EP2284090B1 - Bag and method for its production - Google Patents
Bag and method for its production Download PDFInfo
- Publication number
- EP2284090B1 EP2284090B1 EP20090010503 EP09010503A EP2284090B1 EP 2284090 B1 EP2284090 B1 EP 2284090B1 EP 20090010503 EP20090010503 EP 20090010503 EP 09010503 A EP09010503 A EP 09010503A EP 2284090 B1 EP2284090 B1 EP 2284090B1
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- EP
- European Patent Office
- Prior art keywords
- bag
- longitudinal edges
- sealing
- heat
- folded
- 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.)
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- 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
- B65D33/02—Local reinforcements or stiffening inserts, e.g. wires, strings, strips or frames
Definitions
- the invention relates to a bag made of a flexible material with opposite front walls, arranged between the front walls side walls and the front walls with the side walls connecting longitudinal edges, wherein the longitudinal edges are stiffened by sealing seams and extending in the direction of the longitudinal edges reinforcing strips, wherein at the longitudinal edges in each case an associated Front wall forming material portion and a side wall forming material portion are directly connected to the sealed seam.
- the flexible material is in particular a plastic film, preferably a multilayer plastic film.
- the term also includes composite materials having a sealable layer, e.g. B. Composite materials of film and paper and films with fabric reinforcements.
- the invention also provides methods for producing such bags.
- the bags are used as packaging, for example, for particulate, granular or powdery bulk material, which have an approximately rectangular cross-section.
- the bags are often formed by forming a bottom as a stand-up pouch.
- a bag which, according to the features described above, has sealing seams for reinforcement on the longitudinal edges connecting the front walls with the side walls.
- the bag is formed by folding and heat sealing of a material web, wherein the longitudinal edges of the material web are sealed at one of the two front walls to each other to close the bag circumferentially.
- the sealing seams are designed accordingly as blind seals, so do not serve the closure of the bag, but only the stiffening.
- reinforcing strips in which case the longitudinal edges are generated in the region of the reinforcing strip.
- the reinforcing strips are made of a foil and cover the entire area from which the reinforced longitudinal edges are subsequently formed.
- a material section forming the associated front wall and a material section forming the associated side wall are superimposed and welded to one another via the reinforcing strip provided there.
- the sealing seam formed in this way welds the reinforcing strip, which is provided for stiffening, onto itself, folded on its side facing the inside of the bag with itself, this sealing seam being directly adjacent to the interior of the bag.
- the dimensional stability of the bag can be significantly increased.
- the sealing seams are torn open again at the occurrence of peeling forces on the respective self-folded reinforcing strip.
- peel forces may occur, for example, if, upon compression of the bag by stacking or due to momentary shocks, for example, dropping the bag, the internal pressure in the bag increases.
- the seal is separated, there is a risk that the bag completely bursts under load.
- the additional reinforcing strip represents a material reinforcement
- there is also a danger with blindseal seams because weak spots can be formed by heat sealing and buckling of the bag forming material as well as the reinforcing strip.
- a bursting of the bag should be avoided as possible even with extreme force effects, since not only the contents contained in the damaged bag is affected, but also the environment, such as collectively stored bags or other goods, can be significantly contaminated.
- From the US Pat. No. 6,065,873 is a side gusseted bag known, in which at the longitudinal edges reinforcing strips are placed from the outside. In this embodiment, too, there is a risk that the formed sealing seams will be separated by peeling forces.
- the from the US Pat. No. 6,065,873 known bag is provided as a carrying bag, which should not be sealed airtight and / or moisture-proof. The manufacture of the bag, in which the reinforcing strips must be placed around the longitudinal edges, is expensive.
- the invention has for its object to provide a bag with the features described above for packaging, the are characterized by an increased mechanical strength, in particular a higher fall resistance.
- a material portion forming the associated front wall and a material portion forming the associated side wall are directly connected to one another at the sealing seam.
- the associated reinforcing strip on the inside of the bag covers a corner formed between the two material sections.
- the seal seam arranged on the longitudinal edges, which connects the material sections of the front wall and the side wall, is concealed on the inside of the bag by the reinforcing strips running in the direction of the longitudinal edges and thus protected against mechanical loads.
- the reinforcing strip is connected at the side of the sealing seam connecting the material sections to both the associated front wall and the associated side wall. While in the embodiments known from the prior art, the longitudinal edges are strongly stressed in a mechanical force acting on a peeling, these peeling forces are converted according to the embodiment of the invention by the reinforcing strips in shear forces, whereby a significantly higher load capacity is achieved. In addition, there is a uniform, larger-area force distribution, so that overall the stability of the bag and in particular the drop resistance can be greatly increased.
- the bag has as an essential part plastic, wherein the bag provided for the formation of flexible material at least on one side must have heat sealable properties so that the seal seams can be produced.
- the bag is made of a plastic film.
- a thin metal layer, a metallized plastic layer, a tissue of a paper layer and the like is provided inside or on a non-heat sealing side of the foil.
- the invention relates in particular to gusseted bags in which the side walls are formed as gussets, each with a fold line extending between the longitudinal edges.
- gusseted bags there is the advantage that they are initially prefabricated and filled later, both the not yet sealed prefabricated bags and the subsequently filled and sealed, preferably air- and / or moisture-tight sealed bags are included in the present invention .
- By forming gussets the bags can be easily stacked and transported with folded gussets in the flat state. It is also important in addition that the lightest possible filling should be possible.
- the stiffening provided according to the invention at the longitudinal edges and the associated increased dimensional stability, it is easier to introduce a filling funnel of a filling device into the prefastened side-folding bag which is open on one side.
- transverse elements which are sealed on the inside of the bag contribute to a further increase in the dimensional stability and thus additionally facilitate the filling.
- a stiffening element running in the transverse direction of the sealing seams in the form of a stiff piece of film is provided on the inside of the bag, which extends on one of the side or front walls or preferably substantially around the entire circumference.
- the strip-shaped section can be formed, for example, from polyethylene or a multilayer film, for example a polyethylene terephthalate / polyethylene (PET / PE) composite. It is also possible an embossing of this stiffening element, an embossment of the bag wall and / or an arrangement of additional sealing seams, to further increase the strength. In prefabricated bags that are to be filled later, can be achieved by the additional stiffening element in particular a better and faster bag opening of the initially folded areas of the bag held, which allows very short cycle times at filling systems. It should be noted that the filling itself can be done very quickly depending on the contents partially, the entire process speed is then essentially determined by the handling of the bag, so in particular the opening behavior of the bag.
