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EP1714904B1 - Side-folded bag - Google Patents

Side-folded bag Download PDF

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Publication number
EP1714904B1
EP1714904B1 EP05405307A EP05405307A EP1714904B1 EP 1714904 B1 EP1714904 B1 EP 1714904B1 EP 05405307 A EP05405307 A EP 05405307A EP 05405307 A EP05405307 A EP 05405307A EP 1714904 B1 EP1714904 B1 EP 1714904B1
Authority
EP
European Patent Office
Prior art keywords
bag
sealing seam
seam
face
side gusset
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
EP05405307A
Other languages
German (de)
French (fr)
Other versions
EP1714904A1 (en
Inventor
John Dixon
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.)
3A Composites International AG
Original Assignee
Alcan Technology and Management Ltd
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 Alcan Technology and Management Ltd filed Critical Alcan Technology and Management Ltd
Priority to DE502005005188T priority Critical patent/DE502005005188D1/en
Priority to ES05405307T priority patent/ES2309699T3/en
Priority to EP05405307A priority patent/EP1714904B1/en
Priority to PL05405307T priority patent/PL1714904T3/en
Publication of EP1714904A1 publication Critical patent/EP1714904A1/en
Application granted granted Critical
Publication of EP1714904B1 publication Critical patent/EP1714904B1/en
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Anticipated expiration legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D75/00Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52Details
    • B65D75/58Opening or contents-removing devices added or incorporated during package manufacture
    • B65D75/5861Spouts
    • B65D75/5866Integral spouts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D75/00Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/008Standing pouches, i.e. "Standbeutel"

