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EP0179240B1 - Container manufactured from a plastic coated fibrous material and provided with a longitudinal joint with a folded back portion, the container being also provided with a tearable portion facilitating the opening; process for the manufacture of such a tearable portion - Google Patents

Container manufactured from a plastic coated fibrous material and provided with a longitudinal joint with a folded back portion, the container being also provided with a tearable portion facilitating the opening; process for the manufacture of such a tearable portion Download PDF

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Publication number
EP0179240B1
EP0179240B1 EP85111159A EP85111159A EP0179240B1 EP 0179240 B1 EP0179240 B1 EP 0179240B1 EP 85111159 A EP85111159 A EP 85111159A EP 85111159 A EP85111159 A EP 85111159A EP 0179240 B1 EP0179240 B1 EP 0179240B1
Authority
EP
European Patent Office
Prior art keywords
tear
seam
full
zone
cut
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
EP85111159A
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German (de)
French (fr)
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EP0179240A3 (en
EP0179240A2 (en
Inventor
Jürgen Färber
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.)
OFFERTA DI LICENZA AL PUBBLICO
Original Assignee
SIG Combibloc GmbH and Co KG
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.)
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Publication date
Application filed by SIG Combibloc GmbH and Co KG filed Critical SIG Combibloc GmbH and Co KG
Priority to AT85111159T priority Critical patent/ATE54890T1/en
Publication of EP0179240A2 publication Critical patent/EP0179240A2/en
Publication of EP0179240A3 publication Critical patent/EP0179240A3/en
Application granted granted Critical
Publication of EP0179240B1 publication Critical patent/EP0179240B1/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
    • B65D5/02—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 by folding or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body
    • B65D5/06—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 by folding or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body with end-closing or contents-supporting elements formed by folding inwardly a wall extending from, and continuously around, an end of the tubular body
    • B65D5/064—Rectangular containers having a body with gusset-flaps folded outwardly or adhered to the side or the top of the container
    • B65D5/065—Rectangular containers having a body with gusset-flaps folded outwardly or adhered to the side or the top of the container with supplemental means facilitating the opening, e.g. tear lines, tear tabs

Definitions

  • the invention relates to a tear-open tab opening and a method for producing such on packages made of plastic-coated composite material with a folded-over web seam closure. Such packs belong to the prior art.
  • Tear tab openings on packs have become known in many designs. It is known to make punchings or punchings in the opening area of a pack, which are then subsequently closed again with tear-open tabs.
  • these tabs which are not integral with the pack, are disadvantageous insofar as, in the case of sensitive products, for which not only dust-proof but also liquid-tight or gas-tight packaging is required, but especially with aseptic packaging, the originally full-surface inner coating of the composite material in the area of the opening is broken, which can lead to a reduction in the quality of the contents.
  • these tear-open tabs and the application process necessary for their attachment to the packaging are very complex.
  • Tear tabs have therefore already been developed which are formed in one piece with the pack.
  • European patent application 39 116 shows and describes a liquid pack with a tear tab opening into which a straw can be inserted.
  • the drinking straw hole is integrated in the side seam of the pack and is limited by incisions and cutouts in it.
  • another incision in the above "" can be provided covered seam part to solve and the 'hite the top layer of the composite material to avoid unnecessary opening.
  • the pull tabs created in this way are very short and easier to handle only when using complex shape cuts.
  • the tear-open tab opening is also arranged in the area of an overlap seam, which can therefore only be used in product groups that do not require all-round edge protection. It is therefore not suitable for aseptic packs.
  • a further tear tab opening has become known from US Pat. No. 4,244,474, in which a tear tab can be formed by incisions in the carrier material of the composite material that run parallel to one another. This finally merges into a circular opening which, like the surface between the cuts, is still covered by the non-severed layers of the composite material. This opening can therefore only be used and is therefore only designed for this purpose if this existing layer is pierced with a straw.
  • the invention is therefore based on the object of creating a tear-open tab opening on packs of plastic-coated composite material with a folded seam seal, which can be produced simply and inexpensively without the use of elaborate shape cuts and which is easy and convenient to handle while avoiding uncontrolled damage to the folded seam seal.
  • the folded-over web seam closure in at least one through an incision in the first pack area in a first seam region extending from a longitudinal edge of a first packing area to approximately the folded-over edge of a second packing area connected to the first packing area via the web seam closure formed full cut and in a second seam area adjoining the first seam area as an extension of the full cut has at least one weakening line which extends beyond the second seam area into the area of the first packing surface contacting the filling material.
  • the weakening line or the weakening lines are formed by a half-cut that only partially cuts through the single-layer or multi-layer wall of the first packing surface. It goes without saying. that a perforation can also be used instead of a half cut.
  • the first seam region or the full cuts has a wider design than the second seam region or the half cuts.
  • the line of weakness half-cut
  • the package can be opened even more easily because the scribing tab is gripped very easily and the entire opening is made via this and the subsequent lines of weakness can be.
  • an anti-adhesive can be applied in the area of the web seam closure delimited by the full cut or the half cuts or between the top of the second packing surface and the adjacent underside of the first packing surface and the underside of the folded edge.
  • the tear-open tab opening can be opened well via the scribing tab and the subsequent detonation of the edge protector and the inner coating, so that the product space is easily accessible.
  • the opening flap delimited by a single full cut can be arranged in a corner region of the web seam closure or else in the central region thereof.
  • the area delimiting the opening tab is formed by two full cuts spaced apart from one another. Weakening lines can then connect to the full cut (s) in the desired manner, e.g. in such a way that a dividing strip running around the pack is formed between the weakening lines, or else in such a way that the two full cuts are connected to one another by a common half cut.
  • the tear-open tab opening or the full and half cut required for this in the film cut can be made very easily on a pressure die-cutter, no complicated shape cuts being necessary for the cut production, but this can be done by means of roll, longitudinal and cross cutters.
  • the composite material consists in a known manner of an outer plastic coating, a carrier material consisting of cardboard or the like, a laminating film, an aluminum layer and an inner plastic coating.
  • the blank 1 has packing areas 2, 3, 4, 5 and 6, the packing area 2 being referred to in the further course of the description as the first packing area and the packing area 6 as the second packing area.
  • the first packing surface 2 and the second packing surface 6 can be connected to one another by means of a folded-over web seam, as shown in FIG. 3. This is a peeled web seam, ie the free end of the second packing surface 6 is folded inwards, so that edge protection is created all around the seam.
  • a further weakening line 13 can be provided in the packing surfaces 5 and 6, the purpose of which is explained in more detail below.
  • the full cut 8 extends over a first seam region 14 of the web seam closure 10, the first seam region 14 being wider than a second seam region 15, over which the half-cut 11 extends and which finally extends even further over the packing surfaces 2 and 3 extends.
  • the full cut 8 runs parallel to an edge 16 and transversely to a further edge 17 of the packing surface 2.
  • the full cut 8 forms a scribing flap 18 in the web seam closure 10, below which a further flap parallel to the edge 17 for easier entrainment of the material from the packaging surface 6
  • a line of weakness in the form of a half-cut 19 runs, namely at a short distance of up to approximately 3 mm from the edge 17.
  • a package 21 provided with such a tear-open tab opening is shown in FIG. 4. It can be seen here that an opening can be achieved via the tear-open tab 18 and by entraining the material of the packing surface 6 and tearing along the half-cut 11. as will be explained further below.
  • FIG. 5 also shows a further modified representation, two full cuts 27, 28 being arranged at a parallel distance from one another and being connected to one another via a common half cut 29.
  • the full cuts 27, 28 extend over the first seam area 14 and the weakening line 29 over the second seam area 15 and the packing surface 2 contacting the filling material.
  • an anti-adhesive agent 31 is applied to the folded edge of the web seam closure, the area of which is slightly larger than the area delimited by the full cuts 27, 28 and the edge 17.
  • the package 32 provided with such a tear-open tab opening is shown in FIG. 8.
  • Such an opening is suitable, for example, for pourable, powdery goods.
  • a full cut is a cut that cuts through the entire composite structure, while a half cut only cuts through the outer plastic coating and the carrier material, while leaving the other layers intact.
  • FIGS. 9 to 11 each show the order in which the opening of the pack is generated.
  • the tear-open tab opening is arranged in the region of a headstitch seam 33 of the pack, an ear of the pack formed by a folding triangle 34 is folded into the horizontal. Then the scribing tab 18 is gripped and folded up.
  • the layer of the second packing field 6 underneath is then entrained in a precisely controlled manner by detonating the edge protector (FIG. 10) and then the opening is made by tearing along the weakening lines, as is shown in FIG. 11.
  • further weakening lines can be provided in order to achieve different openings, e.g. 12, a drinking opening according to FIG. 13 and a spoon opening according to FIGS. 14 and 15.
  • a line of weakness can also easily be formed by the sealing seam edge of the head web seam 33, as is indicated in FIG. 11. If you want to achieve a larger opening, the lines of weakness have to widen outwards from the full cuts in order to finally converge towards the front. It is important that the opening tip extends into the area of the ear-like folding triangles 34, since only in this way is it possible to pour out a filled product properly.
  • the full and half cuts are expediently carried out together in one work step with the printing, grooving and punching of the finished coated composite material by means of a foil cut of a pressure punch.
  • the line of weakness 29 running parallel to the edge 17 can also be introduced further inwards and also in connection with the non-stick agent, so that the bond to be traversed is brought to half the strength when the web seam is not peeled, thus making tearing easier.