- PET / PE polyethylene terephthalate / polyethylene
- the bag is formed by folding and heat sealing from a material web, wherein the longitudinal edges are then formed at least partially as folding edges.
- the edges of the material web can be connected to one another to form a circumferentially closed tube either on one of the front or side walls or on one of the longitudinal edges.
- all sealing seams at the longitudinal edges as Blind seal seams in the second case be formed on three of the four longitudinal edges as blind seal seams.
- blind seal seam is understood to mean a sealed seam which is not provided for closing the pouch, but essentially only for its stiffening. A complete tightness of the blind seals is therefore not absolutely necessary.
- the blind seals also need not extend the entire length of the bag. To achieve the effect of the present invention, it is sufficient if the blind seals and the reinforcing strips extending in the longitudinal direction extend over most of the length of the bag.
- the front and side walls are preferably formed from a multilayer film, wherein the film on the inside of the bag a first heat-sealable film layer and on the outside a second film layer which is not heat-sealable or at least has a higher melting temperature than the first film layer, having.
- the entire bag can be formed by folding and heat sealing from a single material or foil web.
- Suitable examples are multilayer laminates which have an inner heat-sealable layer of a polyolefin, in particular polyethylene (PE), and an outer layer of a polyester, in particular polyethylene terephthalate (PET).
- PE polyethylene
- PET polyethylene terephthalate
- optional connecting and functional layers made of plastic or even thin metal layers may be provided, in particular to improve the barrier properties.
- a film laminate or a coextrusion film which consists entirely of polyolefin may also be provided to form the bag.
- a biaxially oriented polypropylene (BOPP) is suitable for the second film layer disposed on the outside of heat-sealable first film layer made of polyethylene.
- the reinforcing strips on the inside of the bag each cover the corner formed between the two adjacent material sections.
- Multilayered reinforcing strips are preferably used, wherein an outer heat-sealable layer is sealed to the associated front wall and the associated side wall and wherein the opposite layer is not heat-sealable or at least has a higher melting temperature.
- the reinforcing strips can be fastened to the adjacent material sections in a particularly simple manner when the bag is folded up. However, it must be avoided that the then folded on reinforcing strips stick inside, so are sealed with itself.
- each provided there reinforcing strip with sealing seams on the associated front wall and the associated side wall is attached, these sealing seams at a distance from the sealing seam, at the longitudinal edge considered the material portion of the front wall with the material portion the side wall connects directly.
- the invention also provides a method according to claim 7 for the production of a bag.
- a material web is fed, in which case reinforcing strips are placed on the material web at a distance from one another and connected to the material web.
- the reinforcing strips remain unconnected at least at half their width, wherein initially a prefixing of the reinforcing strips, for example by a rotary sealing tool, is sufficient.
- the material web is folded onto itself in the region of the reinforcing strips to form longitudinal edges, so that the reinforcing strips are folded onto themselves there as well. It should also be included that the reinforcing strips are pre-folded prior to placing on the web, so that they can easily be folded over with the formation of the longitudinal edges.
- the folding of the material web takes place in such a way that the material web extends in the region of the reinforcing strips in the direction of the respective outer edge beyond the associated self-folded reinforcing strip, wherein subsequently the folded bag film directly bears on its inner surface between the outer edge and the respective reinforcing strip itself is heat sealed by a sealed seam.
- a first side of the reinforcing strip which is located on the outside in the folded state is additionally sealed with the material web, without the reinforcing strips being sealed with themselves in their second side lying on the inside in the folded state.
- the assignment of the outer first side of the reinforcing strips and the second folded side inwardly of the reinforcing strips refers only to the reinforcing strip itself.
- the entire reinforcing strips are arranged inside.
- the folded reinforcing strips are preferably sealed to the material web for the bag film in such a way that a respective bent edge of the reinforcing strips is cut out by a heat seal.
- transverse seals are formed and individual bags open at one end are cut off. These bags can then be stored and transported as prefabricated gusseted bags, the bags being filled and sealed subsequently at their open end.
- the bag according to the invention comprises according to the Fig. 1 opposite front walls 1, arranged between the front walls 1 side walls 2 and the front walls 1 with the side walls 2 connecting longitudinal edges 3, wherein the longitudinal edges 3 are reinforced by sealing seams 4.
- the bag is formed in the embodiment as a stand-up pouch and has in a conventional manner a bottom 5 and a top seal 6, which closes the bag at its top.
- the bag shown is designed as a gusseted bag, wherein the side walls 2 each have a longitudinally extending fold line 7 as gussets between the longitudinal edges 3.
- the bag can be pre-assembled and folded flat. The filling and the closure at the top seal seam 6 are then made later on a corresponding filling device.
- the bag Due to the reinforcement on the longitudinal edges 3, the bag has an overall increased dimensional stability, whereby the filling process is facilitated.
- a strip-shaped stiffening element 8 is provided on the inside of the bag, which extends in the transverse direction. By the stiffening element 8, the dimensional stability of the bag is further increased.
- the prefabricated, initially flattened bag can be opened easier and faster during handling in a filling device, whereby the entire filling process can be significantly accelerated.
- reinforcing strips 9, 9 ' are provided in the region of the longitudinal edges 3 for further reinforcement, which extend in the longitudinal direction of the bag and consist of a plastic film.
- a material section forming the associated front wall 1 and a material section forming the associated side wall 2 are directly connected to one another at the sealed seam 4, the associated reinforcing strip 9 covering a corner formed between the two material sections on the inside of the bag.
- the Fig. 3 shows a detailed view of this embodiment in the region of one of the longitudinal edges 3.
- the illustrated longitudinal edge 3 is formed as two further longitudinal edges 3 as a folding edge, which there preferably over the entire length of the bag extending seal seam 4 is designed as a blind seal, so not the closure of Bag but essentially serves only reinforcement.
- the entire bag is formed from a single web of material 10, wherein the edges of the material web 10 at the not shown in detail fourth longitudinal edge 3 'merged and according to the illustration of Fig. 3 are sealed together.
- the material web 10 consists of a preferably multilayer plastic film or a flexible laminate, which has at least one layer of a sealable plastic film.
- the bag film 10 has a multilayered construction and has on the inside of the bag a first heat-sealable film layer 11 and on the outside a second film layer 12 which is not heat-sealable or has at least a higher melting temperature than the first film layer 11.
- the first film layer 11 is preferably a polyolefin having a low melting point, for example PE.
- PET or BOPP may be provided as the second, outer film layer 12.
- additional intermediate layers can also be provided without restriction.
