EP0024310A1 - Packaging container with pressure relief valve - Google Patents

Packaging container with pressure relief valve Download PDF

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Publication number
EP0024310A1
EP0024310A1 EP80104317A EP80104317A EP0024310A1 EP 0024310 A1 EP0024310 A1 EP 0024310A1 EP 80104317 A EP80104317 A EP 80104317A EP 80104317 A EP80104317 A EP 80104317A EP 0024310 A1 EP0024310 A1 EP 0024310A1
Authority
EP
European Patent Office
Prior art keywords
slot
packaging container
relief valve
pressure relief
wall
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.)
Granted
Application number
EP80104317A
Other languages
German (de)
French (fr)
Other versions
EP0024310B1 (en
Inventor
Helmut Weigold
Hans Klappenecker
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to AT80104317T priority Critical patent/ATE3524T1/en
Publication of EP0024310A1 publication Critical patent/EP0024310A1/en
Application granted granted Critical
Publication of EP0024310B1 publication Critical patent/EP0024310B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/18—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient
    • B65D81/20—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas
    • 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 invention relates to a packaging container according to the preamble of the main claim.
  • a packaging container is known from DE-OS 25 37 317, in which, in order to avoid bursting of the sealed container, gas emitted by the filling material, for example coffee, through one or more openings in the wall of the container and through the latter covering it Pressure relief valve can escape. Since such valves are very sensitive to dust and their function can be impaired by the contents of the filling material entrained in the escaping gas, the passage in the known container is designed in the form of several holes with a small cross section or with egg a piece of filter paper covered.
  • the packaging container according to the invention with the characterizing feature of the main claim has the advantage that the slot can be cut with a simple, bevelled, for example cylindrical stamp on its end face. It has a particularly advantageous effect that the flap delimited by the slot can spring back or be pushed back into the plane of the container wall, so that the width of the slot is less than 0.05 mm, but due to the length of the slot a sufficiently large passage cross section is given for escaping gas. As a result, the gas flow rate is low and the filter effect is very high.
  • the measures listed in the subclaims enable advantageous developments and improvements of the packaging container specified in the main claim.
  • the formation of the slot as a semicircular arc is particularly advantageous since the resilience of the cutting area is greatest in this shape.
  • FIG. 1 shows a bag pack in a diagrammatic representation
  • FIG. 2 shows part of the wall of the bag pack with a pressure relief valve in cross section in the plane II-II of FIG. 1 on an enlarged scale.
  • a bag.1 made of a flexible packaging material contains a gas-releasing material, for example ground coffee.
  • a gas-releasing material for example ground coffee.
  • the pressure relief valve 5 consists of a rigid base plate 6 with a perforation 7 in register with the opening 3 in the wall 2 and from a flexible membrane 8, which valve channels 9 is partially glued to the base plate 6.
  • the opening 3 in the wall 2 of the bag 1 has the shape of an arcuate slot 10, the gap width of which is less than 0.05 mm.
  • the slot 10 preferably has the shape of a semicircle with a radius of 1 to 2 mm.
  • the slot 10 is cut into the wall 2 of the bag with a cylindrical stamp with a beveled face.
  • the semicircular region bent out of the plane of the wall 2 springs back into the original position due to the restoring force of the packaging material, or is pressed back into the plane of the wall 2 by pressing means.
  • the slot 10 can be cut into the packaging material before removing a container is shaped, but it can also be attached to the container before it is filled.
  • the pressure relief valve 5 is glued to the outside of the bag 1 in register with the slot 10 after cutting the slot.
  • the slot is in the form of an arc of a circle which delimits a flap which, due to its continuous connection to the container wall, springs back into the plane of the wall after being cut free, so that the slot is very narrow. This is also achieved with, for example, an angular or undulating or, generally speaking, with a non-straight slot.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)
  • Bag Frames (AREA)
  • Closures For Containers (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)

Abstract

1. A packaging container made of flexible packaging material and having an escape opening (3) in its wall (2), an overpressure relief valve (5) is attached in alignement with the escape opening and closing the escape opening, characterized in that said escape opening (3) takes the form of a narrow slit (10), the shape of which is not a straight line.

