EP3686124B1 - Soupape de surpression résistante au vide pour récipients d'emballage - Google Patents

Soupape de surpression résistante au vide pour récipients d'emballage Download PDF

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Publication number
EP3686124B1
EP3686124B1 EP19197908.7A EP19197908A EP3686124B1 EP 3686124 B1 EP3686124 B1 EP 3686124B1 EP 19197908 A EP19197908 A EP 19197908A EP 3686124 B1 EP3686124 B1 EP 3686124B1
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EP
European Patent Office
Prior art keywords
sealing zone
sealing
relief valve
pressure relief
base body
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
EP19197908.7A
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German (de)
English (en)
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EP3686124A1 (fr
Inventor
Jenny Haase
Hans-Peter Stadel
Herbert Stotkiewitz
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 EP3686124A1 publication Critical patent/EP3686124A1/fr
Application granted granted Critical
Publication of EP3686124B1 publication Critical patent/EP3686124B1/fr
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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

Definitions

  • the present invention relates to a pressure relief valve of a packaging container and a packaging container.
  • the use of pressure relief valves in packaging containers which are used for packaging a product is known.
  • the overpressure valve can be used to discharge gases generated within the packaging from the packaging container.
  • the necessity of such a possibility of a gas escape from the packaging container arises, for example, in the case of a product which still outgases after packaging and can thus generate an overpressure in the packaging container.
  • the ingress of air, in particular of the oxygen present in the air must be avoided at the same time in order to maintain the quality of the filling material.
  • a pressure relief valve used for this is shown, for example, in EP 2 396 244 B1 .
  • the overpressure valve according to the invention of a packaging container with the features of claim 1 offers the advantage of an improved sealing of the packaging container. Above all, reliable sealing of the packaging container in the event of a vacuum or a strong negative pressure in the interior of the packaging container from the environment is possible.
  • the pressure relief valve according to the invention By means of the pressure relief valve according to the invention, a deep negative pressure can be maintained in the packaging container for a particularly long period of time.
  • the pressure relief valve comprises a base body, at least one passage opening, a membrane and a fluid.
  • the base body is designed in particular concentric to a central axis.
  • the passage opening extends completely through the base body and enables gas to pass through the base body.
  • the membrane is arranged over the passage opening and covers it completely.
  • the fluid is applied to the base body and arranged between the membrane and the base body.
  • the fluid causes the membrane to be held on the base body by adhesion.
  • the fluid is evenly distributed between the base body and the membrane.
  • the membrane is formed in particular from a flexible material.
  • the base body has a first sealing area, a second sealing area and a third sealing area.
  • Each of these three sealing areas is designed to be circumferentially closed.
  • the second sealing area is arranged radially inside the third sealing area and the first sealing area is arranged radially inside the second sealing area.
  • the radial direction is considered with respect to the central axis of the base body.
  • the at least one through opening is arranged in the radial direction between the first sealing area and the second sealing area.
  • the first sealing area, the second sealing area and the third sealing area are each covered by the membrane.
  • the vacuum in the interior of the packaging container can be kept particularly reliably over a long period of time by the design of the pressure relief valve according to the invention in a sealed state of the pressure relief valve.
  • the sealing state describes a state of the pressure relief valve when there is a vacuum or negative pressure in the interior of the packaging container, whereby gas cannot pass through the pressure relief valve.
  • the membrane In the sealed state, the membrane is placed against the first sealing area and the second sealing area and thus prevents the Through opening gas can penetrate into the interior of the packaging container by a possible passage from the environment to the through opening is completely closed by the membrane.
  • the greater the pressure difference across the pressure relief valve the more the membrane is pressed against the first sealing area and the second sealing area, which further intensifies the sealing effect.
  • the membrane can lift slightly from the first sealing area and the second sealing area.
  • the membrane continues to be held on the base body, at least until a pressure inside the packaging container has reached the level of the pressure in the surroundings.
  • the interaction of the membrane and fluid also prevents air from the environment from entering the packaging container.
  • Such a state of equilibrium in which the pressure inside the packaging container is approximately equal to the pressure in the surroundings, is also referred to as a state of rest. In the idle state, there is thus a certain distance between the membrane and the first sealing area and the second sealing area in each case.
