EP0377569B1 - Packing container with a tear-open arrangement - Google Patents

Packing container with a tear-open arrangement Download PDF

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Publication number
EP0377569B1
EP0377569B1 EP19880905689 EP88905689A EP0377569B1 EP 0377569 B1 EP0377569 B1 EP 0377569B1 EP 19880905689 EP19880905689 EP 19880905689 EP 88905689 A EP88905689 A EP 88905689A EP 0377569 B1 EP0377569 B1 EP 0377569B1
Authority
EP
European Patent Office
Prior art keywords
strip
tear
adhesive
packing container
wall
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
EP19880905689
Other languages
German (de)
French (fr)
Other versions
EP0377569A1 (en
Inventor
Norbert Buchner
Klaus Domke
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0377569A1 publication Critical patent/EP0377569A1/en
Application granted granted Critical
Publication of EP0377569B1 publication Critical patent/EP0377569B1/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
    • B65D77/225—Pressure relief-valves incorporated in a container wall, e.g. valves comprising at least one elastic element
    • 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
    • B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • B65D17/28—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness
    • B65D17/401—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness characterised by having the line of weakness provided in an end wall
    • B65D17/4011—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness characterised by having the line of weakness provided in an end wall for opening completely by means of a tearing tab
    • 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
    • B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
    • B65D2517/0001—Details
    • B65D2517/001—Action for opening container
    • B65D2517/0013—Action for opening container pull-out tear panel, e.g. by means of a tear-tab
    • 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
    • B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
    • B65D2517/0001—Details
    • B65D2517/0058—Other details of container end panel
    • B65D2517/0059—General cross-sectional shape of container end panel
    • B65D2517/0061—U-shaped
    • 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
    • B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
    • B65D2517/0001—Details
    • B65D2517/0058—Other details of container end panel
    • B65D2517/008—Materials of container end panel
    • B65D2517/0085—Foil-like, e.g. paper or cardboard
    • B65D2517/0086—Foil-like, e.g. paper or cardboard laminated