Definitions

  • the invention relates to a side gusseted bag having a bottom wall and bag walls comprising a front wall, a rear wall and two side walls made of a flexible film-shaped bag material, the bag walls forming a hose, the hose having a longitudinal sealing seam which seals against the inside of the bag material the bottom is sealed by an inner side against the inside of the bag material sealing lower transverse seam and at the other end on the inside against the inside of the bag material sealing top transverse seam, and wherein the bag side walls at least in the transverse sealing seams to gussets with inwardly directed, the bag side walls in two Side fold halves dividing folding edge are formed.
  • gusset bags made of flexible film material are widely used today as packaging for liquid and free-flowing or pourable solid products of all kinds.
  • Known gusseted bags are designed as tubular bags with a arranged on a broad side of the bag longitudinal sealing seam and have, for example, a block bottom. All bags have in common the formation of a tightly closed Gregutraumes, which is formed by sealing the flexible film material against itself to form inseparable transverse sealing seams.
  • Side gusset bags are commonly manufactured, filled and sealed by means of vertical form-fill-seal (FFS) machines today.
  • FFS vertical form-fill-seal
  • pouches To remove the contents of such bags are torn, for example, transverse to the seal or cut at a designated point with a pair of scissors. Often, pouches also have an opening aid in the form of a tear notch located in the seal seam.
  • a major disadvantage of the known gusseted bag is that it is often difficult to open the bag in a simple manner and to close again.
  • US-A-5,392,589 discloses a side gusset bag having an opening tab integrated into the longitudinal seal after correspondingly trimming the longitudinal seal after fabrication of a longitudinal seal.
  • the invention has for its object to provide a bag of the type mentioned above, which allows in a simple manner without excessive force and without mechanical aids the formation of a reclosable pouring spout.
  • the opening tab is sealed in the longitudinal sealing seam and the bag material is coated on the inside of the bag with a sealing layer.
  • the sealant layer may be any suitable sealable coating, and is preferably made of a polyolefin-based plastic such as polyethylene or polypropylene.
  • any suitable plastic material may be used as the bag material, especially as a laminate in conjunction with other plastic films, for example of polyester, polyamide or oriented polypropylene, metal foils, e.g. Aluminum foils, or paper.
  • a suitable bag material comprises an optionally printed plastic film of polyester, polyamide or oriented polypropylene, in particular as a laminate in conjunction with other plastic films, metal foils, such as aluminum foils, or paper, with a sealing layer of a polyolefin-based plastic, for example polyethylene or polypropylene
  • An in Fig. 1 illustrated gusseted bag 10 has a block bottom 12 of rectangular cross-section and is thus configured as a stand-up pouch. From the two longitudinal sides of the block bottom 12 protrude two bag walls as a bag front wall 14 and bag rear wall 24. Bag front wall 14 and bag rear wall 24 are connected via two upstanding from the block bottom 12 side walls 16, 26 with each other.
  • the gusseted bag 10 consists of a flexible film-shaped material, which is formed via a longitudinal sealing seam 34 to a hose formed from the bag front wall 14, the bag rear wall 24 and the side walls 16, 26.
  • the longitudinal seam 34 extends in one of the bag sidewalls 16,26, in the illustrated example in the sidewall 16.
  • the bag sidewalls 16,26 Prior to attaching transverse seal seams 36,38, the bag sidewalls 16,26 are formed into gussets having a central, inwardly directed crease edge 18,28.
  • the folded edges 18, 28 divide each of the bag side walls 16, 26 into two side fold halves 20, 22 and 30, 32, respectively.
  • the longitudinal seal seam 34 projects outwardly in the bag side wall 16 from the fold edge 18 between the side fold halves 20, 22.
  • the adjacent inner sides of the bag front wall 14 and the bag rear wall 24 are sealed against each other.
  • a first marginal section B the adjacent inner surfaces of the bag front wall 14 and the one side fold half 20 of the bag side wall 16 and the bag rear wall 24 and the other side fold half 22 are sealed against each other.
  • a second edge region C the adjacent inner surfaces of the bag front wall 14 and the one side fold half 30 of the bag side wall 26 and the bag rear wall 24 and the other side fold half 32 of the bag side wall 26 are sealed against each other.
  • Also arranged in the region of the block bottom 12 lower transverse seam 36 has the above-described sections A, B and C, and the adjacent and sealed against each other bag parts are identical to those in the upper transverse sealing seam 38th
  • the seals of the inner sides of the bag in the sections A, B and C have different degrees of peel strength.
  • the seals in sections A and C have, like the seals in the lower transverse seam 36, a very high peel strength.
  • the seals are virtually inseparable welded together over the length of sections A and C.
  • section B the seals on the inside of the bag, i. the seals between the inside of the bag front wall 14 and the inside of the gusset half 20 and between the bag back wall 24 and the inside of the gusset half 22, good peel properties.
  • the seal of the bag outer sides in section C i.
  • the seal between the outside of the side fold half 30 of the bag front wall 14 and the outside of the side fold half 32 of the bag rear wall 24 has, like the seals in the lower transverse seal 36, a very high peel strength.
  • the seal of the bag outer sides in section B i. the seal between the outside of the gusset half 20 of the bag front wall 14 and the outside of the gusset half 22 of the bag back wall 24 has good peel properties, or the bag outer sides in the section B are not sealed at all.
  • the sealed against each other in section B bag wall parts can be exfoliated by pulling on the longitudinal sealing seam 34 below the upper transverse seam 38 without great effort of each other.
  • the folding edge 18 of the gusset side of the bag side wall 16 is pulled to the complete separation of the gusset halves 20, 22 from the bag front wall 14 and the bag rear wall 24 to the outside.
  • Fig. 4 represented leads the Separation of the inside seals in section B in the upper transverse seam 38 to a pouring opening 42 for a liquid or free-flowing medium.
  • the spout can be partially closed again when using a sufficiently rigid bag material.
  • a pressure sensitive adhesive coated closure strip, clip, or equivalent device may be used to produce a more secure reclosure.
  • an opening tab 40 is sealed into the longitudinal sealing seam 34 directly below the upper transverse sealing seam 38.
  • the opening tab 40 consists in the present example of an in Fig. 3 shown loop of a flexible film-shaped material. Instead of a loop, a simple strip of material or, for example, an injection-molded part can also be used.
  • the only condition of the material provided for the opening tab 40 is its compatibility with the sealing layer on the inside of the bag material with regard to the sealing properties. If, for example, the bag material consists of a polyester with an inside sealing layer of polyethylene (PE), then the opening tab 40 can be, for example, a thick film with the layer sequence PE / polyester / PE or an injection-molded part based on PE.
  • PE polyethylene
  • the different peel strength in section B over the sections A and C in the top transverse seam 38 can be achieved by using appropriate materials that produce different peel strengths at different sealing temperatures.
  • the sealing jaws are designed for this purpose so that they can be heated at different locations to different temperatures.
  • the sealing takes place at a first temperature, to form an inseparable compound, ie a compound with a very high peel strength, at a higher second temperature than the first temperature.
  • paints or other coatings which lead to a stronger or weaker seal.
  • Such paints are applied as register printing at predetermined locations in registration with a printing of the bag.
  • the registration with the printing of the bag on a packaging machine allows an accurate positioning of the areas to be provided on the finished bag with a lacquer.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)

