EP0244674B1 - Liquid package, method for making it and plastic web for making it - Google Patents

Liquid package, method for making it and plastic web for making it Download PDF

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Publication number
EP0244674B1
EP0244674B1 EP87105546A EP87105546A EP0244674B1 EP 0244674 B1 EP0244674 B1 EP 0244674B1 EP 87105546 A EP87105546 A EP 87105546A EP 87105546 A EP87105546 A EP 87105546A EP 0244674 B1 EP0244674 B1 EP 0244674B1
Authority
EP
European Patent Office
Prior art keywords
strip
layer
opening
pack
opening strip
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
EP87105546A
Other languages
German (de)
French (fr)
Other versions
EP0244674A2 (en
EP0244674A3 (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 Pak AB
Original Assignee
Tetra Pak AB
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 AB filed Critical Tetra Pak AB
Priority to AT87105546T priority Critical patent/ATE77798T1/en
Publication of EP0244674A2 publication Critical patent/EP0244674A2/en
Publication of EP0244674A3 publication Critical patent/EP0244674A3/en
Application granted granted Critical
Publication of EP0244674B1 publication Critical patent/EP0244674B1/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
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/22—Details
    • B65D77/30—Opening or contents-removing devices added or incorporated during filling or closing of containers
    • B65D77/32—Tearing-strings or like flexible elements
    • B65D77/34—Tearing-strings or like flexible elements enclosed in a mouth seal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
    • B65D5/42—Details of containers or of foldable or erectable container blanks
    • B65D5/72—Contents-dispensing means
    • B65D5/74—Spouts
    • B65D5/741—Spouts for containers having a tubular body
    • B65D5/742—Spouts formed by deforming or tearing the closure flaps or severed or incised parts of the closure flaps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/91—Product with molecular orientation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31786—Of polyester [e.g., alkyd, etc.]
    • Y10T428/31797—Next to addition polymer from unsaturated monomers

Definitions

  • the invention relates to a pack for liquids made of plastic-coated cardboard carrier material, with a longitudinal weld seam and at least one transverse weld seam lying in a double cardboard strip on the top of the pack, in which an opening device is arranged in the form of a double-layered, one-sided sealed opening strip, the outer sides of which are arranged with are connected to the inside of the double cardboard strip and which consists of a laminated plastic, one layer of which is aligned in the longitudinal direction.
  • liquid packs made of plastic, paper, cardboard or the like are known, for example in parallelepiped form.
  • the usual parallelepipedic liquid pack has at least in the upper area on opposite sides two triangular lobes, and the double cardboard strip mentioned at the beginning extends in this known pack from the tip of one triangular tab to the tip of the opposite other triangular tab.
  • An opening device known from DE-A-27 47352 consists of part of a hose made of laminated plastic, the axis of the hose part running parallel to the longitudinal weld seam and consequently transverse to the transverse weld seam.
  • one layer is oriented or oriented in the tear direction, and on this layer, where the connection with the double cardboard strip must be made, a more sealable plastic layer is laminated on.
  • the invention is therefore based on the object of creating a pack for liquids of the type specified at the outset, the production of which from a hose enables the end user to understand the tearing action with a simple and inexpensive to produce opening device with good hygiene properties.
  • the opening strip is U-shaped in cross section and is arranged such that the free ends of the legs are directed towards the inside of the package, the legs of the U only at the beginning and end of the opening strip to an initial and an end sealing area are welded together, the initial sealing area with a first part constitutes a gripping tab protruding from the double cardboard strip and is sealed with a second part in the area of the intersecting longitudinal and transverse weld seam in the double cardboard strip and that the end sealing area in the pouring area of the opening device in the double cardboard strip is sealed.
  • the novel design and arrangement of the opening strip according to the invention advantageously eliminates the formation of pockets which are accessible from the outside and in which contaminants can collect.
  • the initial seal area gets its name because the end user starts the tearing process here. Only part of this area forms the gripping tab, the other second part forms the front closure, while the end sealing area forms the rear closure of the opening strip with the double cardboard strip. Above, i.e. to the outside, the opening strip - via its connecting web - is closed.
  • the end sealing area does not have to be arranged exactly at the tip of the pouring end, i.e. in the tip of the doubled triangular flap of a parallelepipedic pack; if desired, the opening strip with the end sealing area can be folded over beyond the point of the pouring tip so that it is still in the pouring area remains.
  • the opening strip can thereby be made shorter or longer, and the attachment and fixing of the opening strip to the material web can be influenced, for example, by reinforcing it by larger areas.
  • the invention is expediently further developed in that, on the gripping flap, starting from the lower free leg ends and extending obliquely upward into the initial sealing region, a tear-open slot penetrates the opening strip almost completely.
  • This tear-open slot facilitates the opening process because the starting tear point is controlled by this slot to be placed in the correct position in the opening strip or the tear-open begins at the correct point near the upper connecting web.
  • the end of the tear-open slot is provided near the upper connecting web of the two legs of the opening strip.
  • the connecting web of the opening strip is arranged within the outer contour of the double cardboard strip, the liquid pack can be produced particularly well from a hose, because the filled web in the filling machine is then always cut outside the opening strip, directly outside of it.
  • the dividing line between two packs in succession within the tube is thus directly outside the opening strip, so that it remains closed and the pack can nevertheless be separated.
  • the respective end of the two packs to be separated from one another is sealed on both sides in addition to the cutting line, and the arrangement of the opening strip and its sealing on the material web must be based on the position of the respective transverse sealing seam that no leaks are to be feared.
  • the initial sealing area extends over the entire width of the opening strip. The welding area of the opening strip thus extends beyond the longitudinal sealing seam into the interior of the package, which ensures that no liquid can escape from the interior of the package, even if the tear-open slot is provided.
  • two weakening lines run at a distance from one tear strip from one another in the region of the connecting web of the opening strip along the same. This measure specifies a preferred direction of tearing, by means of which the tearing is steered in the correct paths without the end user's intervention.
  • These lines of weakness can be thinned areas or the like, of course real perforation is not possible because the lines of weakness must remain liquid-tight.
  • the end seal area can also be welded in close proximity to the pouring tip of the opening device, and the opening strip can extend from the gripping flap next to the longitudinal sealing seam to the pouring tip. It has been shown that it is generally sufficient to save material if the opening strip is made just as long as the opening for the pouring. Alternative ways to lay around of the opening strip around the pouring tip have been explained above.
  • a second, better heat-sealable plastic layer than the first layer is applied to the surface of a first plastic layer aligned in the longitudinal direction of the opening strip, and a third, also better heat-sealable plastic layer than the first layer is applied to the other, opposite surface of the first layer, and if the sealability temperature of the second layer is lower than that of the third layer.
  • a plastic structure favors the sealing of the opening strip to the respective inner surface of the double cardboard strip, without the legs of the opening strip being sealed to themselves or to one another on the inside. In other words, the package would not be able to be opened by tearing up the upper connecting web, as intended, if the opening strip was completely closed further down.
  • the material combination of the individual plastic layers completely eliminates such problems.
  • the package with the features mentioned above is also to be characterized in that the first layer consists of polyester stretched in the longitudinal direction of the opening strip, the second layer consists of a thermoplastic ionomer resin based on crosslinked ethylene copolymers and the third layer consists of PETG.
  • the first layer consists of polyester stretched in the longitudinal direction of the opening strip
  • the second layer consists of a thermoplastic ionomer resin based on crosslinked ethylene copolymers
  • the third layer consists of PETG.
  • cyclohexane-modified polyester can be used. It has been shown that even when such a material is stretched, it does not become crystalline and thus retains its heat sealability.
  • the opening strip according to the invention can be produced particularly well and easily and can be connected to the packaging in an expedient manner.
  • the register-correct attachment of the opening strip thus prepared to the inside of the packaging web is not technically difficult, not even with the condition that the gripping tab projects beyond the cutting edge of the web transversely to the latter.
  • the longitudinal direction of the opening strip is therefore transverse to the cutting edge or to the later longitudinal sealing seam. If the material web thus provided with the opening strip is then formed into a tube and closed via the longitudinal weld seam, the gripping tab protrudes from this longitudinal weld seam.
  • the usual steps for creating the pack are known per se.
  • a tear-open slot is introduced into the initial sealing area.
  • the position and arrangement of this tear-open slot has already been written above.
  • it is particularly expedient according to the invention if, on the gripping tab, starting from the lower free leg ends and extending obliquely upward into the initial sealing area, a tear slit is made which almost completely penetrates the opening strip. In doing so, she repeats that the tear-open slot can be introduced both before the opening strip is folded twice and after it has been folded, but before it is welded onto itself or afterwards.
  • “Sealability temperature” is understood here to mean the temperature at which the material is or becomes seal
  • the so-called second layer with the lower sealability temperature than the third layer must come to lie on the outside of the double-folded, finished opening strip.
  • the purpose of the arrangement of the second layer on the outside of the opening strip is that when the individual packs and individual pieces are welded together, care is taken that the opening strip made of plastic adheres to the double cardboard strip in a liquid-tight manner, but that the opening strip itself extends over the largest area of its area is open at the bottom towards the inside of the pack and only remains closed by its upper connecting web.
  • the purpose of this measure is that the package can only be opened because the opening takes place only by tearing off the upper connecting web.
  • the first layer consists of polyester stretched in the longitudinal direction of the opening strip
  • the second layer consists of a thermoplastic ionomer resin based on crosslinked ethylene copolymers
  • the third layer consists of PETG.
  • PETG has already been mentioned.
  • the aforementioned thermoplastic ionomer resin is sold under the trademark "SURLYN" by Du Pont.
  • SURLYN is a transparent plastic that is resistant to oils and fats for the packaging industry and is easy to weld.
  • FIG. 7 schematically show the closed or open liquid pack made of cardboard carrier material coated with plastic, with the longitudinal weld seam 1 and the double cardboard strip 2 with the individual walls 2 'and 2 ", in which the transverse weld seam 3 (FIG. 7) is arranged 7 shows the broken-off part of the material web 4 (the material is the cardboard coated on both sides with plastic), in which the dividing cut line 5 is shown inside the tube between two successive packs, which is why you can see at approximately the same distance from the dividing line 5 a further cross weld 3 ', which belongs to the bottom side of the next pack.
  • the opening device is generally designated 6, which only after the opening process according to Figure 2 is still partially present and consists of a double-sided, one-sided sealing opening strip 7, which is shown in broken lines in FIGS. 1 and 5, but is also at least partially shown in FIGS. 3, 4 and 6 to 8. This opening strip 7 is therefore explained in detail.
  • FIGS. 9 and 10 It is made from a plastic sheet 8 (FIGS. 9 and 10) and folded in a U-shape, as can be clearly seen from FIGS. 3, 4 and 8.
  • the U is open at the bottom, i.e. towards the inside of the packaging.
  • the upper connecting web 9 is the liquid-tight seal which connects the two legs 10, 10 'to one another. In the embodiment of FIG. 4, it is separated from the legs 10, 10 'by lines of weakness 11.
  • the opening strip 7 is connected on its outer sides along the sealing seams 3a and 3b to the inner sides of the double cardboard strip 2.
  • the opening strip 7 (seen in the direction of tearing) is welded to itself at the beginning and end, i.e. flat on its inner sides, whereby an initial sealing area 12 and an end sealing area 13 are formed.
  • first part 14 which forms the gripping tab, which is shown clearly protruding in several drawings.
  • the opening strip 7 is at the same time fastened in the longitudinal weld 1, in particular at the point 16 (FIG. 7) where the longitudinal weld 1 and the transverse weld 3 intersect.
  • the tear-open slot 17 which extends from the outside in front from the point 18 (FIG. 8) upwards to the end 19 near the upper connecting web 9. It penetrates the opening strip 7 completely, as can be seen on best results from Figure 8.
  • FIG. 7 A first embodiment can be seen in FIG. 7, in which the width of the double cardboard strip 2 is designated by "a", the upper edge of which is defined by the dash-dotted cut line 5. Less than this width "a” is the width or height "b" of the opening strip 7, which is shown in FIG. 7 with simple dashed lines in the first embodiment.
  • a second embodiment is shown with double dashed lines, in which this opening strip 7 has the width "c", which can be twice the width "b”. In this case it is the opening strip 7, which is provided protruding from the double cardboard strip 2 into the interior of the package.
  • the plastic web 8 of the opening strip 7 is pulled off a supply roll 20 shown in FIG. 9 and folded in a U-shape, as indicated at the right end of FIG. 9 in the initial state.
  • FIG. 10 If a section line is drawn along the line XX through FIG. 9, the structure of the plastic sheet 8 can be seen, as shown in FIG. 10.
  • a first layer 21 made of polyester stretched in the longitudinal direction 22, on the surface of which a second plastic layer 23 made of a thermoplastic ionomer resin based on crosslinked ethylene copolymers and on the side opposite to this in FIG. 10 (namely the lower side) a third layer 24 of PETG is laminated on.
  • the first layer 21 loses its sievability by stretching. This is not the case with the second and third plastic layers 23, 24, which is why the second 23 and third plastic layers 24 are more sealable than the first plastic layer.
  • the two outer layers 23 and 24 also differ from one another in that the second plastic layer 23 coming on the outside of the opening strip 7 according to FIG. 8 has a lower sealability temperature than the third plastic layer 24 has.
  • FIG. 11 is very schematized to clarify the individual layers and, for example, no sealing seams or pressed parts are visible.
  • the peculiarity of Figure 11 is that the end sealing area 13 is not at the front of the pouring tip 25 but only in the vicinity thereof, i.e. is arranged in the pouring area generally designated A.
  • the opening strip 7 is longer than, for example, in the embodiment of FIG. 1. According to FIG. 11, the strip 7 with the end sealing area 13 is pulled out above the pouring tip 25 to the right and is only attached there.
  • a paper 4 prepared with an opening strip 7 cannot be wound onto a supply roll because it would become too thick on one side. It is therefore preferred if the method described above begins in the area of a packaging machine or filling machine.
  • an aluminum foil can be welded onto one side of the paper web between the paper and the plastic coating, ie the polyethylene.
  • the sealing can take place according to the invention, preferably here by means of high frequency. The heat then arises in the aluminum foil and only softens the plastic in the vicinity of the irradiated area. Even in such a case, it is avoided that the opening strip 7 is sealed, for example, on its inner sides, as was deliberately carried out beforehand in the initial sealing area 12 and in the final sealing area 13 at a higher sealing temperature.
  • the opening strip is produced in such a way that the three plastic layers are first laminated onto one another and this layer structure is stretched overall, etc.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cartons (AREA)
  • Making Paper Articles (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Thermally Insulated Containers For Foods (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)

