EP1839845B2 - Verfahren zur Herstellung von Umhüllungsmaterial und mit diesem Material versehene Packung - Google Patents

Verfahren zur Herstellung von Umhüllungsmaterial und mit diesem Material versehene Packung Download PDF

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Publication number
EP1839845B2
EP1839845B2 EP07104905.0A EP07104905A EP1839845B2 EP 1839845 B2 EP1839845 B2 EP 1839845B2 EP 07104905 A EP07104905 A EP 07104905A EP 1839845 B2 EP1839845 B2 EP 1839845B2
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European Patent Office
Prior art keywords
ribbon
slit
succession
slits
strip
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English (en)
French (fr)
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EP1839845A1 (de
EP1839845A8 (de
EP1839845B1 (de
Inventor
Silvano Boriani
Stefano Negrini
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GD SpA
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GD SpA
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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
    • B65D75/66Inserted or applied tearing-strings or like flexible elements
    • 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
    • B65D85/00Containers, packaging elements or packages, specially adapted for particular articles or materials
    • B65D85/07Containers, packaging elements or packages, specially adapted for particular articles or materials for compressible or flexible articles
    • B65D85/08Containers, packaging elements or packages, specially adapted for particular articles or materials for compressible or flexible articles rod-shaped or tubular
    • B65D85/10Containers, packaging elements or packages, specially adapted for particular articles or materials for compressible or flexible articles rod-shaped or tubular for cigarettes
    • B65D85/1018Container formed by a flexible material, i.e. soft-packages
    • B65D85/1027Opening devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B31MAKING 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
    • B31BMAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/14Cutting, e.g. perforating, punching, slitting or trimming
    • B31B50/16Cutting webs
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B31MAKING 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
    • B31BMAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/74Auxiliary operations
    • B31B50/81Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B50/812Applying tabs, patches, strips or strings on blanks or webs
    • B31B50/8125Applying strips or strings, e.g. tear strips or strings
    • B31B50/8126Applying strips or strings, e.g. tear strips or strings parallel to the direction of movement of the webs or the blanks
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B31MAKING 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
    • B31BMAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00Making flexible containers, e.g. envelopes or bags
    • B31B70/14Cutting, e.g. perforating, punching, slitting or trimming
    • B31B70/146Cutting, e.g. perforating, punching, slitting or trimming using tools mounted on a drum
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B31MAKING 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
    • B31BMAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00Making flexible containers, e.g. envelopes or bags
    • B31B70/14Cutting, e.g. perforating, punching, slitting or trimming
    • B31B70/16Cutting webs
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B31MAKING 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
    • B31BMAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00Making flexible containers, e.g. envelopes or bags
    • B31B70/74Auxiliary operations
    • B31B70/81Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B70/812Applying patches, strips or strings on sheets or webs
    • B31B70/8123Applying strips

