EP0379934B1 - Easy to open package - Google Patents

Easy to open package Download PDF

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Publication number
EP0379934B1
EP0379934B1 EP90100810A EP90100810A EP0379934B1 EP 0379934 B1 EP0379934 B1 EP 0379934B1 EP 90100810 A EP90100810 A EP 90100810A EP 90100810 A EP90100810 A EP 90100810A EP 0379934 B1 EP0379934 B1 EP 0379934B1
Authority
EP
European Patent Office
Prior art keywords
line
region
packaging
intersection
sealing
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
EP90100810A
Other languages
German (de)
French (fr)
Other versions
EP0379934A1 (en
Inventor
Georg Dr. Bolte
Dieter Heinecke
Günter Hexel
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.)
Ardagh Metal Packaging Germany GmbH
Original Assignee
Schmalback Lubeca AG
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 Schmalback Lubeca AG filed Critical Schmalback Lubeca AG
Publication of EP0379934A1 publication Critical patent/EP0379934A1/en
Application granted granted Critical
Publication of EP0379934B1 publication Critical patent/EP0379934B1/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
    • B65D77/10—Container closures formed after filling
    • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
    • B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
    • B65D77/2028—Means for opening the cover other than, or in addition to, a pull tab
    • B65D77/2032—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container
    • B65D77/2044—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure
    • B65D77/2048—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure whereby part of the container or cover has been weakened, e.g. perforated or precut
    • B65D77/2056—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure whereby part of the container or cover has been weakened, e.g. perforated or precut the cover being weakened
    • 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
    • B65D77/10—Container closures formed after filling
    • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
    • B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
    • B65D77/2028—Means for opening the cover other than, or in addition to, a pull tab
    • B65D77/2032—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container
    • B65D77/2044—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure
    • 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
    • B65D2577/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks, bags
    • B65D2577/10—Container closures formed after filling
    • B65D2577/20—Container closures formed after filling by applying separate lids or covers
    • B65D2577/2025—Multi-layered container, e.g. laminated, coated
    • B65D2577/2033—Multi-layered container, e.g. laminated, coated with one or more layers of container being torn off upon initial opening
    • 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
    • B65D2577/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks, bags
    • B65D2577/10—Container closures formed after filling
    • B65D2577/20—Container closures formed after filling by applying separate lids or covers
    • B65D2577/2041—Pull tabs
    • B65D2577/205—Pull tabs integral with the closure
    • 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
    • B65D2577/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks, bags
    • B65D2577/10—Container closures formed after filling
    • B65D2577/20—Container closures formed after filling by applying separate lids or covers
    • B65D2577/2075—Lines of weakness or apertures
    • B65D2577/2083—Lines of weakness or apertures in container flange
    • 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
    • B65D2577/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks, bags
    • B65D2577/10—Container closures formed after filling
    • B65D2577/20—Container closures formed after filling by applying separate lids or covers
    • B65D2577/2075—Lines of weakness or apertures
    • B65D2577/2091—Lines of weakness or apertures in cover
    • 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
    • Y10S229/00—Envelopes, wrappers, and paperboard boxes
    • Y10S229/924—Means to facilitate gripping a tear strip

