EP0003603A1 - Closing membrane for a container opening - Google Patents

Closing membrane for a container opening Download PDF

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Publication number
EP0003603A1
EP0003603A1 EP79100395A EP79100395A EP0003603A1 EP 0003603 A1 EP0003603 A1 EP 0003603A1 EP 79100395 A EP79100395 A EP 79100395A EP 79100395 A EP79100395 A EP 79100395A EP 0003603 A1 EP0003603 A1 EP 0003603A1
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EP
European Patent Office
Prior art keywords
membrane
recess
tear
tab
membrane according
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Granted
Application number
EP79100395A
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German (de)
French (fr)
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EP0003603B1 (en
Inventor
Franco Del Bon
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Individual
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Individual
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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
    • B65D17/501—Flexible tape or foil-like material
    • B65D17/503—Flexible tape or foil-like material applied to the internal 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
    • 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
    • B65D2517/50—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
    • B65D2517/5072—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 closure membrane for closing a can opening, which membrane has a flat part and peripherally adjoining it an edge zone which is designed to be hermetically sealed to the can.
  • a sealing membrane of this type is already known from CH-PS 593 180.
  • this known sealing membrane has the disadvantage that the flap tears in the collar part and the flat part of the membrane diagonally and irregularly and thereby tears off with a small part of the flat part of the membrane and part of the collar part, while most of the flat part of the membrane remains in its closed position. This must then be separated from the can wall with a finger or a knife or the like. Angled tearing off occurs especially when the tab is not pulled exactly radially with the finger, but slightly obliquely.
  • a closure membrane of the type described at the outset which is characterized in that a recess is provided in the flat part of the membrane, this recess being hermetically sealed by a piece of film attached to the underside of the membrane, the bent end of which by the The recess protrudes and the pull tab forms.
  • the tear-open tab provided can be produced in a simple manner and with little material expenditure.
  • the film part which carries the tear-open tab at one of its free ends is preferably guaranteed to be hermetically sealed in a simple manner by gluing or heat sealing to the underside of the flat part of the closure membrane.
  • the actual tear-open tab can be tongue-shaped and, in particular, have the shape of an isosceles triangle with an undulated tip, the continuing part of the tab forming the base of the triangle.
  • the transition of the actual tab to its extension is preferably parabolic at the point at which the part is bent.
  • the outside of the sealing membrane can be aluminum or silver-colored, while the inside can be colored, for example red, which is usually due to the coating of the film with the sealing wax.
  • the film part forming the tear-open flap can be designed in a color so that, for example, the red underside, after the free flap end has been bent, becomes red in the recess in the , for example, silver-colored, flat part of the closure membrane and thus stands out clearly .
  • the recess in the flat part of the membrane which is preferably made by punching, can have the shape of an isosceles triangle with a rounded tip, the base of the triangle preferably extending along the circumferential zone, which corresponds to the flat part of the Connects membrane, extends.
  • the preferably rounded tip of the recess points towards the center of the flat membrane section.
  • the size and shape of the cut-out can vary depending on the size and shape of the pull tab desired.
  • connection of the sealing membrane to the film part, which carries the tear-open tab at its one free end is preferably carried out by gluing or sealing, the actual tab first being bent back onto its extension, and then the edges of the extension projecting on three sides with the recess surrounding edge on the underside of the flat membrane section.