Definitions

  • the present invention relates to a method of producing overwrap material, and to a pack covered with the material obtainable by such a method.
  • the present invention relates to packs for tobacco products, typically cigarette packets, and indeed reference is made to products of this type in the following specification, albeit implying no limitation in scope.
  • packets of cigarettes are provided with a protective outer wrapper of transparent heat-shrinkable material, referred to generally as overwrap material.
  • Dedicated packaging machines first envelop each successive pack in the overwrap material and then apply heat to the selfsame material, causing it to tighten against the outer faces of the pack.
  • the outer wrapper also incorporates a so-called tear tape or tear-off ribbon, of small transverse dimensions, by means of which the outer wrapper can be broken simply and swiftly when the moment comes to open up the pack.
  • the ribbon is decoiled continuously from a roll and applied, by welding or gluing, to a strip of overwrap material moving continuously along a predetermined feed direction.
  • a succession of U-shaped notches can then be fashioned in the overwrap material, placed along the line of the ribbon.
  • Each notch serves to free one end of the ribbon, thereby creating a tab that can be gripped and pulled to break open the pack neatly and easily.
  • the strip of wrapping material with its bonded ribbon is cut into discrete leaves, each providing one protective wrapper, and fed to the packaging machine.
  • the ribbon With the wrapper in place around the finished pack, the ribbon will be positioned on the inside of the overwrap material, peripherally adjacent to one end face on all sides, in such a way that the material can be torn in a direction transverse to its longitudinal dimension.
  • the ribbon is located near the top end face, so that when pulled along the tear line, the wrapper will divide into two portions: a smaller portion enveloping the end face, and a larger portion enveloping the main body of the packet.
  • the object of the present invention is to provide a method of producing overwrap material, also a pack furnished with an easily removable material obtained by such a method.
  • the invention relates to a method of producing overwrap material 1.
  • a continuous strip of preferably transparent and heat-shrinkable overwrap material 1 is caused to advance along a predetermined feed path "P" in a predetermined direction "A".
  • a predetermined area 2 of the advancing strip 1 is provided with slits or incisions 4 having a geometrical component transverse to the aforementioned direction "A".
  • the step in question involves creating a succession of such slits 4 through the agency of suitable cutting or punching means 5 composed of a main roller 5a carrying a blade 6, and a matching anvil roller 5b.
  • the two rollers 5a and 5b are set in contrarotation about respective axes extending transversely to the aforementioned feed direction "A".
  • the blade 6 presents a profile selected according to the shape of the slit 4 and strikes against the anvil roller 5b with each rotation of the main roller 5a, producing a slit 4 at each stroke.
  • a ribbon 7 of small transverse dimensions is applied to the strip of overwrap material 1; the ribbon 7 is decoiled from a roll 8, directed continuously downstream of a diverting roller 8a along a path "P1" parallel to the feed path "P”, and applied to the aforementioned area 2 of the strip in parallel alignment with the feed direction "A".
  • the ribbon 7 is bonded utilizing an ultrasonic welding unit 3 of familiar type, not described in detail.
  • the slits 4 are cut before applying the ribbon 7, so that the ribbon can be positioned relative to the selfsame slits.
  • the ribbon 7 is shown placed over a central portion 4a of the slit 4, so that the two respective ends 4b of the slit will be located on opposite sides of the ribbon 7.
