pierbahn Kunststoffverschlüsse einspritzen.For the paper manufacturer for such liquid packs, it is easy to punch a hole for the opening device in a coated paper web. Because of the removal of the material at this point, the winding onto the supply roll remains unproblematic. It would also be easy for the paper manufacturer to spray the opening for the opening device with a suitable injection molding machine with a cover strip. However, this applies so considerably that a paper web processed in this way could no longer be wound onto a supply roll. On the other hand, in conventional packaging machines, a paper web is used that is liquid-tight over its entire surface. There are currently no packaging machines that inject plastic closures into a previously punched hole in a paper web.

Erstmals durch die Erfindung ist das Herstellen einer Öff­nungsvorrichtung mit den notwendigen und günstigen Bedin­gungen der Dichtigkeit, leichten und logischen Öffnungs­fähigkeit und preiswerten Herstellung einer Öffnungsvor­richtung geschaffen worden, wobei nach dem erfindungsgemä­ßen Verfahren von einer üblichen von einer Vorratsrolle abgezogenen Papierbahn gearbeitet werden kann. Unabhängig von einer Spritzmaschine und der Herstellungsmaschine der Flüssigkeitspackung kann ein Loch mit bekannten Techniken mit hoher Registerhaltigkeit bezüglich des Aufdruckes und/­oder des Musters der Falzlinien eingestanzt werden. Damit liegt eine beidseitig mit Kunststoff beschichtete Papier­ bahn vor, die zwar ein Loch aufweist, dieses liegt jedoch genau an der gewünschten Stelle, so daß es gut für die Werbung, für Öffnungsanweisungen und für das allgemeine Bild der Packung paßt. Eine solche vorbehandelte, mit einem Loch versehene Papierbahn wird nun der Packungsmaschine zugeführt, welcher vor den Tubusformeinrichtungen eine Spritzanlage vorgeschaltet ist. Aufdrucke, Ränder, Falz­linien oder gar das ausgestanzte Loch können die Lage der Bahn relativ zur Spritzmaschine derart genau einstellen, daß eine Kunststoffolie als Abdeckstreifen an präzise der richtigen Stelle im Bereich des ausgestanzten Loches ein­gespritzt werden kann. Durch das Aufpressen des heißen, flüssigen Kunststoffes auch auf die Ränder um das ausge­stanzte Loch herum werden die dort befindlichen Oberflä­chenschichten sowohl außenseitig als auch innenseitig pla­stifiziert, so daß die Randbereiche des eingespritzten Abdeckstreifens mit der erwähnten Kunststoffbeschichtung verschmelzen. Hierdurch ist eine feste Verankerung und flüssigkeitsdichte Verbindung des Abdeckstreifens mit den das Loch umgebenden Wandungen geschaffen. Außerdem kann die Spritzeinrichtung in der oben erwähnten Weise sehr einfach ausgestaltet sein, insbesondere wenn die Zuglasche senkrecht aus dem Abdeckstreifen hochstehend ausgestaltet ist.The production of an opening device with the necessary and favorable conditions of tightness, easy and logical opening ability and inexpensive production of an opening device has been created for the first time by the invention. Regardless of a spraying machine and the liquid packaging manufacturing machine, a hole can be punched using known techniques with high register accuracy with regard to the printing and / or the pattern of the fold lines. This is a paper coated on both sides with plastic web, which has a hole, but this is exactly where you want it, so that it fits well for advertising, opening instructions and for the general picture of the pack. Such a pretreated paper web provided with a hole is now fed to the packaging machine, which is preceded by a spraying system upstream of the tube forming devices. Imprints, edges, fold lines or even the punched hole can adjust the position of the web relative to the spraying machine so precisely that a plastic film can be injected as a cover strip at precisely the right place in the area of the punched hole. By pressing the hot, liquid plastic onto the edges around the punched hole, the surface layers located there are plasticized both on the outside and on the inside, so that the edge regions of the injected cover strip fuse with the plastic coating mentioned. This creates a firm anchoring and liquid-tight connection of the cover strip with the walls surrounding the hole. In addition, the spraying device can be designed in a very simple manner in the manner mentioned above, in particular if the pull tab is designed to protrude vertically from the cover strip.