  • the pressure relief valve enables gases to escape from the packaging container, so that an excess pressure in relation to the environment is reduced.
  • a gas channel is formed in the fluid, which extends from the passage opening through the fluid and slightly lifts the membrane. The gas can flow out to the environment through this gas channel, which brings about a pressure equalization.
  • the adhesive force of the fluid pulls the first membrane back in the direction of the sealing areas and closes the gas channel so that the pressure relief valve closes again in a sealing manner.
  • exactly two through openings are provided which are opposite one another with respect to a central axis of the base body.
  • the first sealing area, the second sealing area and the third sealing area are preferably each designed in an annular manner. Furthermore, the three sealing areas are each designed concentrically to one another. It is particularly advantageous if the three sealing areas are each configured concentrically to the central axis of the base body. This not only results in a particularly easy-to-produce geometry of the base body, but also a particularly favorable, symmetrical application of the membrane to the sealing areas in the sealing state, which has a particularly advantageous effect on good and reliable sealing of the pressure relief valve.
  • the first sealing area is particularly preferably formed in the form of a circular ring surface. That is, the first sealing area forms a sealing surface in the form of a circular ring, against which the membrane can be placed.
  • the circular ring surface lies in particular in a plane which is perpendicular to the central axis of the base body. In particular when the membrane has a certain flexibility, surface contact is thus established between the first sealing area and the membrane in the sealing state. As a result, a larger sealing surface is available to achieve an optimal sealing effect of the pressure relief valve.
  • the second sealing area is designed in the form of a circular line.
  • the second sealing area forms a sealing surface in the form of a circular line, against which the membrane can be placed.
  • the circular line lies in particular in a plane which is perpendicular to the central axis of the base body. In the sealed state, line contact is thus established between the second sealing area and the membrane.
  • a second sealing area formed in this way can be pressed slightly into the membrane by the contact pressure resulting from the pressure difference, whereby the pressure relief valve further enables a particularly good and reliable seal.
  • the first sealing area and the second sealing area are particularly preferably located on a common sealing plane.
  • the sealing plane is in particular perpendicular to the central axis of the base body.
  • the third sealing area is preferably formed in the form of a conical casing ring. A distance that is present between the third sealing area and the membrane in a state of rest increases in the radial inward direction. That is, the third sealing area is funnel-shaped and, when viewing the three sealing areas from above, has the deepest point on its radially inner side. Furthermore, the third sealing area is designed in such a way that it intersects the common sealing plane in which the first sealing area and the second sealing area are located. That is, the radially inner end of the third sealing area lies below the sealing plane. In particular, the third sealing area intersects the common sealing plane in such a way that a radially inner third of a surface of the third sealing area lies below the sealing plane.
  • the membrane does not rest on the radially inner end of the third sealing area, but on a sub-area of the third sealing area which is located radially further outward, in particular radially outside the radially inner third of the surface of the third sealing area.
  • the conical casing ring preferably has a conical casing base angle between 1 ° and 4 °.
  • the base angle of the conical surface is particularly preferably 2.57 °.
  • first circumferential recess is formed between the first sealing area and the second sealing area. Furthermore, there is a second sealing area between the second sealing area and the third sealing area circumferential recess formed.
  • the through opening opens into the first recess in particular.
  • first sealing area and the second sealing area are emphasized in a particularly concise manner in order to make it easier to apply the membrane in the sealing state to achieve a particularly good seal.
  • the first recess and the second recess can act as a reservoir for the fluid.
  • the first recess and the second recess each have a depth starting from the sealing plane. That is, the first recess and the second recess have an identical depth.
  • the conditions between the membrane and the two depressions are thus uniform, which promotes uniform application of the membrane to the first sealing area and the second sealing area in each case. It is particularly advantageous if the first recess and the second recess have an identical volume.
  • the second depression can advantageously have a volume content that is 5% to 10% smaller than that of the first depression.
  • a radially inner edge of the third sealing area is arranged at a distance from the common sealing plane.
  • the ratio of the distance to the depth of the two depressions is between 0.1 and 0.2.