Description

Die Erfindung betrifft einen Seitenfaltenbeutel mit einem Boden und von diesem aufragenden, eine Vorderwand, eine Rückwand und zwei Seitenwände umfassenden Beutelwänden aus einem flexiblen folienförmigen Beutelmaterial, wobei die Beutelwände einen Schlauch bilden, der Schlauch eine Innenseite gegen Innenseite des Beutelmaterials siegelnde Längssiegelnaht aufweist, im Bereich des Bodens über eine Innenseite gegen Innenseite des Beutelmaterials siegelnde untere Quersiegelnaht und am anderen Ende über eine Innenseite gegen Innenseite des Beutelmaterials siegelnde obere Quersiegelnaht verschlossen ist, und wobei die Beutelseitenwände zumindest im Bereich der Quersiegelnähte zu Seitenfalten mit nach innen gerichteter, die Beutelseitenwände in je zwei Seitenfaltenhälften unterteilende Faltkante geformt sind.The invention relates to a side gusseted bag having a bottom wall and bag walls comprising a front wall, a rear wall and two side walls made of a flexible film-shaped bag material, the bag walls forming a hose, the hose having a longitudinal sealing seam which seals against the inside of the bag material the bottom is sealed by an inner side against the inside of the bag material sealing lower transverse seam and at the other end on the inside against the inside of the bag material sealing top transverse seam, and wherein the bag side walls at least in the transverse sealing seams to gussets with inwardly directed, the bag side walls in two Side fold halves dividing folding edge are formed.

Seitenfaltenbeutel aus flexiblem Folienmaterial sind heute als Verpackung für flüssige und schütt- oder rieselfähige feste Füllgüter aller Art weit verbreitet. Bekannte Seitenfaltenbeutel sind als Schlauchbeutel mit einer auf einer Breitseite des Beutels angeordneten Längssiegelnaht ausgestaltet und weisen beispielsweise einen Blockboden auf. Allen Beuteln gemeinsam ist die Bildung eines dicht verschlossenen Füllgutraumes, der durch Siegeln des flexiblen Folienmaterials gegen sich selbst unter Ausbildung untrennbarer Quersiegelnähte entsteht. Seitenfaltenbeutel werden heute üblicherweise auf vertikalen Form-Füll-Siegel-(FFS)-Maschinen hergestellt, abgefüllt und durch Siegelung verschlossen.Side gusset bags made of flexible film material are widely used today as packaging for liquid and free-flowing or pourable solid products of all kinds. Known gusseted bags are designed as tubular bags with a arranged on a broad side of the bag longitudinal sealing seam and have, for example, a block bottom. All bags have in common the formation of a tightly closed Füllgutraumes, which is formed by sealing the flexible film material against itself to form inseparable transverse sealing seams. Side gusset bags are commonly manufactured, filled and sealed by means of vertical form-fill-seal (FFS) machines today.

Zur Entnahme des Füllgutes werden derartige Beutel beispielsweise quer zur Siegelnaht aufgerissen oder an einer hierfür bezeichneten Stelle mit einer Schere aufgeschnitten. Oft weisen Beutel auch eine Öffnungshilfe in der Form einer in der Siegelnaht angeordneten Einreisskerbe auf.To remove the contents of such bags are torn, for example, transverse to the seal or cut at a designated point with a pair of scissors. Often, pouches also have an opening aid in the form of a tear notch located in the seal seam.

Ein wesentlicher Nachteil der bekannten Seitenfaltenbeutel liegt darin, dass es oft schwierig ist, den Beutel auf einfache Weise zu öffnen und wieder zu verschliessen.A major disadvantage of the known gusseted bag is that it is often difficult to open the bag in a simple manner and to close again.

US-A-5 392 589 offenbart einen Seitenfaltenbeutel mit einer nach der Herstellung einer Längssiegelnaht durch entsprechendes Beschneiden derselben in die Längssiegelnaht integrierten Öffnungslasche. US-A-5,392,589 discloses a side gusset bag having an opening tab integrated into the longitudinal seal after correspondingly trimming the longitudinal seal after fabrication of a longitudinal seal.

Aus US-A 5 871 146 ist eine im Ausgussbereich eines Milchkartons befestigte Öffnungslasche bekannt.Out US Pat. No. 5,871,146 a known in the spout area of a milk carton opening tab is known.

Der Erfindung liegt die Aufgabe zugrunde, einen Beutel der eingangs genannten Art zu schaffen, der auf einfache Weise ohne übermässigen Kraftaufwand und ohne mechanische Hilfsmittel die Bildung einer wieder verschliessbaren Ausgiessöffnung ermöglicht.The invention has for its object to provide a bag of the type mentioned above, which allows in a simple manner without excessive force and without mechanical aids the formation of a reclosable pouring spout.

Zur erfindungsgemässen Lösung der Aufgabe führt ein Seitenfaltenbeutel mit den Merkmalen des Anspruchs 1.For the inventive solution of the problem performs a gusseted bag with the features of claim 1.

