EP3277596B1 - Verfahren zur kontinuierlichen herstellung eines kunststoffbeutels für nahrungsmittel - Google Patents

Verfahren zur kontinuierlichen herstellung eines kunststoffbeutels für nahrungsmittel Download PDF

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Publication number
EP3277596B1
EP3277596B1 EP16717424.2A EP16717424A EP3277596B1 EP 3277596 B1 EP3277596 B1 EP 3277596B1 EP 16717424 A EP16717424 A EP 16717424A EP 3277596 B1 EP3277596 B1 EP 3277596B1
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EP
European Patent Office
Prior art keywords
weld line
cut
oblique
bag
transversal
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
EP16717424.2A
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English (en)
French (fr)
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EP3277596A1 (de
Inventor
Eric Albert Léon VALETTE
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.)
Coveris Flexibles France SA
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Coveris Flexibles France SA
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Publication date
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Priority to PL16717424T priority Critical patent/PL3277596T3/pl
Publication of EP3277596A1 publication Critical patent/EP3277596A1/de
Application granted granted Critical
Publication of EP3277596B1 publication Critical patent/EP3277596B1/de
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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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • B31B2155/001—Flexible containers made from webs by folding webs longitudinally
    • B31B2155/0012—Flexible containers made from webs by folding webs longitudinally having their openings facing in the direction of movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • B31B2155/003—Flexible containers made from webs starting from tubular webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00—Shape of flexible containers
    • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00—Shape of flexible containers
    • B31B2160/20—Shape of flexible containers with structural provision for thickness of contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00—Shape of flexible containers
    • B31B2160/30—Shape of flexible containers pointed or tapered
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/14—Cutting, e.g. perforating, punching, slitting or trimming
    • B31B70/148—Cutting-out portions from the sides of webs or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/26—Folding sheets, blanks or webs
    • B31B70/262—Folding sheets, blanks or webs involving longitudinally folding, i.e. along a line parallel to the direction of movement
    • B31B70/266—Folding sheets, blanks or webs involving longitudinally folding, i.e. along a line parallel to the direction of movement involving gusset-forming