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  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Packages (AREA)
  • Cartons (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
  • Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Bag Frames (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)
  • Wrappers (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Abstract

The invention relates to a tear-open flap orifice on packs consisting of plastic-coated laminated material with a folded-round fillet-seam closure (10), there being in a first seam region (14) at least one full cut and in a second seam region (15) at least one weakening line in the form of a half cut which extends beyond the second seam region into the region of the first pack surface in contact with the filling material of the pack. As a result of an appropriate arrangement of the full cuts and half cuts, an easy-to-handle tear-open flap orifice is obtained by simple means for the entire range from drinking-straw, pour-out, drinking and spoon orifices to separating-strip orifices on freeze packs.

Description

Die Erfindung bezieht sich auf eine Aufreißlaschenöffnung und ein Verfahren zum Herstellen einer solchen an Packungen aus kunststoffbeschichtetem Verbundmaterial mit umgelegtem Stegnahtverschluß. Derartige Packungen gehören zum Stand der Technik.The invention relates to a tear-open tab opening and a method for producing such on packages made of plastic-coated composite material with a folded-over web seam closure. Such packs belong to the prior art.

Aufreißlaschenöffnungen an Packungen sind in vielfacher Ausführung bekanntgeworden. So ist es bekannt, im Öffnungsbereich einer packung Ein- oder Ausstanzungen vorzunehmen, die dann nachfolgend wieder mit Aufreißlaschen verschlossen werden. Diese mit der Packung nicht einstückigen Laschen sind aber insofern nachteilig, als bei empfindlichen Produkten, für die nicht nur eine staubsondern auch eine flüssigkeits-oder auch gasdichte Verpackung erforderlich ist, besonders aber bei aseptischen Verpackungen, die ursprünglich vollflächige Innenbeschichtung des Verbundmaterials im Bereich der Öffnung durchbrochen wird, was unter Umständen zu einer Qualitätsminderung des Füllgutes führen kann. Ferner sind diese Aufreißlaschen und das für ihre Befestigung an der Verpackung notwendige Applikationsverfahren sehr aufwendig.Tear tab openings on packs have become known in many designs. It is known to make punchings or punchings in the opening area of a pack, which are then subsequently closed again with tear-open tabs. However, these tabs, which are not integral with the pack, are disadvantageous insofar as, in the case of sensitive products, for which not only dust-proof but also liquid-tight or gas-tight packaging is required, but especially with aseptic packaging, the originally full-surface inner coating of the composite material in the area of the opening is broken, which can lead to a reduction in the quality of the contents. Furthermore, these tear-open tabs and the application process necessary for their attachment to the packaging are very complex.