Die Öffnungslasche ist in die Längssiegelnaht eingesiegelt und das Beutelmaterial ist auf der Innenseite des Beutels mit einer Siegelschicht beschichtet. Die Siegelschicht kann irgendeine geeignete siegelfähige Beschichtung sein und besteht vorzugsweise aus einem Kunststoff auf Polyolefinbasis, beispielsweise Polyethylen oder Polypropylen.The opening tab is sealed in the longitudinal sealing seam and the bag material is coated on the inside of the bag with a sealing layer. The sealant layer may be any suitable sealable coating, and is preferably made of a polyolefin-based plastic such as polyethylene or polypropylene.

Als Beutelmaterial kann ein beliebiges geeignetes Material aus Kunststoff verwendet werden, insbesondere auch als Laminat in Verbindung mit weiteren Kunststofffilmen, beispielsweise aus Polyester, Polyamid oder orientiertem Polypropylen, Metallfolien, z.B. Aluminiumfolien, oder Papier. Ein geeignetes Beutelmaterial umfasst einen gegebenenfalls bedruckten Kunststofffilm aus Polyester, Polyamid oder orientiertem Polypropylen, insbesondere als Laminat in Verbindung mit weiteren Kunststofffilmen, Metallfolien, wie Aluminiumfolien, oder Papier, mit einer Siegelschicht aus einem Kunststoff auf Polyolefinbasis, beispielsweise Polyethylen oder PolypropylenAny suitable plastic material may be used as the bag material, especially as a laminate in conjunction with other plastic films, for example of polyester, polyamide or oriented polypropylene, metal foils, e.g. Aluminum foils, or paper. A suitable bag material comprises an optionally printed plastic film of polyester, polyamide or oriented polypropylene, in particular as a laminate in conjunction with other plastic films, metal foils, such as aluminum foils, or paper, with a sealing layer of a polyolefin-based plastic, for example polyethylene or polypropylene

Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung bevorzugter Ausführungsbeispiele sowie anhand der Zeichnung; diese zeigt schematisch in

- Fig. 1
eine Schrägsicht auf einen geschlossenen Seitenfaltenbeutel mit seitlich angeordneter Längssiegelnaht mit eingesiegelter Öffnungslasche;
- Fig. 2
einen Längsschnitt durch die obere Quersiegelnaht des Beutels von Fig. 1 nach deren Linie I-I;
- Fig. 3
einen Längsschnitt durch die eingesiegelte Öffnungslasche von Fig. 1 entlang deren Linie II-II;
- Fig. 4
eine Schrägsicht auf ein Detail des Beutels von Fig. 1 in geöffnetem Zustand.
Further advantages, features and details of the invention will become apparent from the following description of preferred embodiments and from the drawing; this shows schematically in
- Fig. 1
an oblique view of a closed side gusseted bag with laterally arranged longitudinal sealing seam with sealed opening tab;
- Fig. 2
a longitudinal section through the upper transverse seam of the bag of Fig. 1 according to their line II;
- Fig. 3
a longitudinal section through the sealed opening tab of Fig. 1 along their line II-II;
- Fig. 4
an oblique view of a detail of the bag of Fig. 1 in open condition.

Ein in Fig. 1 dargestellter Seitenfaltenbeutel 10 weist einen Blockboden 12 rechteckigen Querschnitts auf und ist somit als Standbeutel ausgestaltet. Von den beiden Längsseiten des Blockbodens 12 ragen zwei Beutelwände als Beutelvorderwand 14 und Beutelrückwand 24 auf. Beutelvorderwand 14 und Beutelrückwand 24 sind über zwei vom Blockboden 12 aufragende Seitenwände 16, 26 miteinander verbunden.An in Fig. 1 illustrated gusseted bag 10 has a block bottom 12 of rectangular cross-section and is thus configured as a stand-up pouch. From the two longitudinal sides of the block bottom 12 protrude two bag walls as a bag front wall 14 and bag rear wall 24. Bag front wall 14 and bag rear wall 24 are connected via two upstanding from the block bottom 12 side walls 16, 26 with each other.

Der Seitenfaltenbeutel 10 besteht aus einem flexiblen folienförmigen Material, welches über eine Längssiegelnaht 34 zu einem aus der Beutelvorderwand 14, der Beutelrückwand 24 und den Seitenwänden 16, 26 gebildeten Schlauch geformt ist. Die Längssiegelnaht 34 verläuft in einer der Beutelseitenwände 16, 26, im dargestellten Beispiel in der Seitenwand 16. Vor dem Anbringen von Quersiegelnähten 36, 38 werden die Beutelseitenwände 16, 26 zu Seitenfalten mit mittiger, nach innen gerichteter Faltkante 18, 28 geformt. Die Faltkanten 18, 28 teilen jede der Beutelseitenwände 16, 26 in zwei Seitenfaltenhälften 20, 22 bzw. 30, 32. Die Längssiegelnaht 34 ragt in der Beutelseitenwand 16 von der Faltkante 18 zwischen den Seitenfaltenhälften 20, 22 nach aussen ab.The gusseted bag 10 consists of a flexible film-shaped material, which is formed via a longitudinal sealing seam 34 to a hose formed from the bag front wall 14, the bag rear wall 24 and the side walls 16, 26. The longitudinal seam 34 extends in one of the bag sidewalls 16,26, in the illustrated example in the sidewall 16. Prior to attaching transverse seal seams 36,38, the bag sidewalls 16,26 are formed into gussets having a central, inwardly directed crease edge 18,28. The folded edges 18, 28 divide each of the bag side walls 16, 26 into two side fold halves 20, 22 and 30, 32, respectively. The longitudinal seal seam 34 projects outwardly in the bag side wall 16 from the fold edge 18 between the side fold halves 20, 22.

