EP1786691B1 - Vented bag - Google Patents

Vented bag Download PDF

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Publication number
EP1786691B1
EP1786691B1 EP05791596A EP05791596A EP1786691B1 EP 1786691 B1 EP1786691 B1 EP 1786691B1 EP 05791596 A EP05791596 A EP 05791596A EP 05791596 A EP05791596 A EP 05791596A EP 1786691 B1 EP1786691 B1 EP 1786691B1
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EP
European Patent Office
Prior art keywords
valve
polyvinyl alcohol
protective sheet
valve bag
carrier material
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
EP05791596A
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German (de)
French (fr)
Other versions
EP1786691A1 (en
Inventor
Hans-Joachim Wichmann
Günter Südecum
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.)
Mondi AG
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Mondi AG
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 Mondi AG filed Critical Mondi AG
Priority to PL05791596T priority Critical patent/PL1786691T3/en
Publication of EP1786691A1 publication Critical patent/EP1786691A1/en
Application granted granted Critical
Publication of EP1786691B1 publication Critical patent/EP1786691B1/en
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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
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/14—Valve bags, i.e. with valves for filling
    • B65D31/142—Valve bags, i.e. with valves for filling the filling port being formed by folding a flap connected to a side, e.g. block bottoms

Definitions

  • the invention relates to a valve bag according to the preamble of claim 1.
  • Valve bags are usually made with a folded bottom, such as a cross bottom, with bottom flaps over a corner turn.
  • a valve is fastened, which usually consists of a folded in the bottom longitudinal direction carrier material, wherein the valve has a top and a bottom, which are interconnected via L Lucassfaltlinien.
  • the valve is thus in a closed state flat in the ground until it is spread for filling, for example by means of a filling tube, from the outside of the bag and thus allows the filling of the bag interior.
  • the valve action of the valve results from the fact that the filling material of the bag presses against the ground and thereby presses the valve bottom against the valve top, so that the valve is closed.
  • the carrier material of the valve with a weldable layer and to weld the upper side to the underside of the valve by means of heat, ultrasound or electromagnetic high frequency action.
  • the application of the weldable layer on the substrate is done regularly by gluing or melting a film of a weldable material.
  • a film of polyvinyl alcohol can be used.
  • the problem here is that the bond between the film and the carrier material formed mostly of paper does not withstand all the loads, so that the film is released from the carrier material under high load and the Effect of welding picks up.
  • GB-A-1 538 876 discloses the features of the preamble of claim 1.
  • the invention has for its object to improve the closure of a valve sack with a valve so that the shutter withstands high loads.
  • a polyvinyl alcohol is used as the sealable layer, which is not applied in the form of a film on the support layer, but as an aqueous solution, whereby a good anchoring of the forming during drying polyvinyl alcohol layer on the preferably formed by paper carrier material, the is stronger than the cohesion of the carrier material, even with kraft paper. An attempt to separate the polyvinyl alcohol layer from the carrier material thus leads to cracking of the carrier material.
  • a preferred degree of saponification of the polyvinyl alcohol used according to the invention is> 85%.
  • the degrees of saponification of the polyvinyl alcohol according to the invention are thus significantly higher than those of the polyvinyl alcohol films hitherto used for the production of a weldable layer.
  • the weldable layer according to the invention which has been formed by drying the polyvinyl alcohol emulsion
  • the weldable layer can be re-emulsified by the action of water so that the layer becomes sticky due to moisture and forms an undesired connection with the corresponding opposite layer or layer can cause the opposite carrier material. If this hazard is due to exposure to moisture, it is appropriate to insert a protective sheet between the top and bottom of the valve. This protective sheet is preferably removable prior to filling the valve sack, for example manually by an actuation lug or engagement provided on the protective sheet.
  • the protective sheet is double-layered with a fold pointing to the inside of the bag, the two layers of the protective sheet being fastened to the top or bottom side of the valve at their free ends facing away from the fold, which thus point towards the outside of the bag.
  • an adhesion over a small adhesive area is sufficient.
  • FIG. 1 shows a sheet from which a valve 1 is folded by two from the bottom 2 over two longitudinal fold lines 3 two top 4 forming flaps are folded over each other slightly overlapping the bottom 2.
  • FIG. 1 visible, after folding facing each other surfaces of the bottom 2 and top 4 are coated with a layer of polyvinyl alcohol.
  • the coating is carried out with an aqueous emulsion of polyvinyl alcohol with a degree of saponification of 88%.
  • the emulsion has a solids content of 30%, a pH of 6 +/- 1 and a viscosity of 2500 ⁇ 500 (according to Brookfield).
  • the amount of polyvinyl alcohol applied is 40 g / m 2 .
  • the dried layer is elastic and clear and can be welded in the usual way, ie with hot air, a heated welding tongs, with ultrasound etc. The welding is also possible with moisture and a short pressing.
  • FIG. 2 shows that the closed with the fold line 8 to the interior of the bag wall 11 protective sheet 5 is fixed to the front free ends 9, 10 at the top 4 and bottom 2 of the valve 1.
  • This attachment is achieved by the insertion of the filling tube 12 into the valve 1, because the front tip of the filling tube 12 abuts against the closed over the fold line 8 protective sheet 5 and this pushes on further insertion of the filling tube 12 into the valve 1 in the bag interior.
  • the protective sheet 5 is thus removed for the filling process and thus does not interfere neither during filling in a subsequent welding of top 4 and bottom 2 with each other.
  • a double-layered protective sheet 5 also allows a simple protective sheet the protective function against accidental bonding of the bottom 2 and top 4 of the valve 1, when the protective sheet 5 provided with a suitable engagement or a suitable approach is that protrudes from the valve 1 and allows the withdrawal of the protective sheet 5 from the valve 1 before filling.

