EP1608564B1 - Can with a foil cover - Google Patents

Can with a foil cover Download PDF

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Publication number
EP1608564B1
EP1608564B1 EP04719960A EP04719960A EP1608564B1 EP 1608564 B1 EP1608564 B1 EP 1608564B1 EP 04719960 A EP04719960 A EP 04719960A EP 04719960 A EP04719960 A EP 04719960A EP 1608564 B1 EP1608564 B1 EP 1608564B1
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EP
European Patent Office
Prior art keywords
bead
membrane
edge
seam
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
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EP04719960A
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German (de)
French (fr)
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EP1608564A1 (en
Inventor
Werner Grabher
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Individual
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Individual
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Priority to EP04719960A priority Critical patent/EP1608564B1/en
Publication of EP1608564A1 publication Critical patent/EP1608564A1/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D77/00Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/10Container closures formed after filling
    • B65D77/20Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
    • B65D77/2024Container 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D51/00Closures not otherwise provided for
    • B65D51/18Arrangements of closures with protective outer cap-like covers or of two or more co-operating closures
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D77/00Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/10Container closures formed after filling
    • B65D77/20Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
    • B65D77/2024Container 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
    • B65D77/2028Means for opening the cover other than, or in addition to, a pull tab
    • B65D77/2032Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D2251/00Details relating to container closures
    • B65D2251/0003Two or more closures
    • B65D2251/0006Upper closure
    • B65D2251/0018Upper closure of the 43-type
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D2251/00Details relating to container closures
    • B65D2251/0003Two or more closures
    • B65D2251/0068Lower closure
    • B65D2251/0093Membrane

Definitions

  • the invention relates to a can with a membrane closure, in which a closure membrane is sealed on a peripheral in the head region of the can jacket fully circumferential bead to effectively counteract the peel forces caused by the contact surface of the membrane with the can jacket in the event of an occurring inside the can overpressure to act.
  • Cans are resealable by means of a closure after opening, others, especially disposable cans, are emptied after opening and, depending on the material from which they are made, are disposed of as waste.
  • Cans are usually made of cardboard, plastic or a thin sheet metal material.
  • a membrane film As a closure material for cans, a membrane film, usually made of paper or aluminum, is often used. There are a large number of known solutions, of which only a few types are to be listed here. Frequently, a membrane foil in the form of a plate closing the can opening with projecting collar is sealed by means of this collar in the region of the can opening to the inner wall of the can.
  • a membrane foil in the form of a plate closing the can opening with projecting collar is sealed by means of this collar in the region of the can opening to the inner wall of the can.
  • EP 0 700 838 a can with a slightly upwards opening in the head area, a conical can jacket, to which a sealing membrane is sealed inside.
  • CH 564456A a can according to the preamble of claim 1, with a membrane closure and a curb extending circumferentially on the edge of the can forms a bead on the inside of the can, whose task is to cooperate with a Einsteckdeckel in the form of a snap closure.
  • the membrane is in a subsequent to the bead Solltrenn Scheme sealingly connected to the cylindrical part of the can inner wall.
  • the invention has therefore set itself the goal of the stated disadvantages of the known prior art in cans with membrane closures remove.
  • the object is achieved according to the invention, especially by providing a can, in the head area, just below the can edge, preferably at a distance of 1 to a maximum of 10 mm below the edge of the can, extending over the entire circumference of the can, inwardly directed bead on whose top is sealed a sealing membrane.
  • top is to be understood in this context, the edge of the can side facing the bead.
  • bottom is the inside of the cans facing side of the bead to understand.
  • the bead according to the invention has a sufficient axial extent and, where appropriate, can be produced by rolling in a single operation, in a manner known per se. It can also hardly feather when sealing the sealing membrane, such as a membrane film. As a result, the connection of the can-closing membrane membrane is made more stable with the can jacket and still not difficult the tearing of the membrane film. Due to the inventive design of the bead after the FIGS. 1 and 3b In addition, the can is easily as good as completely empty and the weakening of the can jacket remains minimal. The arrangement of the bead directly or just below the edge of the can, the inner volume of the can is fully utilized to the upper limit of possibility.
  • the present invention relates to a can with a membrane closure which, in the region of the can opening, preferably at a distance of 1 to 10 mm from the edge of the can, has a bead running around the entire circumference of the can in the can jacket, which is provided with a closure membrane, for example a membrane foil. in particular a tear-open film, is sealingly connected and wherein the can opening to the can or edge facing upper part and pointing to the can interior lower part of the bead - viewed vertically mounted box - equally or alternately either horizontally or obliquely inwards.
  • any combination of horizontal and / or oblique bead upper and lower part is within the scope of the present invention.
  • the dense bond between sealing membrane and can bead can be achieved by suitable measures such as by gluing or heat sealing.
  • the membrane film which may preferably be made of paper or aluminum, with the obliquely or horizontally extending top of the bead either with the help of applied adhesive on this part - either fresh or after its cooling in a later episode by heat - tight to connect, or to seal using a heat seal layer applied to the film.
  • this also ensures a better retention of the membrane film against unwanted removal (peeling) of the film from the bead from the inside, because in the direction of lifting of the adhesive surface only part of the upward, internal force is effective.
  • An Indian Fig. 1 illustrated can jacket 1 has at its upper edge of the can 8 a bead 4. Somewhat below the upper edge of the can 8, ie preferably at a distance of 1 to 10 mm from the edge of the can, an inwardly facing, semicircular bead 3 is formed. On the to upper edge of the can 8 facing side 3a of the bead 3 is in a conventional manner, a membrane film 5 sealed 2, which may have a known tear tab, not shown. According to the invention, however, the membrane film is at least partially sealed to the top of the bead, preferably both at the top of the bead and at the adjoining, rectilinear portion of the can inner wall.
  • the can body 1 is provided with a triangular bead 3, the edges or transitions in the can jacket, however, are preferably rounded.
  • a membrane film 5 is sealed. 2. Because this section runs obliquely, the internal force acting on the membrane film 5 and originating from the can pressure is only partially effective as a peeling force. Thus, the metal foil 5 can afford greater resistance to unwanted and unwanted detachment.
  • the can jacket 1 can also be completed with a lid 7, which is held in a form-fitting manner at the upper edge of the can 8, by engaging over the edge of the can 8 and preferably at least partially engages with a bead 6 in the bead 3.
  • the embodiment allows according to Fig. 3b with a sloping bottom 3b of the bead 3 a residue-free, complete emptying of the contents of the can.
  • the curvature of the bead between the - when erected box - horizontally extending, rectilinear upper part 3a to the oblique lower part 3b can be both edged and rounded.
  • the oblique lower part 3b can be both rectilinear and curved, wherein the angle relative to the - when erected box - horizontal, straight upper part 3a of the bead 3 is of minor importance and any deviation of the lower part 3b from a horizontal course a complete emptying the can relieved.
  • the bead according to the invention may, for example, have a clear (axial) height of 50%, optionally about 100 to 150% of its radial depth. But she can also do one Have lower clear height, in particular in the case of a - with upright box - horizontally extending top 3a of the bead 3 according to the FIGS. 3a and 3b ,

