EP0221843B1 - Lid made of laminate with an opening closed by a strip member,and method for making it - Google Patents

Lid made of laminate with an opening closed by a strip member,and method for making it Download PDF

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Publication number
EP0221843B1
EP0221843B1 EP86810402A EP86810402A EP0221843B1 EP 0221843 B1 EP0221843 B1 EP 0221843B1 EP 86810402 A EP86810402 A EP 86810402A EP 86810402 A EP86810402 A EP 86810402A EP 0221843 B1 EP0221843 B1 EP 0221843B1
Authority
EP
European Patent Office
Prior art keywords
lid
opening
seal
tear
sealed
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
Application number
EP86810402A
Other languages
German (de)
French (fr)
Other versions
EP0221843A1 (en
Inventor
Horst Zumsteg
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.)
Amcor Flexibles Rorschach AG
Original Assignee
Alcan Rorschach 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 Alcan Rorschach AG filed Critical Alcan Rorschach AG
Priority to AT86810402T priority Critical patent/ATE44008T1/en
Publication of EP0221843A1 publication Critical patent/EP0221843A1/en
Application granted granted Critical
Publication of EP0221843B1 publication Critical patent/EP0221843B1/en
Expired 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
    • B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • B65D17/50—Non-integral frangible members applied to, or inserted in, preformed openings, e.g. tearable strips or plastic plugs
    • B65D17/506—Rigid or semi-rigid members, e.g. plugs
    • 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
    • B65D17/50—Non-integral frangible members applied to, or inserted in, preformed openings, e.g. tearable strips or plastic plugs
    • B65D17/501—Flexible tape or foil-like material
    • B65D17/502—Flexible tape or foil-like material applied to the external part of the container wall only
    • 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
    • B65D17/50—Non-integral frangible members applied to, or inserted in, preformed openings, e.g. tearable strips or plastic plugs
    • B65D17/501—Flexible tape or foil-like material
    • B65D17/505—Flexible tape or foil-like material applied to the external and internal part of the container wall
    • 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
    • B65D2517/008—Materials of container end panel
    • B65D2517/0085—Foil-like, e.g. paper or cardboard
    • B65D2517/0086—Foil-like, e.g. paper or cardboard laminated
    • 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
    • B65D2517/50—Non-integral frangible members applied to, or inserted in, a preformed opening
    • B65D2517/5002—Details of flexible tape or foil-like material
    • B65D2517/5024—Material
    • B65D2517/5027—Single layer
    • 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
    • B65D2517/50—Non-integral frangible members applied to, or inserted in, a preformed opening
    • B65D2517/504—Details of preformed openings
    • B65D2517/5064—Details of preformed openings the punched-out part of the preformed opening is re-inserted in the preformed opening and forming part of the tear panel
    • 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
    • B65D2517/50—Non-integral frangible members applied to, or inserted in, a preformed opening
    • B65D2517/5072—Details of hand grip, tear- or lift-tab
    • B65D2517/5083—Details of hand grip, tear- or lift-tab with means facilitating initial lifting of tape, e.g. lift or pull-tabs

