EP4031460B1 - Valve for a packaging container - Google Patents

Valve for a packaging container Download PDF

Info

Publication number
EP4031460B1
EP4031460B1 EP20776108.1A EP20776108A EP4031460B1 EP 4031460 B1 EP4031460 B1 EP 4031460B1 EP 20776108 A EP20776108 A EP 20776108A EP 4031460 B1 EP4031460 B1 EP 4031460B1
Authority
EP
European Patent Office
Prior art keywords
film
membrane
valve
frame
surrounding
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
EP20776108.1A
Other languages
German (de)
French (fr)
Other versions
EP4031460A1 (en
Inventor
Hans-Peter Stadel
Jenny Haase
Holger Poell
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.)
Syntegon Technology GmbH
Original Assignee
Syntegon Technology GmbH
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 Syntegon Technology GmbH filed Critical Syntegon Technology GmbH
Publication of EP4031460A1 publication Critical patent/EP4031460A1/en
Application granted granted Critical
Publication of EP4031460B1 publication Critical patent/EP4031460B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/22—Details
    • B65D77/225—Pressure relief-valves incorporated in a container wall, e.g. valves comprising at least one elastic element
    • 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
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/01—Ventilation or drainage of bags
    • 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
    • B65D2205/00—Venting means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7781—With separate connected fluid reactor surface
    • Y10T137/7793—With opening bias [e.g., pressure regulator]
    • Y10T137/7809—Reactor surface separated by apertured partition
    • Y10T137/782—Reactor surface is diaphragm
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7879—Resilient material valve
    • Y10T137/788—Having expansible port
    • Y10T137/7882—Having exit lip