Es sind daher auch schon Aufreißlaschen entwickelt worden, die mit der Packung einstückig ausgebildet sind. So ist z.B. in der europäischen Patentanmeldung 39 116 eine Flüssigkeitspakkung mit einer Aufreißlaschenöffnung dargestellt und beschrieben, in die ein Strohhalm eingeführt werden kann. Das Trinkhalmloch ist in die Seitennaht der Packung integriert und durch Ein-und Ausschnitte in dieser begrenzt. Wahlweise kann noch ein Einschnitt im ü ""deckten Nahtteil vorgesehen sein, um beim 'eißen die Deckschicht vom Verbundmaterial zu lösen und Fehlöffnungen zu vermeiden. Die auf diese Weise geschaffenen Aufreißlaschen sind sehr kurz und nur bei Verwendung aufwendiger Fassonschnitte leichter zu handhaben. Die Aufreißlaschenöffnung ist darüber hinaus im Bereich einer Überlappungsnaht angeordnet, die mithin nur bei Produktgruppen eingesetzt werden kann, die keinen rundum Kantenschutz erfordern. Sie ist daher für die Aseptikpackungen nicht geeignet.Tear tabs have therefore already been developed which are formed in one piece with the pack. For example, European patent application 39 116 shows and describes a liquid pack with a tear tab opening into which a straw can be inserted. The drinking straw hole is integrated in the side seam of the pack and is limited by incisions and cutouts in it. Optionally, another incision in the above "" can be provided covered seam part to solve and the 'hite the top layer of the composite material to avoid unnecessary opening. The pull tabs created in this way are very short and easier to handle only when using complex shape cuts. The tear-open tab opening is also arranged in the area of an overlap seam, which can therefore only be used in product groups that do not require all-round edge protection. It is therefore not suitable for aseptic packs.

Durch die US-Patentschrift 42 44 474 ist eine weitere Aufreißlaschenöffnung bekanntgeworden, bei der durch parallel zueinander verlaufende Einschnitte im Trägermaterial des Verbundmaterials eine Aufreißlasche gebildet werden kann. Diese geht schließlich in eine kreisförmige Öffnung über, die aber ebenso wie die zwischen den Schnitten befindliche Fläche noch von den nicht durchtrennten Schichten des Verbundmaterials abgedeckt sind. Diese Öffnung ist daher nur dann benutzbar und daher auch nur für diesen Zweck konzipiert, wenn diese vorhandene Schicht mit einem Strohhalm durchstochen wird.A further tear tab opening has become known from US Pat. No. 4,244,474, in which a tear tab can be formed by incisions in the carrier material of the composite material that run parallel to one another. This finally merges into a circular opening which, like the surface between the cuts, is still covered by the non-severed layers of the composite material. This opening can therefore only be used and is therefore only designed for this purpose if this existing layer is pierced with a straw.

Schließlich ist aus der kanadischen Patentschrift 678 370 eine Packung mit einer Aufreißlaschenöffnung bekanntgeworden, bei der im Bereich einer Überlappungsnaht durchgehende Schnitte und sich daran anschließende Perforationen vorgesehen sind, so daß die Verpackung zur Erzielung einer Öffnung seitlich aufgerissen werden kann. Dabei wird durch weitere, etwa V-förmige Einschnitte in der anderen Packungsfläche beim Aufreißen die Öffnung über die Aufreißlasche mitgeöffnet. Abgesehen davon, daß auch eine derartige Verschlußeinrichtung für aseptische Verpackungen mit ringsum laufendem Kantenschutz durch eine umgelegte Stegnaht nicht geeignet ist, kommt hinzu, daß auch hier wieder ein aufwendiger Fassonschnitt notwendig ist, um die entsprechenden Einschnitte im Bereich der Überlappungsnaht vorzusehen.Finally, from the Canadian patent 678 370 a package with a tear tab opening has become known, in which continuous cuts and perforations are provided in the area of an overlap seam, so that the packaging can be torn open to achieve an opening. The opening via the tear-open tab is also opened by further, approximately V-shaped incisions in the other pack surface when tearing open. In addition to the fact that such a closure device is not suitable for aseptic packaging with all-round edge protection due to a folded-over seam, there is also the fact that again a complex cut of the facade is necessary to provide the corresponding incisions in the area of the overlap seam.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Aufreißlaschenöffnung an Packungen aus kunststoffbeschichtetem Verbundmaterial mit umgelegtem Stegnahtverschluß zu schaffen, die ohne Verwendung von aufwendigen Fassonschnitten einfach und kostengünstig herzustellen und unter Vermeidung einer unkontrollierten Beschädigung des umgelegten Stegnahtverschlusses leicht und bequem zu handhaben ist.The invention is therefore based on the object of creating a tear-open tab opening on packs of plastic-coated composite material with a folded seam seal, which can be produced simply and inexpensively without the use of elaborate shape cuts and which is easy and convenient to handle while avoiding uncontrolled damage to the folded seam seal.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der umgelegte Stegnahtverschluß in einem sich von einer längsverlaufenden Randkante einer ersten Packungsfläche bis etwa an die umgelegte Kante einer mit der ersten Packungsfläche über den Stegnahtverschluß verbundenen zweiten packungsfläche erstreckenden ersten Nahtbereich wenigstens einen durch einen Einschnitt in der ersten Packungsfläche gebildeten Vollschnitt und in einem sich an den ersten Nahtbereich anschließenden zweiten Nahtbereich in Verlängerung des Vollschnittes wenigstens eine Schwächungslinie aufweist, die sich über den zweiten ahtbereich hinaus bis in den das Füllgut der p .kung kontaktierenden Bereich der ersten Packungsfläche erstreckt. Mit den Mitteln nach der Erfindung kommt man zu einer Aufreißlaschenöffnung, die bei einfacher Fertigung eine sichere Handhabung ermöglicht. Dabei ist sichergestellt, daß keinerlei Beschädigung bzw. Schwächung der das Füllgut der Packung kontaktierenden Innenbeschichtung eintritt.This object is achieved according to the invention in that the folded-over web seam closure in at least one through an incision in the first pack area in a first seam region extending from a longitudinal edge of a first packing area to approximately the folded-over edge of a second packing area connected to the first packing area via the web seam closure formed full cut and in a second seam area adjoining the first seam area as an extension of the full cut has at least one weakening line which extends beyond the second seam area into the area of the first packing surface contacting the filling material. With the means according to the invention, a tear-open tab opening is obtained which enables safe handling with simple manufacture. This ensures that there is no damage or weakening of the inner coating contacting the contents of the pack.

