EP0444261B1 - Flexible packaging container in the form of a bag or pouch, made from plastic film - Google Patents
Flexible packaging container in the form of a bag or pouch, made from plastic film Download PDFInfo
- Publication number
- EP0444261B1 EP0444261B1 EP90123842A EP90123842A EP0444261B1 EP 0444261 B1 EP0444261 B1 EP 0444261B1 EP 90123842 A EP90123842 A EP 90123842A EP 90123842 A EP90123842 A EP 90123842A EP 0444261 B1 EP0444261 B1 EP 0444261B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wall part
- air
- bag
- packaging container
- 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.)
- Expired - Lifetime
Links
- 238000009459 flexible packaging Methods 0.000 title claims description 6
- 239000002985 plastic film Substances 0.000 title description 8
- 229920006255 plastic film Polymers 0.000 title description 8
- 239000000463 material Substances 0.000 claims description 33
- 238000004806 packaging method and process Methods 0.000 claims description 17
- 125000006850 spacer group Chemical group 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims 1
- 238000005429 filling process Methods 0.000 description 7
- 238000009423 ventilation Methods 0.000 description 5
- 238000013022 venting Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
Images
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
- B65D33/00—Details of, or accessories for, sacks or bags
- B65D33/01—Ventilation or drainage of bags
Definitions
- the invention relates to a flexible packaging container in the form of a sack or bag made of plastic film or the like.
- Air-impermeable material with an air outlet area in a sack wall in which the sack material is provided as an outer wall part with perforations for an air passage from the filling space of the sack and the perforated sack material on the inside air-permeable inner wall part is covered.
- Flexible packaging containers of this type in the form of a sack or bag are known in numerous embodiments, the head end and the bottom of the sack being able to be closed by simple end weld seams and the like. Instead, the two bag ends can also be closed by a molded bottom, for example a cross bottom with corner inserts and bottom side envelopes lying opposite one another in pairs and, if appropriate, an outer bottom cover sheet connected to them.
- the sack material can be single-layer or multi-layer and consists primarily of plastic film or a plastic ribbon fabric, to give the packaging container its airtight character.
- Such packaging containers offer the filling material above all a high level of moisture protection, as is desired for the storage of numerous filling goods.
- the invention has for its object to provide a flexible packaging container in the form of a sack or bag of the type mentioned, in which an effective venting process can be maintained when filling the packaging container using pneumatic filling devices.
- the inner wall part in turn consists of air-impermeable material such as plastic film and is also provided with perforations for its air-permeable design, but which have a design and arrangement for a larger air passage than the perforations of the outer wall part in the air outlet area of the sack wall , and that the inner wall part and the outer wall part together delimit a closed air chamber on all sides.
- the air chamber delimited by these is filled with air during the filling process due to the different air passages of the inner wall part and outer wall part.
- valve bag made of plastic film designated as a whole by 1
- the valve bag 1 is closed at its head end 2 and at its bottom 3 by a transverse weld seam or a molded bottom.
- a filling valve 4 is incorporated into the sack.
- the bag wall 5 is formed by an initially flat piece of plastic film which, as can be seen in FIG. 2, is closed by a double longitudinal seam to form a bag tube.
- the double longitudinal seam comprises two individual longitudinal seams 6 and 7, which connect mutually correspondingly overlapping longitudinal edge parts of the sack wall 5. This forms an outer wall part 8 and an inner wall part 9 of the sack wall 5.
- the wall parts 8 and 9 define an air outlet area of the bag wall 5, in which air outlet openings or perforations 10 and 11 are incorporated into the outer wall part 8 and the inner wall part 9 of the bag wall 5, respectively.
- the air passage caused in this way is dimensioned considerably larger in the inner wall part 9 than in the outer wall part. This is achieved, for example, in that, assuming the same size of the perforations 10, 11, a larger number of perforations 11 is provided in the inner wall part 9 than perforations 10 in the outer wall part 8, with the rest being uniformly distributed over the air outlet area.
- the air passage through the inner wall part 9 can be twice as large as through the outer wall part 8.
- the outer wall part 8 and the inner wall part 9 together delimit an air chamber 12 which passes through the longitudinal seams 6 and 7 at their longitudinal edges and at their transverse ends the closures of the head end 2 and of the bottom 3 is closed.
