EP0499783A1 - Valve de surpression pour emballages - Google Patents

Valve de surpression pour emballages Download PDF

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Publication number
EP0499783A1
EP0499783A1 EP19920100475 EP92100475A EP0499783A1 EP 0499783 A1 EP0499783 A1 EP 0499783A1 EP 19920100475 EP19920100475 EP 19920100475 EP 92100475 A EP92100475 A EP 92100475A EP 0499783 A1 EP0499783 A1 EP 0499783A1
Authority
EP
European Patent Office
Prior art keywords
adhesive
pressure relief
relief valve
adhesive strips
membrane
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
EP19920100475
Other languages
German (de)
English (en)
Other versions
EP0499783B1 (fr
Inventor
Klaus Dr.-Ing. Domke
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
Publication of EP0499783A1 publication Critical patent/EP0499783A1/fr
Application granted granted Critical
Publication of EP0499783B1 publication Critical patent/EP0499783B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • 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
    • Y10T137/8158—With indicator, register, recorder, alarm or inspection means

Definitions

  • the invention is based on a pressure relief valve for packaging containers according to the preamble of claim 1.
  • a valve of this type known for example from DE-OS 35 26 586
  • the adhesive strips which are arranged in the region of the edge zones of the membrane and which delimit the adhesive-free zone, a rectangular cross section with a thickness corresponding approximately to the thickness of the membrane.
  • cannulas are formed in the transition regions from the adhesive-free zone to the edge zones with the adhesive strips with the valve closed, that is, when the adhesive-free zone of the membrane lies sealingly on the congruent part of the packing wall.
  • the pressure relief valve according to the invention with the characterizing feature of claim 1 has the advantage that when the valve is closed, the elastic valve membrane with its adhesive-free zone also lies with its transition areas to the adhesive strips against the congruent part of the packing wall. Furthermore, the thick part of the adhesive strip on the edge has the effect that a wall of an adjacent pack in a multipack is supported on the raised edge zones of the membrane, which act as spacers, so that the overpressure-free central zone, which forms a channel, can bulge freely in the event of excess pressure occurring in the pack and thus the functionality of the pressure relief valve is given.
  • a check as to whether a pressure relief valve is arranged on a packaging container can easily be carried out with electromagnetic or optical control devices if the adhesive strips are equipped in accordance with the feature of claim 7.
  • a method for simple manufacture of the pressure relief valve according to claim 1 is characterized in claims 7 and 8.
  • FIG. 1 shows a bag pack with a pressure relief valve in a diagrammatic view
  • FIGS. 2 to 7 show different exemplary embodiments of the pressure relief valve in cross section on an enlarged scale, the thickness (height) of the parts being shown greatly enlarged in relation to the width.
  • the pressure relief valve 1 is arranged on a packaging container, for example on a gas-tight bag 2, and serves to discharge gases which are produced by the packaged product. It closes a plurality of holes 4 in the form of pinholes in a flat wall 3 of the bag 2.
  • the bag 2 is water-vapor and gas-tight and is suitable for holding air and moisture-sensitive food and beverages, in particular coffee.
  • the pressure relief valve 1 has a membrane 10 made of a transparent, flexible film.
  • the membrane 10 consists of a film made of a thermoplastic, for example polyester, polyethylene or the like, and has a thickness of 20 to 100 ⁇ m, preferably 50 ⁇ m.
  • the base film may also have a polyvinylidene chloride barrier.
  • the membrane 10 preferably has a square shape with an edge length of approximately 20 mm and rounded corners.
  • the membrane 10 is fastened with two strips 11, 12 made of an adhesive.
  • the adhesive strips 11, 12 are applied to the inside of the membrane 10 on two parallel edge zones 13, 14, so that an adhesive-free central zone 15 extends between them, which covers the holes 4 and extends parallel to the adhesive strips 11, 12 to the edges 16, 17 of the membrane extends, on which the adhesive strips 11, 12 also end. It is also conceivable that the adhesive-free zone ends only at one edge of the membrane.
  • the adhesive strips 11, 12 have the shape of a wedge, the pointed edge 18 of which delimits the adhesive-free middle zone 15 and the thick edge 19 of which is flush with the edge edges of the edge zones 13, 14 of the membrane 10.
  • the width of the adhesive strips 11, 12 is, for example, 4 to 5 mm and the width of the adhesive-free zone 15 of the membrane 10 is 8 to 10 mm.
  • the adhesive strips 11, 12 have a thickness that is approximately the same as the thickness of the membrane, namely in the size range from 20 to 100 ⁇ m, preferably 50 ⁇ m.
  • the adhesive of the strips 11, 12, which has pressure-sensitive adhesive properties, is preferably based on polyurethane.
  • the adhesive strips 11, 12 are applied to the membrane 10, preferably before it is cut out or separated from a film strip. They can be applied in the form of a wedge-shaped adhesive strand that is sprayed out of a nozzle. However, strands of different profiles can also be applied, which are then brought into wedge shape by shaping rolls on the film.
  • the membrane 10 In the closed state of the pressure relief valve 1, in which the adhesive-free zone 15 of the membrane 10 rests on the congruent part of the wall 3, the membrane 10 has the shape of a groove.