In zweckmäßiger Ausgestaltung ist die Schwächungslinie bzw. sind die Schwächungslinien von einem die ein- oder mehrlagige Wandung der ersten Packungsfläche nur teilweise durchtrennenden Halbschnitt gebildet. Es versteht sich. daß anstelle eines Halbschnittes auch eine Perforation verwendet werden kann. Um einerseits die Handhabung der Aufreißlaschenöffnung zu verbessern und andererseits die notwendige Dichtigkeit der Packung zu gewährleisten, ist gemäß einem weiteren Merkmal der Erfindung vorgesehen, daß der den oder die Vollschnitte aufweisende erste Nahtbereicht breiter als der den oder die Halbschnitte aufweisende zweite Nahtbereich ausgebildet ist.In an expedient embodiment, the weakening line or the weakening lines are formed by a half-cut that only partially cuts through the single-layer or multi-layer wall of the first packing surface. It goes without saying. that a perforation can also be used instead of a half cut. In order to improve the handling of the tear-open tab opening on the one hand and to ensure the necessary tightness of the pack on the other hand, according to a further feature of the invention it is provided that the first seam region or the full cuts has a wider design than the second seam region or the half cuts.

Wenn dann noch gemäß einem weiteren Merkmal der Erfindung in der der ersten Packungsfläche zugewandten Oberseite der zweiten Pakkungsfläche in einem durch den oder die Vollschnitte begrenzten, einen Anreißlappen bildenden Bereich des Stegnahtverschlusses eine mit geringem Abstand z.B. 0-3 mm parallel zu der längsverlaufenden Randkante der ersten Pakkungsfläche verlaufende Schwachungslinie (Halbschnitt) angeordnet ist, läßt sich die Packung noch leichter öffnen, da der Anreißlappen sehr leicht ergriffen und über diesen und die sich daran anschließenden Schwächungslinien die gesamte Öffnung hergestellt werden kann.If then, according to a further feature of the invention, in the upper side of the second packaging surface facing the first packaging surface in a region of the web seam closure which is delimited by the full section or sections and forms a scribing flap, one with a small distance, e.g. 0-3 mm parallel to the longitudinal edge of the first package surface, the line of weakness (half-cut) is arranged, the package can be opened even more easily because the scribing tab is gripped very easily and the entire opening is made via this and the subsequent lines of weakness can be.

Anstelle der parallel zur Randkante verlaufenden Schwächungslinie kann in dem durch den oder die Vollschnitt oder den oder die Halbschnitte begrenzten Bereich des Stegnahtverschlusses zwischen der Oberseite der zweiten Packungsfläche und der anliegenden Unterseite der ersten Packungsfläche sowie der Unterseite der umgelegten Kante ein Antihaftmittel aufgebracht werden. Auch in diesem Fall läßt sich die Aufreißlaschenöffnung über den Anreißlappen und das anschließende Sprengen des Kantenschutzes und der Innenbeschichtung gut öffnen, so daß der Füllgutraum leicht zugänglich ist.Instead of the line of weakness running parallel to the edge, an anti-adhesive can be applied in the area of the web seam closure delimited by the full cut or the half cuts or between the top of the second packing surface and the adjacent underside of the first packing surface and the underside of the folded edge. In this case, too, the tear-open tab opening can be opened well via the scribing tab and the subsequent detonation of the edge protector and the inner coating, so that the product space is easily accessible.

Der durch einen einzigen Vollschnitt begrenzte Öffnungslappen kann in einem Eckbereich des Stegnahtverschlusses angeordnet sein oder aber auch in dessen Mittenbereich. In diesem Fall wird der den Öffnungslappen begrenzende Bereich durch zwei mit Abstand zueinander verlaufende Vollschnitte gebildet. An den oder die Vollschnitte können sich dann in gewünschter Weise Schwächungslinien anschließen z.B. in der Weise, daß zwischen den Schwächungslinien ein rings um die Packung verlaufender Trennstreifen gebildet wird oder aber auch in der Weise, daß die beiden Vollschnitte durch einen gemeinsamen Halbschnitt miteinander verbunden sind.The opening flap delimited by a single full cut can be arranged in a corner region of the web seam closure or else in the central region thereof. In this case, the area delimiting the opening tab is formed by two full cuts spaced apart from one another. Weakening lines can then connect to the full cut (s) in the desired manner, e.g. in such a way that a dividing strip running around the pack is formed between the weakening lines, or else in such a way that the two full cuts are connected to one another by a common half cut.