- the outer wall part 8 and the inner wall part 9 are held at a mutual distance by spacers 13 arranged in the air chamber 12, so that a flat abutment of the two wall parts 8, 9 is always avoided.
- these spacers 13 are formed in a simple manner from material characteristics which are directed towards the air chamber 12 from at least one of the two wall parts 8, 9.
- an air outlet area can be formed at another point of the bag 1 by attaching a separate strip of material on the inside or outside of the bag wall 5 by longitudinal seams corresponding to the longitudinal seams 6 and 7 to form the air chamber 12, which is closed on all sides . It is essential that the outer wall part 8 and the inner wall part 9 always have essentially the same material properties, in particular with regard to their strength and their elongation behavior. This condition is of course fulfilled from the outset in the exemplary embodiment shown, in which the two wall parts 8 and 9 are formed by overlapping the side edges of the sack wall 5.
- Fig. 1 the venting process during the filling of the bag 1 is schematically illustrated.
- a highly air-enriched filling material 14 (100 l / min.) Is filled in according to the arrow 4a with an assumed pressure of 0.2 bar.
- the air passage of the outer wall part 8 is set so that it z. B. 50 ltr./min. is while the air passage of the inner wall part 9 z. B. 100 l / min. is.
- more air is fed into the air chamber 12 through the inner wall part than can escape to the outside through the outer wall part 8, as is symbolized by the flow arrows 15 and 16. Excess air from the air chamber 12 thus flows back into the bag interior, as illustrated by flow arrows 17.
- a negative pressure is created, as is shown by arrow 18.
- the pressure can be 0.05 bar compared to the pressure of 0.2 bar in the air chamber 12.
- the air circulation generated in this way ensures effective ventilation of the bag 1 during the entire filling process. Any annoying dust escapes could be prevented in a manner known per se by attaching filter materials at a suitable point in the ventilation area.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bag Frames (AREA)
Description
Die Erfindung betrifft ein flexibles Verpackungsbehältnis in Form eines Sackes oder Beutels aus Kunststoffolie oder dgl. luftundurchlässigem Material mit einem Luftaustrittsbereich in einer Sackwand, in dem das Sackmaterial als Außenwandteil mit Perforationen für einen Luftdurchlaß aus dem Füllraum des Sackes versehen und das perforierte Sackmaterial innenseitig von einem luftdurchlässigem Innenwandteil abgedeckt ist.The invention relates to a flexible packaging container in the form of a sack or bag made of plastic film or the like. Air-impermeable material with an air outlet area in a sack wall, in which the sack material is provided as an outer wall part with perforations for an air passage from the filling space of the sack and the perforated sack material on the inside air-permeable inner wall part is covered.
Derartige flexible Verpackungsbehältnisse in Form eines Sackes oder Beutels sind in zahlreichen Ausführungsformen bekannt, wobei das Kopfende und der Boden des Sackes durch einfache Endschweißnähte und dgl. einen Flachboden ausbildende Maßnahmen geschlossen sein können. Statt dessen können die beiden Sackenden auch durch einen Formboden, beispielsweise einen Kreuzboden mit paarweise einander gegenüberliegenden Eckeinschlägen und Bodenseitenumschlägen und gegebenenfalls einem mit diesen verbundenen äußeren Bodendeckblatt, geschlossen sein. Das Sackmaterial kann dabei einlagig oder mehrlagig ausgeführt sein und besteht in erster Linie aus Kunststoffolie oder einem Kunststoff-Bändchengewebe, um dem Verpackungsbehältnis seinen luftundurchlässigen Charakter zu verleihen. Derarige Verpackungsbehältnisse bieten dem Füllgut vor allem einen hohen Feuchtigkeitsschutz, wie es für eine Lagerung zahlreicher Füllgüter erwünscht ist.Flexible packaging containers of this type in the form of a sack or bag are known in numerous embodiments, the head end and the bottom of the sack being able to be closed by simple end weld seams and the like. Instead, the two bag ends can also be closed by a molded bottom, for example a cross bottom with corner inserts and bottom side envelopes lying opposite one another in pairs and, if appropriate, an outer bottom cover sheet connected to them. The sack material can be single-layer or multi-layer and consists primarily of plastic film or a plastic ribbon fabric, to give the packaging container its airtight character. Such packaging containers offer the filling material above all a high level of moisture protection, as is desired for the storage of numerous filling goods.