  • the ratio is particularly preferably 0.15. Such proportions have a particularly favorable effect on optimal sealing and also on optimal opening and closing behavior of the pressure relief valve.
  • a third recess is preferably formed radially inside the first sealing area.
  • the third recess advantageously has a rectangular cross section when viewed in a radial section. That is, the third recess is designed in particular as a cylindrical blind hole centrally in the base body. Such a third recess can also serve as a reservoir for the fluid and further promote a defined application of the membrane to the first sealing area.
  • the base body is preferably an injection molded part.
  • the base body is particularly preferably formed from a plastic. This makes the main body special simple and inexpensive to manufacture, the geometry of the base body can be designed simply and flexibly.
  • the base body has a round cross-sectional shape.
  • the pressure relief valve is simple and inexpensive to manufacture and a uniform distribution of the fluid is promoted by the capillary effect.
  • the base body also has a peripheral edge area.
  • the edge area defines a receiving space of the base body, within which the membrane and the fluid are received.
  • the edge area can preferably be connected in a sealing manner to an inside of a wall of the packaging container.
  • the membrane has an outer diameter which essentially corresponds to an inner diameter of the edge region or is slightly smaller.
  • at least one hole is formed through which gas can flow from the surroundings into the receiving space and vice versa.
  • the edge area preferably has an annular projection protruding radially inward from the edge area.
  • the ring projection is arranged on a side of the membrane opposite the sealing areas.
  • the annular projection has an inner diameter which is smaller than the outer diameter of the membrane.
  • the invention also relates to a packaging container which comprises at least one pressure relief valve according to the invention.
  • the packaging container can be used, for example, for packaging food. It is particularly favorable if the packaging container is aroma protection packaging for coffee.
  • the packaging container with the pressure relief valve according to the invention enables products such as coffee, for example, to be packaged airtight and under vacuum, the vacuum inside the packaging being able to be maintained for a particularly long period of time.
  • an im Inside the packaging container due to outgassing of the products overpressure can be reliably compensated by means of the overpressure valve. Above all, the ingress of oxygen into the closed packaging container is reliably prevented by the pressure relief valve.
  • the Figures 1 and 2 show simplified schematic views of a pressure relief valve 1 according to a preferred exemplary embodiment of the invention.
  • the Figure 1 shows a plan view and the Figure 2 shows a sectional view II of the pressure relief valve 1.
  • the pressure relief valve 1 is connected to a wall 10 of a closed packaging container 100, for reasons of clarity in FIG Figure 1 the packaging container 100 and a membrane 6 of the pressure relief valve 1 are not shown and in the Figure 2 only a small section of the wall 10 of the packaging container 100 is shown. That
  • Pressure relief valve 1 is attached to a side 11 of wall 10 facing an interior I of packaging container 100.
  • the packaging container 100 can be used for packaging filling goods, such as foods of the most varied types.
  • a packaging container 100 is suitable as aroma protection packaging for coffee.
  • the overpressure valve 1 according to the invention prevents air from penetrating the interior I of the packaging container 100, with gases being able to escape from the interior I of the packaging container 100 to an environment U in the opposite direction.
  • Such a sealing of the packaging container 100 with the simultaneous possibility of equalizing an overpressure is particularly advantageously possible through the overpressure valve 1.
  • the pressure relief valve 1 is suitable for maintaining a vacuum or a strong negative pressure in the interior space I of the packaging container 100 over a long period of time.
  • the overpressure valve 1 allows gases to escape from the interior I of the packaging container 100 to the environment U.
  • the pressure relief valve 1 comprises a base body 2 and a membrane 6.
  • the base body 2 is cup-shaped and is essentially concentric with a central axis 25.
  • the base body 2 has a base area 20 which is adjoined by an annular edge area 3. At an end opposite the base area 20, the edge area 3 is connected to the wall 10 of the packaging container 100.
  • the connection between edge area 3 and wall 10 is an ultrasonic connection.
  • a receiving space R of the base body 2 is thus enclosed by the base area 20, the edge area 3 and the wall 10.
  • the membrane 6 is arranged within the receiving space R.
  • the membrane 6 is designed as a circular foil disk made of a flexible material and has an outer diameter which corresponds to an inner diameter of the edge region 3.
  • the edge region 3 also has an annular projection 31 which protrudes radially inward. The annular projection 31 limits the mobility of the membrane 6 along the central axis 25.
  • the base body 2 also has a first sealing area 21, a second sealing area 22 and a third sealing area 23.
  • first sealing area 21, the second sealing area 22 and the third sealing area 23 are each ring-shaped and circumferentially closed and designed concentrically to one another.