Bei entsprechend nach außen gehendem Verlauf der Schwächungslinien, ausgehend von dem oder den Vollschnitten, lassen sich somit in der Packung neben Trinkhalm-, Ausgieß- und Trinköffnung auch Löffelöffnungen bilden. Dabei ist es zweckmäßig, wenn die Schwächungslinien hinter den Vollschnitten spitz zulaufen und sich die Öffnungsspitze bis in den Bereich von an den Seiten der Packung anliegenden ohrenartigen Faltdreiecken erstrecken. Derartige Packungen lassen sich leicht öffnen und beim Öffnen wird kein Füllgut verschüttet, da die Packung beim Öffnen mit dem packungsboden voll auf einer Unterlage steht und dies unter Beibehaltung der Faltgeometrie, d.h. es tritt keine Verformung des Füllgutraumes ein. Bei den sogenannten Ohrenpackungen ist lediglich die Eckennaht hochzustellen.With a corresponding outward course of the weakening lines, starting from the full cut or cuts, in addition to drinking straw, pouring and drinking opening, spoon openings can also be formed in the package. It is expedient here if the lines of weakness taper behind the full cuts and the opening tip extends into the area of the ear-like folding triangles abutting the sides of the pack. Such packs are easy to open and no filling material is spilled when opening, since the pack stands fully on a base with the pack bottom and this while maintaining the folding geometry, i.e. there is no deformation of the product space. With the so-called ear packs, only the corner seam has to be put up.

Von besonderer Bedeutung für die vorliegende Erfindung ist ein zum Anbringen einer Aufreißlaschenöffnung an Packungen geeignetes Verfahren, das darin besteht, daß das Einbringen des oder der Vollschnitte und des oder der Schwächungslinien (Halbschnitte) in die Packungsflächen in einem Arbeitsgang zusammen mit dem Bedrucken. Nuten und Stanzen des fertigbeschichteten Verbundmaterials erfolgt.Of particular importance for the present invention is a method suitable for attaching a tear-open tab opening to packs, which consists in the fact that the introduction of the full cut or cuts and the weakening line or lines (half cuts) into the pack areas in one operation together with the printing. The finished coated composite material is grooved and punched.

Auf diese Weise läßt sich die Aufreißlaschenöffnung bzw. der dazu notwendige Voll- und Halbschnitt im Folienschnitt auf einer Druckstanze sehr leicht einbringen, wobei für die Zuschnittfertigung keine komplizierten Fassonschnitte notwendig sind, sondern dies über Rollen-, Längs-und Querschneider erfolgen kann.In this way, the tear-open tab opening or the full and half cut required for this in the film cut can be made very easily on a pressure die-cutter, no complicated shape cuts being necessary for the cut production, but this can be done by means of roll, longitudinal and cross cutters.

Bevorzugte Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und werden im folgenden näher beschrieben. Es zeigen:

  • Fig. 1 eine Aufsicht auf einen Packungszuschnitt mit Voll- und Halbschnitten zur Bildung einer Aufreißlaschenöffnung im Eckbereich eines umgelegten Stegnahtverschlusses.
  • Fig. 2 einen Teilausschnitt auf die in Fig. 1 dargestellte Anordnung.
  • Fig. 3 einen Querschnitt durch den in Fig. 2 dargestellte Teil ausschnitt mit geschälter Stegnaht.
  • Fig. 4 eine Packung mit einer Aufreißlaschenöffnung gemäß den Figuren 1, bis 3.
  • Fig. 5 eine Aufsicht auf einen Packungszuschnitt mit Voll- und Halbschnitten zur Bildung einer Aufreißlaschenöffnung im Mittenbereich des Stegnahtverschlusses.
  • Fig. 6 einen Teilausschnitt auf die in Fig. 5 dargestellte Anordnung einer Aufreißlaschenöffnung im Mittenbereich des Stegnahtverschlusses.
  • Fig. 7 einen Querschnitt durch den in Fig. 6 ' dargestellten Stegnahtverschluß mit einem Antihaftmittel.
  • Fig. 8 eine Packung mit einer Aufreißlaschenöffnung gemäß den Figuren 5 bis 7.
  • Fig. 9-11 eine Packung in verschiedenen Öffnungsstadien.
  • Fig. 12 eine Packung mit einer Ausgießöffnung.
  • Fig. 13 eine Packung mit einerTrinköffnung und
  • Fig. 14, 15 eine Packung in der Aufsicht und in schematischer Darstellung mit einer Löffelöffnung.
Preferred embodiments of the invention are shown in the drawing and are described in more detail below. Show it:
  • Fig. 1 is a plan view of a package blank with full and half cuts to form a tear tab opening in the corner region of a folded web seam closure.
  • Fig. 2 shows a partial section of the arrangement shown in Fig. 1.
  • Fig. 3 shows a cross section through the part shown in Fig. 2 section with peeled web seam.
  • 4 shows a pack with a tear-open tab opening according to FIGS. 1 to 3.
  • Fig. 5 is a plan view of a package blank with full and half cuts to form a tear tab opening in the central region of the web seam closure.
  • 6 shows a partial section of the arrangement of a tear-open tab opening shown in FIG. 5 in the central region of the web seam closure.
  • Fig. 7 shows a cross section through the web seam closure shown in Fig. 6 'with an anti-adhesive.
  • 8 shows a pack with a tear-open tab opening according to FIGS. 5 to 7.
  • Fig. 9-11 a pack in different opening stages.
  • Fig. 12 shows a pack with a pouring opening.
  • Figure 13 shows a pack with a drinking opening and
  • 14, 15 a pack in the top view and in a schematic representation with a spoon opening.