Während der befüllung des Verpackungsbehältnisses mit Hilfe pneumatischer Füllvorrichtungen, die das in der Regel staub- bzw. rieselfähige Füllgut über ein in einen der Formböden oder beispielsweise in eine Sacklängsnaht eingearbeitetes Füllventil (oder eine sonstige geeignete Öffnung) unter Druck in den Füllraum des Verpackungsbehältnisses fördern, treten aufgrund der Luftundurchlässigkeit des Sackmaterials insbesondere bei hoch luftangereicherten Füllgütern Entlüftungsprobleme auf, da die in das Verpackungsbehältnis durch den Füllvorgang eingedrückte Luft nicht oder nur langsam entweichen kann. Hierdurch wird die Geschwindigkeit, mit der solche sack- oder beutelförmigen Verpackungsbehältnisse befüllt werden können, merklich herabgesetzt.During the filling of the packaging container with the aid of pneumatic filling devices which convey the generally dust-free or free-flowing filling material under pressure into the filling space of the packaging container via a filling valve (or another suitable opening) incorporated in one of the mold bases or, for example, in a longitudinal bag seam, Due to the airtightness of the bag material, venting problems occur in particular in the case of highly air-enriched filling goods, since the air pressed into the packaging container by the filling process cannot escape or can escape only slowly. As a result, the speed at which such sack or bag-shaped packaging containers can be filled is noticeably reduced.
Zur Lösung des Entlüftungsproblems sind bereits zahlreiche Vorschläge bekannt geworden, bei denen das Sackmaterial bzw. die Kunststoffolie bereichsweise mit Entlüftungsöffnungen bzw. -perforationen versehen ist, durch die die beim Füllvorgang in das Verpackungsbehältnis eingetragene Luft nach außen entweichen kann. Um dabei zu vermeiden, daß das staubförmige Füllgut nach außen mitgerissen wird, sind Filtermaterialen wie Vliesstoffe oder Filterpapiere in den verschiedensten Ausführungsformen mit dem perforierten Sackwandteil kombiniert worden, um diesen abzudecken. Die bekannten Lösungsvorschläge sind jedoch sämtlich mit dem Nachteil behaftet, daß sich die einzelnen Sackwandteile, d. h. der perforierte Außenwandteil und der diesen innenseitig abdeckende Filtermaterialteil, beim Füllvorgang dicht aneinanderlegen, wodurch die Entlüftungswirkung stark herabgesetzt wird. Hinzu kommt, daß in Abhängigkeit von der Körnigkeit des Füllmaterials die Luftaustrittsöffnungen bzw. Filtermaterialien vor allem durch feinkörniges, staubförmiges Füllgut sehr rasch verstopft werden und somit keine wirksame Entlüftung mehr stattfinden kann.To solve the venting problem, numerous proposals have already become known in which the sack material or the plastic film is partially provided with venting openings or perforations through which the air introduced into the packaging container during the filling process can escape to the outside. In order to avoid that the dust-like filling material is entrained to the outside, filter materials such as nonwovens or filter papers have been combined in various embodiments with the perforated sack wall part in order to cover it. However, the known proposals for solutions all have the disadvantage that the individual sack wall parts, ie the perforated outer wall part and the filter material part covering this inside, lie close together during the filling process, as a result of which the ventilation effect is greatly reduced. In addition, depending on the granularity of the filling material, the air outlet openings or filter materials are clogged very quickly, particularly by fine-grained, dust-like filling material, and therefore no effective ventilation takes place can.
Der Erfindung liegt die Aufgabe zugrunde, ein flexibles Verpackungsbehältnis in Form eines Sackes oder Beutels der eingangs angegebenen Art zu schaffen, bei dem ein wirksamer Entlüftungsvorgang bei der Befüllung des Verpackungsbehaltnisses mit Hilfe pneumatischer Füllvorrichtungen aufrechterhalten werden kann.The invention has for its object to provide a flexible packaging container in the form of a sack or bag of the type mentioned, in which an effective venting process can be maintained when filling the packaging container using pneumatic filling devices.