  • the remaining side is double-layered due to the bent flap, and consequently, when this side is connected to the edge of the recess in the flat part of the membrane, it is double-bonded or sealed, so that ultimately three layers of the material come together.
  • This has the great advantage that, on the one hand, the tab is optimally anchored and is thus protected from tearing off, as occurs in previously known embodiments.
  • the three interconnected layers ensure that the sealing membrane has a very high level of strength at the point at which the tensile force acting upwards on the tab acts when the membrane is torn open, and the force is thereby exerted directly the target separation area is transferred.
  • the entire area in which the tear force acts can be optimally reinforced with this embodiment of the invention.
  • the closure membrane according to the invention has the further advantage that the tear tab is easy to grasp.
  • the pull tab is clearly visible, and separate instructions for removing the membrane are completely unnecessary.
  • Aluminum or plastic film can preferably be used as the material for the closure membrane and the tear-open tab.
  • the blank of a membrane 10 shown in Fig. 1 be is made of a circular disk made of a suitable material, for example an aluminum foil, which is provided with a weakening in the form of a groove 11 arranged concentrically with the disk center point C.
  • the membrane 10 has a wall thickness of 0.03 mm, for example, while this wall thickness in the groove 11 is only about 0.02 mm.
  • the groove 11 surrounds a circular area, which forms the flat part 12 of the membrane 10 after deep drawing.
  • the flat part 12 is surrounded peripherally by an upwardly directed collar part 13 which carries at its upper end an annular flange part 14 intended for flanging.
  • a recess 15 is provided in the membrane 10 in the area which is intended to form the flat part 12, which has approximately the shape of an isosceles triangle with rounded tip 16 and which tip 16 points towards the center of the pane C.
  • the base 17 of the recess 15 advantageously runs along and somewhat distant from the groove 11.
  • the transition from the tear tab 18 to the longitudinal extension 20 takes place on the both sides 21a preferably parabolic, which results in excellent conditions for welding or gluing during application.
  • a grip hole 21 can be punched out against the tip 19 of the tear tab 18.
  • this grip hole 21 offers optical advantages in connection with the selection of differently colored materials.
  • the grip hole 21 makes the other, preferably red, color of the top of the longitudinal extension 20 visible, which provides a quick and easy recognition of the tear-open flap 18 and thus an immediate understanding of the whole opening process.
  • the edge zone of the membrane 10 forming the upward-facing collar part 13, which adjoins the groove 11 to the outside, is intended for hermetically sealed connection to the can peripheral wall 23 of a can 24, which peripheral wall is inserted into the can 24 via the plane E of the flat section 12 Membrane protrudes upwards.
  • the ring flange part 14 is flanged over the can peripheral wall 23 with the membrane 10 inserted.
  • a lid (not shown) is now placed in the depression 26 formed by deep drawing in the closure membrane serving as a guarantee seal.
  • Fig. 4 it is shown how the longitudinal extension 20 of the tear tab 18 with its edges under the circumferential Rich 27 of the recess 15 comes to rest and is hermetically sealed. Due to the fact that the tip 19 of the tear-open tab 18 is not guided completely to the edge of the recess 15, the gap 28 widens.
  • the tear-open tab 18, which comes to rest under the part 29 of the peripheral region 27, causes a triple layer of material, which that when the membrane is torn open, the tensile force acting upward on the tab 18 acts on the reinforced part 29, so that the tab 18 is reliably prevented from tearing and the desired separation area is easily broken open.
  • the tear-open tab 28 Due to the advantageous arrangement of the tear-open tab 28, it can be easily gripped with the fingers and pulled upwards.
  • the groove 11 is torn first and when pulling further upwards and outwards on the tab 18, the flat part 12 of the membrane tears easily along the groove 11 from the collar part 13 and can be removed from the can opening 25.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)