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Materials For Medical Uses (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Laminated Bodies (AREA)
  • Packages (AREA)

Abstract

A can includes a membrane seal (5), which has a continuous bead (3) in the can casing (1), the bead facing inwards in the vicinity of the can edge (8), preferably at a distance of between 1 and 10 mm from the edge. The bead is connected in a sealed manner to a sealing membrane (5), for example a foil membrane, in particular a tear-open foil. The upper part (3a) of the bead facing the can edge and the lower part (3b) of the bead facing the interior of the can, viewed when the can is upright, extend inwards either horizontally or obliquely in a uniform or alternating manner. The bead (3) can have an approximately semi-circular or triangular cross-section and preferably has an oblique lower part (3b) in order to completely empty the can. In one embodiment, a lid (7) engages in a positive fit with the bead (3) by an edge thickening (6).

Description

TECHNISCHES GEBIETTECHNICAL AREA

Die Erfindung bezieht sich auf eine Dose mit Membranverschluss, bei der eine Verschlussmembran auf einer im Kopfbereich des Dosenmantels vollumfänglich umlaufenden Sicke angesiegelt ist, um im Falle eines im Inneren der Dose auftretenden Überdruckes den dadurch verursachten Schälkräften auf die Kontaktfläche der Membran mit dem Dosenmantel wirksam entgegen zu wirken.The invention relates to a can with a membrane closure, in which a closure membrane is sealed on a peripheral in the head region of the can jacket fully circumferential bead to effectively counteract the peel forces caused by the contact surface of the membrane with the can jacket in the event of an occurring inside the can overpressure to act.

HINTERGRUND DER ERFINDUNGBACKGROUND OF THE INVENTION

Manche Dosen sind mittels eines Verschlusses nach ihrem Öffnen wieder verschließbar, andere, insbesondere Einwegdosen, werden nach ihrem Öffnen entleert und, je nach dem Material, aus dem sie gefertigt wurden, als Abfälle beseitigt. Dosen werden in der Regel aus Karton, aus Kunststoff oder aus einem dünnen Blechmaterial hergestellt.Some cans are resealable by means of a closure after opening, others, especially disposable cans, are emptied after opening and, depending on the material from which they are made, are disposed of as waste. Cans are usually made of cardboard, plastic or a thin sheet metal material.