In Fig. 1 ist ein Zuschnitt eines Verbundmaterials zur Herstellung einer Packung dargestellt. Das Verbundmaterial besteht in bekannter Weise aus einer äußeren Kunststoffbeschichtung, einem aus Karton oder dergleichen bestehendem Trägermaterial, einem Kaschierfilm, einer Aluminiumschicht und einer inneren Kunststoffbeschichtung. Der Zuschnitt 1 weist Packungsflächen 2, 3, 4, 5, und 6 auf, wobei die Packungsfläche 2 im weiteren Verlauf der Beschreibung als erste Packungsfläche und die Packungsfläche 6 als zweite Packungsfläche bezeichnet ist. Nach Falten des Zuschnittes 1 entlang darin vorgesehener Nutlinien 7 können die erste Packungsfläche 2 und zweite Packungsfläche 6 mittels einer umgelegten Stegnaht, so wie sie in Figur 3 dargestellt ist, miteinander verbunden werden. Hierbei handelt es sich um eine geschälte Stegnaht, d. h. daß freie Ende der zweiten Packungsfläche 6 ist nach innen hin umgelegt, so daß entlang der Naht ringsum ein Kantenschutz entsteht. In der Pakkungsfläche 2 sind ein Einschnitt in Gestalt eines Vollschnitts 8 sowie ein weiterer Vollschnitt 9 und sich jeweils daran anschließende Schwächungslinien in Gestalt eines Halbschnittes 11, 12 eingebracht. Eine weitere Schwächungslinie 13 kann in den Packungsflächen 5 und 6 vorgesehen sein, deren Zweck weiter unten näher erläutert wird.1 shows a blank of a composite material for the production of a package. The composite material consists in a known manner of an outer plastic coating, a carrier material consisting of cardboard or the like, a laminating film, an aluminum layer and an inner plastic coating. The blank 1 has packing areas 2, 3, 4, 5 and 6, the packing area 2 being referred to in the further course of the description as the first packing area and the packing area 6 as the second packing area. After folding the blank 1 along groove lines 7 provided therein, the first packing surface 2 and the second packing surface 6 can be connected to one another by means of a folded-over web seam, as shown in FIG. 3. This is a peeled web seam, ie the free end of the second packing surface 6 is folded inwards, so that edge protection is created all around the seam. An incision in the form of a full cut 8 and a further full cut 9 and subsequent weakening lines in the form of a half cut 11, 12 are made in the packaging surface 2 brings. A further weakening line 13 can be provided in the packing surfaces 5 and 6, the purpose of which is explained in more detail below.

Wie aus Fig. 2 hervorgeht, erstreckt sich der Vollschnitt 8 über einen ersten Nahtbereich 14 des Stegnahtverschlusses 10, wobei der erste Nahtbereich 14 breiter als ein zweiter Nahtbereich 15 ist, über den sich der Halbschnitt 11 erstreckt und der sich schließlich noch weiter über die Packungsflächen 2 und 3 erstreckt. Der Vollschnitt 8 verläuft parallel zu einer Randkante 16 und quer zu einer weiteren Randkante 17 der Packungsfläche 2. Durch den Vollschnitt 8 wird im Stegnahtverschluß 10 ein Anreißlappen 18 gebildet, unterhalb dessen zum leichteren Mitreißen des Materials aus der Verpackungsfläche 6 parallel zur Randkante 17 eine weitere Schwächungslinie in Form eines Halbschnittes 19 verläuft, und zwar in einem geringen Abstand bis zu etwa 3 mm zur Randkante 17. Eine mit einer derartigen Aufreißlaschenöffnung versehene Packung 21 ist in Fig. 4 dargestellt. Man sieht hier, daß über den Aufreißlappen 18 und durch Mitreißen des Materials der Packungsfläche 6 und Weiterreißen entlang des Halbschnittes 11 eine Öffnung erzielt werden kann. wie das weiter unten noch weiter erläutert wird.As can be seen from FIG. 2, the full cut 8 extends over a first seam region 14 of the web seam closure 10, the first seam region 14 being wider than a second seam region 15, over which the half-cut 11 extends and which finally extends even further over the packing surfaces 2 and 3 extends. The full cut 8 runs parallel to an edge 16 and transversely to a further edge 17 of the packing surface 2. The full cut 8 forms a scribing flap 18 in the web seam closure 10, below which a further flap parallel to the edge 17 for easier entrainment of the material from the packaging surface 6 A line of weakness in the form of a half-cut 19 runs, namely at a short distance of up to approximately 3 mm from the edge 17. A package 21 provided with such a tear-open tab opening is shown in FIG. 4. It can be seen here that an opening can be achieved via the tear-open tab 18 and by entraining the material of the packing surface 6 and tearing along the half-cut 11. as will be explained further below.

Bei dem in den Figuren 5 bis 8 dargestellten Ausführungsbeispiel geht man von einem Zuschnitt 1 aus, bei dem in einem Mittenbereich der gebildeten umgelegten Stegnaht zwei Vollschnitte 22, 23 angebracht sind an die sich Halbschnitte 24, 25 unter Bildung eines Trennstreifens 26 anschließen, der rings um die zu bildende Packung verläuft und beispielsweise für Gefrierpackungen geeignet ist.In the embodiment shown in Figures 5 to 8, one starts from a blank 1, in which two full cuts 22, 23 are made in a central region of the folded web seam formed, to which half-cuts 24, 25 are connected to form a separating strip 26, which is ring-shaped runs around the pack to be formed and is suitable, for example, for frozen packs.

