EP1714904B1 - Sac à parois latérales pliées - Google Patents

Sac à parois latérales pliées 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)
English (en)
Other versions
EP1714904A1 (fr
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 EP05405307A priority Critical patent/EP1714904B1/fr
Priority to PL05405307T priority patent/PL1714904T3/pl
Priority to DE502005005188T priority patent/DE502005005188D1/de
Priority to ES05405307T priority patent/ES2309699T3/es
Publication of EP1714904A1 publication Critical patent/EP1714904A1/fr
Application granted granted Critical
Publication of EP1714904B1 publication Critical patent/EP1714904B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
    • B65D75/5861—Spouts
    • B65D75/5866—Integral spouts
    • 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
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/008—Standing 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.

Landscapes

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

Claims (5)

  1. Sac à soufflets avec un fond (12) et des parois de sac s'élevant à partir de celui-ci et comportant une paroi avant (14), une paroi arrière (24) et deux parois latérales (16, 26) constituées d'une matière pour sac flexible en forme de feuille, dans lequel les parois de sac forment un tube, le tube comporte un joint longitudinal scellé scellant une face intérieure contre une face intérieur de la matière pour sac, il est obturé dans la zone du fond (12) par un joint transversal inférieur scellé (36) scellant une face intérieure contre une face intérieur de la matière pour sac et, à l'autre extrémité, par un joint transversal supérieur scellé (38) scellant une face intérieure contre une face intérieur de la matière pour sac, dans lequel les parois latérales du sac (16, 26), au moins dans la zone des joints transversaux scellés (36, 38), sont façonnées pour former des soufflets avec une arête de soufflet (18, 28) dirigée vers l'intérieur, divisant chacune des parois latérales du sac (16, 26) en deux moitiés de soufflet (20, 22 ; 30, 32), dans lequel le joint longitudinal scellé (34) est placé dans une paroi latérale du sac (16) et, dans la zone du joint transversal supérieur scellé (38), une languette d'ouverture (40) est scellée dans le joint longitudinal scellé (34), et dans lequel, dans le joint transversal supérieur scellé (38), les moitiés de soufflet (20, 22) scellées contre la face intérieure de la paroi avant du sac (14) et de la paroi arrière du sac (24) peuvent être décollées de la paroi avant du sac (14) et de la paroi arrière du sac (24) par une traction sur la languette d'ouverture (40) en formant une ouverture de versement (42).
  2. Sac à soufflets selon la revendication 1, caractérisé en ce que la matière pour sac est revêtue d'une couche de scellement sur la face intérieure du sac.
  3. Sac à soufflets selon l'une quelconque des revendications 1 à 2, caractérisé en ce que la couche de scellement est constituée d'une matière plastique à base de polyoléfine, par exemple du polyéthylène ou du polypropylène.
  4. Sac à soufflets selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la matière pour sac comporte un film de matière plastique en polyester, polyamide ou polypropylène orienté, en particulier sous forme de laminé en combinaison avec d'autres films de matière plastique, de feuilles de métal, comme par exemple des feuilles d'aluminium ou de papier.
  5. Sac à soufflets selon l'une quelconque des revendications 1 à 4, caractérisé en ce que la matière pour sac est constituée d'un film de matière plastique éventuellement imprimé en polyester, polyamide ou polypropylène orienté, en particulier sous forme de laminé en combinaison avec d'autres films de matière plastique de feuilles de métal, comme par exemple des feuilles d'aluminium ou de papier, avec une couche de scellement constituée d'une matière plastique à base de polyoléfine, par exemple du polyéthylène ou du polypropylène.
EP05405307A 2005-04-21 2005-04-21 Sac à parois latérales pliées Active EP1714904B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP05405307A EP1714904B1 (fr) 2005-04-21 2005-04-21 Sac à parois latérales pliées
PL05405307T PL1714904T3 (pl) 2005-04-21 2005-04-21 Składany pojemnik
DE502005005188T DE502005005188D1 (de) 2005-04-21 2005-04-21 Seitenfaltenbeutel
ES05405307T ES2309699T3 (es) 2005-04-21 2005-04-21 Bolsa de pliegues laterales.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05405307A EP1714904B1 (fr) 2005-04-21 2005-04-21 Sac à parois latérales pliées

Publications (2)

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

Family

ID=34942970

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05405307A Active EP1714904B1 (fr) 2005-04-21 2005-04-21 Sac à parois latérales pliées

Country Status (4)

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

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202012006581U1 (de) 2012-07-07 2013-09-17 Bischof + Klein Gmbh & Co. Kg Beutel aus flexiblem Material, insbesondere aus Papier oder Papierverbundmaterial

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 (de) * 1996-03-27 1998-04-02 Maria Bloemer Verpackung mit einer durch Faltung erzeugbaren Kopf- und/oder Bodenfläche
US5871146A (en) * 1997-04-29 1999-02-16 Onderko; Patricia Fluid carton container with pull tab
DE29715847U1 (de) * 1997-09-04 1999-01-07 Bischof Und Klein Gmbh & Co, 49525 Lengerich Seitenfaltenbeutel oder -sack

Also Published As

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

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