Diese Aufgabe wird nach der Erfindung dadurch gelöst, daß der Innenwandteil seinerseits aus luftundurchlässigem Material wie Kunststoffolie besteht und zu seiner luftdurchlässigen Ausbildung ebenfalls mit Perforationen versehen ist, die jedoch eine Ausbildung und Anordnung für einen größeren Luftdurchlaß als die Perforationen des Außenwandteils im Luftaustrittsbereich der Sackwand aufweisen, und daß der Innenwandteil und der Außenwandteil gemeinsam eine randseitig allseits geschlossene Luftkammer begrenzen. Bei dieser Ausgestaltung wird während des Füllvorganges aufgrund der unterschiedlichen Luftdurchlässe von Innenwandteil und Außenwandteil die von diesen begrenzte Luftkammer mit Luft gefüllt. Während der Befüllung, bei der sich das Füllgut nach unten hin zunehmend verdichtet, entsteht im Füllgut selbst ein Unterdruck gegenüber dem in der Luftkammer herrschenden Druck mit der Folge, daß die Perforationen des Innenwandteils zum Füllraum hin freigeblasen werden und eine Luftzirkulation zwischen der Luftkammer und dem Füllgut im Füllraum erreicht wird, die ohne nennenswertes Ausstauben von Füllgut nach außen eine wirksame Entlüftung des Verpackungsbehältnisses bis zum Befüllungsende aufrechterhält, woraufhin sich der verbleibene Restanteil von Luft zwanglos über den perforierten Außenwandteil abbauen kann.This object is achieved according to the invention in that the inner wall part in turn consists of air-impermeable material such as plastic film and is also provided with perforations for its air-permeable design, but which have a design and arrangement for a larger air passage than the perforations of the outer wall part in the air outlet area of the sack wall , and that the inner wall part and the outer wall part together delimit a closed air chamber on all sides. In this embodiment, the air chamber delimited by these is filled with air during the filling process due to the different air passages of the inner wall part and outer wall part. During the filling process, during which the filling material increasingly compresses towards the bottom, a negative pressure is created in the filling material itself compared to the pressure prevailing in the air chamber, with the result that the perforations of the inner wall part are blown free towards the filling chamber and air circulation between the air chamber and the Filling material is reached in the filling chamber, which maintains an effective ventilation of the packaging container to the end of the filling without significant dusting of the filling material to the outside, whereupon the remaining residual portion of air can easily dissipate via the perforated outer wall part.
Weiter bildungen und Vorteile der Erfindung ergeben sich aus den Ansprüchen und der nachstehenden Beschreibung in Verbindung mit der Zeichnung, in der ein Ausführungsbeispiel des Gegenstands der Erfindung schematisch veranschaulicht ist. In der Zeichnung zeigen:
- Fig. 1
- ein erfindungsgemäßes Verpackungsbehältnis aus Kunststoffolie in Form eines Flachsackes im Längsschnitt und
- Fig. 2
- einen Querschnitt durch das Verpackungsbehältnis nach Fig. 1.
- Fig. 1
- an inventive packaging container made of plastic film in the form of a flat bag in longitudinal section and
- Fig. 2
- 2 shows a cross section through the packaging container according to FIG. 1.