Definitions

  • the invention is based on a packaging container according to the preamble of claim 1.
  • a packaging container according to the preamble of claim 1.
  • EP-A-104 548 and EP-A-129 102 preferably in the mirror of Cover a weakening line in the form of a notch that surrounds a tear piece.
  • a grip tab the free end of which can be easily gripped with the fingers to remove the tear-open part, is connected to the start section of the tear-open part, which tapers as a tongue.
  • a packaging container with a pressure relief valve has become known from EP-A-209 729, through which gas generated by the full goods during storage, for example in the case of coffee, carbon dioxide can escape, so that inflation of the packaging container is avoided.
  • the object of the invention is to provide an easy-to-open packaging container with a pressure relief valve, which is constructed in a material-saving manner.
  • the packaging container according to the invention with the characterizing features of claim 1 has the advantage that the grip tab and the pressure relief valve are integrated in one part.
  • this training has the further advantage that the production of the weakening line for the tear-open part and the opening for the pressure relief valve in a single operation and the attachment of the combined grip tab pressure relief valve part to the packaging container can also be carried out in a single operation, so that also the work involved in manufacturing the container is very low.
  • FIG. 1 shows the head of a packaging container with a tear-open device in a diagrammatic view.
  • 2 shows a part of the packaging container according to FIG. 1 in cross section in the plane II-II of FIG. 1
  • FIGS. 3 and 4 show two other exemplary embodiments of a tear-open device of a packaging container in plan view.
  • 5 shows the tear-open device according to FIG. 4 in cross section in the plane VV of FIG. 4
  • FIG. 6 shows a further exemplary embodiment of a tear open device in cross section.
  • a packaging container has a tubular or sleeve-shaped body 1 and its upper opening is closed with a lid 2, which is sealed to the upper end of the body 1 with a U-shaped edge felt 3.
  • the packaging container is water vapor and gas tight and particularly suitable for holding food and beverages that are sensitive to air and moisture.
  • the fuselage 1 is formed from a multilayer packaging material which has a weldable, thermoplastic layer on the inside.
  • the fuselage 1 has a square cross section with rounded corners; however, its cross-sectional shape can also be circular, oval, rectangular or polygonal, the corners preferably being rounded.
  • the cover 2 closing the upper opening of the fuselage 1 has a flat wall 4 and a U-shaped folded edge 3 which delimits this, the cross-sectional shape of the fuselage 1 and which surrounds the end of the fuselage and is sealed with the inside and outside thereof.
  • the cover 2 is made of a multi-layer composite material which has an outer layer 6 made of plastic or cardboard, a middle layer 7 made of thin metal foil and an inner layer 8 made of a weldable or heat-sealable plastic.
  • the packaging container has in a wall, preferably in the lid 2, a tear-open part 10 which is surrounded by a line of weakness 11 formed as a notch in the outer carrier layer.
  • the line of weakness 11 runs parallel in the flat wall 4 of the cover 2 near the edge flange 3, so that the tear-open part 10 results in a full tear-open area adapted to the cover mirror.
  • a second weakening line 12 bends from the weakening line 11 to the center of the cover 2, which, together with an arc-shaped weakening line 13 running approximately parallel thereto, delimit a tear-open tongue 14 extending towards the center of the cover 2 with a starting section 15.
  • the lines of weakness 12, 13 designed as notches or grooves are interrupted and their extension is continued by two parallel cuts 16 and a U-shaped cut 17, which delimits the starting section 15.
  • the cuts 16 and the U-shaped cut 17 penetrate the lid material completely so that the U-shaped start section 15 can be bent out of the lid surface and through the cuts 17 a gas exchange between the inside and outside of the container is possible.
  • the area of the start section 15, the cuts 16 and the ends of the weakening lines 12 and 13 are in platelets or strips 20 on the top of the cover 2 attached.
  • the strip 20 which has a rectangular shape, consists of a flexible film, preferably made of plastic, such as polyethylene or polypropylene, and has a thickness of approximately 30 ⁇ m.
  • the width of the strip 20 is slightly larger than the distance between the two cuts 16 from one another and the leg of the U-scintel 17. Its length is considerably larger than the distance between the ends of the lines of weakness 12, 13 and the U-cut 17. With the top the cover 2, the strip 20 is connected by means of two adhesive surfaces 21 and 22.
  • the two adhesive surfaces 21 and 22, which extend transversely to the longitudinal extent of the strip 20, are at a distance from one another, so that the intermediate, adhesive-free part 23 of the strip 20 together with the region of the surface of the cover 2 covered by this part delimits a valve channel 24 into which the cuts 16 open.
  • the end region opposite the end region with the adhesive surface 21 25 of the strip 20 is also adhesive-free, so that this end region 25 can be grasped as a handle.
  • the adhesive surfaces 21 and 22, which extend transversely to the longitudinal extent of the strip 20, consist of a non-hardening adhesive, preferably based on polyurethane.
  • the cover 2 with the lines of weakness 12, 13 and cuts 16, 17 and with the strip 20 acts as follows:
  • the flexible strip 20 is fastened lying flat on the top of the flat wall 4 of the lid 2. He covers the through the wall 4 cuts 16 and 17, so that a connection between the interior of the container and the atmosphere surrounding it is interrupted.
  • the sealing effect in the area of the valve channel 24 is further increased if a liquid sealant, for example silicone oil, is arranged in this.
  • a liquid sealant for example silicone oil
  • the pressure inside the packaging container increases, which pressure is also transmitted through the cuts 16 into the valve channel 24.
  • the adhesive-free part 23 of the flexible strip 20 which delimits the valve channel 24 at the top, bulges upward, so that a connection to the outside is finally created by widening the channel 24.
  • the strip 20 also facilitates the opening of the packaging container.
  • the adhesive-free end region 25 of the strip 20 is gripped with fingers and pulled up.
  • the adhesive surface 22 adjoining the adhesive-free end region 25 stands out from the surface of the cover 2, but the punched-out, U-shaped starting section 15 remains stuck to the strip 20 because of less resistance and is pulled up with it.
  • the cover material breaks between the legs of the U-shaped cut 17 and the cuts 16 and between these and the ends of the weakening lines 12 and 13, so that the crack continues in the weakening lines 12 and 13 and on the weakening line surrounding the tear-open part 10 engages so that the tear-open part 10 can finally be torn out of the cover 2.
  • the adhesive is of a non-hardening type and its adhesive properties are set in such a way that when the strip 20 is pulled at an angle, it detaches from the plastic top of the cover 2, but that not clamped, punched-out starting section 15 is taken away when pulling off.
  • the strip 20 serving as a pressure relief valve and a grip tab has essentially the same structure as in the exemplary embodiment according to FIG. 1, but the breakthrough for the gas to pass through the cover 2 and the weakening lines 12, 13 designed differently.
  • the lines of weakness 12 and 13 delimiting the tear-open tongue 14 end in front of the strip 20.
  • the U-shaped cut 17 with the start section 15 is covered and sealed by one end of the strip 20 with the adhesive surface 21.
  • the gas passage opening into the valve channel 24 is formed by an arcuate slot 27 which is covered by the adhesive-free part 23 of the strip 20.
  • Figure 4 is similar to that of Figure 3, with the difference that the weakening lines 11, 12, 13 are not designed as continuous notches or grooves, but that they are composed of many notch sections 29, which angled cuts 30 as Have catch notches.
  • the packaging container according to FIGS. 3 and 4 is opened in a manner similar to that described above under FIG. 1.
  • the adhesive surface 22 is first detached and when the adhesive surface 21 is detached, the starting section 15 is then pulled along and the tear is transferred into the weakening lines 12, 13.
  • the execution of the weakening lines 11, 12, 13 from several notch sections is particularly advantageous in the case of lids whose carrier layer consists of cardboard.
  • the strip 20 forming a pressure relief valve and a grip tab is formed from a single-layer film with an adhesive layer applied in zones for the adhesive surfaces 21 and 22, the strip 20 'in the exemplary embodiment according to FIG 5 from a film completely coated on the underside with adhesive 32.
  • the adhesive-free zones for the handle end region 25 'and the adhesive-free part 23' for the valve channel 24 are by gluing formed by thin cover strips 33 and 34.
  • cover strips 33, 34 consist of a flexible plastic film, for example polyethylene, polyester and the like, with a thickness of approximately 10 ⁇ m.
  • the strip 20 ⁇ forming a pressure relief valve and a grip tab can also be designed such that the valve function is laid in the multi-layer strip 20 Stlutter (FIG. 6).
  • the strip 20 "consists of two congruent strips 36, 37 made of a flexible plastic film, of which the upper surface is completely coated on the underside with an adhesive and is connected to the upper side of the lower strip 37 except in the region of the valve channel 24 'to be formed, in the area of which the adhesive layer is inactivated by a transverse cover strip 38.
  • the lower strip 37 Centered on the cover strip 38, the lower strip 37 has an opening 39 which, when the strip 20 ⁇ is attached to the cover 2, is in alignment with the opening 27 of the wall 4 of the cover 2 Forming the glue-free grip area 25 ⁇ , the glue-free area 25 ′′ of the strip 37, which is also completely coated on the underside, is provided with a cover strip 33 ⁇ .
  • the strips 20 ′ and 20 und forming a pressure relief valve and a grip tab are arranged on the lid 2 of the container in the same way as in the exemplary embodiments according to FIGS. 1 to 4.
  • a combined pressure relief valve handle part can easily be designed differently based on the exemplary embodiments described above, without departing from the spirit of the invention.

