EP3858755B1 - Seitenfaltenbeutel - Google Patents

Seitenfaltenbeutel Download PDF

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Publication number
EP3858755B1
EP3858755B1 EP20155221.3A EP20155221A EP3858755B1 EP 3858755 B1 EP3858755 B1 EP 3858755B1 EP 20155221 A EP20155221 A EP 20155221A EP 3858755 B1 EP3858755 B1 EP 3858755B1
Authority
EP
European Patent Office
Prior art keywords
side gusset
seam
bag according
gusset bag
ventilation
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
EP20155221.3A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3858755A1 (de
Inventor
Jochen Brauer
Patrick PUNDSACK
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mondi AG
Original Assignee
Mondi AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mondi AG filed Critical Mondi AG
Priority to ES20155221T priority Critical patent/ES2964200T3/es
Priority to HUE20155221A priority patent/HUE064351T2/hu
Priority to EP20155221.3A priority patent/EP3858755B1/de
Priority to PL20155221.3T priority patent/PL3858755T3/pl
Publication of EP3858755A1 publication Critical patent/EP3858755A1/de
Application granted granted Critical
Publication of EP3858755B1 publication Critical patent/EP3858755B1/de
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
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/01—Ventilation or drainage of bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/10—Bags or like containers made of paper and having structural provision for thickness of contents with gusseted sides