Nach Verlassen dieser Spritzmaschine für den Abdeckstrei­fen ist das ausgestanzte Loch vollständig flüssigkeitsdicht verschlossen, und die Bahn kann dann in üblicher Weise in Schlauchform umgestaltet werden, so daß die weitere Ver­arbeitung mit Füllen, Querversiegeln, Vereinzeln und For­men der fertigen Packung erfolgen kann wie bei herkömmli­chen Maschinen. Der eingespritzte Abdeckstreifen stört diesen Herstellungsvorgang nicht.After leaving this spraying machine for the cover strip, the punched-out hole is closed completely liquid-tight, and the web can then be converted into a tubular shape in the usual way, so that further processing with filling, cross-sealing, separating and shaping the finished package can take place as in conventional machines . The injected cover strip does not interfere with this manufacturing process.

Weitere Vorteile, Merkmale und Anwendungsmöglichkeiten der vorliegenden Erfindung ergeben sich aus der folgenden Be­schreibung eines bevorzugten Ausführungsbeispiels in Ver­bindung mit den Zeichnungen. Es zeigen:

  • Figur l perspektivisch eine quaderförmige Flüssigkeitspak­kung mit einer Öffnungsvorrichtung gemäß der Er­findung und
  • Figur 2 eine schematische und abgebrochene Schnittdarstel­lung entlang der Linie II-II in Figur l.
Further advantages, features and possible uses of the present invention result from the following description of a preferred exemplary embodiment in conjunction with the drawings. Show it:
  • Figure l perspective a cuboid liquid pack with an opening device according to the invention and
  • Figure 2 is a schematic and broken sectional view along the line II-II in Figure l.

Als Fließmittelpackung wird hier eine im Handel übliche Milch- oder Fruchtsaftverpackung in Quaderform gezeigt und beschrieben. Das Material dieser Quaderpackung besteht aus beidseitig mit Kunststoff dünn beschichtetem Papier, wel­ches sowohl die Seitenwände 2 und 3 als auch den Boden und Deckel l bildet, wie in Figur l gezeigt ist. Die Seiten­wände entstehen durch Bildung eines Tubus, der längs der Längssiegelnaht 4 verschlossen ist. Im vorliegenden Falle ist auf der Deckelseite keine Quersiegelnaht gezeigt. Die­se befindet sich in anderen Wandteilen der Packung, die in den Figuren nicht dargestellt sind. Deckel l und Boden sind mit umgefalteten, mit den Seitenwänden 2, 3 einstük­kig ausgebildeten Dreieckfeldern 5 ausgestaltet, die mit dem Inneren der Verpackung in Verbindung stehen.A commercially available milk or fruit juice packaging in cuboid form is shown and described here as a plasticiser. The material of this cuboid pack consists of paper thinly coated on both sides with plastic, which forms both the side walls 2 and 3 and the bottom and lid 1, as shown in FIG. The side walls result from the formation of a tube which is closed along the longitudinal sealing seam 4. In the present case, no transverse sealing seam is shown on the lid side. This is located in other wall parts of the pack, which are not shown in the figures. Lid 1 and bottom are designed with folded-over triangular fields 5 which are formed in one piece with the side walls 2, 3 and which are connected to the interior of the packaging.

Für die Erfindung ist eigentlich nur die allgemein mit 7 bezeichnete Öffnungsvorrichtung von Interesse, die im fol­genden genauer beschrieben wird und bei der gezeigten Aus­führungsform im Wandfeld des Deckels l neben der vorderen Faltkante 9 angeordnet ist. In Gießrichtung nach vorn ist in Figur l ferner eine Gießlasche 8 dargestellt, die das Abreißen des Ausgießstrahles des flüssigen Füllgutes er­leichtern soll.Only the opening device, generally designated 7, is of interest for the invention, which is described in more detail below and, in the embodiment shown, is arranged in the wall area of the cover 1 next to the front folded edge 9. In the forward pouring direction, a pouring flap 8 is also shown in FIG. 1, which is intended to facilitate the tearing off of the pouring jet of the liquid filling material.