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem Verpackungsbehälter nach der Gattung des Hauptanspruchs. Es ist durch die DE-OS 25 37 317 ein solcher Verpackungsbehälter bekannt, bei dem, um ein Platzen des dichten Behälters zu vermeiden, vom Füllgut, beispielsweise Kaffee, abgegebenes Gas durch eine oder mehrere Öffnungen in der Wand des Behälters und durch das diese abdeckende Überdruckventil entweichen kann. Da solche Ventile sehr staubempfindlich sind und durch in dem entweichenden Gas mitgeführte Füllgutteilchen in ihrer Funktion beeinträchtigt werden können, ist der Durchlaß bei dem bekannten Behälter in Form mehrerer Löcher mit geringem Querschnitt ausgebildet oder mit einem Filterpapierstück abgedeckt. Das Herstellen von Löchern in der Behälterwand mit einer Weite von etwa 0,05 mm, wie beispielsweise bei gemahlenem Kaffee erforderlich, ist beim Herstellen der Verpackungsbehälter auf einfache Weise und mit einfachen Mitteln kaum möglich. Auch das Abdecken der Durchlaßöffnung mit einem Filterpapierstück birgt Schwierigkeiten in sich.The invention relates to a packaging container according to the preamble of the main claim. Such a packaging container is known from DE-OS 25 37 317, in which, in order to avoid bursting of the sealed container, gas emitted by the filling material, for example coffee, through one or more openings in the wall of the container and through the latter covering it Pressure relief valve can escape. Since such valves are very sensitive to dust and their function can be impaired by the contents of the filling material entrained in the escaping gas, the passage in the known container is designed in the form of several holes with a small cross section or with egg a piece of filter paper covered. The production of holes in the container wall with a width of approximately 0.05 mm, as required, for example, in the case of ground coffee, is hardly possible in a simple manner and with simple means when producing the packaging containers. There are also difficulties in covering the passage opening with a piece of filter paper.

Vorteile der ErfindungAdvantages of the invention

Der erfindungsgemäße Verpackungsbehälter mit dem kennzeichnenden Merkmal des Hauptanspruchs hat demgegenüber den Vorteil, daß der Schlitz mit einem einfachen, an seiner Stirnseite abgeschrägten beispielsweise zylindrischen Stempel geschnitten werden kann. Besonders vorteilhaft wirkt sich dazu aus, daß die durch den Schlitz begrenzte Klappe in die Ebene der Behälterwand zurückfedert oder zurückgedrückt werden kann, so daß die Breite des Schlitzes kleiner ist als 0,05 mm, wobei durch die Länge des Schlitzes aber ein genügend großer Durchgangsquerschnitt für entweichendes Gas gegeben ist. Dadurch ist die Strömungsgeschwindigkeit des Gases gering und die Filterwirkung sehr hoch.The packaging container according to the invention with the characterizing feature of the main claim has the advantage that the slot can be cut with a simple, bevelled, for example cylindrical stamp on its end face. It has a particularly advantageous effect that the flap delimited by the slot can spring back or be pushed back into the plane of the container wall, so that the width of the slot is less than 0.05 mm, but due to the length of the slot a sufficiently large passage cross section is given for escaping gas. As a result, the gas flow rate is low and the filter effect is very high.

Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen des im Hauptanspruch angegebenen Verpackungsbehälters möglich. Besonders vorteilhaft ist die Ausbildung des Schlitzes als Halbkreisbogen, da bei dieser Form, die Rückfederung des Schnittbereichs am größten ist.The measures listed in the subclaims enable advantageous developments and improvements of the packaging container specified in the main claim. The formation of the slot as a semicircular arc is particularly advantageous since the resilience of the cutting area is greatest in this shape.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen Fig. 1 eine Beutelpackung in schaubildlicher Darstellung und Fig. 2 einen Teil der Wandung der Beutelpackung mit einem Überdruckventil im Querschnitt in der Ebene II-II der Fig. 1 in vergrößertem Maßstab.An embodiment of the invention is shown in the drawing and explained in more detail in the following description. 1 shows a bag pack in a diagrammatic representation and FIG. 2 shows part of the wall of the bag pack with a pressure relief valve in cross section in the plane II-II of FIG. 1 on an enlarged scale.