Abstract

Verschlußmembran zum Verschließen einer Dosenöffnung, welche Membran eine flache Partie und peripher daran anschließend eine Randzone aufweist, die dazu bestimmt ist, hermetisch dicht mit der Dose verbunden zu werden. Um die flache Partie sicher und vollständig entfernen zu können ist vorgesehen, daß in der flachen Partie (12) der Membran eine Aussparung (15) vorgesehen ist, wobei diese Aussparung (15) durch ein an der Unterseite der Membran angebrachtes Folienstück (18, 20) hermetisch verschlossen ist, dessen umgebogenes Ende (18) durch die Aussparung (15) herausragt und die Aufreißlasche bildet.Closure membrane for closing a can opening, the membrane having a flat part and peripheral thereafter an edge zone which is intended to be hermetically sealed to the can. In order to be able to remove the flat part safely and completely, it is provided that a recess (15) is provided in the flat part (12) of the membrane, this recess (15) being provided by a piece of film (18, 20.) Attached to the underside of the membrane ) is hermetically sealed, the bent end (18) of which protrudes through the recess (15) and forms the tear-open tab.

Description

Die Erfindung betrifft eine Verschlussmembran zum Verschliessen einer Dosenöffnung welche Membran eine flache Partie und peripher daran anschliessend eine Randzone aufweist, die dazu bestimt ist, hermetisch dicht mit der Dose verbunden zu werden.The invention relates to a closure membrane for closing a can opening, which membrane has a flat part and peripherally adjoining it an edge zone which is designed to be hermetically sealed to the can.

Eine Verschlussmembran dieser Art ist bereits aus der CH-PS 593 180 bekannt. Jedoch weist diese bekannte Verschlussmembran den Nachteil auf, dass die Lasche den Kragenteil und die flache Mambranpartie schräg und unregelmässig einreisst und hierdurch mit einem kleinen Teil der flachen Membranpartie und einem Teil des Kragenteils abreisst, während der grösste Teil der flachen Mambranpartie in seiner Verschlusstellung verbleibt. Dieser muss dann mit einem Finger oder einem Messer oder dgl. von der Dosenwandung abgetrennt werden. Ein schräges Abreissen tritt vor allem dann auf, wenn die Lasche mit dem Finger nicht exakt radial, sondern leicht schräg weggezogen wird.A sealing membrane of this type is already known from CH-PS 593 180. However, this known sealing membrane has the disadvantage that the flap tears in the collar part and the flat part of the membrane diagonally and irregularly and thereby tears off with a small part of the flat part of the membrane and part of the collar part, while most of the flat part of the membrane remains in its closed position. This must then be separated from the can wall with a finger or a knife or the like. Angled tearing off occurs especially when the tab is not pulled exactly radially with the finger, but slightly obliquely.

Diese Nachteile werden vermieden bei einer Verschlussmembran der eingangs beschriebenen Art, welche dadurch gekennzeichnet ist, dass in der flachen Partie der Membran eine Aussparung vorgesehen ist, wobei diese Aussparung durch ein an der Unterseite der Membran angebrachtes Folienstück hermetisch verschlossen ist, dessen umgebogenes Ende durch die Aussparung herausragt und die Aufreisslasche bildet.These disadvantages are avoided with a closure membrane of the type described at the outset, which is characterized in that a recess is provided in the flat part of the membrane, this recess being hermetically sealed by a piece of film attached to the underside of the membrane, the bent end of which by the The recess protrudes and the pull tab forms.

Der vorgesehene Aufreisslappen lässt sich auf einfache Weise und unter geringem Materialaufwand herstellen. Das Folienteil, das an einem seiner freien Enden die Aufreisslasche trägt, wird vorzugsweise durch Kleben oder Heissiegeln mit der Unterseite der flachen Partie der Verschlussmembran auf einfache Art garantiert hermetisch dichtend verbunden.The tear-open tab provided can be produced in a simple manner and with little material expenditure. The film part which carries the tear-open tab at one of its free ends is preferably guaranteed to be hermetically sealed in a simple manner by gluing or heat sealing to the underside of the flat part of the closure membrane.

Die eigentliche Aufreisslasche kann zungenförmig sein und dabei besonders die Form eines gleichschenkligen Dreiecks mit aberundeter Spitze besitzen, wobei der sich fortsetzende Teil der Lasche die Basis des Dreiecks bildet. Der Uebergang der eigentlichen Lasche zu ihrem Fortsatz verläuft an der Stelle, an der das Teil umgebogen wird, vorzugsweise parabelförmig.The actual tear-open tab can be tongue-shaped and, in particular, have the shape of an isosceles triangle with an undulated tip, the continuing part of the tab forming the base of the triangle. The transition of the actual tab to its extension is preferably parabolic at the point at which the part is bent.

In üblicher Weise kann die Aussenseite der Verschlussmembranaluminium- bzw..silberfarbig sein, die Innenseite hingegen farbig, z.B. rot, was meist sowieso durch die Beschichtung der Folie mit dem Siegellack bedingt ist. In gleicher Weise kann das die Aufreisslasche bildende Folienteil farblich ausgebildet sein, und zwar so, dass die z.B. rote Unterseite nach dem Umbiegen des freien Laschenendes, in der Aussparung der'z.B. silberfarbigen, flächen Partie der Verschlussmembran rot sichtbar wird und sich dadurch gut erkenntlich abhebt.In the usual way, the outside of the sealing membrane can be aluminum or silver-colored, while the inside can be colored, for example red, which is usually due to the coating of the film with the sealing wax. In the same way, the film part forming the tear-open flap can be designed in a color so that, for example, the red underside, after the free flap end has been bent, becomes red in the recess in the , for example, silver-colored, flat part of the closure membrane and thus stands out clearly .