Definitions

  • the invention relates to an easy-to-open single or multi-chamber packaging with the features of the preamble of claim 1.
  • Such an easy-to-open packaging is known from DE-A-36 13 155.
  • the cover part has a grip section projecting beyond the edge flange of the lower part. With this, the cover part can be pulled off the lower part.
  • the arrangement is such that the adhesion between the layers of the lower part and the cover part connected by seals is so great along the edge flange that the sealing cannot normally be broken by the tensile forces acting on the grip tab for opening.
  • the composite material of the cover part is designed so that the internal adhesive force between the layers of the composite material is significantly less than the aforementioned seal adhesive force.
  • the known packaging described ensures on the one hand a firm and tight connection between the cover part and the lower part. On the other hand, it requires little Opening force compared to packaging in which the adhesive force of the sealing line must be overcome to open. However, practice has shown that even with this packaging considerable forces are still required to open the packaging, since the lid part has to be peeled off over the entire length of the sealing line.
  • the invention has for its object to develop an easy-to-open single or multi-chamber packaging with the features of the preamble of claim 1 so that the opening process is still much easier without affecting the tight and hermetic seal of the sealed packaging and so for children or women can run without difficulty.
  • the lower part and the cover part no longer need to be separated from one another along the sealing zone of the edge flange. Rather, the lower part and the cover part remain firmly connected to one another in this area. Rather, to open the cover part is cut along a line of weakness, which is provided within the sealing zone in the cover material.
  • this weakening line is designed in accordance with the aforementioned German Offenlegungsschrift 36 13 155 in such a way that it ensures that the cover part is completely torn along the weakening line and under the effect of the tensile force acting on the grip tab.
  • This line of weakness also extends in alignment with the two side edges of the grip tab.
  • the line of weakness thus delimits the region of the cover part that can be torn off, including the grip tab connected in one piece with it.
  • the scoring line provided in addition to the weakening line in the part of the packaging consisting of a multilayer composite film encloses the intersection area between the sealing zone and the grip tab. This additional scratch line is arranged and designed so that in the area enclosed by the scoring line when opening the packaging and when pulling on the grip tab, a layer area of the composite film belonging to the sealing zone peels off from the other layers of the associated composite material. To open it, only this narrowly delimited film area needs to be peeled off, while the actual opening of the packaging takes place along the weakening line that tears open.
  • the handle tab can thus be separated from the sealing zone area with relatively little force, so that the forces required for tearing along the weakening line can then be easily applied via this area. At the same time, a hermetic seal is ensured in the defined intersection area by high sealing adhesive forces.
  • the same design as is provided for the crossing area of the grip tab with the sealing zone running along the edge flange of the lower part can also be provided for the crossing area of the grip tab with the sealing connection arranged along a separating web of the lower part of a multi-chamber packaging.
  • the additional score line can be provided in the edge flange of the lower part made of the composite film or, with particular advantage, on the underside of the cover part made of the composite film. In the latter case, the line of weakness delimiting the tear-open area of the cover part is introduced into the cover part from the top thereof.
  • the advantage of this design lies in the fact that all weakening and scoring lines are only provided in the cover part and can therefore be incorporated into it in a single work step, which significantly simplifies production.
  • the packaging according to FIGS. 1 to 5 comprises a cover part 60 made of a film material which, for example, comprises an outer metal, eg aluminum film 66 and a sealable plastic layer 67 on the underside thereof.
  • a tear-open area is delimited at a distance from the edge of the cover part by a circumferential line of weakness 64. In the area of a corner of the approximately square lid part, the tear-open part is integrally connected to a grip tab 65 projecting over the edge of the lid part.
  • the cover part 60 can be flat, as shown, or can be profiled in the desired manner.
  • the cover film can also carry an outer layer of lacquer or the like, which is used for labeling or otherwise designing the outer surface of the cover.
  • the cover part 60 is firmly and sealingly connected to the edge flange 62 of a lower part 61, for example by gluing, welding or cold or heat sealing in a surface area which is oriented along a circumferential sealing line 63.
  • the lower part is made of a composite film. This consists, for example, of three layers, namely an outer metal foil 73, a middle plastic layer 72 and an inner plastic layer made of weldable or sealable material.
  • the middle layer 72 is selected such that the sealing layer 71 and the middle layer 72 can be delaminated from one another by peeling off under certain forces.
  • Such composite films are known, for example, from DE-OS 36 13 155 mentioned at the beginning.
  • the outer aluminum layer 73 can also carry an outer protective lacquer layer.
  • an additional weakening line or scoring 70 is provided in the corner region of the edge flange 62 of the lower part, on which the grip tab 65 of the cover part projects beyond the packaging, which is shown in more detail in detail 69 according to FIG is.
  • the scoring 70 encloses the sealing line 63 in the corner region and is only interrupted when the sealing line is crossed.
  • the extent of the area delimited by the scoring 70 along the sealing line 63 is determined by the width of the grip tab 65 in the area of intersection with the edge flange 62.
  • the arrangement is such that the adhesive force along the sealing line 63 is greater than the adhesive force between the layers 71 and 62 of the lower part.
  • the area of the layer 71 which is narrowly delimited by the scoring 70 remains firmly connected to the cover part 60 via the sealing line 63 and peels off Edge of the lower part 61, so that the grip tab can be easily detached from the lower part and then initiates the intended tearing of the cover part by introducing the tear force into the weakening line 64.
  • the cover part 75 is made from a composite film. This can consist, for example, of an aluminum foil 84 with an outer protective lacquer layer 82, a delamination layer 85 and a heat seal layer 83.
  • the tear area is limited by a line of weakness 77 lying on the outside of the cover part.
  • the cover part 77 is sealed and firmly connected along the connecting or sealing line 76 to the edge flange 81 of the lower part 80.
  • the cover part has a grip tab 78 which projects beyond the edge flange 81 of the lower part.
  • essentially self-contained scratching 86 is provided on the underside of the cover part, which concerns the sealing layer 83 and partly also the delamination layer 85.
  • the sealing layer 83 or the delamination layer 85 detaches from the layer 91 or breaks open under the force introduced by the grip tab 78.
  • the connection along the sealing line 76 remains intact between the edge 81 of the lower part and the cover part, while the grip tab 78 detaches from this edge and enables opening by tearing the weakening line 77.
  • the details in the intersection area are shown again in cross section and on a larger scale in FIG. 10. It can be seen that the delamination does not necessarily have to take place between the layer 83 and the layer 85. Rather, termination can also take place within layer 85, as indicated in FIG. 10 and already mentioned above.
  • the lower part can also consist of a composite foil, e.g. an aluminum foil 90 with a sealing layer 91.
  • the width of the sealing line is shown in a stronger line in the area of contact between the two parts.
  • the score 86 runs on both sides of the sealing line.
  • such a narrowly limited separation area between the cover part and the lower part can not only be provided in the edge flange of the lower part. If the lower part is divided into two or more chambers by webs or ribs, the cover part is also welded to the top of the separating webs along a sealing line.
  • a narrowly defined intersection area can be equipped with a peeling behavior in the manner described with reference to the figures. This can e.g. be useful in order to allow the opening process to pass from one chamber area to the other chamber area only over limited surface areas of the webs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Cartons (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)