Als Verschlussmaterial für Dosen wird oft eine Membranfolie, in der Regel aus Papier oder aus Aluminium, verwendet. Dafür gibt es eine große Anzahl von bekannten Lösungen, von denen hier nur einige Typen aufgezählt werden sollen. Häufig wird eine Membranfolie in Form eines die Dosenöffnung verschliessenden Tellers mit abstehendem Kragen mittels dieses Kragens im Bereich der Dosenöffnung an die Doseninnenwand gesiegelt. So offenbart beispielsweise EP 0 700 838 eine Dose mit einem im Kopfbereich leicht nach oben hin öffnenden, konischen Dosenmantel, an den inwendig eine Verschlussmembran angesiegelt wird. Ziel der EP 0 700 838 ist es, einerseits herkömmliche Blechdeckel durch eine Membran zu ersetzen und andererseits von einer rein vertikalen Ansiegelung der Membran an die Doseninnenwand und den damit verbundenen technischen Schwierigkeiten bei Verwendung U-förmig vorgeformter Membranen im Zusammenhang mit toleranzbedingten Durchmesserschwankungen der Dosen weg zu kommen.As a closure material for cans, a membrane film, usually made of paper or aluminum, is often used. There are a large number of known solutions, of which only a few types are to be listed here. Frequently, a membrane foil in the form of a plate closing the can opening with projecting collar is sealed by means of this collar in the region of the can opening to the inner wall of the can. For example, disclosed EP 0 700 838 a can with a slightly upwards opening in the head area, a conical can jacket, to which a sealing membrane is sealed inside. goal of EP 0 700 838 It is, on the one hand to replace conventional metal cover by a membrane and on the other hand come from a purely vertical sealing of the membrane to the inner wall of the can and the associated technical difficulties when using U-shaped preformed membranes in connection with tolerance-related diameter variations of the cans away.

Bei der Ausübung eines Drucks von innen auf die Membran, z.B. beim Befüllen der Dose oder beim Transport im Flugzeug, kommt es zur Einwirkung einer Schälkraft auf die Verbindung der Membranfolie mit dem Flansch. Die Verbindung muss daher verhältnismäßig stark ausgebildet werden, um der Schälkraft entgegen wirken zu können, was aber wiederum das Aufreissen der Folie erschwert.When exerting a pressure from the inside of the membrane, for example when filling the can or during transport in the aircraft, it comes to the effect of a peel force on the connection of the membrane film with the flange. The Connection must therefore be made relatively strong in order to counteract the peel force, which in turn makes it difficult to rupture the film.

Während Sicken im Dosenmantel bisher meist als Verletzungsschutz bei Ringpull-Blechdeckeln zum Einsatz gelangt sind, sind im Stand der Technik nur wenige Dosen mit einer Sicke für andere Zwecke bekannt geworden, die sich jedoch von der Erfindung durch andere Aufgabenstellung und andere Massnahmen unterscheiden. So will z.B. die FR 917 018 eine fixe Position für den Membranteller sicherstellen und verwendet dafür eine Sicke als Anschlag für den Membrankragen beim Einsiegeln. Die GB 532 834 wiederum will eine Dose mit einer Membranscheibe verschliessen. Der nach innen gerollte Dosenrand hält den auf dem horizontalen Sickenteil aufliegenden Scheibenrand.While beads in the can jacket have so far mostly been used as injury protection in Ringpull sheet metal lids, in the prior art only a few cans with a bead for other purposes have become known, but differ from the invention by other task and other measures. So wants the example FR 917 018 ensure a fixed position for the diaphragm plate and uses a bead as a stop for the diaphragm collar during sealing. The GB 532,834 again, wants to close a box with a membrane disc. The inward rolled edge of the can holds the disc rim resting on the horizontal bead.

