EP0690011B1 - Schwimmender Metalleinsatz für Getränkebehälter - Google Patents

Schwimmender Metalleinsatz für Getränkebehälter Download PDF

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Publication number
EP0690011B1
EP0690011B1 EP94420186A EP94420186A EP0690011B1 EP 0690011 B1 EP0690011 B1 EP 0690011B1 EP 94420186 A EP94420186 A EP 94420186A EP 94420186 A EP94420186 A EP 94420186A EP 0690011 B1 EP0690011 B1 EP 0690011B1
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EP
European Patent Office
Prior art keywords
cover
edge
insert
skirt
seal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP94420186A
Other languages
English (en)
French (fr)
Other versions
EP0690011A1 (de
Inventor
Jacques Granger
Yves Peyrin
Dominique Petit
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.)
Pechiney Emballage Alimentaire
Original Assignee
Pechiney Emballage Alimentaire
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pechiney Emballage Alimentaire filed Critical Pechiney Emballage Alimentaire
Priority to AT94420186T priority Critical patent/ATE176444T1/de
Priority to DK94420186T priority patent/DK0690011T3/da
Priority to EP94420186A priority patent/EP0690011B1/de
Priority to DE69416398T priority patent/DE69416398T2/de
Publication of EP0690011A1 publication Critical patent/EP0690011A1/de
Application granted granted Critical
Publication of EP0690011B1 publication Critical patent/EP0690011B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
    • B65D85/70—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for
    • B65D85/72—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for for edible or potable liquids, semiliquids, or plastic or pasty materials
    • B65D85/73—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for for edible or potable liquids, semiliquids, or plastic or pasty materials with means specially adapted for effervescing the liquids, e.g. for forming bubbles or beer head