Die Öffnungsvorrichtung 7 entsteht durch Ausstanzen des Loches 6, das mittels des Abdeckstreifens l0 aus Kunst­stoff verschlossen ist. Aus dem Abdeckstreifen l0 steht senkrecht eine Zuglasche ll in Gestalt eines flachen Fel­des heraus, dessen in Figur 2 mit l2 bezeichnete vordere Ansatzkante außermittig angeordnet ist. Die Zuglasche ll an der Öffnungsvorrichtung 7 befindet sich außermittig zum Loch 6. Die Kante l2 kann aber auch zu der gegenüberliegen­den Seite hin verschoben sein, um in jedem Falle ein Auf­reißen eines größeren Loches beim Öffnen der Flüssigkeits­packung zu gewährleisten.The opening device 7 is created by punching out the hole 6, which is closed by means of the cover strip 10 made of plastic. A pull tab 11 in the form of a flat field protrudes vertically from the cover strip 10, the front attachment edge of which is denoted by l 2 in FIG. 2 being arranged off-center. The pull tab ll on the opening device 7 is located off-center to the hole 6. The edge l2 can, however, also be displaced towards the opposite side, in order in any case to ensure that a larger hole is torn open when the liquid pack is opened.

Besonders aus Figur 2 erkennt man die Randbereiche l3 des Abdeckstreifens l0, die wie Doppelflansche die Ränder l4 des Loches 6 sowohl auf der Außenseite als auch auf der Innenseite überdecken. Man erkennt in Figur 2 auch den ringförmigen, die beiden flanschartigen Randbereiche l3 des Abdeckstreifens l0 verbindenden Steg l5 des Abdeckstrei­fens l0, welcher den stirnseitigen Rand des ausgestanzten Loches, der ohne jede Kunststoffbeschichtung nach außen offen liegt, so abdeckt, daß keinerlei Flüssigkeit, weder von innen noch von außen, in das Papier eindringen kann.In particular, FIG. 2 shows the edge areas l3 of the cover strip l0, which, like double flanges, cover the edges l4 of the hole 6 both on the outside and on the inside. One can also see in FIG. 2 the ring-shaped web l5 of the cover strip l0 connecting the two flange-like edge regions l3 of the cover strip l0, which covers the front edge of the punched hole, which is open to the outside without any plastic coating, in such a way that no liquid, neither from inside from the outside, into which paper can penetrate.

Die Betrachtung der Figur 2 erlaubt auch eine gute Vorstel­lung einer nicht gezeigten Spritzform, bei welcher das in­nere oder Unterformteil unterhalb des Deckels l angeordnet zu denken ist, während das Oberteil einstückig oberhalb der Grenze der den Deckel l bildenden Materialbahn zu den­ken ist. Der den Abdeckstreifen l0 darstellende, eng schaf­fierte Bereich würde dann die Hohlform darstellen, in wel­che der Kunststoff eingespritzt wird. Es versteht sich al­so, daß das Herstellungsverfahren für die Öffnungsvorrich­tung einer beliebigen Fließmittelpackung schnell und preis­wert vonstatten geht, weil außer einer kleinen Menge Kunst­stoff keine weiteren Materialien und zudem eine einfache Herstellungsmaschine verwendet werden können.The consideration of FIG. 2 also allows a good idea of an injection mold, not shown, in which the inner or lower mold part is to be thought of as being arranged below the cover 1, while the upper part is to be thought of in one piece above the limit of the material web forming the cover 1. The narrowly created area representing the cover strip 10 would then represent the hollow shape into which the plastic is injected. It goes without saying that the manufacturing process for the opening device of any superplasticizer package is quick and inexpensive because, apart from a small amount of plastic, no other materials and also a simple manufacturing machine can be used.

Die Form der Verpackungen, die mit einer solchen neuen Öffnungsvorrichtung versehen werden können, kann von der hier in den Figuren gezeigten Quaderform selbstverständlich abweichen. Bekannt sind rohrförmige oder kastenförmige Packungen, bei denen ebenfalls eine Papierbahn erst ge­locht und kurz vor dem Aufstellen der Packung oder Bilden eines Tubus mit dem Abdeckstreifen verspritzt wird.The shape of the packaging that can be provided with such a new opening device can of course differ from the cuboid shape shown here in the figures. Tubular or box-shaped packs are known, in which a paper web is also first punched and sprayed with the cover strip shortly before the pack is set up or a tube is formed.