Definitions

  • the present invention relates to a valve, in particular a pressure relief valve for a packaging container, according to the preamble of the independent claim.
  • valves are used in packaging technology when the contents tend to outgas, such as freshly roasted coffee.
  • a pressure relief valve for a packaging container is known with a base plate attached to the wall of the packaging container, which has a central valve hole covering a through hole in the wall of the packaging container, and with a valve membrane attached to the base plate with two parallel edge zones and leaving a channel zone free, which Valve hole is covered and rests tightly on the base plate in the closed position.
  • the valve hole is formed of at least two intersecting circular openings.
  • a generic pressure relief valve is known, which comprises a base body with a two-stage depression and a membrane, the membrane having a deformable surface directed towards a sealing surface.
  • a valve for a packaging container which has at least one base element designed as a pot-shaped plastic or metal component with an opening, at least one frame element designed as a pot-shaped plastic or metal component which surrounds a free area and at least one membrane which is arranged on the base element is and covers the opening, wherein a fluid is provided between the membrane and the base element.
  • a valve for a packaging container comprising at least one base film with an opening, at least one frame film which surrounds a free area, and at least one membrane which is arranged on the base film and covers the opening, with between the Membrane and the base film a fluid is provided, the membrane being connected to a surrounding film via at least one connection point, the surrounding film being connected to the base film on one side and to the frame film on the other side, and the membrane being movable within of the free area is arranged.
  • valve according to the invention for a packaging container is defined in the appended claims. It has the advantage over the prior art that the valve can be produced and applied more easily and cost-effectively. Furthermore, the method for producing the valve according to the invention is characterized by significantly reduced material usage.
  • the basic structure of the valve can be applied both outside the packaging container and, in a specific embodiment, inside the packaging container. This is possible according to the invention in that the membrane is arranged on a base film so that it is at least partially floating or freely movable within the free area.
  • the membrane is connected to a surrounding film via at least one connection point in such a way that the membrane is otherwise freely movable, the membrane is in the form of a web when the valve is manufactured and can therefore be introduced into the structure particularly easily using a continuous film web become.
  • the manufacturing process is further simplified.
  • the membrane is also no longer connected to the base body over a large area and is therefore significantly less affected by external influences, such as warping.
  • the surrounding film is open at least in one place, so that a channel is formed. This allows the excess pressure to be safely reduced. At the same time, however, the surrounding film can be made in one piece. This simplifies handling.
  • the connection point is particularly preferably arranged opposite the channel.
  • the valve according to the invention allows the membrane to be equipped with a preload, which can be helpful for the function of the valve.
  • the valve combines the good valve properties of an injection molded valve with those of a foil valve. It offers very low opening and closing pressures.
  • the valve is made up of several layers of film, which are produced, for example, on rotary punching tools and then laminated together. The joining is ideally carried out by a welded connection. Alternatively, an adhesion promoter such as glue could also be used.
  • the proposed valve can preferably be made from a single type of material and is therefore easier to recycle therefore more environmentally friendly and also easier to weld.
  • the film is made of polypropylene.
  • renewable materials such as plastics made from renewable raw materials or biodegradable plastics would also be possible.
  • the surrounding film is designed such that it at least partially surrounds the membrane in a circular or U-shaped manner. This geometry ensures easy attachment of the surrounding film to the base film and/or frame film while maintaining the above-mentioned functionality.
  • the thickness of the frame film is greater than the thickness of the membrane, preferably 75% to 225% greater. This makes it possible for the membrane to move freely in the direction of the free area.
  • the base film and/or the frame film and/or the cover film consists of polypropylene, OPP, PET, polyolefins or plastic, preferably renewable raw materials or biodegradable plastics. This can increase recyclability and environmental compatibility.
  • the surrounding film is on one side with the Base film and on the other side connected to the frame film, and the membrane is movably arranged within the free area.
  • a cover film is applied to the frame film.
  • the opening and/or the free area and/or the membrane is punched out. These steps can be carried out very easily with the selected film materials, further simplifying production.
  • a fluid to the base film and/or the membrane before the membrane is applied.
  • the fluid is applied between the base film and the membrane. This ensures that the membrane is securely connected to the base film at subsequent production sites.
  • the fluid can also be applied first in the applicator, which connects the valve to the packaging material.
  • the base film and/or surrounding film and/or frame film and/or cover film are connected, in particular laminated, via a welded connection.
  • unwanted adhesive which is also expensive, can be dispensed with in the manufacturing process due to increased cleaning requirements.
  • With an internal valve this prevents adhesive from being on the side facing the product.
  • Both the production of the opening and the production of the free area can be carried out in one and the same step with just one punching tool. This further simplifies production. By introducing the membrane in conjunction with the surrounding film, a high level of positioning accuracy can be achieved.
  • FIG. 1 shows an exemplary embodiment of the valve 8.
  • the valve 8 comprises a base film 10 with at least one opening 11.
  • the opening 11 has, for example, the geometry of two intersecting circles.
  • the membrane 12 is still connected to a surrounding film 20 with at least one particularly narrow connection region 22. However, the majority of the membrane 12 is still freely movable. Membrane 12, connection area 22 and surrounding film 20 therefore consist of a single part.
  • the surrounding film 20 encloses the membrane 12 except for a small channel 18.
  • At least one connection point 22 between the surrounding film 20 and the membrane 22 is formed on a central leg of the surrounding film 20.
  • Membrane 22 and surrounding film 20 consist of the same film or are formed in one piece. Therefore, the thickness of the surrounding film 20 corresponds to that of the membrane 12.
  • the surrounding film 20 is opened relatively narrowly on one side relative to the overall width. This allows channel 18 to form.
  • the majority of the membrane 12 can lift freely from the opening 11 or the base film 10. This is ensured by a free area 17 formed by the frame film 13 lying above it.
  • the free area 17 is designed in such a way that the membrane 12 can lift safely upwards into this free area 17.
  • the free area 17 of the frame film 13 is designed to be slightly larger than the membrane 12 and is arranged above the membrane 12.
  • the contour of the surrounding film 20 is at least partially oriented on the frame film 13.
  • the surrounding film 20 is connected to the frame film 13.
  • the connection of the base film 10 to the frame film 13 and/or the frame film 13 to the cover film 15 is preferably carried out by a welding process.
  • the foils 10, 13, 15 are designed to be weldable.
  • the foils 10, 13, 15 are preferably made of plastic.
  • the valve 8 particularly preferably consists of foils with the same material. Polypropylene is particularly suitable for this. Due to the uniform material of the various films 10, 13, 15, reusability is simplified. Plastics made from renewable raw materials or biodegradable plastics can also be used.
  • Base film 10 and/or frame film 13 and/or cover film 15 can consist, for example, of polypropylene, preferably of OPP (oriented polypropylene), a longitudinally stretched or biaxially stretched polypropylene.
  • Base film 10 and/or frame film 13 and/or cover film can alternatively consist of PET or a composite film such as PP-EVOH-PP.
  • the material for the membrane 12 is characterized by a high oxygen barrier.
  • the membrane 12 is made of PET or a composite material such as PP-EVOH-PP.
  • the valve according to Figure 3 is designed as an internal valve 8. On the one hand, it is missing compared to the exemplary embodiment Figure 1 the cover film 15 and the channel 18. The other side of the opening 11 is covered by a filter 16, in particular a filter fleece 16.
  • the filter 16 or the fleece is required to prevent particles of the filling material from penetrating the valve 8 between the membrane 12 and the base film 10, which would impair the function.
  • the membrane 12 is again connected to the surrounding film 20 via the connection point 22, so that it is a one-piece design.
  • the edge lengths of the base film 10 can be in the range between preferably 12.5 and 20 mm.
  • the thickness of the base film 10 is preferably in the range of 0.1 mm and 0.25 mm, particularly preferably 0.125 mm, for example.
  • the fluid for example silicone oil or fluids based on bio-based materials or renewable raw materials, for example based on palm oil, coconut oil or similar, is applied as a fluid film.
  • the volume of the fluid film is approx. 2-5 ⁇ l.
  • the thickness of the membrane 12 is, for example, in a range between 0.025 mm to 0.075 mm, preferably 0.05 mm.
  • the thickness of the frame film 13 is, for example, in the range between 0.1 mm and 0.2 mm.
  • the thickness of the frame film 13 is greater than the thickness of the membrane 12.
  • the thickness of a possible cover film 15 is, for example, in the range from 0.05 mm to 0.15 mm, particularly preferably 0.1 mm. Depending on the application, material selection, connection method, etc., the thicknesses can vary accordingly.
  • the membrane 12 for example, a film corresponding to the base area of the base film 10 is punched out in such a way that the circular contour of the membrane 12 results.
  • the membrane 12 is connected to the surrounding film 20 at least at one or more points (or at one or more small webs) or connection points 22.
  • the production and positioning of the membrane 12 can thereby be simplified.
  • the point or points 22 at which the membrane 12 is still connected to the surrounding film 20 is small in relation to the circumferential direction of the membrane 12, so that the membrane 12 can be lifted off in the free areas.
  • connection points 22 can also be provided. These connection points 22 must be arranged in such a way that it is still possible to safely lift the membrane 12 from the opening 11.
  • the manufacturing process according to Figure 2 serves to produce a valve 8 according to Figure 1 . It is characterized by the fact that there are separate film strips for the base film 10, the surrounding film 20 with adhering membrane 12, the frame film 13 and, if necessary, for the cover film 15 be supplied.
  • the individual film strips of the films 10, 13, 15, 20 mentioned generally have an identical width.
  • the base film 10 is provided.
  • the base film 10 can already have openings 11.
  • the openings 11 could be created on site, for example punched. However, the punching must be carried out before the lamination process.
  • a fluid or fluid film is applied to the base film 10, specifically to the places where the membrane 12 will later come to rest, in particular to the area surrounding the opening 11.
  • the fluid film could already be applied to the underside of the membrane 12.
  • the fluid could also be applied later, for example in the applicator that connects the valve to the packaging material.
  • the surrounding film 20 with the membrane 12 connected via the connection point 22 is applied to the base film 10.
  • a corresponding punching process can create the outlines of the membrane 12 and/or punch out the later channel zone 18.
  • the membrane 12 is separated from the surrounding film in such a way that both are only connected to one another through the at least one connection point 22.
  • the surrounding film 20 with the membrane 12 connected by the connection point 22 is firmly connected to the base film 10.
  • the connection can preferably be made with a corresponding welded connection. Examples of possible welding processes include: hot air welding, thermal contact welding, induction, cold welding and ultrasonic welding (possibly others). Alternatively, other connection methods such as gluing etc. are also possible.
  • the frame film 13 is then applied to the surrounding film 20.
  • the free area 17 comes to lie above the membrane 12. This makes it possible for the membrane 12 to be lifted off into the free area 17.
  • the free area 17 is punched out of the frame film 13.
  • the applied frame film 13 is connected to the surrounding film 20 connected. As already described, this can preferably be done with a corresponding welded connection. Alternatively, other connection methods such as gluing are also possible. It is important that only the surrounding film 20 is connected to the frame film 13, but not the membrane 12. The free mobility of the membrane 12, which is only held movably via at least one connection point 22, is thereby ensured.
  • the cover film 15 can then be applied to the frame film 13.
  • the cover film 15 is then connected to the frame film 13. As already described, this can preferably be done with a corresponding welded connection. Alternatively, other connection methods such as gluing are also possible. For example, for internal valves 8 that do not require a cover film 15, this step could also be omitted.
  • valves 8 which are arranged contiguously on a film web, can take place in the packaging machine, in particular as described by the applicator. Alternatively, the separation could also take place directly after the foils 10, 13, 15, 20 have been joined together.
  • valves 8 described are used, for example, as aroma protection valves in packaging of outgassing products such as coffee beans, ground coffee, fresh dough or the like, in which excess pressure is created after packaging in the packaging due to outgassing filling goods. Pressure is reduced by raising the membrane 12 relative to the opening 11 or the base film 10 and then escaping via the free area 17 or - in the case of an external valve - via at least one side channel connected to the free area 17 18, which is formed between frame film 13 and cover film 15.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Bag Frames (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Description

Stand der TechnikState of the art

Die vorliegende Erfindung betrifft ein Ventil, insbesondere ein Überdruckventil für einen Verpackungsbehälter, nach der Gattung des unabhängigen Anspruchs.The present invention relates to a valve, in particular a pressure relief valve for a packaging container, according to the preamble of the independent claim.