  • the adhesive-free zone 15 forms a valve member and the congruent plane part of the wall 3 forms a valve seat. If the pressure in the interior of the bag pack rises above the surrounding atmospheric pressure, the elastic and flexible, adhesive-free zone 15 of the membrane 10, starting from the central area covering the holes 4, is first lifted off in the form of an enlarging bubble and then in the form of a flat curvature , forming a channel through which gas flows out of the interior of the bag package. After a certain amount of gas has been let off and the associated reduction in the internal pressure of the package, the adhesive-free zone 15 lies again in a sealing manner on the wall 3.
  • the wedge-shaped adhesive has the advantage that in the region of the transition from the adhesive-free zone 15 to the edge zones 13, 14 to the adhesive strips 11, 12 no cannulas can be formed which impair the tightness of the pressure relief valve 1. Furthermore, the thick part of the adhesive strips 11, 12 acts as a spacer, so that a wall of an adjacent pack in a multipack is supported on the raised edge zones 13, 14 of the membrane 10, so that the excess of the adhesive-free zone 15 bulges freely to form a channel when overpressure occurs can and thus the functionality of the pressure relief valve is maintained.
  • the plastic adhesive can flow through a longer pressing action of an adjacent, adjacent pack and can thereby flatten the wedge-shaped shape, so that the lifting of the adhesive-free zone 15 of the membrane 10 from the wall 3 of the bag 2 is hindered, according to a further feature of the invention in the area of the thick edge 19 in the adhesive strips 11, 12 solid body 28 or a continuous solid thread 27 embedded ( Figures 5 and 6).
  • the bodies 28, which consist, for example, of quartz sand, are sprinkled and rolled in a track on the edge-thick areas after the adhesive strips 11, 12 have been applied to the membrane 10.
  • the thread 27, which consists of a plastic can run along in a simple manner when applying the adhesive. Furthermore, rigid spacer strips can be arranged on the membrane 10 above the adhesive strips 11, 12.
  • FIG. 2 shows, the surface 21 of the strips 11, 12 which is in contact with the membrane 10 is flat and has a uniform slope. They are further reinforced if the surface 21 is wave-shaped (FIG. 3), so that the area 22 close to the adhesive-free zone 15 and the outer area 23 have a slight slope, whereas the one in between middle area 24 have a large slope.
  • the adhesive strips 11, 12 form a wedge that is not connected in cross section, but rather are applied as two parallel strands 25, 26 on the edge zones 13, 14 of the membrane 10 , wherein the strands 26 of adhesive, which are close to the adhesive-free zone 15, have a very small thickness and the outer strands 25, which are close to the edge edges, have a comparatively large thickness.
  • a liquid sealant for example silicone oil
  • silicone oil is arranged between the adhesive-free zone 15 of the membrane 10 and the congruent part of the wall 3 of the bag 2.
  • the film breaks out of silicone oil and forms again when the pressure relief valve is closed.
  • the sealant is introduced into the channel by depositing a drop of it on at least one end of the channel, from where it is drawn into the channel by capillary action.
  • it can also be arranged on the adhesive-free zone 15 of the membrane 10 before it is attached to the bag 2.
  • sealant when the membrane 10 still adheres to a carrier strip on which the membranes are arranged during manufacture and stored until they are transferred to a packaging container.
  • the sealant can be attached to the outer ends of the adhesive-free zone, but it can also be applied to the central area of the adhesive-free zone if the carrier strip has a breakthrough in the central covering area.
  • the membrane consists of a material whose coefficient of thermal expansion is approximately equal to that of the material from which the bag is made, so that when the temperature changes there are no tensions in the membrane which affect the tightness and the opening pressure of the pressure relief valve.
  • the membrane 10 forms, together with the wall 3 of a packaging container 2, a pressure relief valve. If the wall 3 has little rigidity, so that uncontrollable stresses are transmitted to the membrane 10, it is also possible to fix the membrane 10 with the wedge-shaped adhesive strips 11, 12 on a congruent, perforated base plate 30, and the valve thus formed on to glue the wall of the packaging container 3 ( Figure 7).
  • the base plate 31, which consist of polyvinyl chloride or a similar plastic and can have a thickness of 150-250 ⁇ m, has a central hole 32 and is provided with an adhesive layer 33 over the entire surface on the underside.
  • a solhces pressure relief valve 1 ' is attached with its hole 32 to cover the holes 4 in the bag 2 on the wall 3 of the bag 2.
  • the strips 11, 12 have particles of a substance mixed into them in the adhesive, which can be easily and safely probed with a test device.
  • Such substances which preferably have magnetic, fluorescent or luminescent properties, can work with induction or reflected light.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Bag Frames (AREA)
EP19920100475 1991-02-16 1992-01-14 Valve de surpression pour emballages Expired - Lifetime EP0499783B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4104803 1991-02-16
DE4104803 1991-02-16
DE19914129838 DE4129838A1 (de) 1991-02-16 1991-09-07 Ueberdruckventil fuer verpackungsbehaelter
DE4129838 1991-09-07

