EP4031460B1 - Ventil für einen verpackungsbehälter - Google Patents

Ventil für einen verpackungsbehälter Download PDF

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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)
English (en)
French (fr)
Other versions
EP4031460A1 (de
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/de
Application granted granted Critical
Publication of EP4031460B1 publication Critical patent/EP4031460B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • 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)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Bag Frames (AREA)
EP20776108.1A 2019-09-19 2020-09-18 Ventil für einen verpackungsbehälter Active EP4031460B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019214317.2A DE102019214317A1 (de) 2019-09-19 2019-09-19 Ventil für einen Verpackungsbehälter und Verfahren zu dessen Herstellung
PCT/EP2020/076115 WO2021053150A1 (de) 2019-09-19 2020-09-18 Ventil für einen verpackungsbehälter

Publications (2)

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

Family

ID=72615843

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20776108.1A Active EP4031460B1 (de) 2019-09-19 2020-09-18 Ventil für einen verpackungsbehälter

Country Status (5)

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

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022117642A1 (de) 2022-07-14 2024-01-25 Syntegon Technology Gmbh Verfahren zur Herstellung zumindest eines Aromaschutzventils sowie Aromaschutzventil

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 (ja) 1989-06-20 1998-05-20 藤森工業株式会社 ガス抜き用弁
DE4243020A1 (de) 1992-12-18 1994-06-30 Bosch Gmbh Robert Überdruckventil für Verpackungsbehälter
DE19510489A1 (de) 1995-03-27 1996-10-02 Bosch Gmbh Robert Überdruckventil für einen Verpackungsbehälter
US6662827B1 (en) 2002-07-15 2003-12-16 Sonoco Development, Inc. Overpressure relief valve for packaging container
DE102009000802A1 (de) 2009-02-12 2010-08-19 Robert Bosch Gmbh Überdruckventil für einen Verpackungsbehälter
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
EP2719637B1 (en) * 2012-10-09 2016-08-24 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
MX369901B (es) * 2013-07-26 2019-11-22 Barnes Group Inc Valvula reed de multiples partes y metodo de fabricacion.
US20150135967A1 (en) * 2013-11-21 2015-05-21 Plitek, L.L.C. Single-Serve Cartridge with Pressure Relief Valve
DE202014003567U1 (de) * 2014-04-30 2015-07-31 Neoperl Gmbh Durchflussmengenregler
KR101655281B1 (ko) * 2014-11-07 2016-09-07 주식회사 프레스원 포장 패키지용 가스 배출캡
CA3028271A1 (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
US11939133B2 (en) 2024-03-26
DE102019214317A1 (de) 2021-03-25
EP4031460A1 (de) 2022-07-27
JP7255023B2 (ja) 2023-04-10
US20220332490A1 (en) 2022-10-20
JP2022550276A (ja) 2022-12-01
WO2021053150A1 (de) 2021-03-25

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