Derartige Ventile kommen in der Verpackungstechnik zum Einsatz, wenn das Füllgut zum Ausgasen neigt wie beispielsweise bei frisch geröstetem Kaffee. So ist beispielsweise aus der EP 760790 B1 ein Überdruckventil für einen Verpackungsbehälter mit einer an der Wand des Verpackungsbehälters befestigten Basisplatte bekannt, die ein zentrales, ein Durchgangsloch in der Wand des Verpackungsbehälters überdeckendes Ventilloch aufweist, und mit einer auf der Basisplatte mit zwei parallelen Randzonen befestigten, eine Kanalzone freilassenden Ventilmembran, die das Ventilloch überdeckt und in Schließlage auf der Basisplatte dicht aufliegt. Das Ventilloch ist aus wenigstens zwei sich schneidenden, kreisförmigen Öffnungen ausgebildet. Aus der EP 2396244 B1 ist ein gattungsgemäßes Überdruckventil bekannt, welches einen Grundkörper mit einer zweistufig ausgebildeten Vertiefung und eine Membran umfasst, wobei die Membran eine zu einer Dichtfläche gerichtete, verformbare Oberfläche aufweist. Der Grundkörper ist relativ komplex aufgebaut. Ein weiteres gattungsgemäßes Ventil ist aus der EP 602418 B1 bekannt. Des Weiteren ist aus der WO 2016/072663 A1 bereits ein Ventil für einen Verpackungsbehälter bekannt, das zumindest ein als topfförmiges Kunststoff- oder Metallbauteil ausgebildetes Grundelement mit einer Öffnung, zumindest ein als topfförmiges Kunststoff- oder Metallbauteil ausgebildetes Rahmenelement aufweist, welches einen freien Bereich umgibt und zumindest eine Membran, welche auf dem Grundelement angeordnet ist und die Öffnung überdeckt, umfasst, wobei zwischen der Membran und dem Grundelement ein Fluid vorgesehen ist.Such valves are used in packaging technology when the contents tend to outgas, such as freshly roasted coffee. For example, from the EP 760790 B1 a pressure relief valve for a packaging container is known with a base plate attached to the wall of the packaging container, which has a central valve hole covering a through hole in the wall of the packaging container, and with a valve membrane attached to the base plate with two parallel edge zones and leaving a channel zone free, which Valve hole is covered and rests tightly on the base plate in the closed position. The valve hole is formed of at least two intersecting circular openings. From the EP 2396244 B1 a generic pressure relief valve is known, which comprises a base body with a two-stage depression and a membrane, the membrane having a deformable surface directed towards a sealing surface. The basic body is relatively complex. Another generic valve is from the EP 602418 B1 known. Furthermore, from the WO 2016/072663 A1 A valve for a packaging container is already known, which has at least one base element designed as a pot-shaped plastic or metal component with an opening, at least one frame element designed as a pot-shaped plastic or metal component which surrounds a free area and at least one membrane which is arranged on the base element is and covers the opening, wherein a fluid is provided between the membrane and the base element.

Des Weiteren ist aus der US 2012/243807 A1 bereits ein Ventil für einen Verpackungsbehälter bekannt, wobei das bereits bekannte Ventil zumindest eine Grundfolie mit einer Öffnung, zumindest eine Rahmenfolie, die einen freien Bereich umgibt, und zumindest eine Membran umfasst, die auf der Grundfolie angeordnet ist und die Öffnung überdeckt, wobei zwischen der Membran und der Grundfolie ein Fluid vorgesehen ist, wobei die Membran über zumindest eine Verbindungsstelle mit einer umliegenden Folie verbunden ist, wobei die umliegende Folie auf der einen Seite mit der Grundfolie und auf der anderen Seite mit der Rahmenfolie verbunden ist, und die Membran beweglich innerhalb des freien Bereichs angeordnet ist.Furthermore, from the US 2012/243807 A1 a valve for a packaging container is already known, the already known valve comprising at least one base film with an opening, at least one frame film which surrounds a free area, and at least one membrane which is arranged on the base film and covers the opening, with between the Membrane and the base film a fluid is provided, the membrane being connected to a surrounding film via at least one connection point, the surrounding film being connected to the base film on one side and to the frame film on the other side, and the membrane being movable within of the free area is arranged.

Offenbarung der Erfindung Das erfindungsgemäße Ventil für einen Verpackungsbehälter ist in den beiliegenden Ansprüchen definiert. Es hat dem Stand der Technik gegenüber den Vorteil, dass das Ventil einfacher und kostengünstiger produziert und appliziert werden kann. Weiterhin zeichnet sich das Verfahren zum Herstellen des erfindungsgemäßen Ventils durch deutlich reduzierten Materialeinsatz aus. Der grundsätzliche Aufbau des Ventils kann sowohl außerhalb des Verpackungsbehälters wie auch in einer bestimmten Ausführungsvariante innerhalb am Verpackungsbehälter appliziert werden. Dies wird erfindungsgemäß dadurch möglich, dass die Membran auf einer Grundfolie zumindest teilweise schwimmend bzw. frei beweglich innerhalb des freien Bereichs angeordnet ist. Dadurch, dass die Membran über zumindest eine Verbindungsstelle mit einer umliegenden Folie so verbunden ist, dass die Membran ansonsten frei bewegbar ist, liegt die Membran bei der Herstellung des Ventils bahnförmig vor und kann dadurch besonders einfach durch eine am Stück zusammenhängende Folienbahn in den Aufbau eingebracht werden. Der Herstellerprozess vereinfacht sich weiter. Die Membran ist zudem nicht mehr großflächig am Grundkörper verbunden und wird somit deutlich weniger von äußeren Einflüssen beeinträchtigt wie beispielsweise Verzug. Erfindungsgemäß ist die umliegende Folie zumindest an einer Stelle offen, so dass sich ein Kanal ausbildet. Über diesen lässt sich der Überdruck sicher abbauen. Zugleich kann jedoch die umliegende Folie einteilig ausgebildet sein. Dadurch vereinfacht sich das Handling. Besonders bevorzugt ist die Verbindungsstelle gegenüberliegend zum Kanal angeordnet. Damit kann die Membran besonders gut in Richtung zum Kanal hin abheben zum Abbau des Überdrucks in dem Verpackungsbehälter. Durch den vorgeschlagenen Aufbau von Grundfolie, Rahmenfolie und gegebenenfalls Deckfolie (quasi eine Art Doppel-T-Träger) ergibt sich eine hohe Biegesteifigkeit bei vergleichsweise geringem Materialeinsatz. Weiterhin erlaubt das erfindungsgemäße Ventil, dass die Membran mit einer Vorspannung ausgestattet werden kann, die für die Funktion des Ventils hilfreich sein kann. Das Ventil kombiniert die guten Ventileigenschaften eines spritzgegossenen Ventils mit denen eines Folienventils. Es bietet sehr geringe Öffnungs- und Schließdrücke. Aufgebaut wird das Ventil aus mehreren Folienschichten, die beispielsweise auf Rotationsstanzwerkzeugen hergestellt und anschließend aufeinander laminiert werden. Das Fügen erfolgt idealerweise durch eine Schweißverbindung. Alternativ könnte auch ein Haftvermittler wie Klebstoff eingesetzt werden. Das vorgeschlagene Ventil kann bevorzugt aus einer einzelnen Materialsorte hergestellt werden und ist damit leichter rezyklierbar und somit umweltverträglicher sowie auch leicht schweißbarer. In einer zweckmäßigen Weiterbildung besteht die Folie aus Polypropylen. Jedoch auch erneuerbare Materialien wie beispielsweise Kunststoffe aus nachwachsenden Rohstoffen oder biologisch abbaubare Kunststoffe wären möglich.Disclosure of the Invention The valve according to the invention for a packaging container is defined in the appended claims. It has the advantage over the prior art that the valve can be produced and applied more easily and cost-effectively. Furthermore, the method for producing the valve according to the invention is characterized by significantly reduced material usage. The basic structure of the valve can be applied both outside the packaging container and, in a specific embodiment, inside the packaging container. This is possible according to the invention in that the membrane is arranged on a base film so that it is at least partially floating or freely movable within the free area. Because the membrane is connected to a surrounding film via at least one connection point in such a way that the membrane is otherwise freely movable, the membrane is in the form of a web when the valve is manufactured and can therefore be introduced into the structure particularly easily using a continuous film web become. The manufacturing process is further simplified. The membrane is also no longer connected to the base body over a large area and is therefore significantly less affected by external influences, such as warping. According to the invention, the surrounding film is open at least in one place, so that a channel is formed. This allows the excess pressure to be safely reduced. At the same time, however, the surrounding film can be made in one piece. This simplifies handling. The connection point is particularly preferably arranged opposite the channel. This allows the membrane to lift particularly well towards the channel in order to reduce the excess pressure in the packaging container. The proposed structure of base film, frame film and, if necessary, cover film (a type of double-T beam) results in high bending stiffness with comparatively little use of material. Furthermore, the valve according to the invention allows the membrane to be equipped with a preload, which can be helpful for the function of the valve. The valve combines the good valve properties of an injection molded valve with those of a foil valve. It offers very low opening and closing pressures. The valve is made up of several layers of film, which are produced, for example, on rotary punching tools and then laminated together. The joining is ideally carried out by a welded connection. Alternatively, an adhesion promoter such as glue could also be used. The proposed valve can preferably be made from a single type of material and is therefore easier to recycle therefore more environmentally friendly and also easier to weld. In a practical further development, the film is made of polypropylene. However, renewable materials such as plastics made from renewable raw materials or biodegradable plastics would also be possible.