Aus Figur 2 erkennt man ferner zwei Reißlinien l6, die bei einer bevorzugten Ausführungsform auch als Kreis oder Oval als endlose einzige Linie ineinander übergehen können. In Figur 2 ist die linke Schwächungs- oder Reißlinie l6 direkt neben der Lasche ll angeordnet, so daß beim Hochziehen der Zuglasche ll die Öffnung erfolgt. Der kreis- oder ovalför­mige Teil des Abdeckstreifens l0 besitzt innerhalb der Reißlinien l6 einen Wiederverschließrand, der in Figur 2 mit l7 bezeichnet ist. Auf diese Weise kann der herausge­rissene Teil der Öffnungsvorrichtung 7 wieder bis zur Anla­ge des Wiederverschließrandes l7 in die Öffnung hineinge­schoben und dort verrastet werden.2 also shows two tear lines 16, which in a preferred embodiment can also merge into one another as a circle or oval as an endless single line. In FIG. 2, the left weakening or tear line 16 is arranged directly next to the tab 11, so that the opening takes place when the pull tab 11 is pulled up. The circular or oval-shaped part of the cover strip l0 has a reclosing edge within the tear lines l6, which is denoted by l7 in FIG. In this way, the part of the opening device 7 which has been torn out can be pushed back into the opening until it rests on the reclosing edge 17 and locked there.

Ein innerer Abdeckstreifen l8 dichtet die Packung trotz der Gießkante 8 flüssigkeitsdicht ab.An inner cover strip l8 seals the package in a liquid-tight manner despite the pouring edge 8.

Claims (4)