Eine andere Art von Dosen mit einer Sicke und mit einem Membranverschluss zeigt das Dokument CH-A5-643.502 . Bei dieser bekannten Lösung ist die Öffnung der Dose mit einer Membran abgedeckt, die auf einem umlaufenden, aus dem Dosenmantelmaterial flachgepressten Flansch aufgesiegelt ist. Ein solcher Flansch weist eine Fülle von Nachteilen auf und hat sich daher in der Praxis überhaupt nicht durchsetzen können: er ist schwierig, nämlich nur in mehreren Arbeitsgängen herzustellen; er schwächt durch die starken Knickungen das Dosenmantelmaterial; er behindert das rückstandsfreie Entleeren der Dose; er gibt beim Aufsiegeln der Membran federnd nach. Bei einer Ausführungsform ist eine zusätzliche Sicke vorgesehen, die dazu dient, dem Dosendeckel in dessen geschlossener Lage einen sicheren Halt am Dosenkörper zu gewährleisten, was noch aufwendiger in der Herstellung ist und noch mehr Material benötigt. Dieser zusätzliche Materialaufwand mag zwar bei einer einzelnen Dose geringfügig erscheinen, fällt aber bei Massenartikeln, wie derartige Dosen sind, doch ins Gewicht. Im Hinblick auf die starke Konkurrenz, die auf diesem Gebiet tätig ist, ist jeder noch so geringe Mehraufwand ein Nachteil, der nach Möglichkeit vermieden werden soll.Another type of can with a bead and a membrane closure shows the document CH-A5-643.502 , In this known solution, the opening of the can is covered with a membrane which is sealed on a circumferential, flat flattened from the can jacket material flange. Such a flange has a wealth of disadvantages and has therefore not been able to prevail in practice at all: it is difficult to produce, namely only in several operations; it weakens the can jacket material due to the strong buckling; it impedes the residue-free emptying of the can; it gives way resiliently when sealing the membrane. In one embodiment, an additional bead is provided, which serves to ensure the can lid in its closed position a secure hold on the can body, which is even more expensive to manufacture and requires even more material. While this additional cost of materials may seem marginal to a single can, it does matter in bulk items, such as those cans. In view of the fierce competition that exists in this area, any extra expense is a disadvantage that should be avoided if possible.

Und schliesslich offenbart CH 564456A eine Dose gemäss dem Oberbegriff des Anspruchs 1, mit Membranverschluss und einer am Dosenrand umfänglich verlaufenden Einwölbung, die an der Doseninnenseite einen Wulst bildet, dessen Aufgabe es ist, mit einem Einsteckdeckel in Form eines Schnappverschlusses zusamenzuwirken. Die Membran ist in einem an den Wulst anschliessenden Solltrennbereich mit dem zylindrischen Teil der Doseninnenwand dichtend verbunden.And finally revealed CH 564456A a can according to the preamble of claim 1, with a membrane closure and a curb extending circumferentially on the edge of the can forms a bead on the inside of the can, whose task is to cooperate with a Einsteckdeckel in the form of a snap closure. The membrane is in a subsequent to the bead Solltrennbereich sealingly connected to the cylindrical part of the can inner wall.

KURZE BESCHREIBUNG DER ERFINDUNGBRIEF DESCRIPTION OF THE INVENTION

Die Erfindung hat sich daher zum Ziel gesetzt, die angeführten Nachteile des bekannten Standes der Technik bei Dosen mit Membranverschlüssen zu beseitigen. Gelöst wird die Aufgabe erfindungsgemäss vor allem durch das Bereitstellen einer Dose, die im Kopfbereich, knapp unter dem Dosenrand, vorzugsweise in einem Abstand von 1 bis maximal 10 mm unter dem Dosenrand, eine über den gesamten Dosenumfang verlaufende, nach innen gerichtete Sicke aufweist, an deren Oberseite eine Verschlussmembran angesiegelt ist.The invention has therefore set itself the goal of the stated disadvantages of the known prior art in cans with membrane closures remove. The object is achieved according to the invention, especially by providing a can, in the head area, just below the can edge, preferably at a distance of 1 to a maximum of 10 mm below the edge of the can, extending over the entire circumference of the can, inwardly directed bead on whose top is sealed a sealing membrane.

Unter dem Begriff "Oberseite" ist in diesem Zusammenhang die dem Dosenrand zugewandte Seite der Sicke zu verstehen. Als "Unterseite" der Sicke ist die dem Doseninneren zugewandte Seite der Sicke zu verstehen.The term "top" is to be understood in this context, the edge of the can side facing the bead. As "bottom" of the bead is the inside of the cans facing side of the bead to understand.

Weiterbildungen und vorteilhafte Ausführungsformen der Erfindung sind in den Kennzeichen der abhängigen Ansprüche beschrieben.Further developments and advantageous embodiments of the invention are described in the characteristics of the dependent claims.

Die erfindungsgemässe Sicke weist eine ausreichende, axiale Erstreckung auf und ist gegebenenfalls - in an sich bekannter Weise - durch Rollen in einem einzigen Arbeitsgang herzustellen. Sie kann ausserdem beim Aufsiegeln der Verschlussmembran, beispielsweise einer Membranfolie, kaum mehr federn. Dadurch wird auch die Verbindung der die Dose verschliessenden Membranfolie mit dem Dosenmantel stabiler gestaltet und trotzdem das Aufreissen der Membranfolie nicht erschwert. Durch die erfindungsgemässe Ausbildung der Sicke nach den Figuren 1 und 3b ist die Dose ausserdem leicht so gut wie restlos zu entleeren und die Schwächung des Dosenmantels bleibt minimal. Durch die Anordnung der Sicke unmittelbar oder knapp unter dem Dosenrand wird das Innenvolumen der Dose bis zur oberen Grenze der Möglichkeit voll ausgenützt.The bead according to the invention has a sufficient axial extent and, where appropriate, can be produced by rolling in a single operation, in a manner known per se. It can also hardly feather when sealing the sealing membrane, such as a membrane film. As a result, the connection of the can-closing membrane membrane is made more stable with the can jacket and still not difficult the tearing of the membrane film. Due to the inventive design of the bead after the FIGS. 1 and 3b In addition, the can is easily as good as completely empty and the weakening of the can jacket remains minimal. The arrangement of the bead directly or just below the edge of the can, the inner volume of the can is fully utilized to the upper limit of possibility.