Abstract

The invention relates to a vented bag comprising a tubular vent that is secured in a folded base. Said vent comprises an upper face ( 4 ) that lies flat on a lower face ( 2 ) and consists of a base material that is provided with a weldable layer. The aim of the invention is to obtain a stable connection between the base material and the weldable layer. To achieve this, the weldable layer consists of a polyvinyl alcohol with a saponification degree >=75%, which is applied to the base material in the form of an aqueous emulsion and is then dried.

Description

Die Erfindung betrifft einen Ventilsack gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a valve bag according to the preamble of claim 1.

Ventilsäcke werden üblicherweise mit einem gefalteten Boden, beispielsweise einem Kreuzboden, gefertigt, wobei Bodenklappen über einen Eckeinschlag greifen. In dem zwischen dem Eckeinschlag und den Bodenklappen gebildeten Zwischenraum wird ein Ventil befestigt, das üblicherweise aus einem in Bodenlängsrichtung gefalteten Trägermaterial besteht, wobei das Ventil eine Oberseite und eine Unterseite aufweist, die über Längsfaltlinien miteinander verbunden sind. Das Ventil liegt somit in einem geschlossenen Zustand flach im Boden, bis es zur Befüllung, beispielsweise mittels eines Füllrohres, von der Sackaußenseite her aufgespreizt wird und so die Befüllung des Sackinnem ermöglicht. Die Ventilwirkung des Ventils ergibt sich daraus, dass das Füllmaterial des Sackes gegen den Boden drückt und dadurch die Ventilunterseite gegen die Ventiloberseite presst, sodass das Ventil verschlossen ist.Valve bags are usually made with a folded bottom, such as a cross bottom, with bottom flaps over a corner turn. In the intermediate space formed between the Eckeinschlag and the bottom flaps, a valve is fastened, which usually consists of a folded in the bottom longitudinal direction carrier material, wherein the valve has a top and a bottom, which are interconnected via Längsfaltlinien. The valve is thus in a closed state flat in the ground until it is spread for filling, for example by means of a filling tube, from the outside of the bag and thus allows the filling of the bag interior. The valve action of the valve results from the fact that the filling material of the bag presses against the ground and thereby presses the valve bottom against the valve top, so that the valve is closed.

Da dabei ein gewisses Ausrieseln oder Ausstauben des Füllmaterials nicht ausgeschlossen ist, ist es bekannt, das Trägermaterial des Ventils mit einer verschweißbaren Schicht zu versehen und die Oberseite mit der Unterseite des Ventils durch Wärme-, Ultraschall- oder elektromagnetische Hochfrequenzwirkung zu verschweißen. Die Aufbringung der verschweißbaren Schicht auf das Trägermaterial erfolgt regelmäßig durch Aufkleben oder Aufschmelzen einer Folie aus einem verschweißbaren Material. Hierfür kann auch eine Folie aus Polyvinylalkohol verwendet werden.Since a certain trickling or dusting of the filling material is not excluded, it is known to provide the carrier material of the valve with a weldable layer and to weld the upper side to the underside of the valve by means of heat, ultrasound or electromagnetic high frequency action. The application of the weldable layer on the substrate is done regularly by gluing or melting a film of a weldable material. For this purpose, a film of polyvinyl alcohol can be used.