1. Fließmittelpackung aus mit Kunststoff beschichtetem Trägermaterial aus Papier oder dergleichen, bei welcher die Seitenwände (2, 3) und/oder Deckel (l) und/oder Bo­den über Schweißnähte (4) und/oder Faltkanten (9) miteinander verbunden sind und im Deckel (l) oder der Seitenwand (2, 3) eine Öffnungsvorrichtung (7) ange­bracht ist, die einen ein ausgestanztes Loch (6) dich­tend übergreifenden Abdeckstreifen (l0) aufweist, da­durch gekennzeichnet, daß der Abdeckstreifen (l0) aus eingespritztem Kunststoff besteht und seine Randberei­che (l3) die Ränder (l4) des ausgestanzten Loches (6) beidseitig überdecken.1. plasticizer pack made of plastic-coated carrier material made of paper or the like, in which the side walls (2, 3) and / or cover (l) and / or bottom are connected to one another via weld seams (4) and / or folded edges (9) and in Lid (l) or the side wall (2, 3) an opening device (7) is attached, which has a punched hole (6) sealing overlapping cover strip (l0), characterized in that the cover strip (l0) consists of injected plastic and its edge areas (l3) cover the edges (l4) of the punched hole (6) on both sides. 2. Fließmittelpackung nach Anspruch l, dadurch gekennzeich­net, daß eine Zuglasche (ll) einstückig an dem Abdeck­streifen (l0) angespritzt ist.2. plasticizer according to claim l, characterized in that a pull tab (II) is integrally molded on the cover strip (l0). 3. Fließmittelpackung nach Anspruch l oder 2, dadurch ge­kennzeichnet, daß der Abdeckstreifen (l0) im Bereich des ausgestanzten Loches (6) eine dünne Folie ist und die Zuglasche (ll) in Gestalt eines senkrecht aus dem Abdeckstreifen (l0) hochstehenden flachen Feldes aus­gebildet ist.3. plasticiser according to claim l or 2, characterized in that the cover strip (l0) in the region of the punched hole (6) is a thin film and the pull tab (ll) in the form of a vertical field from the cover strip (l0) standing up flat field is. 4. Verfahren zur Herstellung einer Fließmittelpackung aus mit Kunststoff beschichtetem Trägermaterial aus Papier oder dergleichen, bei welcher die Seitenwände (2, 3) und/oder Deckel (l) und/oder Boden über Schweißnähte (4) und/oder Faltkanten (9) miteinander verbunden sind und im Deckel (l) oder der Seitenwand (2, 3) eine Öff­nungsvorrichtung (7) angebracht ist, die einen ein aus­gestanztes Loch (6) dichtend übergreifenden Abdeck­streifen (l0) aufweist, wobei die flachliegende be­schichtete Papierbahn von einer Vorratsrolle abgezogen, zu einem Tubus geformt, mit Fließmittel gefüllt, durch Quersiegelnähte abgeteilt, vereinzelt und zu Packungen geformt wird, dadurch gekennzeichnet, daß das Loch (6) für die Öffnungsvorrichtung (7) registerhaltig zum Auf­druck und/oder dem Falzlinienmuster vor oder nach Abzug von der Vorratsrolle in die Papierbahn eingestanzt wird und kurz vor dem Umformen der flachen Bahn in den Tubus der Abdeckstreifen (l0) flüssigkeitsdicht in das ausgestanz­te Loch (6) eingespritzt wird, wobei die Randbereiche (l3) des Abdeckstreifens (l0) mit der Kunststoffbe­schichtung beider Oberflächen der Papierbahn verschmel­zen.4. A process for producing a plasticizer-coated plastic or paper carrier, in which the side walls (2, 3) and / or cover (1) and / or bottom are welded together (4) and / or folded edges (9) are connected and in the cover (1) or the side wall (2, 3) there is an opening device (7) which has a cover strip (10) which overlaps a punched-out hole (6), the flat, coated paper web being pulled off a supply roll, formed into a tube, filled with eluent, through Cross seal seams are divided, separated and formed into packs, characterized in that the hole (6) for the opening device (7) is punched in register for printing and / or the fold line pattern before or after deduction from the supply roll into the paper web and shortly before the forming the flat web is injected liquid-tight into the punched hole (6) in the tube of the cover strip (l0), the edge regions (l3) of the cover strip (l0) fusing with the plastic coating of both surfaces of the paper web.
EP19860115910 1986-03-11 1986-11-15 Liquid package and method of producing the same Expired - Lifetime EP0236556B1 (en)

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AT86115910T ATE66193T1 (en) 1986-03-11 1986-11-15 DEVELOPMENT PACKING AND METHOD OF MAKING THE SAME.

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GB8605911 1986-03-11
GB8605911A GB2187712B (en) 1986-03-11 1986-03-11 Fluid pack and process for the production therof

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EP0236556A2 true EP0236556A2 (en) 1987-09-16
EP0236556A3 EP0236556A3 (en) 1989-04-26
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EP (1) EP0236556B1 (en)
JP (1) JPH0741916B2 (en)
AT (1) ATE66193T1 (en)
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DE (1) DE3680901D1 (en)
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EP0401546A1 (en) * 1989-06-07 1990-12-12 Tetra Laval Holdings & Finance SA Package for fluid materials and method of producing same
US5154342A (en) * 1989-06-07 1992-10-13 Tetra Pak Holding S.A. Package for flowable substances and a method of producing such a package
DE4009397A1 (en) * 1990-03-23 1991-09-26 Weidenhammer Packungen CAN-LIKE PACKAGING FOR FLOWABLE PRODUCTS
WO2021234022A1 (en) * 2020-05-20 2021-11-25 Elopak As Paper-based or paperboard-based container and method

Also Published As

Publication number Publication date
GB8605911D0 (en) 1986-04-16
GB2187712B (en) 1990-05-23
ATE66193T1 (en) 1991-08-15
ES2024409B3 (en) 1992-03-01
US4887765A (en) 1989-12-19
EP0236556B1 (en) 1991-08-14
GB2187712A (en) 1987-09-16
EP0236556A3 (en) 1989-04-26
DE3680901D1 (en) 1991-09-19
CA1324994C (en) 1993-12-07
JPH0741916B2 (en) 1995-05-10
JPS62220441A (en) 1987-09-28

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