Definitions

  • the invention relates to the field of packaging of carbonated or carbonated drinks in easy-to-open packaging, typically beverage cans.
  • the pressure in these packages is generally higher than atmospheric pressure, and upon opening, bubbles are released and possible foaming.
  • the invention relates to an insert to be introduced into the beverage can during packaging of said beverage and intended to promote, by ejection of gas from the insert into said beverage, the formation of foam when opening said beverage can, especially when said drink is beer.
  • floating inserts Such floating insert is described in Figure 2 of the application for WO 91/07326. It consists of an enclosure, in plastic material, ballasted with a weight orientating said pregnant with respect to the liquid plane of said drink, and comprising a single opening, located below the line flotation, by which, when opening the box, the gas contained in the insert is injected into said drink.
  • the opening has closing means sensitive to the difference of pressure between the internal pressure (in the insert) and the external pressure (in the container).
  • This means can be a rupture disc or valve that releases the gaseous content of the insert as soon as, when opening the container, the pressure drops inside of it.
  • the deformation of the plastic insert during heat treatments, for example pasteurization allow internal and external pressures to be balanced. Furthermore, it is known that the inserts can operate with, as a closure means, an orifice of small dimensions ( ⁇ 0.5 mm in diameter).
  • the insert according to the invention is defined by the characteristics of claim 1.
  • the Applicant first had the idea of a floating metal insert (MFI for short) designed so as to reduce its manufacture to an assembly of parts in themselves simple to manufacture, whether it is the body of box or cover intended to form said metallic enclosure. She was surprised to note that despite the use of a metallic material, it was possible, also using inexpensive means which are easy to implement industrially, to maintain the migration of metallic ions at the - below the admitted threshold.
  • MFI floating metal insert
  • Figure 1 is a sectional view of a drink box (18) with easy opening, filled with a drink (19) on the surface (25) of which floats said metallic insert IMF (1), formed by assembling a box body (3) and a converge (10), said box body being essentially surrounded by the head space (20), said cover, provided with a lower orifice (12) of small diameter, being immersed in said drink, and generally below the liquid level (25).
  • FIG. 2 shows said cover (10), round, in a sectional view along a plane containing the axis of symmetry of the cover.
  • This cover (10) has an edge (11) intended for assembly with said box body (3), a re-entrant peripheral part (13) and a central part (14) forming a bowl and carrying said lower orifice (12) of 0.3 mm in diameter, intended for the passage of the gas flow during the opening of said container (18).
  • FIG 3 shows a box body (3) round according to the invention intended to be assembled in a sealed manner with the cover of Figure 2 (sectional view along a plane containing the axis of symmetry of the box body).
  • This box body (3) consists of a bottom (4), a side skirt (5) having, a short distance from the end (6) of the skirt, a shoulder (8), surmounted by a portion of skirt (26) of low relative height, and on which said edge (11) of the cover (10) is intended to bear during the assembly of said cover (10) and said box body (3), via a peripheral seal (15).
  • Figure 4 is an enlarged view, in section similar to that Figures 2 and 3, the assembly of the cover (10) and the box body (3): the edge (11) of the cover is pinched between the rolled edge (9) obtained by rolling the end (6) of the skirt (5), and the shoulder (8) coated with a seal (15), so that the edge edge (21) and the edge (23) of the end of the box body are embedded in the material constituting the seal (15).
  • FIG. 5 represents a sectional view of an MFI constituted by the metal enclosure (2) formed by assembling the body of box (3) and cover (10), the method of assembly being that shown enlarged in Figure 4.
  • the enclosure (2) On this figure are indicated different dimensions of the enclosure (2) : the large diameter D, the small diameter d, and the height H.
  • Figures 6 and 6a similar to Figure 4, illustrate other means of subtracting the slices (21,23) from contact with said drink, that is, in FIG. 6, in inserting a peripheral seal (15) between the edge of the cover (11) and the rolled edge (9), that is, in FIG. 6a, by masking the edge (23) of the box body by rolling more accentuated from the end (6) of the skirt (5).
  • Figures 7a and 7b show an alternative assembly by crimping said box body and said cover, by rolling the curved edge (11a) of said cover around the edge dropped (6a) from said box body, curved edge externally and carrying a seal ring (15), so as to ensure, after crimping, the tightness of said assembly, and to drown in minus the edge (21) of the edge of said cover (10), as well as the edge (23) of the end of the box body.
  • FIG. 8a similar to FIG. 1, shows in section a MFI according to the invention comprising a lower orifice (12) and an upper orifice (7), each of these orifices, with a diameter of the order of 1 to 3mm, being provided with a non-return valve, referenced (17) for the lower orifice (12), and (16) for the upper orifice (7).
  • FIG. 8b shows an example of a non-return valve, comprising a flexible strip (27) fixed by an adhesive (28) on the outside of the cover, so as to allow the exit of the gas flow from the insert to said drink.
  • the non-return valve (16) of the upper orifice (7) is fixed to the inner surface of the bottom (4), so as to allow only one flow inlet from the head space towards the inside the insert.
  • said peripheral seal (15) can be positioned in different ways depending on the type of assembly, so as to prevent contact between said drink (19) and the edges (23,21) of said box body and said cover.
  • said assembly is formed by pinching the edge (11) of said cover (10) between a shoulder (8) of said side skirt (5) and a rolled edge internally (9) from said end (6) of said skirt (5).
  • said seal peripheral (15) adheres to the inner face of said shoulder (8) and of the skirt portion (26) between said shoulder (8) and said end (6), so that said slices (21,23) of said cover and of said body box are embedded in said seal (15).
  • said peripheral seal (15) can also form a tight bead between said edge of the cover (11) and said internally rolled edge (9).
  • the sections (21,23) are not embedded in the joint as in the previous case.
  • FIG. 6a represents a variant of FIG. 4, where only the edge (21) of the cover is embedded in the joint, while the edge (23) of the rolled edge (9) is not, taking into account the rolling more important in this case.