DETAILLIERTE BESCHREIBUNG DER ERFINDUNGDETAILED DESCRIPTION OF THE INVENTION

Die vorliegende Erfindung bezieht sich auf eine Dose mit einem Membranverschluss, welche im Bereich der Dosenöffnung, vorzugsweise in einem Abstand von 1 bis 10 mm vom Dosenrand, eine um den gesamten Dosenumfang verlaufende Sicke im Dosenmantel aufweist, welche mit einer Verschlussmembran, beispielsweise einer Membranfolie, insbesondere einer Aufreissfolie, dichtend verbunden ist und wobei der zur Dosenöffnung bzw. zum Dosenrand weisende Oberteil und der zum Doseninneren weisende Unterteil der Sicke - bei senkrecht aufgestellter Dose betrachtet - gleichermassen oder alternierend entweder horizontal oder schräg nach innen verlaufen. Prinzipiell liegt jede Kombination von horizontalem und/oder schrägem Sickenober- und Unterteil im Rahmen der vorliegenden Erfindung. Es ist allerdings bevorzugt, dass zumindest der Unterteil der Sicke schräg verläuft, um ein vollständiges Entleeren der Dose zu erleichtern. Der dichte Verbund zwischen Verschlussmembran und Dosensicke kann durch geeignete Massnahmen wie beispielsweise durch Kleben oder Heisssiegelung erzielt werden.The present invention relates to a can with a membrane closure which, in the region of the can opening, preferably at a distance of 1 to 10 mm from the edge of the can, has a bead running around the entire circumference of the can in the can jacket, which is provided with a closure membrane, for example a membrane foil. in particular a tear-open film, is sealingly connected and wherein the can opening to the can or edge facing upper part and pointing to the can interior lower part of the bead - viewed vertically mounted box - equally or alternately either horizontally or obliquely inwards. In principle, any combination of horizontal and / or oblique bead upper and lower part is within the scope of the present invention. However, it is preferred that at least the lower part of the bead runs obliquely to facilitate complete emptying of the can. The dense bond between sealing membrane and can bead can be achieved by suitable measures such as by gluing or heat sealing.

Erfindungsgemäss wird die Möglichkeit geschaffen, die Membranfolie, die bevorzugt aus Papier oder Aluminium bestehen kann, mit der schräg oder horizontal verlaufenden Oberseite der Sicke entweder mit Hilfe von auf diesem Teil aufgetragenen Klebstoff - entweder frisch oder nach dessen Erkalten in späterer Folge durch Hitze - dicht zu verbinden, bzw. mit Hilfe einer auf der Folie aufgetragenen Heissiegelschichte zu versiegeln. Dadurch wird aber auch eine bessere Halterung der Membranfolie gegen ein ungewolltes Entfernen (Abschälen) der Folie von der Sicke von innen her gewährleistet, weil in Richtung des Abhebens von der Haftfläche nur ein Teil der nach oben gerichteten, inneren Kraft wirksam ist.According to the invention, the possibility is created, the membrane film, which may preferably be made of paper or aluminum, with the obliquely or horizontally extending top of the bead either with the help of applied adhesive on this part - either fresh or after its cooling in a later episode by heat - tight to connect, or to seal using a heat seal layer applied to the film. However, this also ensures a better retention of the membrane film against unwanted removal (peeling) of the film from the bead from the inside, because in the direction of lifting of the adhesive surface only part of the upward, internal force is effective.

Weitere Merkmale, Vorteile und Einzelheiten der Erfindung werden nun anhand der Zeichnungen näher erläutert. Dabei zeigen:

Fig. 1
eine erste Ausführungsform mit einer Befestigung der Membranfolie auf einer halbkreisförmigen Sicke, sowie am senkrechten Teil der Doseninnenwand mit dem Kragen der Membranfolie; die
Fig. 2
eine Ausführungsform die nicht ein Teil der Erfindung ist, mit einer Befestigung der Membranfolie ohne Kragen an einer dreieckförmigen Sicke, die unmittelbar unter dem oberen Dosenrand angeordnet ist; und
Fig. 3a und 3b
weitere Ausführungsformen der erfindungsgemässen Sicke.
Further features, advantages and details of the invention will now be explained in more detail with reference to the drawings. Showing:
Fig. 1
a first embodiment with an attachment of the membrane film on a semicircular bead, and on the vertical part of the can inner wall with the collar of the membrane film; the
Fig. 2
an embodiment which is not part of the invention, with a fastening of the membrane film without collar on a triangular bead, which is located immediately below the upper edge of the can; and
Fig. 3a and 3b
Further embodiments of the inventive bead.

