EP0381627B1 - Two-chamber dispenser for a package under pressure or not - Google Patents

Two-chamber dispenser for a package under pressure or not Download PDF

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Publication number
EP0381627B1
EP0381627B1 EP90810066A EP90810066A EP0381627B1 EP 0381627 B1 EP0381627 B1 EP 0381627B1 EP 90810066 A EP90810066 A EP 90810066A EP 90810066 A EP90810066 A EP 90810066A EP 0381627 B1 EP0381627 B1 EP 0381627B1
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EP
European Patent Office
Prior art keywords
laminate
inner bag
bag
transition piece
chamber dispenser
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP90810066A
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German (de)
French (fr)
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EP0381627A1 (en
Inventor
Ferruccio Arzani
Sergio Bodega
Olivier Muggli
Jean Hardt
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.)
3A Composites International AG
Original Assignee
Alusuisse Lonza Services Ltd
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Publication date
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Priority to AT90810066T priority Critical patent/ATE100409T1/en
Publication of EP0381627A1 publication Critical patent/EP0381627A1/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00Containers or packages with special means for dispensing contents
    • B65D83/14Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/60Contents and propellant separated
    • B65D83/62Contents and propellant separated by membrane, bag, or the like
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/02Membranes or pistons acting on the contents inside the container, e.g. follower pistons
    • B05B11/026Membranes separating the content remaining in the container from the atmospheric air to compensate underpressure inside the container