Publications (2)

Publication Number Publication Date
EP0499783A1 true EP0499783A1 (fr) 1992-08-26
EP0499783B1 EP0499783B1 (fr) 1995-04-05

Family

ID=25901099

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920100475 Expired - Lifetime EP0499783B1 (fr) 1991-02-16 1992-01-14 Valve de surpression pour emballages

Country Status (4)

Country Link
US (2) US5263777A (fr)
EP (1) EP0499783B1 (fr)
JP (1) JPH05112375A (fr)
DE (2) DE4129838A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996014255A1 (fr) * 1994-11-05 1996-05-17 Robert Bosch Gmbh Soupape de surete pour recipient d'emballage
WO2006034950A1 (fr) * 2004-09-29 2006-04-06 Robert Bosch Gmbh Soupape de sûreté pour contenant d'emballage
WO2007113097A1 (fr) * 2006-04-06 2007-10-11 Tesa Ag Soupape de surpression pour recipient d'emballage
WO2010091910A1 (fr) * 2009-02-12 2010-08-19 Robert Bosch Gmbh Soupape de surpression pour réceptacle d'emballage
WO2010091908A1 (fr) * 2009-02-12 2010-08-19 Robert Bosch Gmbh Soupape de surpression pour réceptacle d'emballage
WO2011064051A1 (fr) * 2009-11-26 2011-06-03 Robert Bosch Gmbh Soupape de sûreté pour un récipient d'emballage

Families Citing this family (98)