Die Aussparung in der flachen Partie der Membran, die vorzugsweise durch Ausstanzen gefertigt wird, kann die Form eines gleichschenkligen Dreiecks mit abgerundeter Spitze besitzen, wobei die Basis des Dreiecks sich vorzugsweise entlang der Umfangszone, die sich an die flache Partie der Membran anschliesst, erstreckt. Die vorzugsweise abgerundete Spitze der Aussparung zeigt gegen das Zentrum der flachen Membranpartie. Die Grösse und Form der Aussparung kann je nach der gewünschten Grösse und Form der Aufreisslasche variieren.The recess in the flat part of the membrane, which is preferably made by punching, can have the shape of an isosceles triangle with a rounded tip, the base of the triangle preferably extending along the circumferential zone, which corresponds to the flat part of the Connects membrane, extends. The preferably rounded tip of the recess points towards the center of the flat membrane section. The size and shape of the cut-out can vary depending on the size and shape of the pull tab desired.

Die Verbindung der Verschlussmembran mit dem Folienteil, das an seinem einen freien Ende die Aufreisslasche trägt, erfolgt vorzugsweise durch Aufkleben oder Aufsiegeln, wobei zuerst die eigentliche Lasche auf ihren Fortsatz zurückgebogen wird, und dann die an drei Seiten vorstehenden Ränder des Fortsatzes mit dem die Aussparung umgebenden Rand auf der Unterseite der flachen Membranpartie verbunden werden.The connection of the sealing membrane to the film part, which carries the tear-open tab at its one free end, is preferably carried out by gluing or sealing, the actual tab first being bent back onto its extension, and then the edges of the extension projecting on three sides with the recess surrounding edge on the underside of the flat membrane section.

Die verbleibende Seite ist durch die umgebogene Lasche doppelschichtig ausgebildet, und folglich erfolgt bei der Verbindung dieser Seite mit dem Rand der Aussparung in der flachen Partie der Membran eine Doppelverklebung oder -versiegelung, sodass letztlich drei Schichten des Materials aufeinander zu liegen kommen. Dies hat den grossen Vorteil, dass einerseits die Lasche optimal verankert wird und so vor einem Abreissen, wie dies bei bereits bekannten Ausführungsformen vorkommt, geschützt ist. Durch die drei miteinander verbundenen Schichten wird erreicht, dass die Verschlussmembran an der Stelle, an der beim Aufreissen der Membran die an der Lasche nach oben wirkende Zugkraft einwirkt, eine sehr grosse Festigkeit hat und die Kraft dadurch direkt auf den Solltrennbereich übergeleitet wird. Der ganze Bereich, in dem die Aufreisskraft angreift, kann mit dieser Ausführungsform der Erfindung in optimaler Weise verstärkt werden.The remaining side is double-layered due to the bent flap, and consequently, when this side is connected to the edge of the recess in the flat part of the membrane, it is double-bonded or sealed, so that ultimately three layers of the material come together. This has the great advantage that, on the one hand, the tab is optimally anchored and is thus protected from tearing off, as occurs in previously known embodiments. The three interconnected layers ensure that the sealing membrane has a very high level of strength at the point at which the tensile force acting upwards on the tab acts when the membrane is torn open, and the force is thereby exerted directly the target separation area is transferred. The entire area in which the tear force acts can be optimally reinforced with this embodiment of the invention.

Die Verschlussmembran nach der Erfindung hat den weiteren Vorteil, dass die Aufreisslasche leicht ergreifbar ist.The closure membrane according to the invention has the further advantage that the tear tab is easy to grasp.

