EP3250463B1 - Can closure, in particular for a milk can - Google Patents

Can closure, in particular for a milk can Download PDF

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Publication number
EP3250463B1
EP3250463B1 EP15780764.5A EP15780764A EP3250463B1 EP 3250463 B1 EP3250463 B1 EP 3250463B1 EP 15780764 A EP15780764 A EP 15780764A EP 3250463 B1 EP3250463 B1 EP 3250463B1
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EP
European Patent Office
Prior art keywords
closure
closure part
pressure bulkhead
pressure
tamper
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.)
Active
Application number
EP15780764.5A
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German (de)
French (fr)
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EP3250463A1 (en
Inventor
Rolf Zöller
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.)
Euro-Cap GmbH
Euro Cap GmbH
Original Assignee
Euro-Cap GmbH
Euro Cap GmbH
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Publication of EP3250463A1 publication Critical patent/EP3250463A1/en
Application granted granted Critical
Publication of EP3250463B1 publication Critical patent/EP3250463B1/en
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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
    • B65D51/00—Closures not otherwise provided for
    • B65D51/18—Arrangements of closures with protective outer cap-like covers or of two or more co-operating closures
    • B65D51/20—Caps, lids, or covers co-operating with an inner closure arranged to be opened by piercing, cutting, or tearing
    • 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
    • B65D2251/00—Details relating to container closures
    • B65D2251/0003—Two or more closures
    • B65D2251/0006—Upper closure
    • B65D2251/0009—Upper closure of the 17-type
    • 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
    • B65D2251/00—Details relating to container closures
    • B65D2251/0003—Two or more closures
    • B65D2251/0068—Lower closure
    • B65D2251/0071—Lower closure of the 17-type

Definitions

  • the invention relates to a can closure, in particular for a milk can.
  • the invention further relates to a can lid with such a can closure and a can with such a can closure or a corresponding can lid.
  • Such a can closure is known, which can be inserted into an opening in a metal can lid of a beverage can (e.g. milk can).
  • This known can closure has an outer closure part and an inner closure part which, in the assembled state, are both inserted into an opening in the can lid and connected to one another, for example by a welded connection or an adhesive connection.
  • the outer closure part consists of a lower closure part and an upper closure part, the lower closure part being connected to the inner closure part, for example by a welded connection or an adhesive connection, as already mentioned above.
  • the upper closure part is connected to the lower closure part by a film hinge and can be pivoted from a delivery position into a use position.
  • the upper closure part In the delivery position, the upper closure part is pivoted away from the lower closure part and then lies flat on the can lid.
  • the upper part of the closure In the use position, however, the upper part of the closure is on the lower part pivoted and then rests on the lower closure part, a pouring opening extending through the inner closure part and through the lower closure part and the upper closure part.
  • a closure cover is also pivotably attached to the upper closure part by means of a further film hinge in order to be able to open and close the pouring opening.
  • the WO 2008/054 636 A2 shows a can closure with a massive closure part that forms a kind of pressure bulkhead. However, no tamper-evident element which can be broken open and closes the pouring opening is described there.
  • the invention is therefore based on the object of improving the known can closure described above accordingly.
  • the can closure according to the invention initially has, in accordance with the known can closure described at the beginning, a pouring opening through which liquid can be poured out of the can.
  • the can closure according to the invention in accordance with the known can closure described above, has a tamper-evident element which closes the pouring opening in the original state and can be broken open for pouring in order to release the pouring opening.
  • the consumer can therefore use the state of the tamper-evident element to recognize whether the can is in the closed original state or whether the can has already been opened in the meantime.
  • the can closure according to the invention is now characterized by an additional pressure bulkhead, which closes the pouring opening on the inside of the tamper-evident element and thereby keeps the pressure inside the can away from the tamper-evident element, whereby the pressure bulkhead can be broken open for pouring in order to release the pouring opening.
  • the pouring opening is closed by two separate components, namely on the one hand by the tamper-evident element known per se and on the other hand through the pressure bulkhead.
  • the pressure bulkhead only has the task of keeping the pressure inside the can away from the tamper-evident element so that the tamper-evident element is not broken out in the event of a high internal can pressure.
  • the pressure bulkhead therefore preferably has a significantly greater compressive strength with respect to the internal pressure of the can than the tamper-evident element.
  • the pressure bulkhead can have a pressure resistance of up to 2 bar, 3 bar, 4 bar, 5 bar, 6 bar or even 7 bar compared to the internal pressure in the can.
  • the pressure bulkhead is essentially disk-shaped and is inserted into the pouring opening in its original state, for example in the inner closure part or in the lower closure part of the outer closure part, if the can closure according to the invention is constructed in this way.
  • the pressure bulkhead preferably has a sealing lip running around the circumferential edge of the sealing bulkhead, which protrudes outwards (ie upwards) from the pressure bulkhead towards the outside of the can and is sealingly applied to a circumferential sealing surface on the inner wall of the pouring opening.
  • the sealing lip of the pressure bulkhead therefore leads to a good sealing effect.
  • the pressure bulkhead is preferably designed such that the sealing effect between the sealing lip of the pressure bulkhead on the one hand and the sealing surface of the can closure on the other hand improves with increasing can internal pressure.
  • This can be achieved, for example, in that the disc-shaped can closure bulges outwards when subjected to pressure from the internal pressure of the can, this bulging causing the protruding sealing lip to be pressed axially and radially outward against the circumferential sealing surface with its free end.
  • the contact pressure of the sealing lip on the sealing surface increases with the internal pressure of the can, so that the sealing effect improves with increasing internal pressure of the can.
  • the pressure scrap has a stiffening rib which is preferably attached to the outside of the pressure bulkhead and runs around it in a ring.
  • a projection can be located on the underside of the pivotable upper part of the closure in order to break out the tamper-evident element when the can closure is folded up.
  • this projection presses on the tamper-evident element and breaks it out of the pouring opening.
  • This projection is preferably adapted in its shape and position to the stiffening rib in the pressure bulkhead. In the folded state, the stiffening rib in the pressure bulkhead, on the one hand, and the projection on the underside of the upper part of the closure are therefore preferably in congruence on top of one another.
  • the upper closure part therefore preferably has at least one on its underside Projection which protrudes downwards and facilitates the breaking out of the tamper-evident element and the sealing element, this projection preferably likewise being essentially ring-shaped, but can also have any other geometric shape.
  • the can closure according to the invention is constructed similarly to the known can closure according to FIG DE 10 2013 003 154 B3 .
  • the can closure according to the invention thus has an inner closure part and an outer closure part, the outer closure part comprising a lower closure part and an upper closure part which can be pivoted to it.
  • a can lid is preferably attached to the upper closure part in order to be able to close the pouring opening so that the can can be closed again.
  • a pouring spout can be attached to the outer closure part.
  • the individual components e.g. outer closure part, inner closure part, upper closure part, lower closure part, closure cover, film hinges, etc.
  • the individual components are preferably made of plastic.
  • the problem with such a can closure is the fact that plastic is not absolutely gas-tight.
  • at least small amounts of oxygen can therefore enter the inside of the can through the can closure and oxidize the contents of the can, which reduces the shelf life. It is therefore desirable to minimize the disruptive ingress of oxygen through the can closure as much as possible.
  • the can closure therefore has in addition to the tamper-evident element and the pressure bulkhead an additional gas barrier, which is preferably much more gas-tight than the tamper-evident element and / or the pressure bulkhead. The additional gas barrier minimizes the ingress of oxygen through the can closure and thereby extends the shelf life of the closed can.
  • the gas barrier can consist of a gas-tight film, but other designs are also possible within the scope of the invention.
  • the gas barrier in the can closure according to the invention.
  • the gas barrier can be attached between the tamper-evident element and the pressure bulkhead, for example on the outside of the pressure bulkhead.
  • the gas barrier is attached to the inside of the pressure bulkhead.
  • the pressure bulkhead can be mounted in the can closure by means of a latching connection, preferably in the closure lower part of the closure outer part.
  • the outer closure part is connected to the inner closure part, for example by a welded connection or by an adhesive connection.
  • the invention not only claims protection for the above-described can closure according to the invention. Rather, the invention also claims protection for a can lid in which such a can closure according to the invention is already preassembled. Finally, the invention also claims protection for a can (e.g. Milk can, beverage can) with such a can lid with a preassembled can closure or with a can closure according to the invention.
  • a can e.g. Milk can, beverage can
  • FIG. 1 show a preferred embodiment of a can closure 1 according to the invention for a metal can, the can closure 1 according to the invention being particularly suitable for a can which is pasteurized or sterilized in the filled state before delivery.
  • the can is partially heated to over + 120 ° C, which leads to a correspondingly high internal can pressure which, with conventional can closures, can lead to an unwanted breakout of a tamper-evident element.
  • the can closure 1 is turned into a. Opening used in a metal can lid 2 of the beverage can.
  • the can closure 1 consists essentially of an inner closure part 3 and an outer closure part 4, both of which are made of plastic and are connected to one another in the assembled state by an adhesive connection or a welded connection.
  • the inner closure part 3 is located inside the can in the mounted state, while the outer closure part 4 is located outside the beverage can in the mounted state and rests on the can lid 2.
  • the outer closure part 4 in turn consists of a lower closure part 5 and an upper closure part 6, the The upper closure part 6 is attached pivotably to the lower closure part 5 by a film hinge 7.
  • the upper closure part 6 can therefore consist of an in Figure 1 Shown delivery position relative to the closure lower part 5 in a Figure 3 The position of use shown can be pivoted. In the delivery position according to Figure 1 the upper closure part 6 rests flat on the can lid 2. In the position of use according to Figure 3 however, if the upper part 6 of the closure is folded onto the lower part 5.
  • closure cover 8 which is attached to the upper closure part 6 in a pivotable manner by means of a film hinge 9.
  • the closure cover 8 can therefore consist of an in Figure 3 closed position shown in Figure 4 shown removal position are pivoted.
  • a pouring spout 11 is attached to the upper closure part 6 as a metering aid.
  • the pouring opening 10 is closed in the unopened original state by a tamper-evident element 12, the tamper-evident element being broken out of the pouring opening 10 when the upper closure part 6 is placed on the lower closure part 5 in the position of use according to FIG Figure 3 is folded.
  • the pouring opening 10 is closed in the original state by a pressure bulkhead 14, which has the task of keeping the pressure inside the can away from the tamper-evident element 12.
  • a pressure bulkhead 14 which has the task of keeping the pressure inside the can away from the tamper-evident element 12.
  • the pressure bulkhead 14 is constructed essentially in the form of a disk and has a sealing lip 15 on its peripheral edge which protrudes from the bottom 16 to the outside of the can, ie up how out Figure 7 can be seen.
  • the bottom 16 of the pressure bulkhead 14 is bulged towards the outside of the can, ie upwards.
  • This bulging of the bottom 16 of the pressure bulkhead 14 in turn leads to the sealing lip 15 on the pressure bulkhead 14 being bent radially outward with its free end in the direction of the arrow.
  • the contact pressure of the sealing lip 15 of the pressure bulkhead 14 on the associated sealing surface in the can closure 1 increases.
  • the sealing effect of the pressure bulkhead 14 thus increases with increasing can internal pressure p.
  • the pressure bulkhead 14 has an annular circumferential stiffening rib 17, depending on the design variant, the stiffening rib 17 in the position of use being able to lie under the likewise annular projection 13 on the underside of the upper part 6 of the closure.
  • FIG 8 shows that the pressure bulkhead 14 is mounted in the unopened delivery state of the can by a latching connection in the closure lower part 5.
  • the annular circumferential sealing lip 15 has at its free end a latching projection 18 which engages in a likewise annular circumferential latching receptacle 19 in the closure lower part 5.
  • the latching projection 18 and the latching receptacle 19 together form the latching connection which fixes the pressure bulkhead 14 in the closure lower part 5.
  • the latching projection 18 and the latching receptacle 19 also form a seal which seals the pouring opening 10.
  • the above-mentioned bulging of the bottom 16 of the pressure bulkhead 14 due to the can internal pressure p then leads the locking projection 18 and the locking receptacle 19, whereby a good sealing effect is achieved, which becomes even better with increasing can internal pressure p.
  • FIG. 8 It also shows Figure 8 that an additional gas barrier 20 is attached to the underside of the pressure bulkhead 14, which in this embodiment consists of a gas-tight film.
  • the gas barrier 20 reduces the ingress of oxygen into the can during storage of the can, thereby improving durability.
  • Figure 9 shows a modification of Figure 8 so as to avoid repetition refer to the description above Figure 8 is referred to, the same reference numerals being used for corresponding details.
  • a special feature of this embodiment is that the gas barrier 20 is not - as in Figure 8 - Is arranged on the underside of the pressure bulkhead 14, but on the top of the pressure bulkhead 14.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)