Abstract

An easy-to-open package is provided, in which at least one part is made of a sandwich film with peel-off or break-out characteristics of certain layers of the sandwich film, the break-out or peel-off process being limited by an additional narrowly bounded notching (70; 86) to a region which is narrowly bounded in the longitudinal direction of the sealing line and is preferably assigned to the intersection region between a gripping tab (65; 78) from the lid material and the sealing line (63; 76). <IMAGE>

Description

Die Erfindung betrifft eine leicht zu öffnende Ein- oder Mehrkammer-Verpackung mit den Merkmalen des Oberbegriffs des Anspruchs 1.The invention relates to an easy-to-open single or multi-chamber packaging with the features of the preamble of claim 1.

Eine solche leicht zu öffnende Verpackung ist aus der DE-A-36 13 155 bekannt. Diese zeigt eine leicht zu öffnende Verpackung aus Kunststoff, bei der wenigstens der Deckelteil aus einer mehrschichtigen Verbundfolie besteht und mit dem Flanschbereich des Unterteils eine dichte Siegelverbindung bildet. Der Deckelteil weist einen über den Randflansch des Unterteils hinausragenden Griffabschnitt auf. Mit diesem kann der Deckelteil von dem Unterteil abgezogen werden. Die Anordnung ist im bekannten Falle so getroffen, daß entlang des Randflansches die Haftung zwischen den durch Siegeln verbundenen Schichten von Unterteil und Deckelteil so groß ist, daß die Siegelung durch die zum Öffnen an der Grifflasche zur Wirkung kommenden Zugkräfte normalerweise nicht aufgehoben werden kann. Auf der anderen Seite ist das Verbundmaterial des Deckelteils so ausgebildet, daß die innere Haftkraft zwischen den Schichten des Verbundmaterials deutlich geringer als die erwähnte Siegelhaftkraft ist. Die Folge ist, daß beim Ziehen an der Grifflasche zum Öffnen der Verpackung sich wenigstens die innere Schicht des Verbundmaterials des Deckelteils entlang der Siegellinie des Randflansches von den übrigen Schichten des Deckelteils abschält, wobei durch eine entlang der inneren Kante der Siegelzone verlaufende Kerblinie, welche nur die innere Schicht des Verbundmaterials durchdringt, sichergestellt ist, daß sich dieser Abschälvorgang entlang des Randflansches nur etwa auf die Breite der dem Randflansch folgenden Siegelzone beschränkt (vgl. auch das deutsche Gebrauchsmuster 69 01 362).Such an easy-to-open packaging is known from DE-A-36 13 155. This shows an easy-to-open packaging made of plastic, in which at least the cover part consists of a multi-layer composite film and forms a sealed seal connection with the flange area of the lower part. The cover part has a grip section projecting beyond the edge flange of the lower part. With this, the cover part can be pulled off the lower part. In the known case, the arrangement is such that the adhesion between the layers of the lower part and the cover part connected by seals is so great along the edge flange that the sealing cannot normally be broken by the tensile forces acting on the grip tab for opening. On the other hand, the composite material of the cover part is designed so that the internal adhesive force between the layers of the composite material is significantly less than the aforementioned seal adhesive force. The result is that when the pull tab is opened to open the packaging, at least the inner layer of the composite material of the lid part peels off from the remaining layers of the lid part along the sealing line of the edge flange, with a notch line running along the inner edge of the sealing zone which only penetrates the inner layer of the composite material, it is ensured that this peeling process along the edge flange is only limited to the width of the sealing zone following the edge flange (cf. also German utility model 69 01 362).

Die beschriebene bekannte Verpackung gewährleistet einerseits eine feste und dichte Verbindung zwischen Deckelteil und Unterteil. Auf der anderen Seite erfordert sie eine nur geringe Öffnungskraft im Vergleich zu Verpackungen, bei denen zum Öffnen die Haftkraft der Siegellinie überwunden werden muß. Die Praxis hat jedoch gezeigt, daß auch bei dieser Verpackung noch erhebliche Kräfte erforderlich sind, um die Verpackung zu öffnen, da der Deckelteil über die ganze Länge der Siegellinie abgeschält werden muß.The known packaging described ensures on the one hand a firm and tight connection between the cover part and the lower part. On the other hand, it requires little Opening force compared to packaging in which the adhesive force of the sealing line must be overcome to open. However, practice has shown that even with this packaging considerable forces are still required to open the packaging, since the lid part has to be peeled off over the entire length of the sealing line.