  • the ribbon 7 can be placed over one end 4b of the slit 4, as illustrated clearly in figure 4 where the slits are shown staggered one from the next, or in a part of the area 2 adjacent to but not effectively coinciding with the slits 4.
  • the slits 4 are cut parallel one with another and appear substantially rectilinear, extending at right angles to the feed direction "A" and to the longitudinal dimension of the ribbon 7.
  • the slits 4 are cut parallel with one another and angled obliquely, relative to the longitudinal dimension of the ribbon 7.
  • Figures 5 and 6 illustrate examples in accordance with the invention in which the slits 4 are generated as chevrons, each presenting a vertex 9 that coincides with the line of the ribbon 7.
  • the chevron slits 4 can be disposed, as in the example of figure 5 , with the vertex 9 oriented along a tear direction "B" of the narrow ribbon.
  • the selfsame slits 4 can be disposed with the vertex 9 oriented in a direction opposite to the tear direction "B" of the ribbon 7, as in figure 6 .
  • the step of applying the ribbon 7 to the strip of overwrap material 1 is followed by a step of forming a U-shaped notch 10 in the aforementioned area 2 of the strip.
  • the U-shaped notch 10 is positioned between two successive slits 4 of the type cut previously, and serves to create a pull tab 11 at one end of the ribbon 7, as will be described in due course.
  • a succession of the U-shaped notches 10 will be generated through the agency of a further blade 12 of conventional type (not illustrated), by which the ribbon 7 is cut transversely.
  • the strip of overwrap material 1 is divided up into discrete lengths, or leaves 13, which are then fed into an overwrapping unit not illustrated in the accompanying drawings, being of conventional type and only incidental to the present invention.
  • the step of dividing the strip of overwrap material 1 into leaves is effected by a pair of contrarotating cutter rollers 14 equipped with respective blades 14a.
  • Each leaf 13 cut by the rollers 14 presents a succession of slits 4 and one U-shaped notch 10.
  • the strip of overwrap material 1 is wound onto a reel (not illustrated) for use by the overwrapping unit.
  • overwrap material 1 obtained by the method thus described is utilized for packs 15 of the type illustrated in figures 7 and 8 .
  • the pack 15 of figures 7 and 8 consists in a pack of cigarettes, around which the overwrap material 1 provides a protective outer wrapper 16.
  • the wrapper 16 appears with the aforementioned ribbon 7 extending peripherally around one end face of the pack 15.
  • the ribbon 7 is disposed with the tear direction "B" extending parallel to its own longitudinal dimension, and occupying a plane transverse to the longitudinal dimension of the pack 15.
  • the wrapper 16 is opened by hand, gripping the tab 11 of the ribbon 7 and pulling. This causes the ribbon 7 to break the overwrap material 1 along the aforementioned tear direction "B" until the first slit 4 is encountered.
  • This slit 4 shown perpendicular to the ribbon 7 in figure 7 , will at this point initiate two new break lines 17 departing and diverging from the line of the ribbon 7 on either side.
  • wrapper 16 shown in figures 7 and 8 presents just one slit 4, according to the invention a succession of slits 4 is provided in order to facilitate the removal of the material 1, wherein the number of slits depends on the size of the pack 15.
  • the pack 15 does not need to be extracted from the wrapper 16 once a tear has been made with the ribbon 7.
  • the action of pulling the ribbon 7 serves also to initiate the break lines 17 and allow the wrapper 16 to be torn off completely, without the material sticking fast to the outer faces of the pack 15. Accordingly, the pack 15 is spared any damage that might be caused in the attempt to remove portions of the overwrap material 1 that continue to cling to the outer surfaces.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)
  • Packages (AREA)
  • Wrapping Of Specific Fragile Articles (AREA)
  • Wrappers (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)