Abstract

To facilitate the opening of a packing container, a separable tear-open portion (10) is fitted to one wall (2) and a tab is attached to the start portion (15). In order to allow gases to escape from the contents, the part forming the handle strip (25) (20, 20', 20'') has also been designed to act as a pressure relief valve. The handle-strip/pressure-relief valve consists preferably of a plastic strip which is glued to the start portion (15) of the tear-open portion (10) and serves as a valve channel (24) via an opening (16, 27) in the container wall (4).

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem Verpackungsbehälter nach der Gattung des Anspruchs 1. Zum Bilden einer flächenmäßig genau definierten Öffnung in einer Wand eines Verpackungsbehälters ist es beispielsweise aus der EP-A-104 548 und EP-A-129 102 bekannt, vorzugsweise im Spiegel des Deckels eine Schwächungslinie in Form einer Kerbe einzuarbeiten, die ein Aufreißteil umgibt. Mit dem schmal als Zunge zulaufenden Startabschnitt des Aufreißteils ist als Aufreißhilfe eine Grifflasche verbunden, deren freies Ende zum Austrennen des Aufreißteils mit den Fingern leicht erfaßt werden kann.The invention is based on a packaging container according to the preamble of claim 1. To form a precisely defined opening in a wall of a packaging container, it is known for example from EP-A-104 548 and EP-A-129 102, preferably in the mirror of Cover a weakening line in the form of a notch that surrounds a tear piece. A grip tab, the free end of which can be easily gripped with the fingers to remove the tear-open part, is connected to the start section of the tear-open part, which tapers as a tongue.

Ferner ist durch die EP-A-209 729 ein Verpackungsbehälter mit einem Überdruckventil bekanntgeworden, durch das während der Lagerung vom Fullgut erzeugtes Gas, beispielsweise bei Kaffee Kohlendioxid, entweichen kann, so daß ein Aufblähen des Verpackungsbehälters vermieden wird.Furthermore, a packaging container with a pressure relief valve has become known from EP-A-209 729, through which gas generated by the full goods during storage, for example in the case of coffee, carbon dioxide can escape, so that inflation of the packaging container is avoided.

Aufgabe der Erfindung ist es, einen leicht zu öffnenden Verpackungsbehälter mit einem Überdruckventil zu schaffen, der in materialsparender Weise aufgebaut ist.The object of the invention is to provide an easy-to-open packaging container with a pressure relief valve, which is constructed in a material-saving manner.

Vorteile der ErfindungAdvantages of the invention

Der erfindungsgemäße Verpackungsbehälter mit den kennzeichnenden Merkmalen des Anspruchs 1 hat den Vorteil, daß die Grifflasche und das Überdruckventil in einem Teil integriert sind. Neben der Materialersparnis hat diese Ausbildung den weiteren Vorteil, daß das Fertigen der Schwächungslinie für das Aufreißteil und des Durchbruchs für das Überdruckventil in einem einzigen Arbeitsgang und das Befestigen des kombinierten Grifflasche-Überdruckventilteils am Verpackungsbehälter ebenfalls in einem einzigen Arbeitsgang vorgenommen werden können, so daß auch der Arbeitsaufwand beim Fertigen des Behälters sehr gering ist.The packaging container according to the invention with the characterizing features of claim 1 has the advantage that the grip tab and the pressure relief valve are integrated in one part. In addition to saving material, this training has the further advantage that the production of the weakening line for the tear-open part and the opening for the pressure relief valve in a single operation and the attachment of the combined grip tab pressure relief valve part to the packaging container can also be carried out in a single operation, so that also the work involved in manufacturing the container is very low.

Durch die in den Unteransprüchen aufgezeigten Maßnahmen sind vorteilhafte Weiterbildungen des im Anspruch 1 aufgeführten Verpakkungsbehälters möglich. Eine besonders einfache Gestaltung des Grifflasche-Überdruckventils ergibt sich aus den Merkmalen des Anspruchs 2.The measures set out in the subclaims allow advantageous developments of the packaging container listed in claim 1. A particularly simple design of the grip tab pressure relief valve results from the features of claim 2.