Abstract

Described is a liquid pack made at least partially of cardboard, having a longitudinal weld seam (1) and two transverse weld seams (3) which are disposed in a doubled cardboard strip (2) at the top and underside of the pack, wherein disposed in the upper transverse weld seam (3) is an opening means (6) in the form of a double-ply opening strip (7) which is liquid-tight on one side and whose outward sides are connected to the inward sides of the doubled cardboard strip (2). The opening strip (7) is made of a laminated plastics material in which one layer (21) is oriented in one direction (22). In order to permit such a pack to be produced from a tubular portion, and yet have a tearing-open action which the final consumer can readily understand, in an economical fashion and with good hygenic properties, the opening strip (7) is of a U-shaped cross-section and is so arranged that the free ends of the limb portions (10, 10') of the U-shape are directed towards the interior of the pack, the limb portions of the U-shape are welded together only at the beginning and the end to provide a beginning sealing region (12) and an end sealing region (13), the beginning sealing region (12) provides a gripping tongue portion behind which it is sealed in the longitudinal sealing seam in the doubled cardboard strip, and the end sealing region (13) is also sealed in the cardboard strip in the pouring-out region of the opening means.

Description

Die Erfindung betrifft eine Packung für Flüssigkeiten aus mit Kunststoff beschichtetem Kartonträgermaterial, mit einer Längsschweißnaht und mindestens einer in einem doppelten Kartonstreifen an der Oberseite der Packung liegenden Querschweißnaht, in welcher eine Öffnungsvorrichtung in Form eines doppelt gelegten, einseitig dichten Öffnungsstreifens angeordnet ist, dessen Außenseiten mit den Innenseiten des doppelten Kartonstreifens verbunden sind und der aus einem laminierten Kunststoff besteht, dessen eine Schicht in Längsrichtung ausgerichtet ist.The invention relates to a pack for liquids made of plastic-coated cardboard carrier material, with a longitudinal weld seam and at least one transverse weld seam lying in a double cardboard strip on the top of the pack, in which an opening device is arranged in the form of a double-layered, one-sided sealed opening strip, the outer sides of which are arranged with are connected to the inside of the double cardboard strip and which consists of a laminated plastic, one layer of which is aligned in the longitudinal direction.

Es sind zahlreiche Flüssigkeitspackungen aus mit Kunststoff beschichtetem Papier, Karton oder dergleichen bekannt, beispielsweise in parallelepipedischer Form. Bei derartigen Flüssigkeitspackungen gibt es Längsschweißnähte, die sich über die Höhe der stehenden parallelepipedischen Packung erstrecken, und Querschweißnähte im Boden und/oder Oberwandbereich der Packung. Die übliche parallelepipedische Flüssigkeitspackung hat mindestens im oberen Bereich an gegenüberliegenden Seiten zwei Dreiecklappen, und der eingangs erwähnte doppelte Kartonstreifen erstreckt sich bei dieser bekannten Packung von der Spitze des einen Dreiecklappens bis zur Spitze des gegenüberliegenden anderen Dreiecklappens.Numerous liquid packs made of plastic, paper, cardboard or the like are known, for example in parallelepiped form. In the case of such liquid packs, there are longitudinal weld seams which extend over the height of the standing parallelepiped pack, and transverse weld seams in the bottom and / or top wall region of the pack. The usual parallelepipedic liquid pack has at least in the upper area on opposite sides two triangular lobes, and the double cardboard strip mentioned at the beginning extends in this known pack from the tip of one triangular tab to the tip of the opposite other triangular tab.