Definitions

  • the invention relates to a lid made of a composite material with an opening closed by a pull tab according to the preamble of patent claim 1.
  • the invention further relates to a method for producing a lid with an opening closed by a pull tab according to the preamble of claim 8.
  • Composite material lid i.e. Known from several layers, in particular thermoplastics, in which an aluminum foil is embedded as gas and light protection and which have a drinking or pouring opening.
  • the aluminum of the aluminum foil When the drinking opening is punched out, the aluminum of the aluminum foil is exposed along the punched edge and can come into contact with the filling material. In the case of aggressive filling goods, such as fruit juices, the aluminum can corrode and lead to contamination of the contents.
  • the invention seeks to remedy this.
  • the object of the invention is to create a pouring and drinking opening, the edges of which are protected against corrosion and in which the part of the lid which closes the drinking opening can be reused as a closure pin after being torn open.
  • the invention solves these problems with a lid according to the characterizing features of patent claim 1 and by a method for its production according to the characterizing features of patent claim 8.
  • the lids can be produced in a continuous production process from band-shaped material, the lid blanks or the blanks provided with drinking or pouring openings and reclosure being stored rolled up until they are applied to the container can be.
  • the drinking opening can be closed again and again with the integrated locking pin, because the sealing edge remaining on the inside of the lid and reinforcing the edge of the opening gives it a stiffening.
  • the cut edge along the opening can be safely covered against the filling material by the edge overlapping the opening.
  • the collar-shaped extension of the closure and the edge on the closure enable the closure to be held securely within the opening if it is re-attached to the lid after the first opening.
  • the edge set back or offset from the surface of the closure by the thickness of the cover enables the tear-open tab to be sealed to the cover and the surface of the closure at the same time.
  • the lid 1 shown in Figure 1 on a container 29 (shown in broken lines) with a reclosable opening 3 consists of aluminum or a composite material which, for example as gas and light protection, an aluminum foil 5, as a sealing layer 7 a heat-sealable plastic, such as Surlyn by Dupont de Nemour, and have a tear-resistant plastic as cover layer 9.
  • a plastic insert 13 is inserted which, after being torn open, forms both the reclosure 15, short closure 15, and the reinforcing edge 17, short edge 17, in the the closure 15 can be inserted.
  • the edge 17 is firmly sealed from below with the lid.
  • a thin tear-open tab 19 is inseparably connected to both the lid 1 and the closure 15. So that a flat sealing surface is created, the edge 17 is set back by the thickness e of the cover 1 relative to the surface of the closure 15.
  • the three parts can be connected by mutual sealing.
  • the closure 15 and the edge 17 are connected by a web 21, which serves as a predetermined breaking point and breaks when the closure 15 is lifted with the tear-open tab 19, which preferably has a tab 23 that can be easily lifted off the lid 1 at one point.
  • the thickness of the web 21 must be dimensioned; it is therefore in the range of hundredths of a millimeter up to a few tenths of a millimeter.
  • FIG. 2 shows an enlarged representation of a plastic insert 13 with a solid edge 17 and a closure 15 with a collar 25 directed towards the interior of the container.
  • the diameter D of the collar 25 on the free edge 27 is larger than the diameter d of the opening 3 or the diameter of the plastic insert 13 at the predetermined breaking point.
  • the diameter D of the collar 25 preferably increases toward the free edge 27.
  • a bead 31 is attached to the collar 25 according to FIG. 3, the diameter E of which is larger than that Diameter d of the opening 3.
  • the bead 31 can run completely; it can also be attached only in sections, e.g. on the "narrow sides" of the closure 15 (see FIG. 6).
  • the web 21 serving as a predetermined breaking point and the edge 17 are designed to be significantly finer in this example than the closure 15.
  • the plastic inserts 13 described above with integrated reclosure 15 and reinforcing edge 17 for snapping are very simple and inexpensive to manufacture in Spritzgussver.
  • the subsequent assembly can be carried out in a continuous process with the material for the cover 1 and the tear-open tabs 19, which is supplied in the form of a tape, using conventional machines.
  • the strip-shaped material 2 for the cover 1 which is brought to a punching and punching machine 35, is unwound from a coil 33 and the opening 3 is punched out. Then, again from coil 37, the tear-open tab 19 is punched out and brought from below to the perforated cover 1 and positioned thereon and initially stapled by means of sealing points.
  • the plastic inserts 13 are individually removed from a stack 41 and inserted into the opening 3 and stapled.
  • the plastic insert 13 is sealed along the edge 17 with the sealing layer 7 of the material 2 for the lid 1 and the reclosure 15 with the tear-open tab 19.
  • the tape 2 provided with the ready-to-use closures 13 and the tear-open tabs 19 can now be wound up and delivered to the consumer in tape form or can be fed directly to a punching machine for punching out the cover 1.
  • plastic insert 13 could also be applied first and the tear-open tab 19 sealed with the closure 15 and the cover 1 only afterwards.
  • the tear-open tab 19 is pulled up on the loose tab 23 and peeled off from the lid 1.
  • the seal or adhesive bond between the tear tab 19 and the closure 15 is not detachable. For this reason, the closure 15 is also raised when the tab 23 is pulled up further.
  • the web 21 breaks, i.e. the predetermined breaking point, and the closure 15 remains on the tear tab 19.
  • the edge 17 remains on the inside of the lid 1 and forms a circumferential reinforcement of the opening 3 and at the same time serves as a catch when the closure 15 is pushed back into the opening 3 in order to close the container 29 again.
  • the bead 31 (cf. FIG. 3) can, for example, only be attached along the arcuate sections, so that the closure 15 snaps into place and is held in place.