Definitions

  • the invention relates to a two-chamber dispenser according to the preamble of patent claim 1.
  • a pressure-resistant can body contains a flexible, folded or a semi-rigid inner bag which is radially and / or axially deformable.
  • the pressure of the propellant between the inner bag and the can body is so great that the liquid, pasty or creamy filling material is expelled when the valve is opened.
  • nitrogen, air and liquefied methane are primarily used as propellants today, which are pressed or filled in, for example, through a closable hole in the bottom of the can body.
  • the contents When using a pump body, which for physical reasons is particularly suitable for liquids of low viscosity, the contents are sucked out of the inner bag. There is no overpressure in the space between the flexible inner bag and the can body. The contents withdrawn from the inner bag reduce the bag volume, the resulting negative pressure is constantly balanced.
  • FR-A-2371238 describes a two-chamber dispenser with an inner bag made of a laminate with a core layer made of aluminum and plastic layers, which bag has lamellae distributed over its entire circumference in the form of a crown for fastening it, including a sleeve and serve a ring pushed over it.
  • JP-A-62173239 shows a two-chamber dispenser with a rigid or semi-rigid one-piece can body which has a flared opening on one shoulder.
  • An inserted flexible inner bag with a neck consists of a laminate that forms a diffusion barrier. After filling, a valve or pump plate can be clipped onto the flange.
  • FR-A-2342222 shows a two-chamber container with a flexible inner bag, whose upper edge with a lid is part of the upper flange. According to GB-A-2162901, the upper edge of a flexible inner bag is also crimped.
  • the inventors have set themselves the task of creating a two-chamber dispenser of the type mentioned which, even in the transition area to a valve or a pump, is diffusion-tight for several years, even for tricky filling goods, and yet allows inexpensive production. Furthermore, this is of particular importance, the filling companies should be spared the insertion and fastening of the inner bag in the can body.
  • the bottling company no longer needs to carry out the relatively complex operation of inserting and fastening the inner bag into the can body; after filling the filling material, it only needs to chain the valve or pump plate and, if it is is a two-chamber pressure pack. This represents a significant simplification and thus a saving of investment and operating costs for a bottling plant.
  • the flexible inner bag of the two-chamber dispenser preferably consists of a one-piece, folded laminate strip which is cut or punched out and folded from a film web, or vice versa. Outside the bag opening for the contents, the cut or bent edges are sealed, glued or welded to form a seam several millimeters wide. On both sides of the opening for the filling, bevels are preferably formed, which appropriately correspond approximately to the shoulders of the can body.
  • the flexible inner bag preferably has a core layer made of aluminum or a ductile aluminum alloy.
  • a diffusion-blocking or -inhibiting plastic such as a polyamide, ethyl vinyl alcohol or polyvinyl dichloride, can also be used.
  • the core layer has a sealable plastic layer on at least one side, the inside. This can be sealed with itself or with other plastics.
  • the neck of the inner bag can basically be formed in two different ways, as an inserted transition piece or as a shaped collar, which is part of the multi-layer inner bag.
  • a transition piece which forms the neck and is made of an injection molded plastic, is glued, sealed or welded over the entire surface in the opening of the flexible inner bag.
  • the laminate forming the inner bag preferably extends to the connection of the transition piece with the flanging of the can body. This ensures that no or negligible diffusion of propellant gas through the plastic transition piece can take place, especially if compressed air, which contains aggressive oxygen, and delicate contents are only separated by the bag for years.
  • the transition piece is preferably made of polyethylene (PE) or polypropylene (PP).
  • PE polyethylene
  • PP polypropylene
  • the annular wall of the transition piece is expediently produced as a coextruded layer with diffusion barrier properties.
  • a separately or additionally applied metallized surface layer further improves the diffusion barrier properties of the transition piece.
  • the neck of the inner bag can be formed from a collar of the laminate; according to this variant, the transition piece or a shaped collar of the inner bag is tightly clamped in an inner flange of the can body.
  • the laminate fulfills all the required properties.
  • the laminate is flexible, available in the required sizes, chemically inert, phylically stable, can be deformed and glued, sealed or welded.
  • the two-chamber dispenser according to the invention as a whole can be produced at modest costs. Any standardized valve or pump plate can be flanged with the dispenser be clinched.
  • the laminate 10 shown in FIG. 1 for producing an inner bag has an approximately 9-30 ⁇ m thick core layer 12 made of pure aluminum, which is coated on both sides with a primer 14.
  • An outer layer 16, which is fastened by means of an adhesive 18, is arranged on the upper side, the later outer side of the bag.
  • the later inner layer 20 is fastened on the underside, likewise by means of an adhesive 18.
  • the outer layer 16 made of polyethylene terephthalate (PET) is about 12-30 ⁇ m
  • the inner layer 20 made of polyethylene (PE) is about 30-50 ⁇ m thick.
  • the total thickness of the laminate is approximately 70-120 ⁇ m.
  • a further plastic layer can be arranged between the adhesive 18 and the inner layer 20, which e.g. corresponds to the outer layer 16 and improves the kink resistance.
  • the inner bag 22 shown in FIG. 2 is cut out or punched out of a film web of a laminate 10 according to FIG. 1.
  • the cut or punched edges 24 of the laminate 10 folded over along the three bending edges 26, with the exception of the bag opening 30 and along the bending edge 27, are connected to one another via sealing seams 28.
  • sealing seams 28 For the sake of simplicity, here and in the following, glued or welded seams are also referred to as sealing seams 28.
  • the area of the inner bag 22 opposite the bag opening 30 is folded and sealed in a manner known per se so that the bottom can expand when the filling material is added.
  • the seal in this area is indicated by the section shown in FIG. 2a along the line IIa - IIa in FIG. 2.
  • the laminate 10 is folded three times along the bending edges 26, 27 and connected to one another by forming sealing seams 28, 29. Outside the area of the sealing seams 28 running in the longitudinal direction L of the inner bag 22, the fold shown in FIG.
  • the sealing seam 28 is cut off or punched out with a bevel 44.
  • the bevel 32 is preferably adapted approximately to the shape and inclination of the shoulder of the can body.
  • the laminate 10 is glued over the entire surface to the cylinder jacket of the transition piece 34, the sealing seams 28 of the inner bag 22 being approximately protrude radially.
  • the removal of the uppermost region of the sealing seam 28 indicated in FIG. 2 enables the laminate 10 to be pulled up far enough.
  • the raised laminate which is highly effective against diffusion, means that the propellant gas 40 between the can body 38 and the filling material 42 arranged in the inner bag 22 cannot diffuse through the transition piece 34 even in the area below the outer flange 36 and can have a damaging effect on the filling material 42.
  • the height h drawn below the opening 30 with the sealing seam 28 of the inner bag 22 removed is kept as low as possible, in practice it is 1-5, preferably 1-2 mm.
  • the bevel 44 of the seal 28 is selected so that the height h can be kept low with all the usual shoulder shapes and inclinations of the can body 38.
  • the transition piece 34 is shaped in the upper edge area 46 so that it can be placed over the outer flange 36 and glued to it.
  • the injection mold for the transition piece 34 is further designed such that an annular sealing bead 48 is formed, which is useful for tightly locking a valve or pump plate.
  • FIG. 4 shows the annular transition piece 34 and the two-part laminate 10 of the inner bag 22 sealed thereon
  • the two laminates 10 are glued to one another approximately radially projecting sealing seam 28.
  • the laminate 10 is applied in a manner known per se with heated clamping jaws or sealing jaws and a silicone rubber stamp, which acts as a quasi-hydraulic medium and is introduced into the interior of the transition piece 34. Furthermore, the laminate can be shrunk onto the transition piece 34 in a manner known per se.
  • FIG. 6 A variant of FIG. 3 is shown in FIG. 6.
  • the laminate 10 is in turn pulled up over a transition piece 34, which has a circumferential shape 52, to the outer flange 36 and is deformed like the transition piece 34.
  • the bag opening 30, which indicates the position of the laminate 10, is shown in dashed lines.
  • the can opening is linked to a valve or pump plate 54.
  • a seal 58 is arranged between the upper edge region 46 of the transition piece 34 which is bent outwards and the correspondingly bent part 56 of the valve or pump plate 54.
  • Fig. 7 shows a variant for the production of the inner bag 22.
  • the laminate 10 punched out of a film web with the cut or punched edges 24 determines the outer contours of the inner bag 22.
  • the wedge-shaped recesses in the line A - A form the cut or punched edges 24 after gluing, sealing or welding Sealing seams 28 the bevels 32.
  • the center of the bag opening 30 lies on the line A - A, the folded edge which arises when the laminate 10 is folded in half.
  • a bag opening 30 with a collar 60 forming the neck of the inner bag 22 is created by stretching, cup-drawing and final punching. This is indicated in the cut-away partial view according to FIG. 7a.
  • the collar 60 formed During normal folding of the laminate 10 along the line AA, the collar 60 formed would be weakened. When folding, therefore, a gauge protecting the collar 60 is used.
  • the collar 60 can be fastened directly in the flanging of the can body 38.
  • the collar 60 can, however, also be shrunk onto a transition piece 34 (FIGS. 3, 6), which in turn is fastened on or in the flare.
  • FIG. 8 shows an inner bag 22 without a transition piece 34 (FIGS. 3, 6), which is fastened in an inner flange 62 of a can body 38.
  • the sealing seam 28 is folded over in the region of the bag opening 30.
  • a rolled edge 64 has a clamping effect on the laminate 10 with the folded sealing edge 66.
  • a seal 68 is arranged between the can body 38 and the folded sealing edge 66.
  • This can be a tubular seal, a sealing compound or a tubular, thermoplastic ring welded after assembly by the action of the joining parts.
  • the propellant gas 40 is pressed into the inner bag 22 through a hole in the bottom of the can body 38.
  • the bore of the now under pressure Can body 38 is closed with a special stopper 70.
  • a transition piece 34 (FIGS. 3, 6) can also be fastened in the inner flange 62.
  • a bottling company receives from the can manufacturer the two-chamber dispenser, which comprises a can body with an inserted, attached inner bag (FIGS. 3, 6, 8).
  • the filling material can be added without further preparatory work for the bottler.
  • the bottler then clips a valve or pump plate 54 onto it. If it is a two-chamber pressure pack, the can body is gassed and sealed.
  • the embodiment of the two-chamber dispenser according to the invention ensures years of diffusion-free storage of the two-chamber compressed gas or unpressurized pack.

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  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The two-chamber dispenser comprises a rigid or semi-rigid one piece can body with a shoulder forming a flanged opening and a flexible pouch which is inserted inside and is made of a material for providing a diffusion barrier. The dispenser is for liquid, pasty or creamy contents. The pouch is made of a laminate and features a neck in the region of the flange. The flange is suitable for clinching on a valve or pump plate after filling.

Description

Die Erfindung bezieht sich auf einen Zweikammer-Dispenser nach dem Oberbegriff von Patentanspruch 1.The invention relates to a two-chamber dispenser according to the preamble of patent claim 1.

Es sind verschiedene Zweikammer-Dispenser für Druckgas- und drucklose Packungen bekannt, welche die Trennung eines Treibmittels vom Füllgut erlauben.Various two-chamber dispensers for pressurized gas and unpressurized packs are known, which allow a propellant to be separated from the filling material.