  • the first sealing area 21 is designed in the form of an annular surface which lies in a sealing plane E.
  • the sealing plane E is arranged perpendicular to the central axis 25.
  • the second sealing area 22 is designed in the form of a circular line and is arranged radially outside the first sealing area 21.
  • the second sealing area 22 is also located in the sealing plane E.
  • the third sealing area 23 is formed in the form of a conical casing ring.
  • the third sealing area 23 intersects the sealing plane E.
  • a cone jacket base angle ⁇ between the cone jacket ring and the sealing plane E is 2.57 ° (cf. Figure 2 ).
  • a radially inner edge 230 of the third sealing region 23 is thereby arranged at a distance A below the sealing plane E.
  • a first circumferential recess 41 is also formed in the base body 2 between the first sealing area 21 and the second sealing area 22.
  • the first depression has the shape of a symmetrical trapezoid.
  • a second circumferential recess 42 is formed between the second sealing area 22 and the third sealing area 23 between the second sealing area 22 and the third sealing area 23, a second circumferential recess 42 is formed.
  • the second recess 42 has the shape of a trapezoid in cross section.
  • the first recess 41 and the second recess 42 each have a depth T starting from the sealing plane E. A ratio of the distance A to the depth T is 0.15.
  • a third recess 43 is formed radially inside the first sealing area 21.
  • the third recess 43 viewed in cross section, has the shape of a rectangle or, since it is arranged centrally, is designed as a blind hole.
  • the Figure 4 shows a detail of a further sectional view II-II of the pressure relief valve of FIG Figure 1 .
  • two through openings 51, 52 are formed in the base body 2, each of which extends through the base region 20 of the base body 2 and is arranged essentially parallel to the central axis 25.
  • the two through openings 51, 52 are each arranged between the first sealing area 21 and the second sealing area 22 and each open into the first recess 41 the top view in Figure 1 to see.
  • the two passage openings 51, 52 are trumpet-shaped in cross-section, which has a particularly favorable effect on the one hand on the manufacture of the base body 2 and on the other hand on the flow conditions when gas flows out.
  • the through openings 51, 52 taper in the direction of the membrane 6.
  • the membrane 6 is held on the base region 20 by means of the fluid 8. Due to the capillary effect, the fluid 8 is evenly distributed between the membrane 6 and the base area 20. The fluid 8 ensures through adhesion between that the membrane 6 is held on the base area 20 by means of an adhesive force.
  • the Figures 2 and 3 show a state of rest of the pressure relief valve 1, that is, when the pressure between the interior I and the environment U is essentially the same and thus no force is exerted on the membrane 6.
  • the membrane 6 In this idle state, the membrane 6 is undeformed and thus completely parallel to the sealing plane E.
  • the fluid 8 prevents air from penetrating into the interior I from the environment U.
  • the Figure 4 shows a sealing state of the pressure relief valve 1.
  • This sealing state is present when there is a pressure gradient between the environment U and the interior space I, that is, when there is a vacuum or at least a negative pressure in relation to the environment U in the interior space I.
  • This pressure gradient causes a force on the membrane 6 which presses the membrane 6 in the direction of the sealing areas 21, 22, 23.
  • the membrane 6 is applied to all three sealing areas 21, 22, 23.
  • the second sealing area 22 and the membrane touch one another linearly.
  • the sealing area 23 and the membrane 6 do not touch in the area of the edge 230, but only radially further outside from the contact point 231
  • This contact point 231 lies outside the radially inner third of the surface of the third sealing area 23.
  • This enables the membrane 6 to be pressed strongly against the first sealing area 21 and the second sealing area 22 in order to achieve particularly good and reliable sealing of the through openings 51, 52 to ensure.
  • the membrane 6 is made of a material with a certain flexibility, the first sealing area 21 and the second sealing area 22 can be pressed slightly into the membrane 6, which further promotes a particularly high sealing effect.
  • the penetration of air into the interior I of the packaging container 100 is prevented in a particularly efficient manner, since the membrane 6 of the pressure relief valve 1 closes the passage openings 51, 52 particularly well due to the special design of the sealing areas 21, 22, 23.
  • the pressure relief valve 1 By means of the pressure relief valve 1, the vacuum in the interior space I of the packaging container 100 can thus be maintained over a particularly long period of time.
  • a vacuum in the interior I of the packaging container 100 can be broken.
  • an overpressure in the interior I compared to the environment U can still occur. If there is such an overpressure in the interior space I, the resulting gas can flow out through the overpressure valve 1 to the environment U.
  • a gas channel is formed in the overpressure valve 1, which extends from one or both of the passage openings 51, 52 through the fluid 8 and thereby lifts the membrane 6 slightly at its edge. The gas can flow out to the surroundings U through this gas channel and via the holes 12, 13 in the packaging, whereby a pressure equalization is brought about.