Abstract

1. A lid of a laminate material with an opening sealed with a tear-off strip, characterized in that a plastics insert (13) having a rim (17) is inserted into the stamped out opening (3) in the lid (1) and the rim (17) of the plastics insert (13) which extends into the region adjacent to the opening (3) and overlaps the opening (3) is bonded or sealed to the lid (1) and that an intended point of fracture is located between the rim (17) and the central portion of the plastics insert (13) forming the seal (15) in the form of a thin connection (21) and in that the tear-off strip covering the opening (3) from above is sealed to the seal (15) and the region of the lid (1) surrounding the seal (15), wherein the connection with the seal (15) cannot be released and the connection with the lid (1) can be peeled apart.

Description

Gegenstand der Erfindung ist ein Deckel aus einem Verbundmaterial mit einer von einer Aufreisslasche verschlossenen Öffnung gemäss Oberbegriff des Patentanspruches 1.The invention relates to a lid made of a composite material with an opening closed by a pull tab according to the preamble of patent claim 1.

Gegenstand der Erfindung ist weiter ein Verfahren zur Herstellung eines Deckels mit einer von einer Aufreisslasche verschlossenen Öffnung gemäss Oberbegriff des Patentanspruches 8.The invention further relates to a method for producing a lid with an opening closed by a pull tab according to the preamble of claim 8.

Deckel aus einem Verbundmaterial, d.h. aus mehreren Schichten, insbesondere thermoplastischer Kunststoffe, in die eine Aluminiumfolie als Gas- und Lichtschutz eingebettet ist und die eine Trink- oder Ausgussöffnung aufweisen, sind bekannt.Composite material lid, i.e. Known from several layers, in particular thermoplastics, in which an aluminum foil is embedded as gas and light protection and which have a drinking or pouring opening.

Beim Ausstanzen der Trinköffnung wird entlang der Stanzkante das Aluminium der Aluminiumfolie freigelegt und kann mit dem Füllgut in Berührung kommen. Bei agressiven Füllgütern, wie Fruchtsäften, kann das Aluminium korrodieren und zur Kontaminierung des Inhaltes führen.When the drinking opening is punched out, the aluminum of the aluminum foil is exposed along the punched edge and can come into contact with the filling material. In the case of aggressive filling goods, such as fruit juices, the aluminum can corrode and lead to contamination of the contents.

Aus der europäischen Patentanmeldung Nr. 135 431 ist ein Deckel aus Verbundmaterial bekannt, bei dem die ausgestanzte Trinköffnung von unten und von oben, d.h. beidseitig, mit einer Deck- oder Schutzschicht überklebt ist, um den Zutritt von agressiven Füllgütern an die freigelegte Aluminiumkante zu verhindern. Wenn ein solcher Behälter einmal geöffnet wird, ist ein Wiederverschluss mit dem herausgerissenen Lappen nicht mehr möglich.From European patent application No. 135 431 a lid made of composite material is known, in which the punched drinking opening from below and from above, i.e. is covered on both sides with a cover or protective layer to prevent aggressive substances from entering the exposed aluminum edge. Once such a container is opened, it can no longer be resealed with the rag torn out.

Hier will die Erfindung Abhilfe schaffen.The invention seeks to remedy this.

Die Erfindung stellt sich zur Aufgabe, eine Ausguss- und Trinköffnung zu schaffen, deren Kanten gegen Korrosion geschützt sind und bei welcher der die Trinköffnung verschliessende Teil des Deckels nach dem Aufreissen als Verschlusszapfen wieder verwendbar ist.The object of the invention is to create a pouring and drinking opening, the edges of which are protected against corrosion and in which the part of the lid which closes the drinking opening can be reused as a closure pin after being torn open.