Zeichnungdrawing

Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und werden in der nachfolgenden Beschreibung näher erläutert. Es zeigen Figur 1 den Kopf eines Verpackungsbehälters mit einer Aufreißeinrichtung in schaubildlicher Ansicht. Figur 2 einen Teil des Verpackungsbehälters nach Figur 1 im Querschnitt in der Ebene II-II der Figur 1, Figur 3 und 4 zwei andere Ausführungsbeispiele einer Aufreißeinrichtung eines Verpackungsbehälters in Draufsicht. Figur 5 die Aufreißeinrichtung nach Figur 4 im Querschnitt in der Ebene V-V der Figur 4 und Figur 6 ein weiteres Ausführungsbeispiel einer Aufreißeinrichtung im Querschnitt.Embodiments of the invention are shown in the drawing and are explained in more detail in the following description. 1 shows the head of a packaging container with a tear-open device in a diagrammatic view. 2 shows a part of the packaging container according to FIG. 1 in cross section in the plane II-II of FIG. 1, FIGS. 3 and 4 show two other exemplary embodiments of a tear-open device of a packaging container in plan view. 5 shows the tear-open device according to FIG. 4 in cross section in the plane VV of FIG. 4 and FIG. 6 shows a further exemplary embodiment of a tear open device in cross section.

Beschreibung der AusführungsbeispieleDescription of the embodiments

Ein Verpackungsbehälter hat einen rohr- oder hülsenförmigen Rumpf 1 und seine obere Öffnung ist mit einem Deckel 2 verschlossen, der mit einem U-formigen Randfolz 3 mit dem oberen Ende des Rumpfes 1 versiegelt ist. Der Verpackungsbehalter ist wasserdampf- und gasdicht und insbesondere zur Aufnahme von luft- und feuchtigkeitsempfindlichen Nahrungs- und Genußmitteln geeignet.A packaging container has a tubular or sleeve-shaped body 1 and its upper opening is closed with a lid 2, which is sealed to the upper end of the body 1 with a U-shaped edge felt 3. The packaging container is water vapor and gas tight and particularly suitable for holding food and beverages that are sensitive to air and moisture.

Der Rumpf 1 ist aus einem mehrschichtigen Packstoff geformt, der auf der Innenseite eine schweißbare, thermoplastische Schicht hat. Beim dargestellten Ausführungsbeispiel hat der Rumpf 1 einen quadratischen Querschnitt mit abgerundeten Ecken; seine Querschnittsform kann aber auch kreisförmig, oval, rechteckig oder mehreckig sein, wobei die Ecken vorzugsweise gerundet sind. Der die obere Öffnung des Rumpfes 1 verschließende Deckel 2 hat eine ebene Wand 4 und einen diese begrenzenden, der Querschnittsform des Rumpfes 1 angepaßten U-förmigen Falzrand 3, der das Ende des Rumpfes umgreift und mit dessen Innen- und Außenseite dicht versiegelt ist. Der Deckel 2 ist aus einem mehrschichtigen Verbundwerkstoff hergestellt, der eine äußere Schicht 6 aus Kunststoff oder Karton, eine mittlere Schicht 7 aus dünner Metallfolie und eine innere Schicht 8 aus einem schweißbaren oder heißsiegelbaren Kunststoff hat.The fuselage 1 is formed from a multilayer packaging material which has a weldable, thermoplastic layer on the inside. In the illustrated embodiment, the fuselage 1 has a square cross section with rounded corners; however, its cross-sectional shape can also be circular, oval, rectangular or polygonal, the corners preferably being rounded. The cover 2 closing the upper opening of the fuselage 1 has a flat wall 4 and a U-shaped folded edge 3 which delimits this, the cross-sectional shape of the fuselage 1 and which surrounds the end of the fuselage and is sealed with the inside and outside thereof. The cover 2 is made of a multi-layer composite material which has an outer layer 6 made of plastic or cardboard, a middle layer 7 made of thin metal foil and an inner layer 8 made of a weldable or heat-sealable plastic.

Der Verpackungsbehälter hat in einer Wand, vorzugsweise im Deckel 2 ein austrennbares Aufreißteil 10, das von einer als Kerbe in der äußeren Trägerschicht ausgebildeten Schwächungslinie 11 umgeben ist. Beim Ausführungsbeispiel nach Figur 1 verlauft die Schwächungslinie 11 in der ebenen Wand 4 des Deckels 2 parallel nahe dem Randflansch 3, so daß das Aufreißteil 10 eine dem Deckelspiegel angepaffte Vollaufreißfläche ergibt. Von der Schwächungslinie 11 biegt in einem geraden Abschnitt eine zweite Schwächungslinie 12 zur Mitte des Dekkels 2 hin ab, die zusammen mit einer dazu etwa parallel verlaufenden bogenförmigen Schwächungslinie 13 eine sich zur Mitte des Dekkels 2 hin erstreckende Aufreißzunge 14 mit einem Startabschnitt 15 begrenzen. Zur Mitte des Deckels 2 hin sind diE als Kerben oder Rillen ausgebildeten Schwächungslinien 12, 13 unterbrochen und ihre erstreckung wird von zwei parallelen Schnitten 16 und einem U-förmigen Schnitt 17 fortgesetzt, welcher den Startabschnitt 15 begrenzt. Die Schnitte 16 und der U-förmige Schnitt 17 durchdringen das Deckelmaterial vollständig so, daß der U-formige Startabschnitt 15 aus der Deckelfläche herausgebogen werden kann und durch die Schnitte 17 ein Gasaustausch zwischen dem Inneren und Äußeren des Behälters möglich ist.The packaging container has in a wall, preferably in the lid 2, a tear-open part 10 which is surrounded by a line of weakness 11 formed as a notch in the outer carrier layer. In the exemplary embodiment according to FIG. 1, the line of weakness 11 runs parallel in the flat wall 4 of the cover 2 near the edge flange 3, so that the tear-open part 10 results in a full tear-open area adapted to the cover mirror. In a straight section, a second weakening line 12 bends from the weakening line 11 to the center of the cover 2, which, together with an arc-shaped weakening line 13 running approximately parallel thereto, delimit a tear-open tongue 14 extending towards the center of the cover 2 with a starting section 15. Towards the center of the cover 2, the lines of weakness 12, 13 designed as notches or grooves are interrupted and their extension is continued by two parallel cuts 16 and a U-shaped cut 17, which delimits the starting section 15. The cuts 16 and the U-shaped cut 17 penetrate the lid material completely so that the U-shaped start section 15 can be bent out of the lid surface and through the cuts 17 a gas exchange between the inside and outside of the container is possible.