Der Erfindung liegt die Aufgabe zugrunde, eine leicht zu öffnende Ein- oder Mehrkammer-Verpackung mit den Merkmalen des Oberbegriffs des Anspruchs 1 so weiterzubilden, daß ohne Beeinträchtigung der festen und hermetischen Abdichtung der verschlossenen Verpackung der Öffnungsvorgang noch wesentlich erleichtert wird und so auch für Kinder oder Frauen ohne Schwierigkeiten ausgeführt werden kann.The invention has for its object to develop an easy-to-open single or multi-chamber packaging with the features of the preamble of claim 1 so that the opening process is still much easier without affecting the tight and hermetic seal of the sealed packaging and so for children or women can run without difficulty.

Diese Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst.This object is solved by the features of claim 1.

Bei der gemäß der Erfindung ausgebildeten Verpackung brauchen Unterteil und Deckelteil nicht mehr entlang der Siegelzone des Randflansches voneinander getrennt zu werden. In diesem Bereich bleiben vielmehr Unterteil und Deckelteil fest miteinander verbunden. Zum Öffnen wird vielmehr der Deckelteil entlang einer Schwächungslinie durchtrennt, die innerhalb der Siegelzone im Deckelmaterial vorgesehen ist. Diese Schwächungslinie ist im Unterschied zu der Kerblinie bei der Verpackung gemäß der eingangs genannten deutschen Offenlegungsschrift 36 13 155 so ausgebildet, daß sie ein vollständiges Durchreißen des Deckelteils entlang der Schwächungslinie und unter der Wirkung der an der Grifflasche angreifenden Zugkraft gewährleistet. Diese Schwächungslinie erstreckt sich zusätzlich auch in Fluchtung mit den beiden Seitenkanten der Grifflasche. Die Schwächungslinie umgrenzt somit den abreißbaren Bereich des Deckelteils einschließlich der mit diesem einstückig verbundenen Grifflasche. Die zusätzlich zu der Schwächungslinie vorgesehene Ritzlinie in dem aus einer mehrschichtigen Verbundfolie bestehenden Teil der Verpackung schließt den Kreuzungsbereich zwischen der Siegelzone und der Grifflasche ein. Diese zusätzliche Ritzlinie ist so angeordnet und ausgebildet, daß in dem von der Ritzlinie eingeschlossenen Bereich beim Öffnen der Verpackung und beim Ziehen an der Grifflasche ein zur Siegelzone gehörender Schichtbereich der Verbundfolie sich von den anderen Schichten des zugehörigen Verbundmaterials abschält. Zum Öffnen braucht also nur dieser eng begrenzte Folienbereich abgeschält zu werden, während das eigentliche Öffnen der Verpackung entlang der beim Öffnen durchreißenden Schwächungslinie erfolgt. Die Grifflasche läßt sich beim Öffnen also mit relativ geringer Kraft von dem Siegelzonenbereich trennen, so daß dann über diese die zum Weiterreißen entlang der Schwächungslinie notwendigen Kräfte leicht aufgebracht werden können. Bei alledem ist gleichzeitig in dem definierten Kreuzungsbereich eine hermetische Abdichtung durch hohe Siegelhaftkräfte sichergestellt.In the case of the packaging designed according to the invention, the lower part and the cover part no longer need to be separated from one another along the sealing zone of the edge flange. Rather, the lower part and the cover part remain firmly connected to one another in this area. Rather, to open the cover part is cut along a line of weakness, which is provided within the sealing zone in the cover material. In contrast to the score line in the packaging, this weakening line is designed in accordance with the aforementioned German Offenlegungsschrift 36 13 155 in such a way that it ensures that the cover part is completely torn along the weakening line and under the effect of the tensile force acting on the grip tab. This line of weakness also extends in alignment with the two side edges of the grip tab. The line of weakness thus delimits the region of the cover part that can be torn off, including the grip tab connected in one piece with it. The scoring line provided in addition to the weakening line in the part of the packaging consisting of a multilayer composite film encloses the intersection area between the sealing zone and the grip tab. This additional scratch line is arranged and designed so that in the area enclosed by the scoring line when opening the packaging and when pulling on the grip tab, a layer area of the composite film belonging to the sealing zone peels off from the other layers of the associated composite material. To open it, only this narrowly delimited film area needs to be peeled off, while the actual opening of the packaging takes place along the weakening line that tears open. The handle tab can thus be separated from the sealing zone area with relatively little force, so that the forces required for tearing along the weakening line can then be easily applied via this area. At the same time, a hermetic seal is ensured in the defined intersection area by high sealing adhesive forces.

Die gleiche Ausbildung, wie sie für den Kreuzungsbereich der Grifflasche mit der entlang dem Randflansch des Unterteils verlaufenden Siegelzone vorgesehen ist, kann auch für den Kreuzungsbereich der Grifflasche mit der entlang eines Trennsteges des Unterteils einer Mehrkammer-Verpackung angeordneten Siegelverbindung vorgesehen sein.The same design as is provided for the crossing area of the grip tab with the sealing zone running along the edge flange of the lower part can also be provided for the crossing area of the grip tab with the sealing connection arranged along a separating web of the lower part of a multi-chamber packaging.