- reinforcing strip 9 is formed as a multilayer plastic film and has an outer heat-sealable layer 13 and an opposite layer 14 which is not heat-sealable or at least has a higher sealing temperature.
- the reinforcing strips are initially prefolded on themselves and then unfolded again to an angle of about 90 °, so as in the Fig. 4 represented, the reinforcing strip 9 on one side of the bend with the Material web 10 can be connected, including, for example, a rotary sealing tool can be provided.
- a rotary sealing tool can be provided in the formation of in Fig. 2 and Fig.
- the bag 10 shown below is provided that the web 10 is folded in the region of the reinforcing strip 9 to form longitudinal edges 3, 3 'in such a way that there the reinforcing strips 9 are folded onto itself and that the web 10 in the region of Reinforcing strip 9 in the direction of the respective outer edge 17 extends beyond the associated self-folded reinforcing strip 9, where subsequently between the outer edge 17 and the respective reinforcing strip 9, the folded web 10 is heat-sealed at its inner surface directly to itself by a sealed seam 4 and wherein a first side of the reinforcing strip 9 located in the folded state is additionally sealed to the material web 10 without the reinforcing strip 9 being sealed to itself at its second, inside folded side.
- the Fig. 5 shows a correspondingly folded on itself material web 10, wherein two opposite front walls 1 are formed with arranged therebetween side walls 2.
- the side walls 2 are formed as inwardly folded side gussets.
- a sealing tool 18 is indicated, with which at the longitudinal edges 3, 3 'sealing seams 4, 4' are generated, which are spaced from each other by a recess 19 in the sealing tool 18.
- the recess 19 is located exactly where the bend region of the reinforcing strip 9 is located.
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Description
Die Erfindung betrifft einen Beutel aus einem flexiblen Material mit gegenüberliegenden Frontwänden, zwischen den Frontwänden angeordneten Seitenwänden und die Frontwände mit den Seitenwänden verbindende Längskanten, wobei die Längskanten durch Siegelnähte und in Richtung der Längskanten verlaufende Verstärkungsstreifen versteift sind, wobei an den Längskanten jeweils ein die zugeordnete Frontwand bildender Materialabschnitt und ein die Seitenwand bildender Materialabschnitt an der Siegelnaht direkt miteinander verbunden sind. Bei dem flexiblen Material handelt es sich insbesondere um eine Kunststofffolie, vorzugsweise eine mehrschichtige Kunststofffolie. Unter den Begriff fallen ferner Verbundmaterialien mit einer siegelfähigen Schicht, z. B. Verbundmaterialien aus Folie und Papier sowie Folien mit Gewebeverstärkungen. Gegenstand der Erfindung sind auch Verfahren zur Herstellung solcher Beutel.The invention relates to a bag made of a flexible material with opposite front walls, arranged between the front walls side walls and the front walls with the side walls connecting longitudinal edges, wherein the longitudinal edges are stiffened by sealing seams and extending in the direction of the longitudinal edges reinforcing strips, wherein at the longitudinal edges in each case an associated Front wall forming material portion and a side wall forming material portion are directly connected to the sealed seam. The flexible material is in particular a plastic film, preferably a multilayer plastic film. The term also includes composite materials having a sealable layer, e.g. B. Composite materials of film and paper and films with fabric reinforcements. The invention also provides methods for producing such bags.
Die Beutel werden als Verpackungen beispielsweise für stückiges, körniges oder pulverförmige Schüttgut verwendet, die einen in etwa rechteckförmigen Querschnitt aufweisen. Die Beutel sind häufig durch Ausformung eines Bodens als Standbeutel ausgebildet. Unter die Erfindung sollen aber auch Beutel für Verpackungen fallen, die auf einer Seiten- oder Frontfläche liegend gelagert und aufeinander gestapelt werden können. In allen Fällen besteht das Problem, dass die Beutel sich aufgrund des darin enthaltenen Füllgutes an den Front - und Seitenwänden nach außen ausbeulen, wodurch der Beutelkörper deutlich verformt wird. Dies hat zur Folge, dass die Verpackung einen insgesamt wenig hochwertigen Eindruck erweckt. Durch die mangelnde Formstabilität wird auch eine platzsparende Lagerung erschwert und die Standfestigkeit beeinträchtigt. Um insgesamt die Festigkeit des Beutels zu erhöhen, kann vorgesehen sein, eine dickere Folie oder ein steiferes Material für die Bildung der Front- und Seitenwände zu verwenden. Dies ist jedoch mit einem deutlich höheren Materialaufwand und damit mit höheren Kosten und einer größeren Abfallmenge verbunden.The bags are used as packaging, for example, for particulate, granular or powdery bulk material, which have an approximately rectangular cross-section. The bags are often formed by forming a bottom as a stand-up pouch. Under the invention but also bags for packaging to fall, which can be stored lying on a side or front surface and stacked on each other. In all cases, there is the problem that the bags bulge outwardly due to the contents contained therein on the front and side walls, thereby significantly deforming the bag body. This has the consequence that the packaging gives an overall low-quality impression. Due to the lack of dimensional stability also a space-saving storage is difficult and impairs the stability. In order to increase the overall strength of the bag, it may be provided to use a thicker foil or a stiffer material for the formation of the front and side walls. However, this is associated with a significantly higher cost of materials and thus with higher costs and a larger amount of waste.
Um trotz einer an sich flexiblen Folie als Ausgangsmaterial eine hohe Formstabilität zu erreichen, ist aus der
Durch die bekannte, mit einem Verstärkungsstreifen verstärkte Ausführung kann die Formstabilität des Beutels deutlich erhöht werden. Jedoch besteht die Gefahr, dass bei dem Auftreten von Schälkräften die Siegelnähte an den jeweils auf sich selbst gefalteten Verstärkungsstreifen wieder aufgerissen werden. Solche Schälkräfte können beispielsweise auftreten, wenn bei einem Zusammendrücken des Beutels durch ein Übereinanderstapeln oder aufgrund kurzzeitiger Stöße, beispielsweise bei einem Fallenlassen des Beutels der Innendruck in dem Beutel ansteigt. Wenn bei der bekannten Ausführung des Beutels die Siegelnaht aufgetrennt wird, besteht die Gefahr, dass der Beutel dort unter Belastung vollständig aufplatzt. Obwohl der zusätzliche Verstärkungsstreifen eine Materialverstärkung darstellt, besteht diese Gefahr auch bei Blindsiegelnähten, da durch das Heißsiegeln und das Knicken des den Beutel bildenden Materials sowie des Verstärkungsstreifens Schwachstellen gebildet werden können. Ein Aufplatzen des Beutels soll möglichst auch bei extremen Krafteinwirkungen vermieden werden, da nicht nur das in dem beschädigten Beutel enthaltene Füllgut beeinträchtigt wird, sondern auch die Umgebung, beispielsweise gemeinsam gelagerte Beutel oder andere Güter, erheblich verschmutzt werden können.By known, reinforced with a reinforcing strip design, the dimensional stability of the bag can be significantly increased. However, there is a risk that the sealing seams are torn open again at the occurrence of peeling forces on the respective self-folded reinforcing strip. Such peel forces may occur, for example, if, upon compression of the bag by stacking or due to momentary shocks, for example, dropping the bag, the internal pressure in the bag increases. If in the known design of the bag, the seal is separated, there is a risk that the bag completely bursts under load. Although the additional reinforcing strip represents a material reinforcement, there is also a danger with blindseal seams because weak spots can be formed by heat sealing and buckling of the bag forming material as well as the reinforcing strip. A bursting of the bag should be avoided as possible even with extreme force effects, since not only the contents contained in the damaged bag is affected, but also the environment, such as collectively stored bags or other goods, can be significantly contaminated.