Problematisch ist dabei jedoch, dass der Verbund zwischen der Folie und dem meist aus Papier gebildeten Trägermaterial nicht allen Belastungen standhält, sodass sich die Folie bei hoher Belastung von dem Trägermaterial löst und den Effekt der Verschweißung aufhebt.However, the problem here is that the bond between the film and the carrier material formed mostly of paper does not withstand all the loads, so that the film is released from the carrier material under high load and the Effect of welding picks up.

GB-A- 1 538 876 offenbart die Merkmale des Oberbegriffs des Anspruchs 1. Der Erfindung liegt die Aufgabe zugrunde, den Verschluss eines Ventilsacks mit einem Ventil so zu verbessern, dass der Verschluss auch hohen Belastungen standhält. GB-A-1 538 876 discloses the features of the preamble of claim 1. The invention has for its object to improve the closure of a valve sack with a valve so that the shutter withstands high loads.

Zur Lösung dieser Aufgabe sind erfindungsgemäß die kennzeichnenden Merkmale bei einem Ventilsack der eingangs erwähnten Art vorgesehen.To achieve this object, the characterizing features are provided according to the invention in a valve bag of the type mentioned.

Gemäß der vorliegenden Erfindung wird als verschweißbare Schicht ein Polyvinylalkohol verwendet, der jedoch nicht in Form einer Folie auf die Trägerschicht aufgebracht wird, sondern als wässrige Lösung, wodurch eine gute Verankerung der sich beim Trocknen bildenden Polyvinylalkoholschicht auf dem vorzugsweise durch Papier gebildeten Trägermaterial ergibt, die regelmäßig, auch bei Kraftpapier, stärker als die Kohäsion des Trägermaterials ist. Ein Versuch der Abtrennung der Polyvinylalkoholschicht von dem Trägermaterial führt somit zu einem Reißen des Trägermaterials.According to the present invention, a polyvinyl alcohol is used as the sealable layer, which is not applied in the form of a film on the support layer, but as an aqueous solution, whereby a good anchoring of the forming during drying polyvinyl alcohol layer on the preferably formed by paper carrier material, the is stronger than the cohesion of the carrier material, even with kraft paper. An attempt to separate the polyvinyl alcohol layer from the carrier material thus leads to cracking of the carrier material.

Ein bevorzugter Verseifungsgrad des erfindungsgemäß verwendeten Polyvinylalkohols liegt bei > 85 %. Die erfindungsgemäßen Verseifungsgrade des Polyvinylalkohols liegen somit deutlich höher als der der für die Herstellung einer verschweißbaren Schicht bisher verwendeten Polyvinylalkohol-Folien.A preferred degree of saponification of the polyvinyl alcohol used according to the invention is> 85%. The degrees of saponification of the polyvinyl alcohol according to the invention are thus significantly higher than those of the polyvinyl alcohol films hitherto used for the production of a weldable layer.

Bei der Verwendung der erfindungsgemäßen verschweißbaren Schicht, die durch Trocknen der Polyvinylalkohol-Emulsion gebildet worden ist, muss beachtet werden, dass die verschweißbare Schicht durch Wassereinwirkung wieder emulgierbar ist, sodass die Schicht durch Feuchtigkeit klebrig wird und eine ungewollte Verbindung mit der entsprechenden gegenüberliegenden Schicht bzw. dem gegenüberliegenden Trägermaterial hervorrufen kann. Wenn diese Gefahr aufgrund von Feuchtigkeitseinwirkungen besteht, ist es zweckmäßig, zwischen Oberseite und Unterseite des Ventils ein Schutzblatt einzulegen. Dieses Schutzblatt ist vorzugsweise vor dem Befüllen des Ventilsacks entfernbar, beispielsweise manuell durch einen Betätigungsansatz oder einen am Schutzblatt vorgesehenen Eingriff.When using the weldable layer according to the invention, which has been formed by drying the polyvinyl alcohol emulsion, it must be noted that the weldable layer can be re-emulsified by the action of water so that the layer becomes sticky due to moisture and forms an undesired connection with the corresponding opposite layer or layer can cause the opposite carrier material. If this hazard is due to exposure to moisture, it is appropriate to insert a protective sheet between the top and bottom of the valve. This protective sheet is preferably removable prior to filling the valve sack, for example manually by an actuation lug or engagement provided on the protective sheet.