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

Claims (15)

  1. Soupape de surpression d'un récipient d'emballage, comprenant :
    - un corps de base (2),
    - au moins une aperture de passage (51) s'étendant à travers le corps de base (2),
    - une membrane (6) disposé au-dessus de l'au moins une aperture de passage (51), et
    - un fluide (8) appliqué sur le corps de base (2), le fluide (8) étant disposé entre la membrane (6) et le corps de base (2),
    - où le corps de base (2) comprend une première zone d'étanchéité (21), une deuxième zone d'étanchéité (22) et une troisième zone d'étanchéité (23),
    - où la première zone d'étanchéité (21), la deuxième zone d'étanchéité (22) et la troisième zone d'étanchéité (23) sont respectivement implémentées circonférentiellement fermées,
    - où la deuxième zone d'étanchéité (22) est disposée radialement dans la troisième zone d'étanchéité (23),
    - où la première zone d'étanchéité (21) est disposée radialement dans la deuxième zone d'étanchéité (22),
    - où la membrane (6) recouvre la première zone d'étanchéité (21), la deuxième zone d'étanchéité (22) et la troisième zone d'étanchéité (23),
    caractérisée en ce que
    l'au moins une aperture de passage (51) est disposée entre la première zone d'étanchéité (21) et la deuxième zone d'étanchéité (22).
  2. Soupape de surpression selon la revendication 1,
    où la première zone d'étanchéité (21), la deuxième zone d'étanchéité (22) et la troisième zone d'étanchéité (23) sont respectivement implémentées en forme d'anneau et concentriquement l'une aux autres.
  3. Soupape de surpression selon l'une des revendications précédentes, où la première zone d'étanchéité (21) est réalisée en forme d'une surface d'anneau de cercle.
  4. Soupape de surpression selon l'une des revendications précédentes, où la deuxième zone d'étanchéité (22) est réalisée en forme d'une ligne circulaire.
  5. Soupape de surpression selon l'une des revendications précédentes, où la première zone d'étanchéité (21) et la deuxième zone d'étanchéité (22) sont respectivement situées dans un plan qui est perpendiculaire à un axe central (25) du corps de base (2), et sont en particulier situées dans un plan d'étanchéité commun (E).
  6. Soupape de surpression selon la revendication 5,
    où la troisième zone d'étanchéité (23) est réalisée en forme d'un anneau d'enveloppe de cône, de sorte qu'une distance (A) entre la troisième zone d'étanchéité (23) et la membrane (6) croisse radialement vers l'intérieur en état de repos, et
    où la troisième zone d'étanchéité (23) s'intersecte avec le plan d'étanchéité (E).
  7. Soupape de surpression selon la revendication 6,
    où l'anneau d'enveloppe de cône présente un angle de base de l'enveloppe de cône (α) entre 1° et 4°, en particulier 2,57°, par rapport au plan d'étanchéité (E).
  8. Soupape de surpression selon l'une des revendications 5 à 7,
    où un premier enfoncement circonférentiel (41) est formé entre la première zone d'étanchéité (21) et la deuxième zone d'étanchéité (22), et
    où un deuxième enfoncement circonférentiel (42) est formé entre la deuxième zone d'étanchéité (22) et la troisième zone d'étanchéité (23).
  9. Soupape de surpression selon la revendication 8,
    où le premier enfoncement (41) et le deuxième enfoncement (42), sortant du plan d'étanchéité (E), respectivement ont une profondeur (T).
  10. Soupape de surpression selon la revendication 9,
    où un bord radialement intérieur (230) de la troisième zone d'étanchéité (23) est disposé ayant une distance (A) du plan d'étanchéité (E), et
    où un rapport de la distance (A) à la profondeur (T) est entre 0,1 et 0,2, en particulier 0,15.
  11. Soupape de surpression selon l'une des revendications précédentes,
    où un troisième enfoncement (43) est formé radialement dans la première zone d'étanchéité (23), et
    où le troisième enfoncement (23), en particulier vu dans une coupe radiale, présente une coupe transversale rectangulaire.
  12. Soupape de surpression selon l'une des revendications précédentes,
    où le corps de base (2) est une pièce de moulage par injection et est en particulier formé d'un matériau synthétique.
  13. Soupape de surpression selon l'une des revendications précédentes,
    où le corps de base (2) en outre comprend une zone marginale circonférentielle (3) définissant un espace recevant (R) sur le corps de base (2).
  14. Soupape de surpression selon la revendication 13,
    où la zone marginale (3) comprend une saillie annulaire (31) qui saille de la zone marginale (3) radialement vers l'intérieur.
  15. Récipient d'emballage comprenant au moins une soupape de surpression (1) selon l'une des revendications précédentes.
EP19197908.7A 2019-01-24 2019-09-18 Soupape de surpression résistante au vide pour récipients d'emballage Active EP3686124B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019200867.4A DE102019200867A1 (de) 2019-01-24 2019-01-24 Vakuumfestes Überdruckventil für Verpackungsbehälter