Bei einer Zweikammer-Druckpackung enthält ein druckbeständiger Dosenkörper einen flexiblen, gefalteten oder einen halbstarren Innenbeutel, welcher radial und/oder axial deformierbar ist. Der Druck des Treibmittels zwischen dem Innenbeutel und dem Dosenkörper ist so gross, dass das flüssige, pastöse oder cremige Füllgut beim Oeffnen des Ventils ausgetrieben wird. Aus Umweltschutzgründen werden heute als Treibgase in erster Linie Stickstoff, Luft und verflüssigtes Methan verwendet, welche beispielsweise durch ein verschliessbares Loch im Boden des Dosenkörpers eingepresst bzw. eingefüllt werden.In a two-chamber pressure pack, a pressure-resistant can body contains a flexible, folded or a semi-rigid inner bag which is radially and / or axially deformable. The pressure of the propellant between the inner bag and the can body is so great that the liquid, pasty or creamy filling material is expelled when the valve is opened. For environmental reasons, nitrogen, air and liquefied methane are primarily used as propellants today, which are pressed or filled in, for example, through a closable hole in the bottom of the can body.

Bei Verwendung eines Pumpenkörpers, welcher aus physikalischen Gründen insbesondere für Flüssigkeiten niedriger Viskosität geeignet ist, wird das Füllgut aus dem Innenbeutel abgesaugt. Im Raum zwischen dem flexiblen Innenbeutel und dem Dosenkörper besteht kein Ueberdruck. Das dem Innenbeutel entzogene Füllgut lässt das Beutelvolumen geringer werden, der dabei entstehende Unterdruck wird laufend ausgeglichen.When using a pump body, which for physical reasons is particularly suitable for liquids of low viscosity, the contents are sucked out of the inner bag. There is no overpressure in the space between the flexible inner bag and the can body. The contents withdrawn from the inner bag reduce the bag volume, the resulting negative pressure is constantly balanced.

In der FR-A-2371238 wird ein Zweikammer-Dispenser mit einem Innenbeutel aus einem Laminat mit einer Kernschicht aus Aluminium und Kunststoffschichten beschrieben, welcher Beutel an seinem Hals über den ganzen Umfang in Form einer Krone verteilte Lamellen zu dessen Befestigung aufweist, wozu eine Hülse und ein darübergeschobener Ring dienen.FR-A-2371238 describes a two-chamber dispenser with an inner bag made of a laminate with a core layer made of aluminum and plastic layers, which bag has lamellae distributed over its entire circumference in the form of a crown for fastening it, including a sleeve and serve a ring pushed over it.

Die JP-A-62173239 zeigt einen Zweikammer-Dispenser mit einem starren oder halbstarren einteiligen Dosenkörper, welcher an einer Schulter eine gebördelte Oeffnung aufweist.JP-A-62173239 shows a two-chamber dispenser with a rigid or semi-rigid one-piece can body which has a flared opening on one shoulder.

Ein eingesetzter flexibler Innenbeutel mit Hals besteht aus einem eine Diffusionsbarriere bildenden Laminat. Nach dem Abfüllen kann ein Ventil- oder Pumpenteller mit der Bördelung verclincht werden.An inserted flexible inner bag with a neck consists of a laminate that forms a diffusion barrier. After filling, a valve or pump plate can be clipped onto the flange.

Aus der WO-A-88/10221 ist ein Innenbeutel mit einer zwischen zwei Kunststoffolien liegenden Aluminiumfolie bekannt. Mit einer Aluminiumfoliendicke von 0,012 mm kann eine Diffusion von Duftstoffen oder Luftsauerstoff im Zweikammerbehälter vermieden werden. Mehrschichtige Behälter an sich mit einer Kernschicht aus Aluminium, einer Innenschicht aus Polypropylen oder Polyäthylen und einer Aussenschicht aus Polyäthylenterephtalat oder Polypropylen sind aus der JP-A-59078672 bekannt. Weitere Details der Ausgestaltung eines Innenbeutels eines Zweikammerbehälters ergeben sich aus der EP-A-0105537, welche einen gefalteten Folien- oder Laminatbeutel zeigt, der aus im wesentlichen rechteckigen, beidseitig kunststoffkaschierten Metallfolien besteht.From WO-A-88/10221 an inner bag with an aluminum foil lying between two plastic films is known. Diffusion of fragrances or atmospheric oxygen in the two-chamber container can be avoided with an aluminum foil thickness of 0.012 mm. Multilayer containers per se with a core layer made of aluminum, an inner layer made of polypropylene or polyethylene and an outer layer made of polyethylene terephthalate or polypropylene are known from JP-A-59078672. Further details of the design of an inner bag of a two-chamber container can be found in EP-A-0105537, which shows a folded film or laminate bag which consists of essentially rectangular metal films laminated on both sides.

Die FR-A-2342222 schliesslich zeigt einen Zweikammerbehälter mit einem flexiblen Innenbeutel, wessen oberer Rand mit einem Deckel Bestandteil der oberen Bördelung ist. Auch nach der GB-A-2162901 wird der obere Rand eines flexiblen Innenbeutels eingebördelt.Finally, FR-A-2342222 shows a two-chamber container with a flexible inner bag, whose upper edge with a lid is part of the upper flange. According to GB-A-2162901, the upper edge of a flexible inner bag is also crimped.

Alle bekannten Ausführungsformen von Zweikammer-Dispensern für Druckgas- und drucklose Packungen weisen wenigstens einen der folgenden Nachteile auf:

  • Der Diffusionswiderstand ist nicht ausreichend, sei es, weil das verwendete Material keine ausreichende Sperre bildet oder weil die Verbindung vom Innenbeutel zum Ventil- oder Pumpenkörper nicht genügend dicht ist.
  • Das zur Erzeugung einer absolut dichten Diffusionsbarriere notwendige Material, z.B. in Form einer Aluminiumhülse, ist zu dick. Beim radialen Zusammendrücken entsteht ein grosses Restvolumen, was bezüglich des Füllgutes Materialverluste zur Folge hat. Eine axiale Stauchung kann hier nicht erfolgen. Weiter entstehen bei der radialen Deformierung Knicke und dadurch bedingt Spannungen, die zu Durchbrüchen führen können (GB-A-2162901).
  • Die Innenbeutel sind auf komplizierte Weise befestigt, z.B. in zweiteiligen Dosenkörpern.
  • Bekannte Zweikammer-Dispenser sind ausgesprochen teuer und das Endprodukt daher schwer verkäuflich.
All known embodiments of two-chamber dispensers for pressurized gas and pressureless packs have at least one of the following disadvantages:
  • The diffusion resistance is not sufficient, either because the material used does not form an adequate barrier or because the connection from the inner bag to the valve or pump body is not sufficiently tight.
  • The material required to create an absolutely tight diffusion barrier, for example in the form of an aluminum sleeve, is too thick. Radial compression creates a large residual volume, which results in material losses with regard to the filling material. An axial compression cannot take place here. Furthermore, the radial deformation causes kinks and, as a result, stresses that can lead to breakthroughs (GB-A-2162901).
  • The inner bags are attached in a complicated manner, for example in two-part can bodies.
  • Known two-chamber dispensers are extremely expensive and the end product is therefore difficult to sell.