Zahlreiche Vorschläge für Öffnungseinrichtungen an derartigen Flüssigkeitspackungen sind teilweise überlegt und teilweise auch bereits in der Literatur beschrieben worden. Eine aus der DE-A-27 47352 bekannte Öffnungsvorrichtung besteht aus einem Teil eines Schlauches aus laminiertem Kunststoff, wobei die Achse des Schlauchteiles parallel zur Längsschweißnaht und folglich quer zur Querschweißnaht verläuft. Zur Verbesserung der Reißeigenschaften eines solchen laminierten Kunstztoffschlauches ist die eine Schicht in Reißrichtung ausgerichtet bzw. orientiert, und auf dieser Schicht ist außen, wo die Verbindung mit dem doppelten Kartonstreifen geschaffen werden muß, eine besser siegelfähige Kunststoffschicht auflaminiert. Damit der als Öffnungsvorrichtung dienende Schlauchteil aus Kunststoff verschlossen werden kann, muß entweder der Schlauchteil aus dem doppelten Kartonstreifen der Flüssigkeitspackung nach oben herausstehen, wodurch sich der Nachteil ergibt, daß eine solche Flüssigkeitzpackung nicht vom Schlauch hergestellt werden kann. Oder der Schlauchteil muß auf seiner dem inneren der Packungzugewandten Seite verschweißbar sein, weshalb die Bereiche geringerer Siegelfähigkeit besonders angeordnet, vorzugsweise zum Packungsinneren nach unten hin herausstehen müssen. Hierdurch ergibt sich der Nachteil, daß einerseits von außen zugängliche Taschen innerhalb des Schlauchteiles mit den damit verbundenen Hygieneproblemen gebildet werden und andererseits eine komplizierte Herstellung des Schlauchteiles den Einbau einer solchen Öffnungsvorrichtung unwirtschaftlich macht.Numerous proposals for opening devices on such liquid packs have been partly considered and some have already been described in the literature. An opening device known from DE-A-27 47352 consists of part of a hose made of laminated plastic, the axis of the hose part running parallel to the longitudinal weld seam and consequently transverse to the transverse weld seam. To improve the tear properties of such a laminated plastic tube, one layer is oriented or oriented in the tear direction, and on this layer, where the connection with the double cardboard strip must be made, a more sealable plastic layer is laminated on. So that the plastic tube part serving as the opening device can be closed, either the tube part must protrude upwards out of the double cardboard strip of the liquid pack, resulting in the disadvantage that such a liquid pack cannot be produced from the hose. Or the tube part must be weldable on its side facing the inside of the package, which is why the areas of lower sealability must be arranged in a special way, preferably protruding downwards towards the inside of the package. This has the disadvantage that, on the one hand, externally accessible pockets are formed within the hose part with the associated hygiene problems and, on the other hand, a complicated production of the hose part makes the installation of such an opening device uneconomical.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Packung für Flüssigkeiten der eingangs näher bezeichneten Art zu schaffen, bei deren Herstellung aus einem Schlauch eine für den Endverbraucher verständliche Aufreißtätigkeit bei einfacher und preiswert herstellbarer Öffnungsvorrichtung mit guten Hygieneeigenschaften ermöglicht wird.The invention is therefore based on the object of creating a pack for liquids of the type specified at the outset, the production of which from a hose enables the end user to understand the tearing action with a simple and inexpensive to produce opening device with good hygiene properties.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Öffnungsstreifen im Querschnitt U-förmig ausgebildet und derart angeordnet ist, daß die freien Enden der Schenkelauf das Innere der Packung zu gerichtet sind, die Schenkel des U nur am Anfang und Ende des Öffnungsstreifens zu einem Anfangs- und einem Endsiegelbereich zusammengeschweißt sind, der Anfangssiegelbereich mit einem ersten Teil eine aus dem doppelten Kartonstreifen herausstehende Greiflasche darstellt und mit einem zweiten Teil im Bereich der sich kreuzenden Längs- und Querschweißnaht in dem doppelten Kartonstreifen versiegelt ist und daß der Endsiegelbereich im Ausgießbereich der Öffnungsvorrichtung in dem doppelten Kartonstreifen versiegelt ist. Durch die neuartige Ausgestaltung und Anordnung des Öffnungsstreifens gemäß der Erfindung ist die Bildung von außen zugänglichen Taschen, in denen sich Verunreinigungen sammeln können, mit Vorteil ausgeschaltet. Der Endverbraucher erkennt sofort die aus dem doppelten Kartonstreifen herausstehende Greiflasche, die er zweifellos erfaßt und in der einzig möglichen Richtung, nämlich zur Ausgießseite der Öffnungsvorrichtung hin, hochreißt. Dabei stellt der Verbraucher mit Überraschung fest, daß nicht etwa der Öffnungsstreifen vom doppelten Kartonstreifen abgerissen wird, sondern daß sich der Öffnungsstreifen selbst oben, wo der Verbindungssteg die beiden Schenkel des U verbindet, öffnet. Dadurch sind eine verständlich Aufreißtätigkeit für den Endverbraucher und gute Hygieneeigenschaften gegeben. Außerdem ist die Anbringung des neuen Öffnungsstreifens, einschließlich Ausgestaltung und Herstellung, wirtschaftlich sehr sparsam für den Packungshersteller.This object is achieved in that the opening strip is U-shaped in cross section and is arranged such that the free ends of the legs are directed towards the inside of the package, the legs of the U only at the beginning and end of the opening strip to an initial and an end sealing area are welded together, the initial sealing area with a first part constitutes a gripping tab protruding from the double cardboard strip and is sealed with a second part in the area of the intersecting longitudinal and transverse weld seam in the double cardboard strip and that the end sealing area in the pouring area of the opening device in the double cardboard strip is sealed. The novel design and arrangement of the opening strip according to the invention advantageously eliminates the formation of pockets which are accessible from the outside and in which contaminants can collect. The end user immediately recognizes the gripping tab protruding from the double cardboard strip, which he undoubtedly grasps and in the only possible direction, namely to the pouring side of the opening device, tears up. The consumer is surprised to find that the opening strip is not torn off from the double cardboard strip, but that the opening strip opens itself at the top, where the connecting web connects the two legs of the U. As a result, there is understandable tearing activity for the end user and good hygiene properties. In addition, the attachment of the new opening strip, including design and manufacture, is economically very economical for the pack manufacturer.

Der Anfangssiegelbereich erhält seinen Namen daher, weil der Endverbraucher hier den Reißvorgang anfängt. Nur ein Teil dieses Bereiches bildet die Greiflasche, der andere zweite Teil bildet den vorderen Verschluß, während der Endsiegelbereich den hinteren Verschluß des Öffnungsstreifens mit dem doppelten Kartonstreifen bildet. Oben, d.h. nach außen hin, ist der Öffnungsstreifen - über seinen Verbindungssteg - geschlossen.The initial seal area gets its name because the end user starts the tearing process here. Only part of this area forms the gripping tab, the other second part forms the front closure, while the end sealing area forms the rear closure of the opening strip with the double cardboard strip. Above, i.e. to the outside, the opening strip - via its connecting web - is closed.

Der Endsiegelbereich muß nicht genau an der Spitze des Gießendes, also in der Spitze des doppelt gelegten Dreiecklappens einer parallelepipedischen Packung angeordnet sein, vielmehr kann sich erwünschtenfalls der Öffnungsstreifen mit Endsiegelbereich über die Stelle der Ausgießspitze hinaus umgefaltet verlängern, so daß er auch dann noch im Ausgießbereich verbleibt. Mit anderen Worten kann der Öffnungsstreifen dadurch kürzer oder längerausgebildet sein, und man kann das Anheften und Fixieren des Öffnungsstreifens an der Materialbahn beeinflussen, beispielsweise durch größere Flächen verstärken.The end sealing area does not have to be arranged exactly at the tip of the pouring end, i.e. in the tip of the doubled triangular flap of a parallelepipedic pack; if desired, the opening strip with the end sealing area can be folded over beyond the point of the pouring tip so that it is still in the pouring area remains. In other words, the opening strip can thereby be made shorter or longer, and the attachment and fixing of the opening strip to the material web can be influenced, for example, by reinforcing it by larger areas.

Zweckmäßig ist die Erfindung dadurch weiter ausgestaltet, daß an der Greiflasche von den unteren freien Schenkelenden ausgehend, sich schräg aufwärts in den Anfangssiegelbereich erstreckend, ein Aufreißschlitz den Öffnungsstreifen nahezu vollständig durchsetzt. Dieser Aufreißschlitz erleichtert den Öffnungsvorgang, weil die Anfangsreißstelle durch diesen Schlitz gesteuert an die richtige Position im Öffnungsstreifen gelegt wird bzw. das Aufreißen an der richtigen Stelle in der Nähe des oberen Verbindungssteges beginnt.The invention is expediently further developed in that, on the gripping flap, starting from the lower free leg ends and extending obliquely upward into the initial sealing region, a tear-open slot penetrates the opening strip almost completely. This tear-open slot facilitates the opening process because the starting tear point is controlled by this slot to be placed in the correct position in the opening strip or the tear-open begins at the correct point near the upper connecting web.