Die zusätzliche Ritzlinie kann im Randflansch des aus der Verbundfolie hergestellten Unterteils oder, mit besonderem Vorteil, auf der Unterseite des aus der Verbundfolie hergestellten Deckelteils vorgesehen sein. In letzterem Fall ist die den Aufreißbereich des Deckelteils begrenzende Schwächungslinie von der Oberseite des Deckelteils her in diesen eingebracht. Der Vorteil dieser Ausführung liegt darin, daß alle Schwächungs- und Ritzlinien nur im Deckelteil vorgesehen sind und daher in einem einzigen Arbeitsschritt in diesen eingearbeitet werden können, was die Herstellung deutlich erleichtert.The additional score line can be provided in the edge flange of the lower part made of the composite film or, with particular advantage, on the underside of the cover part made of the composite film. In the latter case, the line of weakness delimiting the tear-open area of the cover part is introduced into the cover part from the top thereof. The advantage of this design lies in the fact that all weakening and scoring lines are only provided in the cover part and can therefore be incorporated into it in a single work step, which significantly simplifies production.

Die Erfindung wird nachfolgend anhand schematischer Zeichnungen an mehreren Ausführungsbeispielen näher erläutert.The invention is explained in more detail below with the aid of schematic drawings using several exemplary embodiments.

Es zeigen:

  • Figur 1 und 3 jeweils in Draufsicht Deckelteil und Unterteil einer Verpackung gemäß der Erfindung;
  • Figur 2 im Ausschnitt und im Querschnitt ein Detail der Verpackung nach Figur 1 und 2;
  • Figur 4 und 5 das in Figur 3 mit 69 bezeichnete Detail im größeren Maßstabe;
  • Figur 6 und 7 jeweils in Draufsicht Deckelteil und Unterteil einer abgewandelten Ausführungsform der Verpackung gemäß der Erfindung;
  • Figur 8 einen Querschnitt durch den Deckelteil;
  • Figur 9 die mit 79 in Figur 6 bezeichnete Einzelheit im größeren Maßstabe in Draufsicht und
  • Fig. 10 im größeren Maßstabe einen Querschnitt durch den Kreuzungsbereich zwischen einer Grifflasche und einer Siegellinie einer Verpackung gemäß der Erfindung.
Show it:
  • Figures 1 and 3 each in plan view cover part and lower part of a package according to the invention;
  • Figure 2 in detail and in cross section a detail of the packaging according to Figures 1 and 2;
  • FIGS. 4 and 5 show the detail designated 69 in FIG. 3 on a larger scale;
  • 6 and 7 each show a top view of the cover part and lower part of a modified embodiment of the packaging according to the invention;
  • Figure 8 shows a cross section through the cover part;
  • Figure 9 shows the detail designated 79 in Figure 6 on a larger scale in plan view and
  • Fig. 10 on a larger scale a cross section through the intersection between a grip tab and a sealing line of a package according to the invention.

Die Verpackung gemäß den Figuren 1 bis 5 umfaßt einen Deckelteil 60 aus einem Folienmaterial, das z.B. eine außenliegende Metall-, z.B. Aluminiumfolie 66 und eine z.B. Siegelfähige Kunststoffschicht 67 auf deren Unterseite um faßt. Im Abstand vom Rand des Deckelteils ist durch eine umlaufende Schwächungslinie 64 ein Aufreißbereich begrenzt. Im Bereich einer Ecke des etwa quadratischen Deckelteils ist der Aufreißteil mit einer über den Rand des Deckelteils vorspringenden Grifflasche 65 einstückig verbunden. Der Deckelteil 60 kann eben ausgebildet sein, wie dies dargestellt ist, oder in gewünschter Weise profiliert sein. Die Deckelfolie kann auch noch eine äußere Lackschicht oder dgl. tragen die zur Beschriftung oder anderweitigen Ausgestaltung der Deckelaußenfläche dient.The packaging according to FIGS. 1 to 5 comprises a cover part 60 made of a film material which, for example, comprises an outer metal, eg aluminum film 66 and a sealable plastic layer 67 on the underside thereof. A tear-open area is delimited at a distance from the edge of the cover part by a circumferential line of weakness 64. In the area of a corner of the approximately square lid part, the tear-open part is integrally connected to a grip tab 65 projecting over the edge of the lid part. The cover part 60 can be flat, as shown, or can be profiled in the desired manner. The cover film can also carry an outer layer of lacquer or the like, which is used for labeling or otherwise designing the outer surface of the cover.