Die Erfinder haben sich die Aufgabe gestellt, einen Zweikammer-Dispenser der eingangs genannten Art zu schaffen, welcher auch im Uebergangsbereich zu einem Ventil oder einer Pumpe, selbst für heikle Füllgüter, während mehrerer Jahre diffusionsdicht ist und dennoch eine kostengünstige Herstellung erlaubt. Weiter soll, dies ist von besonderer Wichtigkeit, den Abfüllbetrieben das Einführen und Befestigen des Innenbeutels im Dosenkörper erspart werden.The inventors have set themselves the task of creating a two-chamber dispenser of the type mentioned which, even in the transition area to a valve or a pump, is diffusion-tight for several years, even for tricky filling goods, and yet allows inexpensive production. Furthermore, this is of particular importance, the filling companies should be spared the insertion and fastening of the inner bag in the can body.

Die Aufgabe wird erfindungsgemäss nach dem Kennzeichen von Patentanspruch 1 gelöst.The object is achieved according to the characterizing part of claim 1.

Dank des erfindungsgemässen Zweikammer-Dispensers braucht also der Abfüllbetrieb die verhältnismässig aufwendige Operation des Einführens und Befestigens des Innenbeutels in den Dosenkörper nicht mehr selbst auszuführen, er braucht nach dem Einfüllen des Füllguts nur noch den Ventil- bzw. Pumpenteller zu verclinchen und, falls es sich um eine Zweikammer-Druckpackung handelt, zu begasen. Dies stellt eine wesentliche Vereinfachung und damit Ersparnis von Investitions- und Betriebskosten für einen Abfüllbetrieb dar.Thanks to the two-chamber dispenser according to the invention, the bottling company no longer needs to carry out the relatively complex operation of inserting and fastening the inner bag into the can body; after filling the filling material, it only needs to chain the valve or pump plate and, if it is is a two-chamber pressure pack. This represents a significant simplification and thus a saving of investment and operating costs for a bottling plant.

Der flexible Innenbeutel des Zweikammer-Dispensers besteht vorzugsweise aus einem einstückigen, gefalteten Laminatstreifen, der aus einer Folienbahn ausgeschnitten bzw. ausgestanzt und gefaltet, oder umgekehrt, ist. Ausserhalb der Beutelöffnung für das Füllgut sind die Schnitt- bzw. Biegekanten unter Bildung einer mehrere Millimeter breiten Naht versiegelt, verklebt oder verschweisst. Beidseits der Oeffnung für das Füllgut sind vorzugsweise Abschrägungen ausgebildet, welche zweckmässig etwa den Schultern des Dosenkörpers entsprechen.The flexible inner bag of the two-chamber dispenser preferably consists of a one-piece, folded laminate strip which is cut or punched out and folded from a film web, or vice versa. Outside the bag opening for the contents, the cut or bent edges are sealed, glued or welded to form a seam several millimeters wide. On both sides of the opening for the filling, bevels are preferably formed, which appropriately correspond approximately to the shoulders of the can body.

Der flexible Innenbeutel weist vorzugsweise eine Kernschicht aus Aluminium bzw. einer duktilen Aluminiumlegierung auf. Anstelle der metallischen Kernschicht kann auch ein diffusionssperrender oder -hemmender Kunststoff, wie ein Polyamid, Aethyl-Vinylalkohol oder Polyvinyldichlorid treten. Auf wenigstens einer Seite, der Innenseite, weist die Kernschicht eine siegelfähige Kunststoffschicht auf. Diese kann mit sich selbst oder mit andern Kunststoffen versiegelt werden. Der Hals des Innenbeutels kann grundsätzlich auf zwei verschiedene Arten ausgebildet sein, als eingesetztes Uebergangsstück oder als ausgeformter Kragen, welcher Bestandteil des mehrschichtigen Innenbeutels ist.The flexible inner bag preferably has a core layer made of aluminum or a ductile aluminum alloy. Instead of the metallic core layer, a diffusion-blocking or -inhibiting plastic, such as a polyamide, ethyl vinyl alcohol or polyvinyl dichloride, can also be used. The core layer has a sealable plastic layer on at least one side, the inside. This can be sealed with itself or with other plastics. The neck of the inner bag can basically be formed in two different ways, as an inserted transition piece or as a shaped collar, which is part of the multi-layer inner bag.

Nach der ersten Variante wird in der Oeffnung des flexiblen Innenbeutels ein den Hals bildendes Uebergangsstück aus einem gespritzten Kunststoff vollflächig eingeklebt, eingesiegelt oder eingeschweisst. Das den Innenbeutel bildende Laminat reicht bevorzugt bis zur Verbindung des Uebergangsstücks mit der Bördelung des Dosenkörpers. Damit ist gewährleistet, dass keine oder eine vernachlässigbar geringe Diffusion von Treibgas durch das Uebergangsstück aus Kunststoff erfolgen kann, insbesondere wenn Pressluft, welche aggressiven Sauerstoff enthält, und heikles Füllgut jahrelang nur durch den Beutel getrennt sind.According to the first variant, a transition piece, which forms the neck and is made of an injection molded plastic, is glued, sealed or welded over the entire surface in the opening of the flexible inner bag. The laminate forming the inner bag preferably extends to the connection of the transition piece with the flanging of the can body. This ensures that no or negligible diffusion of propellant gas through the plastic transition piece can take place, especially if compressed air, which contains aggressive oxygen, and delicate contents are only separated by the bag for years.

Das Uebergangsstück besteht vorzugsweise aus Polyäthylen (PE) oder Polypropylen (PP). Zweckmässig wird die ringförmige Wandung des Uebergangsstücks als coextrudierte Schicht mit Diffusionssperreigenschaften hergestellt. Eine separat oder zusätzlich aufgebrachte metallisierte Oberflächenschicht verbessert die Diffusionssperreigenschaften des Uebergangsstücks weiter.The transition piece is preferably made of polyethylene (PE) or polypropylene (PP). The annular wall of the transition piece is expediently produced as a coextruded layer with diffusion barrier properties. A separately or additionally applied metallized surface layer further improves the diffusion barrier properties of the transition piece.