Auf einer schnell laufenden vertikalen FFS-Maschine wird zunächst aus einem flexiblen folienförmigen Bandmaterial der vorstehend beschriebene Schlauch mit der Längssiegelnaht 34 gebildet. Die Bildung der unteren Quersiegelnaht 36 erfolgt zusammen mit der Ausbildung der nach innen gerichteten Faltkanten 18, 28 und dem Formen des flachen Blockbodens 12 über entsprechend angeordnete Faltenleger, Falzer und/oder Führungen. Damit der Blockboden 12 eine im wesentlichen ebene Standfläche aufweist, wird hierbei die untere Quersiegelnaht 36 gegen die Aussenfläche des Bodens 12 gesiegelt. Anschliessend wird einer der folgenden Wege beschritten:

  1. a. Der Beutel 10 wird mit dem gewünschten Produkt gefüllt und beim nächsten Maschinenzyklus wird, gleichzeitig mit der Erzeugung der unteren Quersiegelnaht 36 für den Blockboden 12 des nachfolgenden Beutels 10, die obere Quersiegelnaht 38 angebracht.
  2. b. Das Bandmaterial wird auf der erforderlichen Höhe geschnitten, und der Beutel 10 mit dem voll ausgebildeten Blockboden 12 wird zum Einfüllen des Produktes und zum Verschliessen des Beutels mit der oberen Quersiegelnaht 38 zu einer zweiten Station transferiert.
On a fast-running vertical FFS machine is first off a flexible sheet-like strip material of the hose described above formed with the longitudinal sealing seam 34. The formation of the lower transverse sealing seam 36 takes place together with the formation of the inwardly directed folding edges 18, 28 and the shaping of the flat block bottom 12 via correspondingly arranged folds, folders and / or guides. So that the block bottom 12 has a substantially flat base, in this case the lower transverse sealing seam 36 is sealed against the outer surface of the bottom 12. Then one of the following ways will be followed:
  1. a. The bag 10 is filled with the desired product and at the next machine cycle, simultaneously with the creation of the lower transverse seam 36 for the block bottom 12 of the subsequent bag 10, the upper transverse seam 38 is attached.
  2. b. The strip material is cut to the required height and the bag 10 with the fully formed block bottom 12 is transferred to a second station for filling the product and closing the bag with the upper transverse seam 38.

Wie in Fig. 2 dargestellt, sind in der oberen Quersiegelnaht 38 in einem mittleren Abschnitt A die einander anliegenden Innenseiten der Beutelvorderwand 14 und der Beutelrückwand 24 gegeneinander gesiegelt. In einem ersten randständigen Abschnitt B sind die einander anliegenden Innenflächen der Beutelvorderwand 14 und der einen Seitenfaltenhälfte 20 der Beutelseitenwand 16 sowie der Beutelrückwand 24 und der anderen Seitenfaltenhälfte 22 gegeneinander gesiegelt. In einem zweiten Randbereich C sind die einander anliegenden Innenflächen der Beutelvorderwand 14 und der einen Seitenfaltenhälfte 30 der Beutelseitenwand 26 sowie der Beutelrückwand 24 und der anderen Seitenfaltenhälfte 32 der Beutelseitenwand 26 gegeneinander gesiegelt. Auch die im Bereich des Blockbodens 12 angeordnete untere Quersiegelnaht 36 weist die vorstehend beschriebenen Abschnitte A, B und C auf, und die einander anliegenden und gegeneinander gesiegelten Beutelteile sind identisch mit denjenigen in der oberen Quersiegelnaht 38.As in Fig. 2 shown, in the upper transverse sealing seam 38 in a central portion A, the adjacent inner sides of the bag front wall 14 and the bag rear wall 24 are sealed against each other. In a first marginal section B, the adjacent inner surfaces of the bag front wall 14 and the one side fold half 20 of the bag side wall 16 and the bag rear wall 24 and the other side fold half 22 are sealed against each other. In a second edge region C, the adjacent inner surfaces of the bag front wall 14 and the one side fold half 30 of the bag side wall 26 and the bag rear wall 24 and the other side fold half 32 of the bag side wall 26 are sealed against each other. Also arranged in the region of the block bottom 12 lower transverse seam 36 has the above-described sections A, B and C, and the adjacent and sealed against each other bag parts are identical to those in the upper transverse sealing seam 38th