Ein in der Fig. 1 dargestellter Dosenmantel 1 weist an seinem oberen Dosenrand 8 eine Aufbördelung 4 auf. Etwas unterhalb des oberen Dosenrandes 8, d.h. vorzugsweise in einem Abstand von 1 bis 10 mm vom Dosenrand, ist eine nach innen weisende, halbkreisförmige Sicke 3 angeformt. Auf der zum oberen Dosenrand 8 weisenden Seite 3a der Sicke 3 ist in an sich bekannter Weise eine Membranfolie 5 aufgesiegelt 2, die eine an sich bekannte, nicht dargestellte Aufreisslasche aufweisen kann. Erfindungsgemäss ist die Membranfolie jedoch zumindest teilweise an der Oberseite der Sicke angesiegelt, vorzugsweise sowohl an der Oberseite der Sicke als auch am daran anschliessenden, geradlinigen Teil der Doseninnenwand.An Indian Fig. 1 illustrated can jacket 1 has at its upper edge of the can 8 a bead 4. Somewhat below the upper edge of the can 8, ie preferably at a distance of 1 to 10 mm from the edge of the can, an inwardly facing, semicircular bead 3 is formed. On the to upper edge of the can 8 facing side 3a of the bead 3 is in a conventional manner, a membrane film 5 sealed 2, which may have a known tear tab, not shown. According to the invention, however, the membrane film is at least partially sealed to the top of the bead, preferably both at the top of the bead and at the adjoining, rectilinear portion of the can inner wall.

Nach der Ausführungsform gemäß der Fig. 3 die nicht ein Teil der Erfindung ist, ist der Dosenkörper 1 mit einer dreieckförmigen Sicke 3 versehen, deren Kanten bzw. Übergänge in den Dosenmantel allerdings vorzugsweise abgerundet sind. An dem in Richtung zum oberen Dosenrand 8 weisenden Abschnitt 3a der Sicke 3 ist eine Membranfolie 5 angesiegelt 2. Dadurch, dass dieser Abschnitt schräg verläuft, ist die auf die Membranfolie 5 wirkende, aus dem Dosendruck stammende innere Kraft nur zum Teil als Schälkraft wirksam. Somit kann die Metallfolie 5 gegen ein ungewolltes und unerwünschtes Ablösen einen größeren Widerstand leisten. Der Dosenmantel 1 kann ausserdem mit einem Deckel 7 abgeschlossen sein, welcher am oberen Dosenrand 8 formschlüssig gehalten wird, indem er den Dosenrand 8 übergreift und vorzugsweise mit einem Randwulst 6 zumindest teilweise in die Sicke 3 eingreift.According to the embodiment according to the Fig. 3 which is not part of the invention, the can body 1 is provided with a triangular bead 3, the edges or transitions in the can jacket, however, are preferably rounded. At the section 3 a of the bead 3 pointing in the direction of the upper edge of the can 8, a membrane film 5 is sealed. 2. Because this section runs obliquely, the internal force acting on the membrane film 5 and originating from the can pressure is only partially effective as a peeling force. Thus, the metal foil 5 can afford greater resistance to unwanted and unwanted detachment. The can jacket 1 can also be completed with a lid 7, which is held in a form-fitting manner at the upper edge of the can 8, by engaging over the edge of the can 8 and preferably at least partially engages with a bead 6 in the bead 3.

Im Falle von Sicken gemäss den Ausführungsformen der Figuren 3a und 3b ist die durch einen Doseninnendruck auf die angesiegelte Membran einwirkende Schälkraft noch geringer als bei Sickenformen nach Fig.1 und Fig.2, sodass der Widerstand gegen ein Ablösen der Membran noch stärker ist.In the case of beads according to the embodiments of FIGS. 3a and 3b the peel force acting on the sealed membrane due to an internal pressure of the can is even lower than in the case of bead molds Fig.1 and Fig.2 so that the resistance to detachment of the membrane is even stronger.