Die Erfindung löst diese Aufgaben mit einem Deckel gemäss den kennzeichnenden Merkmalen des Patentanspruches 1 sowie durch ein Verfahren zu dessen Herstellung gemäss den kennzeichnenden Merkmalen des Patentanspruches 8.The invention solves these problems with a lid according to the characterizing features of patent claim 1 and by a method for its production according to the characterizing features of patent claim 8.

Die durch die Erfindung erreichten Vorteile sind im wesentlichen darin zu sehen, dass die Deckel in einem kontinuierlichen Herstellungsverfahren aus bandförmigem Material hergestellt werden können, wobei die mit Trink- oder Ausgussöffnungen und Wiederverschluss versehenen Deckelzuschnitte oder Nutzen bis zu deren Aufbringen auf den Behälter aneinanderhängend aufgerollt gelagert werden können.The advantages achieved by the invention are essentially to be seen in the fact that the lids can be produced in a continuous production process from band-shaped material, the lid blanks or the blanks provided with drinking or pouring openings and reclosure being stored rolled up until they are applied to the container can be.

Die Trinköffnung kann mit dem integrierten Verschlusszapfen immer wieder verschlossen werden, weil durch den an der Innenseite des Deckels verbleibenden, die Kante der Oeffnung verstärkenden Siegelrand diese eine Versteifung erhält.The drinking opening can be closed again and again with the integrated locking pin, because the sealing edge remaining on the inside of the lid and reinforcing the edge of the opening gives it a stiffening.

Weitere vorteilhafte Ausgestaltungen der Erfindung sind in den abhängigen Ansprüchen beschrieben.Further advantageous embodiments of the invention are described in the dependent claims.

Durch das Einsiegeln des Kunststoffeinsatzes von unten, d.h. von der Behälterinnenseite aus mit anschliessendem Versiegeln mit der Aufreisslasche, kann durch den die Oeffnung überlappenden Rand die Schnittkante entlang der Oeffnung gegen das Füllgut hin sicher abgedeckt werden.By sealing the plastic insert from below, i.e. from the inside of the container with subsequent sealing with the tear-open tab, the cut edge along the opening can be safely covered against the filling material by the edge overlapping the opening.

Beim Aufreissen des Deckels an der Lasche wird der zentrale Teil, der den Verschluss bildet, hochgehoben und entlang der Sollbruchstelle vom Rand abgelöst. Der die Oeffnung umgebende Bereich des Deckels ist von unten durch den am Deckel verbleibenden, die Oeffnung umgebenden Siegelrand geschützt.When the cover is torn open at the tab, the central part that forms the closure is lifted up and detached from the edge along the predetermined breaking point. The area of the lid surrounding the opening is protected from below by the sealing edge which remains on the lid and surrounds the opening.

Die kragenförmige Erweiterung des Verschlusses und der Rand am Verschluss ermöglichen einen guten Halt des Verschlusses inner halb der Oeffnung, wenn dieser nach dem erstmaligen Oeffnen wider auf den Deckel aufgesteckt wird.The collar-shaped extension of the closure and the edge on the closure enable the closure to be held securely within the opening if it is re-attached to the lid after the first opening.

Der gegenüber der Oberfläche des Verschlusses um die Dicke des Deckels zurück- oder abgesetzte Rand ermöglicht das gleichzeitige Versiegeln der Aufreisslasche mit dem Deckel und der Oberfläche des Verschlusses.The edge set back or offset from the surface of the closure by the thickness of the cover enables the tear-open tab to be sealed to the cover and the surface of the closure at the same time.