In einer bevorzugten Ausführungsform ist das Schutzblatt doppellagig mit einer zur Sackinnenseite zeigenden Faltung versehen, wobei die beiden Lagen des Schutzblattes an ihren von der Faltung abgewandten freien Enden, die somit zur Sackaußenseite zeigen, an der Oberseite bzw. Unterseite des Ventils befestigt sind. Hierfür reicht ein Anhaften über eine geringe Klebfläche aus. Ein derartiges Schutzblatt wird bei der Verwendung eines Füllrohres für die Befüllung des Ventilsacks durch die Spitze des Füllrohres von dem Ventil abgelöst und in das Sackinnere gestoßen, sodass das Ventil für die Befüllung des Ventilsackes offen ist.In a preferred embodiment, the protective sheet is double-layered with a fold pointing to the inside of the bag, the two layers of the protective sheet being fastened to the top or bottom side of the valve at their free ends facing away from the fold, which thus point towards the outside of the bag. For this purpose, an adhesion over a small adhesive area is sufficient. When using a filling tube for filling the valve sack, such a protective sheet is detached from the valve by the tip of the filling tube and pushed into the interior of the bag so that the valve is open for filling the valve sack.

Die Erfindung wird im Folgenden anhand eines in den Zeichnungen dargestellten Ausführungsbeispiels näher erläutert.The invention will be explained in more detail below with reference to an embodiment shown in the drawings.

Es zeigen:

Figur 1 -
eine perspektivische Ansicht eines zu einer Schlauchform faltbaren Ventils mit einem doppellagigen Schutzblatt
Figur 2 -
eine schematische Darstellung des in einen Ventilsack eingesetzten Ventils gemäß Figur 1 und seine Verwendung bei der Befüllung mit einem Füllrohr.
Show it:
FIG. 1 -
a perspective view of a foldable to a tube shape valve with a double-layered protective sheet
FIG. 2 -
a schematic representation of the valve used in a valve bag according to FIG. 1 and its use in filling with a stuffing tube.

Figur 1 zeigt ein Blatt, aus dem ein Ventil 1 gefaltet wird, indem von einer Unterseite 2 über zwei Längsfaltlinien 3 zwei die Oberseite 4 bildende Klappen sich einander etwas überlappend auf die Unterseite 2 umgeklappt werden. Die in Figur 1 sichtbare, nach dem Umklappen gegeneinander zeigenden Flächen der Unterseite 2 und Oberseite 4 sind mit einer Schicht aus Polyvinylalkohol beschichtet. FIG. 1 shows a sheet from which a valve 1 is folded by two from the bottom 2 over two longitudinal fold lines 3 two top 4 forming flaps are folded over each other slightly overlapping the bottom 2. In the FIG. 1 visible, after folding facing each other surfaces of the bottom 2 and top 4 are coated with a layer of polyvinyl alcohol.

Die Beschichtung erfolgt mit einer wässrigen Emulsion des Polyvinylalkohols mit einem Verseifungsgrad von 88 %.The coating is carried out with an aqueous emulsion of polyvinyl alcohol with a degree of saponification of 88%.

Die Emulsion weist einen Feststoffgehalt von 30 %, einen pH-Wert von 6 +/- 1 und eine Viskosität von 2500 ± 500 (nach Brookfield) auf.The emulsion has a solids content of 30%, a pH of 6 +/- 1 and a viscosity of 2500 ± 500 (according to Brookfield).

Nach dem Trocknen der Emulsion beträgt die Auftragsmenge an Polyvinylalkohol 40 g/m2. Die getrocknete Schicht ist elastisch und klar und kann in üblicher Weise verschweißt werden, also mit Heißluft, einer beheizten Schweißzange, mit Ultraschall usw. Die Verschweißung ist auch mit Feuchtigkeit und einem kurzen Pressen möglich.After drying the emulsion, the amount of polyvinyl alcohol applied is 40 g / m 2 . The dried layer is elastic and clear and can be welded in the usual way, ie with hot air, a heated welding tongs, with ultrasound etc. The welding is also possible with moisture and a short pressing.

Die Beschichtung ist rückstandsfrei reemulgierbar, wodurch das Material problemlos für ein Recycling geeignet Ist.