Nach einer zweiten Variante kann der Hals des Innenbeutels aus einem Kragen des Laminats geformt sein, nach dieser Variante wird das Uebergangsstück oder ein ausgeformter Kragen des Innenbeutels in einer Innenbördelung des Dosenkörpers dichtend festgeklemmt.According to a second variant, the neck of the inner bag can be formed from a collar of the laminate; according to this variant, the transition piece or a shaped collar of the inner bag is tightly clamped in an inner flange of the can body.

Das Laminat erfüllt als Innenbeutel für einen Dosenkörper, mit einem Uebergangsstück oder mit dem ausgeformten Laminat direkt befestigt, alle erforderlichen Eigenschaften. Das Laminat ist flexibel, in den erforderlichen Grössen verfügbar, chemisch inert, phylikalisch stabil, kann verformt und verklebt, versiegelt oder verschweisst werden. Der erfindungsgemässe Zweikammer-Dispenser als ganzes ist mit bescheidenen Kosten herstellbar. Jeder standardisierte Ventil- oder Pumpenteller kann mit der Bördelung des Dispensers verclincht werden.As an inner bag for a can body, with a transition piece or directly attached to the molded laminate, the laminate fulfills all the required properties. The laminate is flexible, available in the required sizes, chemically inert, phylically stable, can be deformed and glued, sealed or welded. The two-chamber dispenser according to the invention as a whole can be produced at modest costs. Any standardized valve or pump plate can be flanged with the dispenser be clinched.

Die Erfindung wird anhand der in der Zeichnung dargestellten Ausführungsbeispiele näher erläutert. Es zeigen schematisch:

  • Fig. 1 einen Teilschnitt durch ein Laminat eines Innenbeutels,
  • Fig. 2 eine Ansicht eines Innenbeutels aus einem Laminat gemäss Fig. 1,
  • Fig. 2a einen Schnitt IIa - IIa durch den gefalteten Bereich des Innenbeutels gemäss Fig. 2,
  • Fig. 3 eine aufgeschnittene Teilansicht eines Zweikammer-Dispensers mit eingesetztem Innenbeutel,
  • Fig. 4 einen Horizontalschnitt gemäss Linie IV - IV in Fig. 3,
  • Fig. 5 einen Horizontalschnitt gemäss Linie V - V in Fig. 3,
  • Fig. 6 eine aufgeschnittene Teilansicht einer Variante eines Zweikammer-Dispensers mit eingesetztem Innenbeutel,
  • Fig. 7 ein ausgestanztes Laminat mit einer Oeffnung im Bereich der Mittelfaltung,
  • Fig. 7a eine Teilansicht von Fig. 7, und
  • Fig. 8 eine aufgeschnittene Teilansicht eines Zweikammer-Dispensers mit von einer Innenbördelung gehaltertem Innenbeutel.
The invention is explained in more detail using the exemplary embodiments shown in the drawing. They show schematically:
  • 1 is a partial section through a laminate of an inner bag,
  • 2 is a view of an inner bag made of a laminate according to FIG. 1,
  • 2a shows a section IIa - IIa through the folded area of the inner bag according to FIG. 2,
  • 3 shows a cutaway partial view of a two-chamber dispenser with an inserted inner bag,
  • 4 shows a horizontal section along line IV-IV in FIG. 3,
  • 5 shows a horizontal section along line V - V in FIG. 3,
  • 6 shows a cutaway partial view of a variant of a two-chamber dispenser with an inserted inner bag,
  • 7 shows a punched-out laminate with an opening in the area of the middle fold,
  • Fig. 7a is a partial view of Fig. 7, and
  • Fig. 8 is a cutaway partial view of a two-chamber dispenser with an inner bag held by an inner flange.

Das in Fig. 1 dargestellte Laminat 10 zur Herstellung eines Innenbeutels hat eine etwa 9 - 30 µm dicke Kernschicht 12 aus Reinaluminium, welche beidseits mit einem Primer 14 lackiert ist. Auf der oberen Seite, der späteren Beutelaussenseite, ist eine Aussenschicht 16 angeordnet, welche mittels eines Klebers 18 befestigt ist. Auf der Unterseite ist, ebenfalls mittels eines Klebers 18, die spätere Innenschicht 20 befestigt. Die Aussenschicht 16 aus Polyäthylenterephtalat (PET) ist etwa 12 - 30 µm, die Innenschicht 20 aus Polyäthlen (PE) etwa 30 - 50 µm dick. Die Gesamtdicke des Laminats beträgt etwa 70 - 120 µm.The laminate 10 shown in FIG. 1 for producing an inner bag has an approximately 9-30 μm thick core layer 12 made of pure aluminum, which is coated on both sides with a primer 14. An outer layer 16, which is fastened by means of an adhesive 18, is arranged on the upper side, the later outer side of the bag. The later inner layer 20 is fastened on the underside, likewise by means of an adhesive 18. The outer layer 16 made of polyethylene terephthalate (PET) is about 12-30 µm, the inner layer 20 made of polyethylene (PE) is about 30-50 µm thick. The total thickness of the laminate is approximately 70-120 µm.

Nach einer nicht dargestellten Ausführungsform des Laminats 10 kann zwischen dem Kleber 18 und der Innenschicht 20 eine weitere Kunststoffschicht angeordnet sein, welche z.B. der Aussenschicht 16 entspricht und die Knickbeständigkeit verbessert.According to an embodiment of the laminate 10, not shown, a further plastic layer can be arranged between the adhesive 18 and the inner layer 20, which e.g. corresponds to the outer layer 16 and improves the kink resistance.

Der in Fig. 2 dargestellte Innenbeutel 22 ist aus einer Folienbahn eines Laminats 10 gemäss Fig. 1 ausgeschnitten bzw. ausgestanzt. Die Schnitt- bzw. Stanzkanten 24 des entlang der drei Biegekanten 26 umgefalteten Laminats 10 sind, mit Ausnahme der Beutelöffnung 30 und entlang der Biegekante 27, über Siegelnähte 28 miteinander verbunden. Einfachheitshalber werden hier und im folgenden auch geklebte oder verschweisste Nähte als Siegelnähte 28 bezeichnet.The inner bag 22 shown in FIG. 2 is cut out or punched out of a film web of a laminate 10 according to FIG. 1. The cut or punched edges 24 of the laminate 10 folded over along the three bending edges 26, with the exception of the bag opening 30 and along the bending edge 27, are connected to one another via sealing seams 28. For the sake of simplicity, here and in the following, glued or welded seams are also referred to as sealing seams 28.