In der unteren Quersiegelnaht 36 am Blockboden 12 weisen alle Siegelungen der Beutelinnenseiten in den Abschnitten A, B und C und der Beutelaussenseiten in den Abschnitten B und C eine sehr hohe Peelfestigkeit auf. Die Siegelungen sind über die gesamte Länge der unteren Quersiegelnaht 36 praktisch untrennbar miteinander verschweisst.In the lower transverse sealing seam 36 on the block bottom 12, all seals of the inner sides of the bag in sections A, B and C and the outer sides of the bag in sections B and C have a very high peel strength. The seals are virtually inseparable welded together over the entire length of the lower transverse sealing seam 36.

In der dem Blockboden 12 entfernt liegenden oberen Quersiegelnaht 38 im Öffnungsbereich des Beutels weisen die Siegelungen der Beutelinnenseiten in den Abschnitten A, B und C unterschiedlich hohe Peelfestigkeiten auf. Die Siegelungen in den Abschnitten A und C weisen, wie die Siegelungen in der unteren Quersiegelnaht 36, eine sehr hohe Peelfestigkeit auf. Die Siegelungen sind über die Länge der Abschnitte A und C praktisch untrennbar miteinander verschweisst. Im Abschnitt B weisen die Siegelungen der Beutelinnenseiten, d.h. die Siegelungen zwischen der Innenseite der Beutelvorderwand 14 und der Innenseite der Seitenfaltenhälfte 20 sowie zwischen der Beutelrückwand 24 und der Innenseite der Seitenfaltenhälfte 22, gute Peeleigenschaften auf. Die Siegelung der Beutelaussenseiten im Abschnitt C, d.h. die Siegelung zwischen der Aussenseite der Seitenfaltenhälfte 30 der Beutelvorderwand 14 und der Aussenseite der Seitenfaltenhälfte 32 der Beutelrückwand 24 weist, wie die Siegelungen in der unteren Quersiegelnaht 36, eine sehr hohe Peelfestigkeit auf. Die Siegelung der Beutelaussenseiten im Abschnitt B, d.h. die Siegelung zwischen der Aussenseite der Seitenfaltenhälfte 20 der Beutelvorderwand 14 und der Aussenseite der Seitenfaltenhälfte 22 der Beutelrückwand 24, weist gute Peeleigenschaften auf, oder die Beutelaussenseiten im Abschnitt B sind gar nicht gesiegelt.In the upper transverse sealing seam 38, which is remote from the block bottom 12, in the opening region of the bag, the seals of the inner sides of the bag in the sections A, B and C have different degrees of peel strength. The seals in sections A and C have, like the seals in the lower transverse seam 36, a very high peel strength. The seals are virtually inseparable welded together over the length of sections A and C. In section B, the seals on the inside of the bag, i. the seals between the inside of the bag front wall 14 and the inside of the gusset half 20 and between the bag back wall 24 and the inside of the gusset half 22, good peel properties. The seal of the bag outer sides in section C, i. the seal between the outside of the side fold half 30 of the bag front wall 14 and the outside of the side fold half 32 of the bag rear wall 24 has, like the seals in the lower transverse seal 36, a very high peel strength. The seal of the bag outer sides in section B, i. the seal between the outside of the gusset half 20 of the bag front wall 14 and the outside of the gusset half 22 of the bag back wall 24 has good peel properties, or the bag outer sides in the section B are not sealed at all.