  • the rolled edge (9) must have a diameter between 1 mm and 4 mm, for a skirt end of thickness less than 0.35, so as to withstand a relative internal pressure greater than 0.6 MPa. In fact, when the container is opened, there suddenly develops a large pressure difference on either side of the metal enclosure (2) forming the MFI, which can cause the rolled edge to "unwind" ( 9), and consequently the ineffectiveness of said insert.
  • said assembly is formed by crimping the edge (11a) of the cover with the end of said skirt forming an edge fallen (6a), said peripheral seal (15) adhering to the outer surface of said fallen edge (6a), so that, at least said edge (21) of said cover is embedded in said joint.
  • an MFI (1) in which the section of said insert is, at its largest diameter D or D '(see Figures 5, 6, 6a, 7b), at least 15% greater than the section of said insert at said bottom.
  • Another complementary means contributing to making the orientation of the MFI (1) more reliable consists in choosing the weight of the cover (10) at least equal to 0.5 times that of the box body (3). For that, it is enough to start from a thicker metal strip to make the cover than to make the box body. This reinforces the "tilting" effect of the MFI, in the sense that the MFI always tends to regain its optimum orientation, whatever the efforts exerted tending to tilt it sideways.
  • the Applicant has studied the impact of the shape of the cover on the stability of the MFI, in particular during the opening of said container.
  • the Applicant has observed that the shape of the cover could also make a contribution to the solution of the problem posed.
  • said cover comprises a re-entrant peripheral part (13) intended to facilitate centering of said cover (10) relative to said side skirt (5).
  • a cover as described above has led to more stable and better oriented MFIs - that is to say MFIs always repositioning themselves in the desired way ("tumble effect") - than those obtained, for example, with a cover comprising a flat central part.
  • the reentrant peripheral part (13) plays a stabilizing role by the liquid ring formed trapped under said reentrant peripheral part (13).
  • This preferred configuration of cover very greatly reduces the tendency of prior art MFIs to "take off” when the container (18) is opened by the propellant effect of the gas jet leaving the MFI. .
  • the re-entrant peripheral part (13) would lead to a "suction cup” effect tending to "join” - perhaps by wetting effect and surface tension - the base of the MFI and its element surrounding liquid.
  • the re-entrant peripheral part (13) of the cover also appears advantageous to facilitate the assembly of the cover (10) with the box body (3) and the centering of one relative to the other, centering which contributes to guarantee a good orientation of the MFI.
  • this re-entrant peripheral part (13) allows, by pressing against the shoulder (8) during assembly of the cover and the box body, to make obligatorily creep the seal (15) upwards, and thus to drown in the seal (15) at least the edge (21) of the cover, if not the edge (23) of the rolled edge (9).
  • the MFI according to the invention can also have two orifices, a lower orifice (12) on the cover (10), and an upper orifice (7) on the bottom (4) of the box body (3).
  • these orifices are provided with non-return valves.
  • FIG. 8b represents a typical non-return valve, made of inert elastomeric material. These valves are mounted so as to close said orifices only in one direction, with respect to said metal enclosure: in the "outside ->inside” direction for the upper non-return valve (16), in the "inside -> outside direction. "for the lower non-return valve (17).
  • the upper (16) and lower (17) valves can be either identical or different, each of them being adapted to its own environment (head space or drink).
  • Other non-return valve configurations are possible according to the invention insofar as they allow the aims of the invention to be achieved.
  • said metal enclosure (2) is in aluminum or aluminum alloy, or steel, and is coated a protective layer, usually a layer of varnish or sometimes a layer of plastic film, forming a barrier for said drink.
  • the same metal is chosen for the MFI (1) and for the container (18), which can therefore be made of aluminum or an alloy aluminum, or steel.
  • said metal enclosure is, preferably aluminum or aluminum alloy.
  • the interior volume of said metal enclosure (2) is related to the capacity of said container (18), and is preferably between 0.005 and 0.02 times the interior volume of said container.
  • said insert has an interior volume of 7 cm 3 (volume between 6.8 and 7.2 cm 3 ) for an interior volume of said container of 500 cm 3 .
  • said box body (3) and said cover (10) adapted to said box body, therefore said final MFI are round in shape, for reasons of ease of manufacture and of MFI orientation stability, and said MFI presents a height H / outside diameter D ratio measured at level of said rolled edge, or of the largest diameter, between 0.4 and 1. See Figure 5.
  • Another object of the invention is a method for manufacturing the MFIs according to the invention. This method comprises the steps as defined in claim 9.
  • the MFIs obtained were tested using two methods.
  • MFIs were tested and observed using a device comprising a transparent container, similar to a container (18 ), and containing an IMF (1), this container can be oriented in all directions and can simulate the various situations (shock, pasteurization, opening of the can, etc.) to which the beverage canisters are subjected. It was observed that the MFIs according to the invention had a remarkable "tumble" effect, great orientation stability, including, which is important, when opening the box. It is thanks to this type of device that the configuration and the dimensions of the MFIs according to the invention have been selected, numerous tests having been carried out before arriving at the general and particular means of the invention.
  • the invention makes it possible to solve all of the problems posed, whether it is the technical efficiency of the MFI, its chemical inertia during a prolonged stay in said drink, or its manufacturing cost greatly reduced by compared to the inserts of the prior art.
  • MFIs only requires manufacturers' standard technology, requiring only stamping tools adapted to the shape of the box body and the cover of the metal enclosure, this which is another advantage of the invention.
  • An additional advantage of the invention lies in the choice metallic material constituting the main part of MFIs.
  • the drink boxes being generally recycled, especially when made of aluminum alloy, the use of MFIs in the same metal or alloy as that of the beverage can allows on the one hand to exclude practically any risk of corrosion by electrochemical cell effect between the two materials, and above all facilitates the recycling of metal from the set "drink box + insert".