Der der Beutelöffnung 30 gegenüberliegende Bereich des Innenbeutels 22 ist in an sich bekannter Weise so gefaltet und versiegelt, dass sich der Boden bei der Zugabe des Füllgutes ausweiten kann. Die Versiegelung in diesem Bereich ist durch den in Fig. 2a dargestellten Schnitt entlang der Linie IIa - IIa in Fig. 2 angedeutet. Das Laminat 10 ist dreimal entlang der Biegekanten 26, 27 gefaltet und durch Ausbildung von Siegelnähten 28, 29 miteinander verbunden. Ausserhalb des Bereichs der in Längsrichtung L des Innenbeutels 22 verlaufenden Siegelnähte 28 wird die in Fig. 2a dargestellte Faltung bei der Zugabe von Füllgut auseinandergespreizt, weil von den unteren drei Siegelnähten 29 die mittlere fehlt und die äusseren nur im untersten Bereich ausgebildet sind.The area of the inner bag 22 opposite the bag opening 30 is folded and sealed in a manner known per se so that the bottom can expand when the filling material is added. The seal in this area is indicated by the section shown in FIG. 2a along the line IIa - IIa in FIG. 2. The laminate 10 is folded three times along the bending edges 26, 27 and connected to one another by forming sealing seams 28, 29. Outside the area of the sealing seams 28 running in the longitudinal direction L of the inner bag 22, the fold shown in FIG.

Im Bereich der Beutelöffnung ist die Siegelnaht 28, wie auf einer Seite mit einer punktierten Linie angedeutet, mit einer Abschrägung 44 abgeschnitten oder ausgestanzt.In the area of the bag opening, the sealing seam 28, as indicated on one side with a dotted line, is cut off or punched out with a bevel 44.

Die Abschrägung 32 ist vorzugsweise etwa der Form und Neigung der Schulter des Dosenkörpers angepasst.The bevel 32 is preferably adapted approximately to the shape and inclination of the shoulder of the can body.

Das gemäss Fig. 3 auf ein Uebergangsstück 34, ein gespritztes Formteil aus Kunststoff, aufgebrachte Laminat 10 erstreckt sich bis zur Aussenbördelung 36 des Dosenkörpers 38. Das Laminat 10 ist vollflächig mit dem Zylindermantel des Uebergangsstücks 34 verklebt, wobei die Siegelnähte 28 des Innenbeutels 22 etwa radial abstehen. Das in Fig. 2 angedeutete Entfernen des obersten Bereichs der Siegelnaht 28 ermöglicht, das Laminat 10 genügend weit hochzuziehen. Das hochgezogene, gegen Diffusion hochwirksame Laminat bewirkt, dass das Treibgas 40 zwischen dem Dosenkörper 38 und dem im Innenbeutel 22 angeordneten Füllgut 42 auch im Bereich unterhalb der Aussenbördelung 36 nicht durch das Uebergangsstück 34 diffundieren und schädigend auf das Füll gut 42 einwirken kann.The laminate 10 applied to a transition piece 34, an injection-molded molded part made of plastic, extends as far as the outer flange 36 of the can body 38. The laminate 10 is glued over the entire surface to the cylinder jacket of the transition piece 34, the sealing seams 28 of the inner bag 22 being approximately protrude radially. The removal of the uppermost region of the sealing seam 28 indicated in FIG. 2 enables the laminate 10 to be pulled up far enough. The raised laminate, which is highly effective against diffusion, means that the propellant gas 40 between the can body 38 and the filling material 42 arranged in the inner bag 22 cannot diffuse through the transition piece 34 even in the area below the outer flange 36 and can have a damaging effect on the filling material 42.

Die unterhalb der Oeffnung 30 gezeichnete Höhe h mit entfernter Siegelnaht 28 des Innenbeutels 22 wird möglichst gering gehalten, sie beträgt in der Praxis 1 - 5, vorzugsweise 1 - 2 mm. In Uebereinstimmung damit wird die Abschrägung 44 der Siegel naht 28 so gewählt, dass die Höhe h bei allen üblichen Schulterformen und -neigungen des Dosenkörpers 38 gering gehalten werden kann.The height h drawn below the opening 30 with the sealing seam 28 of the inner bag 22 removed is kept as low as possible, in practice it is 1-5, preferably 1-2 mm. In accordance with this, the bevel 44 of the seal 28 is selected so that the height h can be kept low with all the usual shoulder shapes and inclinations of the can body 38.

Das Uebergangsstück 34 ist im oberen Randbereich 46 so geformt, dass es über die Aussenbördelung 36 gelegt und mit dieser verklebt werden kann. Die Spritzform für das Uebergangsstück 34 ist weiter so ausgebildet, dass ein ringförmiger Dichtungswulst 48 ausgebildet ist, welcher dem dichten Verclinchen eines Ventil- oder Pumpentellers dienlich ist.The transition piece 34 is shaped in the upper edge area 46 so that it can be placed over the outer flange 36 and glued to it. The injection mold for the transition piece 34 is further designed such that an annular sealing bead 48 is formed, which is useful for tightly locking a valve or pump plate.

Der in Fig. 4 dargestellte Horizontalschnitt zeigt das ringförmige Uebergangsstück 34 und das darauf gesiegelte zweiteilige Laminat 10 des Innenbeutels 22. Im Bereich der etwa radial abstehenden Siegelnaht 28 sind die beiden Laminate 10 miteinander verklebt.The horizontal section shown in FIG. 4 shows the annular transition piece 34 and the two-part laminate 10 of the inner bag 22 sealed thereon The two laminates 10 are glued to one another approximately radially projecting sealing seam 28.

Das Aufbringen des Laminats 10 erfolgt in an sich bekannter Weise mit geheizten Klemmbacken bzw. Siegelbacken und einem in den Innenraum des Uebergangsstücks 34 eingeführten, als quasi-hydraulisches Medium wirkenden Silikongummistempel. Weiter kann das Laminat, in ebenfalls an sich bekannter Weise, auf das Uebergangsstück 34 aufgeschrumpft werden.The laminate 10 is applied in a manner known per se with heated clamping jaws or sealing jaws and a silicone rubber stamp, which acts as a quasi-hydraulic medium and is introduced into the interior of the transition piece 34. Furthermore, the laminate can be shrunk onto the transition piece 34 in a manner known per se.