Description

Die Erfindung betrifft einen Dosenverschluss, insbesondere für eine Milchdose. Weiterhin betrifft die Erfindung einen Dosendeckel mit einem solchen Dosenverschluss und eine Dose mit einem solchen Dosenverschluss bzw. einem entsprechenden Dosendeckel.The invention relates to a can closure, in particular for a milk can. The invention further relates to a can lid with such a can closure and a can with such a can closure or a corresponding can lid.

Aus DE 10 2013 003 154 B3 ist ein derartiger Dosenverschluss bekannt, der in eine Öffnung in einem aus Metall bestehenden Dosendeckel einer Getränkedose (z. B. Milchdose) eingesetzt werden kann. Dieser bekannte Dosenverschluss weist ein Verschlussaußenteil und ein Verschlussinnenteil auf, die beide im montierten Zustand in eine Öffnung in dem Dosendeckel eingesetzt sind und miteinander verbunden werden, beispielsweise durch eine Schweißverbindung oder eine Klebeverbindung.Out DE 10 2013 003 154 B3 such a can closure is known, which can be inserted into an opening in a metal can lid of a beverage can (e.g. milk can). This known can closure has an outer closure part and an inner closure part which, in the assembled state, are both inserted into an opening in the can lid and connected to one another, for example by a welded connection or an adhesive connection.

Das Verschlussaußenteil besteht hierbei aus einem Verschlussunterteil und einem Verschlussoberteil, wobei das Verschlussunterteil mit dem Verschlussinnenteil verbunden ist, beispielsweise durch eine Schweißverbindung oder eine Klebeverbindung, wie bereits vorstehend erwähnt wurde.The outer closure part consists of a lower closure part and an upper closure part, the lower closure part being connected to the inner closure part, for example by a welded connection or an adhesive connection, as already mentioned above.

Das Verschlussoberteil ist dagegen durch ein Filmscharnier mit dem Verschlussunterteil verbunden und kann von einer Auslieferungsstellung in eine Gebrauchsstellung geschwenkt werden. In der Auslieferungsstellung ist das Verschlussoberteil von dem Verschlussunterteil weg geschwenkt und liegt dann flach auf dem Dosendeckel auf. In der Gebrauchsstellung ist das Verschlussoberteil dagegen auf das Verschlussunterteil geschwenkt und liegt dann auf dem Verschlussunterteil auf, wobei sich eine Ausgießöffnung durch das Verschlussinnenteil sowie durch das Verschlussunterteil und das Verschlussoberteil erstreckt.The upper closure part, on the other hand, is connected to the lower closure part by a film hinge and can be pivoted from a delivery position into a use position. In the delivery position, the upper closure part is pivoted away from the lower closure part and then lies flat on the can lid. In the use position, however, the upper part of the closure is on the lower part pivoted and then rests on the lower closure part, a pouring opening extending through the inner closure part and through the lower closure part and the upper closure part.

An dem Verschlussoberteil ist ferner mittels eines weiteren Filmscharniers ein Verschlussdeckel schwenkbar angebracht, um die Ausgießöffnung öffnen bzw. schließen zu können.A closure cover is also pivotably attached to the upper closure part by means of a further film hinge in order to be able to open and close the pouring opening.