Deshalb ist es besonders vorteilhaft, wenn das Ende des Aufreißschlitzes nahe dem oberen Verbindungssteg der beiden Schenkel des Öffnungsstreifens vorgesehen ist. Beim unbedachten Hochreißen des Verbindungssteges durch den Endverbraucher beginnt das Einreißen im oberen Bereich des Öffnungsstreifens und damit auch des doppelten Kartonstreifens, und es wird ein seitliches Beginnen des Reißens und gegebenenfalls Zerstören des doppelten Kartonstreifens hierdurch besonders gut vermieden. Der Öffnungsstreifen wirdpraktisch nur längs seines eigenen oberen Verbindungssteges geöffnet.It is therefore particularly advantageous if the end of the tear-open slot is provided near the upper connecting web of the two legs of the opening strip. When the end web is ripped up carelessly by the end user, tearing begins in the upper area of the opening strip and thus also the double cardboard strip, and lateral tearing and possibly destruction of the double cardboard strip is thereby avoided particularly well. The opening strip is practically only opened along its own upper connecting web.

Wenn gemäß der Erfindung der Verbindungssteg des Öffnungsstreifens innerhalb der Außenkontur des doppelten Kartonstreifens angeordnet ist, kann man die Flüssigkeitspackung besonders gut aus einem Schlauch herstellen, weil die gefüllte Bahn in der Füllmaschine dann stets außerhalb des Öffnungsstreifens, und zwar unmittelbar außerhalb desselben, durchgeschnitten wird. Die Trennschnittlinie zwischen zwei innerhalb des Schlauches aufeinanderfolgenden Packungen liegt also unmittelbar außerhalb des Öffnungsstreifens, so daß dieser geschlossen bleibt und dennoch die Packung vereinzelt werden kann.If, according to the invention, the connecting web of the opening strip is arranged within the outer contour of the double cardboard strip, the liquid pack can be produced particularly well from a hose, because the filled web in the filling machine is then always cut outside the opening strip, directly outside of it. The dividing line between two packs in succession within the tube is thus directly outside the opening strip, so that it remains closed and the pack can nevertheless be separated.

Wenn aus bevorzugten Gründen ein breiterer Öffnungsstreifen verwendet werden soll, kann es auch günstig sein, wenn der Öffnungsstreifen aus dem doppelten Kartonstreifen heraus in das Innere der Packung hineinragt.If, for preferred reasons, a wider opening strip is to be used, it can also be advantageous if the opening strip projects out of the double cardboard strip into the interior of the package.

Beider Herstellung von Flüssigkeitspackungen aus einem Schlauch erfolgt in an sich bekannter Weise beidseitig neben der Schnittlinie das Abdichten des jeweiligen Endes der beiden voneinander zu trennenden Packungen, und die Anordnung des Öffnungsstreifens und sein Ansiegeln an der Materialbahn muß auf die Lage der jeweiligen Quersiegelnaht so abgestellt sein, daß keinerlei Undichtigkeiten zu befürchten sind. In diesem Sinne ist es besonders zweckmäßig, wenn sich der Anfangssiegelbereich über die ganze Breite des Öffnungsstreifens erstreckt. Der Schweißbereich des Öffnungsstreifens erstreckt sich also über die Längssiegelnaht-in das Packungsinnere hinein-hinaus, wodurch die Sicherheit gegeben ist, daß aus dem Inneren der Packung keine Flüssigkeit nach außen dringen kann, auch nicht, wenn der Aufreißschlitz vorgesehen ist.When producing liquid packs from a tube, the respective end of the two packs to be separated from one another is sealed on both sides in addition to the cutting line, and the arrangement of the opening strip and its sealing on the material web must be based on the position of the respective transverse sealing seam that no leaks are to be feared. In this sense, it is particularly expedient if the initial sealing area extends over the entire width of the opening strip. The welding area of the opening strip thus extends beyond the longitudinal sealing seam into the interior of the package, which ensures that no liquid can escape from the interior of the package, even if the tear-open slot is provided.

Zweckmäßig ist es ferner, wenn vorzugsweise vom Ende des Aufreißschlitzes ausgehend, im Abstand eines Reißstreifens voneinander zwei Schwächungslinien im Bereich des Verbindungssteges des Öffnungsstreifens längs desselben verlaufen. Diese Maßnahme gibt eine Vorzugsreißrichtung vor, wodurch das Aufreißen ohne Zutun des Endverbrauchers in die richtigen Bahnen gesteuert wird. Bei diesen Schwächungslinien kann es sich um verdünnte Bereiche oder dergleichen handeln, eine echte Perforation ist natürlich nicht möglich, denn die Schwächungslinien müssen flüssigkeitsdicht bleiben.It is also expedient if, preferably starting from the end of the tear-open slot, two weakening lines run at a distance from one tear strip from one another in the region of the connecting web of the opening strip along the same. This measure specifies a preferred direction of tearing, by means of which the tearing is steered in the correct paths without the end user's intervention. These lines of weakness can be thinned areas or the like, of course real perforation is not possible because the lines of weakness must remain liquid-tight.

Der Endsiegelbereich kann auch in enger Nachbarschaft der Ausgießspitze der Öffnungsvorrichtung angeschweißt sein, und der Öffnungsstreifen kann sich von der Greiflasche neben der Längssiegelnaht bis an die Ausgießspitze erstrecken. Es hat sich nämlich gezeigt, daß zur Einsparung von Material es im allgemeinen ausreicht, wenn der Öffnungsstreifen gerade so lang ausgebildet wird wie die Öffnung für das Ausgießen ist. Alternative Möglichkeiten zum Herumlegen des Öffnungsstreifens um die Ausgießspitze wurden oben erläutert.The end seal area can also be welded in close proximity to the pouring tip of the opening device, and the opening strip can extend from the gripping flap next to the longitudinal sealing seam to the pouring tip. It has been shown that it is generally sufficient to save material if the opening strip is made just as long as the opening for the pouring. Alternative ways to lay around of the opening strip around the pouring tip have been explained above.

Zweckmäßig ist es auch, wenn auf der Oberfläche einer in Längsrichtung des Öffnungsstreifens ausgerichteten ersten Kunststoffschicht eine zweite, besser wärmesiegelfähige Kunststoffschicht als die erste Schicht und auf der anderen, gegenüberliegenden Oberfläche der ersten Schicht eine dritte, ebenfalls besser wärmesiegelfähige Kunststoffschicht als die erste Schichtaufgebracht sind und wenn die Siegelfähigkeitstemperatur der zweiten Schicht niedriger als die der dritten Schicht ist. Ein solcher Kunststoffaufbau begünstigt das Ansiegeln des Öffnungsstreifens an die jeweilige innere Oberfläche des doppelten Kartonstreifens, ohne daß dadurch die Schenkel des Öffnungsstreifens innen auf sich selbst oder miteinander versiegelt würden. Andersausgedrückt wäre die Packung durch Hochreißen des oberen Verbindungssteges - wie vorgesehen - nicht zu öffnen, wenn der Öffnungsstreifen weiter unten vollständig verschlossen wäre. Die Materialkombination der einzelnen Kunststoffschichten schaltet derartige Probleme vollständig aus.It is also expedient if a second, better heat-sealable plastic layer than the first layer is applied to the surface of a first plastic layer aligned in the longitudinal direction of the opening strip, and a third, also better heat-sealable plastic layer than the first layer is applied to the other, opposite surface of the first layer, and if the sealability temperature of the second layer is lower than that of the third layer. Such a plastic structure favors the sealing of the opening strip to the respective inner surface of the double cardboard strip, without the legs of the opening strip being sealed to themselves or to one another on the inside. In other words, the package would not be able to be opened by tearing up the upper connecting web, as intended, if the opening strip was completely closed further down. The material combination of the individual plastic layers completely eliminates such problems.

Die Packung mit den vorstehend erwähnten Merkmalen ist gemäß einer weiteren Überlegung auch dadurch zu kennzeichnen, daß die erste Schicht aus in Längsrichtung des Öffnungsstreifens gerecktem Polyester, die zweite Schicht aus einem thermoplastischen Ionomerharz auf der Basis von vemetzten Ethylencopolymeren und die dritte Schicht aus PETG bestehen. Bei letzteren kann man beispielsweise cyclohexanmodifiziertes Polyester verwenden. Es hat sich nämlich gezeigt, daß auch beim Strecken eines solchen Materials dieses nicht kristallin wird und somit seine Wärmesiegelfähigkeit behält. Dadurch ist der Öffnungsstreifen gemäß der Erfindung besonders gut und einfach herstellbar und mit der Verpackung in zweckmäßiger Weise zu verbinden.According to a further consideration, the package with the features mentioned above is also to be characterized in that the first layer consists of polyester stretched in the longitudinal direction of the opening strip, the second layer consists of a thermoplastic ionomer resin based on crosslinked ethylene copolymers and the third layer consists of PETG. In the latter, for example, cyclohexane-modified polyester can be used. It has been shown that even when such a material is stretched, it does not become crystalline and thus retains its heat sealability. As a result, the opening strip according to the invention can be produced particularly well and easily and can be connected to the packaging in an expedient manner.