Beschreibung des AusführungsbeispielsDescription of the embodiment

Ein Beutel.1 aus einem flexiblen Packstoff enthält ein gasabgebendes Gut, beispielsweise gemahlenen Kaffee. Um ein Bombieren des dicht verschlossenen Beutels 1 zu verhindern, hat dieser in seiner vorderen Wand 2 eine Öffnung 3, die von einem aufgeklebten Überdruckventil 5 verschlossen ist. Das Überdruckventil 5 besteht aus einer starren Grundplatte 6 mit einer Lochung 7 in Deckung mit der Öffnung 3 in der Wand 2 und aus einer flexiblen Membrane 8, welche Ventilkanäle 9 belassend mit der Grundplatte 6 teilweise verklebt ist. Bei entstehendem Überdruck im Beutel 1 entweicht das Gas durch die Öffnung 3 in die Lochung 7 des Überdruckventils 5 und von dort durch die Ventilkanäle 9 ins Freie. Im Ruhezustand preßt der atmosphärische Luftdruck die Membrane 8 auf die Grundplatte 6, so daß die Ventilkanäle 9 geschlossen sind und so das Eindringen von Außenluft in den Beutel 1 verhindern.A bag.1 made of a flexible packaging material contains a gas-releasing material, for example ground coffee. In order to prevent the sealed bag 1 from bulging, it has an opening 3 in its front wall 2, which is closed by a pressure relief valve 5 which is glued on. The pressure relief valve 5 consists of a rigid base plate 6 with a perforation 7 in register with the opening 3 in the wall 2 and from a flexible membrane 8, which valve channels 9 is partially glued to the base plate 6. When excess pressure develops in the bag 1, the gas escapes through the opening 3 into the perforation 7 of the pressure relief valve 5 and from there through the valve channels 9 into the open. In the idle state, the atmospheric air pressure presses the membrane 8 onto the base plate 6, so that the valve channels 9 are closed and thus prevent outside air from entering the bag 1.

Die Öffnung 3 in der Wand 2 des Beutels 1 hat die Form eines bogenförmigen Schlitzes 10, dessen Spaltbreite kleiner als 0,05 mm ist. Vorzugsweise hat der Schlitz 10 die Form eines Halbkreises mit einem Radius von 1 bis 2 mm. Der Schlitz 10 wird in die Wand 2 des Beutels mit einem zylindrischen Stempel mit angeschrägter Stirnseite eingeschnitten. Der dabei aus der Ebene der Wand 2 herausgebogene Halbkreisbereich federt durch die Rückstellkraft des Packstoffes in die ursprüngliche Lage zurück, bzw. wird mit Andrückmitteln in die Ebene der Wand 2 zurückgedrückt. Der Schlitz 10 kann in den Packstoff geschnitten werden, bevor daraus ein Behälter geformt ist, er kann aber auch an dem Behälter vor dessen Befüllen angebracht werden. Das Überdruckventil 5 wird nach dem Schneiden des Schlitzes auf die Außenseite des Beutels 1 in Deckung mit dem Schlitz 10 geklebt.The opening 3 in the wall 2 of the bag 1 has the shape of an arcuate slot 10, the gap width of which is less than 0.05 mm. The slot 10 preferably has the shape of a semicircle with a radius of 1 to 2 mm. The slot 10 is cut into the wall 2 of the bag with a cylindrical stamp with a beveled face. The semicircular region bent out of the plane of the wall 2 springs back into the original position due to the restoring force of the packaging material, or is pressed back into the plane of the wall 2 by pressing means. The slot 10 can be cut into the packaging material before removing a container is shaped, but it can also be attached to the container before it is filled. The pressure relief valve 5 is glued to the outside of the bag 1 in register with the slot 10 after cutting the slot.

Bei dem beschriebenen Ausführungsbeispiel hat der Schlitz die Form eines Kreisbogens, der eine Klappe begrenzt, die durch ihre ununterbrochene Verbindung mit der Behälterwand nach dem Freischneiden wieder in die Ebene der Wand zurückfedert, so daß der Schlitz sehr eng ist. Dies wird auch bei einem beispielsweise winkel- oder wellenförmigen oder allgemein ausgedrückt, bei einem nichtgeradlinigen Schlitz erzielt.In the described embodiment, the slot is in the form of an arc of a circle which delimits a flap which, due to its continuous connection to the container wall, springs back into the plane of the wall after being cut free, so that the slot is very narrow. This is also achieved with, for example, an angular or undulating or, generally speaking, with a non-straight slot.

Claims (5)