Schließlich befindet sich in dem bekannten Dosenverschluss ein Originalitätssicherungselement, wobei der Verbraucher anhand des Zustands des Originalitätssicherungselements erkennen kann, ob die Dose noch im Originalzustand ist oder bereits geöffnet wurde. Dieses Originalitätssicherungselement wird aus der Ausgießöffnung herausgebrochen, wenn das Verschlussoberteil auf das Verschlussunterteil geschwenkt wird. Dabei drückt nämlich ein Vorsprung an der Unterseite des Verschlussoberteils auf das Originalitätssicherungselement und bricht dieses aus der Ausgießöffnung heraus.Finally, there is a tamper-evident element in the known can closure, with the consumer being able to recognize from the state of the tamper-evident element whether the can is still in its original state or has already been opened. This tamper-evident element is broken out of the pouring opening when the upper closure part is pivoted onto the lower closure part. This is because a projection on the underside of the upper part of the closure presses on the tamper-evident element and breaks it out of the pouring opening.

Problematisch an diesem bekannten Dosenverschluss ist der Einsatz z. B. bei einer Dose, die nach der Befüllung einer Pasteurisierung oder Sterilisierung unterzogen wird, wobei der Doseninhalt erhitzt wird, was zu einem entsprechenden Druckanstieg in der Dose führt. Der dabei entstehende Doseninnendruck kann in der Praxis zu einem ungewollten Herausbrechen des Originalitätssicherungselements führen, da das Originalitätssicherungselement dem dabei entstehenden Doseninnendruck nicht standhält.The problem with this known can closure is the use, for. B. in a can which is subjected to pasteurization or sterilization after filling, the contents of the can being heated, which leads to a corresponding increase in pressure in the can. In practice, the pressure inside the can that arises can lead to the tamper-evident element breaking out unintentionally, since the tamper-evident element cannot withstand the pressure inside the can.

Die WO 2008/054 636 A2 zeigt einen Dosenverschluss mit einem massiven Verschließteil, das eine Art Druckschott bildet. Allerdings wird dort kein aufbrechbares, die Ausgießöffnung verschließendes Originalitätssicherungselement beschrieben.The WO 2008/054 636 A2 shows a can closure with a massive closure part that forms a kind of pressure bulkhead. However, no tamper-evident element which can be broken open and closes the pouring opening is described there.

Zum technischen Hintergrund der Erfindung wird auch hingewiesen auf US 2012/103987 A1 , US 2008/110887 A1 und US 2002/014502 A1 . Diese Druckschriften betreffen jedoch grundsätzlich anders aufgebaute Dosenverschlüsse oder offenbaren kein DruckschottReference is also made to the technical background of the invention US 2012/103987 A1 , US 2008/110887 A1 and US 2002/014502 A1 . These documents, however, basically relate to can closures with a different structure or do not disclose a pressure bulkhead

Dokument US2012/103987A1 offenbart ein Dosenverschluss nach dem Oberbegriff des Anspruchs 1.document US2012 / 103987A1 discloses a can closure according to the preamble of claim 1.

Der Erfindung liegt deshalb die Aufgabe zugrunde, den vorstehend beschriebenen bekannten Dosenverschluss entsprechend zu verbessern.The invention is therefore based on the object of improving the known can closure described above accordingly.

Diese Aufgabe wird durch einen erfindungsgemäßen Dosenverschluss gemäß Anspruch 1, durch einen entsprechenden Dosendeckel gemäß Patentanspruch 14 bzw. durch eine entsprechende Dose gemäß Patentanspruch 15 gelöst.This object is achieved by a can closure according to the invention according to claim 1, by a corresponding can lid according to claim 14 or by a corresponding can according to claim 15.

Der erfindungsgemäße Dosenverschluss weist zunächst in Übereinstimmung mit dem eingangs beschriebenen bekannten Dosenverschluss eine Ausgießöffnung auf, durch die Flüssigkeit aus der Dose ausgegossen werden kann.The can closure according to the invention initially has, in accordance with the known can closure described at the beginning, a pouring opening through which liquid can be poured out of the can.

Darüber hinaus weist der erfindungsgemäße Dosenverschluss in Übereinstimmung mit dem eingangs beschriebenen bekannten Dosenverschluss ein Originalitätssicherungselement auf, das die Ausgießöffnung im Originalzustand verschließt und zum Ausgießen aufgebrochen werden kann, um die Ausgießöffnung freizugeben. Der Verbraucher kann also anhand des Zustandes des Originalitätssicherungselementes erkennen, ob sich die Dose im verschlossen Originalzustand befindet oder ob die Dose zwischenzeitlich bereits geöffnet wurde.In addition, the can closure according to the invention, in accordance with the known can closure described above, has a tamper-evident element which closes the pouring opening in the original state and can be broken open for pouring in order to release the pouring opening. The consumer can therefore use the state of the tamper-evident element to recognize whether the can is in the closed original state or whether the can has already been opened in the meantime.

Der erfindungsgemäße Dosenverschluss zeichnet sich nun durch ein zusätzliches Druckschott aus, das die Ausgießöffnung an der Innenseite des Originalitätssicherungselements verschließt und den Doseninnendruck dadurch von dem Originalitätssicherungselement fernhält, wobei das Druckschott zum Ausgießen aufgebrochen werden kann, um die Ausgießöffnung frei zu geben. Bei dem erfindungsgemäßen Dosenverschluss wird die Ausgießöffnung also durch zwei getrennte Bauteile verschlossen, nämlich zum einen durch das an sich bekannte Originalitätssicherungselement und zum anderen durch das Druckschott. Das Druckschott hat hierbei lediglich die Aufgabe, den Doseninnendruck von dem Originalitätssicherungselement fernzuhalten, damit das Originalitätssicherungselement bei einem hohen Doseninnendruck nicht herausgebrochen wird. Dies ist insbesondere dann sinnvoll, wenn die Dose nach dem Befüllen und dem Montieren des erfindungsgemäßen Dosenverschlusses einer Pasteurisierung oder Sterilisierung unterzogen wird, da die dabei auftretenden hohen Temperaturen zu einem entsprechend hohen Doseninnendruck führen, wobei das Originalitätssicherungselement durch den hohen Doseninnendruck herausgebrochen werden könnte.The can closure according to the invention is now characterized by an additional pressure bulkhead, which closes the pouring opening on the inside of the tamper-evident element and thereby keeps the pressure inside the can away from the tamper-evident element, whereby the pressure bulkhead can be broken open for pouring in order to release the pouring opening. In the case of the can closure according to the invention, the pouring opening is closed by two separate components, namely on the one hand by the tamper-evident element known per se and on the other hand through the pressure bulkhead. The pressure bulkhead only has the task of keeping the pressure inside the can away from the tamper-evident element so that the tamper-evident element is not broken out in the event of a high internal can pressure. This is particularly useful if the can is pasteurized or sterilized after the can closure according to the invention has been filled and installed, since the high temperatures that occur lead to a correspondingly high internal pressure in the can, whereby the tamper-evident element could be broken out by the high internal pressure in the can.

Das Druckschott weist deshalb vorzugsweise eine wesentlich größere Druckfestigkeit gegenüber dem Doseninnendruck auf als das Originalitätssicherungselement. Beispielsweise kann das Druckschott konstruktionsbedingt gegenüber dem Doseninnendruck eine Druckfestigkeit von bis zu 2 bar, 3 bar, 4 bar, 5 bar, 6 bar oder sogar 7 bar aufweisen.The pressure bulkhead therefore preferably has a significantly greater compressive strength with respect to the internal pressure of the can than the tamper-evident element. For example, due to the design, the pressure bulkhead can have a pressure resistance of up to 2 bar, 3 bar, 4 bar, 5 bar, 6 bar or even 7 bar compared to the internal pressure in the can.