Durch die Wahl verschiedenfarbiger Materialien tritt die Aufreisslasche deutlich in Erscheinung, und eine separate Anleitung für das Entfernen der Membran ist völlig überflüssig.By choosing different colored materials, the pull tab is clearly visible, and separate instructions for removing the membrane are completely unnecessary.

Als Material für die Verschlussmembran und die Aufreisslasche kann vorzugsweise Aluminium- oder Kunststoff-folie verwendet werden.Aluminum or plastic film can preferably be used as the material for the closure membrane and the tear-open tab.

Im folgenden wird die Erfindung anhand von der in der Zeichnung dargestellten, bevorzugten Ausführungsform im Einzelnen beschrieben.The invention is described in detail below with reference to the preferred embodiment shown in the drawing.

In der Zeichnung zeigt:

  • Fig. 1 einen Rohling der Verschlussmembran in Draufsicht,
  • Fig. 2 eine perspektivische Ansicht der Aufreisslasche,
  • Fig. 3 einen Querschnitt einer auf dem oberen Ende der Dose angebrachten Verschlussmembran nach Fig. 1 + 2, und
  • Fig. 4 eine perspektivische Ansicht der in Fig. 3 gezeigten Anordnung von Dose und Membran nach Entfernen des · Dosendeckels.
The drawing shows:
  • 1 is a blank of the closure membrane in plan view,
  • 2 is a perspective view of the pull tab,
  • 3 shows a cross section of a closure membrane according to FIGS. 1 + 2 attached to the upper end of the can, and
  • FIG. 4 shows a perspective view of the arrangement of can and membrane shown in FIG. 3 after removal of the can lid.

Der in Fig. 1 gezeigte Rohling einer Membran 10 besteht aus einer kreisrunden Scheibe aus geeignetem Material, z.B. einer Aluminiumfolie,, welche mit einer mit dem Scheibenmittelpunkt C konzentrisch angeordneten Schwächung in Form einer Rille 11 versehen ist, Die Membrane 10 weist z.B. eine Wandstärke von 0,03 mm auf, während diese Wandstärke in der Rille 11 nur etwa 0,02 mm beträgt.The blank of a membrane 10 shown in Fig. 1 be is made of a circular disk made of a suitable material, for example an aluminum foil, which is provided with a weakening in the form of a groove 11 arranged concentrically with the disk center point C. The membrane 10 has a wall thickness of 0.03 mm, for example, while this wall thickness in the groove 11 is only about 0.02 mm.

Die Rille 11 umgibt eine Kreisfläche, welche nach dem Tiefziehen die flache Partie 12 der Membran 10 bildet. Nach dem Tiefziehen ist die flache Partie 12 von einem aufwärts gerichteten Kragenteil 13 peripher umgeben, welches an seinem oberen Ende einen zum Umbördeln bestimmten Ringflanschteil 14 trägt.The groove 11 surrounds a circular area, which forms the flat part 12 of the membrane 10 after deep drawing. After deep-drawing, the flat part 12 is surrounded peripherally by an upwardly directed collar part 13 which carries at its upper end an annular flange part 14 intended for flanging.

In der Membran 10 ist in demjenigen Bereich, welcher zur Ausbildung der flachen Partie 12 bestimmt ist, eine Aussparung 15 vorgesehen, die näherungsweise die gezeigte Form eines gleichschenkligen Dreiecks mit abgerundeter Spitze 16 aufweist, und welche Spitze 16 gegen den Scheibenmittelpunkt C zeigt. Die Basis 17 der Aussparung 15 verläuft mit Vorteil entlang und etwas distanziert von der Rille 11.A recess 15 is provided in the membrane 10 in the area which is intended to form the flat part 12, which has approximately the shape of an isosceles triangle with rounded tip 16 and which tip 16 points towards the center of the pane C. The base 17 of the recess 15 advantageously runs along and somewhat distant from the groove 11.