1. Verpackungsbehälter mit einem Überdruckventil und mit einer Durchlaßöffnung in seiner Wand, die von dem Überdruckventil verschlossen ist, dadurch gekennzeichnet, daß die Durchlaßöffnung (3) die Form eines schmalen nichtgeradlinigen Schlitzes (10) hat.1. Packaging container with a pressure relief valve and with a passage opening in its wall, which is closed by the pressure relief valve, characterized in that the passage opening (3) has the shape of a narrow non-linear slot (10). 2. Verpackungsbehälter nach Anspruch 1, dadurch gekennzeichnet, daß der Schlitz (10) bogenförmig ist.2. Packaging container according to claim 1, characterized in that the slot (10) is arcuate. 3. Verpackungsbehälter nach Anspruch 2, dadurch gekennzeichnet, daß der Schlitz (10) die Form eines Halbkreisbogens hat.3. Packaging container according to claim 2, characterized in that the slot (10) has the shape of a semicircular arc. 4. Verpackungsbehälter nach Anspruch 1, dadurch gekennzeichnet, daß der Schlitz (10) winkelförmig ist.4. Packaging container according to claim 1, characterized in that the slot (10) is angular. 5. Verpackungsbehälter nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Spaltweite des Schlitzes (10) kleiner als 0,05 mm ist.5. Packaging container according to one of claims 1 to 4, characterized in that the gap width of the slot (10) is less than 0.05 mm.
EP80104317A 1979-08-16 1980-07-23 Packaging container with pressure relief valve Expired EP0024310B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80104317T ATE3524T1 (en) 1979-08-16 1980-07-23 PACKAGING CONTAINER WITH RELIEF VALVE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19792933151 DE2933151A1 (en) 1979-08-16 1979-08-16 PACKAGING CONTAINER WITH PRESSURE VALVE
DE2933151 1979-08-16

Publications (2)

Publication Number Publication Date
EP0024310A1 true EP0024310A1 (en) 1981-03-04
EP0024310B1 EP0024310B1 (en) 1983-05-25

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ID=6078577

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80104317A Expired EP0024310B1 (en) 1979-08-16 1980-07-23 Packaging container with pressure relief valve

Country Status (4)

Country Link
EP (1) EP0024310B1 (en)
JP (1) JPS6055376B2 (en)
AT (1) ATE3524T1 (en)
DE (2) DE2933151A1 (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0209729A2 (en) * 1985-07-25 1987-01-28 Robert Bosch Gmbh Packaging container with a vent valve
FR2649957A1 (en) * 1989-07-18 1991-01-25 Cafes Sa Cie Mediterraneenne PACKAGING FOR COFFEE BEANS FIXING DIRECTLY ON THE COFFEE MILL AND COMPRISING A DOSING FITTING PIPE
EP0499783A1 (en) * 1991-02-16 1992-08-26 Robert Bosch Gmbh Overpressure valve for packages
EP0710607A1 (en) 1994-11-03 1996-05-08 Robert Bosch Gmbh Packaging bag with pressure relief valve
EP0729901A1 (en) * 1995-03-23 1996-09-04 The Procter & Gamble Company Package or cap having a venting system with draining means
EP0752376A1 (en) * 1995-07-05 1997-01-08 The Procter & Gamble Company Container or cap with venting means
EP1630769A1 (en) * 2004-08-23 2006-03-01 Schreiner Group GmbH & Co. KG Label for covering gas exchange openings
US7490623B2 (en) 2004-10-07 2009-02-17 Celomat S.A. Pressure-relief one-way valve applicable to a package containing a gas-releasing product, wherein there coexist a fluid medium and an air bubble, and a package including said valve
US8636034B2 (en) 2011-08-31 2014-01-28 Plitek, L.L.C. Oil-less and wetted pressure relief valves having an integrated filter
US8783292B2 (en) 2011-08-31 2014-07-22 Plitek, L.L.C. Oil-less pressure relief valves
US9187229B2 (en) 2011-08-31 2015-11-17 Plitek, L.L.C. Oil-less pressure relief valves
US10358275B1 (en) 2017-06-16 2019-07-23 Plitek, L.L.C. Pressure relief valve with a plural-part dry strap
CN114864988A (en) * 2022-03-16 2022-08-05 四川华能氢能科技有限公司 Composite hydrogen fuel cell with explosion-proof structure

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6057069A (en) * 1983-09-05 1985-04-02 Fujimori Kogyo Kk Vent valve
JPS613216U (en) * 1984-06-11 1986-01-10 四国化工機株式会社 Containers for packaging acidic liquids
JPS62198338A (en) * 1986-02-26 1987-09-02 保土谷化学工業株式会社 Method and apparatus for injection of chemical liquid for controlling tree disease in pine tree
JPS6370916U (en) * 1986-10-27 1988-05-12
US5059036A (en) * 1990-04-27 1991-10-22 Kapak Corporation Vented pouch arrangement and method
US5254073A (en) 1990-04-27 1993-10-19 Kapak Corporation Method of making a vented pouch
JP2536036Y2 (en) * 1991-09-20 1997-05-21 日本エンビロ・システムズ株式会社 Sealed packaging bag
US5407087A (en) * 1992-12-30 1995-04-18 Lever Brothers Company, Division Of Conopco, Inc. Venting closure
US5709479A (en) * 1996-09-06 1998-01-20 Kapak Corp. Bag construction for distributing material
US5971613A (en) * 1997-04-11 1999-10-26 Kapak Corp. Bag constructions having inwardly directed side seal portions
US6375037B1 (en) 2000-10-10 2002-04-23 Kapak Corporation Bag construction for distributing material
DE102012200717B4 (en) * 2012-01-19 2021-09-23 Syntegon Technology Gmbh Closure for a packaging container
US11352183B2 (en) 2020-03-05 2022-06-07 Plitek, L.L.C. Pressure relief valve with wetting fluid reservoirs