Definitions

  • the invention relates to a gusseted bag with a first front wall and a second front wall which lie opposite one another and which are connected to one another at the longitudinal edges by a first gusset and a second gusset, with a filling space formed between the front walls and the gussets extending in the direction of at least one corner of the bag a separation seam is delimited, which connects the first side gusset to the first front wall and delimits the filling space from a ventilation space provided with a ventilation opening, and at least one air passage is provided between the filling space and the ventilation space.
  • the gusseted bag is usually designed as disposable packaging, so that low manufacturing costs and efficient use of material are also sought. Precisely in order to achieve low production costs, the gusseted bag should be designed as simply as possible and easy to manufacture, with additional components such as fitted valves or the like, which are basically also known from the prior art, being dispensed with as far as possible. Additional components would possibly also result in foreign substances, which can be disadvantageous in recycling.
  • a typical area of application for gusseted bags is the packaging of food and animal feed, where the protection of the packaged goods from contamination, parasites or the like must be ensured.
  • Dog food comes into consideration as pet food, which is sold in large quantities and often also in large container sizes of, for example, 15 kg as dry food.
  • the gusseted bag is basically also suitable for other applications in which ventilation is appropriate in the manner described.
  • Other filling goods can be, for example, cat litter, pourable building materials and pourable cleaning agents such as detergents.
  • a ventilation space is delimited from a filling space by the corner welding as a separating seam, the filling space and the ventilation space being connected by at least one air passage.
  • the air passage can, for example, be arranged adjacent to the longitudinal seam, be formed by an interruption in the separating seam, or be designed as a type of labyrinth. Even when designed in the manner of a labyrinth ( 4 ) the two sections within the scope of the invention are collectively referred to as a parting seam.
  • the corner welds according to the DE 10 2007 062 814 A1 are not only intended for ventilation, but also enable the initially inserted side gussets to be unfolded in a controlled manner when the side gusset bag is being filled, in order to be able to form the side gusset bag approximately in the shape of a cuboid.
  • the ventilation space provided with a ventilation opening in the associated front wall is roughened on the inside. This ensures that the foil surfaces do not lie tightly on top of each other.
  • roughening as a separate process step is expensive.
  • the paths intended for ventilation are at least partially closed by buckling when the side-gusset bag is in the unfolded state.
  • More generic gusseted bags are from DE 1 868 662 U (Fig.5), EP 2 043 750 B1 , EP 1 820 745 A1 , EP 2 845 820 B1 and GB1,162,013 known.
  • the separating seam can optionally be segmented, ie it can be formed from a number of individual connection points.
  • the invention is based on the object of reliably enabling good venting performance with a simple construction.
  • the invention Based on a generic gusseted bag, the invention provides that on the longitudinal edge of the dividing seam connecting the first front wall with the first gusset—starting from the filling space—an additional seam leading into the filling space is located in front.
  • the additional seam serves to initiate buckling or to buckle.
  • the configuration described at the transition from the filling space to the ventilation space is initially described within the scope of the invention in relation to the first front wall and the first side fold.
  • corresponding ventilation spaces can be provided on both sides of each front wall and/or on both front walls.
  • the ventilation spaces can be arranged in a bottom area and/or a top area of the gusseted bag.
  • the gusseted bag is made of film, whereby a web of material can be folded into a tubular shape without restriction to form the two front walls and the gussets or individual material sections for the front walls and the gussets can be connected to one another.
  • a web of material can be folded into a tubular shape without restriction to form the two front walls and the gussets or individual material sections for the front walls and the gussets can be connected to one another.
  • Corresponding methods for bag production are known to the person skilled in the art.
  • a plastic fabric composite is particularly suitable for forming the gusseted bag, such as that from the one already mentioned at the outset EP 2 845 820 B1 is known.
  • the gusseted bag is provided with longitudinal seams on its longitudinal edges, which there connect the gussets to the front walls and/or are provided for stabilization.
  • the width of corresponding longitudinal edges is typically in a range from 4 mm to 16 mm, in particular 6 mm to 12 mm and for example 8 mm.
  • the front walls and the side gussets can be heat-sealed on the inside of the bag facing the filling space, the dividing seams, the optionally provided longitudinal seams described above and also other connecting seams can easily be formed by heat-sealing, which is common for side-gusseted bags made of plastic film and is preferred.
  • films can be extruded and/or laminated in multiple layers.
  • Conventional bag films have, for example, a heat-sealable layer made of polyolefin, in particular polyethylene, in which case an outer layer of the film is then frequently made of polyethylene terephthalate (PET) or oriented, in particular biaxially oriented, polypropylene (BOPP).
  • PET polyethylene terephthalate
  • BOPP biaxially oriented, polypropylene
  • gusseted bag for example, formed entirely on the basis of polyethylene or entirely on the basis of polypropylene
  • the dividing seam leaves an air passage between the filling space and the ventilation space.
  • An interruption that is arranged in the middle or approximately in the middle with respect to the separating seam is particularly preferred.
  • the dividing seam preferably extends from the associated longitudinal edge to a transverse seam which connects the first side gusset to the first front wall.
  • a transverse seam can extend over the entire width of the gusseted bag. This is provided in particular when the transverse seam also forms the upper edge of the gusseted bag. Alternatively, it can be provided that the transverse seam is limited to the area of the associated gusset.
  • the dividing seam connects the associated longitudinal edge, which is preferably provided with a longitudinal seam, to the transverse seam with at least one interruption, the dividing seam usually running at an angle of between 30° and 60°.
  • the separating seam can also consist of pieces that are slightly offset from one another and can have curves and/or angulations. For example, it is possible for the dividing seam to have a change in direction towards the ventilation opening at a central or approximately central interruption in order to direct air to the ventilation opening in a targeted manner for the purpose of ventilation in the event of excess pressure.
  • the venting space is approximately triangular in shape.
  • the ventilation opening can be formed in the transverse seam if this otherwise closes the gusseted bag at an upper edge or a lower edge or the air to be discharged is guided to the outside via further subsequent flow paths.
  • the ventilation opening is formed in the first front wall or the side fold.
  • a ventilation opening can also be provided on the first front wall and the first side fold. If the ventilation opening is arranged on the gusset, there is overall somewhat better protection against dirt, because the gusset is folded in between the front walls and is also fixed there by the dividing seam.
  • the vent opening can be designed as a simple incision. Such an incision can be formed particularly easily in the manufacturing process. If there is no overpressure, the two edges of the incision are usually at the same height and at least seal the bag against dirt, foreign matter, insects and other vermin. A type of valve function can thus be realized in a simple manner by means of an incision.
  • the incision is preferably straight and has a length of typically 2 to 15 mm, in particular 4 to 10 mm. As explained in more detail below, the incision can run obliquely relative to the longitudinal edge, in particular at an angle of between 30° and 60°.
  • the ventilation opening designed as an incision can be arranged at a comparatively small distance of 0.8 mm to 10 mm, preferably 1 mm to 8 mm, particularly preferably 2 mm to 5 mm, from a support seam.
  • the support seam then preferably runs parallel or approximately parallel to the incision, which is usually straight and designed as a ventilation opening.
  • the support seam is arranged behind the incision as a ventilation opening, viewed in the direction of flow.
  • the first side gusset and the first front wall are pushed away from one another.
  • the connection at the support seam then causes the materials to be able to stand out from one another in an arc at the incision, as a result of which a good ventilation performance can then be achieved.