Publications (2)

Publication Number Publication Date
EP3686124A1 EP3686124A1 (fr) 2020-07-29
EP3686124B1 true EP3686124B1 (fr) 2021-11-24

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ID=67997408

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19197908.7A Active EP3686124B1 (fr) 2019-01-24 2019-09-18 Soupape de surpression résistante au vide pour récipients d'emballage

Country Status (3)

Country Link
US (1) US11505388B2 (fr)
EP (1) EP3686124B1 (fr)
DE (1) DE102019200867A1 (fr)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2223944A (en) * 1937-03-26 1940-12-03 Albert E Roy Check valve
DE2549855A1 (de) * 1975-11-06 1977-09-22 Wipf Ag Ueberdruckventil, insbesondere fuer flexible verpackungsbehaelter
DE2603712A1 (de) * 1976-01-31 1977-08-04 Robert & Bosch Gmbh Ueberdruckventil fuer einen verpackungsbehaelter
CH640474A5 (de) * 1981-01-07 1984-01-13 Sig Schweiz Industrieges Ueberdruckventil fuer einen gasdicht verschlossenen verpackungsbeutel und verfahren zu dessen einbau.
DE3125496C2 (de) * 1981-06-29 1983-12-29 Wipf AG Verpackungen, 8404 Volketswil Überdruckventil zur Entlüftung von Verpackungen
DE19843430A1 (de) * 1998-09-22 2000-03-23 Wipf Ag Volketswil Staubdichter Beutel für feinpulvrige Produkte
DE10250318A1 (de) * 2002-10-29 2004-05-19 Robert Bosch Gmbh Überdruckventil für einen Verpackungsbehälter
DE102004062026A1 (de) * 2004-09-29 2006-03-30 Robert Bosch Gmbh Überdruckventil für einen Verpackungsbehälter
DE102009000806A1 (de) * 2009-02-12 2010-08-19 Robert Bosch Gmbh Überdruckventil mit kleinen Abmessungen
DE102009000802A1 (de) 2009-02-12 2010-08-19 Robert Bosch Gmbh Überdruckventil für einen Verpackungsbehälter

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Publication number Publication date
US20200239213A1 (en) 2020-07-30
DE102019200867A1 (de) 2020-07-30
EP3686124A1 (fr) 2020-07-29
US11505388B2 (en) 2022-11-22

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