In einem bevorzugten Ausführungsbeispiel der Erfindung ist das Druckschott im Wesentlichen scheibenförmig und ist im Originalzustand in die Ausgießöffnung eingesetzt und zwar beispielsweise in das Verschlussinnenteil oder in das Verschlussunterteil des Verschlussaußenteils, falls der erfindungsgemäße Dosenverschluss in dieser Weise aufgebaut ist.In a preferred embodiment of the invention, the pressure bulkhead is essentially disk-shaped and is inserted into the pouring opening in its original state, for example in the inner closure part or in the lower closure part of the outer closure part, if the can closure according to the invention is constructed in this way.

Darüber hinaus weist das Druckschott vorzugsweise eine am Umfangsrand des Dichtschotts ringförmig umlaufende Dichtlippe auf, die von dem Druckschott zum Dosenäußeren hin nach außen (d. h. nach oben) absteht und sich an eine umlaufende Dichtfläche an der Innenwand der Ausgießöffnung dichtend anlegt. Die Dichtlippe des Druckschotts führt also zu einer guten Dichtwirkung.In addition, the pressure bulkhead preferably has a sealing lip running around the circumferential edge of the sealing bulkhead, which protrudes outwards (ie upwards) from the pressure bulkhead towards the outside of the can and is sealingly applied to a circumferential sealing surface on the inner wall of the pouring opening. The sealing lip of the pressure bulkhead therefore leads to a good sealing effect.

Vorzugsweise ist das Druckschott so ausgelegt, dass die Dichtwirkung zwischen der Dichtlippe des Druckschotts einerseits und der Dichtfläche des Dosenverschlusses andererseits mit zunehmenden Doseninnendruck besser wird. Dies kann beispielsweise dadurch erreicht werden, dass sich der scheibenförmige Dosenverschluss bei einer Druckbelastung durch den Doseninnendruck nach außen auswölbt, wobei diese Auswölbung dazu führt, dass die abstehende Dichtlippe mit ihrem freien Ende axial und radial nach außen gegen die umlaufende Dichtfläche gedrückt wird. Der Anpressdruck der Dichtlippe auf die Dichtfläche nimmt hierbei also mit dem Doseninnendruck zu, so dass sich die Dichtwirkung mit zunehmendem Doseninnendruck verbessert.The pressure bulkhead is preferably designed such that the sealing effect between the sealing lip of the pressure bulkhead on the one hand and the sealing surface of the can closure on the other hand improves with increasing can internal pressure. This can be achieved, for example, in that the disc-shaped can closure bulges outwards when subjected to pressure from the internal pressure of the can, this bulging causing the protruding sealing lip to be pressed axially and radially outward against the circumferential sealing surface with its free end. The contact pressure of the sealing lip on the sealing surface increases with the internal pressure of the can, so that the sealing effect improves with increasing internal pressure of the can.

In dem bevorzugten Ausführungsbeispiel der Erfindung weist das Druckschrott eine Versteifungsrippe auf, die vorzugsweise an der Außenseite des Druckschotts angebracht ist und ringförmig umläuft.In the preferred embodiment of the invention, the pressure scrap has a stiffening rib which is preferably attached to the outside of the pressure bulkhead and runs around it in a ring.

Es wurde bereits eingangs zu dem bekannten Dosenverschluss erwähnt, dass sich an der Unterseite des schwenkbaren Verschlussoberteils ein Vorsprung befinden kann, um das Originalitätssicherungselement beim Zusammenklappen des Dosenverschlusses herauszubrechen. Beim Schwenken des Verschlussoberteils auf das Verschlussunterteil drückt dieser Vorsprung also auf das Originalitätssicherungselement und bricht dieses aus der Ausgießöffnung heraus. Vorzugsweise ist dieser Vorsprung in seiner Form und Lage an die Versteifungsrippe in dem Druckschott angepasst. Im zusammengeklappten Zustand liegen die Versteifungsrippe im dem Druckschott einerseits und der Vorsprung an der Unterseite des Verschlussoberteils also vorzugsweise in Deckung übereinander. Das Verschlussoberteil weist also vorzugsweise an seiner Unterseite mindestens einen Vorsprung auf, der nach unten hervorsteht und das Herausbrechen des Originalitätssicherungselementes und des Dichtelementes erleichtert, wobei dieser Vorsprung vorzugsweise ebenfalls im Wesentlichen ringförmig ist, jedoch auch jede andere geometrische Form haben kann.It was already mentioned at the beginning of the known can closure that a projection can be located on the underside of the pivotable upper part of the closure in order to break out the tamper-evident element when the can closure is folded up. When the upper part of the closure is pivoted onto the lower part of the closure, this projection presses on the tamper-evident element and breaks it out of the pouring opening. This projection is preferably adapted in its shape and position to the stiffening rib in the pressure bulkhead. In the folded state, the stiffening rib in the pressure bulkhead, on the one hand, and the projection on the underside of the upper part of the closure are therefore preferably in congruence on top of one another. The upper closure part therefore preferably has at least one on its underside Projection which protrudes downwards and facilitates the breaking out of the tamper-evident element and the sealing element, this projection preferably likewise being essentially ring-shaped, but can also have any other geometric shape.

Ansonsten ist der erfindungsgemäße Dosenverschluss ähnlich aufgebaut wie der eingangs beschriebene bekannte Dosenverschluss gemäß DE 10 2013 003 154 B3 . Der erfindungsgemäße Dosenverschluss weist also ein Verschlussinnenteil und ein Verschlussaußenteil auf, wobei das Verschlussaußenteil ein Verschlussunterteil und ein dazu schwenkbares Verschlussoberteil umfasst. Hierbei ist an dem Verschlussoberteil vorzugsweise ein Dosendeckel angebracht, um die Ausgießöffnung verschließen zu können, so dass die Dose wieder verschließbar ist. Darüber hinaus kann an dem Verschlussaußenteil eine Ausgießtülle angebracht sein.Otherwise, the can closure according to the invention is constructed similarly to the known can closure according to FIG DE 10 2013 003 154 B3 . The can closure according to the invention thus has an inner closure part and an outer closure part, the outer closure part comprising a lower closure part and an upper closure part which can be pivoted to it. Here, a can lid is preferably attached to the upper closure part in order to be able to close the pouring opening so that the can can be closed again. In addition, a pouring spout can be attached to the outer closure part.

Ferner ist zu erwähnen, dass die einzelnen Bauteile (z. B. Verschlussaußenteil, Verschlussinnenteil, Verschlussoberteil, Verschlussunterteil, Verschlussdeckel, Filmscharniere, etc.) vorzugsweise aus Kunststoff bestehen.It should also be mentioned that the individual components (e.g. outer closure part, inner closure part, upper closure part, lower closure part, closure cover, film hinges, etc.) are preferably made of plastic.

Problematisch bei einem solchen Dosenverschluss ist die Tatsache, dass Kunststoff nicht absolut gasdicht ist. Während der Lagerung einer gefüllten Dose mit einem solchen Dosenverschluss kann deshalb zumindest in geringen Mengen Sauerstoff durch den Dosenverschluss hindurch in das Doseninnere eintreten und den Doseninhalt oxidieren, wodurch die Haltbarkeitsdauer verringert wird. Es ist deshalb wünschenswert, den störenden Sauerstoffeintritt durch den Dosenverschluss möglichst weitgehend zu minimieren. In dem bevorzugten Ausführungsbeispiel der Erfindung weist der Dosenverschluss deshalb zusätzlich zu dem Originalitätssicherungselement und dem Druckschott eine zusätzliche Gasbarriere auf, die vorzugsweise wesentlich gasdichter ist als das Originalitätssicherungselement und/oder das Druckschott. Die zusätzliche Gasbarriere minimiert den Sauerstoffeintritt durch den Dosenverschluss und verlängert dadurch die Haltbarkeitsdauer der verschlossenen Dose.The problem with such a can closure is the fact that plastic is not absolutely gas-tight. During the storage of a filled can with such a can closure, at least small amounts of oxygen can therefore enter the inside of the can through the can closure and oxidize the contents of the can, which reduces the shelf life. It is therefore desirable to minimize the disruptive ingress of oxygen through the can closure as much as possible. In the preferred embodiment of the invention, the can closure therefore has in addition to the tamper-evident element and the pressure bulkhead an additional gas barrier, which is preferably much more gas-tight than the tamper-evident element and / or the pressure bulkhead. The additional gas barrier minimizes the ingress of oxygen through the can closure and thereby extends the shelf life of the closed can.