Darüber hinaus erlaubt die Ausführungsform gemäss Fig. 3b mit einer schräg verlaufenden Unterseite 3b der Sicke 3 ein rückstandfreies, vollständiges Entleeren des Doseninhalts. Die Krümmung der Sicke zwischen dem - bei aufgestellter Dose - horizontal verlaufenden, geradlinigen Oberteil 3a zum schrägen Unterteil 3b kann sowohl kantig als auch abgerundet sein. Ebenso kann auch der schräge Unterteil 3b sowohl geradlinig als auch gekrümmt sein, wobei der Winkel gegenüber dem - bei aufgestellter Dose - horizontalen, geradlinigen Oberteil 3a der Sicke 3 von untergeordneter Bedeutung ist und jedenfalls jede Abweichung des Unterteils 3b von einem horizontalen Verlauf ein vollständiges Entleeren der Dose erleichtert. Die erfindungsgemässe Sicke kann beispielsweise eine lichte (axiale) Höhe von 50%, gegebenenfalls etwa 100 bis 150% ihrer radialen Tiefe aufweisen. Sie kann aber auch eine geringere lichte Höhe aufweisen, insbesondere im Fall einer - bei aufgestellter Dose - horizontal verlaufenden Oberseite 3a der Sicke 3 gemäss den Figuren 3a und 3b.In addition, the embodiment allows according to Fig. 3b with a sloping bottom 3b of the bead 3 a residue-free, complete emptying of the contents of the can. The curvature of the bead between the - when erected box - horizontally extending, rectilinear upper part 3a to the oblique lower part 3b can be both edged and rounded. Likewise, the oblique lower part 3b can be both rectilinear and curved, wherein the angle relative to the - when erected box - horizontal, straight upper part 3a of the bead 3 is of minor importance and any deviation of the lower part 3b from a horizontal course a complete emptying the can relieved. The bead according to the invention may, for example, have a clear (axial) height of 50%, optionally about 100 to 150% of its radial depth. But she can also do one Have lower clear height, in particular in the case of a - with upright box - horizontally extending top 3a of the bead 3 according to the FIGS. 3a and 3b ,

Erfindungsgemäss wird auch gewährleistet, dass der Widerstand, den die Verbindung gegen die Schälkraft auszuüben hat, erhöht wird, ohne dass zum Aufreissen eine größere Kraft aufzubringen wäre. Somit wird ein Optimum zur Lösung der beiden, einander zum Teil widersprüchlichen technischen Anforderungen geschaffen.According to the invention, it is also ensured that the resistance which the connection has to exert against the peeling force is increased without a larger force being required for tearing open. Thus, an optimum solution of the two, sometimes conflicting technical requirements is created.

Erfindungsgemäss erübrigt sich ausserdem die Ausbildung und Verwendung einer zweiten Sicke, welche ansonsten bei Dosen dieser Art erforderlich ist. Hierdurch wird die quantitative Änderung der Reduktion der Anzahl der Sicken zu einer qualitativen Massnahme: Nutzung der einzigen Sicke zur Lösung von zwei unterschiedlichen Aufgaben.According to the invention, moreover, the formation and use of a second bead, which is otherwise required in cans of this type, is unnecessary. This makes the quantitative change in the reduction of the number of beads a qualitative measure: use of the single bead to solve two different tasks.

Es ist nur verständlich, dass die erfindungsgemäßen Massnahmen nicht nur eine einfache und kostengünstige Lösung liefern, sie tragen auch zur Beseitigung von Toleranzproblemen bei und machen zudem die Anwendung von komplizierten Werkzeugen überflüssig.It is only understood that the measures according to the invention not only provide a simple and cost-effective solution, they also contribute to the elimination of tolerance problems and also make the use of complicated tools superfluous.

Claims (7)

  1. Can with can casing (1), can edge (8) and a membrane seal, if necessary additionally with a cover (7), that is provided in can casing (1) close to the can edge (8), preferably at a distance of I to 10 mm from the can edge with a revolving seam (3) that points inward with an upper side (3a) that points toward the can edge and a lower side (3b), whereby the upper side (3a) and the lower side (3b) of the seam extend equally or alternate either horizontally or at an incline toward the interior, whereby a sealing membrane (5) is connected with the upper side (3a) of seam (3) in sealing manner,
    characterized by, that the sealing membrane (5) is additionally connected in sealing manner with a straight, perpendicular part (1a) of the can casing (1) that is attached to the upper side of the seam (3).
  2. Can according to claim 1, characterized by, that the seam (3) has an almost semi-circular or triangular cross section.
  3. Can according to claim 1, characterized by, that the seam (3) is provided with - when the can is positioned vertical - a horizontally extending upper side and a lower side that extends at an incline, if necessary, curvilinear.
  4. Can according to one of claims 1 to 3, characterized by, that the incline is approximately 45°.
  5. Can according to one of claims 1 to 4, characterized by, that the sealing membrane (5) is connected in sealing manner with the seam (3) and the part (1 a) of the can casing (11) that is attached to it by means of adhesion or hot sealing.
  6. Can according to one of claims 1 to 5, characterized by, that the sealing membrane (5) is a membrane film, in particular a tear film, preferably consisting of paper or aluminum.
  7. Can according to one of claims I to 6, with a can cover (7) that overlaps the can edge (8), characterized by, that the can cover (7) engages at least partially with seam (3) with an edge bead (6).
EP04719960A 2003-03-18 2004-03-12 Can with a foil cover Expired - Lifetime EP1608564B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04719960A EP1608564B1 (en) 2003-03-18 2004-03-12 Can with a foil cover