Zum Verschließen der als Durchbrüche wirkenden Schnitte 16 und 17 sowie zum Erleichtern des Heraushebens des Startabschnitts 15 aus der Deckelfläche ist über den Bereich des Startabschnitts 15, der Schnitte 16 und der Enden der Schwächungslinien 12 und 13 in Plättchen oder Streifen 20 auf der Oberseite des Deckels 2 befestigt. Der eine rechteckige Form aufweisende Streifen 20 besteht aus einer flexiblen Folie vorzugsweise aus Kunststoff, wie Polyäthylen oder Polypropylen, und hat eine Dicke von ca. 30 µm. Die Breite des Streifens 20 ist etwas größer als der Abstand der beiden Schnitte 16 voneinider und der Schenkel des U-Schinttes 17. Seine Länge ist wesentlich größer als der Abstand der Enden der Schwächungslinien 12, 13 und dem U-Schnitt 17. Mit der Oberseite des Deckels 2 ist der Streifen 20 mittels zweier Klebeflächen 21 und 22 verbunden. Die beiden sich quer zur Längserstreckung des Streifens 20 erstreckenden Klebeflächen 21 und 22 haben voneinander einen Abstand, so daß der dazwischenliegende, klebstofffreie Teil 23 des Streifens 20 zusammen mit dem von diesem Teil abgedeckten Bereich der Oberfläche des Dekkels 2 einen Ventilkanal 24 begrenzt, in den die Schnitte 16 münden. Der dem Endbereich mit der Klebefläche 21 gegenüberliegende Endbereich 25 des Streifens 20 ist ebenfalls klebstofffrei, so daß dieser Endbereich 25 als Griff erfaßt werden kann. Die quer zur Längserstreckung des Streifens 20 sich erstreckenden Klebeflächen 21 und 22 bestehen aus einem nicht aushärtenden Klebstoff vorzugsweise auf Polyurethanbasis.To close the cuts 16 and 17 acting as openings and to make it easier to lift the start section 15 out of the cover surface, the area of the start section 15, the cuts 16 and the ends of the weakening lines 12 and 13 are in platelets or strips 20 on the top of the cover 2 attached. The strip 20, which has a rectangular shape, consists of a flexible film, preferably made of plastic, such as polyethylene or polypropylene, and has a thickness of approximately 30 μm. The width of the strip 20 is slightly larger than the distance between the two cuts 16 from one another and the leg of the U-scintel 17. Its length is considerably larger than the distance between the ends of the lines of weakness 12, 13 and the U-cut 17. With the top the cover 2, the strip 20 is connected by means of two adhesive surfaces 21 and 22. The two adhesive surfaces 21 and 22, which extend transversely to the longitudinal extent of the strip 20, are at a distance from one another, so that the intermediate, adhesive-free part 23 of the strip 20 together with the region of the surface of the cover 2 covered by this part delimits a valve channel 24 into which the cuts 16 open. The end region opposite the end region with the adhesive surface 21 25 of the strip 20 is also adhesive-free, so that this end region 25 can be grasped as a handle. The adhesive surfaces 21 and 22, which extend transversely to the longitudinal extent of the strip 20, consist of a non-hardening adhesive, preferably based on polyurethane.

Der Deckel 2 mit den Schwächungslinien 12, 13 und Schnitten 16, 17 sowie mit dem Streifen 20 wirkt wie folgt:The cover 2 with the lines of weakness 12, 13 and cuts 16, 17 and with the strip 20 acts as follows:

Während der Lagerung des Verpackungsbehälters mit dem in ihm verpackten Füllgut ist der flexible Streifen 20 flachliegend auf der Oberseite der ebenen Wand 4 des Deckels 2 befestigt. Dabei deckt er die durch die Wand 4 durchgehenden Schnitte 16 und 17 ab, so daß eine Verbindung zwischen dem Inneren des Behälters und der diesen umgebenden Atmosphäre unterbrochen ist. Die Dichtwirkung im Bereich des Ventilkanals 24 wird noch erhöht, wenn in diesem ein flüssiges Dichtmittel, beispielsweise Silikonöl, angeordnet ist. Wenn nun das verpackte Füllgut ein Gas abgibt, steigt im Innern des Verpackungsbehälters der Druck, der durch die Schnitte 16 auch in den Ventilkanal 24 übertragen wird. Bei steigendem Druck im Innern des Behälters wölbt sich der den Ventilkanal 24 nach oben begrenzende klebstofffreie Teil 23 des flexiblen Streifens 20 nach oben aus, so daß schließlich durch Aufweitung des Kanals 24 eine Verbindung nach außen geschaffen wird. Durch diesen aufgeweiteten Ventilkanal strömt Gas aus dem Innern des Verpackungsbehälters so lange ab, bis der Druck unterhalb eines bestimmten Werts gefallen ist, bei dem sich der klebstofffreie Teil 23 des Streifens 20 wiederum auf die Oberfläche des Deckels 2 aufliegt und daß Silikonöl einen abdichtenden Film bildet. Dieser Entgasungsvorgang kann an sich mehrere Male wiederholen.During storage of the packaging container with the contents packed therein, the flexible strip 20 is fastened lying flat on the top of the flat wall 4 of the lid 2. He covers the through the wall 4 cuts 16 and 17, so that a connection between the interior of the container and the atmosphere surrounding it is interrupted. The sealing effect in the area of the valve channel 24 is further increased if a liquid sealant, for example silicone oil, is arranged in this. If the packaged product now releases a gas, the pressure inside the packaging container increases, which pressure is also transmitted through the cuts 16 into the valve channel 24. As the pressure inside the container rises, the adhesive-free part 23 of the flexible strip 20, which delimits the valve channel 24 at the top, bulges upward, so that a connection to the outside is finally created by widening the channel 24. Through this widened valve channel, gas flows out of the interior of the packaging container until the pressure has dropped below a certain value, at which the adhesive-free part 23 of the strip 20 in turn rests on the surface of the cover 2 and that silicone oil forms a sealing film . This degassing process itself can be repeated several times.

Es hat sich gezeigt, daß die Teile des Streifens 20 mit den Klebeflächen 21, 22 den U-förmigen Schnitt 17 und die Enden der Schwächungslinien 12, 13 vollständig abdichten.It has been shown that the parts of the strip 20 with the adhesive surfaces 21, 22 completely seal the U-shaped cut 17 and the ends of the lines of weakness 12, 13.

Der Streifen 20 erleichtert auch das Öffnen des Verpackungsbehälters. Zum Entfernen des Aufreißteils 10 aus dem Deckel 2 des Verpackungsbehälters wird mit den Fingern der klebstofffreie Endbereich 25 des Streifens 20 erfaßt und hochgezogen. Dabei hebt sich die an den klebstofffreien Endbereich 25 sich anschließende Klebefläche 22 von der Oberfläche des Deckels 2 ab, wobei jedoch der freigestanzte, U-förmige Startabschnitt 15 wegen geringeren Widerstandes am Streifen 20 kleben bleibt und mit hochgezogen wird. Beim Weiterziehen bricht das Deckelmaterial zwischen den Schenkeln des U-förmigen Schnittes 17 und den Schnitten 16 sowie zwischen diesen und den Enden der Schwächungslinien 12 und 13, so daß der Riß sich in den Schwächungslinien 12 und 13 fortsetzt und auf die den Aufreißteil 10 umgebende Schwächungslinie übergreift, so daß schließlich das Aufreißteil 10 vollständig aus dem Deckel 2 herausgerissen werden kann. Zur Beschaffenheit des Klebers der Klebeflächen 21 und 22 des Streifens 20 ist zu bemerken, daß der Kleber von nichtaushärtender Art ist und seine Klebeeigenschaften so eingestellt sind, daß dieser sich bei abgewinkeltem Ziehen des Streifens 20 von der Kunststoffoberseite des Deckels 2 löst, daß jedoch der nicht eingespannte, freigestanzte Startabschnitt 15 beim Abziehen mitgenommen wird.The strip 20 also facilitates the opening of the packaging container. To remove the tear-open part 10 from the lid 2 of the packaging container, the adhesive-free end region 25 of the strip 20 is gripped with fingers and pulled up. In this case, the adhesive surface 22 adjoining the adhesive-free end region 25 stands out from the surface of the cover 2, but the punched-out, U-shaped starting section 15 remains stuck to the strip 20 because of less resistance and is pulled up with it. When moving on, the cover material breaks between the legs of the U-shaped cut 17 and the cuts 16 and between these and the ends of the weakening lines 12 and 13, so that the crack continues in the weakening lines 12 and 13 and on the weakening line surrounding the tear-open part 10 engages so that the tear-open part 10 can finally be torn out of the cover 2. Regarding the nature of the adhesive of the adhesive surfaces 21 and 22 of the strip 20, it should be noted that the adhesive is of a non-hardening type and its adhesive properties are set in such a way that when the strip 20 is pulled at an angle, it detaches from the plastic top of the cover 2, but that not clamped, punched-out starting section 15 is taken away when pulling off.