Beispielsweise kann die Gasbarriere aus einer gasdichten Folie bestehen, jedoch sind im Rahmen der Erfindung auch andere Gestaltungen möglich.For example, the gas barrier can consist of a gas-tight film, but other designs are also possible within the scope of the invention.

Auch hinsichtlich der Anordnung der Gasbarriere in dem erfindungsgemäßen Dosenverschluss bestehen verschiedene Möglichkeiten. Beispielsweise kann die Gasbarriere zwischen dem Originalitätssicherungselement und dem Druckschott angebracht sein, beispielsweise auf der Außenseite des Druckschotts. Alternativ besteht die Möglichkeit, dass die Gasbarriere an der Innenseite des Druckschotts angebracht ist.There are also various possibilities with regard to the arrangement of the gas barrier in the can closure according to the invention. For example, the gas barrier can be attached between the tamper-evident element and the pressure bulkhead, for example on the outside of the pressure bulkhead. Alternatively, there is the possibility that the gas barrier is attached to the inside of the pressure bulkhead.

Weiterhin ist zu erwähnen, dass das Druckschott durch eine Rastverbindung in dem Dosenverschluss montiert sein kann, vorzugsweise in dem Verschlussunterteil des Verschlussaußenteils.It should also be mentioned that the pressure bulkhead can be mounted in the can closure by means of a latching connection, preferably in the closure lower part of the closure outer part.

Im montierten Zustand ist das Verschlussaußenteil mit dem Verschlussinnenteil verbunden, beispielsweise durch eine Schweißverbindung oder durch eine Klebeverbindung.In the assembled state, the outer closure part is connected to the inner closure part, for example by a welded connection or by an adhesive connection.

Ferner ist zu erwähnen, dass die Erfindung nicht nur Schutz beansprucht für den vorstehend beschriebenen erfindungsgemäßen Dosenverschluss. Vielmehr beansprucht die Erfindung auch Schutz für einen Dosendeckel, in dem bereits ein solcher erfindungsgemäßer Dosenverschluss vormontiert ist. Schließlich beansprucht die Erfindung auch Schutz für eine Dose (z. B. Milchdose, Getränkedose) mit einem solchen Dosendeckel mit einem vormontierten Dosenverschluss bzw. mit einem erfindungsgemäßen Dosenverschluss.It should also be mentioned that the invention not only claims protection for the above-described can closure according to the invention. Rather, the invention also claims protection for a can lid in which such a can closure according to the invention is already preassembled. Finally, the invention also claims protection for a can (e.g. Milk can, beverage can) with such a can lid with a preassembled can closure or with a can closure according to the invention.

Andere vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen gekennzeichnet oder werden nachstehend zusammen mit der Beschreibung des bevorzugten Ausführungsbeispiels der Erfindung anhand der Figuren näher erläutert. Es zeigen:

Figur 1
eine Perspektivansicht eines Dosendeckels (z. B. einer Milchdose oder Getränkedose) mit dem vormontierten erfindungsgemäßen Dosenverschluss in einer Auslieferungsstellung,
Figur 2
eine Perspektivansicht der Unterseite des Dosendeckels gemäß Figur 1,
Figur 3
eine Perspektivansicht des Dosendeckels aus den Figuren 1 und 2 in einer Gebrauchsstellung,
Figur 4
eine Perspektivansicht der Oberseite des Dosendeckels mit dem Dosenverschluss in einer Entnahmestellung,
Figur 5
eine Querschnittsansicht durch den Dosendeckel gemäß den Figuren 1-4 in der Auslieferungsstellung des Dosenverschlusses,
Figur 6
eine Querschnittsansicht durch den Dosendeckel gemäß den Figuren 1-5 in der Entnahmestellung,
Figur 7
eine Querschnittsansicht des Druckschotts in dem Dosenverschluss gemäß den Figuren 1-6,
Figur 8
eine vergrößerte Querschnittsansicht des Druckschotts mit einer zusätzlichen Gasbarriere an der Innenseite des Druckschotts, sowie
Figur 9
eine Abwandlung von Figur 8, wobei die Gasbarriere an der Außenseite des Druckschotts angebracht ist.
Other advantageous developments of the invention are characterized in the subclaims or are explained in more detail below together with the description of the preferred exemplary embodiment of the invention with reference to the figures. Show it:
Figure 1
a perspective view of a can lid (e.g. a milk can or beverage can) with the pre-assembled can closure according to the invention in a delivery position,
Figure 2
a perspective view of the underside of the can lid according to FIG Figure 1 ,
Figure 3
a perspective view of the can lid from FIG Figures 1 and 2 in a position of use,
Figure 4
a perspective view of the top of the can lid with the can closure in a removal position,
Figure 5
a cross-sectional view through the can lid according to FIGS Figures 1-4 in the delivery position of the can closure,
Figure 6
a cross-sectional view through the can lid according to FIGS Figures 1-5 in the removal position,
Figure 7
a cross-sectional view of the pressure bulkhead in the can closure according to FIG Figures 1-6 ,
Figure 8
an enlarged cross-sectional view of the pressure bulkhead with an additional gas barrier on the inside of the pressure bulkhead, and
Figure 9
a variation of Figure 8 , wherein the gas barrier is attached to the outside of the pressure bulkhead.

Die Zeichnungen zeigen ein bevorzugtes Ausführungsbeispiel eines erfindungsgemäßen Dosenverschlusses 1 für eine Dose aus Metall, wobei sich der erfindungsgemäße Dosenverschluss 1 insbesondere für eine Dose eignet, die im befüllten Zustand vor der Auslieferung pasteurisiert oder sterilisiert wird. Bei dieser Pasteurisierung bzw. Sterilisierung wird die Döse nämlich teilweise auf über +120°C erwärmt, was zu einem entsprechend hohen Doseninnendruck führt, der bei herkömmlichen Dosenverschlüssen zu einem ungewollten Herausbrechen eines Originalitätssicherungselements führen kann.The drawings show a preferred embodiment of a can closure 1 according to the invention for a metal can, the can closure 1 according to the invention being particularly suitable for a can which is pasteurized or sterilized in the filled state before delivery. In this pasteurization or sterilization process, the can is partially heated to over + 120 ° C, which leads to a correspondingly high internal can pressure which, with conventional can closures, can lead to an unwanted breakout of a tamper-evident element.

Bei der Montage wird der Dosenverschluss 1 in eine. Öffnung in einem aus Metall bestehenden Dosendeckel 2 der Getränkedose eingesetzt.During assembly, the can closure 1 is turned into a. Opening used in a metal can lid 2 of the beverage can.

Der Dosenverschluss 1 besteht im Wesentlichen aus einem Verschlussinnenteil 3 und einem Verschlussaußenteil 4, die beide aus Kunststoff bestehen und im montierten Zustand durch eine Klebeverbindung oder eine Schweißverbindung miteinander verbunden sind. Das Verschlussinnenteil 3 befindet sich im montierten Zustand innerhalb der Dose, während sich das Verschlussaußenteil 4 im montierten Zustand außerhalb der Getränkedose befindet und auf dem Dosendeckel 2 aufliegt.The can closure 1 consists essentially of an inner closure part 3 and an outer closure part 4, both of which are made of plastic and are connected to one another in the assembled state by an adhesive connection or a welded connection. The inner closure part 3 is located inside the can in the mounted state, while the outer closure part 4 is located outside the beverage can in the mounted state and rests on the can lid 2.