Der Deckelteil 60 wird fest und abdichtend mit dem Randflansch 62 eines Unterteils 61, z.B. durch Kleben,Schweißen oder Kalt- oder Heißsiegeln in einem Flächenbereich verbunden, der entlang einer umlaufenden Siegellinie 63 orientiert ist.
Wie insb. Figur 5 zeigt, ist der Unterteil aus einer Verbundfolie hergestellt. Diese besteht z.B. aus drei Schichten, nämlich einer außenliegenden Metallfolie 73, einer mittleren Kunststoffschicht 72 und einer innenliegenden Kunststoffschicht aus schweiß- oder siegelfähigem Material. Die mittlere Schicht 72 ist so gewählt, daß sich unter bestimmten Kräften die Siegelschicht 71 und die mittlere Schicht 72 voneinander durch Abschälen delaminieren lassen. Derartige Verbundfolien sind z.B. aus der eingangs genannten DE-OS 36 13 155 bekannt. Bei Bedarf kann die äußere Aluminiumschicht 73 noch eine äußere Schutzlackschicht tragen.The cover part 60 is firmly and sealingly connected to the edge flange 62 of a lower part 61, for example by gluing, welding or cold or heat sealing in a surface area which is oriented along a circumferential sealing line 63.
As shown in FIG. 5 in particular, the lower part is made of a composite film. This consists, for example, of three layers, namely an outer metal foil 73, a middle plastic layer 72 and an inner plastic layer made of weldable or sealable material. The middle layer 72 is selected such that the sealing layer 71 and the middle layer 72 can be delaminated from one another by peeling off under certain forces. Such composite films are known, for example, from DE-OS 36 13 155 mentioned at the beginning. If required, the outer aluminum layer 73 can also carry an outer protective lacquer layer.

Wie aus den Figuren 4 und 5 hervorgeht, ist in dem Eckbereich des R andflansches 62 des Unterteils, an dem die Grifflasche 65 des Deckelteils über die Verpackung hinausragt, eine zusätzliche Schwächunglinie oder Ritzung 70 vorgesehen, die in der Einzelheit 69 gemäß Figur 4 näher dargestellt ist. Man erkennt, daß die Ritzung 70 im Eckbereich die Siegellinie 63 einschließt und nur beim Kreuzen der Siegellinie unterbrochen ist. Die Ausdehnung des durch die Ritzung 70 begrenzten Bereiches entlang der Siegellinie 63 ist durch die Breite der Grifflasche 65 im Kreuzungsbereich mit dem Randflansch 62 bestimmt. Die Anordnung ist so getroffen, daß die Haftkraft entlang der Siegellinie 63 größer ist als die Haftkraft zwischen den Schichten 71 und 62 des Unterteils. Soll also die Verpackung geöffnet werden und wird an der Grifflasche 65 eine entsprechende Öffnungskraft aufgebracht, so verbleibt der durch die Ritzung 70 eng begrenzte Bereich der Schicht 71 über die Siegellinie 63 fest mit dem Deckelteil 60 verbunden und schält sich vom Rand des Unterteils 61 ab, so daß die Grifflasche vom Unterteil leicht gelöst werden kann und anschließend durch Einleiten der Aufreißkraft in die Schwächungslinie 64 das gewollte Aufreißen des Deckelteils einleitet.As can be seen from FIGS. 4 and 5, an additional weakening line or scoring 70 is provided in the corner region of the edge flange 62 of the lower part, on which the grip tab 65 of the cover part projects beyond the packaging, which is shown in more detail in detail 69 according to FIG is. It can be seen that the scoring 70 encloses the sealing line 63 in the corner region and is only interrupted when the sealing line is crossed. The extent of the area delimited by the scoring 70 along the sealing line 63 is determined by the width of the grip tab 65 in the area of intersection with the edge flange 62. The arrangement is such that the adhesive force along the sealing line 63 is greater than the adhesive force between the layers 71 and 62 of the lower part. If the packaging is to be opened and a corresponding opening force is applied to the grip tab 65, the area of the layer 71 which is narrowly delimited by the scoring 70 remains firmly connected to the cover part 60 via the sealing line 63 and peels off Edge of the lower part 61, so that the grip tab can be easily detached from the lower part and then initiates the intended tearing of the cover part by introducing the tear force into the weakening line 64.