Definitions

  • the invention relates to the technical sector of plastic packaging bags, especially for the packaging of food products.
  • the invention relates to a preformed flexible plastic bag, in particular obtained from a film having a thickness of less than about 200 ⁇ m.
  • This type of bag comprises a front wall and a rear wall assembled at their lateral sides, in combination with bellows, delimiting a bottom and a filling opening.
  • these preformed bags are made continuously, from a single plastic film, such as PE with or without added OPP, or PE added with PET, or any other materials perfectly known for a skilled in the art commonly employed in the field of food packaging.
  • the plastic film is subjected continuously to successive operations of folding and welding, to make a bag as such, with as indicated, a bottom, two walls, joined by bellows, and a filling opening opposite to background.
  • the external pleats, at the bellows and wall connections, are assembled by continuous welding lines.
  • the bottom of the bag is made by any known and appropriate means.
  • the side gussets are spread apart, thus giving volume to the shape of the bag, and indirectly, participate in the formation of a bottom, to allow to maintain the bag in a vertical position, or substantially vertical.
  • This stability is also important for the storage and presentation of bags.
  • the invention proposes an alternative solution to solve the problem of improving stability, while aiming to reduce the thickness, and improve the aesthetics of the bag.
  • the manufacturing method according to the invention is characterized in that the cutting of each triangular zone is performed from the outer edge of the bellows, along the outer edge of the oblique welding line, to the outer edge of the line of transverse welding, then the cutting is continued transversely towards the inside of the plastic film sheath along the outer edge of the transverse welding line to make a semicircle away from the transverse welding line to return back and continue cutting transversely to the outer edge of the sheath, parallel to the transverse weld line.
  • the plastic food product packaging bag obtained comprises a front wall and a rear wall assembled, on the one hand, at their lateral sides, in combination with bellows forming two folds, and secondly at one of their transverse side with said bellows, to form a bottom.
  • the outer lateral edges of the bellows are connected to the bottom by oblique cutting lines, so that after filling of the bag corresponding to the spacing of the bellows, said oblique lines form symmetrically, on either side of the bottom, a clearance in triangle, without overthickness, thus improving the stability of said bag in vertical filling position.
  • the oblique cut lines are formed from the bottom and the median line of the two folds of each bellows.
  • the outer edges of the bellows, at their connection with the walls, including the oblique cutting lines, have a weld zone.
  • the food bag designated as a whole by (1) is made of a flexible plastic material, in particular of thickness less than 200 microns.
  • the bag is, in a perfectly known manner, obtained from a roll of film unrolled continuously, and subjected to various operations, including automatic folding and welding.
  • the bag obtained has a front wall (1a) and a rear wall (1b) assembled at their lateral sides in combination with bellows (1c,) and (1d).
  • the bag has, moreover, a bottom (1e) and a filling opening (1f).
  • Each of the bellows (1c) and (1d) form two folds (a) and (b).
  • the bottom (1e) is welded at the connection of one of the transverse sides of the walls, with the bellows.
  • the external lateral edges of the bellows (1c) and (1d), at their connection with the front and rear walls of the bag, are connected to the bottom (1e) by oblique cutting lines (1c1) ( 1c2) and (1d1) and (ld2) ( Figures 2, 3 and 6 ).
  • the oblique cutting lines are formed from the bottom (1e) and the median line (c) of the two folds (a) and (b) of each bellows.
  • the external lateral edges of the bellows (1c, 1d), at their connection with the front (1a) and rear (1b) walls, including at the oblique cutting lines, have a weld line (L).
  • FIG 7 shows the method of continuously manufacturing a food packaging bag, according to the features of the invention from a sheath of a plastic film.
  • the film is subjected to successive bending operations to achieve the lateral bellows between two walls.
  • a longitudinal weld line (L1) is made at the connection of the external edges of the bellows with the front and rear walls.
  • a transverse weld line (L2) constituting the bottom (1e) and an oblique weld line (L3) between the outer walls of each of the bellows and the weld line (L2) constituting the bottom are produced at regular intervals. , [step (A)].
  • the oblique weld lines (L3) and the transverse weld lines (L2) are made one after the other in separate steps, and with separate tools. The order in which these lines is not important.
  • the oblique weld lines (L3) can be made before or after the transverse weld lines (L2).
  • the method is more flexible in that it is possible to vary the inclination of the oblique welds or to move them transversely, and thus to modify the manufactured bag, without having to change tools.
  • These characteristics also make it possible to adjust the position of the oblique lines (L3) according to the dimensional differences found in the manufacturing process.
  • the manufacturing process is simple, fast, and accurate.
  • step (B)] the triangular zone (T) resulting from the weld lines (L1) (L2) and (L3), [step (B)] is cut.
  • cut can be shaped so as to achieve rounded edges, or not.
  • the cut is made from the outer edge of the bellows (1c, 1d), along the outer edge of the oblique weld line (L3), to the outer edge of the transverse weld line (L2), then the cut is continued transversely to the inside of the plastic film sheath along the outer edge of the transverse weld line (L2) to a semicircle away from the transverse weld line (L2) for go back and continue cutting transversely to the outer edge of the sheath, parallel to the transverse weld line (L2).
  • this cutting is performed by a double blade, the spacing of the blades allows for a cut by sealing on either side the transverse cuts made during the cutting of the triangular areas (see figure 8 ).
  • the transverse weld lines formed during the cutting of the triangular areas are found arranged between the two blades during the double cutting.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)
  • Bag Frames (AREA)

Claims (3)