  • Figur 1 lässt ein in das Ventil 1 eingelegtes Schutzblatt 5 erkennen, das doppellagig ausgebildet ist und eine untere Lage 6 und eine obere Lage 7 aufweist, die über eine quer zur Längsrichtung des Ventils 1 zum Sackinneren zeigende Faltlinie 8 miteinander verbunden sind, sodass die Lagen 6, 7 zwei freie Kanten 9, 10 aufweisen, die zur zum Sackaußenraum zeigenden Öffnung des Ventils 1 zeigen.
  • Figur 2 verdeutlicht ein in eine Sackwandung 11 eingesetztes Ventil 1, das durch entgegengesetztes Wölben von Unterseite 2 und Oberseite 4 geöffnet ist und in diesem Zustand die Einführung eines Füllrohres 12 ermöglicht. Das Füllrohr 12 ist an seinem Ende mit einem umlaufenden Blähschlauch 13 versehen, durch den eine Abdichtung zwischen dem Füllrohr 12 und dem Ventil 1 für den Befüllvorgang herstellbar ist, sodass ein Ausstauben von Füllmaterial aus dem Ventil 1 verhindert wird.
The coating is re-emulsifiable residue-free, making the material easy to recycle.
  • FIG. 1 5 shows a protective sheet 5 inserted in the valve 1, which is designed as a double-layered material and has a lower layer 6 and an upper layer 7, which are connected to one another via a fold line 8 pointing transversely to the longitudinal direction of the valve 1 to the interior of the bag, so that the layers 6, 7 have two free edges 9, 10, which point to the blind exterior facing opening of the valve 1.
  • FIG. 2 illustrates an inserted into a bag wall 11 valve 1, which is opened by opposing buckling of bottom 2 and top 4 and in this state, the introduction of a filling tube 12 allows. The filling tube 12 is provided at its end with a circulating Blähschlauch 13, through which a seal between the filling tube 12 and the valve 1 for the filling process can be produced, so that a dusting of filler material from the valve 1 is prevented.

Figur 2 lässt erkennen, dass das mit der Faltlinie 8 zum Innern der Sackwandung 11 geschlossene Schutzblatt 5 mit den vorderen freien Enden 9, 10 an der Oberseite 4 bzw. Unterseite 2 des Ventils 1 festgelegt ist. Diese Befestigung wird durch das Einführen des Füllrohres 12 in das Ventil 1 gelöst, weil die vordere Spitze des Füllrohres 12 gegen das über die Faltlinie 8 geschlossene Schutzblatt 5 stößt und dieses beim weiteren Einführen des Füllrohres 12 in das Ventil 1 in das Sackinnere drückt. Das Schutzblatt 5 ist somit für den Befüllvorgang entfernt und stört somit weder beim Befüllen noch bei einem anschließenden Verschweißen von Oberseite 4 und Unterseite 2 miteinander. FIG. 2 shows that the closed with the fold line 8 to the interior of the bag wall 11 protective sheet 5 is fixed to the front free ends 9, 10 at the top 4 and bottom 2 of the valve 1. This attachment is achieved by the insertion of the filling tube 12 into the valve 1, because the front tip of the filling tube 12 abuts against the closed over the fold line 8 protective sheet 5 and this pushes on further insertion of the filling tube 12 into the valve 1 in the bag interior. The protective sheet 5 is thus removed for the filling process and thus does not interfere neither during filling in a subsequent welding of top 4 and bottom 2 with each other.

Sofern kein doppellagiges Schutzblatt 5 verwendet wird, wie es in der Zeichnung dargestellt ist, ermöglicht auch ein einfaches Schutzblatt die Schutzfunktion vor einem unbeabsichtigten Verkleben von Unterseite 2 und Oberseite 4 des Ventils 1, wenn das Schutzblatt 5 mit einem geeigneten Eingriff oder einem geeigneten Ansatz versehen ist, der aus dem Ventil 1 herausragt und das Herausziehen des Schutzblatts 5 aus dem Ventil 1 vor dem Befüllen ermöglicht.Unless a double-layered protective sheet 5 is used, as shown in the drawing, also allows a simple protective sheet the protective function against accidental bonding of the bottom 2 and top 4 of the valve 1, when the protective sheet 5 provided with a suitable engagement or a suitable approach is that protrudes from the valve 1 and allows the withdrawal of the protective sheet 5 from the valve 1 before filling.