In der Zeichnung ist als flexibles Verpackungsbehältnis aus luftundurchlässigem Material ein als Ganzes mit 1 bezeichneter Ventilsack aus Kunststoffolie dargestellt. Der Ventilsack 1 ist an seinem Kopfende 2 und an seinem Boden 3 jeweils durch eine Querschweißnaht oder einen Formboden geschlossen. Im Bereich des Kopfendes 2 ist ein Füllventil 4 in den Sack eingearbeitet.In the drawing, a valve bag made of plastic film, designated as a whole by 1, is shown as a flexible packaging container made of air-impermeable material. The valve bag 1 is closed at its
Die Sackwand 5 ist von einem anfänglich flachen Kunststoffolienstück gebildet, das, wie aus Fig. 2 ersichtlich, durch eine Doppellängsnaht zu einem Sackschlauch geschlossen ist. Die Doppellängsnaht umfaßt zwei einzelne Längsnähte 6 und 7, die einander entsprechend weit überlappende Längsrandteile der Sackwand 5 miteinander verbinden. Hierdurch ist ein Außenwandteil 8 und ein Innenwandteil 9 der Sackwand 5 gebildet. Die Wandteile 8 und 9 definieren einen Luftaustrittsbereich der Sackwand 5, in dem Luftaustrittsöffnungen bzw. Perforationen 10 und 11 in den Außenwandteil 8 bzw. den Innenwandteil 9 der Sackwand 5 eingearbeitet sind.The bag wall 5 is formed by an initially flat piece of plastic film which, as can be seen in FIG. 2, is closed by a double longitudinal seam to form a bag tube. The double longitudinal seam comprises two individual
Der auf diese Weise bewirkte Luftdurchlaß ist beim Innenwandteil 9 erheblich größer als beim Außenwandteil bemessen. Dies ist z.B. dadurch erreicht, daß, bei angenommener gleicher Größe der Perforationen 10,11, eine größere Anzahl von Perforationen 11 im Innenwandteil 9 als Perforationen 10 im Außenwandteil 8 bei im übrigen jeweils gleichmäßiger Verteilung über den Luftaustrittsbereich vorgesehen ist. Beispielsweise kann auf diese Weise der Luftdurchlaß durch den Innenwandteil 9 doppelt so groß sein wie durch den Außenwandteil 8. Der Außenwandteil 8 und der Innenwandteil 9 begrenzen dabei gemeinsam eine Luftkammer 12, die an ihren Längsrändern durch die Längsnnähte 6 und 7 und an ihren Querenden durch die Verschlüsse des Kopfendes 2 und des Bodens 3 geschlossen ist.The air passage caused in this way is dimensioned considerably larger in the
Durch in der Luftkammer 12 angeordnete Abstandhalter 13 sind der Außenwandteil 8 und der Innenwandteil 9 in einem gegenseitigen Abstand gehalten, so daß stets ein flaches Aneinanderliegen der beiden Wandteile 8,9 vermieden ist. Diese Abstandhalter 13 sind bei den dargestellten Beispiel auf einfache Weise von Materialausprägungen gebildet, die von zumindest einem der beiden Wandteile 8,9 zur Luftkammer 12 hin gerichtet sind.The
Anstelle des von der Doppellängsnaht definierten Luftaustrittsbereichs kann an einer anderen Stelle des Sackes 1 ein Luftaustrittsbereich dadurch gebildet werden, daß ein gesonderter Materialstreifen innenseitig oder außenseitig auf der Sackwand 5 durch Längsnähte entsprechend den Längsnähten 6 und 7 zur Ausbildung der randseitig allseits geschlossenen Luftkammer 12 befestigt wird. Wesentlich ist, daß der Außenwandteil 8 und der Innenwandteil 9 stets im wesentlichen die gleichen Materialeigenschaften insbesondere hinsichtlich ihrer Festigkeit und ihres Dehnungsverhaltens aufweisen. Diese Bedingung ist selbstverständlich von vornherein bei dem dargestellten Ausführungsbeispiel erfüllt, bei dem die beiden Wandteile 8 und 9 durch Überlappung der Seitenränder der Sackwand 5 gebildet sind.Instead of the air outlet area defined by the double longitudinal seam, an air outlet area can be formed at another point of the bag 1 by attaching a separate strip of material on the inside or outside of the bag wall 5 by longitudinal seams corresponding to the