  1. Verfahren zur kontinuierlichen Herstellung eines Verpackungsbeutels für Lebensmittel auf Grundlage eines Schlauchs einer Kunststofffolie, wonach:
    - der Film aufeinanderfolgenden Faltoperationen unterzogen wird, um Seitenfalten (1c, 1d) zwischen zwei Lagen (1a, 1b) auszuführen,
    - es eine Längsschweißnaht (L1) in Höhe des Anschlusses der Außenränder der Seitenfalten (1c, 1d) an die Lagen (1a, 1b) ausgeführt wird,
    - eine Querschweißnaht (L2) in regelmäßigen Abständen ausgeführt wird, die einen Boden (1e) bildet,
    - eine Schrägschweißnaht (L3) in regelmäßigen Abständen zwischen den Außenrändern der Seitenfalten (1c, 1d) und der Querschweißnaht (L2), die den Boden (1e) bildet, ausgeführt wird,
    - es eine dreieckige Zone ausgeschnitten wird, die sich aus den Schrägschweiß-(L3) und Bodenschweißnähten (1e) ergibt,
    - es ein Schnitt in Höhe des Bodens (1e) beiderseits symmetrisch zu den schrägen Nähten ausgeführt wird, um eine Beutelöffnung zu bilden;
    Herstellungsverfahren, dadurch gekennzeichnet, dass das Ausschneiden jeder dreieckigen Zone vom Außenrand der Seitenfalten (1c, 1d) aus entlang dem Außenrand der Schrägschweißnaht (L3) bis zum Außenrand der Querschweißnaht (L2), ausgeführt wird, dass das Ausschneiden dann in Querrichtung nach innen des Kunststofffolienschlauchs, entlang des Außenrandes der Querschweißnaht (L2) fortgesetzt wird und schließlich einem Halbkreis folgt, indem es sich von der Querschweißnaht (L2) entfernt und zurückführt und indem das Ausschneiden quer bis zum Außenrand des Schlauchs parallel zur Querschweißnaht (L2) fortsetzt.
  2. Verfahren gemäß Anspruch 1, dadurch gekennzeichnet, dass die dreieckigen Zonen in einer Art und Weise ausgeschnitten werden, dass runde Kanten entstehen.
  3. Verfahren gemäß Anspruch 1, dadurch gekennzeichnet, dass das Ausschneiden in Höhe des Bodens (1e) mit einer Doppelklinge erfolgt, bei der der Abstand der beiden Klingen so ist, dass beim doppelten Ausschneiden, die Querschnitte, die beim Ausschneiden der dreieckigen Zonen hergestellt werden, zwischen diesen beiden Klingen ausgeführt werden.
EP16717424.2A 2015-03-31 2016-03-24 Verfahren zur kontinuierlichen herstellung eines kunststoffbeutels für nahrungsmittel Active EP3277596B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL16717424T PL3277596T3 (pl) 2015-03-31 2016-03-24 Sposób ciągłego wytwarzania torby z tworzywa sztucznego na produkty spożywcze

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1552713A FR3034406B1 (fr) 2015-03-31 2015-03-31 Procede de fabrication en continu d'un sac en matiere plastique
PCT/FR2016/050669 WO2016156712A1 (fr) 2015-03-31 2016-03-24 Procede de fabrication en continu d'un sac en matiere plastique pour produits alimentaires

Publications (2)

Publication Number Publication Date
EP3277596A1 EP3277596A1 (de) 2018-02-07
EP3277596B1 true EP3277596B1 (de) 2018-11-21

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Application Number Title Priority Date Filing Date
EP16717424.2A Active EP3277596B1 (de) 2015-03-31 2016-03-24 Verfahren zur kontinuierlichen herstellung eines kunststoffbeutels für nahrungsmittel

Country Status (8)

Country Link
EP (1) EP3277596B1 (de)
DK (1) DK3277596T3 (de)
ES (1) ES2701953T3 (de)
FR (1) FR3034406B1 (de)
PL (1) PL3277596T3 (de)
PT (1) PT3277596T (de)
TR (1) TR201819432T4 (de)
WO (1) WO2016156712A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110857164B (zh) * 2018-08-22 2021-07-06 东莞市新力邦机械有限公司 一种四方袋的制作设备

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3119548A (en) * 1961-06-08 1964-01-28 Dale Products Plastics Ltd Plastic bags
DE1786047A1 (de) * 1968-08-10 1971-11-11 Neemann Mechanische Papierware Aus einer Verbundfolie bestehender Folienbeutel
US4789350A (en) * 1986-04-19 1988-12-06 Honsel Karl Heinz Method and apparatus for manufacturing mailing envelopes or bags
FR2672033A1 (fr) * 1991-01-25 1992-07-31 Bottari Pierre Sac polygonal a paroi transversale plane et dispositif pour sa mise en óoeuvre.
JP3845163B2 (ja) * 1997-01-28 2006-11-15 株式会社フジシールインターナショナル 注出口を有する容器の製造装置
JPH1143155A (ja) * 1997-07-23 1999-02-16 Hosokawa Yoko Co Ltd 液体容器
JPH11222244A (ja) * 1998-02-02 1999-08-17 Hosokawa Yoko:Kk 医薬、医療用ガセット袋
EP1106339B1 (de) * 1999-12-02 2006-09-27 Totani Corporation Maschine zur Herstellung von Kunststoffbeuteln
FR2833928B1 (fr) 2001-12-26 2004-02-13 Autobar Flexible France Sac d'emballage avec fonf preforme

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
WO2016156712A1 (fr) 2016-10-06
DK3277596T3 (da) 2019-01-02
FR3034406B1 (fr) 2017-12-08
ES2701953T3 (es) 2019-02-26
TR201819432T4 (tr) 2019-01-21
FR3034406A1 (fr) 2016-10-07
EP3277596A1 (de) 2018-02-07
PL3277596T3 (pl) 2019-04-30
PT3277596T (pt) 2018-11-30

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