Eine weitere abgeänderte Darstellung zeigt ebenfalls Fig. 5, wobei zwei Vollschnitte 27, 28 mit parallelem Abstand zueinander angeordnet sind und über einen gemeinsamen Halbschnitt 29 miteinander verbunden sind. Diese Anordnung ist in Fig. 6 näher erläutert. Auch hierbei erstrecken sich die Vollschnitte 27, 28 über den ersten Nahtbereich 14 und die Schwächungslinie 29 über den zweiten Nahtbereich 15 sowie die das Füllgut kontaktierende Packungsfläche 2. In diesem Fall ist zwischen der Oberseite der zweiten Packungsfläche 6 und der zugewandten Unterseite der Packungsfläche 2 sowie der umgelegten Kante des Stegnahtverschlusses ein Antihaftmittel 31 aufgebracht, dessen Fläche geringfügig größer als der durch die Vollschnitte 27, 28 und die Randkante 17 begrenzte Bereich ist.5 also shows a further modified representation, two full cuts 27, 28 being arranged at a parallel distance from one another and being connected to one another via a common half cut 29. This arrangement is explained in more detail in FIG. 6. Here, too, the full cuts 27, 28 extend over the first seam area 14 and the weakening line 29 over the second seam area 15 and the packing surface 2 contacting the filling material. In this case there is between the top of the second packing surface 6 and the facing underside of the packing surface 2 and an anti-adhesive agent 31 is applied to the folded edge of the web seam closure, the area of which is slightly larger than the area delimited by the full cuts 27, 28 and the edge 17.

Die mit einer derartigen Aufreißlaschenöffnung versehene Packung 32 ist in Fig. 8 dargestellt. Eine derartige Öffnung ist beispielweise geeignet für schüttfähige, pulverförmige Güter.The package 32 provided with such a tear-open tab opening is shown in FIG. 8. Such an opening is suitable, for example, for pourable, powdery goods.

Bei einem Vollschnitt handelt es sich um einen Schnitt, der den gesamten Verbundaufbau durchtrennt, während ein Halbschnitt nur die äußere Kunststoffbeschichtung und das Trägermaterial durchschneidet, hingegen die anderen Schichten unversehrt läßt.A full cut is a cut that cuts through the entire composite structure, while a half cut only cuts through the outer plastic coating and the carrier material, while leaving the other layers intact.

In den Fig. 9 bis 11 ist jeweils dargestellt, in welcher Reihenfolge die Öffnung der Packung erzeugt wird. Dabei wird zunächst bei der Anordnung der Aufreißlaschenöffnung im Bereich einer Kopfstegnaht 33 der Packung ein durch ein Faltdreieck 34 gebildetes Ohr der Packung in die Waagerechte geklappt. Danach wird der Anreißlappen 18 ergriffen und nach oben geklappt. Dabei wird dann die darunter befindliche Schicht des zweiten Packungsfeldes 6 in genau kontrollierter Weise durch Sprengen des Kantenschutzes mitgerissen (Fig. 10) und anschließend durch Weiterreißen entlang der Schwächungslinien die Öffnung hergestellt, so wie das in Fig. 11 dargestgellt ist. Wie in den genannten Figuren angedeutet, können weitere Schwächungslinien vorgesehen sein, um unterschiedliche Öffnungen zu erzielen, z.B. eine Ausgießöffnung gemäß Fig. 12, eine Trinköffnung gemäß Fig. 13 und eine Löffelöffnung gem, den Fig. 14 und 15.9 to 11 each show the order in which the opening of the pack is generated. First, when the tear-open tab opening is arranged in the region of a headstitch seam 33 of the pack, an ear of the pack formed by a folding triangle 34 is folded into the horizontal. Then the scribing tab 18 is gripped and folded up. The layer of the second packing field 6 underneath is then entrained in a precisely controlled manner by detonating the edge protector (FIG. 10) and then the opening is made by tearing along the weakening lines, as is shown in FIG. 11. As indicated in the figures mentioned, further weakening lines can be provided in order to achieve different openings, e.g. 12, a drinking opening according to FIG. 13 and a spoon opening according to FIGS. 14 and 15.

Eine Schwächungslinie kann ohne weiteres auch durch die Siegelnahtkante der Kopfstegnaht 33 gebildet sein, so wie das in Fig. 11 angedeutet ist. Sofern man eine größere Öffnung erzielen will, müssen die Schwächungslinien sich ausgehend von den Vollschnitten nach außen verbreitern, um dann schließlich wieder nach vorne spitz zusammenzulaufen. Dabei ist wichtig, daß die Öffnungsspitze bis in den Bereich der ohrenartigen Faltdreiecke 34 verläuft, da erst auf diese Weise ein gutes Ausgießen eines eingefüllten Produktes möglich ist.A line of weakness can also easily be formed by the sealing seam edge of the head web seam 33, as is indicated in FIG. 11. If you want to achieve a larger opening, the lines of weakness have to widen outwards from the full cuts in order to finally converge towards the front. It is important that the opening tip extends into the area of the ear-like folding triangles 34, since only in this way is it possible to pour out a filled product properly.

Das Einbringen der Voll- und Halbschnitte erfolgt zweckmäßigerweise zusammen in einem Arbeitsgang mit dem Bedrucken, Nuten und Stanzen des fertig beschichteten Verbundmaterials durch einen Folienschnitt einer Druckstanze.The full and half cuts are expediently carried out together in one work step with the printing, grooving and punching of the finished coated composite material by means of a foil cut of a pressure punch.

Es versteht sich, daß die parallel zur Randkante 17 verlaufende Schwächungslinie 29 auch weiter nach innen und auch in Verbindung mit dem Antihaftmittel eingebracht werden kann, so daß der zu durchlaufende Verbund bei ungeschälter Stegnaht auf halbe Stärke gebracht und somit das Aufreißen erleichtert wird.It goes without saying that the line of weakness 29 running parallel to the edge 17 can also be introduced further inwards and also in connection with the non-stick agent, so that the bond to be traversed is brought to half the strength when the web seam is not peeled, thus making tearing easier.