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DE4243020A1 (de) * 1992-12-18 1994-06-30 Bosch Gmbh Robert Überdruckventil für Verpackungsbehälter
FR2719028B1 (fr) * 1994-04-20 1996-07-26 Gether Sa Emballage pour produits alimentaires et préparation alimentaire conditionnée, utilisant un tel emballage.
DE19510489A1 (de) * 1995-03-27 1996-10-02 Bosch Gmbh Robert Überdruckventil für einen Verpackungsbehälter
US5584409A (en) * 1995-09-18 1996-12-17 Chemberlen; Christopher H. One direction ventilation valves
JP3198260B2 (ja) * 1996-11-13 2001-08-13 尾本 等 圧力調節弁機能を有する包装材料及び飲食品パッケー
US5780824A (en) * 1997-02-07 1998-07-14 Lulirama International, Inc. Expandable and self-venting novelty container for cooking microwavable popcorn
US6149304A (en) * 1997-05-09 2000-11-21 The Procter & Gamble Company Flexible storage bag with selectively-activatible closure
ATE214024T1 (de) 1997-12-18 2002-03-15 Karl Keller Lebensmittelverpackung und garverfahren für lebensmittel
JP3958441B2 (ja) * 1998-01-29 2007-08-15 ダイワ精工株式会社 釣餌用袋
DE29918753U1 (de) 1999-08-09 2000-02-17 Keller Karl Lebensmittelverpackung
CN1148309C (zh) * 2000-04-26 2004-05-05 普拉斯特株式会社 包装材料及包装制品
JP3602043B2 (ja) * 2000-09-19 2004-12-15 株式会社ザック 包装容器、包装食品、および包装飼料
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SE521684C2 (sv) * 2001-04-30 2003-11-25 Micvac Ab Återförslutningsbar envägsventil för livsmedelsförpackning
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EP1340695A1 (fr) * 2002-02-22 2003-09-03 Celomat Etiquetas Especiales S.A. Soupape unidirectionelle pour emballages flexibles
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US9187229B2 (en) 2011-08-31 2015-11-17 Plitek, L.L.C. Oil-less pressure relief valves
US8636034B2 (en) 2011-08-31 2014-01-28 Plitek, L.L.C. Oil-less and wetted pressure relief valves having an integrated filter
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BR112016010218A2 (pt) * 2013-11-06 2017-08-08 Procter & Gamble recipientes flexíveis fáceis de esvaziar
JP6397037B2 (ja) 2013-11-06 2018-09-26 ザ プロクター アンド ギャンブル カンパニー 可撓性弁を有する可撓性容器
CN105705429B (zh) * 2013-11-06 2019-05-14 宝洁公司 带有通气孔系统的柔性容器
PL3186156T3 (pl) 2014-08-29 2019-03-29 Amcor Flexibles Denmark A/S Elastyczny laminat mający zintegrowany zawór upustowy ciśnienia
US9988190B2 (en) 2015-04-10 2018-06-05 The Procter & Gamble Company Flexible containers with biased dispensing
US10017300B2 (en) 2015-04-10 2018-07-10 The Procter & Gamble Company Flexible containers with product dispensing visibility
FR3040083B1 (fr) * 2015-08-14 2018-02-02 Centre National D'etudes Spatiales Soupape de securite pour enveloppe gonflable
JP6767797B2 (ja) * 2015-10-27 2020-10-14 株式会社メイワパックス 弁装置付き包装体及びこれに使用する弁装置
JP6499125B2 (ja) * 2016-07-01 2019-04-10 シーレックス株式会社 ガス抜き弁、収容体および接着シート
JP6990195B2 (ja) * 2016-12-22 2022-01-12 日東電工株式会社 通気部材とこれを用いた通気筐体及び通気容器
US10358275B1 (en) 2017-06-16 2019-07-23 Plitek, L.L.C. Pressure relief valve with a plural-part dry strap
EP3489011A1 (fr) 2017-11-28 2019-05-29 Amcor Flexibles Denmark A/S Stratifié souple ayant une soupape de surpression intégrée améliorée
US10783805B2 (en) 2018-01-15 2020-09-22 LaserSharp FlexPak Services, LLC Microchannel device for controlling gas, vapor, pressure within a package
US10781023B2 (en) 2018-01-15 2020-09-22 LaserSharp FlexPak Services, LLC Device for controlling gas, vapor, pressure within a package
ES1214089Y (es) * 2018-05-10 2018-09-13 Garcia Pedro Terron Válvulas temporizada con sistema de alerta
US11603252B2 (en) 2018-06-22 2023-03-14 Campbell Soup Company Microwaveable food containers and food products for high-temperature cooking
KR102040443B1 (ko) 2019-06-03 2019-11-04 소윤섭 포장재용 가스 배출밸브
US11352183B2 (en) 2020-03-05 2022-06-07 Plitek, L.L.C. Pressure relief valve with wetting fluid reservoirs

Citations (4)

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FR2353451A1 (fr) * 1976-06-04 1977-12-30 Hag Ag Soupape de surpression pour recipients d'emballage
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WO1996014255A1 (fr) * 1994-11-05 1996-05-17 Robert Bosch Gmbh Soupape de surete pour recipient d'emballage
WO2006034950A1 (fr) * 2004-09-29 2006-04-06 Robert Bosch Gmbh Soupape de sûreté pour contenant d'emballage
US7721752B2 (en) 2004-09-29 2010-05-25 Robert Bosch Gmbh Pressure relief valve for a packaging container
WO2007113097A1 (fr) * 2006-04-06 2007-10-11 Tesa Ag Soupape de surpression pour recipient d'emballage
DE102006016594A1 (de) * 2006-04-06 2007-10-18 Tesa Ag Überdruckventil für einen Verpackungsbehälter
WO2010091910A1 (fr) * 2009-02-12 2010-08-19 Robert Bosch Gmbh Soupape de surpression pour réceptacle d'emballage
WO2010091908A1 (fr) * 2009-02-12 2010-08-19 Robert Bosch Gmbh Soupape de surpression pour réceptacle d'emballage
WO2011064051A1 (fr) * 2009-11-26 2011-06-03 Robert Bosch Gmbh Soupape de sûreté pour un récipient d'emballage
CN102666306A (zh) * 2009-11-26 2012-09-12 罗伯特·博世有限公司 用于包装容器的过压阀

Also Published As

Publication number Publication date
DE4129838A1 (de) 1992-08-20
JPH05112375A (ja) 1993-05-07
US5326176A (en) 1994-07-05
DE59201802D1 (de) 1995-05-11
US5263777A (en) 1993-11-23
EP0499783B1 (fr) 1995-04-05

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