Aus der
Vor diesem Hintergrund liegt der Erfindung die Aufgabe zugrunde, einen Beutel mit den eingangs beschriebenen Merkmalen für Verpackungen anzugeben, die sich durch eine erhöhte mechanische Belastbarkeit, insbesondere eine höhere Fallfestigkeit, auszeichnen.Against this background, the invention has for its object to provide a bag with the features described above for packaging, the are characterized by an increased mechanical strength, in particular a higher fall resistance.
Gegenstand der Erfindung und Lösung dieser Aufgabe ist ein Beutel nach Anspruch 1.The object of the invention and solution of this problem is a bag according to
An den Längskanten sind jeweils ein die zugeordnete Frontwand bildender Materialabschnitt und ein die zugeordnete Seitenwand bildender Materialabschnitt an der Siegelnaht direkt miteinander verbunden. Erfindungsgemäß deckt der zugeordnete Verstärkungsstreifen an der Beutelinnenseite eine zwischen den beiden Materialabschnitten gebildete Ecke ab.At the longitudinal edges, respectively, a material portion forming the associated front wall and a material portion forming the associated side wall are directly connected to one another at the sealing seam. According to the invention, the associated reinforcing strip on the inside of the bag covers a corner formed between the two material sections.
Die an den Längskanten angeordnete Siegelnaht, welche die Materialabschnitte der Frontwand und der Seitenwand miteinander verbindet, ist an der Beutelinnenseite von den in Richtung der Längskanten verlaufenden Verstärkungsstreifen verdeckt und damit vor mechanischen Belastungen geschützt. Der Verstärkungsstreifen ist dabei seitlich der die Materialabschnitte verbindenden Siegelnaht sowohl mit der zugeordneten Frontwand als auch der zugeordneten Seitenwand verbunden. Während bei den aus dem Stand der Technik bekannten Ausführungen die Längskanten bei einer mechanischen Krafteinwirkung stark auf eine Schälung beansprucht werden, werden diese Schälkräfte gemäß der erfindungsgemäßen Ausgestaltung durch die Verstärkungsstreifen in Scherkräfte umgewandelt, wodurch eine deutlich höhere Belastbarkeit erreicht wird. Zusätzlich erfolgt eine gleichmäßige, großflächigere Kraftverteilung, so dass insgesamt die Stabilität des Beutels und insbesondere die Fallfestigkeit stark erhöht werden können.The seal seam arranged on the longitudinal edges, which connects the material sections of the front wall and the side wall, is concealed on the inside of the bag by the reinforcing strips running in the direction of the longitudinal edges and thus protected against mechanical loads. The reinforcing strip is connected at the side of the sealing seam connecting the material sections to both the associated front wall and the associated side wall. While in the embodiments known from the prior art, the longitudinal edges are strongly stressed in a mechanical force acting on a peeling, these peeling forces are converted according to the embodiment of the invention by the reinforcing strips in shear forces, whereby a significantly higher load capacity is achieved. In addition, there is a uniform, larger-area force distribution, so that overall the stability of the bag and in particular the drop resistance can be greatly increased.
Der Beutel weist als wesentlichen Bestandteil Kunststoff auf, wobei das zur Bildung des Beutels vorgesehene flexible Material zumindest an einer Seite heißsiegelbare Eigenschaften aufweisen muss, damit die Siegelnähte erzeugt werden können. Vorzugsweise besteht der Beutel aus einer Kunststofffolie. Bei einer mehrlagigen Ausgestaltung der zur Beutelherstellung vorgesehenen Folie soll aber nicht ausgeschlossen sein, dass bezogen auf den Schichtaufbau innen liegend oder an einer nicht zum Heißsiegeln vorgesehenen Seite der Folie eine dünne Metallschicht, eine metallisierte Kunststoffschicht, ein Gewebe einer Papierschicht und dergleichen vorgesehen ist.The bag has as an essential part plastic, wherein the bag provided for the formation of flexible material at least on one side must have heat sealable properties so that the seal seams can be produced. Preferably, the bag is made of a plastic film. In a multilayer configuration of the foil provided for bag production, however, it should not be ruled out that a thin metal layer, a metallized plastic layer, a tissue of a paper layer and the like is provided inside or on a non-heat sealing side of the foil.
Die Erfindung bezieht sich insbesondere auf Seitenfaltenbeutel, bei denen die Seitenwände als Seitenfalten mit jeweils einer zwischen den Längskanten verlaufenden Faltlinie ausgebildet sind. Bei Seitenfaltenbeuteln ergibt sich der Vorteil, dass diese zunächst vorkonfektioniert und erst später befüllt werden, wobei sowohl die noch nicht verschlossenen vorkonfektionierten Beutel als auch die nachfolgend befüllten und verschlossenen, vorzugsweise luft- und/ oder feuchtigkeitsdicht verschlossenen Beutel, von der vorliegenden Erfindung mit umfasst sind. Durch die Ausbildung von Seitenfalten können die Beutel mit eingeklappten Seitenfalten im flachgelegten Zustand leicht übereinander gestapelt und transportiert werden. Von Bedeutung ist dann zusätzlich, dass eine möglichst leichte Befüllung ermöglicht werden soll. Durch die erfindungsgemäß an den Längskanten vorgesehene Versteifung und die damit verbundene erhöhte Formfestigkeit kann leichter ein Einfülltrichter einer Befüllvorrichtung in den an einer Seite offenen, vorkonfektionierten Seitenfaltenbeutel eingeführt werden.The invention relates in particular to gusseted bags in which the side walls are formed as gussets, each with a fold line extending between the longitudinal edges. In the case of gusseted bags, there is the advantage that they are initially prefabricated and filled later, both the not yet sealed prefabricated bags and the subsequently filled and sealed, preferably air- and / or moisture-tight sealed bags are included in the present invention , By forming gussets the bags can be easily stacked and transported with folded gussets in the flat state. It is also important in addition that the lightest possible filling should be possible. By virtue of the stiffening provided according to the invention at the longitudinal edges and the associated increased dimensional stability, it is easier to introduce a filling funnel of a filling device into the prefastened side-folding bag which is open on one side.