Die im Abschnitt B gegeneinander gesiegelten Beutelwandteile lassen sich durch Ziehen an der Längssiegelnaht 34 unterhalb der oberen Quersiegelnaht 38 ohne grossen Kraftaufwand von einander peelen. Bei diesem Vorgang wird die Faltkante 18 der Seitenfalte der Beutelseitenwand 16 bis zur vollständigen Trennung der Seitenfaltenhälften 20, 22 von der Beutelvorderwand 14 bzw. der Beutelrückwand 24 nach aussen gezogen. Wie in Fig. 4 dargestellt, führt die Trennung der innenseitigen Siegelungen im Abschnitt B in der oberen Quersiegelnaht 38 zu einer Ausgiessöffnung 42 für ein flüssiges oder rieselfähiges Füllgut. Durch Zurückschieben des Ausgusses kann die Ausgiessöffnung bei Verwendung eines genügend steifen Beutelmaterials teilweise wieder verschlossen werden. Alternativ kann ein mit einem Haftkleber beschichteter Verschlussstreifen, eine Klammer oder eine gleich wirkende Vorrichtung zur Herstellung eines sichereren Wiederverschlusses verwendet werden.The sealed against each other in section B bag wall parts can be exfoliated by pulling on the longitudinal sealing seam 34 below the upper transverse seam 38 without great effort of each other. In this process, the folding edge 18 of the gusset side of the bag side wall 16 is pulled to the complete separation of the gusset halves 20, 22 from the bag front wall 14 and the bag rear wall 24 to the outside. As in Fig. 4 represented, leads the Separation of the inside seals in section B in the upper transverse seam 38 to a pouring opening 42 for a liquid or free-flowing medium. By pushing back the spout, the spout can be partially closed again when using a sufficiently rigid bag material. Alternatively, a pressure sensitive adhesive coated closure strip, clip, or equivalent device may be used to produce a more secure reclosure.

Um das Ziehen an der Längssiegelnaht 34 und damit das Öffnen des Beutels zu erleichtern, ist unmittelbar unterhalb der oberen Quersiegelnaht 38 eine Öffnungslasche 40 in die Längssiegelnaht 34 eingesiegelt. Die Öffnungslasche 40 besteht im vorliegenden Beispiel aus einer in Fig. 3 gezeigten Schlaufe aus einem flexiblen folienförmigen Material. An Stelle einer Schlaufe kann auch ein einfacher Materialstreifen oder beispielsweise ein Spritzgussteil eingesetzt werden. Die einzige Bedingung des für die Öffnungslasche 40 vorgesehenen Materials ist hinsichtlich der Siegeleigenschaften dessen Kompatibilität mit der Siegelschicht auf der Innenseite des Beutelmaterials. Besteht beispielsweise das Beutelmaterial aus einem Polyester mit einer innenseitigen Siegelschicht aus Polyethylen (PE), so kann die Öffnungslasche 40 z.B. eine dicke Folie mit der Schichtfolge PE/Polyester/PE oder ein Spritzgussteil auf PE-Basis sein.In order to facilitate the pulling on the longitudinal sealing seam 34 and thus the opening of the bag, an opening tab 40 is sealed into the longitudinal sealing seam 34 directly below the upper transverse sealing seam 38. The opening tab 40 consists in the present example of an in Fig. 3 shown loop of a flexible film-shaped material. Instead of a loop, a simple strip of material or, for example, an injection-molded part can also be used. The only condition of the material provided for the opening tab 40 is its compatibility with the sealing layer on the inside of the bag material with regard to the sealing properties. If, for example, the bag material consists of a polyester with an inside sealing layer of polyethylene (PE), then the opening tab 40 can be, for example, a thick film with the layer sequence PE / polyester / PE or an injection-molded part based on PE.

Die unterschiedliche Peelfestigkeit im Abschnitt B gegenüber den Abschnitten A und C in der oberen Quersiegelnaht 38 kann durch Verwendung entsprechender Materialien, die unterschiedliche Peelfestigkeiten bei unterschiedlichen Siegeltemperaturen erzeugen, erreicht werden. Die Siegelbacken werden hierzu so ausgestaltet, dass sie an unterschiedlichen Stellen auf unterschiedlich hohe Temperaturen geheizt werden können. Zur Bildung einer peelbaren Verbindung zwischen zwei Beutelteilen erfolgt die Siegelung bei einer ersten Temperatur, zur Bildung einer untrennbaren Verbindung, d.h. einer Verbindung mit sehr hoher Peelfestigkeit, bei einer gegenüber der ersten Temperatur höheren zweiten Temperatur.The different peel strength in section B over the sections A and C in the top transverse seam 38 can be achieved by using appropriate materials that produce different peel strengths at different sealing temperatures. The sealing jaws are designed for this purpose so that they can be heated at different locations to different temperatures. To form a peelable connection between two parts of the bag, the sealing takes place at a first temperature, to form an inseparable compound, ie a compound with a very high peel strength, at a higher second temperature than the first temperature.

Eine andere Möglichkeit besteht in der Anwendung von Lacken oder anderen Beschichtungen, welche zu einer stärkeren oder schwächeren Siegelung führen. Derartige Lacke werden als Registerdruck an vorbestimmten Stellen in Registrierung mit einer Bedruckung des Beutels aufgebracht. Die Registrierung mit der Bedruckung des Beutels auf einer Verpackungsmaschine ermöglicht ein genaues Positionieren der am fertigen Beutel mit einem Lack zu versehenden Bereiche.Another possibility is the use of paints or other coatings, which lead to a stronger or weaker seal. Such paints are applied as register printing at predetermined locations in registration with a printing of the bag. The registration with the printing of the bag on a packaging machine allows an accurate positioning of the areas to be provided on the finished bag with a lacquer.