Die vorstehend erwähnte Aufgabe wird im Hinblick auf eine Herstellung einer Flüssigkeitspackung der eingangs genannten Art dadurch gelöst, daß die Kunststoffbahn des Öffnungsstreifens von einer Vorratsrolle abgezogen, gegebenenfalls doppelt gefaltet wird, der U-förmig gefaltete Öffnungsstreifen am Anfang und Ende unter Bildung von Anfangs- und Endsiegelbereichen auf seinen Innenseiten auf sich selbst verschweißt wird, auf seiner einen Außenseite registergerecht auf die die Innenseite der Packung bildende Seite der flachliegenden Materialbahn derart aufgesiegelt wird, daß ein eine Greiflasche bildender zweiter Teil des Anfangssiegelbereiches über die Schnittkante der Längsschweißnaht und senkrecht zu dieser herausragt, daß ferner die Materialbahn zu einem Tubus geformt, mit der Längsschweißnaht versehen, gefüllt und durch Querschweißen längs durch den Öffnungsstreifen verschlossen, vereinzelt und in die Endgestalt einer Packung geformt wird. Eine leistungsstarke und übersichtliche Herstellung ist durch diese Maßnahmen gegeben, weil eine kontinuierliche Produktion auch mit großer Stückzahl pro Zeiteinheit ermöglicht ist. Das Falten des Kunststoffilmes des Öffnungsstreifens in U-Form auf sich selbst und Verschweißen auf sich selbst erfolgt mit höherer Temperatur, denn vorzugsweise wird hier die oben erwähnte dritte Kunststoffschicht mit sich selbst verschweißt, wozu höhere Temperaturen als beim Erstellen der üblichen Längs-oder Querschweißnähte der Papierbahn erforderlich sind. Durch dieses Verschweißen des doppelt gefalteten Öffnungsstreifens auf sich selbst - und zwar nur in den Anfangs- und den Endsiegelbereichen - erreicht man eine Verfestigung und Versteifung dieser verschweißten Bereiche. Das kommt besonders der Greiflasche zugute, die besonders dann zweckmäßig zu handhaben ist, wenn sie fest und steif ausgebildet ist. Diese Eigenschaften ergeben sich aber von allein gerade durch dieses Herstellungsverfahren.The above-mentioned object is achieved with regard to the production of a liquid pack of the type mentioned in that the plastic web of the opening strip is pulled off a supply roll, if necessary is folded twice, the U-shaped opening strip at the beginning and end to form the start and end Final sealing areas are welded to themselves on their inner sides, sealed on one outside in register with the side of the flat-lying material web forming the inside of the pack such that a second part of the initial sealing area forming a gripping tab protrudes beyond the cut edge of the longitudinal weld seam and perpendicular to it, that the material web is also formed into a tube, provided with the longitudinal weld seam, filled and closed by cross-welding longitudinally through the opening strip, separated and shaped into the final shape of a pack. A powerful and These measures ensure clear production because continuous production is possible even with large quantities per unit of time. The folding of the plastic film of the opening strip in a U-shape on itself and welding on itself takes place at a higher temperature, because here the third plastic layer mentioned above is preferably welded to itself, which is why higher temperatures than when the usual longitudinal or transverse weld seams are created Paper web are required. By welding the double-folded opening strip to itself - and only in the initial and final sealing areas - this welded area is solidified and stiffened. This is particularly beneficial for the gripping tab, which is particularly useful when it is designed to be firm and rigid. However, these properties result naturally from this manufacturing process.

Das registergerechte Anheften des somit vorbereiteten Öffnungsstreifens auf die Innenseite der Packungsbahn ist technisch nicht schwierig, auch nicht mit der Bedingung, daß die Greiflasche über die Schnittkante der Bahn quer zu dieser hinaussteht. Die Längsrichtung des Öffnungsstreifens liegt also quer zur Schnittkante oder zur späteren Längssiegelnaht. Wenn nämlich die mit dem Öffnungsstreifen somit versehene Materialbahn dann zum Tubus geformt und über die Langsschweißnaht verschlossen wird, steht die Greiflasche aus dieser Längsschweißnaht heraus. Diedanach üblichen Schritte zur Erstellung der Packung sind an sich bekannt.The register-correct attachment of the opening strip thus prepared to the inside of the packaging web is not technically difficult, not even with the condition that the gripping tab projects beyond the cutting edge of the web transversely to the latter. The longitudinal direction of the opening strip is therefore transverse to the cutting edge or to the later longitudinal sealing seam. If the material web thus provided with the opening strip is then formed into a tube and closed via the longitudinal weld seam, the gripping tab protrudes from this longitudinal weld seam. The usual steps for creating the pack are known per se.

Es ist bei der Herstellung einer solchen Flüssigkeitspackung besonders günstig, wenn ferner vor oder nach dem Doppelfalten des Öffnungsstreifens sowie dem teilweisen Verschweißen desselben auf sichselbst ein Aufreißschlitz in den Anfangssiegelbereich eingebrachtwird. Über Lage und Anordnung dieses Aufreißschlitzes ist oben bereits geschrieben. Deshalb ist es erfindungsgemäß besonders zweckmäßig, wenn an der Greiflasche von den unteren freien Schenkelenden ausgehend, sich schräg aufwärts in den Anfangssiegelbereich erstreckend, ein Autreißschlitz, den Öffnungsstreifen nahezu vollständig durchsetzend, angebracht wird. Dabei sie wiederholt, daß der Aufreißschlitz sowohl vor dem Doppelfalten des Öffnungsstreifens als auch nach seinem Falten, dabei aber vor dem Verschweißen auf sich selbst oder auch danach eingebracht werden kann.In the production of such a liquid pack, it is particularly advantageous if, before or after the opening strip is double-folded and partially welded to it, a tear-open slot is introduced into the initial sealing area. The position and arrangement of this tear-open slot has already been written above. For this reason, it is particularly expedient according to the invention if, on the gripping tab, starting from the lower free leg ends and extending obliquely upward into the initial sealing area, a tear slit is made which almost completely penetrates the opening strip. In doing so, she repeats that the tear-open slot can be introduced both before the opening strip is folded twice and after it has been folded, but before it is welded onto itself or afterwards.

Der Öffnungsstreifen für eine Packung aus Flüssigkeiten aus mit Kunststoff beschichtetem Kartonträgermaterial, mit einer Längsschweißnaht und mindestens einer in einem doppelten Kartonstreifen an der Oberseite der Packung liegenden Querschweißnaht, in welcher eine Öffnungsvorrichtung in form eines doppelt gelegten, einseitig dichten Öffnungsstreifens angeordnet ist, der von einer von einer Rolle abgezogenen Kunststoffbahn gebildet ist, dessen Außenseiten mit den Innenseiten des doppelten Kartonstreifens verbunden sind und der aus einem laminierten Kunststoff besteht, dessen erste Schicht in Längsrichtung ausgerichtet ist, wobei auf einer Oberfläche der ersten Schicht eine zweite Kunststoffschicht, die besser wärmesiegelfähig ist als die erste Schicht, aufgebracht ist, ist erfindungsgemäß besonders dadurch gekennzeichnet, daß auf der der zweiten Schicht gegenüberliegenden Oberfläche der ersten Schicht eine dritte Kunststoffschicht, die ebenfalls besser wärmesiegelfähig ist als die erste Schicht, aufgebracht ist und daß die Siegelfähigkeitstemperatur derz weiten Schicht niedriger als die derdritten Schicht ist. Unter "Siegelfähigkeitstemperatur" wird hier diejenige Temperatur verstanden, bei welcher das Material siegelfähig ist bzw. wird. Es kann sich hier beispielsweise um die Schmelztemperatur bzw. um die Erweichungstemperatur handeln. Wichtig ist im Sinne der Erfindung, daß das Material bei dieser Temperatur gesiegelt werden kann.The opening strip for a package of liquids made of plastic-coated cardboard carrier material, with a longitudinal weld seam and at least one cross-weld seam in a double cardboard strip on the top of the package, in which an opening device is arranged in the form of a double-layered, one-sided sealing opening strip, which is arranged by a is formed from a roll peeled off plastic sheet, the outer sides are connected to the inner sides of the double cardboard strip and which consists of a laminated plastic, the first layer of which is oriented in the longitudinal direction, with a second plastic layer, which is more heat-sealable than the first layer, being applied to a surface of the first layer, is particularly advantageous according to the invention characterized in that a third plastic layer, which is also more heat-sealable than the first layer, is applied to the surface of the first layer opposite the second layer, and in that the sealability temperature of the second layer is lower than that of the third layer. “Sealability temperature” is understood here to mean the temperature at which the material is or becomes sealable. This can be, for example, the melting temperature or the softening temperature. It is important in the sense of the invention that the material can be sealed at this temperature.

Es wurde oben bereits angeschnitten, daß die sogenannte zweite Schicht mit der niedrigeren Siegelfähigkeitstemperatur als die dritte Schicht auf der Außenseite des doppelt gefalteten, fertigen Öffnungsstreifen zu liegen kommen muß. Der Sinn der Anordnung der zweiten Schicht außen am Öffnungsstreifen liegt darin, daß beim Zuschweißen der einzelnen Packungen und Vereinzeln voneinander dafür gesorgt wird, daß zwar der Öffnungsstreifen aus Kunststoff flüssigkeitsdicht am doppelten Kartonstreifen haftet, daß aber der Öffnungsstreifen selbst über den größten Bereich seiner Fläche nach unten zum Packungsinneren hin offen ist und nur durch seinen oberen Verbindungssteg geschlossen bleibt. Sinn dieser Maßnahme ist es, daß die Packung nur dann geöffnet werden kann, weil die Öffnung nur durch Abreißen des oberen Verbindungssteges erfolgt.It has already been mentioned above that the so-called second layer with the lower sealability temperature than the third layer must come to lie on the outside of the double-folded, finished opening strip. The purpose of the arrangement of the second layer on the outside of the opening strip is that when the individual packs and individual pieces are welded together, care is taken that the opening strip made of plastic adheres to the double cardboard strip in a liquid-tight manner, but that the opening strip itself extends over the largest area of its area is open at the bottom towards the inside of the pack and only remains closed by its upper connecting web. The purpose of this measure is that the package can only be opened because the opening takes place only by tearing off the upper connecting web.