Des Weiteren wurde in der Praxis beobachtet, dass an der Beutelinnenseite aufgesiegelte, in Querrichtung verlaufende Elemente wie Wiederverschlussstreifen zu einer weiteren Erhöhung der Formstabilität beitragen und somit die Befüllung zusätzlich erleichtern. Um sich diesen Effekt gezielt zu Nutze zu machen, ist gemäß einer bevorzugten Ausgestaltung der Erfindung vorgesehen, dass an der Beutelinnenseite ein in Querrichtung zu den Siegelnähten verlaufendes Versteifungselement in Form eines steifen Folienstückes vorgesehen ist, welches sich an einer der Seiten- oder Frontwände oder vorzugsweise im Wesentlichen um den gesamten Umfang erstreckt. Dabei kann es jedoch zweckmäßig sein, zumindest die Bereiche, in denen Siegelnähte erzeugt werden sollen, auszusparen. Der streifenförmige Abschnitt kann beispielsweise aus Polyethylen oder einer mehrschichtigen Folie, beispielsweise einem Polyethylenterephthalat/Polyethylen (PET/PE)-Verbund gebildet sein. Möglich ist auch eine Prägung dieses Versteifungselements, eine Prägung der Beutelwand und/oder eine Anordnung zusätzlicher Siegelnähte, um die Festigkeit weiter zu erhöhen. Bei vorkonfektionierten Beuteln, die erst nachträglich befüllt werden sollen, kann durch das zusätzliche Versteifungselement insbesondere eine bessere und schnellere Beutelöffnung der zunächst zusammengefalteten Bereiche der bereitgehaltenen Beutel erreicht werden, was besonders kurze Taktzeiten an Befüllungsanlagen ermöglicht. Dabei ist zu berücksichtigen, dass der Befüllvorgang selbst abhängig von dem Füllgut zum Teil sehr schnell erfolgen kann, wobei die gesamte Prozessgeschwindigkeit dann im Wesentlichen von der Handhabung des Beutels, also insbesondere auch dem Öffnungsverhalten des Beutels bestimmt wird.Furthermore, in practice, it has been observed in practice that transverse elements which are sealed on the inside of the bag, such as reclosing strips, contribute to a further increase in the dimensional stability and thus additionally facilitate the filling. In order to make targeted use of this effect, it is provided according to a preferred embodiment of the invention, a stiffening element running in the transverse direction of the sealing seams in the form of a stiff piece of film is provided on the inside of the bag, which extends on one of the side or front walls or preferably substantially around the entire circumference. However, it may be expedient to omit at least the areas in which sealing seams are to be produced. The strip-shaped section can be formed, for example, from polyethylene or a multilayer film, for example a polyethylene terephthalate / polyethylene (PET / PE) composite. It is also possible an embossing of this stiffening element, an embossment of the bag wall and / or an arrangement of additional sealing seams, to further increase the strength. In prefabricated bags that are to be filled later, can be achieved by the additional stiffening element in particular a better and faster bag opening of the initially folded areas of the bag held, which allows very short cycle times at filling systems. It should be noted that the filling itself can be done very quickly depending on the contents partially, the entire process speed is then essentially determined by the handling of the bag, so in particular the opening behavior of the bag.
Im Rahmen der Erfindung ist grundsätzlich nicht ausgeschlossen die Front- und Seitenwände jeweils aus separaten Materialzuschnitten, z. B. Folienzuschnitten zu bilden, die dann an den Längskanten miteinander verbunden sind. Bevorzugt ist jedoch eine Ausgestaltung, bei der der Beutel durch Falten und Heißsiegeln aus einer Materialbahn gebildet ist, wobei dann die Längskanten zumindest zum Teil als Faltkanten ausgebildet sind. Die Ränder der Materialbahn können zur Bildung eines umfangsseitig geschlossenen Schlauchs entweder an einer der Front- oder Seitenwände oder auch an einer der Längskanten miteinander verbunden sein. Im ersten Fall können alle Siegelnähte an den Längskanten als Blindsiegelnähte, in dem zweiten Fall an drei der vier Längskanten als Blindsiegelnähte ausgebildet sein. Unter Blindsiegelnaht wird dabei im Rahmen der Erfindung eine Siegelnaht verstanden, die nicht zum Verschluss des Beutels, sondern im Wesentlichen nur zu dessen Versteifung vorgesehen ist. Eine vollständige Dichtheit der Blindsiegelnähte ist deshalb auch nicht zwingend erforderlich. Die Blindsiegelnähte müssen sich auch nicht über die gesamte Länge des Beutels erstrecken. Zum Erreichen der erfindungsgemäßen Wirkung ist es ausreichend, wenn sich die Blindsiegelnähte und die in diesem Bereich in Längsrichtung verlaufenden Verstärkungsstreifen über den größten Teil der Beutellänge erstrecken. Zusätzlich ist es auch möglich, die Längskanten zumindest zum Teil als Faltkanten auszubilden und dann zu besäumen, das heißt nach der Bildung der Siegelnähte jeweils einen äußeren Rand abzuschneiden. Eine Besäumung kann insbesondere aus optischen Gründen vorgesehen sein.In the context of the invention is not excluded in principle the front and side walls each of separate material blanks, z. B. film blanks, which are then connected to each other at the longitudinal edges. However, an embodiment is preferred in which the bag is formed by folding and heat sealing from a material web, wherein the longitudinal edges are then formed at least partially as folding edges. The edges of the material web can be connected to one another to form a circumferentially closed tube either on one of the front or side walls or on one of the longitudinal edges. In the first case, all sealing seams at the longitudinal edges as Blind seal seams, in the second case be formed on three of the four longitudinal edges as blind seal seams. In the context of the invention, blind seal seam is understood to mean a sealed seam which is not provided for closing the pouch, but essentially only for its stiffening. A complete tightness of the blind seals is therefore not absolutely necessary. The blind seals also need not extend the entire length of the bag. To achieve the effect of the present invention, it is sufficient if the blind seals and the reinforcing strips extending in the longitudinal direction extend over most of the length of the bag. In addition, it is also possible to form the longitudinal edges, at least in part, as folding edges and then to trimming them, that is to say to cut off an outer edge after the formation of the sealing seams. A trimming can be provided in particular for optical reasons.