Claims (6)

  1. Valve bag, with a tubular valve (1) fastened in a folded bottom and having a top side (4) lying flat on an underside (2), said valve bag consisting of a carrier material provided with a connectable layer, the connectable layer consisting of a polyvinyl alcohol applied in the form of an aqueous emulsion to the carrier material and dried, characterized in that the connection of the layers takes place by means of heat sealing, and in that the polyvinyl alcohol has a degree of saponification ≥ 75%.
  2. Valve bag according to Claim 1, characterized in that a protective sheet (5) is inserted between the top side (4) and the underside (2) of the valve (1).
  3. Valve bag according to Claim 2, characterized in that the protective sheet (5) is provided, double-ply, with a fold (8) pointing towards the bag inside, and in that the two plies (6, 7) of the protective sheet (5) are fastened at their free ends (9, 10) facing away from the fold (8) to the top side (4) and to the underside (2) of the valve (1) respectively.
  4. Valve bag according to one of Claims 1 to 3, characterized in that the carrier material is paper.
  5. Valve bag according to one of Claims 1 to 4, characterized in that the degree of saponification of the polyvinyl alcohol is ≥ 85%.
  6. Valve bag according to Claim 5, characterized in that the degree of saponification of the polyvinyl alcohol amounts to 88%.
EP05791596A 2004-09-06 2005-09-05 Vented bag Active EP1786691B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL05791596T PL1786691T3 (en) 2004-09-06 2005-09-05 Vented bag

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004043446A DE102004043446B4 (en) 2004-09-06 2004-09-06 valve bag
PCT/EP2005/009511 WO2006027184A1 (en) 2004-09-06 2005-09-05 Vented bag

Publications (2)

Publication Number Publication Date
EP1786691A1 EP1786691A1 (en) 2007-05-23
EP1786691B1 true EP1786691B1 (en) 2009-01-28

Family

ID=35311342

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05791596A Active EP1786691B1 (en) 2004-09-06 2005-09-05 Vented bag

Country Status (8)

Country Link
US (1) US20080075397A1 (en)
EP (1) EP1786691B1 (en)
AT (1) ATE421943T1 (en)
DE (2) DE102004043446B4 (en)
DK (1) DK1786691T3 (en)
ES (1) ES2318540T3 (en)
PL (1) PL1786691T3 (en)
WO (1) WO2006027184A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007015099A1 (en) 2007-03-29 2008-10-02 Construction Research & Technology Gmbh Paper valve bag with inner latch

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE800931C (en) * 1948-10-02 1950-12-14 Verpackungsbedarf G M B H Valve bag and process for its manufacture
GB1538876A (en) * 1975-10-03 1979-01-24 American Colloid Co Valve-type bags and method of sealing them
DE2551649A1 (en) * 1975-11-18 1977-06-08 Bischof & Klein CROSS OR BLOCK BOTTOM BAG
DE3600168A1 (en) * 1986-01-07 1987-07-09 Ato Abfuelltechnik Gmbh Valve bag with self-closing valve
DE3788026T2 (en) * 1986-08-27 1994-04-21 Kawasumi Lab Inc Method and device for culturing cells.
JPH05219834A (en) * 1992-02-14 1993-08-31 Fumiko Kobayashi Disposable culture bag and culture process
US5447235A (en) * 1994-07-18 1995-09-05 Air Packaging Technologies, Inc. Bag with squeeze valve and method for packaging an article therein
US6146875A (en) * 1997-05-02 2000-11-14 Ward; N. Robert Method for culturing microorganisms in prefilled flexible containers
US20020192742A1 (en) * 1999-12-17 2002-12-19 Masashi Ushiyama Microorganism incubator and microorganism culture medium comprising the same
US6491166B1 (en) * 2000-11-20 2002-12-10 Cryovac, Inc. Method and apparatus for evacuating shrink film packages
DE10057518A1 (en) * 2000-11-21 2002-07-18 Sca Hygiene Prod Gmbh Multi-layer flat product, which consists of tissue paper and / or non-woven nonwoven

Also Published As

Publication number Publication date
PL1786691T3 (en) 2009-07-31
US20080075397A1 (en) 2008-03-27
ES2318540T3 (en) 2009-05-01
DE102004043446B4 (en) 2006-06-08
DE502005006574D1 (en) 2009-03-19
WO2006027184A1 (en) 2006-03-16
EP1786691A1 (en) 2007-05-23
DK1786691T3 (en) 2009-05-25
DE102004043446A1 (en) 2006-03-23
ATE421943T1 (en) 2009-02-15

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