Claims (10)

  1. Verfahren zur Herstellung von Zigarettenpackungsumhüllungsmaterial, das als äußere Schutzhülle für Zigarettenpackungen verwendbar ist, beinhaltend die folgenden Schritte:
    - Veranlassen des Vorschubs eines Endlosstreifens aus transparentem, wärmeschrumpfendem Umhüllungsmaterial (1) entlang eines vorbestimmten Zufuhrpfades (P) in einer vorbestimmten Vorschubrichtung (A);
    - Bearbeiten eines vorbestimmten Bereichs (2) des Streifens von Umhüllungsmaterial (1), sodass eine Aufeinanderfolge von Schlitzen oder Einschnitten (4) geschaffen wird, die im vorbestimmten Bereich (2) des Streifens geschaffen sind und voneinander beabstandet sind, wobei jeder Schlitz oder Einschnitt (4) eine geometrische Komponente aufweist, die quer zur Vorschubrichtung (A) ist;
    - Aufbringen eines Bands (7) kleiner Querdimensionen auf den Streifen (1) entlang des vorbestimmten Bereichs (2) über einen zentralen Abschnitt (4a) eines jeden Schlitzes (4), sodass zwei jeweilige Enden (4b) eines jeden Schlitzes (4) an gegenüberliegenden Seiten des Bands (7) liegen, wobei der Schritt des Schaffens der Aufeinanderfolge von Schlitzen (4) vor dem Schritt des Aufbringens des Bands (7) kleiner Querdimensionen erfolgt;
    das Verfahren beinhaltet ferner den Schritt des Schaffens einer Aufeinanderfolge von U-förmigen Einkerbungen (10) im vorbestimmten Bereich (2) des Streifens (1), der nach dem Schritt des Aufbringens des Bands (7) erfolgt, wobei die U-förmige Einkerbung (10) eine Greiflasche (11) des Bands (7) bildet, die zu einem entsprechenden Schlitz (4) hin gezogen werden kann, um das Umhüllungsmaterial abzureißen; sowie die folgenden Schritte, die nach dem Schritt des Schaffens der U-förmigen Einkerbungen (10) erfolgen:
    - Einteilen des Streifens (1) in einzelne Blätter (13), sodass jedes Blatt (13) eine U-förmige Einkerbung (10) und eine Aufeinanderfolge von Schlitzen (4) aufweist, die im vorbestimmten Bereich (2) des Streifens geschaffen sind und voneinander beabstandet sind, und
    - Zuführen der Blätter (13) zu einer Umhüllungseinheit.
  2. Verfahren zur Herstellung von Zigarettenpackungsumhüllungsmaterial, das als äußere Schutzhülle für Zigarettenpackungen verwendbar ist, beinhaltend die folgenden Schritte:
    - Veranlassen des Vorschubs eines Endlosstreifens aus transparentem, wärmeschrumpfendem Umhüllungsmaterial (1) entlang eines vorbestimmten Zufuhrpfades (P) in einer vorbestimmten Vorschubrichtung (A);
    - Bearbeiten eines vorbestimmten Bereichs (2) des Streifens von Umhüllungsmaterial (1), sodass eine Aufeinanderfolge von Schlitzen oder Einschnitten (4) geschaffen wird, die im vorbestimmten Bereich (2) des Streifens geschaffen sind und voneinander beabstandet sind, wobei jeder Schlitz oder Einschnitt (4) eine geometrische Komponente aufweist, die quer zur Vorschubrichtung (A) ist;
    - Aufbringen eines Bands (7) kleiner Querdimensionen auf den Streifen (1) entlang des vorbestimmten Bereichs (2) über einen zentralen Abschnitt (4a) eines jeden Schlitzes (4), sodass zwei jeweilige Enden (4b) eines jeden Schlitzes (4) an gegenüberliegenden Seiten des Bands (7) liegen, wobei der Schritt des Schaffens der Aufeinanderfolge von Schlitzen (4) vor dem Schritt des Aufbringens des Bands (7) kleiner Querdimensionen erfolgt;
    wobei das Verfahren ferner Folgendes beinhaltet:
    - einen Schritt des Schaffens einer Aufeinanderfolge von U-förmigen Einkerbungen (10) im vorbestimmten Bereich (2) des Streifens (1), der nach dem Schritt des Aufbringens des Bands (7) erfolgt, wobei die U-förmige Einkerbung (10) eine Greiflasche (11) des Bands (7) bildet, die zu einem entsprechenden Schlitz (4) hin gezogen werden kann, um das Umhüllungsmaterial abzureißen; wobei der Schritt des Schaffens von U-förmigen Einkerbungen (10) im vorbestimmten Bereich (2) des Streifens (1) durch das Platzieren der U-förmigen Einkerbungen (10) in einer Position so durchgeführt wird, dass zwischen zwei aufeinanderfolgenden U-förmigen Einkerbungen (10) eine Aufeinanderfolge von Schlitzen (4) beinhaltet ist; und