Bei dem erfindungsgemäßen Beutel sind die Front- und Seitenwände vorzugsweise aus einer mehrschichtigen Folie gebildet, wobei die Folie an der Beutelinnenseite eine erste heißsiegelbare Folienschicht und an der Außenseite eine zweite Folienschicht, die nicht heißsiegelbar ist oder zumindest eine höhere Schmelztemperatur als die erste Folienschicht hat, aufweist. Wie zuvor erläutert, kann insbesondere der gesamte Beutel durch Falten und Heißsiegeln aus einer einzigen Material- bzw. Folienbahn gebildet sein. Geeignet sind beispielsweise mehrschichtige Laminate, die eine innen liegende heißsiegelbare Schicht aus einem Polyolefin, insbesondere Polyethylen (PE), und eine außen liegende Schicht aus einem Polyester, insbesondere Polyethylenterephthalat (PET), aufweisen. Dazwischen können optional Verbindungs- und Funktionsschichten aus Kunststoff oder aber auch dünne Metallschichten vorgesehen sein, um insbesondere die Barriereeigenschaften zu verbessern. Des Weiteren kann zur Bildung des Beutels auch ein Folienlaminat oder eine Coextrusionsfolie vorgesehen sein, die vollständig aus Polyolefin besteht. Bei einer innen liegenden, heißsiegelbaren ersten Folienschicht aus Polyethylen ist für die zweite an der Außenseite angeordnete Folienschicht beispielsweise ein biaxial orientiertes Polypropylen (BOPP) geeignet.In the bag according to the invention, the front and side walls are preferably formed from a multilayer film, wherein the film on the inside of the bag a first heat-sealable film layer and on the outside a second film layer which is not heat-sealable or at least has a higher melting temperature than the first film layer, having. As explained above, in particular the entire bag can be formed by folding and heat sealing from a single material or foil web. Suitable examples are multilayer laminates which have an inner heat-sealable layer of a polyolefin, in particular polyethylene (PE), and an outer layer of a polyester, in particular polyethylene terephthalate (PET). In between, optional connecting and functional layers made of plastic or even thin metal layers may be provided, in particular to improve the barrier properties. Furthermore, a film laminate or a coextrusion film which consists entirely of polyolefin may also be provided to form the bag. For an inside, For example, a biaxially oriented polypropylene (BOPP) is suitable for the second film layer disposed on the outside of heat-sealable first film layer made of polyethylene.
Im Rahmen der Erfindung decken die Verstärkungsstreifen an der Beutelinnenseite jeweils die zwischen den beiden angrenzenden Materialabschnitten gebildete Ecke. Es werden bevorzugt mehrschichtig ausgebildete Verstärkungsstreifen eingesetzt, wobei eine außen liegende heißsiegelbare Schicht an der zugeordneten Frontwand sowie der zugeordneten Seitenwand festgesiegelt wird und wobei die gegenüberliegende Schicht nicht heißsiegelbar ist oder zumindest eine höhere Schmelztemperatur aufweist. Wie nachfolgend noch erläutert wird, können die Verstärkungsstreifen auf besonders einfache Weise an den angrenzenden Materialabschnitten befestigt werden, wenn der Beutel zusammengefaltet ist. Dabei muss jedoch vermieden werden, dass die dann auf sich gefalteten Verstärkungsstreifen innen liegend verkleben, also mit sich selbst versiegelt werden.In the context of the invention, the reinforcing strips on the inside of the bag each cover the corner formed between the two adjacent material sections. Multilayered reinforcing strips are preferably used, wherein an outer heat-sealable layer is sealed to the associated front wall and the associated side wall and wherein the opposite layer is not heat-sealable or at least has a higher melting temperature. As will be explained below, the reinforcing strips can be fastened to the adjacent material sections in a particularly simple manner when the bag is folded up. However, it must be avoided that the then folded on reinforcing strips stick inside, so are sealed with itself.
Es ist von Vorteil, wenn an den Längskanten jeweils der dort vorgesehene Verstärkungsstreifen mit Siegelnähten an der zugeordneten Frontwand sowie der zugeordneten Seitenwand befestigt ist, wobei diese Siegelnähte in einem Abstand zu der Siegelnaht verlaufen, die an der betrachteten Längskante den Materialabschnitt der Frontwand mit dem Materialabschnitt der Seitenwand direkt verbindet.It is advantageous if at the longitudinal edges of each provided there reinforcing strip with sealing seams on the associated front wall and the associated side wall is attached, these sealing seams at a distance from the sealing seam, at the longitudinal edge considered the material portion of the front wall with the material portion the side wall connects directly.
Dabei wird genau der mittlere Knickbereich des Verstärkungsstreifens ausgespart. Dadurch wird vermieden, dass durch das Siegeln neue Schwachstellen entstehen. Mechanische Belastungen werden so auch in einem gewissen Maße von dem Knick als Schwachstelle und der dahinter angeordneten Verbindung von Front- und Seitenwand ferngehalten.In this case, exactly the middle bending region of the reinforcing strip is recessed. This avoids that new vulnerabilities are created by the sealing. Mechanical loads are thus also kept to a certain extent by the kink as a weak point and the connection arranged behind the front and side wall.
Gegenstand der Erfindung ist auch ein Verfahren nach Anspruch 7 zur Herstellung eines Beutels.The invention also provides a method according to
Gemäß dem erfindungsgemäßen Verfahren wird eine Materialbahn zugeführt, wobei dann Verstärkungsstreifen in einem Abstand zueinander auf die Materialbahn aufgelegt und mit der Materialbahn verbunden werden. In diesem Verfahrensschritt bleiben die Verstärkungsstreifen zumindest an der Hälfte ihrer Breite unverbunden, wobei zunächst eine Vorfixierung der Verstärkungsstreifen, beispielsweise durch ein Rotations-Siegelwerkzeug, ausreichend ist.According to the method of the invention, a material web is fed, in which case reinforcing strips are placed on the material web at a distance from one another and connected to the material web. In this method step, the reinforcing strips remain unconnected at least at half their width, wherein initially a prefixing of the reinforcing strips, for example by a rotary sealing tool, is sufficient.