Im Horizontalschnitt gemäss Fig. 5 ist die Siegelnaht 28 (Fig. 3) entfernt. Dadurch bildet sich zwischen den beiden Hälften des Laminats 10 ein Stossbereich 50, in welchem das Laminat 10 nicht vollständig dicht schliesst. Obwohl dies eine Schwachstelle ist, ist die Schutzwirkung des Laminats im ganzen gesehen und verglichen mit bekannten Ausführungsformen ausserordentlich hoch. Der sonst ringförmige ungeschützte Bereich des Uebergangsstücks hat sich nach der Erfindung auf zwei schmale Mantellinien reduziert, was die Diffusion von zwischen dem Dosenkörper 38 und dem Uebergangsstück 34 angeordnetem Treibgas 40 zum Füllgut 42 praktisch vernachlässigbar macht.5, the sealing seam 28 (FIG. 3) has been removed. As a result, a butt region 50 is formed between the two halves of the laminate 10, in which the laminate 10 does not close completely tightly. Although this is a weak point, the overall protective effect of the laminate is extremely high compared to known embodiments. The otherwise annular unprotected area of the transition piece has been reduced to two narrow surface lines according to the invention, which makes the diffusion of propellant gas 40 arranged between the can body 38 and the transition piece 34 to the filling material 42 practically negligible.

In Fig. 6 wird eine Variante von Fig. 3 gezeigt. Das Laminat 10 ist wiederum über ein Uebergangsstück 34, welches eine umlaufende Ausformung 52 aufweist, bis zur Aussenbördelung 36 hochgezogen und ist wie das Uebergangsstück 34 verformt. Die Beutelöffnung 30, welche die Lage des Laminats 10 anzeigt, ist gestrichelt eingezeichnet.A variant of FIG. 3 is shown in FIG. 6. The laminate 10 is in turn pulled up over a transition piece 34, which has a circumferential shape 52, to the outer flange 36 and is deformed like the transition piece 34. The bag opening 30, which indicates the position of the laminate 10, is shown in dashed lines.

Die Dosenöffnung ist mit einem Ventil- oder Pumpenteller 54 verclincht. Zwischem dem nach aussen abgebogenen oberen Randbereich 46 des Uebergangsstücks 34 und dem entsprechend abgebogenen Teil 56 des Ventil- oder Pumpentellers 54 ist eine Dichtung 58 angeordnet.The can opening is linked to a valve or pump plate 54. A seal 58 is arranged between the upper edge region 46 of the transition piece 34 which is bent outwards and the correspondingly bent part 56 of the valve or pump plate 54.

Fig. 7 zeigt eine Variante zur Herstellung des Innenbeutels 22. Das aus einer Folienbahn ausgestanzte Laminat 10 mit den Schnitt- bzw. Stanzkanten 24 bestimmt die äusseren Konturen des Innenbeutels 22. Die keilförmigen Aussparungen bei der Linie A - A bilden nach dem Verkleben, Versiegeln oder Verschweissen der Schnitt- bzw. Stanzkanten 24 zu Siegelnähten 28 die Abschrägungen 32.Fig. 7 shows a variant for the production of the inner bag 22. The laminate 10 punched out of a film web with the cut or punched edges 24 determines the outer contours of the inner bag 22. The wedge-shaped recesses in the line A - A form the cut or punched edges 24 after gluing, sealing or welding Sealing seams 28 the bevels 32.

Das Zentrum der Beutelöffnung 30 liegt auf der Linie A - A, der Faltkante, welche beim halbierenden Umlegen des Laminats 10 entsteht. Durch Streckziehen, Napfziehen und abschliessendes Stanzen entsteht eine Beutelöffnung 30 mit einem den Hals des Innenbeutels 22 bildenden Kragen 60. Dieser ist in der aufgeschnittenen Teilansicht gemäss Fig. 7a angedeutet.The center of the bag opening 30 lies on the line A - A, the folded edge which arises when the laminate 10 is folded in half. A bag opening 30 with a collar 60 forming the neck of the inner bag 22 is created by stretching, cup-drawing and final punching. This is indicated in the cut-away partial view according to FIG. 7a.

Beim normalen Falten des Laminats 10 entlang der Linie A - A würde der gebildete Kragen 60 geschwächt. Beim Falten wird deshalb eine den Kragen 60 schützende Lehre verwendet.During normal folding of the laminate 10 along the line AA, the collar 60 formed would be weakened. When folding, therefore, a gauge protecting the collar 60 is used.

Der Kragen 60 kann direkt in der Bördelung des Dosenkörpers 38 befestigt werden. Der Kragen 60 kann jedoch auch auf ein Uebergangsstück 34 (Fig. 3, 6) geschrumpft werden, welches seinerseits auf bzw. in der Bördelung befestigt wird.The collar 60 can be fastened directly in the flanging of the can body 38. The collar 60 can, however, also be shrunk onto a transition piece 34 (FIGS. 3, 6), which in turn is fastened on or in the flare.

Fig. 8 zeigt einen Innenbeutel 22 ohne Uebergangsstück 34 (Fig. 3, 6), welcher in einer Innenbördelung 62 eines Dosenkörpers 38 befestigt ist. Im Bereich der Beutelöffnung 30 ist die Siegelnaht 28 umgelegt. Ein Rollrand 64 entfaltet eine Klemmwirkung auf das Laminat 10 mit dem umgelegten Siegelrand 66. Zwischen dem Dosenkörper 38 und dem umgelegten Siegelrand 66 ist eine Dichtung 68 angeordnet. Diese kann eine schlauchartige Dichtung, eine Dichtungsmasse oder ein rohrförmiger, thermoplastischer, nach der Montage durch Einwirkung der Fügeteile geschweisster Ring sein. Das Treibgas 40 wird nach der Zugabe des Füllgutes in den Innenbeutel 22 durch eine Bohrung im Boden des Dosenkörpers 38 eingepresst. Die Bohrung des nun unter Druck stehenden Dosenkörpers 38 wird mit einem Spezialstopfen 70 verschlossen.FIG. 8 shows an inner bag 22 without a transition piece 34 (FIGS. 3, 6), which is fastened in an inner flange 62 of a can body 38. The sealing seam 28 is folded over in the region of the bag opening 30. A rolled edge 64 has a clamping effect on the laminate 10 with the folded sealing edge 66. A seal 68 is arranged between the can body 38 and the folded sealing edge 66. This can be a tubular seal, a sealing compound or a tubular, thermoplastic ring welded after assembly by the action of the joining parts. After the filling material has been added, the propellant gas 40 is pressed into the inner bag 22 through a hole in the bottom of the can body 38. The bore of the now under pressure Can body 38 is closed with a special stopper 70.