Das Verschlussaußenteil 4 besteht wiederum aus einem Verschlussunterteil 5 und einem Verschlussoberteil 6, wobei das Verschlussoberteil 6 durch ein Filmscharnier 7 schwenkbar an dem Verschlussunterteil 5 angebracht ist. Das Verschlussoberteil 6 kann also aus einer in Figur 1 gezeigten Auslieferungsstellung relativ zu dem Verschlussunterteil 5 in eine in Figur 3 gezeigte Gebrauchsstellung geschwenkt werden. In der Auslieferungsstellung gemäß Figur 1 liegt das Verschlussoberteil 6 flach auf dem Dosendeckel 2 auf. In der Gebrauchsstellung gemäß Figur 3 ist das Verschlussoberteil 6 dagegen auf das Verschlussunterteil 5 geklappt.The outer closure part 4 in turn consists of a lower closure part 5 and an upper closure part 6, the The upper closure part 6 is attached pivotably to the lower closure part 5 by a film hinge 7. The upper closure part 6 can therefore consist of an in Figure 1 Shown delivery position relative to the closure lower part 5 in a Figure 3 The position of use shown can be pivoted. In the delivery position according to Figure 1 the upper closure part 6 rests flat on the can lid 2. In the position of use according to Figure 3 however, if the upper part 6 of the closure is folded onto the lower part 5.

In dem Verschlussoberteil 6 befindet sich weiterhin ein Verschlussdeckel 8, der mittels eines Filmscharniers 9 schwenkbar an dem Verschlussoberteil 6 angebracht ist. Der Verschlussdeckel 8 kann deshalb aus einer in Figur 3 gezeigten Schließstellung in eine in Figur 4 gezeigte Entnahmestellung geschwenkt werden.In the upper closure part 6 there is also a closure cover 8 which is attached to the upper closure part 6 in a pivotable manner by means of a film hinge 9. The closure cover 8 can therefore consist of an in Figure 3 closed position shown in Figure 4 shown removal position are pivoted.

Durch das Verschlussinnenteil 3, das Verschlussunterteil 5 und das Verschlussoberteil 6 erstreckt sich hierbei eine Ausgießöffnung 10, durch die hindurch Flüssigkeit aus der Dose ausgegossen werden kann.A pouring opening 10, through which liquid can be poured out of the can, extends through the inner closure part 3, the lower closure part 5 and the upper closure part 6.

Zur Erleichterung des Ausgießens ist hierbei an dem Verschlussoberteil 6 eine Ausgießtülle 11 als Dosierhilfe angebracht.To facilitate pouring, a pouring spout 11 is attached to the upper closure part 6 as a metering aid.

Die Ausgießöffnung 10 wird im ungeöffneten Originalzustand durch ein Originalitätssicherungselement 12 verschlossen, wobei das Originalitätssicherungselement aus der Ausgießöffnung 10 herausgebrochen wird, wenn das Verschlussoberteil 6 auf das Verschlussunterteil 5 in die Gebrauchsstellung gemäß Figur 3 geklappt wird. Bei diesem Schwenkvorgang drückt nämlich ein an der Unterseite des Verschlussoberteils 6 angeformter, in dieser Ausführungsvariante ringförmig umlaufender Vorsprung 13 von oben auf das Originalitätssicherungselement 12 und bricht dieses dadurch aus der Ausgießöffnung 10 heraus.The pouring opening 10 is closed in the unopened original state by a tamper-evident element 12, the tamper-evident element being broken out of the pouring opening 10 when the upper closure part 6 is placed on the lower closure part 5 in the position of use according to FIG Figure 3 is folded. During this pivoting process, a pressure formed on the underside of the upper closure part 6, which in this embodiment variant is circumferential in a ring shape, presses Projection 13 from above onto the tamper-evident element 12 and thereby breaks it out of the pouring opening 10.

Darüber hinaus ist die Ausgießöffnung 10 im Originalzustand durch ein Druckschott 14 verschlossen, das die Aufgabe hat, den Doseninnendruck von dem Originalitätssicherungselement 12 fernzuhalten. Dies ist insbesondere dann sinnvoll, wenn es sich bei der Getränkedose um eine Dose handelt, die nach der Befüllung pasteurisiert oder sterilisiert wird. Bei der Pasteurisierung bzw. Sterilisierung wird die Dose nämlich auf eine Temperatur von bis über +120°C erwärmt, was zu einem entsprechend hohen Doseninnendruck führt. Das Originalitätssicherungselement 12 allein hält diesem hohen Doseninnendruck während Pasteurisierung bzw. Sterilisierung nicht Stand und würde deshalb bei der Pasteurisierung bzw. Sterilisierung herausbrechen, wodurch die Dose unbrauchbar würde. Das Druckschott 14 verhindert diese Beschädigung des Originalitätssicherungselements 12. Für diesen Zweck weist das Druckschott 14 eine wesentlich höhere Druckfestigkeit gegenüber dem Doseninnendruck auf als das Originalitätssicherungselement 12.In addition, the pouring opening 10 is closed in the original state by a pressure bulkhead 14, which has the task of keeping the pressure inside the can away from the tamper-evident element 12. This is particularly useful when the beverage can is a can that is pasteurized or sterilized after filling. During pasteurization or sterilization, the can is heated to a temperature of up to over + 120 ° C, which leads to a correspondingly high internal can pressure. The tamper-evident element 12 alone does not withstand this high internal can pressure during pasteurization or sterilization and would therefore break out during pasteurization or sterilization, which would render the can unusable. The pressure bulkhead 14 prevents this damage to the tamper-evident element 12. For this purpose, the pressure bulkhead 14 has a significantly higher compressive strength than the tamper-evident element 12 in relation to the pressure inside the can.

Hierbei ist zu erwähnen, dass das Druckschott 14 ebenfalls aus der Ausgießöffnung 10 herausgebrochen wird, wenn das Verschlussoberteil 6 in die in Figur 3 gezeigte Gebrauchsstellung geschwenkt wird. Figur 6 zeigt das herausgebrochene Originalitätssicherungselement 12 und das ebenfalls herausgebrochene Druckschott 14 in der Gebrauchsstellung nach dem Schwenken des Verschlussoberteils 6 auf das Verschlussunterteil 5.It should be mentioned here that the pressure bulkhead 14 is also broken out of the pouring opening 10 when the upper closure part 6 is in the in Figure 3 The position of use shown is pivoted. Figure 6 shows the tamper-evident element 12 broken out and the pressure bulkhead 14 also broken out in the position of use after pivoting the upper part 6 of the closure onto the lower part 5.

Das Druckschott 14 ist im Wesentlichen scheibenförmig aufgebaut und weist an seinem Umfangsrand eine Dichtlippe 15 auf, die vom Boden 16 zur Außenseite der Dose hin absteht, d. h. nach oben, wie aus Figur 7 ersichtlich ist. Bei einem erhöhten Doseninnendruck p, beispielsweise bei der Pasteurisierung oder Sterilisierung einer Dose, wird der Boden 16 des Druckschotts 14 zur Außenseite der Dose hin ausgewölbt, d. h. nach oben. Diese Auswölbung des Bodens 16 des Druckschotts 14 führt wiederum dazu, dass die Dichtlippe 15 an dem Druckschott 14 mit ihrem freien Ende in Pfeilrichtung radial nach außen gebogen wird. Dadurch erhöht sich der Anpressdruck der Dichtlippe 15 des Druckschotts 14 auf die zugehörige Dichtfläche in dem Dosenverschluss 1. Die Dichtwirkung des Druckschotts 14 nimmt also mit zunehmendem Doseninnendruck p zu.The pressure bulkhead 14 is constructed essentially in the form of a disk and has a sealing lip 15 on its peripheral edge which protrudes from the bottom 16 to the outside of the can, ie up how out Figure 7 can be seen. In the event of an increased internal can pressure p, for example during pasteurization or sterilization of a can, the bottom 16 of the pressure bulkhead 14 is bulged towards the outside of the can, ie upwards. This bulging of the bottom 16 of the pressure bulkhead 14 in turn leads to the sealing lip 15 on the pressure bulkhead 14 being bent radially outward with its free end in the direction of the arrow. As a result, the contact pressure of the sealing lip 15 of the pressure bulkhead 14 on the associated sealing surface in the can closure 1 increases. The sealing effect of the pressure bulkhead 14 thus increases with increasing can internal pressure p.