Die Materialbahn wird im Bereich der Verstärkungsstreifen zur Bildung von Längskanten derart auf sich selbst gefaltet, dass dort auch die Verstärkungsstreifen auf sich selbst gefaltet sind. Dabei soll auch mit umfasst sein, dass die Verstärkungsstreifen vor dem Auflegen auf die Materialbahn vorgefaltet werden, so dass diese bei der Bildung der Längskanten leicht mit umgeknickt werden können. Die Faltung der Materialbahn erfolgt dabei so, dass die Materialbahn sich im Bereich der Verstärkungsstreifen in Richtung der jeweiligen Außenkante über den zugeordneten auf sich selbst gefalteten Verstärkungsstreifen hinaus erstreckt, wobei nachfolgend zwischen der Außenkante und dem jeweiligen Verstärkungsstreifen die gefaltete Beutelfolie an ihrer Innenfläche unmittelbar mit sich selbst durch eine Siegelnaht heißgesiegelt wird. Erfindungsgemäß wird dabei eine im gefalteten Zustand außen liegende erste Seite des Verstärkungsstreifens zusätzlich mit der Materialbahn versiegelt, ohne dass die Verstärkungsstreifen in ihrer zweiten, im gefalteten Zustand innen liegenden Seite mit sich selbst versiegelt werden. Die Zuordnung der außen liegenden ersten Seite der Verstärkungsstreifen und der im gefalteten Zustand innen liegenden zweiten Seite der Verstärkungsstreifen bezieht sich nur auf den Verstärkungsstreifen selbst. Bezogen auf den aus der Beutelfolie gebildeten Folienschlauch sind die gesamten Verstärkungsstreifen innen liegend angeordnet. Erfindungsgemäß werden die gefalteten Verstärkungsstreifen bevorzugt derart mit der Materialbahn für die Beutelfolie versiegelt, dass jeweils eine Knickkante der Verstärkungsstreifen von einer Heißsiegelung ausgespart wird. Wie zuvor beschrieben ergibt sich daraus der Vorteil, dass mit einer solchen Verfahrensführung eine besonders hohe Festigkeit der Beutel an den Längskanten erreicht werden kann.The material web is folded onto itself in the region of the reinforcing strips to form longitudinal edges, so that the reinforcing strips are folded onto themselves there as well. It should also be included that the reinforcing strips are pre-folded prior to placing on the web, so that they can easily be folded over with the formation of the longitudinal edges. The folding of the material web takes place in such a way that the material web extends in the region of the reinforcing strips in the direction of the respective outer edge beyond the associated self-folded reinforcing strip, wherein subsequently the folded bag film directly bears on its inner surface between the outer edge and the respective reinforcing strip itself is heat sealed by a sealed seam. According to the invention, a first side of the reinforcing strip which is located on the outside in the folded state is additionally sealed with the material web, without the reinforcing strips being sealed with themselves in their second side lying on the inside in the folded state. The assignment of the outer first side of the reinforcing strips and the second folded side inwardly of the reinforcing strips refers only to the reinforcing strip itself. Based on the film tube formed from the bag film, the entire reinforcing strips are arranged inside. According to the invention, the folded reinforcing strips are preferably sealed to the material web for the bag film in such a way that a respective bent edge of the reinforcing strips is cut out by a heat seal. As described above, this results in the advantage that a particularly high strength of the bags at the longitudinal edges can be achieved with such a process control.
Üblicherweise werden nach dem Falten und Erzeugen von Siegelnähten Quersiegelungen gebildet sowie einzelne an einem Ende offene Beutel abgetrennt. Diese Beutel können sodann als vorkonfektionierte Seitenfaltenbeutel gelagert und transportiert werden, wobei die Beutel erst nachfolgend an ihrem offenen Ende befüllt und verschlossen werden.Usually, after sealing and producing sealing seams, transverse seals are formed and individual bags open at one end are cut off. These bags can then be stored and transported as prefabricated gusseted bags, the bags being filled and sealed subsequently at their open end.
Die Erfindung wird im Folgenden anhand von Ausführungsbeispielen erläutert. Es zeigen schematisch:
- Fig. 1
- einen Beutel, der an seinen Längskanten verstärkt ist,
- Fig. 2
- den erfindungsgemäßen Beutels in einem horizontalen Schnitt,
- Fig. 3
- eine Detailansicht des Ausschnitts A der
Fig. 2 , - Fig. 4
- einen Verfahrensschritt zur Befestigung von Verstärkungsstreifen auf einer Materialbahn, und
- Fig. 5
- die Bildung von verstärkten Längskanten durch Heißsiegeln.
- Fig. 1
- a bag reinforced at its longitudinal edges,
- Fig. 2
- the bag according to the invention in a horizontal section,
- Fig. 3
- a detailed view of the section A of
Fig. 2 . - Fig. 4
- a method step for fixing reinforcing strips on a material web, and
- Fig. 5
- the formation of reinforced longitudinal edges by heat sealing.