Besonders günstig hat es sich für den Öffnungsstreifen erfindungsgemäß gezeigt, wenn die erste Schicht aus in Längsrichtung des Öffnungsstreifens gerecktem Polyester, die zweite Schicht aus einem thermoplastischen lonomerharz auf der Basis von vernetzten Ethylencopolymeren und die dritte Schicht aus PETG besteht. PETG wurde bereits erwähnt. Das erwähnte thermoplastische lonomerharz wird mit dem Warenzeichen "SURLYN" der Firma Du Pont vertrieben. Beispielsweise handelt es sich dabei um einen durchsichtigten, gegen Öle und Fette widerstandsfähigen Kunststoff für die Verpackungsindustrie, der gut schweißfähig ist.It has been found to be particularly advantageous for the opening strip if the first layer consists of polyester stretched in the longitudinal direction of the opening strip, the second layer consists of a thermoplastic ionomer resin based on crosslinked ethylene copolymers and the third layer consists of PETG. PETG has already been mentioned. The aforementioned thermoplastic ionomer resin is sold under the trademark "SURLYN" by Du Pont. For example, it is a transparent plastic that is resistant to oils and fats for the packaging industry and is easy to weld.

Weitere Vorteile und Anwendungsmöglichkeiten der vorliegenden Erfindung ergeben sich aus der folgenden Beschreibung bevorzugter Ausführungsbeispiele anhand der folgenden Zeichnungen. Es zeigen:

Figur 1
perspektivisch eine mit der erfindungsgemäßen Öffnungsvorrichtung versehene Flüssigkeitspackung, bei welcher die oberen, äußeren Dreiecklappen hochgestellt sind,
Figur 2
abgebrochen perspektivisch den linken Teil der geöffneten Packung, leicht von oben gesehen, wobei die Greiflasche und der obere Verbindungssteg abgerissen sind,
Figur 3
eine perspektivische, schematische und abgebrochene Schnittansicht längs der Linie III-III der Figur 1,
Figur 4
eine schematische perspektivische Ansicht des U-förmig gelegten Öffnungsstreifens, dessen oberer Verbindungssteg zur Hälfte hochgerissen ist, unter Darstellung von Schwächungslinien,
Figur 5
abgebrochen den Zustand der Materialbahn, wenn diese zum Tubus gelegt wird, damit die Längssiegelnaht erstellt werden kann,
Figur 6
ein abgebrochen gezeigtes Teilstück einer flachgelegten Materialbahn, bei welcher der U-förmig gefaltete Öffnungsstreifen plaziert und fixiert ist,
Figur 7
das rechte Ende des Öffnungsstreifens auf einem abgebrochenen Teil der Materialbahn in größerem Maßstab als in Figur 6,
Figur 8
perspektivisch und abgebrochen ein vereinzelter Öffnungsstreifen zwischen abgebrochenen Teilen der doppelt gelegten Kunststoffbahn,
Figur 9
die Kunststoffbahn, wie sie von der Vorratsrolle abgezogen und teilweise schon U-förmig gefaltet wird,
Figur 10
eine Schnittansicht der Kunststoffbahn entlang der Linie X-X in Figur 9 und
Figur 11
die Draufsicht auf den doppelten Kartonstreifen mit eingelegtem Öffnungsstreifen bei einer anderen Ausführungsform der Erfindung, bei welcher nämlich der Endsiegelbereich über die Ausgießspitze hinausgezogen und erst weiter hinten aufgesiegelt ist.
Further advantages and possible uses of the present invention result from the following description of preferred exemplary embodiments with reference to the following drawings. Show it:
Figure 1
in perspective a liquid pack provided with the opening device according to the invention, in which the upper, outer triangular lobes are raised,
Figure 2
perspective broken off the left part of the opened package, slightly seen from above, the gripping tab and the upper connecting web are torn off,
Figure 3
2 shows a perspective, schematic and broken sectional view along the line III-III of FIG. 1,
Figure 4
2 shows a schematic perspective view of the U-shaped opening strip, the upper connecting web of which has been torn in half, showing lines of weakness,
Figure 5
canceled the condition of the web of material when this is placed to the tube so that the longitudinal sealing seam can be created,
Figure 6
a broken-off section of a flat material web, in which the U-shaped opening strip is placed and fixed,
Figure 7
the right end of the opening strip on a broken-off part of the material web on a larger scale than in FIG. 6,
Figure 8
perspective and broken a single opening strip between broken parts of the double-layered plastic sheet,
Figure 9
the plastic web as it is pulled off the supply roll and in some cases already folded in a U-shape,
Figure 10
a sectional view of the plastic sheet along the line XX in Figure 9 and
Figure 11
the top view of the double cardboard strip with an inserted opening strip in another embodiment of the invention, in which the end sealing area is pulled out beyond the pouring tip and is only sealed further on.

In den Figuren 1 und 2 sieht man schematisch die geschlossene bzw. geöffnete Flüssigkeitspackung aus mit Kunststoff beschichtetem Kartonträgermaterial, mit der Längsschweißnaht 1 und dem doppelten Kartonstreifen 2 mit den Einzelwandungen 2' und 2", in welchem die Querschweißnaht 3 (Figur 7) angeordnet ist. In Figur 7 ist derjenige abgebrochene Teil der Materialbahn 4 gezeigt (das Material ist der beidseitig mit Kunststoff beschichtete Karton), bei welchem die Trennschnittlinie 5 innerhalb des Tubus zwischen zwei aufeinanderfolgenden Packungen gezeigt ist. Deshalb sieht man auch etwa in gleichem Abstand von der Trennlinie 5 eine weitere Querschweißnaht 3', welche zur Bodenseite der nächsten Packung gehört.1 and 2 schematically show the closed or open liquid pack made of cardboard carrier material coated with plastic, with the longitudinal weld seam 1 and the double cardboard strip 2 with the individual walls 2 'and 2 ", in which the transverse weld seam 3 (FIG. 7) is arranged 7 shows the broken-off part of the material web 4 (the material is the cardboard coated on both sides with plastic), in which the dividing cut line 5 is shown inside the tube between two successive packs, which is why you can see at approximately the same distance from the dividing line 5 a further cross weld 3 ', which belongs to the bottom side of the next pack.

In Figur 1 ist allgemein mit 6 die Öffnungsvorrichtung bezeichnet, die nach dem Öffnungsvorgang gemäß Figur 2 nur noch teilweise vorhanden ist und aus einem doppelt gelegten, einseitig dichten Öffnungsstreifen 7 besteht, der in den Figuren 1 und 5 gestrichelt dargestellt ist, wenigstens teilweise aber auch in den Figuren 3, 4 und 6 bis 8 dargestellt ist. Dieser Öffnungsstreifen 7 wird daher besonders ausführlich erläutert.In Figure 1, the opening device is generally designated 6, which only after the opening process according to Figure 2 is still partially present and consists of a double-sided, one-sided sealing opening strip 7, which is shown in broken lines in FIGS. 1 and 5, but is also at least partially shown in FIGS. 3, 4 and 6 to 8. This opening strip 7 is therefore explained in detail.

Er ist aus einer Kunststoffbahn 8 (Figuren 9 und 10) erstellt und U-förmig gefaltet, wie man deutlich aus den Figuren 3, 4 und 8 erkennt. Das U ist nach unten offen, d.h. zum Inneren der Verpackung hin. Der obere Verbindungssteg 9 ist der flüssigkeitsdichte Abschluß, welcher die beiden Schenkel 10, 10' miteinander verbindet. Bei der Ausführungsform der Figur 4 wird er durch Schwächungslinien 11 von den Schenkeln 10, 10' getrennt.It is made from a plastic sheet 8 (FIGS. 9 and 10) and folded in a U-shape, as can be clearly seen from FIGS. 3, 4 and 8. The U is open at the bottom, i.e. towards the inside of the packaging. The upper connecting web 9 is the liquid-tight seal which connects the two legs 10, 10 'to one another. In the embodiment of FIG. 4, it is separated from the legs 10, 10 'by lines of weakness 11.

Um die Packung flüssigkeitsdicht zu machen, ist der Öffnungsstreifen 7 auf seinen Außenseiten längs der Siegelnähte 3a und 3b mit den Innenseiten des doppelten Kartonstreifens 2 verbunden. Außerdem ist der Öffnungsstreifen 7 (in Reißrichtung gesehen) am Anfang und Ende auf sich selbst verschweißt, d.h. flächig auf seinen Innenseiten, wodurch ein Anfangssiegelbereich 12 und ein Endsiegelbereich 13 gebildet werden.In order to make the pack liquid-tight, the opening strip 7 is connected on its outer sides along the sealing seams 3a and 3b to the inner sides of the double cardboard strip 2. In addition, the opening strip 7 (seen in the direction of tearing) is welded to itself at the beginning and end, i.e. flat on its inner sides, whereby an initial sealing area 12 and an end sealing area 13 are formed.