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP03005985 2003-03-18
EP03005985 2003-03-18
PCT/EP2004/002596 WO2004083066A1 (en) 2003-03-18 2004-03-12 Can comprising a foil seal
EP04719960A EP1608564B1 (en) 2003-03-18 2004-03-12 Can with a foil cover

Publications (2)

Publication Number Publication Date
EP1608564A1 EP1608564A1 (en) 2005-12-28
EP1608564B1 true EP1608564B1 (en) 2011-01-19

Family

ID=33016828

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04719960A Expired - Lifetime EP1608564B1 (en) 2003-03-18 2004-03-12 Can with a foil cover

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Country Link
US (1) US20090014448A1 (en)
EP (1) EP1608564B1 (en)
CN (1) CN100393589C (en)
AT (1) ATE495984T1 (en)
DE (1) DE502004012126D1 (en)
NZ (1) NZ543034A (en)
WO (1) WO2004083066A1 (en)
ZA (1) ZA200508349B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AR052230A1 (en) * 2004-11-12 2007-03-07 Brasilata Embalagens Metalicas CLOSURE PROVISION FOR A CAN
DE602006011438D1 (en) * 2005-03-01 2010-02-11 Crown Packaging Technology Inc PACKAGING DOSE
EP1975076B1 (en) 2007-03-27 2009-06-24 Impress Verpackungen Erfstadt GmbH & Co. KG Tin can and a method for manufacturing the same
DE502008001929D1 (en) 2007-12-10 2011-01-13 Leonhardt Gmbh & Co Kg Geb Container with easy-to-open closure element
ES2405319T3 (en) 2008-11-10 2013-05-30 Crown Packaging Technology, Inc Closure for container and its formation procedure
WO2010102665A1 (en) * 2009-03-11 2010-09-16 Inventum Group B.V. A container
WO2012152608A1 (en) * 2011-05-06 2012-11-15 Crown Packaging Technology, Inc. Peelback

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Publication number Priority date Publication date Assignee Title
US2044677A (en) * 1935-03-29 1936-06-16 Continental Can Co Metal container
GB532834A (en) * 1939-09-21 1941-01-31 Benger S Food Ltd Improvements in cartons, canisters and the like
FR917018A (en) 1945-11-06 1946-12-23 Sarl De Ferblanterie Et De Tol Airtight closing device for metal cans with a cover
US3394861A (en) * 1967-02-23 1968-07-30 James R. Truax Multiple compartment container
CH480993A (en) * 1967-09-05 1969-11-15 Boxal Beaurepaire S A Device for closing a box
US3955006A (en) * 1971-06-30 1976-05-04 Burton H. Sokolsky Method of packaging food using a liner
CH564456A5 (en) * 1973-05-10 1975-07-31 Sandherr Max Ag Can with guaranteed closure - has closing membrane with tear-off flap glued to inner wall surface opening
CH643502A5 (en) 1980-03-25 1984-06-15 Alusuisse METAL CAN WITH MEMBRANE CLOSURE.
US4359169A (en) * 1981-08-28 1982-11-16 Container Corporation Of America Container end closure arrangement
US4401231A (en) * 1982-05-28 1983-08-30 Container Corporation Of America Container closure sealing member and method of forming
CH659633A5 (en) * 1983-05-05 1987-02-13 Hoffmann Ag Geb Ready-to-install sealing unit for a container, a method for mounting a sealing unit on a container body and a container
CH668754A5 (en) * 1985-07-10 1989-01-31 Grabher Indosa Maschbau Ag METHOD FOR CLOSING A CAN-CONTAINER BY MEANS OF A MEMBRANE.
US4940158A (en) * 1987-09-22 1990-07-10 American National Can Company Container and seam ring for container
US5913446A (en) * 1994-06-21 1999-06-22 Von Holdt, Sr.; John W. Plastic bucket and lid
DE4431758A1 (en) 1994-09-06 1996-03-14 Nestle Deutschland Ag Tin can with foil closure

Also Published As

Publication number Publication date
US20090014448A1 (en) 2009-01-15
DE502004012126D1 (en) 2011-03-03
ZA200508349B (en) 2007-03-28
WO2004083066A1 (en) 2004-09-30
CN100393589C (en) 2008-06-11
EP1608564A1 (en) 2005-12-28
CN1777546A (en) 2006-05-24
ATE495984T1 (en) 2011-02-15
NZ543034A (en) 2010-04-30

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