Die in Fig. 2 gezeigte Aufreisslasche 18, die formlich so ausgebildet sein muss, dass sie bei der Applikation auf die flache Partie 12 der Mambran frei in die Aussparung 15 zu liegen kommt, wird mit ihrer vorzugsweise abqerundeten Spitze 19) auf den Längafortsatz 20 der Aufreisslasche 18 zurückgebogen. Der Uebergang von der Aufreisslasche 18 zu deren Längsfortsatz 20 erfolgt an den beiden Seiten 21a vorzugsweise parabelförmig, was bei der Applikation vorzügliche Bedingungen für die Verschweissung oder auch die Verklebung ergibt. Gegen die Spitze 19 der Aufreisslasche 18 kann ein Griffloch 21 ausgestanzt werden. Beim Ergreifen der Lasche 18 wird dadurch einerseits ein Ausgleiten derselben aus den Fingerspitzen vermieden, und anderseits bietet dieses Griffloch 21 im Zusammenhang mit der Wahl verschiedenfarbiger Materialien optische Vorteile. Durch das Griffloch 21 wird nämlich nach Umbiegen der Lasche 18 die andere, vorzugsweise rote Farbe der Oberseite des Längsfortsatzes 20 sichtbar, was ein rasches und leichtes Erkennen der Aufreisslasche 18 und damit ein sofortiges Verstehen des ganzen Oeffnungsvorgangs vermittelt.The tear-open tab 18 shown in FIG. 2, which must be designed so that when it is applied to the flat part 12 of the membrane, it lies freely in the cutout 15, with its preferably rounded tip 19) on the longitudinal extension 20 Pull tab 18 bent back. The transition from the tear tab 18 to the longitudinal extension 20 takes place on the both sides 21a preferably parabolic, which results in excellent conditions for welding or gluing during application. A grip hole 21 can be punched out against the tip 19 of the tear tab 18. When the tab 18 is gripped, on the one hand it is prevented from sliding out of the fingertips, and on the other hand, this grip hole 21 offers optical advantages in connection with the selection of differently colored materials. After the flap 18 has been bent over, the grip hole 21 makes the other, preferably red, color of the top of the longitudinal extension 20 visible, which provides a quick and easy recognition of the tear-open flap 18 and thus an immediate understanding of the whole opening process.

Die den aufwärtsgerichteten Kragenteil 13 bildende Randzone der Membran 10, welcher an die Rille 11 nach aussen anschliesst, ist zum hermetisch dichten Verbinden mit der Dosenumfangswandung 23 einer Dose 24 bestimmt, welche Umfangswandung über die Ebene E der flachen Partie 12 einer in die Dose 24 eingesetzten Membrane nach oben herausragt.The edge zone of the membrane 10 forming the upward-facing collar part 13, which adjoins the groove 11 to the outside, is intended for hermetically sealed connection to the can peripheral wall 23 of a can 24, which peripheral wall is inserted into the can 24 via the plane E of the flat section 12 Membrane protrudes upwards.

Der Ringflanschteil 14 ist bei eingesetzter Membrane 10 über die Dosenumfangswandung 23 abgebördelt. In die durch Tiefziehen gebildete Mulde 26 in der als Garantieversiegelung dienenden Verschlussmembran wird nun in üblicher Weise ein Deckel (nicht gezeigt) gesetzt.The ring flange part 14 is flanged over the can peripheral wall 23 with the membrane 10 inserted. A lid (not shown) is now placed in the depression 26 formed by deep drawing in the closure membrane serving as a guarantee seal.

In Fig. 4 wird gezeigt, wie der Längsfortsatz 20 der Aufreisslasche 18 mit seinen Rändern unter den Umfangsbereich 27 der Aussparung 15 zu liegen kommt und mit diesem hermetisch dichtend verbunden wird. Dadurch, dass die Spitze 19 der Aufreisslasche 18 nicht ganz an den Rand der Aussparung 15 geführt wird, verbreitert sich der Spalt 28. Die Aufreisslasche 18, die unter den Teil 29 des Umfangsbereiches 27 zu liegen kommt, bewirkt eine dreifache Materialschicht, was bedingt, dass beim Aufreissen der Membran die an der Lasche 18 nach oben wirkende Zugkraft auf den verstärkten Teil 29 einwirkt, sodass ein Einreissen der Lasche 18 sicher verhindert und ein leichtes Aufbrechen des Solltrennbereiches ermöglicht wird.In Fig. 4 it is shown how the longitudinal extension 20 of the tear tab 18 with its edges under the circumferential Rich 27 of the recess 15 comes to rest and is hermetically sealed. Due to the fact that the tip 19 of the tear-open tab 18 is not guided completely to the edge of the recess 15, the gap 28 widens. The tear-open tab 18, which comes to rest under the part 29 of the peripheral region 27, causes a triple layer of material, which that when the membrane is torn open, the tensile force acting upward on the tab 18 acts on the reinforced part 29, so that the tab 18 is reliably prevented from tearing and the desired separation area is easily broken open.