In einer zweckmäßigen Weiterbildung ist die umliegende Folie so ausgebildet, dass sie die Membran kreisförmig oder U-förmig zumindest teilweise umgibt. Diese Geometrie stellt eine einfache Anbringung der umliegenden Folie auf der Grundfolie und/oder Rahmenfolie sicher bei Beibehaltung der o.g. Funktionalität.In an expedient development, the surrounding film is designed such that it at least partially surrounds the membrane in a circular or U-shaped manner. This geometry ensures easy attachment of the surrounding film to the base film and/or frame film while maintaining the above-mentioned functionality.

In einer zweckmäßigen Weiterbildung ist die Dicke der Rahmenfolie größer als die Dicke der Membran, vorzugsweise um 75% bis 225 % größer. Damit wird eine hinreichend gute freie Beweglichkeit der Membran in Richtung des freien Bereichs möglich.In an expedient development, the thickness of the frame film is greater than the thickness of the membrane, preferably 75% to 225% greater. This makes it possible for the membrane to move freely in the direction of the free area.

In einer zweckmäßigen Weiterbildung besteht die Grundfolie und/oder die Rahmenfolie und/oder die Deckfolie aus Polypropylen, OPP, PET, Polyolefine oder aus Kunststoff, vorzugsweise aus nachwachsenden Rohstoffen oder biologisch abbaubaren Kunststoffen. Dadurch kann die Wiederverwertbarkeit bzw. Umweltverträglichkeit erhöht werden.In an expedient further development, the base film and/or the frame film and/or the cover film consists of polypropylene, OPP, PET, polyolefins or plastic, preferably renewable raw materials or biodegradable plastics. This can increase recyclability and environmental compatibility.

Bei einem möglichen Verfahren zur Herstellung des Ventils für einen Verpackungsbehälter wird die umliegende Folie auf der einen Seite mit der Grundfolie und auf der anderen Seite mit der Rahmenfolie verbunden, und die Membran wird beweglich innerhalb des freien Bereichs angeordnet. Insbesondere wird eine Deckfolie auf die Rahmenfolie aufgebracht.In a possible method for producing the valve for a packaging container, the surrounding film is on one side with the Base film and on the other side connected to the frame film, and the membrane is movably arranged within the free area. In particular, a cover film is applied to the frame film.

In einer zweckmäßigen Weiterbildung wird die Öffnung und/oder der freie Bereich und/oder die Membran ausgestanzt. Diese Schritte können sehr einfach bei den gewählten Folienmaterialien durchgeführt werden, sodass sich die Herstellung weiter vereinfacht.In an expedient development, the opening and/or the free area and/or the membrane is punched out. These steps can be carried out very easily with the selected film materials, further simplifying production.

Besonders zweckmäßig wird vor dem Aufbringen der Membran ein Fluid auf die Grundfolie und/oder die Membran aufgebracht. Insbesondere wird vor dem Aufbringen der umliegenden Folie mit verbundener Membran auf der Grundfolie das Fluid zwischen Grundfolie und Membran aufgebracht. Dadurch wird sichergestellt, dass die Membran auch bei den nachfolgenden Produktionsstätten sicher mit der Grundfolie verbunden ist. Alternativ kann das Fluid auch erst im Applikator, der das Ventil mit dem Verpackungsmaterial verbindet, aufgebracht werden.It is particularly expedient to apply a fluid to the base film and/or the membrane before the membrane is applied. In particular, before the surrounding film with a connected membrane is applied to the base film, the fluid is applied between the base film and the membrane. This ensures that the membrane is securely connected to the base film at subsequent production sites. Alternatively, the fluid can also be applied first in the applicator, which connects the valve to the packaging material.

In einer zweckmäßigen Weiterbildung werden Grundfolie und/oder umliegende Folie und/oder Rahmenfolie und/oder Deckfolie über eine Schweißverbindung verbunden, insbesondere laminiert. Dadurch kann im Herstellprozess aufgrund erhöhter Reinigungsanforderungen auf unerwünschten Klebstoff verzichtet werden, der zudem teuer ist. Bei einem innenliegenden Ventil wird so vermieden, dass sich Klebstoff auf der dem Produkt zugewandten Seite befindet.In an expedient further development, the base film and/or surrounding film and/or frame film and/or cover film are connected, in particular laminated, via a welded connection. This means that unwanted adhesive, which is also expensive, can be dispensed with in the manufacturing process due to increased cleaning requirements. With an internal valve, this prevents adhesive from being on the side facing the product.

Sowohl die Herstellung der Öffnung wie auch die Herstellung des freien Bereichs kann in ein und demselben Schritt mit nur einem Stanzwerkzeug vorgenommen werden. Dies vereinfacht die Herstellung weiter. Durch das Einbringen der Membran in Verbindung mit der umliegenden Folie kann eine hohe Positionsgenauigkeit erreicht werden.Both the production of the opening and the production of the free area can be carried out in one and the same step with just one punching tool. This further simplifies production. By introducing the membrane in conjunction with the surrounding film, a high level of positioning accuracy can be achieved.

Weitere zweckmäßige Weiterbildungen ergeben sich aus weiteren abhängigen Ansprüchen und aus der Beschreibung.Further useful developments result from further dependent claims and from the description.