Die beiden vorstehend erwähnten Verfahren zur Erzeugung von Siegelungen mit unterschiedlich hoher Peelfestigkeit können auch kombiniert angewendet werden.The two methods mentioned above for producing seals with different levels of peel strength can also be used in combination.

Claims (5)

  1. Side gusset bag having a bottom (12) and bag walls extending upwards from the latter and comprising a front wall (14), a rear wall (24) and two side walls (16, 26), made of a flexible film-like bag material, the bag walls forming a tube, the tube having a longitudinal sealing seam which seals face to face of the bag material and being closed in the region of the bottom (12) by a lower transverse sealing seam (36) which seals face to face of the bag material and at the other end by an upper transverse sealing seam (38) which seals face to face of the bag material, the side walls (16, 26) of the bag being shaped at least in the region of the transverse sealing seams (36, 38) into side gussets with an inwardly directed folding edge (18, 28) which divides the side walls (16, 26) of the bag into two side gusset halves (20, 22; 30, 32) each,
    the longitudinal sealing seam (34) being arranged in a side wall (16) of the bag and an opening tab (40) being sealed into the longitudinal sealing seam (34) in the region of the upper transverse sealing seam (38), in which, in the upper transverse sealing seam (38), the side gusset halves (20, 22) which are sealed against the inner side of the front wall (14) and rear wall (24) of the bag can be peeled off the front wall (14) and rear wall (24) of the bag by pulling on the opening tab (40), forming a pour opening (42).
  2. Side gusset bag according to claim 1, characterised in that the bag material is coated with a sealing layer on the inner side of the bag.
  3. Side gusset bag according to either of claims 1 to 2, characterised in that the sealing layer is made of a polyolefin-based plastic, for example polyethylene or polypropylene.
  4. Side gusset bag according to any of claims 1 to 3, characterised in that the bag material comprises a plastic film made of polyester, polyamide or oriented polypropylene, in particular as a laminate in combination with further plastic films, metal foils such as aluminium foils, or paper.
  5. Side gusset bag according to any of claims 1 to 4, characterised in that the bag material consists of a plastic film, printed if occasion arises, made of polyester, polyamide or oriented polypropylene, in particular as a laminate in combination with further plastic films, metal foils such as aluminium foils, or paper, with a sealing layer made of a polyolefin-based plastic, for example polyethylene or polypropylene.
EP05405307A 2005-04-21 2005-04-21 Side-folded bag Active EP1714904B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE502005005188T DE502005005188D1 (en) 2005-04-21 2005-04-21 Satchel bags
ES05405307T ES2309699T3 (en) 2005-04-21 2005-04-21 SIDE FOLDING BAG.
EP05405307A EP1714904B1 (en) 2005-04-21 2005-04-21 Side-folded bag
PL05405307T PL1714904T3 (en) 2005-04-21 2005-04-21 Side-folded bag

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05405307A EP1714904B1 (en) 2005-04-21 2005-04-21 Side-folded bag

Publications (2)

Publication Number Publication Date
EP1714904A1 EP1714904A1 (en) 2006-10-25
EP1714904B1 true EP1714904B1 (en) 2008-08-27

Family

ID=34942970

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05405307A Active EP1714904B1 (en) 2005-04-21 2005-04-21 Side-folded bag

Country Status (4)

Country Link
EP (1) EP1714904B1 (en)
DE (1) DE502005005188D1 (en)
ES (1) ES2309699T3 (en)
PL (1) PL1714904T3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202012006581U1 (en) 2012-07-07 2013-09-17 Bischof + Klein Gmbh & Co. Kg Bags of flexible material, in particular of paper or paper composite material

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5437406A (en) * 1993-07-02 1995-08-01 International Paper Semi-rigid cereal carton
US5392589A (en) * 1993-09-03 1995-02-28 Jebco Packaging Systems, Inc. Method of constructing a container with unitary spout pull tab
DE19612102C2 (en) * 1996-03-27 1998-04-02 Maria Bloemer Packaging with a top and / or bottom surface that can be created by folding
US5871146A (en) * 1997-04-29 1999-02-16 Onderko; Patricia Fluid carton container with pull tab
DE29715847U1 (en) * 1997-09-04 1999-01-07 Bischof Und Klein Gmbh & Co, 49525 Lengerich Gusseted bags or sacks

Also Published As

Publication number Publication date
DE502005005188D1 (en) 2008-10-09
PL1714904T3 (en) 2009-02-27
EP1714904A1 (en) 2006-10-25
ES2309699T3 (en) 2008-12-16

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