Innerhalb des Anfangssiegelbereiches 12 gibt es einen ersten Teil 14, welcher die Greiflasche bildet, die in mehreren Zeichnungen deutlich herausstehend dargestellt ist. Über den zweiten Teil 15 ist der Öffnungsstreifen 7 zugleich in der Längsschweißnaht 1 befestigt, insbesondere an der Stelle 16 (Figur 7), wo sich die Längsschweißnaht 1 und die Querschweißnaht 3 kreuzen. Innerhalb des Anfangssiegelbereiches 12 erkennt man auch den Aufreißschlitz 17, der sich von außen vorn von der Stelle 18 (Figur 8) nach oben hinten bis zum Ende 19 in der Nähe des oberen Verbindungssteges 9 erstreckte Er durchsetzt dabei den Öffnungsstreifen 7 vollständig, wie sich am besten aus Figur 8 ergibt.Within the initial sealing area 12 there is a first part 14, which forms the gripping tab, which is shown clearly protruding in several drawings. Via the second part 15, the opening strip 7 is at the same time fastened in the longitudinal weld 1, in particular at the point 16 (FIG. 7) where the longitudinal weld 1 and the transverse weld 3 intersect. Within the initial sealing area 12, one can also see the tear-open slot 17, which extends from the outside in front from the point 18 (FIG. 8) upwards to the end 19 near the upper connecting web 9. It penetrates the opening strip 7 completely, as can be seen on best results from Figure 8.

Aus Figur 7 erkennt man eine erste Ausführungsform, bei welcher mit "a" die Breite des doppelten Kartonstreifens 2 bezeichnet ist, dessen Oberkante durch die strichpunktierte Schnittlinie 5 definiert wird. Kleiner als diese Breite "a" ist die Breite oder Höhe "b" des Öffnungsstreifens 7, der in Figur 7 mit einfachen gestrichelten Linien bei der ersten Ausführungsform dargestellt ist. In der gleichen Figur 7 ist mit doppeltliegenden gestrichelten Linien eine zweite Ausführungsform gezeigt, bei welcher eben dieser Öffnungsstreifen 7 die Breite "c" hat, die das Doppelte der Breite "b" betragen kann. In diesem Falle handelt es sich um den Öffnungsstreifen 7, welcher aus dem doppelten Kartonstreifen 2 heraus in das Innere der Packung hineinragend vorgesehen ist.A first embodiment can be seen in FIG. 7, in which the width of the double cardboard strip 2 is designated by "a", the upper edge of which is defined by the dash-dotted cut line 5. Less than this width "a" is the width or height "b" of the opening strip 7, which is shown in FIG. 7 with simple dashed lines in the first embodiment. In the same FIG. 7, a second embodiment is shown with double dashed lines, in which this opening strip 7 has the width "c", which can be twice the width "b". In this case it is the opening strip 7, which is provided protruding from the double cardboard strip 2 into the interior of the package.

Bei der Herstellung wird die Kunststoffbahn 8 des Öffnungsstreifens 7 von einer in Figur 9 gezeigten Vorratsrolle 20 abgezogen und U-förmig gefaltet, wie am rechten Ende der Figur 9 bereits im Anfangszustand angedeutet ist.During manufacture, the plastic web 8 of the opening strip 7 is pulled off a supply roll 20 shown in FIG. 9 and folded in a U-shape, as indicated at the right end of FIG. 9 in the initial state.

Legt man eine Schnittlinie gemäß der Linie X-X durch Figur 9, dann sieht man den Aufbau der Kunststoffbahn 8, wie in Figur 10 gezeigt ist. Man hat hier eine erste Schicht 21 aus in Längsrichtung 22 gerecktem Polyester, auf dessen einer Oberfläche eine zweite Kunststoffschicht 23 aus einem thermoplastischen Ionomer-Harz auf der Basis von vernetzten Ethylencopolymeren und auf der dieser in Figur 10 oben liegenden Seite gegenüberliegenden (nämlich unteren) Seite eine dritte Schicht 24 aus PETG auflaminiert ist. Die erste Schicht 21 verliert ihre Siegefähigkeit durch das Recken. Dies ist bei der zweiten und dritten Kunststoffschicht 23, 24 nicht der Fall, weshalb die zweite 23 und dritte Kunststoffschicht 24 besser siegelfähiger als die erste Kunststoffschicht sind. Die beiden äußeren Schichten 23 und 24 unterscheiden sich außerdem dadurch voneinander, daß die auf dem Öffnungsstreifen 7 gemäß Figur 8 außen zu liegen kommende zweite Kunststoffschicht 23 eine niedrigere Siegelfähigkeitstemperatur als die dritte Kunststoffschicht 24 hat.If a section line is drawn along the line XX through FIG. 9, the structure of the plastic sheet 8 can be seen, as shown in FIG. 10. Here there is a first layer 21 made of polyester stretched in the longitudinal direction 22, on the surface of which a second plastic layer 23 made of a thermoplastic ionomer resin based on crosslinked ethylene copolymers and on the side opposite to this in FIG. 10 (namely the lower side) a third layer 24 of PETG is laminated on. The first layer 21 loses its sievability by stretching. This is not the case with the second and third plastic layers 23, 24, which is why the second 23 and third plastic layers 24 are more sealable than the first plastic layer. The two outer layers 23 and 24 also differ from one another in that the second plastic layer 23 coming on the outside of the opening strip 7 according to FIG. 8 has a lower sealability temperature than the third plastic layer 24 has.

In den Figuren 2 und 11 erkennt man die Ausgießspitze 25, wobei Figur 11 zur Verdeutlichung der einzelnen Schichten stark schematisiert ist und beispielsweise keinerlei Siegelnähte oder aufeinandergedrückte Teile zu sehen sind. Hierdurch ist es möglich, den Öffnungsstreifen 7 mit der Greiflasche 14 und dem Endsiegelbereich 13 darzustellen, die anderenfalls bei der Enge der Linien unsichtbar würden. Die Besonderheit der Figur 11 besteht darin, daß der Endsiegelbereich 13 nicht vorn an der Ausgießspitze 25 sondern lediglich in dessen Nähe, d.h. im allgemein mit A bezeichneten Ausgießbereich angeordnet ist. Bei der Ausführungsform der Figur 11 ist der Öffnungsstreifen 7 länger als beispielsweise bei der Ausführungsform der Figur 1. Gemäß Figur 11 ist nämlich der Streifen 7 mit dem Endsiegelbereich 13 über die Ausgießspitze 25 nach rechts oben hinausgezogen und erst dort befestigt.The pouring tip 25 can be seen in FIGS. 2 and 11, FIG. 11 being very schematized to clarify the individual layers and, for example, no sealing seams or pressed parts are visible. This makes it possible to display the opening strip 7 with the gripping tab 14 and the end sealing area 13, which would otherwise become invisible if the lines were narrow. The peculiarity of Figure 11 is that the end sealing area 13 is not at the front of the pouring tip 25 but only in the vicinity thereof, i.e. is arranged in the pouring area generally designated A. In the embodiment of FIG. 11, the opening strip 7 is longer than, for example, in the embodiment of FIG. 1. According to FIG. 11, the strip 7 with the end sealing area 13 is pulled out above the pouring tip 25 to the right and is only attached there.

Im allgemeinen ist ein mit einem Öffnungsstreifen 7 präpariertes Papier 4 nicht auf eine Vorratsrolle aufzuwickeln, weil es einseitig zu dick würde. Deshalb ist es bevorzugt, wenn das oben beschriebene Verfahren im Bereich einer Pakkungsherstellungsmaschine oder Füllmaschine beginnt.In general, a paper 4 prepared with an opening strip 7 cannot be wound onto a supply roll because it would become too thick on one side. It is therefore preferred if the method described above begins in the area of a packaging machine or filling machine.

Bei der Verpackung von speziellen Flüssigkeiten, wie z.B. H-Milch oder Fruchtsaft, kann auf einer Seite der Papierbahn zwischen dem Papier und der Kunststoffbeschichtung, d.h. dem Polyethylen, eine Aluminiumfolie aufgeschweißt sein. Auch in diesem Falle kann das Versiegeln erfindungsgemäß erfolgen, vorzugsweise hier mittels Hochfrequenz. Die Wärme entsteht dann in der Aluminiumfolie und erweicht nur den in der Nachbarschaft der bestrahlten Stelle befindlichen Kunststoff. Auch in einem solchen Falle ist vermieden, daß sich der Öffnungsstreifen 7 etwa auf seinen Innenseiten versiegelt wird, wie dies bewußt zuvor im Anfangssiegelbereich 12 und im Endsiegelbereich 13 bei höherer Siegeltemperatur durchgeführt wurde.When packaging special liquids, such as UHT milk or fruit juice, an aluminum foil can be welded onto one side of the paper web between the paper and the plastic coating, ie the polyethylene. In this case too, the sealing can take place according to the invention, preferably here by means of high frequency. The heat then arises in the aluminum foil and only softens the plastic in the vicinity of the irradiated area. Even in such a case, it is avoided that the opening strip 7 is sealed, for example, on its inner sides, as was deliberately carried out beforehand in the initial sealing area 12 and in the final sealing area 13 at a higher sealing temperature.