Bei der Ausführungsform nach den Figuren 6 bis 9 ist der Deckelteil 75 aus einer Verbundfolie hergestellt. Diese kann z.B. aus einer Aluminiumfolie 84 mit äußerer Schutzlackschicht 82, einer Delaminierungsschicht 85 und einer Heißsiegelschicht 83 bestehen. Der Aufreißbereich ist durch eine auf der Außenseite des Deckelteils liegende Schwächungslinie 77 begrenzt. Der Deckelteil 77 wird entlang der Verbindungs- oder Siegellinie 76 mit dem Randflansch 81 des Unterteils 80 abdichtend und fest verbunden. Der Deckelteil weist eine Grifflasche 78 auf, die über den Randflansch 81 des Unterteils hinausragt. Im Kreuzungsbereich der Grifflasche 78 mit dem Randflansch ist auf der Unterseite des Deckelteils ehe im wesentlichen in sich geschlossene Ritzung 86 vorgesehen, welche die Siegelschicht 83 und teilweise auch die Delaminierungsschicht 85 betrifft. Beim Öffnen der Packung löst sich unter der durch die Grifflasche 78 eingeleiteten Kraft die Siegelschicht 83 oder die Delaminierungsschicht 85 von der Schicht 91 oder bricht in sich auf. Die Verbindung entlang der Siegellinie 76 bleibt zwischen dem Rand 81 des Unterteils und dem Deckelteil intakt, während die Grifflasche 78 sich von diesem Rand löst und das Öffnen durch Einreißen der Schwächungslinie 77 ermöglicht.
Die Einzelheiten im Kreuzungsbereich sind im Querschnitt und im größeren Maßstabe in Figur 10 noch einmal dargestellt. Man erkennt, daß die Delaminierung nicht unbedingt zwischen der Schicht 83 und der Schicht 85 erfolgen muß. Es kann vielmehr auch ein Abbruch innerhalb der Schicht 85 erfolgen, wie dies in der Figur 10 angedeutet und oben schon erwähnt ist.In the embodiment according to FIGS. 6 to 9, the cover part 75 is made from a composite film. This can consist, for example, of an aluminum foil 84 with an outer protective lacquer layer 82, a delamination layer 85 and a heat seal layer 83. The tear area is limited by a line of weakness 77 lying on the outside of the cover part. The cover part 77 is sealed and firmly connected along the connecting or sealing line 76 to the edge flange 81 of the lower part 80. The cover part has a grip tab 78 which projects beyond the edge flange 81 of the lower part. In the area of intersection of the grip tab 78 with the edge flange, essentially self-contained scratching 86 is provided on the underside of the cover part, which concerns the sealing layer 83 and partly also the delamination layer 85. When the package is opened, the sealing layer 83 or the delamination layer 85 detaches from the layer 91 or breaks open under the force introduced by the grip tab 78. The connection along the sealing line 76 remains intact between the edge 81 of the lower part and the cover part, while the grip tab 78 detaches from this edge and enables opening by tearing the weakening line 77.
The details in the intersection area are shown again in cross section and on a larger scale in FIG. 10. It can be seen that the delamination does not necessarily have to take place between the layer 83 and the layer 85. Rather, termination can also take place within layer 85, as indicated in FIG. 10 and already mentioned above.

Der Unterteil kann ebenfalls aus einer Verbundfolie, z.B.einer Aluminium folie 90 mit Siegelschicht 91 bestehen. Die Breite der Siegellinie ist im Berührungsbereich der beiden Teile stärker ausgezogen dargestellt. Beiderseits der Siegellinie verläuft die Ritzung 86.The lower part can also consist of a composite foil, e.g. an aluminum foil 90 with a sealing layer 91. The width of the sealing line is shown in a stronger line in the area of contact between the two parts. The score 86 runs on both sides of the sealing line.

Es ist ersichtlich, daß ein solcher eng begrenzter Ablösebereich zwischen Deckelteil und Unterteil nicht nur im Randflansch des Unterteils vorgesehen sein kann. Falls der Unterteil durch Stege oder Rippen in zwei oder mehr Kammern unterteilt ist, wird der Deckelteil auch mit der Oberseite der Trennstege entlang einer Siegellinie verschweißt. Auch hier kann im Bereich der Stege ein eng begrenzter Kreuzungsbereich in der anhand den Figuren beschriebenen Weise mit einem Ablöseverhalten durch Abschälen ausgestattet sein. Dies kann z.B. sinnvoll sein um den Öffnungsvorgang von einem Kammerbereich zu dem anderen Kammerbereich nur über begrenzte Flächenbereiche der Stege übergehen zu lassen.It can be seen that such a narrowly limited separation area between the cover part and the lower part can not only be provided in the edge flange of the lower part. If the lower part is divided into two or more chambers by webs or ribs, the cover part is also welded to the top of the separating webs along a sealing line. Here, too, in the area of the webs, a narrowly defined intersection area can be equipped with a peeling behavior in the manner described with reference to the figures. This can e.g. be useful in order to allow the opening process to pass from one chamber area to the other chamber area only over limited surface areas of the webs.

Claims (4)