In Fig. 1 ist der Entlüftungsvorgang während der Befüllung des Sackes 1 schematisch veranschaulicht. Durch das Füllventil 4 wird ein hoch luftangereichertes Füllgut 14 (100 ltr./min.) entsprechend dem Pfeil 4a mit einem angenommenen Druck von 0,2 bar eingefüllt. Der Luftdurchlaß des Außenwandteils 8 ist hierbei so eingestellt, daß er z. B. 50 ltr./min. beträgt, während dabei der Luftdurchlaß des Innenwandteils 9 z. B. 100 ltr./min. beträgt. Hierdurch wird durch den Innenwandteil mehr Luft in die Luftkammer 12 eingespeist als durch den Außenwandteil 8 nach außen entweichen kann, wie es durch die Strömungspfeile 15 und 16 versinnbildlicht ist. Es erfolgt somit ein Rückströmen der überschüssigen Luft aus der Luftkammer 12 in das Sackinnere, wie dies die Strömungspfeile 17 veranschaulichen. In Füllgut 14 selbst, das sich während des Füllungsvorgangs zum Boden 3 hin zunehmend verdichtet, entsteht ein Unterdruck, wie dies der Pfeil 18 verdeutlicht. Beispielsweise kann in dem angegnommenen Fall in dem unteren Bereich 19 des mehr und mehr mit dem Füllgut 14 befüllten Füllraums 20 der Druck 0,05 bar gegenüber dem Druck von 0,2 bar in der Luftkammer 12 betragen. Die auf diese Weise erzeugte Luftzirkulation gewährleistet eine wirksame Entlüftung des Sackes 1 während des gesamten Befüllungsvorganges. Etwaige störende Staubentweichungen könnten in an sich bekannter Weise durch Anbringung von Filtermaterialien an geeigneter stelle im Entlüftungsbereich verhindert werden.In Fig. 1, the venting process during the filling of the bag 1 is schematically illustrated. Through the
Es versteht sich im übrigen, daß die Dimensionierung der Luftkammergröße, der Abstandhalter in der Luftkammer und des Luftdurchlasses der Wandteile 8,9 auf das zu verpackende Füllgut und die jeweiligen Absackbedingungen abzustimmen sind.It goes without saying that the dimensions of the air chamber size, the spacers in the air chamber and the air passage of the
Claims (7)
- A flexible packaging container (1) in the form of a bag or pouch, made from synthetic plastics film or like material which is impervious to air, with an air outlet area in a bag wall in which the bag material, as an outer wall part (8), is provided with perforations (10) through which air can pass out of the filling space of the bag, the perforated bag material being covered on the inside by an inner wall part (9) which is pervious to air, characterised in that the inner wall part (9) in turn consists of a material such as synthetic plastics film which is impervious to air and in order that air may pass through it, it is likewise provided with perforations (11) which are however are of a construction and disposition to allow a greater throughput of air than that of which the perforations (10) in the outer wall part (8) in the air outlet area of the bag wall (5) are capable and in that the inner wall part (9) and the outer wall part (8) jointly define an air chamber (12) which is closed all around its edges.
- A packaging container according to claim 1, characterised in that the air passage in the inner wall part (9) is considerably larger than the air passage in the outer wall part (8).
- A packaging container according to claim 1 or 2, characterised in that the inner wall part (9) and the outer wall part (8) are maintained at a distance from each other by spacers (13) disposed in the air chamber.
- A packaging container according to claim 3, characterised in that the spacers (13) are formed between inner wall part (9) and outer wall part (8) by protuberances stamped in the material and which are directed towards the air chamber (12) from at least one of the two wall parts (8, 9).
- A packaging container according to one of claims 1 to 4, characterised in that the inner wall part (9) and the outer wall part (8) have substantially the same material properties, particularly with regard to strength and elongation behaviour.
- A packaging container according to one of claims 1 to 5, characterised in that the air outlet area is formed by a longitudinal strip in the bag wall (5) and extending between the top end (2) and the bottom (3) of the bag (1).