Durch die vorteilhafte Anordnung der Aufreisslasche 28 kann diese leicht mit den Fingern ergriffen und nach oben gezogen werden. Hierbei wird die Rille 11 zuerst eingerissen und beim weiteren Ziehen nach oben und auswärts an der Lasche 18 reisst die flache Partie 12 der Membran mühelos entlang der Rille 11 von dem Kragenteil 13 ab und kann aus der Dosenöffnung 25 herausgenommen werden.Due to the advantageous arrangement of the tear-open tab 28, it can be easily gripped with the fingers and pulled upwards. Here, the groove 11 is torn first and when pulling further upwards and outwards on the tab 18, the flat part 12 of the membrane tears easily along the groove 11 from the collar part 13 and can be removed from the can opening 25.

Der Abriss erfolgt sauber entlang der Rille 11, ohne dass Teile der flachen Membranpartie 12 an der Wandung zurückbleiben, wie dies bei den bekannten Verschlussmembranen leicht der Fall ist.The tear-off takes place cleanly along the groove 11, without parts of the flat membrane section 12 remaining on the wall, as is easily the case with the known sealing membranes.

Claims (9)

1. Verschlussmembran zum Verschliessen einer Dosenöffnung, welche Membran eine flache Partie und peripher daran anschliessend eine Randzone aufweist, die dazu bestimmt ist, hermetisch dicht mit der Dose verbunden zu werden, dadurch gekennzeichnet, dass in der flachen Partie (12) der Membran eine Aussparung (15) vorgesehen ist, wobei diese Aussparung (15) durch ein an der Unterseite der Membran angebrachtes Folienstück (18,20), hermetisch verschlossen ist, dessen umgebogenes Ende (18) durch die Aussparung (15) herausragt und die Aufreisslasche bildet.1. closure membrane for closing a can opening, which membrane has a flat part and peripherally adjoining it an edge zone which is intended to be hermetically sealed to the can, characterized in that a recess in the flat part (12) of the membrane (15) is provided, this recess (15) being hermetically sealed by a piece of film (18, 20) attached to the underside of the membrane, the bent end (18) of which protrudes through the recess (15) and forms the tear-open tab. 2. Verschlussmembran nach Anspruch 1, dadurch gekennzeichnet, dass die Aufreisslasche (18) zungenförmig ausgebildet ist und die Form eines gleichschenkligen Dreiecks mit abgerundeter Spitze aufweist, wobei der übrige Teil (20) des Folienstückes (18,20) an die Basis des Dreiecks anschliesst.2. Sealing membrane according to claim 1, characterized in that the tear-open tab (18) is tongue-shaped and has the shape of an isosceles triangle with a rounded tip, the remaining part (20) of the film piece (18, 20) adjoining the base of the triangle . 3. Verschlussmembran nach Anspruch 2, dadurch gekennzeichnet, dass die Längskanten des Folienstückes (18,20) beim Uebergang zur Aufreisslasche (18) parabelförmig verlaufen.3. Closure membrane according to claim 2, characterized in that the longitudinal edges of the film piece (18, 20) run parabolically at the transition to the tear-open tab (18). 4. Verschlussmembran nach Anspruch 1, dadurch gekennzeichnet, dass im Bereich des freien Endes der Aufreisslasche (18) ein Griffloch (21) vorgesehen ist.4. Closure membrane according to claim 1, characterized in that a grip hole (21) is provided in the region of the free end of the tear tab (18). 5. Verschlussmembran nach Anspruch 1, dadurch gekennzeichnet, dass die Aussparung (15) in der flachen Partie der Membran angenähert die Form eines gleichschenkligen Dreiecks mit abgerundeter Spitze besitzt.5. Closure membrane according to claim 1, characterized in that the recess (15) in the flat part of the membrane approximately has the shape of an isosceles triangle with a rounded tip. 6. Verschlussmembran nach Anspruch 5, dadurch gekennzeichnet, dass der Basis des Dreiecks entsprechende Seite der Aussparung (15) sich entlang der Randzone (13) erstreckt.6. Closure membrane according to claim 5, characterized in that the base of the triangle corresponding side of the recess (15) extends along the edge zone (13). 7. Verschlussmembran nach Anspruch 6, dadurch gekennzeichnet, dass die abgerundete Spitze der Aussparung (15) gegen das Zentrum (c) der flachen Membranpartie zeigt.7. Closure membrane according to claim 6, characterized in that the rounded tip of the recess (15) against the center (c) of the flat membrane section shows. 8. Verschlussmembran nach Anspruch 3, dadurch gekennzeichnet, dass das Folienstück (18,20) im Bereich seiner Falzstelle mit der flachen Mambranpartie (12) ein dreifache Materialschicht bildet.8. Closure membrane according to claim 3, characterized in that the film piece (18, 20) forms a triple layer of material in the region of its fold point with the flat membrane section (12). 9. Verschlussmembran nach Anspruch 3, dadurch gekenzeichnet, dass indem die Spitze (19) der Aufreisslasche (18) nicht ganz an den Rand der Aussparung (16) geführt ist, damit sich ein Spalt (28) bildet.9. Sealing membrane according to claim 3, characterized in that the tip (19) of the tear tab (18) is not completely guided to the edge of the recess (16), so that a gap (28) is formed.
EP79100395A 1978-02-15 1979-02-12 Closing membrane for a container opening Expired EP0003603B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1645/78 1978-02-15
CH164578A CH623534A5 (en) 1978-02-15 1978-02-15