Kurzbeschreibung der FigurenShort description of the characters

Unter Bezugnahme auf die beigefügten Figuren werden Ausführungsformen der Erfindung im Detail beschrieben. Es zeigen:

Figur 1
ein Ausführungsbeispiel eines außenliegenden Ventils, bei dem die Membran mit der umliegenden Folie teilweise verbunden ist,
Figur 2
ein Herstellerverfahren für das Ventil gemäß Figur 1, bei dem ebenfalls einzelne Folienbahnen gestanzt und geschweißt werden sowie
Figur 3
ein Beispiel eines bekannten innenliegenden Ventils, bei dem die Membran mit der umliegenden Folie teilweise verbunden ist.
Embodiments of the invention will be described in detail with reference to the accompanying figures. Show it:
Figure 1
an embodiment of an external valve in which the membrane is partially connected to the surrounding film,
Figure 2
a manufacturer's procedure for the valve Figure 1 , in which individual film strips are also punched and welded
Figure 3
an example of a known internal valve in which the membrane is partially connected to the surrounding film.

Bevorzugte Ausführungsformen der ErfindungPreferred embodiments of the invention

Nachfolgend werden unter Bezugnahme auf die Figuren die Ausführungsbeispiele der Erfindung im Detail beschrieben.The exemplary embodiments of the invention are described in detail below with reference to the figures.

Figur 1 zeigt ein Ausführungsbeispiel des Ventils 8. Das Ventil 8 umfasst eine Grundfolie 10, mit zumindest einer Öffnung 11. Die Öffnung 11 weist beispielsweise die Geometrie von zwei sich schneidenden Kreisen auf. Die Membran 12 ist mit mindestens einem insbesondere schmalen Verbindungsbereich 22 mit einer umliegenden Folie 20 noch verbunden ist. Der überwiegende Teil der Membran 12 ist jedoch immer noch frei beweglich. Membran 12, Verbindungsbereich 22 und umliegende Folie 20 bestehen somit aus einem einzigen Teil. Die umliegende Folie 20 umschließt die Membran 12 bis auf einen kleinen Kanal 18. An einem mittleren Schenkel der umliegenden Folie 20 ist die zumindest eine die Verbindungsstelle 22 zwischen der umliegenden Folie 20 und der Membran 22 ausgebildet. Membran 22 und umliegende Folie 20 bestehen aus derselben Folie bzw. sind einteilig ausgebildet. Daher entspricht die Dicke der umliegenden Folie 20 derjenigen der Membran 12. Im Ausführungsbeispiel ist die umliegende Folie 20 auf einer Seite relativ schmal bezogen die Gesamtbreite geöffnet. Dadurch kann sich der Kanal 18 ausbilden. Figure 1 shows an exemplary embodiment of the valve 8. The valve 8 comprises a base film 10 with at least one opening 11. The opening 11 has, for example, the geometry of two intersecting circles. The membrane 12 is still connected to a surrounding film 20 with at least one particularly narrow connection region 22. However, the majority of the membrane 12 is still freely movable. Membrane 12, connection area 22 and surrounding film 20 therefore consist of a single part. The surrounding film 20 encloses the membrane 12 except for a small channel 18. At least one connection point 22 between the surrounding film 20 and the membrane 22 is formed on a central leg of the surrounding film 20. Membrane 22 and surrounding film 20 consist of the same film or are formed in one piece. Therefore, the thickness of the surrounding film 20 corresponds to that of the membrane 12. In the exemplary embodiment, the surrounding film 20 is opened relatively narrowly on one side relative to the overall width. This allows channel 18 to form.

Der Großteil der Membran 12 kann frei von der Öffnung 11 bzw. der Grundfolie 10 abheben. Dies wird sichergestellt durch einen von der darüber liegenden Rahmenfolie 13 gebildeten freien Bereich 17. Der freie Bereich 17 ist so gestaltet, dass die Membran 12 sicher nach oben in diesen freien Bereich 17 hinein abheben kann. Hierzu ist der freie Bereich 17 der Rahmenfolie 13 etwas größer als die Membran 12 ausgebildet und oberhalb der Membran 12 angeordnet. Die Kontur der umliegenden Folie 20 orientiert sich zumindest teilweise an der Rahmenfolie 13. Die umliegende Folie 20 ist mit der Rahmenfolie 13 verbunden.The majority of the membrane 12 can lift freely from the opening 11 or the base film 10. This is ensured by a free area 17 formed by the frame film 13 lying above it. The free area 17 is designed in such a way that the membrane 12 can lift safely upwards into this free area 17. For this purpose, the free area 17 of the frame film 13 is designed to be slightly larger than the membrane 12 and is arranged above the membrane 12. The contour of the surrounding film 20 is at least partially oriented on the frame film 13. The surrounding film 20 is connected to the frame film 13.

Die Verbindung der Grundfolie 10 mit der Rahmenfolie 13 und/oder der Rahmenfolie 13 mit der Deckfolie 15 erfolgt bevorzugt durch ein Schweißverfahren. Die Folien 10, 13, 15 sind schweißbar ausgebildet. Die Folien 10, 13, 15 bestehen bevorzugt aus Kunststoff. Besonders bevorzugt besteht das Ventil 8 aus Folien mit demselben Material. Besonders eignet sich hierbei Polypropylen. Aufgrund des einheitlichen Materials der verschiedenen Folien 10,13, 15 vereinfacht sich die Wiederverwendbarkeit. Auch Kunststoffe aus nachwachsenden Rohstoffen oder biologisch abbaubare Kunststoffe können zum Einsatz kommen. Grundfolie 10 und/oder Rahmenfolie 13 und/oder Deckfolie 15 können beispielsweise aus Polypropylen bestehen, bevorzugt aus OPP (oriented polypropylene), einem längsverstreckten oder biaxial verstreckten Polypropylen. Grundfolie 10 und/oder Rahmenfolie 13 und/oder Deckfolie können alternativ aus PET oder einer Verbundfolie wie beispielsweise PP-EVOH-PP bestehen. Das Material für die Membran 12 zeichnet sich durch eine hohe Sauerstoffbarriere aus. Beispielsweise besteht die Membran 12 aus PET oder einem Verbundmaterial wie PP-EVOH-PP.The connection of the base film 10 to the frame film 13 and/or the frame film 13 to the cover film 15 is preferably carried out by a welding process. The foils 10, 13, 15 are designed to be weldable. The foils 10, 13, 15 are preferably made of plastic. The valve 8 particularly preferably consists of foils with the same material. Polypropylene is particularly suitable for this. Due to the uniform material of the various films 10, 13, 15, reusability is simplified. Plastics made from renewable raw materials or biodegradable plastics can also be used. Base film 10 and/or frame film 13 and/or cover film 15 can consist, for example, of polypropylene, preferably of OPP (oriented polypropylene), a longitudinally stretched or biaxially stretched polypropylene. Base film 10 and/or frame film 13 and/or cover film can alternatively consist of PET or a composite film such as PP-EVOH-PP. The material for the membrane 12 is characterized by a high oxygen barrier. For example, the membrane 12 is made of PET or a composite material such as PP-EVOH-PP.