Bei den Ausfürungsbeispielen nach den Figuren 3 und 4 hat der als Überdruckventil und als Grifflasche dienende Streifen 20 im wesentlichen den gleichen Aufbau wie bei dem Ausfürungsbeispiel nach Figur 1, dagegen sind der Durchbruch zum Durchlassen des Gases durch den Deckel 2 und die Schwächungslinien 12, 13 anders gestaltet. Bei dem Ausführungsbeispiel nach Figur 3 enden die die Aufreißzunge 14 begrenzenden Schwächungslinien 12 und 13 vor dem Streifen 20. In ihrerVerlängerung schließen sich die Schenkel des U-förmigen Schnitts 17 an, der den freigestanzten Startabschnitt 15 begrenzt. Der U-förmige Schnitt 17 mit dem Startabschnitt 15 wird von dem einen Ende des Streifens 20 mit der Klebefläche 21 abgedeckt und abgedichtet. Der in den Ventilkanal 24 mündende Gasdurchlaß ist durch einen bogenförmigen Schlitz 27 gebildet, der von dem klebstofffreien Teil 23 des Streifens 20 abgedeckt wird.In the exemplary embodiments according to FIGS. 3 and 4, the strip 20 serving as a pressure relief valve and a grip tab has essentially the same structure as in the exemplary embodiment according to FIG. 1, but the breakthrough for the gas to pass through the cover 2 and the weakening lines 12, 13 designed differently. In the embodiment according to FIG. 3, the lines of weakness 12 and 13 delimiting the tear-open tongue 14 end in front of the strip 20. In their extension join the legs of the U-shaped section 17 which delimits the punched-out start section 15. The U-shaped cut 17 with the start section 15 is covered and sealed by one end of the strip 20 with the adhesive surface 21. The gas passage opening into the valve channel 24 is formed by an arcuate slot 27 which is covered by the adhesive-free part 23 of the strip 20.

Das Ausfürungsbeispiel nach Figur 4 ist ähnlich ausgebildet wie das nach Figur 3 mit dem Unterschied, daß die Schwächungslinien 11, 12, 13 nicht als durchlaufende Kerben oder Rillen ausgebildet sind, sondern, daß sie sich aus vielen Kerbabschnitten 29 zusammensetzen, welche abgewinkelte Schnitte 30 als Fangkerben aufweisen.The embodiment of Figure 4 is similar to that of Figure 3, with the difference that the weakening lines 11, 12, 13 are not designed as continuous notches or grooves, but that they are composed of many notch sections 29, which angled cuts 30 as Have catch notches.

Das Öffnen des Verpackungsbehälters nach den Figuren 3 und 4 erfolgt ähnlich wie bei dem oben unter Figur 1 Beschriebenen. Beim Hochziehen des am klebstofffreien Endbereich 25 erfaßten Streifens 20 wird zunächst die Klebefläche 22 gelöst und beim Lösen der Klebefläche 21 wird dann der Startabschnitt 15 mitgezogen und der Weiterriß in die Schwächungslinien 12, 13 übergeleitet. Ergänzend wird bemerkt, daß die Ausfürung der Schwächungslinien 11, 12, 13 aus mehreren Kerbabschnitten insbesondere bei Deckeln vorteilhaft ist, deren Trägerschicht aus Karton besteht.The packaging container according to FIGS. 3 and 4 is opened in a manner similar to that described above under FIG. 1. When pulling up the strip 20 detected on the adhesive-free end region 25, the adhesive surface 22 is first detached and when the adhesive surface 21 is detached, the starting section 15 is then pulled along and the tear is transferred into the weakening lines 12, 13. In addition, it is noted that the execution of the weakening lines 11, 12, 13 from several notch sections is particularly advantageous in the case of lids whose carrier layer consists of cardboard.

In Abänderung zu den Ausführungsbeispielen nach den Figuren 1 bis 4, bei denen der ein Überdruckventil und eine Grifflasche bildende Streifen 20 aus einer einlagigen Folie mit zonenweise aufgetragener Klebstoffschicht für die Klebeflächen 21 und 22 gebildet ist, besteht der Streifen 20′ bei dem Ausfürungsbeispiel nach Figur 5 aus einer unterseitig vollständig mit Klebstoff 32 beschichteten Folie. Die klebstofffreien Zonen für den Griff-Endbereich 25′ und den klebstofffreien Teil 23′ für den Ventilkanal 24 werden durch Aufkleben von dünnen Abdeckstreifen 33 und 34 gebildet. Diese Abdeckstreifen 33, 34 bestehen aus einer flexiblen Kunststoffolie beispielsweise Polyäthylen, Polyester und dergleichen, mit einer Dicke von etwa 10 µm.In a modification of the exemplary embodiments according to FIGS. 1 to 4, in which the strip 20 forming a pressure relief valve and a grip tab is formed from a single-layer film with an adhesive layer applied in zones for the adhesive surfaces 21 and 22, the strip 20 'in the exemplary embodiment according to FIG 5 from a film completely coated on the underside with adhesive 32. The adhesive-free zones for the handle end region 25 'and the adhesive-free part 23' for the valve channel 24 are by gluing formed by thin cover strips 33 and 34. These cover strips 33, 34 consist of a flexible plastic film, for example polyethylene, polyester and the like, with a thickness of approximately 10 μm.