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EP0003603A1 true EP0003603A1 (en) 1979-08-22
EP0003603B1 EP0003603B1 (en) 1983-04-27

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EP79100395A Expired EP0003603B1 (en) 1978-02-15 1979-02-12 Closing membrane for a container opening

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US (1) US4195748A (en)
EP (1) EP0003603B1 (en)
CH (1) CH623534A5 (en)
DE (1) DE2965261D1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4557398A (en) * 1984-08-17 1985-12-10 International Paper Company End closure structure for a container
CN102574608A (en) * 2010-03-18 2012-07-11 印普瑞思集团有限公司 Closure for an easy opening container and a container provided with such closure

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4884751A (en) * 1988-04-13 1989-12-05 Lil' Duke Sprinkler, Inc. Lawn sprinkler

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR767573A (en) * 1934-07-19
DE1607896A1 (en) * 1967-09-19 1971-10-21 Nat Can Corp Beaker
US3908857A (en) * 1974-10-15 1975-09-30 Continental Can Co Tape seal for container

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3990603A (en) * 1975-12-09 1976-11-09 Minnesota Mining And Manufacturing Company Easy open closure system
CH598063A5 (en) * 1976-05-07 1978-04-28 Sandherr Max Ag
US4108330A (en) * 1977-06-08 1978-08-22 Minnesota Mining And Manufacturing Company Easy open container end assembly

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR767573A (en) * 1934-07-19
DE1607896A1 (en) * 1967-09-19 1971-10-21 Nat Can Corp Beaker
US3908857A (en) * 1974-10-15 1975-09-30 Continental Can Co Tape seal for container

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4557398A (en) * 1984-08-17 1985-12-10 International Paper Company End closure structure for a container
CN102574608A (en) * 2010-03-18 2012-07-11 印普瑞思集团有限公司 Closure for an easy opening container and a container provided with such closure
CN102574608B (en) * 2010-03-18 2015-11-25 印普瑞思集团有限公司 For easily opening the closure member of container and being provided with the container of this closure member

Also Published As

Publication number Publication date
DE2965261D1 (en) 1983-06-01
US4195748A (en) 1980-04-01
CH623534A5 (en) 1981-06-15
EP0003603B1 (en) 1983-04-27

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