Claims (13)

1. A tear-open strip opening on packages of plastics-coated composite material having a wrapped-around web seam closure, characterized in that the web seam closure (10) has, in a first seam zone (19) extending from a longitudinally extending side edge (17) of a first packaging surface (2) substantially as far as the wrapped-around edge of a second packaging surface (6) connected to the first packaging surface (2) via the web seam closure (10), at least one full cut (8, 22, 23, 27, 28) formed by an incision in the first packaging surface (2), and in a second seam zone (15) in the prolongation of the full cut and adjoining the first seam zone (14), at least one weakening line (11, 12, 24, 25, 29) which extends beyond the second seam zone (15) as far as that zone of the first packaging surface (2) which contacts the material with which the packaging (21, 32) is filled.
2. A tear-open strip opening according to Claim 1, characterized in that the or each weakening line (11, 12, 24, 25, 29) is formed by a half cut only partially separating the single-layer or multi-layer wall of the first packaging surface (2).
3. A tear-open strip opening according to Claims 1 or 2, characterized in that the first seam zone (14) having the or each full cut (8, 23, 27, 28) is constructed wider than the second seam zone (15) having the or each half cut (11, 24, 25, 29).
4. A tear-open strip opening according to one or more of Claims 1 to 3, characterized in that a weakening line (half cut) (19) extending at a short distance parallel with the longitudinally extending side edge (17) of the first packaging surface (2) is disposed in a zone of the web seam closure (10) forming a tear-open flap (18) and bounded by the or each full cut (8) in the top side of the second packaging surface (6) adjacent the first packaging surface (2).
5. A tear-open strip opening according to one or more of Claims 1 to 3, characterized in that an anti-adhesion agent is applied in those zones of the web seam closure (10) which are bounded by the or each full cut (27, 28) or the or each half cut (29), between the top side of the second packaging surface (6) and the underside of the first packaging surface (2) and the underside of the wrapped-around edge of the web seam closure.
6. A tear-open strip opening according to Claim 5, characterized in that the application surface of the anti-adhesion agent (31) is slightly larger than that zone of the web seam closure (10) which is bounded by the full cuts (27, 28) and half cut (29) and also the longitudinally extending side edge (17) of the first packaging surface (2).
7. A tear-open strip opening according to one or more of Claims 1 to 6, characterized in that the opening flap (18) bounded by a single full cut (8) is disposed in a corner zone of the web seam closure (10).
8. A tear-open strip opening according to one or more of Claims 1 to 6, characterized in that the opening flap (18), bounded by two full cuts (22, 23, 27, 28) extending at a distance from one another, is disposed in a central zone of the web seam closure.
9. A tear-open strip opening according to Claim 8, characterized in that a separate half cut (24, 25) is associated with each of the two full cuts (22, 23), enclosing therebetween a parting strip (26) extending around the packaging.
10. A tear-open strip opening according to Claim 8, characterized in that a common half cut (22) interconnecting the two full cuts (27, 28) is associated therewith.
11. A tear-open strip opening according to one or more of Claims 1 to 7, characterized in that a tapered half cut (11) is associated with and in the prolongation of a full cut (8) disposed in the corner zone of the web seam closure (10), and a further weakening line is formed by the seal seam edge (35) of a head web seam (33) extending substantially transversely of the web seam closure (10).
12. A tear-open strip opening according to Claim 11, characterized in that starting from full cuts (8, 9), weakening lines (11, 12, 13), widening the opening to be formed, first extend outwardly and then taper, the opening tip extending as far as the zone of ear-like folding triangles (34) bearing against the sides (21, 32) of the packaging.
13. A method of applying a tear-open strip opening for packages of plastics-coated composite material with a wrapped-over web seam closure according to one or more of Claims 1 to 12, characterized in that the or each full cut and the or each weakening line (half cuts) are made in the packaging surfaces in one operation together with the printing, grooving and punching of the finished coated composite material.
EP85111159A 1984-10-25 1985-09-04 Container manufactured from a plastic coated fibrous material and provided with a longitudinal joint with a folded back portion, the container being also provided with a tearable portion facilitating the opening; process for the manufacture of such a tearable portion Expired - Lifetime EP0179240B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85111159T ATE54890T1 (en) 1984-10-25 1985-09-04 TEAR-POINT OPENING ON PLASTIC-COATED COMPOSITE PACKAGES WITH FOLDED BAR SEAM SEAL AND METHOD OF MAKING THE TEAR-POINT OPENING.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843439102 DE3439102A1 (en) 1984-10-25 1984-10-25 Tear-tab opening on packs made of plastic-coated composite material with folded-over bar closure and method for producing the tear-tab opening
DE3439102 1984-10-25

Publications (3)

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EP0179240A2 EP0179240A2 (en) 1986-04-30
EP0179240A3 EP0179240A3 (en) 1988-07-27
EP0179240B1 true EP0179240B1 (en) 1990-07-25

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EP85111159A Expired - Lifetime EP0179240B1 (en) 1984-10-25 1985-09-04 Container manufactured from a plastic coated fibrous material and provided with a longitudinal joint with a folded back portion, the container being also provided with a tearable portion facilitating the opening; process for the manufacture of such a tearable portion

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US (1) US4666044A (en)
EP (1) EP0179240B1 (en)
JP (1) JPS61104943A (en)
AT (1) ATE54890T1 (en)
AU (1) AU575690B2 (en)
BR (1) BR8505317A (en)
DE (1) DE3439102A1 (en)
ES (1) ES296937Y (en)
FI (1) FI854030L (en)
MX (1) MX163966B (en)
ZA (1) ZA857260B (en)

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BR8505317A (en) 1986-08-05
AU4831885A (en) 1986-05-01
ATE54890T1 (en) 1990-08-15
ZA857260B (en) 1986-12-30
EP0179240A3 (en) 1988-07-27
AU575690B2 (en) 1988-08-04
DE3439102A1 (en) 1986-04-30
FI854030L (en) 1986-04-26
ES296937Y (en) 1988-11-16
ES296937U (en) 1988-02-16
MX163966B (en) 1992-07-07
FI854030A0 (en) 1985-10-16
US4666044A (en) 1987-05-19
DE3439102C2 (en) 1988-10-27
EP0179240A2 (en) 1986-04-30
JPS61104943A (en) 1986-05-23

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