Der ein Überdruckventil und eine Grifflasche bildende Streifen 20˝ kann auch so ausgebildet sein, daß die Ventilfunktion in den mehrlagigen Streifen 20˝ verlegt wird (Figur 6). Der Streifen 20" besteht aus zwei deckungsgleichen Streifen 36, 37 aus einer flexiblen Kunststoffolie, von denen der obere unterseitig vollflächig mit einem Klebstoff beschichtet ist und mit. der Oberseite des unteren Streifens 37 außer im Bereich des zu bildenden Ventilkanals 24˝ verbunden ist, in dessen Bereich die Kleberschicht mit einem querverlaufenden Abdeckstreifen 38 kleberinaktiviert ist. Mittig ausgerichtet zum Abdeckstreifen 38 hat der untere Streifen 37 einen Durchbruch 39 der bei auf dem Deckel 2 befestigtem Streifen 20˝ in Dekkung mit dem Durchbruch 27 der Wand 4 des Deckels 2 liegt. Zum Ausbilden des klebstofffreien Griff-Bereichs 25˝ ist der klebstofffreie Bereich 25" des unterseitig ebenfalls vollflächig mit Klebstoff beschichteten Streifens 37 mit einem Abdeckstreifen 33˝ versehen. Im übrigen ist bei den Ausführungsbeispielen nach den Figuren 5 und 6 der ein Überdruckventil und eine Grifflasche bildende Streifen 20′ und 20˝ auf dem Deckel 2 des Behälters in gleicher Weise angeordnet wie bei den Ausführungsbeispielen nach den Figuren 1 bis 4.The strip 20˝ forming a pressure relief valve and a grip tab can also be designed such that the valve function is laid in the multi-layer strip 20 Streifen (FIG. 6). The strip 20 "consists of two congruent strips 36, 37 made of a flexible plastic film, of which the upper surface is completely coated on the underside with an adhesive and is connected to the upper side of the lower strip 37 except in the region of the valve channel 24 'to be formed, in the area of which the adhesive layer is inactivated by a transverse cover strip 38. Centered on the cover strip 38, the lower strip 37 has an opening 39 which, when the strip 20˝ is attached to the cover 2, is in alignment with the opening 27 of the wall 4 of the cover 2 Forming the glue-free grip area 25˝, the glue-free area 25 ″ of the strip 37, which is also completely coated on the underside, is provided with a cover strip 33˝. Otherwise, in the exemplary embodiments according to FIGS. 5 and 6, the strips 20 ′ and 20 und forming a pressure relief valve and a grip tab are arranged on the lid 2 of the container in the same way as in the exemplary embodiments according to FIGS. 1 to 4.

Ergänzend wird bemerkt, daß sich ein kombiniertes Überdruckventil-Grifflascheteil ohne weiteres aufgrund der oben beschrieben Ausführungsbeispiele auch anders ausbilden läßt, ohne vom Geist der Erfindung abzuweichen.In addition, it is noted that a combined pressure relief valve handle part can easily be designed differently based on the exemplary embodiments described above, without departing from the spirit of the invention.

Claims (7)

1. Easily opened packing container having a tear-open part (14) which can be disconnected from a wall (4) of the container and is defined by weakness lines (12, 13), the start section (15) of which tear-open part is connected to a handle clip, characterised in that the part (20, 20′, 20˝) forming the handle clip is also constructed as a pressure control valve which closes a through-hole (16, 27) in the wall (4) of the packing container.
2. Packing container according to Claim 1, characterised in that the part forming a handle clip and a pressure control valve consists of a flexible strip (20, 20′, 22˝) which has on the side facing the container wall (4) two adhesive surfaces (21, 22) extending transversely to its longitudinal extension, by means of which adhesive surfaces it is connected to the outside of the container wall, one of the adhesive surfaces connecting the start section (15) to the strip, and a valve channel (24) extending between the two adhesive surfaces between the strip and the container wall, into which valve channel a through-hole (16, 27) in the container wall (4) leads.
3. Packing container according to Claim 2, characterised in that the strip (20′) is coated over its entire underside with adhesive, and in that the adhesive layer is made inactive in the region of the handle end (25) and of the section (23) covering the valve channel (24) using in each case one cover strip (33, 34).
4. Packing container according to one of Claims 1 to 3, characterised in that the start section (15) of the tear-open part (10) is connected to the adhesive surface (22) between the handle end (25) and the valve channel (24) of the strip (20).
5. Packing container according to one of Claims 1 to 3, characterised in that the start section (15) is connected to the end of the strip (20) lying opposite the non-adhering handle end (25).
6. Packing container according to Claim 4 or 5, characterised in that the weakness lines connecting to the start section (15) are interrupted.
7. Packing container according to one of Claims 1 to 6, characterised in that the through-hole leading into the valve channel (24) is part of the weakness lines or of the unattached part of the start section (15).
EP19880905689 1987-08-06 1988-07-07 Packing container with a tear-open arrangement Expired - Lifetime EP0377569B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3726162 1987-06-08
DE19873726162 DE3726162A1 (en) 1987-08-06 1987-08-06 PACKAGING CONTAINER WITH Tear-off device

Publications (2)

Publication Number Publication Date
EP0377569A1 EP0377569A1 (en) 1990-07-18
EP0377569B1 true EP0377569B1 (en) 1991-06-19

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EP19880905689 Expired - Lifetime EP0377569B1 (en) 1987-08-06 1988-07-07 Packing container with a tear-open arrangement

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US (1) US4971218A (en)
EP (1) EP0377569B1 (en)
JP (1) JPH02504500A (en)
DE (2) DE3726162A1 (en)
WO (1) WO1989000955A1 (en)

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Also Published As

Publication number Publication date
DE3726162A1 (en) 1989-02-16
US4971218A (en) 1990-11-20
WO1989000955A1 (en) 1989-02-09
JPH02504500A (en) 1990-12-20
EP0377569A1 (en) 1990-07-18
DE3863359D1 (en) 1991-07-25

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