  1. Easy-to-open packaging with one or more chambers, comprising a saucer-shaped or cup-shaped lower part with a peripheral flange and a level or profiled lid part with a pull tab, wherein the lower part and the lid part can be connected in a sealed manner, over a surface region following the peripheral flange, by sealing or the like and at least one of the two parts consists of a multi-layer sandwich foil with a degree of peeling resistance - between at least one layer further inside and one layer further outside - less than the sealing or connection force, and wherein at least one line of weakness, extending radially within the connection surface region, is provided in the lid part to delimit one or a plurality of tear-off parts, characterized in that the line of weakness (64) also extends in alignment with the respective lateral edges of the pull tab (65) and is formed in such a manner that the lid material tears through under the effect of the opening force applied by means of the pull tab (65), and, in addition to the line of weakness (64), a perforated line (70) is provided in the part (61) consisting of the multi-layered sandwich foil and starting from the connection surface in the sandwich foil in such a manner that it only encloses the region of intersection between the pull tab (65) and the connection surface region (63) between the two parts (60,61) in such a manner that, upon opening, a flat portion of the internal layer detaches from the sandwich foil in the region of intersection.
  2. Packaging in accordance with claim 1, characterized in that the additional perforated line (70), limited to the region of intersection, is provided on the upper surface in the flange region of the lower part.
  3. Packaging in accordance with claim 1, characterized in that the additional perforated line, limited to the region of intersection, is provided on the underside of the lid part (75) manufactured from a sandwich foil.
  4. Packaging in accordance with one of claims 1 to 3, characterised in that the pull tab is arranged inside the perforated line extending along the peripheral flange on the underside, and is formed by means of a surface portion of the lid part, delimited by a line of weakness and which can be pushed in, and is arranged on the surface - remote from the associated tear-off part - of an inner or separating web on the lower part connected in a sealed manner by sealing to the lid part, and the additional perforated line in the lid part or on the web includes the region of intersection between the surface portion, forming the pull tab, and the web.
EP90100810A 1989-01-19 1990-01-16 Easy to open package Expired - Lifetime EP0379934B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3901503 1989-01-19
DE3901503A DE3901503A1 (en) 1989-01-19 1989-01-19 EASY TO OPEN PACKING

Publications (2)

Publication Number Publication Date
EP0379934A1 EP0379934A1 (en) 1990-08-01
EP0379934B1 true EP0379934B1 (en) 1993-10-27

Family

ID=6372401

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90100810A Expired - Lifetime EP0379934B1 (en) 1989-01-19 1990-01-16 Easy to open package

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US (1) US5002223A (en)
EP (1) EP0379934B1 (en)
JP (1) JPH02233358A (en)
AT (1) ATE96393T1 (en)
DE (2) DE3901503A1 (en)
DK (1) DK0379934T3 (en)
ES (1) ES2050281T3 (en)

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JP2724355B2 (en) * 1990-06-15 1998-03-09 出光石油化学株式会社 Easy-open container and manufacturing method thereof
DK123591A (en) * 1991-06-25 1992-12-26 Schur Int As Brdr GENERAL SALES PACKAGING, EX. FOR Slicing discs
WO1995006600A1 (en) * 1993-09-03 1995-03-09 The Procter & Gamble Company Improved tear-away canister lid
DE4410206A1 (en) * 1994-03-24 1995-09-28 Tetra Laval Holdings & Finance Elastic pack with partially detachable gripping tab
DE19706207B4 (en) * 1996-02-15 2008-04-03 Dynamit Nobel Defence Gmbh Cover for a pressurized container
US6264098B1 (en) 1997-02-06 2001-07-24 Sonoco Development, Inc. Tubular container with a heat seal having non-symmetrical inner and outer beads
US5979748A (en) * 1997-02-06 1999-11-09 Sonoco Development, Inc. Tubular container with a heat seal having an inner and outer bead and method of manufacturing said container
US5868307A (en) * 1997-08-11 1999-02-09 Westvaco Corporation Carton opening feature
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IT1296883B1 (en) * 1997-12-18 1999-08-02 Safta Spa FOLDABLE PACKAGING SYSTEM AND RELATED MANUFACTURING PROCEDURES
DE19847125A1 (en) * 1998-10-13 2000-04-20 Zimmer Detlef Packing materials for various articles are provided with features detectable by different senses
FR2797622B1 (en) * 1999-08-17 2001-11-02 Danisco Flexible France LAMINATE PACKAGING SHEET FOR CLOSING AND PACKAGING COMPRISING SAME
WO2002038462A2 (en) * 2000-11-13 2002-05-16 The Procter & Gamble Company Removable closure device
MY138157A (en) * 2002-03-07 2009-04-30 Brasilata Embalagens Metalicas Plastic lid for a can
DE10359035A1 (en) * 2003-12-15 2005-07-14 Huhtamaki Alf Zweigniederlassung Der Huhtamaki Deutschland Gmbh & Co. Kg Plastics beaker, for liquid or paste or solid foodstuffs or detergents, has a lid welded to the beaker edge to seal the contents and ensure tamper-proof protection
DE102006046664B4 (en) * 2006-09-29 2011-03-31 Sig Technology Ag Pack with peelable lid
EP2142436A4 (en) * 2007-04-23 2012-06-27 Wrigley W M Jun Co Refillable package for consumable products
US11414253B2 (en) * 2012-07-11 2022-08-16 Mark Gayer Multi-portion removable cover apparatus and related methods
EP2872413B1 (en) 2012-07-11 2018-04-25 Gayer, Mark Multi-portion removable cover apparatus and related methods
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Also Published As

Publication number Publication date
DE3901503A1 (en) 1990-08-02
US5002223A (en) 1991-03-26
EP0379934A1 (en) 1990-08-01
DK0379934T3 (en) 1994-02-07
JPH02233358A (en) 1990-09-14
DE59003174D1 (en) 1993-12-02
ATE96393T1 (en) 1993-11-15
ES2050281T3 (en) 1994-05-16
DE3901503C2 (en) 1992-06-11

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