Das Ventil gemäß Figur 3 ist als innenliegendes Ventil 8 ausgeführt. Zum einen fehlt gegenüber dem Ausführungsbeispiel nach Figur 1 die Deckfolie 15 sowie der Kanal 18. Die andere Seite der Öffnung 11 wird durch ein Filter 16, insbesondere ein Filtervlies 16 überdeckt. Der Filter 16 bzw. das Vlies wird benötigt, um zu verhindern, dass Partikel des Füllguts in das Ventil 8 zwischen Membran 12 und Grundfolie 10 eindringen können, wodurch die Funktion beeinträchtigt würde. Insbesondere jedoch ist wiederum die Membran 12 über die Verbindungsstelle 22 mit der umliegenden Folie 20 verbunden, sodass es sich um eine einteilige Ausführung handelt.The valve according to Figure 3 is designed as an internal valve 8. On the one hand, it is missing compared to the exemplary embodiment Figure 1 the cover film 15 and the channel 18. The other side of the opening 11 is covered by a filter 16, in particular a filter fleece 16. The filter 16 or the fleece is required to prevent particles of the filling material from penetrating the valve 8 between the membrane 12 and the base film 10, which would impair the function. In particular, however, the membrane 12 is again connected to the surrounding film 20 via the connection point 22, so that it is a one-piece design.

Nachfolgende Geometrien könnten sich für das Ventil 8 besonders eignen. Bei den Ausführungsbeispielen gemäß Figur 1 bzw. 3 können die Kantenlängen der Grundfolie 10 im Bereich zwischen bevorzugt 12,5 und 20 mm liegen. Die Dicke der Grundfolie 10 bewegt sich bevorzugt im Bereich von 0,1 mm und 0,25 mm, besonders bevorzugt beispielsweise 0,125 mm. Das Fluid, beispielsweise Silikonöl oder Fluide auf Basis von bio-basierten Materialien bzw. nachwachsenden Rohstoffen, beispielsweise auf Basis von Palmöl, Kokosöl oder Ähnliches, wird als Fluidfilm aufgetragen. Das Volumen des Fluidfilms beträgt ca. 2-5 µl. Die Dicke der Membran 12 liegt beispielsweise in einem Bereich zwischen 0,025 mm bis 0,075 mm, bevorzugt bei 0,05 mm. Die Dicke der Rahmenfolie 13 liegt beispielsweise im Bereich zwischen 0,1 mm und 0,2 mm. Die Dicke der Rahmenfolie 13 ist größer als die Dicke der Membran 12. Die Dicke einer möglichen Deckfolie 15 liegt beispielsweise im Bereich von 0,05 mm bis 0,15 mm, besonders bevorzugt bei 0,1 mm. Je nach Anwendungsfall, Materialauswahl, Verbindungsverfahren etc. können die Dicken entsprechend variieren.The following geometries could be particularly suitable for the valve 8. In the exemplary embodiments according to Figure 1 or 3, the edge lengths of the base film 10 can be in the range between preferably 12.5 and 20 mm. The thickness of the base film 10 is preferably in the range of 0.1 mm and 0.25 mm, particularly preferably 0.125 mm, for example. The fluid, for example silicone oil or fluids based on bio-based materials or renewable raw materials, for example based on palm oil, coconut oil or similar, is applied as a fluid film. The volume of the fluid film is approx. 2-5 µl. The thickness of the membrane 12 is, for example, in a range between 0.025 mm to 0.075 mm, preferably 0.05 mm. The thickness of the frame film 13 is, for example, in the range between 0.1 mm and 0.2 mm. The thickness of the frame film 13 is greater than the thickness of the membrane 12. The thickness of a possible cover film 15 is, for example, in the range from 0.05 mm to 0.15 mm, particularly preferably 0.1 mm. Depending on the application, material selection, connection method, etc., the thicknesses can vary accordingly.

Zur Herstellung der Membran 12 wird beispielsweise eine der Grundfläche der Grundfolie 10 entsprechende Folie so ausgestanzt, dass sich die kreisförmige Kontur der Membran 12 ergibt. Für den Herstellungsprozess ist es vorteilhaft, wenn die Membran 12 zumindest an einem oder mehreren Punkten (bzw. an einem oder mehreren kleinen Stegen) bzw. Verbindungsstellen 22 mit der umliegenden Folie 20 verbunden ist. Die Herstellung und Positionierung der Membran 12 kann dadurch vereinfacht werden. Die Stelle bzw. Stellen 22, an denen die Membran 12 noch mit der umliegenden Folie 20 verbunden ist, ist bezogen auf die Umfangsrichtung der Membran 12 klein, so dass ein Abheben der Membran 12 in den freien Bereichen sichergestellt bleibt.To produce the membrane 12, for example, a film corresponding to the base area of the base film 10 is punched out in such a way that the circular contour of the membrane 12 results. For the manufacturing process, it is advantageous if the membrane 12 is connected to the surrounding film 20 at least at one or more points (or at one or more small webs) or connection points 22. The production and positioning of the membrane 12 can thereby be simplified. The point or points 22 at which the membrane 12 is still connected to the surrounding film 20 is small in relation to the circumferential direction of the membrane 12, so that the membrane 12 can be lifted off in the free areas.

Jedoch auch mehrere Verbindungsstellen 22 können vorgesehen sein. Diese Verbindungsstellen 22 sind so anzuordnen, dass weiterhin ein Abheben der Membran 12 von der Öffnung 11 sicher möglich ist.However, several connection points 22 can also be provided. These connection points 22 must be arranged in such a way that it is still possible to safely lift the membrane 12 from the opening 11.

Das Herstellverfahren gemäß Figur 2 dient der Herstellung eines Ventils 8 gemäß Figur 1. Es zeichnet sich dadurch aus, dass jeweils separate Folienbahnen für die Grundfolie 10, die umliegenden Folie 20 mit anhaftender Membran 12, die Rahmenfolie 13 bzw. gegebenenfalls für die Deckfolie 15 zugeführt werden. Die einzelnen Folienstreifen der genannten Folien 10, 13, 15, 20 besitzen in der Regel eine identische Breite.The manufacturing process according to Figure 2 serves to produce a valve 8 according to Figure 1 . It is characterized by the fact that there are separate film strips for the base film 10, the surrounding film 20 with adhering membrane 12, the frame film 13 and, if necessary, for the cover film 15 be supplied. The individual film strips of the films 10, 13, 15, 20 mentioned generally have an identical width.

Zunächst wird die Grundfolie 10 bereitgestellt. Die Grundfolie 10 kann bereits Öffnungen 11 aufweisen. Alternativ könnten die Öffnungen 11 vor Ort erstellt, beispielsweise gestanzt werden. Die Ausstanzung in sind jedoch vor dem Laminationsprozess vorzunehmen.First, the base film 10 is provided. The base film 10 can already have openings 11. Alternatively, the openings 11 could be created on site, for example punched. However, the punching must be carried out before the lamination process.

In einem weiteren Schritt wird ein Fluid bzw. Fluidfilm auf die Grundfolie 10 aufgebracht, und zwar auf die Stellen, wo später die Membran 12 zu liegen kommt, insbesondere auf den die Öffnung 11 umgebenden Bereich. Alternativ könnte der Fluidfilm bereits auf der Unterseite der Membran 12 appliziert werden. Alternativ könnte das Fluid auch später aufgebracht werden, beispielsweise im Applikator, der das Ventil mit dem Verpackungsmaterial verbindet.In a further step, a fluid or fluid film is applied to the base film 10, specifically to the places where the membrane 12 will later come to rest, in particular to the area surrounding the opening 11. Alternatively, the fluid film could already be applied to the underside of the membrane 12. Alternatively, the fluid could also be applied later, for example in the applicator that connects the valve to the packaging material.