Anhand eines illustrierten Ausführungsbeispieles wird die Erfindung näher erläutert. Es zeigen:

  • Figur 1 einen Querschnitt durch einen Deckel,
  • Figur 2 einen Querschnitt durch die Trinköffnung eines Deckels (in vergrösserter Darstellung),
  • Figur 3 einen Querschnitt durch eine Sollbruchstelle und hier integrierten Wiederverschluss,
  • Figuren 4/5 ein Detail der Sollbruchstelle am Wiederverschluss, wobei Fig. 5 eine Variante darstellt,
  • Figur 6 eine Draufsicht auf einen vergrössert dargestellten Wiederverschluss und
  • Figur 7 eine schematische Darstellung des Herstellungsablaufes des Deckels.
The invention is explained in more detail using an illustrated exemplary embodiment. Show it:
  • FIG. 1 shows a cross section through a cover,
  • FIG. 2 shows a cross section through the drinking opening of a lid (in an enlarged view),
  • FIG. 3 shows a cross section through a predetermined breaking point and reclosure integrated here,
  • 4/5 shows a detail of the predetermined breaking point at the reclosure, FIG. 5 showing a variant,
  • FIG. 6 shows a plan view of a reclosure shown on an enlarged scale and
  • Figure 7 is a schematic representation of the manufacturing process of the cover.

Der in Figur 1 dargestellte Deckel 1 auf einem Behälter 29 (in gebrochenen Linien andeutungsweise gezeigt) mit einer wiederverschliessbaren Oeffnung 3 besteht aus Aluminium oder aus einem Verbundmaterial, welche beispielsweise als Gas- und Lichtschutz eine Aluminiumfolie 5, als Siegelschicht 7 einen heissiegelfähigen Kunststoff, wie Surlyn von Dupont de Nemour, und als Deckschicht 9 einen reissfesten Kunststoff aufweisen. In die Oeffnung 3, deren Kante 11 beim Ausstanzen der Alufolie völlig freigelegt worden ist, ist ein Kunststoffeinsatz 13 eingesetzt, welcher nach dem Aufreissen sowohl den Wiederverschluss 15, kurz Verschluss 15, als auch den Verstärkungsrand 17, kurz Rand 17, bildet, in den der Verschluss 15 einsteckbar ist. Der Rand 17 ist von unten fest mit dem Deckel versiegelt. Ueber der Oeffnung 3 ist eine dünne Aufreisslasche 19 sowohl mit dem Deckel 1 als auch mit dem Verschluss 15 unlösbar verbunden. Damit eine ebene Siegelfläche entsteht, ist der Rand 17 gegenüber der Oberfläche des Verschlusses 15 um die Dicke e des Deckels 1 zurückversetzt.The lid 1 shown in Figure 1 on a container 29 (shown in broken lines) with a reclosable opening 3 consists of aluminum or a composite material which, for example as gas and light protection, an aluminum foil 5, as a sealing layer 7 a heat-sealable plastic, such as Surlyn by Dupont de Nemour, and have a tear-resistant plastic as cover layer 9. In the opening 3, the edge 11 of which has been completely exposed during the punching out of the aluminum foil, a plastic insert 13 is inserted which, after being torn open, forms both the reclosure 15, short closure 15, and the reinforcing edge 17, short edge 17, in the the closure 15 can be inserted. The edge 17 is firmly sealed from below with the lid. Via the opening 3, a thin tear-open tab 19 is inseparably connected to both the lid 1 and the closure 15. So that a flat sealing surface is created, the edge 17 is set back by the thickness e of the cover 1 relative to the surface of the closure 15.

Die Verbindung der drei Teile kann durch gegenseitige Versiegelung erfolgen.The three parts can be connected by mutual sealing.

Der Verschluss 15 und der Rand 17 sind durch einen Steg 21 verbunden, der als Sollbruchstelle dient und beim Anheben des Verschlusses 15 mit der Aufreisslasche 19, die vorzugsweise an einer Stelle einen vom Deckel 1 leicht abhebbaren Lappen 23 aufweist, bricht. Je nach der Festigkeit des Materiales, aus dem der Kunststoffeinsatz 13 hergestellt ist, ist die Dicke des Steges 21 zu bemessen; sie liegt demnach im Bereich von Hunderstelmillimetern bis zu einigen Zehntelsmillimetern.The closure 15 and the edge 17 are connected by a web 21, which serves as a predetermined breaking point and breaks when the closure 15 is lifted with the tear-open tab 19, which preferably has a tab 23 that can be easily lifted off the lid 1 at one point. Depending on the strength of the material from which the plastic insert 13 is made, the thickness of the web 21 must be dimensioned; it is therefore in the range of hundredths of a millimeter up to a few tenths of a millimeter.