- A packaging container according to claim 6, characterised in that the longitudinal strip is bounded on both its longitudinal edges by longitudinal seams (6, 7) connecting the inner wall part (9) and the outer wall part (8) to each other.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9002330U DE9002330U1 (en) | 1990-02-28 | 1990-02-28 | Flexible packaging container in the form of a sack or bag made of plastic film |
| DE9002330U | 1990-02-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0444261A1 EP0444261A1 (en) | 1991-09-04 |
| EP0444261B1 true EP0444261B1 (en) | 1993-08-11 |
Family
ID=6851448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP90123842A Expired - Lifetime EP0444261B1 (en) | 1990-02-28 | 1990-12-11 | Flexible packaging container in the form of a bag or pouch, made from plastic film |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0444261B1 (en) |
| DE (2) | DE9002330U1 (en) |
| ES (1) | ES2045734T3 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008046173A1 (en) * | 2008-09-06 | 2010-04-08 | Nordfolien Gmbh | Packaging container made of plastic film |
| US7927015B2 (en) | 2004-05-27 | 2011-04-19 | Jürgen Heinemeier | Plastic bag with overpressure relief |
| WO2011051739A1 (en) | 2009-10-26 | 2011-05-05 | Mandzsu Zoltan | Improved packaging container with overpressure relief, packing method and system |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5397707A (en) * | 1993-09-30 | 1995-03-14 | Verfaillie; Magda | Receptacle with porous welding the use and the manufacture thereof |
| US5900896A (en) * | 1995-04-27 | 1999-05-04 | Hewlett-Packard Company | Ink cartridge adapters |
| US5856839A (en) * | 1995-04-27 | 1999-01-05 | Hewlett-Packard Company | Ink supply having an integral pump |
| DE29807807U1 (en) * | 1998-04-03 | 1999-08-12 | Bischof Und Klein Gmbh & Co, 49525 Lengerich | Packaging material in the form of a sack or bag made of plastic film or the like. airtight material |
| BRPI0520431A2 (en) * | 2005-07-08 | 2009-05-12 | Starlinger & Co Gmbh | ventilable bag |
| DE102006017229B4 (en) | 2006-04-12 | 2008-06-05 | Nordfolien Gmbh | Packaging for bulk goods, in particular bags of plastic film |
| WO2008058079A2 (en) * | 2006-11-06 | 2008-05-15 | Marko I.R.D.C. | Plastic bag with improved air evacuation structure |
| DE202012006946U1 (en) * | 2012-07-18 | 2012-08-22 | Nordfolien Gmbh | Packaging container with ventilation function |
| DE102019130409A1 (en) | 2019-11-12 | 2021-05-12 | Rkw Se | Laminating composite |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1212857B (en) * | 1962-04-25 | 1966-03-17 | Olin Mathieson | Valve sack for receiving and packaging bulk goods |
| US3302859A (en) * | 1964-12-21 | 1967-02-07 | Bemis Co Inc | Bag |
| DE1908440A1 (en) * | 1969-02-20 | 1970-09-10 | Osthushenrich Kg | Sack, especially valve sack |
| GB1401713A (en) * | 1973-01-17 | 1975-07-30 | British Visqueen Ltd | Plastics sack |
| DE8127809U1 (en) * | 1981-09-23 | 1982-01-07 | Robert Bosch Gmbh, 7000 Stuttgart | Bag pack for powdery filling goods |
| EP0126816A1 (en) * | 1983-05-25 | 1984-12-05 | St. Regis Corporation | Bags, particularly multiwall bags |
| DE3447277A1 (en) * | 1984-12-22 | 1986-06-26 | Nordenia Kunststoffe Peter Mager KG, 2841 Steinfeld | Self-ventilating sack made of plastic film |
-
1990
- 1990-02-28 DE DE9002330U patent/DE9002330U1/en not_active Expired - Lifetime
- 1990-12-11 EP EP90123842A patent/EP0444261B1/en not_active Expired - Lifetime
- 1990-12-11 DE DE9090123842T patent/DE59002323D1/en not_active Expired - Lifetime
- 1990-12-11 ES ES90123842T patent/ES2045734T3/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7927015B2 (en) | 2004-05-27 | 2011-04-19 | Jürgen Heinemeier | Plastic bag with overpressure relief |
| US8371752B2 (en) | 2004-05-27 | 2013-02-12 | Juergen Heinemeier | Plastic bag with overpressure relief |
| DE102008046173A1 (en) * | 2008-09-06 | 2010-04-08 | Nordfolien Gmbh | Packaging container made of plastic film |
| DE102008046173B4 (en) * | 2008-09-06 | 2010-06-17 | Nordfolien Gmbh | Packaging container made of plastic film |
| WO2011051739A1 (en) | 2009-10-26 | 2011-05-05 | Mandzsu Zoltan | Improved packaging container with overpressure relief, packing method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2045734T3 (en) | 1994-01-16 |
| EP0444261A1 (en) | 1991-09-04 |
| DE9002330U1 (en) | 1990-05-03 |
| DE59002323D1 (en) | 1993-09-16 |
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