Der Öffnungsstreifen wird so hergestellt, daß zuerst die drei Kunststoffschichten aufeinanderlaminiert werden und dieser Schichtaufbau insgesamt gereckt wird usw.The opening strip is produced in such a way that the three plastic layers are first laminated onto one another and this layer structure is stretched overall, etc.

Claims (15)

  1. A pack for liquids comprising plastics-coated cardboard backing material, having a longitudinal welded seam (1) and at least one transverse welded seam (3) which is disposed in a doubled cardboard strip (2) at the top side of the pack and in which there is arranged an opening bans (6) in the form of an opening strip (7) which is laid double and which is sealing on one side and the outsides of which are joined to the insides of the doubled cardboard strip (2) and which comprises a laminated plastics of which one layer (21) is oriented in the longitudinal direction (22), characterised in that the opening strip (7) is of U-shaped cross-section and is so arranged that the free ends of the limbs (10, 10') are directed towards the interior of the pack, the limbs (10, 10') of the U-shape are welded together only at the beginning and the end of the opening strip (7) to provide an initial (12) and a terminal sealing region (13), the initial sealing region (12) with a first portion (14) represents a gripping strip portion (14) which projects out of the doubled cardboard strip (2) and with a second portion (15) is sealed in the region (16) of the mutually intersecting longitudinal (1) and transverse welded seams (3) in the doubled cardboard strip (2), and that the terminal sealing region (13) is sealed in the pouring-out region (A) of the opening means (6) in the doubled cardboard strip (2).
  2. A pack according to claim 1 characterised in that, on the gripping strip portion, starting from the lower free ends of the limbs and extending inclinedly upwardly into the initial sealing region (12), a tear-open slot (17) passes almost completely through the opening strip (7).
  3. A pack according to claim 2 characterised in that the end (19) of the tear-open slot (17) is disposed near the upper connecting web portion (9) of the two limbs (10, 10') of the opening strip (7).
  4. A pack according to one of claims 1 to 3 characterised in that the connecting web portion (9) of the opening strip (7) is arranged within the outside contour of the doubled cardboard strip (2).
  5. A pack according to one of claims 1 to 4 characterised in that the opening strip (7) projects out of the doubled cardboard strip (2) into the interior of the pack (Figure 7).
  6. A pack according to one of claims 1 to 5 characterised in that the initial sealing region (12) extends over the entire width (b; c) of the opening strip (7).
  7. A pack according to one of claims 1 to 6 characterised in that, preferably starting from the end (19) of the tear-open slot (17), two weakening lines (11) extend at the spacing of a tearing strip from each other in the region of the connecting web portion (9) of the opening strip (7) along same (7).
  8. A pack according to one of claims 1 to 7 characterised in that the terminal sealing region (13) is welded in position in the close vicinity of the pouring tip (25) of the opening means (6) and the opening strip (7) extends from the gripping strip portion (14) beside the longitudinal welded seam (1) to the pouring tip (25).
  9. A pack according to one of claims 1 to 8 characterised in that provided on the surface of a first plastics layer (21) which is oriented in the longitudinal direction (22) of the opening strip (7) is a second plastics layer (23) which is better sealable than the first layer (21) and disposed on the other, oppositely disposed surface of the first layer (21) is a third plastics layer (24) which is also better heat-sealable than the first layer (21), and that the sealability temperature of the second layer (23) is lower than that of the third layer (24).
  10. A pack according to claim 9 characterised in that the first layer (21) comprises polyester which is elongated in the longitudinal direction (22) of the opening strip (7), the second layer (23) comprises a thermoplastic ionomer resin based on cross-linked ethylene copolymers and the third layer (24) comprises PETG.
  11. A process for the production of a liquid pack comprising plastics-coated cardboard backing material, comprising a longitudinal welded seam (1) and at least one transverse welded seam (3) which is disposed in a doubled cardboard strip (2) at the top side of the pack and in which there is arranged an opening means (6) in the form of an opening strip (7) which is laid double and which is sealing on one side and the outsides of which are joined to the insides of the doubled cardboard strip (2), wherein the opening strip comprises a laminated plastics of which one layer (21) is oriented in the longitudinal direction (22), characterised in that the plastics web (8) of the opening strip (7) is drawn off a supply roll (20), possibly folded double, the opening strip (7) which is folded in a U-shape is welded on to itself on its insides at the beginning and the end to form initial (12) and terminal sealing regions (3), and on its one outward side is sealed in proper register relationship on to the side, which forms the inside of the pack, of the web of material (4) which is lying in a flat condition, in such a way that a second portion of the initial sealing region (12), which forms a gripping strip portion (14), projects beyond the cut edge (35) of the longitudinal welded seam (1) and perpendicularly thereto, that in addition the web of material (4) is formed into a tube, provided with the longitudinal welded seam (1), filled and closed by transverse welding lengthwise through the opening strip (7), separated, and shaped into the final configuration of a pack.
  12. A production process according to claim 11 characterised in that, prior to or after the operation of double folding of the opening strip (7) and partial welding thereof on to itself, a tear-open slot (17) is produced in the initial sealing region (12).
  13. A production process according to claim 12 characterised in that a tear-open slot (17) which almost completely passes through the opening strip (7) is produced on the gripping strip portion (14), starting from the lower free ends of the limbs and extending inclinedly upwardly into the initial sealing region (12).
  14. An opening strip (7) for a pack for liquids comprising plastics-coated cardboard backing material, comprising a longitudinal welded seam (1) and at least one transverse welded seam (3) which is disposed in a doubled cardboard strip (2) at the top side of the pack and in which there is arranged an opening means (6) in the form of an opening strip (7) which is laid double and which is sealing at one side and which is formed by a plastics web (8) which is drawn from a roll and the outsides of which are joined to the insides of the doubled cardboard strip (2) and which comprises a laminated plastics of which a first layer (21) is oriented in the longitudinal direction (22), wherein provided on a surface of the first layer (21) is a second plastics layer (23) which is better heat-sealable than the first layer (21), characterised in that provided on the surface of the first layer (21), which is opposite to the second layer, is a third plastics layer (24) which is also better heat-sealable than the first layer (21), and that the sealability temperature of the second layer (23) is lower than that of the third layer (24).
  15. An opening strip according to claim 14 characterised in that the first layer (21) comprises polyester which is elongated in the longitudinal direction (22) of the opening strip (7), the second layer (23) comprises a thermoplastic ionomer resin based on cross-linked ethylene copolymers and the third layer (24) comprises PETG.
EP87105546A 1986-04-28 1987-04-14 Liquid package, method for making it and plastic web for making it Expired - Lifetime EP0244674B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87105546T ATE77798T1 (en) 1986-04-28 1987-04-14 LIQUID PACK, MANUFACTURE OF THE SAME AND PLASTIC SHEET FOR MAKING THE LIQUID PACK.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8610324A GB2189772B (en) 1986-04-28 1986-04-28 A liquid pack and method of manufacture thereof
GB8610324 1986-04-28

Publications (3)

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EP0244674A2 EP0244674A2 (en) 1987-11-11
EP0244674A3 EP0244674A3 (en) 1989-03-15
EP0244674B1 true EP0244674B1 (en) 1992-07-01

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US (1) US4787507A (en)
EP (1) EP0244674B1 (en)
JP (1) JP2523318B2 (en)
AT (1) ATE77798T1 (en)
AU (1) AU598535B2 (en)
CA (1) CA1276922C (en)
DE (1) DE3780074D1 (en)
ES (1) ES2033254T3 (en)
GB (1) GB2189772B (en)

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SE508001C2 (en) * 1992-07-02 1998-08-10 Tetra Laval Holdings & Finance Opening device for packaging containers
EP0708000A3 (en) * 1994-10-21 1996-08-14 Hoover Universal Seat cushion trim cover
EP1275588A1 (en) * 2001-07-12 2003-01-15 Tetra Laval Holdings & Finance SA Gable-top package for pourable food products
EP1584563A1 (en) * 2004-04-09 2005-10-12 Tetra Laval Holdings & Finance S.A. Gable-top package for pourable food products and method for dimensioning thereof
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JP2018501165A (en) * 2014-12-22 2018-01-18 テトラ ラバル ホールディングス アンド ファイナンス エス エイ Packaging material and packaging container formed of the packaging material
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Publication number Publication date
ES2033254T3 (en) 1993-03-16
AU598535B2 (en) 1990-06-28
CA1276922C (en) 1990-11-27
AU7193487A (en) 1987-10-29
ATE77798T1 (en) 1992-07-15
EP0244674A2 (en) 1987-11-11
DE3780074D1 (en) 1992-08-06
GB2189772B (en) 1989-12-13
US4787507A (en) 1988-11-29
GB8610324D0 (en) 1986-06-04
JP2523318B2 (en) 1996-08-07
GB2189772A (en) 1987-11-04
JPS62260648A (en) 1987-11-12
EP0244674A3 (en) 1989-03-15

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