In einem weiteren Schritt wird die umliegende Folie 20 mit über die Verbindungsstelle 22 verbundener Membran 12 auf die Grundfolie 10 aufgebracht. Zur Herstellung der umliegenden Folie 20 mit über die Verbindungsstelle 22 verbundener Membran 12 und/oder zumindest einen Kanal 18 kann ein entsprechender Stanzvorgang die Umrisse der Membran 12 erstellen und/oder die spätere Kanalzone 18 ausstanzen. Durch den Stanzvorgang wird die Membran 12 von der umliegenden Folie so getrennt, dass beide lediglich nur noch durch die zumindest eine Verbindungsstelle 22 miteinander verbunden sind. Die umliegende Folie 20 mit der durch die Verbindungsstelle 22 verbundenen Membran 12 wird mit der Grundfolie 10 fest verbunden. Die Verbindung kann wie bereits beschrieben bevorzugt mit einer entsprechenden Schweißverbindung erfolgen. Als Schweißverfahren kommen beispielsweise in Betracht: Heißluft-Schweißen-, Wärmekontakt-Schweißen, Induktion, Kaltverschweißung und Ultraschallschweißen (eventuell auch andere). Alternativ werden jedoch auch sonstige Verbindungsverfahren wie Kleben etc. möglich.In a further step, the surrounding film 20 with the membrane 12 connected via the connection point 22 is applied to the base film 10. To produce the surrounding film 20 with a membrane 12 connected via the connection point 22 and/or at least one channel 18, a corresponding punching process can create the outlines of the membrane 12 and/or punch out the later channel zone 18. As a result of the punching process, the membrane 12 is separated from the surrounding film in such a way that both are only connected to one another through the at least one connection point 22. The surrounding film 20 with the membrane 12 connected by the connection point 22 is firmly connected to the base film 10. As already described, the connection can preferably be made with a corresponding welded connection. Examples of possible welding processes include: hot air welding, thermal contact welding, induction, cold welding and ultrasonic welding (possibly others). Alternatively, other connection methods such as gluing etc. are also possible.

Anschließend wird die Rahmenfolie 13 auf der umliegenden Folie 20 aufgebracht. Dabei kommt der freie Bereich 17 oberhalb der Membran 12 zu liegen. Dadurch wird ein Abheben der Membran 12 in den freien Bereich 17 hinein möglich. Zuvor wird der freie Bereich 17 aus der Rahmenfolie 13 ausgestanzt. Die aufgebrachte Rahmenfolie 13 wird mit der umliegenden Folie 20 verbunden. Dies kann wie bereits beschrieben bevorzugt mit einer entsprechenden Schweißverbindung erfolgen. Alternativ werden jedoch auch sonstige Verbindungsverfahren wie Kleben möglich. Wichtig ist, dass lediglich die umliegende Folie 20 mit der Rahmenfolie 13 verbunden wird, nicht jedoch die Membran 12. Die freie Beweglichkeit der Membran 12, die lediglich über zumindest eine Verbindungsstelle 22 beweglich gehalten ist, wird dadurch sichergestellt.The frame film 13 is then applied to the surrounding film 20. The free area 17 comes to lie above the membrane 12. This makes it possible for the membrane 12 to be lifted off into the free area 17. Beforehand, the free area 17 is punched out of the frame film 13. The applied frame film 13 is connected to the surrounding film 20 connected. As already described, this can preferably be done with a corresponding welded connection. Alternatively, other connection methods such as gluing are also possible. It is important that only the surrounding film 20 is connected to the frame film 13, but not the membrane 12. The free mobility of the membrane 12, which is only held movably via at least one connection point 22, is thereby ensured.

Anschließend kann die Deckfolie 15 auf die Rahmenfolie 13 aufgebracht werden. Anschließend wird die Deckfolie 15 mit der Rahmenfolie 13 verbunden. Dies kann wie bereits beschrieben bevorzugt mit einer entsprechenden Schweißverbindung erfolgen. Alternativ werden jedoch auch sonstige Verbindungsverfahren wie Kleben möglich. Beispielsweise für innenliegende Ventile 8, die ohne Deckfolie 15 auskommen, könnte dieser Schritt auch entfallen.The cover film 15 can then be applied to the frame film 13. The cover film 15 is then connected to the frame film 13. As already described, this can preferably be done with a corresponding welded connection. Alternatively, other connection methods such as gluing are also possible. For example, for internal valves 8 that do not require a cover film 15, this step could also be omitted.

Das Vereinzeln der Ventile 8, die auf einer Folienbahn zusammenhängend angeordnet sind, kann in der Verpackungsmaschine, insbesondere durch den Applikator beschrieben erfolgen. Alternativ könnte die Vereinzelung auch direkt nach dem Zusammenfügen der Folien 10, 13, 15, 20 erfolgen.The isolation of the valves 8, which are arranged contiguously on a film web, can take place in the packaging machine, in particular as described by the applicator. Alternatively, the separation could also take place directly after the foils 10, 13, 15, 20 have been joined together.

Die beschriebenen Ventile 8 werden beispielsweise als Aromaschutzventile bei Verpackungen von ausgasenden Produkten wie beispielsweise Kaffeebohnen, Mahlkaffee, Frischteig oder Ähnliches verwendet, bei denen ein Überdruck nach dem Abpacken in der Verpackung durch ausgasende Füllgüter entsteht. Ein Druckabbau erfolgt durch ein Anheben der Membran 12 relativ zu der Öffnung 11 bzw. der Grundfolie 10 und anschließendes Entweichen über den freien Bereich 17 bzw. - im Falle von einem außenliegenden Ventil - über zumindest einen mit dem freien Bereich 17 in Verbindung stehenden seitlichen Kanal 18, der zwischen Rahmenfolie 13 und Deckfolie 15 ausgebildet ist.The valves 8 described are used, for example, as aroma protection valves in packaging of outgassing products such as coffee beans, ground coffee, fresh dough or the like, in which excess pressure is created after packaging in the packaging due to outgassing filling goods. Pressure is reduced by raising the membrane 12 relative to the opening 11 or the base film 10 and then escaping via the free area 17 or - in the case of an external valve - via at least one side channel connected to the free area 17 18, which is formed between frame film 13 and cover film 15.