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Table Devices Or Equipment (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)
  • Control Of Driving Devices And Active Controlling Of Vehicle (AREA)
  • Tea And Coffee (AREA)

Claims (11)

  1. Metalleinsatz (1) zum Einführen in einen Behälter (18) für ein unter Druck stehendes Getränk (19), über dem sich ein oberer Raum (20) erhebt, der dazu bestimmt ist, beim Öffnen des Behälters die Bildung von Schaum zu fördern, umfassend ein Gehäuse (2) mit mindestens einer unteren Öffnung (12), die unter dem von dem Getränk gebildeten Flüssigkeitsspiegel (25) liegen soll und einen Gastransfer vom Raum (2) zum Getränk (19) ermöglicht, wobei das Gehäuse (2) metallisch ist und durch Verbindung eines Gehäusekörpers (3) gebildet wird, und aus einem Boden (4) und einem Seitenteil (5) besteht, dessen Ende (6) die Öffnung des Gehäusekörpers bildet, sowie aus einem Deckel (10), so daß die Öffnung des Gehäusekörpers mit dem Deckel verschlossen wird, dadurch gekennzeichnet, daß
    a) der Deckel (10) mit der unteren Öffnung (12) versehen ist, wobei das Gewicht des Deckels (10) so gewählt wird, daß es mindestens dem 0,5-fachen Gewicht des Gehäusekörpers (3) entspricht, damit der Einsatz, der schwimmen soll, korrekt mit dem Kopf nach unten ausgerichtet bleibt
    b) eine umlaufende Dichtung (15), die die Abdichtung der Verbindung gewährleistet, so angeordnet ist, daß der Kontakt zwischen dem Getränk (19) und den Kanten (23, 21) des Gehäusekörpers und Deckels vermieden wird, wobei die Verbindung dadurch hergestellt wird, daß entweder der Rand (11) des Deckels zwischen einem Ansatz (8) des Seitenteils und einem einwärts gerollten Rand (9) des Endes (6) des Seitenteils eingequetscht wird oder der Deckelrand (11a) mit dem einen herabfallenden Rand (6a) bildenden Ende des Seitenteils eingefasst wird, so daß mindestens die Deckelkante (21) in der Dichtung eingebettet ist.
  2. Einsatz nach Anspruch 1, dadurch gekennzeichnet, daß die umlaufende Dichtung (15) an der Innenseite des Ansatzes (8) und des Seitenteilabschnittes (26) zwischen dem Ansatz und dem Ende anliegt, so daß die Kanten (21, 23) des Deckels und des Gehäusekörpers in der Dichtung (15) eingebettet sind.
  3. Einsatz nach Anspruch 1, dadurch gekennzeichnet, daß die Dichtung (15) eine dichte Verbindungsstelle zwischen dem Rand (11) des Deckels und dem einwärts gerollten Rand (9) bildet.
  4. Einsatz nach einem der Ansprüche 1 bis 3, bei dem der Durchmesser des gerollten Randes (9) bei einem Weniger als 0,35 mm dicken Seitenflächenende 1 bis 4 mm bei beträgt, um einem relativen Innendruck von über 0,6 MPa standzuhalten.
  5. Einsatz nach einem der Ansprüche 1 bis 4, bei dem der Querschnitt des Einsatzes (1) im Bereich seines größten Durchmessers D oder D' mindestens 15 % größer ist als der Querschnitt des Einsatzes im Bereich des Bodens.
  6. Einsatz nach einem der Ansprüche 1 bis 5, bei dem der Deckel (10) einen einspringenden Randbereich (13) aufweist, der die Zentrierung des Deckels (10) in Bezug auf die Seitenfläche (5) erleichern soll.
  7. Einsatz nach einem der Ansprüche 1 bis 6, bei dem das Gewicht des Deckels (10) so gewählt ist, daß es mindestens dem 0,5-fachen Gewicht des Gehäusekörpers (3) entspricht, indem für die Herstellung des Deckels ein dickeres Metallband verwendet wird als das, das für die Herstellung des Gehäusekörpers verwendet wird.
  8. Einsatz nach einem der Ansprüche 1 bis 7, bei dem das Metallgehäuse (2) aus Aluminium oder einer Aluminiumlegierung ist.
  9. Verfahren zur Herstellung eines Einsatzes nach einem der Ansprüche 1 bis 8, mit folgenden Schritten :
    a) ausgehend von bandförmigem, mit einer Schutzschicht überzogenem Metall wird durch Tiefziehen ein Gehäusekörper (3) hergestellt, der ein Seitenteil und einen zwischen zwei Abschnitten des Seitenteils gelegenen Ansatz (8) sowie einen Deckel (10) aufweist, welcher mit einer Öffnung (12) und einem an den Gehäusekörper (3) angepaßten Rand (11) versehen ist, wobei das bandförmige Metall zur Bildung des Deckels (10) dicker ist als das bandförmige Metall zur Bildung des Gehäusekörpers (3),
    b) der Deckel (10) und der Körper werden miteindander verbunden, indem der Rand des Deckels zwischen dem Ansatz des Seitenteils und dem einwärts gerollten Rand des Seitenteilendes eingequetscht wird, so daß die Kanten (21, 23) des Deckels und des Gehäusekörpers durch die Dichtung geschützt sind und mit dem Getränk nicht in Kontakt kommen können, und indem eine Dichtung auf dem Ansatz des Gehäusekörpers oder auf dem Rand des Deckels angebracht wird.
  10. Verfahren nach Anspruch 9, bei dem im Schritt b) des Verfahrens der Rand einwärts gerollt und gleichzeitig an den Deckel (10) gedrückt wird, so daß die Kante (23) des Gehäusekörpers - insbesondere dank der Elastizität der Dichtung (15) - die den Deckel (10) überziehende Schutzschicht während des Rollens nicht beschädigt.
  11. Verfahren nach Anspruch 10, bei dem der Ansatz während des Einwärtsrollens des Randes von einer Matrize abgestützt wird, um das Andrücken zu erleichtern.
EP94420186A 1994-07-01 1994-07-01 Schwimmender Metalleinsatz für Getränkebehälter Expired - Lifetime EP0690011B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AT94420186T ATE176444T1 (de) 1994-07-01 1994-07-01 Schwimmender metalleinsatz für getränkebehälter
DK94420186T DK0690011T3 (da) 1994-07-01 1994-07-01 Flydende metalindsats til drikkevaredåse
EP94420186A EP0690011B1 (de) 1994-07-01 1994-07-01 Schwimmender Metalleinsatz für Getränkebehälter
DE69416398T DE69416398T2 (de) 1994-07-01 1994-07-01 Schwimmender Metalleinsatz für Getränkebehälter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP94420186A EP0690011B1 (de) 1994-07-01 1994-07-01 Schwimmender Metalleinsatz für Getränkebehälter