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3716180A (en) * 1970-06-01 1973-02-13 Robalex Inc Packaging
DE2454248A1 (en) * 1974-11-15 1976-05-20 Hesser Ag Maschf Packing pressure relief valve - has rubber plate sealed to packing along edges and with central slot
DE2537317A1 (en) * 1975-08-21 1977-02-24 Hesser Ag Maschf PRESSURE COMPENSATING VALVE FOR A PACKAGING CONTAINER

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3716180A (en) * 1970-06-01 1973-02-13 Robalex Inc Packaging
DE2454248A1 (en) * 1974-11-15 1976-05-20 Hesser Ag Maschf Packing pressure relief valve - has rubber plate sealed to packing along edges and with central slot
DE2537317A1 (en) * 1975-08-21 1977-02-24 Hesser Ag Maschf PRESSURE COMPENSATING VALVE FOR A PACKAGING CONTAINER

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0209729A2 (en) * 1985-07-25 1987-01-28 Robert Bosch Gmbh Packaging container with a vent valve
EP0209729A3 (en) * 1985-07-25 1988-02-10 Robert Bosch Gmbh Packaging container with a vent valve
FR2649957A1 (en) * 1989-07-18 1991-01-25 Cafes Sa Cie Mediterraneenne PACKAGING FOR COFFEE BEANS FIXING DIRECTLY ON THE COFFEE MILL AND COMPRISING A DOSING FITTING PIPE
US5125542A (en) * 1989-07-18 1992-06-30 Compagnie Mediterraneenne Des Cafes S.A. Packaging for coffee beans securable directly on a coffee mill and comprising a connecting dispensing cap
EP0499783A1 (en) * 1991-02-16 1992-08-26 Robert Bosch Gmbh Overpressure valve for packages
US5263777A (en) * 1991-02-16 1993-11-23 Robert Bosch Gmbh Overpressure valve for packaging containers
EP0710607A1 (en) 1994-11-03 1996-05-08 Robert Bosch Gmbh Packaging bag with pressure relief valve
EP0729901A1 (en) * 1995-03-23 1996-09-04 The Procter & Gamble Company Package or cap having a venting system with draining means
EP0752376A1 (en) * 1995-07-05 1997-01-08 The Procter & Gamble Company Container or cap with venting means
EP1630769A1 (en) * 2004-08-23 2006-03-01 Schreiner Group GmbH & Co. KG Label for covering gas exchange openings
US7687135B2 (en) 2004-08-23 2010-03-30 Schreiner Group Gmbh & Co., Kg Label for covering gas exchange openings
US7490623B2 (en) 2004-10-07 2009-02-17 Celomat S.A. Pressure-relief one-way valve applicable to a package containing a gas-releasing product, wherein there coexist a fluid medium and an air bubble, and a package including said valve
US8636034B2 (en) 2011-08-31 2014-01-28 Plitek, L.L.C. Oil-less and wetted pressure relief valves having an integrated filter
US8783292B2 (en) 2011-08-31 2014-07-22 Plitek, L.L.C. Oil-less pressure relief valves
US9187229B2 (en) 2011-08-31 2015-11-17 Plitek, L.L.C. Oil-less pressure relief valves
US10358275B1 (en) 2017-06-16 2019-07-23 Plitek, L.L.C. Pressure relief valve with a plural-part dry strap
CN114864988A (en) * 2022-03-16 2022-08-05 四川华能氢能科技有限公司 Composite hydrogen fuel cell with explosion-proof structure

Also Published As

Publication number Publication date
DE3063476D1 (en) 1983-07-07
DE2933151A1 (en) 1981-02-26
JPS6055376B2 (en) 1985-12-04
JPS5632239A (en) 1981-04-01
ATE3524T1 (en) 1983-06-15
EP0024310B1 (en) 1983-05-25

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