In Figur 2 ist in vergrösserter Darstellung ein Kunststoffeinsatz 13 mit einem massiven Rand 17 und einem Verschluss 15 mit einem gegen das Behälterinnere gerichteten Kragen 25 gezeigt. Der Durchmesser D des Kragens 25 ist an der freien Kante 27 grösser als der Durchmesser d der Oeffnung 3 bzw. der Durchmesser des Kunststoffeinsatzes 13 an der Sollbruchstelle. Vorzugsweise nimmt der Durchmesser D des Kragens 25 zur freien Kante 27 hin zu.FIG. 2 shows an enlarged representation of a plastic insert 13 with a solid edge 17 and a closure 15 with a collar 25 directed towards the interior of the container. The diameter D of the collar 25 on the free edge 27 is larger than the diameter d of the opening 3 or the diameter of the plastic insert 13 at the predetermined breaking point. The diameter D of the collar 25 preferably increases toward the free edge 27.

Damit der Verschluss 15 nach dessen Abtrennung vom Rand 17 auf den zu verschliessenden Behälter 29 (in Figur 1 in gebrochener Linie angedeutet) wieder sicher einrasten kann, ist am Kragen 25 gemäss Figur 3 aussen ein Wulst 31 angebracht, dessen Durchmesser E grösser ist als der Durchmesser d der Oeffnung 3. Der Wulst 31 kann vollständig umlaufen; er kann auch nur in Teilstücken angebracht sein, z.B. an den "Schmalseiten" des Verschlusses 15 (vgl. Figur 6). Der als Sollbruchstelle dienende Steg 21 und der Rand 17 sind in diesem Beispiel bedeutend feiner gestaltet als der Verschluss 15.So that the closure 15 can be securely locked again after it has been separated from the edge 17 onto the container 29 to be closed (indicated by a broken line in FIG. 1), a bead 31 is attached to the collar 25 according to FIG. 3, the diameter E of which is larger than that Diameter d of the opening 3. The bead 31 can run completely; it can also be attached only in sections, e.g. on the "narrow sides" of the closure 15 (see FIG. 6). The web 21 serving as a predetermined breaking point and the edge 17 are designed to be significantly finer in this example than the closure 15.

Die vorstehend beschriebenen Kunststoffeinsätze 13 mit integriertem Wiederverschluss 15 und Verstärkungsrand 17 zum Einrasten sind sehr einfach und kostengünstig im Spritzgussver fahren herzustellen. Die anschliessende Montage kann im Durchlauf mit dem bandförmig angelieferten Material für die Deckel 1 und die Aufreisslaschen 19 mit herkömmlichen Maschinen erfolgen.The plastic inserts 13 described above with integrated reclosure 15 and reinforcing edge 17 for snapping are very simple and inexpensive to manufacture in Spritzgussver. The subsequent assembly can be carried out in a continuous process with the material for the cover 1 and the tear-open tabs 19, which is supplied in the form of a tape, using conventional machines.

In der Figur 7 ist der Arbeitsablauf bei der Herstellung schematisch dargestellt. Die einzelnen Maschinen, die in den Herstellungsprozess integriert sind, sind nicht Gegenstand dieser Erfindung und werden deshalb auch nicht näher beschrieben.In Figure 7, the workflow in production is shown schematically. The individual machines that are integrated in the manufacturing process are not the subject of this invention and are therefore not described in more detail.

Von einem Coil 33 wird das zu einer Loch- und Stanzmaschine 35 herangeführte bandförmige Material 2 für den Deckel 1 abgewickelt und die Oeffnung 3 ausgestanzt. Anschliessend wird - wiederum ab Coil 37 - aus einem Band die Aufreisslasche 19 ausgestanzt und von unten an den gelochten Deckel 1 herangeführt und auf diesen positioniert und vorerst mittels Siegelpunkten geheftet.The strip-shaped material 2 for the cover 1, which is brought to a punching and punching machine 35, is unwound from a coil 33 and the opening 3 is punched out. Then, again from coil 37, the tear-open tab 19 is punched out and brought from below to the perforated cover 1 and positioned thereon and initially stapled by means of sealing points.