Selbstverständlich kann nach einer nicht dargestellten Variante auch ein Uebergangsstück 34 (Fig. 3, 6) in der Innenbördelung 62 befestigt werden.Of course, according to a variant not shown, a transition piece 34 (FIGS. 3, 6) can also be fastened in the inner flange 62.

Ein Abfüllbetrieb erhält vom Dosenfabrikanten den Zweikammer-Dispenser, welcher einen Dosenkörper mit eingeführtem, befestigtem Innenbeutel (Fig. 3, 6, 8) umfasst. Das Füllgut kann ohne weitere, für den Abfüller aufwendige Vorarbeiten zugegeben werden. Darauf verclincht der Abfüller einen Ventil- oder Pumpenteller 54. Falls es sich um eine Zweikammer-Druckpackung handelt, wird der Dosenkörper begast und verschlossen.A bottling company receives from the can manufacturer the two-chamber dispenser, which comprises a can body with an inserted, attached inner bag (FIGS. 3, 6, 8). The filling material can be added without further preparatory work for the bottler. The bottler then clips a valve or pump plate 54 onto it. If it is a two-chamber pressure pack, the can body is gassed and sealed.

Die erfindungsgemässe Ausführungsform des Zweikammer-Dispensers gewährleistet eine jahrelange, diffusionsfreie Lagerung der Zweikammerdruckgas- oder drucklosen Packung.The embodiment of the two-chamber dispenser according to the invention ensures years of diffusion-free storage of the two-chamber compressed gas or unpressurized pack.

Claims (10)

  1. Two-chamber dispenser for a pressure gas or pressureless pack, said dispenser including a rigid or semi-rigid one-piece can body (38) with a shoulder forming a flanged opening and an inserted flexible inner bag (22) made of a laminate (10) forming a diffusion barrier for a liquid, pasty or creamy product (42), said inner bag (22) having a neck with a bag opening (30) in the region of an outer or inner flange (36, 62) of the can body (38) intended for swaging a valve or pump plate (54) after filling, characterised in that the space between the flexible inner bag (22) and the can body (38) is already sealed in a diffusion-resistant manner in the region of the flange prior to the introduction of the product by the laminate (10) folded up in the transition region to a valve or a pump and directly adjacent to the can body (38) in the region of the flange (36, 62) by clamping the bag foil in an inner flange (62) of the can body (38) or by clamping the bag foil between an outer flange (36) of the can body (38) and a transition piece (34) fixed in the opening (30) and forming the neck of the inner bag.
  2. Two-chamber dispenser according to claim 1, characterised in that the transition piece (34) forming the neck consisting of an injection moulded or thermoformed plastic or of an aluminium-plastic laminate is glued, sealed or welded in an all-over manner in the opening (30) of the flexible bag (22) or the inner bag (22) is shrunk on to a transition piece (34).
  3. Two-chamber dispenser according to claim 1 or claim 2, characterised in that the upper edge (46) of the transition piece (34) above the laminate (10) is produced so that it bends outwardly in accordance with the geometric shape of the outer flange (36) and is glued, sealed or welded thereto.
  4. Two-chamber dispenser according to claim 1, characterised in that the neck of the inner bag (22) resting directly on the can body (38) is formed from a collar (60) of the laminate (10).
  5. Two-chamber dispenser according to one of claims 1 to 4, characterised in that the transition piece (34) of the inner bag (22) or the collar (60) of the laminate (10) is clamped into an inner flange (62), the welt (64) acting directly on the transition piece (34) or on the collar (60).
  6. Two-chamber dispenser according to claim 5, characterised in that a preferably tubular seal (68) is arranged, a sealing compound (68) is applied or a tubular thermoplastic ring (68) welded after assembly by heating the parts to be joined is arranged between the transition piece (34) or the collar (60) and the can body (38).
  7. Two-chamber dispenser according to one of claims 1 to 6, characterised in that the flexible inner bag (22) consists of a one-piece, folded laminate strip (10) with cut or bent edges (24, 26) sealed, glued or welded outside the bag opening (30), chamfers (32) preferably corresponding approximately to the shoulders of the can body (38) being formed on either side of the bag opening (30).
  8. Two-chamber dispenser according to one of claims 1 to 7, characterised in that the sealed seam (28) of the inner bag (22) is removed in the region of the bag opening (30), preferably at either side and in a chamfered manner.
  9. Two-chamber dispenser according to one of claims 1 to 3 or 5 to 7, characterised in that the transition piece (34) consists of polyethylene or polypropylene, preferably in the form of a co-extruded layer with diffusion-preventing properties and/or a metallised surface.
  10. Two-chamber dispenser according to one of claims 1 to 3, characterised in that an annular sealing bead (48) for the valve or pump plate (54) to be swaged is moulded on to the folded inner face of the transition piece (34).
EP90810066A 1989-01-31 1990-01-29 Two-chamber dispenser for a package under pressure or not Expired - Lifetime EP0381627B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90810066T ATE100409T1 (en) 1989-01-31 1990-01-29 TWO-CHAMBER DISPENSER FOR AEROSOLS OR NON-PRESSURED PACKING.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH33489 1989-01-31
CH334/89 1989-01-31

Publications (2)

Publication Number Publication Date
EP0381627A1 EP0381627A1 (en) 1990-08-08
EP0381627B1 true EP0381627B1 (en) 1994-01-19

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EP90810066A Expired - Lifetime EP0381627B1 (en) 1989-01-31 1990-01-29 Two-chamber dispenser for a package under pressure or not

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US (1) US5123560A (en)
EP (1) EP0381627B1 (en)
AT (1) ATE100409T1 (en)
DE (1) DE59004263D1 (en)
ES (1) ES2049012T3 (en)

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BR8807106A (en) * 1987-06-26 1989-10-31 Werding Winfried J DEVICE FOR STORAGE AND CONTROLLED SUPPLY OF PRODUCTS THAT ARE UNDER PRESSURE

Also Published As

Publication number Publication date
ATE100409T1 (en) 1994-02-15
EP0381627A1 (en) 1990-08-08
ES2049012T3 (en) 1994-04-01
DE59004263D1 (en) 1994-03-03
US5123560A (en) 1992-06-23

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