Aus Figur 7 ist weiterhin ersichtlich, dass das Druckschott 14 eine je nach Ausführungsvariante ringförmig umlaufende Versteifungsrippe 17 aufweist, wobei die Versteifungsrippe 17 in der Gebrauchsstellung in Deckung unter dem ebenfalls ringförmigen Vorsprung 13 an der Unterseite des Verschlussoberteils 6 liegen kann.Out Figure 7 It can also be seen that the pressure bulkhead 14 has an annular circumferential stiffening rib 17, depending on the design variant, the stiffening rib 17 in the position of use being able to lie under the likewise annular projection 13 on the underside of the upper part 6 of the closure.

Figur 8 zeigt, dass das Druckschott 14 im ungeöffneten Auslieferungszustand der Dose durch eine Rastverbindung in dem Verschlussunterteil 5 montiert ist. Hierzu weist die ringförmig umlaufende Dichtlippe 15 an ihrem freien Ende einen Rastvorsprung 18 auf, der in eine ebenfalls ringförmig umlaufende Rastaufnahme 19 in dem Verschlussunterteil 5 eingreift. Figure 8 shows that the pressure bulkhead 14 is mounted in the unopened delivery state of the can by a latching connection in the closure lower part 5. For this purpose, the annular circumferential sealing lip 15 has at its free end a latching projection 18 which engages in a likewise annular circumferential latching receptacle 19 in the closure lower part 5.

Zum einen bilden der Rastvorsprung 18 und die Rastaufnahme 19 zusammen die Rastverbindung, die das Druckschott 14 in dem Verschlussunterteil 5 fixiert.On the one hand, the latching projection 18 and the latching receptacle 19 together form the latching connection which fixes the pressure bulkhead 14 in the closure lower part 5.

Zum anderen bilden der Rastvorsprung 18 und die Rastaufnahme 19 aber auch eine Dichtung, welche die Ausgießöffnung 10 abdichtet. Die vorstehend erwähnte Auswölbung des Bodens 16 des Druckschotts 14 aufgrund des Doseninnendrucks p führt dann dem Rastvorsprung 18 und der Rastaufnahme 19, wodurch eine gute Dichtwirkung erzielt wird, die mit zunehmendem Doseninnendruck p noch besser wird.On the other hand, the latching projection 18 and the latching receptacle 19 also form a seal which seals the pouring opening 10. The above-mentioned bulging of the bottom 16 of the pressure bulkhead 14 due to the can internal pressure p then leads the locking projection 18 and the locking receptacle 19, whereby a good sealing effect is achieved, which becomes even better with increasing can internal pressure p.

Darüber hinaus zeigt Figur 8, dass an der Unterseite des Druckschotts 14 eine zusätzliche Gasbarriere 20 angebracht ist, die in diesem Ausführungsbeispiel aus einer gasdichten Folie besteht. Die Gasbarriere 20 verringert während der Lagerung der Dose den Eintritt von Sauerstoff in die Dose, wodurch die Haltbarkeit verbessert wird.It also shows Figure 8 that an additional gas barrier 20 is attached to the underside of the pressure bulkhead 14, which in this embodiment consists of a gas-tight film. The gas barrier 20 reduces the ingress of oxygen into the can during storage of the can, thereby improving durability.

Figur 9 zeigt eine Abwandlung von Figur 8, so dass zur Vermeidung von Wiederholungen auf die vorstehende Beschreibung zu Figur 8 verwiesen wird, wobei für entsprechende Einzelheiten dieselben Bezugszeichen verwendet werden. Figure 9 shows a modification of Figure 8 so as to avoid repetition refer to the description above Figure 8 is referred to, the same reference numerals being used for corresponding details.

Eine Besonderheit dieses Ausführungsbeispiels besteht darin, dass die Gasbarriere 20 nicht - wie bei Figur 8 - an der Unterseite des Druckschotts 14 angeordnet ist, sondern an der Oberseite des Druckschotts 14.A special feature of this embodiment is that the gas barrier 20 is not - as in Figure 8 - Is arranged on the underside of the pressure bulkhead 14, but on the top of the pressure bulkhead 14.

Die Erfindung ist nicht auf das vorstehend beschriebene bevorzugte Ausführungsbeispiel beschränkt. Vielmehr ist eine Vielzahl von Varianten und Abwandlungen möglich, die ebenfalls von dem Erfindungsgedanken Gebrauch machen und deshalb in den Schutzbereich fallen.The invention is not restricted to the preferred exemplary embodiment described above. Rather, a large number of variants and modifications are possible which also make use of the inventive concept and therefore fall within the scope of protection.

Bezugszeichenliste:List of reference symbols:

11
DosenverschlussCan closure
22
DosendeckelCan lid
33
VerschlussinnenteilInner closure part
44th
VerschlussaußenteilClosure outer part
55
Verschlussunterteil des VerschlussaußenteilsClosure bottom part of the closure outer part
66
Verschlussoberteil des VerschlussaußenteilsClosure top part of the closure outer part
77th
Filmscharnier zwischen Verschlussoberteil und VerschlussunterteilFilm hinge between the upper part of the fastener and the lower part
88th
VerschlussdeckelSealing cap
99
Filmscharnier zwischen Verschlussdeckel und VerschlussoberteilFilm hinge between the lid and the upper part of the lock
1010
AusgießöffnungPouring opening
1111
Ausgießtülle an dem VerschlussunterteilPouring spout on the lower part of the closure
1212th
OriginalitätssicherungselementTamper evident element
1313
Vorsprung an der Unterseite des VerschlussoberteilsProtrusion on the underside of the upper part of the closure
1414th
DruckschottPressure bulkhead
1515th
Dichtlippe an dem DruckschottSealing lip on the pressure bulkhead
1616
Boden des DruckschottsBottom of the pressure bulkhead
1717th
Versteifungsrippe an der Oberseite des DruckschottsStiffening rib on the top of the pressure bulkhead
1818th
Rastvorsprung an der DichtlippeLatching protrusion on the sealing lip
1919th
Rastaufnahme in dem VerschlussunterteilLocking receptacle in the lower part of the closure
2020th
GasbarriereGas barrier
pp
DoseninnendruckCan internal pressure

Claims (15)