In der folgenden Arbeitsstation 39 werden die Kunststoffeinsätze 13 einzeln einem Stapel 41 entnommen und in die Oeffnung 3 eingelegt und geheftet.In the following work station 39, the plastic inserts 13 are individually removed from a stack 41 and inserted into the opening 3 and stapled.

In der Arbeitsstation 43 wird der Kunststoffeinsatz 13 entlang dem Rand 17 mit der Siegelschicht 7 des Materials 2 für den Deckel 1 und der Wiederverschluss 15 mit der Aufreisslasche 19 versiegelt.In the work station 43, the plastic insert 13 is sealed along the edge 17 with the sealing layer 7 of the material 2 for the lid 1 and the reclosure 15 with the tear-open tab 19.

Das mit den fertig eingesetzten Verschlüssen 13 und den Aufreisslaschen 19 versehene Band 2 kann nun aufgewickelt und in Bandform an den Verbraucher abgegeben oder direkt an eine Stanzmaschine zum Ausstanzen der Deckel 1 geführt werden.The tape 2 provided with the ready-to-use closures 13 and the tear-open tabs 19 can now be wound up and delivered to the consumer in tape form or can be fed directly to a punching machine for punching out the cover 1.

Selbstverständlich liesse sich auch zuerst der Kunststoffeinsatz 13 aufbringen und erst nachträglich die Aufreisslasche 19 mit dem Verschluss 15 und dem Deckel 1 versiegeln.Of course, the plastic insert 13 could also be applied first and the tear-open tab 19 sealed with the closure 15 and the cover 1 only afterwards.

Zum Oeffnen eines Behälters 29 mit einer eingesetzten Verschlusseinheit 13 wird die Aufreisslasehe 19 am losen Lappen 23 hochgezogen und vom Deckel 1 abgeschält. Die Versiegelung oder Verklebung zwischen der Aufreisslasche 19 und dem Verschluss 15 ist unlösbar. Aus diesem Grunde wird beim weiteren Hochziehen der Lasche 23 auch der Verschluss 15 angehoben. Beim Anheben bricht der Steg 21, d.h. die Sollbruchstelle, und der Verschluss 15 bleibt an der Aufreisslasche 19 hängen. Der Rand 17 verbleibt innen am Deckel 1 und bildet eine umlaufende Verstärkung der Oeffnung 3 und dient gleichzeitig als Raste, wenn der Verschluss 15 in die Oeffnung 3 zurückgesteckt wird, um den Behälter 29 wieder zu verschliessen.To open a container 29 with an inserted closure unit 13, the tear-open tab 19 is pulled up on the loose tab 23 and peeled off from the lid 1. The seal or adhesive bond between the tear tab 19 and the closure 15 is not detachable. For this reason, the closure 15 is also raised when the tab 23 is pulled up further. When lifting, the web 21 breaks, i.e. the predetermined breaking point, and the closure 15 remains on the tear tab 19. The edge 17 remains on the inside of the lid 1 and forms a circumferential reinforcement of the opening 3 and at the same time serves as a catch when the closure 15 is pushed back into the opening 3 in order to close the container 29 again.

In der Ausgestaltung der Erfindung gemäss Figur 6, d.h. mit einer tropfenförmigen Oeffnung 3, kann der Wulst 31 (vgl. Figur 3) beispielsweise nur entlang der bogenförmigen Abschnitte angebracht sein, damit der Verschluss 15 an diesen Abschnitten einrastet und festgehalten wird.In the embodiment of the invention according to Figure 6, i.e. with a drop-shaped opening 3, the bead 31 (cf. FIG. 3) can, for example, only be attached along the arcuate sections, so that the closure 15 snaps into place and is held in place.