Publications (2)

Publication Number Publication Date
EP0690011A1 EP0690011A1 (de) 1996-01-03
EP0690011B1 true EP0690011B1 (de) 1999-02-03

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Application Number Title Priority Date Filing Date
EP94420186A Expired - Lifetime EP0690011B1 (de) 1994-07-01 1994-07-01 Schwimmender Metalleinsatz für Getränkebehälter

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EP (1) EP0690011B1 (de)
AT (1) ATE176444T1 (de)
DE (1) DE69416398T2 (de)
DK (1) DK0690011T3 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9525630D0 (en) * 1995-12-15 1996-02-14 Paktek Ltd An insert for a drinks container
US6390292B2 (en) 1997-06-11 2002-05-21 Carlton And United Breweries Limited Container for separately storing flowable materials but allowing mixing of materials when required
CN1107627C (zh) * 1997-06-11 2003-05-07 卡尔顿联合酿酒有限公司 能单独盛装流动物并在需要时允许流动物混合的容器

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IE70665B1 (en) * 1989-11-22 1996-12-11 Whitbread & Co Plc Carbonated beverage container
GB9218003D0 (en) * 1992-08-24 1992-10-07 Alcan Int Ltd Container
CH686948A5 (de) * 1992-10-28 1996-08-15 Der Hoffmann Ag Geb Gebinde mit mindestens zwei getrennten Kammern.

Also Published As

Publication number Publication date
ATE176444T1 (de) 1999-02-15
DK0690011T3 (da) 1999-09-20
DE69416398D1 (de) 1999-03-18
DE69416398T2 (de) 1999-09-09
EP0690011A1 (de) 1996-01-03

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