Claims (9)

  1. Valve for a packaging container, comprising
    at least one base film (10) with an opening (11),
    at least one frame film (13) encompassing a free region (17),
    and at least one membrane (12) which is arranged on the base film (10) and covers the opening (11),
    wherein a fluid is provided between the membrane (12) and the base film (10), wherein the membrane (12) is connected to a surrounding film (20) via at least one connection region (22),
    wherein the surrounding film (20) is connected on one side to the base film (10) and on its other side to the frame film (13), and
    the membrane (12) is arranged movably within the free region (17),
    characterised in that the surrounding film (20) is open at least in one point, such that a channel (18) is formed.
  2. Device according to claim 1,
    characterised in that the connection region (22) is arranged opposite the channel (18).
  3. Device according to one of the preceding claims,
    characterised in that the surrounding film (20) encompasses the membrane (12) at least partially in a circular shape or in a U shape.
  4. Device according to one of the preceding claims,
    characterised in that the membrane (12) is formed in a circular shape.
  5. Device according to one of the preceding claims,
    characterised in that the base film (10), the frame film (13) and the membrane (12) are equally usable and/or arrangeable within a packaging container or outside a packaging container.
  6. Device according to one of the preceding claims,
    characterised in that the thickness of the frame film (13) is greater than the thickness of the membrane (12), preferably greater by 75 % to 225 %.
  7. Device according to one of the preceding claims,
    characterised in that at least one cover film (15) is provided, which is connected to the frame film (13).
  8. Device according to one of the preceding claims,
    characterised in that the base film (10) and/or the frame film (13) and/or the cover film (15) are/is implemented of polypropylene, PP-EVOH-PP, OPP, PET, polyolefin or of a synthetic material, preferably of sustainable raw materials or of bio-degradable synthetic materials.
  9. Device according to one of the preceding claims,
    characterised in that the frame film (13) is connected to the base film (10) and/or to the cover film (15) via a welding connection, in particular laminated.
EP20776108.1A 2019-09-19 2020-09-18 Valve for a packaging container Active EP4031460B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019214317.2A DE102019214317A1 (en) 2019-09-19 2019-09-19 Valve for a packaging container and method for its manufacture
PCT/EP2020/076115 WO2021053150A1 (en) 2019-09-19 2020-09-18 Valve for a packaging container

Publications (2)

Publication Number Publication Date
EP4031460A1 EP4031460A1 (en) 2022-07-27
EP4031460B1 true EP4031460B1 (en) 2023-12-27

Family

ID=72615843

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20776108.1A Active EP4031460B1 (en) 2019-09-19 2020-09-18 Valve for a packaging container

Country Status (5)

Country Link
US (1) US11939133B2 (en)
EP (1) EP4031460B1 (en)
JP (1) JP7255023B2 (en)
DE (1) DE102019214317A1 (en)
WO (1) WO2021053150A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022117642A1 (en) 2022-07-14 2024-01-25 Syntegon Technology Gmbh Method for producing at least one aroma protection valve and aroma protection valve

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1416771A (en) * 1920-08-18 1922-05-23 Henry B Babson Valve
US2856955A (en) * 1955-08-02 1958-10-21 Winkelman James Valve structure for aerators or the like
US5048846A (en) * 1988-09-12 1991-09-17 Fujimori Kogyo Co., Ltd. Method for sealing gas release valve
JP2754751B2 (en) 1989-06-20 1998-05-20 藤森工業株式会社 Degassing valve
DE4243020A1 (en) 1992-12-18 1994-06-30 Bosch Gmbh Robert Pressure relief valve for packaging containers
DE19510489A1 (en) 1995-03-27 1996-10-02 Bosch Gmbh Robert Pressure relief valve for a packaging container
US6662827B1 (en) * 2002-07-15 2003-12-16 Sonoco Development, Inc. Overpressure relief valve for packaging container
DE102009000802A1 (en) 2009-02-12 2010-08-19 Robert Bosch Gmbh Pressure relief valve for a packaging container
US20120243807A1 (en) * 2011-03-25 2012-09-27 Pascoe Gregory A Gas exhaust valve for packages
US8602062B2 (en) * 2011-06-11 2013-12-10 Robert Asher Eiermann Compact reed valve
CA2829452C (en) * 2012-10-09 2017-05-30 Plitek, Llc Oil-less and wetted pressure relief valves having an integrated filter
US9199781B2 (en) * 2013-03-14 2015-12-01 Sonoco Development, Inc. Hermetic microwavable package with automatically opening steam vent
WO2015013497A1 (en) * 2013-07-26 2015-01-29 Barnes Group Inc. Multiple parts reed valve and method of manufacturing
US20150135967A1 (en) * 2013-11-21 2015-05-21 Plitek, L.L.C. Single-Serve Cartridge with Pressure Relief Valve
DE202014003567U1 (en) * 2014-04-30 2015-07-31 Neoperl Gmbh Flow regulator
KR101655281B1 (en) * 2014-11-07 2016-09-07 주식회사 프레스원 Gas discharge cap for package
WO2018006172A1 (en) 2016-07-06 2018-01-11 O2I Ltd. One-way valve
US10358275B1 (en) * 2017-06-16 2019-07-23 Plitek, L.L.C. Pressure relief valve with a plural-part dry strap

Also Published As

Publication number Publication date
JP2022550276A (en) 2022-12-01
WO2021053150A1 (en) 2021-03-25
JP7255023B2 (en) 2023-04-10
EP4031460A1 (en) 2022-07-27
DE102019214317A1 (en) 2021-03-25
US11939133B2 (en) 2024-03-26
US20220332490A1 (en) 2022-10-20

Similar Documents

Publication Publication Date Title
DE3935201C2 (en)
DE2505492C2 (en)
EP0200877B1 (en) Liquid package, and process and device for making such a package
DE3346351C2 (en)
WO2014139788A1 (en) Method and device for producing tubular bags
EP4031460B1 (en) Valve for a packaging container
DE102015201691A1 (en) Method and device for molding at least one bottom to a piece of hose
EP4228976B1 (en) Can lid and method of making a can lid
DE102011006930A1 (en) Welding apparatus for multi-layer plastic films, has welding plate having raised structure with cutting edge, which is arranged between welding sonotrode and counter tool
DE102019214316A1 (en) Method for producing a valve, in particular a pressure relief valve for a packaging container
DE4411925A1 (en) Method for covering a cut edge of an opening of a container with a protective cover
EP4031459B1 (en) Valve for a packaging container
EP1205393A2 (en) Can end
DE102017222950A1 (en) Housing for a gas bag of a vehicle occupant restraint system of a motor vehicle, forming device and method for producing such a housing
EP2595751A1 (en) Microfluidic device and method for producing same
WO2010130361A1 (en) Can, method for producing a closure unit for a can, and device for producing such a closure unit
EP3835035A1 (en) Method for joining workpieces and assembled article
EP4309880A1 (en) Method for producing at least one aroma protection valve and aroma protection valve
DE102005003674B4 (en) Metallic flat gasket
DE202020104895U1 (en) Sealing corner part provided for forming a sealing corner
WO2012167781A1 (en) Method for producing tubular packaging
DE20317973U1 (en) Thermal forming unit for producing beaker shaped containers, comprises primary and secondary moulding tools and a perforating needle located in a holding unit
DE102018101864A1 (en) Packaging and process for its production
DE102016217927A1 (en) Material carrier, method for producing a material carrier for a structural component and method for producing a structural component for a motor vehicle
WO1995027657A1 (en) Packaging container for free-flowing materials, and method and device for manufacturing the container

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20220419

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20230726

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502020006540

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240328

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG9D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231227

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231227

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231227

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240328

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231227

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231227

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240327

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20231227

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231227

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231227

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231227

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231227

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231227

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240427

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231227

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231227

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231227

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231227

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231227

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240427

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231227

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231227

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231227

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240429

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240429

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231227