Claims (9)

1. A lid of a laminate material with an opening sealed with a tear-off strip, characterised in that a plastics insert (13) having a rim (17) is inserted into the stamped out opening (3) in the lid (1) and the rim (17) of the plastics insert (13) which extends into the region adjacent to the opening (3) and overlaps the opening (3) is bonded or sealed to the lid (1) and that an intended point of fracture is located between the rim (17) and the central portion of the plastics insert (13) forming the seal (15) in the form of a thin connection (21) and in that the tear-off strip covering the opening (3) from above is sealed to the seal (15) and the region of the lid (1) surrounding the seal (15), wherein the connection with the seal (15) cannot be released and the connection with the lid (1) can be peeled apart.
2. A lid according to claim 1, characterised in that the seal (15) has a collar (25) along the connection (21), the free edge (27) of which projects over the surface of the lid (1).
3. A lid according to one of claims 1 or 2, characterised in that the rim (17) is thicker than the connection (21) at the intended point of fracture.
4. A lid according to one of claims 1 or 2, characterised in that an outwardly directed circumferential or partly circumferential bead (31) is provided on the collar (25).
5. A lid according to one of claims 2 to 4, characterised in that the diameter (d) of the opening (3) is smaller than the diameter (D) of the collar (25) at the edge (27) or at the bead (31).
6. A lid according to one of the foregoing claims, characterised in that the upper edge of the rim (17) is offset from the surface of the seal (15) by the thickness (e) of the lid (1).
7. A lid according to one of claims 2, 3 and 6, characterised in that the diameter of the collar (25) increases continuously towards the edge (27).
8. A process for the manufacture of a lid having an opening sealed by a tear-off strip, characterised in that
a) an opening (3) is stamped out from a sealing material in strip form,
b) a tear-off strip (19) is sealed on the opening (3),
c) a plastics insert (13) is placed in the opening, and
d) the plastics insert (13) in the central part forming the seal (15) is sealed to the tear-off strip (19) and the rim (17) of the plastics insert is sealed to the lid (1).
9. A process according to claim 8, characterised in that stamping out of the opening (3), insertion of the plastics insert (13) and tear-off strip (19) and their sealing to the lid (1) take place before the lid (1) is stamped out from the strip (2).
EP86810402A 1985-10-04 1986-09-04 Lid made of laminate with an opening closed by a strip member,and method for making it Expired EP0221843B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86810402T ATE44008T1 (en) 1985-10-04 1986-09-04 COMPOSITE LID HAVING AN OPENING CLOSED BY A TEAR TAB AND METHOD OF MAKING SAME.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH429485 1985-10-04
CH4294/85 1985-10-04

Publications (2)

Publication Number Publication Date
EP0221843A1 EP0221843A1 (en) 1987-05-13
EP0221843B1 true EP0221843B1 (en) 1989-06-14

Family

ID=4273411

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86810402A Expired EP0221843B1 (en) 1985-10-04 1986-09-04 Lid made of laminate with an opening closed by a strip member,and method for making it

Country Status (3)

Country Link
EP (1) EP0221843B1 (en)
AT (1) ATE44008T1 (en)
DE (1) DE3663925D1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013003154B3 (en) * 2013-02-25 2014-01-16 Euro-Cap Gmbh can closure
DE102015000914B3 (en) * 2015-01-26 2015-09-24 Euro-Cap Gmbh Can closure, especially for a milk can

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1389351A (en) * 1971-11-23 1975-04-03 Nat Can Corp Easy opening containers

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3623628A (en) * 1970-02-04 1971-11-30 Microdot Inc Oil filler plug
EP0038142A1 (en) * 1980-04-15 1981-10-21 METAL BOX p.l.c. Closures for containers
US4410101A (en) * 1981-01-12 1983-10-18 Vogt Kuno J Easy opening top closure member assembly for a container
FR2551031B1 (en) * 1983-08-24 1986-07-04 Alsacienne Aluminium CONTAINER WITH PELING OPENING AND PROCESS FOR PRODUCING CLOSING ELEMENTS OF SUCH CONTAINERS

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1389351A (en) * 1971-11-23 1975-04-03 Nat Can Corp Easy opening containers

Also Published As

Publication number Publication date
EP0221843A1 (en) 1987-05-13
DE3663925D1 (en) 1989-07-20
ATE44008T1 (en) 1989-06-15

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