  • the additional seam is intended to cause the filled gusseted bag to snap or buckle in front of the separating seam if excess pressure occurs in the filling space, for example as a result of compression from the outside.
  • the additional seam must be brought into the interior in order to achieve the desired deformation.
  • the available volume of the filling space should not be excessively impaired.
  • the additional seam extends along the transverse direction over preferably less than 20% and in particular less than 10% of the width of the front walls.
  • the front walls could have a width of between 150 mm and 500 mm, in particular between 250 mm and 425 mm, for example approximately 375 mm. Since the filled gusseted bag has approximately the shape of a cuboid, the stripe width of the gussets between the two front walls is referred to as the depth within the scope of the invention.
  • the depth of the side folds is preferably between 80 mm and 200 mm, particularly preferably between 115 mm and 160 mm, for example around 135 mm. If connecting seams are provided on the longitudinal edges, the dimensions with regard to the inner filling space are reduced according to the width of these connecting seams.
  • the additional seam can, starting from the associated longitudinal edge or starting from a longitudinal seam provided on the longitudinal edge, that is, starting in front of the inner edge adjacent to the filling space Longitudinal seam by 5 mm to 30 mm, in particular by 8 mm to 18 mm, for example 12 mm along the transverse direction into the filling space.
  • the shape of the additional seam can be varied.
  • An oblique course for example a triangular shape with an optionally also rounded tip pointing in the direction of the filling space, has also proven to be particularly expedient with regard to stability in the event of excess pressure.
  • the additional seam causes additional buckling when viewed from the filling space, so that the additional seam can also be referred to as a buckling seam.
  • the person skilled in the art can easily define a suitable distance from the separating seam. For example, a distance between the start of the separating seam and the point at which the additional seam extends furthest into the filling space in the transverse direction can be determined along the associated longitudinal edge. This distance determined along the longitudinal seam, ie the longitudinal direction of the gusseted bag, is typically between 3 mm and 30 mm, in particular between 5 mm and 25 mm, for example between 8 mm and 20 mm.
  • the ventilation space can be arranged in the top area or in the area of a bottom of the gusseted bag, it being possible for a ventilation space to be formed at every transition between the side gusset and the front wall.
  • At least one ventilation space is arranged in the top area of the gusseted bag.
  • the gussets are shortened in the head area compared to the front walls, for example to arrange a reclosure in the manner of a zipper or slider above the gussets.
  • Zippers or sliders are reclosures that have interlocking profile strips.
  • Velcro-type closures with individual, for example, mushroom-shaped elements can also be provided. While a zipper is pressed together by hand by a user, a slider includes a sliding element for separating and merging the profile strips.
  • the gusseted bag can also have a stand-up base which is formed from a separate material section. The separate section of material is then connected around its perimeter to the front panels and the side gussets.
  • the 1 shows a gusseted bag with a first front wall 1a and a second front wall 1b, which are opposite one another and are connected to one another at longitudinal edges 2a, 2b, 2c, 2d by a first gusset 3a and a second gusset 3b.
  • a filling space 4 is formed on the inside of the gusseted bag, in which dry food 5 for dogs is accommodated. Because of the pelleted dry food 5 , air also remains in the filling space 4 . In order to prevent the stack from slipping or even bursting of individual side-gusset bags when the side-gusset bag is compressed, in particular when stacking, the side-gusset bag has a venting function.
  • the filling space 4 which is filled with dry food 5 in the exemplary embodiment, is separated from a ventilation space 8 provided with a ventilation opening 7 by a separating seam 6 formed by means of heat sealing, with an air passage 9 between the filling space 4 and the ventilation space 8 being interrupted by the separating seam 6 is formed.
  • a ventilation space 8 is also provided in the same way between the first front wall 1a and the second side gusset 3b in the exemplary embodiment shown. In principle, it is also possible to form corresponding ventilation spaces 8 on the opposite, second front wall 1b.
  • the vent hole 7 is formed in the first front wall 1a.
  • the ventilation opening 7 can also be formed in the first gusset 3a at a corresponding position, so that even improved protection against dirt is then achieved.
  • both in the first front wall 1a and in the first side gusset 3a each have a ventilation opening 7 can be provided.
  • a plurality of ventilation openings 7 for one ventilation space 8 can also be provided in the first front wall 1a or the first side gusset 3a. As described below, however, the formation of exactly one ventilation opening 7 in the first front wall 1a and/or the first side fold 3a is advantageous for the ventilation space 7 shown.
  • Longitudinal seams 10 in the form of heat-sealed seams are provided on all longitudinal edges 2a, 2b, 2c, 2d.
  • the longitudinal seams have a width of approximately 8 mm, for example.
  • the separating seam 6 extends from the longitudinal seam 10 to a transverse seam 11, which in the exemplary embodiment is limited only to the area of the associated first side gusset 3a.
  • the gusseted bag is then closed by a closure seam 13 running in the transverse direction. If, on the other hand, no reclosure 12 is provided in a simpler configuration of the gusseted bag, the transverse seam 11 can also be drawn through as the upper edge of the gusseted bag along the transverse direction.
  • an additional additional seam 14 is provided on the longitudinal edge 2a connecting the first front wall 1a with the first side gusset 3a, which, starting from the filling space 4 , is located in front of the parting seam 6 and is led into the filling space 4 . Since a longitudinal seam 10 is provided on the corresponding longitudinal edge 2a in the exemplary embodiment, the additional seam is formed by the sealed area which protrudes from the longitudinal seam 10 into the filling space 4 .
  • the dividing seam 6 serves on the one hand to delimit the ventilation space 8 from the filling space 4.
  • the dividing seam 6 also supports the formation of a cuboid shape of the filled gusseted bag. According to the designs known from the prior art, buckling occurs exactly along the separating seam 6, which is why in the designs known from the prior art the layers of the first front wall 1a and the first side gusset 3b lying on top of each other block the air passage 8 to a certain extent Dimensions can squeeze off.
  • the additional seam 14 in front causes a first buckling in the event of excess pressure and thus a certain distortion due to the forces acting between the first front wall 1a and the first side gusset 3a, which in the 3 is recognizable. Due to the forces acting at different points on the one hand on the additional seam 14 and on the other hand on the separating seam 6 during the overpressure, it is achieved that the first front wall 1a is always lifted off the first side gusset 3a and a passage remains for the discharge of air, so that in the event of an overpressure in the filling space 4 air can get reliably and in particular reproducibly through the air passage 9 into the ventilation space 8 and finally through the ventilation opening 7 to the outside.
  • a distance a between the beginning of the dividing seam 6 and the Point can be determined at which the additional seam 14 extends furthest along the transverse direction into the filling space.
  • This distance a can, for example, be between 3 mm and 30 mm, for example 10 mm, measured along the longitudinal direction.
  • the ventilation opening 7 is arranged adjacent at a small distance to a supporting seam 15 which connects the first front wall 1a and the first side gusset 3a and thus holds them together directly adjacent to the ventilation opening 7 .
  • the edges of the ventilation opening 7 formed as an incision lie exactly next to one another, so that there is good protection against dirt, moisture and access by insects or other vermin.
  • a stand-up base 16 is formed from a separate material section which is connected around its periphery to the front walls 1a, 1b and the side gussets 3a, 3b.
  • FIG 2 shows FIG 2 an embodiment simplified in this regard with a straight dividing seam 6 which is interrupted to form the air passage 9 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
  • Making Paper Articles (AREA)
EP20155221.3A 2020-02-03 2020-02-03 Seitenfaltenbeutel Active EP3858755B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
ES20155221T ES2964200T3 (es) 2020-02-03 2020-02-03 Bolsa de plegado lateral
HUE20155221A HUE064351T2 (hu) 2020-02-03 2020-02-03 Oldalredõs tasak
EP20155221.3A EP3858755B1 (de) 2020-02-03 2020-02-03 Seitenfaltenbeutel
PL20155221.3T PL3858755T3 (pl) 2020-02-03 2020-02-03 Torba z zakładkami bocznymi