  1. Can closure (1) for insertion into a can lid (2) of a can, having
    a) a pouring opening (10) for pouring liquid from the can,
    b) an outer closure part (4) which, in the assembled state, is located outside the can and is inserted into a can opening in the can lid (2),
    c) an inner closure part (3) which, in the assembled state, is joined to the outer closure part (4) and is supported from below on the can lid (2) and is located inside the can,
    d) a tamper-evident element (12) which closes the pouring opening (10) in the original state and can be broken open for pouring in order to release the pouring opening (10), and
    e) a pressure bulkhead (14) which closes the pouring opening (10) on the inside of the tamper-evident element (12) and thereby keeps the internal can pressure (p) away from the tamper-evident element (12), wherein the pressure bulkhead (14) can be broken open for pouring to release the pouring opening (10),
    characterized in that the outer closure part (4) comprises:
    f) a lower closure part (5) which, in the assembled state, is inserted into a can opening in the can lid (2), the pouring opening (10) extending through the lower closure part (5) and the inner closure part (3) and the outer closure part (4), and
    g) an upper closure part (6) which is pivotably connected to the lower closure part (5), the pouring opening (10) extending through the upper closure part (6) and the upper closure part (6) being pivotable from a delivery position into a position of use.
  2. Can closure (1) according to claim 1,
    characterized in
    a) that the pressure bulkhead (14) has a substantially greater pressure resistance to the internal can pressure (p) than the tamper-evident element (12), and/or
    b) that the pressure bulkhead (14) has a pressure resistance of at least 2 bar, 3 bar, 4 bar, 5 bar, 6 bar or at least 7 bar with respect to the internal can pressure (p), and/or
    c) that the pressure bulkhead (14) is substantially more impermeable to gas than the tamper-evident element (12) in order to prevent oxygen from entering the can and thereby improve the durability of the can contents.
  3. Can closure (1) according to any of the preceding claims, characterized in
    a) that the pressure bulkhead (14) is substantially disc-shaped and is inserted in the original state into the pouring opening (10), and
    b) that the pressure bulkhead (14) has a sealing lip (15) which runs annularly around the circumferential edge of the pressure bulkhead (14), projects outwardly from the pressure bulkhead (14) toward the outside of the nozzle, and bears sealingly against a circumferential sealing surface on the inner wall of the pouring opening (10).
  4. Can closure (1) according to claim 3,
    characterized in
    a) that the disc-shaped pressure bulkhead (14) bulges with its base (16) upwards and outwards when subjected to a pressure load by the internal can pressure (p), as a result of which the outer end of the annularly circumferential sealing lip (15) of the pressure bulkhead (14) is pressed axially and radially outwards against the circumferential sealing surface (19), and/or
    b) that the sealing effect between the sealing lip (15) of the pressure bulkhead (14) on the one hand and the sealing surface (19) of the can closure (1) on the other hand improves with increasing can internal pressure (p).
  5. Can closure (1) according to one of claims 3 or 4,
    characterized in
    a) that the pressure bulkhead (14) is integral with the integrally formed sealing lip (15), or
    b) that the pressure bulkhead (14) is multi-part and has a base body and a separate seal.
  6. Can closure (1) according to one of the preceding claims, characterized in
    a) that the pressure bulkhead (14) is mounted in the lower closure part (5) of the outer closure part (4), and
    b) that the pressure bulkhead (14) comprises a stiffening rib (17), and
    c) that the stiffening rib (17) runs in an annular manner in the pressure bulkhead (14), and
    d) that the stiffening rib (17) is attached to the outside of the pressure bulkhead (14).
  7. Can closure (1) according to one of the preceding claims, characterized in that the can inner pressure (p) presses the inner closure part (3) from below against the underside of the can lid (2).
  8. Can closure (1) according to one of the preceding claims, characterized in that the outer closure part (4) comprises:
    a) a first film hinge (7) between the upper closure part (6) and the lower closure part (5) to enable the pivotal movement of the upper closure part (6) relative to the lower closure part (5), and/or
    b) a closure lid (8) which is pivotably attached to the upper closure part (6), in particular by a second film hinge (9), in particular in order to selectively close the pouring opening (10) in the upper closure part (6) in a closed position or to open it in a removal position.
  9. Can closure (1) according to claim 8,
    characterized in
    a) that the upper closure part (6) breaks out the tamper-evident element (12) and the pressure bulkhead (14) from the pouring opening (10) when the upper closure part (6) is pivoted from the delivery position into the use position, and
    b) that the upper closure part (6) has on its underside at least one projection (13) which projects downwards and facilitates the breaking out of the tamper-evident element (12) and the pressure bulkhead (14), and
    c) that the projection (13) on the underside of the upper closure part (6) is essentially annular and, when the upper closure part (6) is folded onto the lower closure part (5), preferably lies in a depressed position above the annular reinforcing rib (17) in the pressure bulkhead (14).
  10. Can closure (1) according to one of the preceding claims, characterized in
    a) that the can closure (1) has, in addition to the tamper-evident element (12) and the pressure bulkhead (14), an additional gas barrier (20) to prevent oxygen ingress into the can and thereby improve the shelf life of the can contents, and
    b) that the gas barrier (20) is less gas permeable than the tamper-evident element (12) and the pressure bulkhead (14), and
    c) that the gas barrier (20) is a gas-tight film.
  11. Can closure according to claim 10,
    characterized in
    a) that the gas barrier (20) is arranged between the tamper-evident element (12) and the pressure bulkhead (14), in particular on the outside of the pressure bulkhead (14), or
    b) that the gas barrier (20) is arranged on the inside of the pressure bulkhead (14).
  12. Can closure (1) according to one of the preceding claims, characterized in
    a) that the pressure bulkhead (14) is secured in the can closure (1) by a snap-in connection (18, 19), and
    b) that the latching connection (18, 19) comprises an annularly encircling latching projection (18) in the pressure bulkhead (14) and an annularly encircling latching receptacle (19) in the closure bottom part (5), and
    c) that the annularly encircling latching projection (18) is located at the free end of the sealing lip (15), and
    d) that the latching connection (18, 19) between the can closure (1) and the pressure bulkhead (14) can be released by pressing the pressure bulkhead (14) out of the can closure (1) into the can interior.
  13. Can closure (1) according to one of the claims 7 to 12, characterized in
    a) that the outer closure part (4), the inner closure part (3), the upper closure part (6), the lower closure part (5) and/or the closure lid are made of plastic, and/or
    b) that the outer closure part (4) is connected to the inner closure part (3) by a welded connection or an adhesive connection, in particular by a welded connection or an adhesive connection between the inner closure part (3) and the lower closure part (5), and/or
    c) that a pouring spout (11) is integrally formed on the upper closure part (6) in order to facilitate drip-free pouring of the liquid from the can, and/or
    d) that the tamper-evident element (12) is fitted in the inner closure part (3) or in the lower closure part (5) of the outer closure part (4).
  14. Can lid (2), in particular made of metal, with a can closure (1) according to one of the preceding claims.
  15. Can, in particular beverage can, in particular milk can, which is heated during sterilization of the can contents, having a can closure (1) according to one of claims 1 to 13 or a can lid according to claim 14.
EP15780764.5A 2015-01-26 2015-10-12 Can closure, in particular for a milk can Active EP3250463B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015000914.1A DE102015000914B3 (en) 2015-01-26 2015-01-26 Can closure, especially for a milk can
PCT/EP2015/002005 WO2016119799A1 (en) 2015-01-26 2015-10-12 Can closure, in particular for a milk can

Publications (2)

Publication Number Publication Date
EP3250463A1 EP3250463A1 (en) 2017-12-06
EP3250463B1 true EP3250463B1 (en) 2021-02-17

Family

ID=54053887

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15780764.5A Active EP3250463B1 (en) 2015-01-26 2015-10-12 Can closure, in particular for a milk can

Country Status (4)

Country Link
EP (1) EP3250463B1 (en)
DE (1) DE102015000914B3 (en)
ES (1) ES2856048T3 (en)
WO (1) WO2016119799A1 (en)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4431110A (en) * 1982-11-09 1984-02-14 Continental Can Company, Inc. Child resistant tamper indicating closure
EP0221843B1 (en) * 1985-10-04 1989-06-14 Alcan Rorschach AG Lid made of laminate with an opening closed by a strip member,and method for making it
DE19961031A1 (en) * 1999-12-16 2001-06-21 Heinrich Stolz Gmbh Closure
US6685055B2 (en) * 2000-05-30 2004-02-03 Sig Combibloc Inc. Flip-top container closure apparatus
BR0303203B1 (en) * 2003-07-31 2012-08-07 insert for beverage cans in general.
US7823740B2 (en) * 2004-01-13 2010-11-02 Bound2B B.V. Device for sealing foodstuff containers and foodstuff container provided with such a device
US8240498B2 (en) * 2006-10-31 2012-08-14 Crown Packaging Technology, Inc. Resealable closure
CA2668038A1 (en) * 2006-10-31 2008-05-08 Crown Packaging Technology Inc. Resealable closure
CA2738097A1 (en) * 2008-09-22 2010-03-25 3L Distribution Package provided with a leaktight opening and closing device
DE202011101705U1 (en) * 2011-06-10 2011-09-12 Euro-Cap Gmbh Closure for a liquid container, in particular for a beverage can
DE102013003154B3 (en) * 2013-02-25 2014-01-16 Euro-Cap Gmbh can closure

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
DE102015000914B3 (en) 2015-09-24
WO2016119799A1 (en) 2016-08-04
ES2856048T3 (en) 2021-09-27
EP3250463A1 (en) 2017-12-06

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