Der erfindungsgemäße Beutel umfasst gemäß der
Erfindungsgemäß sind im Bereich der Längskanten 3 Verstärkungsstreifen 9, 9' zur weiteren Verstärkung vorgesehen, die in Längsrichtung des Beutels verlaufen und aus einer Kunststofffolie bestehen.According to the invention, reinforcing
Gemäß
Die
Der gesamte Beutel ist aus einer einzigen Materialbahn 10 gebildet, wobei die Ränder der Materialbahn 10 an der nicht im Detail dargestellten vierten Längskante 3' zusammengeführt und entsprechend der Darstellung der
Der Detailansicht der
Während bei den aus dem Stand der Technik bekannten Ausführungen ein Überdruck in dem Beutel, der beispielsweise bei einem Fallenlassen des Beutels stoßweise entstehen kann, die Siegelnaht 4 zwischen dem die Frontwand 1 bildenden Materialabschnitt und dem die Seitenwand 2 bildenden Materialabschnitt auf Schälung beansprucht, ist diese Siegelnaht 4 erfindungsgemäß von dem Verstärkungsstreifen 9 abgedeckt und damit geschützt. Bei einer Kraftbeanspruchung werden die Siegelnähte 4', welche den Verstärkungsstreifen 9 mit der Beutelfolie 10 verbinden, auf Scherung beansprucht, wobei zusätzlich eine großflächige Verteilung der einwirkenden Kraft erzeugt wird. Durch die Kombinationen dieser Maßnahmen wird im Bereich der Längskanten 3, 3' die Stabilität und insbesondere die Fallfestigkeit maßgeblich erhöht. Die Beutel können so für eine höhere Belastung ausgelegt werden. Schließlich ergibt sich auch der Vorteil, dass gegenüber den aus dem Stand der Technik bekannten Ausführungen selbst bei der Verwendung einer dünneren Beutelfolie eine gleichbleibende oder sogar erhöhte Fallfestigkeit erreicht werden kann, da die Längskanten 3, 3' wegen der erfindungsgemäßen Ausgestaltung nicht mehr wie bei den bekannten Beuteln eine die gesamte Festigkeit begrenzende Schwachstelle darstellen.While in the known from the prior art embodiments, an overpressure in the bag, which may occur intermittently, for example, when dropping the bag, the
Die Beutelfolie 10 ist mehrschichtig ausgebildet und weist an der Beutelinnenseite eine erste heißsiegelbare Folienschicht 11 und an der Außenseite eine zweite Folienschicht 12, die nicht heißsiegelbar ist oder zumindest eine höhere Schmelztemperatur als die erste Folienschicht 11 hat, auf. Als erste Folienschicht 11 wird bevorzugt ein Polyolefin mit einem niedrigen Schmelzpunkt, beispielsweise PE, eingesetzt. Als zweite, außen liegende Folienschicht 12 kann beispielsweise PET oder BOPP vorgesehen sein. Zwischen der ersten Folienschicht 11 und der zweiten Folienschicht 12 können ohne Einschränkung auch zusätzliche Zwischenschichten vorgesehen sein.The
Auch der in der
Um den in
Die
Claims (9)
- A bag of a flexible material with opposing front walls (1), side walls (2) arranged between the front walls (1) and the longitudinal edges (3, 3') connecting the front walls (1) with the side walls (2), wherein the longitudinal edges (3, 3') are stiffened by sealing seams (4) and reinforcement strips (9) extending in direction of the longitudinal edges (3, 3'), and wherein on the longitudinal edges (3, 3') a material portion forming the associated front wall (1) and a material portion forming the associated side wall (2), respectively, are directly connected with each other, characterised in that the associated reinforcement strip (9) on the inside of the bag covers a corner formed between the two material portions, and in that on the longitudinal edges (3, 3') the respectively provided reinforcement strip (9) is fastened with sealing seams (4') on the associated front wall (1) and the associated side wall (2), wherein these sealing seams (4') extend at a distance from the sealing seam (4'), which on the regarded longitudinal edge (3, 3') directly connects the material portion of the front wall (1) with the material portion of the side wall (2).
- The bag according to claim 1, characterised in that the reinforcement strips (9) are respectively constructed of several layers, wherein an outer heat-sealable layer (13) is sealed fast to the associated front wall (1) and the associated side wall (2), and wherein the opposite layer (14) is not heat-sealable or at least has a higher melting temperature.
- The bag according to claim 1 or 2, characterised in that the front and side walls (1, 2) are formed of a multi-layer composite material, wherein the composite material has a first heat-sealable layer (11) on the inside of the bag and a second layer (12), which is not heat-sealable or at least has a higher melting temperature than the first layer (11), on the outside.
- The bag according to one of claims 1 to 3, characterised in that the sealing seams (4) are at least partially formed as blind sealing seams.
- The bag according to one of claims 1 to 4, characterised in that the bag is formed from a material web (10) by folding and heat-sealing.
- The bag according to one of claims 1 to 5, characterised by a stiffening element (8) which extends in transverse direction to the sealing seams (4).
- A method for manufacturing a bag from a flexible material, wherein:a material web is fed, onto which reinforcement strips (9) are placed at a distance to each other;the reinforcement strips (9) are pre-folded onto themselves and are connected with the material web on one side of the bent edge;the material web (10), in the area of the reinforcement strips (9), is folded onto itself for forming longitudinal edges (3, 3') such that at this point the longitudinal edges (3, 3') are also folded onto themselves, and in that the material web (10), in the area of the reinforcement strips (9), extends in direction of a respective outer edge (17) beyond the associated reinforcement strip (9) folded onto itself;the folded material web is subsequently heat-sealed with itself by a sealing seam (4) on its inside surface between the outer edge (17) and the reinforcement strip (9);a first side of the reinforcement strip (9), which in the folded state lies on the outside, is additionally sealed with the material web (10), without the reinforcement strip (9) being sealed to itself on its second side which in the folded state lies on the inside.wherein the folded reinforcement strips (9) are sealed with the material web (10) such that the bent edge of the reinforcement strips (9), respectively, is omitted from the heat-sealing.
- The method according to claim 7, wherein following folding and producing of sealing seams (4) transverse sealings are formed and individual bags are separated which are open at one end.
- The method according to claim 8, wherein the bags are filled at their open ends and then closed.
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EP20090010503 EP2284090B1 (en) | 2009-08-14 | 2009-08-14 | Bag and method for its production |
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EP20090010503 EP2284090B1 (en) | 2009-08-14 | 2009-08-14 | Bag and method for its production |
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EP2284090B1 true EP2284090B1 (en) | 2013-02-27 |
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EP3954623A1 (en) | 2020-08-14 | 2022-02-16 | Mondi AG | Paper packaging bag and method for producing a packaging bag |
EP3792192B1 (en) * | 2019-09-16 | 2023-08-09 | Mondi AG | Packaging bag assembly and method for manufacturing and handling the packaging bag assembly |
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US20160059995A1 (en) * | 2014-08-27 | 2016-03-03 | Nestec S.A. | Flexible pouch with memory support strips and methods of producing and using same |
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JPH0427782Y2 (en) * | 1986-03-18 | 1992-07-03 | ||
DE4203798C2 (en) * | 1992-02-10 | 1999-07-15 | Rovema Gmbh | Method and device for producing a tubular bag |
US6065873A (en) | 1999-03-01 | 2000-05-23 | Fowler; Margaret E. | Foldable self-standing carry-all |
JP5000184B2 (en) * | 2006-04-17 | 2012-08-15 | 株式会社生産日本社 | Plastic bag body |
-
2009
- 2009-08-14 EP EP20090010503 patent/EP2284090B1/en not_active Not-in-force
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3792192B1 (en) * | 2019-09-16 | 2023-08-09 | Mondi AG | Packaging bag assembly and method for manufacturing and handling the packaging bag assembly |
EP3954623A1 (en) | 2020-08-14 | 2022-02-16 | Mondi AG | Paper packaging bag and method for producing a packaging bag |
DE102020004962A1 (en) | 2020-08-14 | 2022-02-17 | Mondi Ag | Paper-based packaging bag and method for manufacturing a packaging bag |
Also Published As
Publication number | Publication date |
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EP2284090A1 (en) | 2011-02-16 |
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