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20155221.3A EP3858755B1 (de) 2020-02-03 2020-02-03 Seitenfaltenbeutel

Publications (2)

Publication Number Publication Date
EP3858755A1 EP3858755A1 (de) 2021-08-04
EP3858755B1 true EP3858755B1 (de) 2023-09-06

Family

ID=69467470

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20155221.3A Active EP3858755B1 (de) 2020-02-03 2020-02-03 Seitenfaltenbeutel

Country Status (4)

Country Link
EP (1) EP3858755B1 (es)
ES (1) ES2964200T3 (es)
HU (1) HUE064351T2 (es)
PL (1) PL3858755T3 (es)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1886929B1 (de) * 2006-08-10 2010-10-13 Haver & Boecker oHG Offener Seitenfalten-Sack aus einem schweißfähigen Material

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1868662U (de) 1963-01-11 1963-03-07 Osthushenrich Kg Kunststoffsack mit entlueftungsvorrichtung.
BE689438A (es) 1965-11-09 1967-04-14
DE102005022743B4 (de) 2005-05-18 2011-02-10 Nordenia Deutschland Halle Gmbh Folienbeutel und Verfahren zu seiner Herstellung
EP1820745A1 (de) 2006-02-17 2007-08-22 Mondi Packaging AG Flexible Verpackung mit einem Ventil zum Entlüften
JP5378210B2 (ja) 2006-07-17 2013-12-25 ダウ グローバル テクノロジーズ エルエルシー ノルボルネン化合物のｕｖ−ｖｉｓスペクトルを、それを用いる重合法に相関させるための方法、並びに関連精製方法および組成物
DE102007062814A1 (de) 2007-12-21 2009-06-25 Nordenia Deutschland Halle Gmbh Verpackung
DE102013109656A1 (de) 2013-09-04 2015-03-05 Mondi Halle Gmbh Seitenfaltenbeutel aus einem Kunststoffgewebeverbund

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1886929B1 (de) * 2006-08-10 2010-10-13 Haver & Boecker oHG Offener Seitenfalten-Sack aus einem schweißfähigen Material

Also Published As

Publication number Publication date
HUE064351T2 (hu) 2024-03-28
ES2964200T3 (es) 2024-04-04
EP3858755A1 (de) 2021-08-04
PL3858755T3 (pl) 2024-03-18

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