    - nach dem Einschneiden der U-förmigen Einkerbungen (10), einen Schritt des Aufwickelns des Streifens des Umhüllungsmaterials (1) auf eine Rolle zur Verwendung durch eine Umhüllungseinheit.
  3. Verfahren nach Anspruch 1 oder 2, wobei der Schritt des Schaffens der Aufeinanderfolge von Schlitzen (4) das Platzieren eines jeden Schlitzes (4) im rechten Winkel zur Längsdimension des Bands (7) kleiner Querdimensionen einbezieht.
  4. Verfahren nach einem der Ansprüche 1 bis 3, wobei der Schritt des Schaffens der Aufeinanderfolge von Schlitzen (4) das Platzieren eines jeden Schlitzes (4) im schiefen Winkel zur Längsdimension des Bands (7) kleiner Querdimensionen einbezieht.
  5. Zigarettenpackung, umfassend eine Packung, die mit einer Schutzhülle (16) versehen ist, die aus einem Blatt transparenten, wärmeschrumpfenden Umhüllungsmaterials (1) und einem Band (7) kleiner Querdimensionen besteht, das mit einem vorbestimmten Bereich (2) des Materials (1) verbunden ist,
    dadurch gekennzeichnet,
    dass die Hülle (16) Folgendes aufweist:
    - eine Aufeinanderfolge von Schlitzen (4), die im vorbestimmten Bereich (2) des Umhüllungsmaterials (1) geschaffen sind und voneinander beabstandet sind, wobei jeder Schlitz (4) eine geometrische Komponente aufweist, die quer zur Längsdimension des Bands (7) kleiner Querdimensionen ist, und
    - eine Einkerbung (10) in U-Form, die im vorbestimmten Bereich (2) des Umhüllungsmaterials (1) geschaffen ist und eine Lasche (11) an einem Ende des Bands (7) bildet, sodass sie gegriffen und gezogen werden kann,
    um die Hülle (16) abzureißen,
    wobei jeder Schlitz (4) der Aufeinanderfolge von Schlitzen (4) V-förmig ist, aufweisend eine Spitze (9), über der das Band (7) kleiner Querdimensionen platziert ist, oder
    wobei jeder Schlitz der Aufeinanderfolge von Schlitzen (4) im Wesentlichen geradlinig mit dem Band (7) erscheint, das über einem zentralen Abschnitt (4a) eines jeden Schlitzes der Aufeinanderfolge von Schlitzen (4) platziert ist, der zwischen zwei entsprechenden Enden (4b) eines jeden Schlitzes (4) liegt.
  6. Packung nach Anspruch 5, wobei sich jeder Schlitz (4) der Aufeinanderfolge von Schlitzen (4) im rechten Winkel zur Längsdimension des Bands (7) erstreckt.
  7. Packung nach Anspruch 5, wobei sich jeder Schlitz (4) der Aufeinanderfolge von Schlitzen (4) im schiefen Winkel zur Längsdimension des Bands (7) erstreckt.
  8. Packung nach Anspruch 5, wobei die Spitze (9) eines jeden V-förmigen Schlitzes (4) in eine Richtung ausgerichtet ist, die mit einer Abreißrichtung (B) des Bands (7) übereinstimmt.
  9. Packung nach Anspruch 5, wobei die Spitze (9) eines jeden V-förmigen Schlitzes (4) in eine Richtung ausgerichtet ist, die zu einer Abreißrichtung (B) des Bands (7) entgegengesetzt ist.
  10. Zigarettenpackung, dadurch gekennzeichnet, dass sie eine Packung (15) nach einem der Ansprüche 5 bis 9 umfasst.
EP07104905.0A 2006-03-29 2007-03-26 Verfahren zur Herstellung von Umhüllungsmaterial und mit diesem Material versehene Packung Active EP1839845B2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000214A ITBO20060214A1 (it) 2006-03-29 2006-03-29 Metodo per la produzione di materiale da sovraincarto e confezione dotata del materiale cosi' prodotto.

Publications (4)

Publication Number Publication Date
EP1839845A1 EP1839845A1 (de) 2007-10-03
EP1839845A8 EP1839845A8 (de) 2007-12-19
EP1839845B1 EP1839845B1 (de) 2009-10-28
EP1839845B2 true EP1839845B2 (de) 2014-12-03

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US (1) US20070228040A1 (de)
EP (1) EP1839845B2 (de)
JP (1) JP5242930B2 (de)
CN (1) CN101045344A (de)
DE (1) DE602007002937D1 (de)
IT (1) ITBO20060214A1 (de)

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GB0714418D0 (en) 2007-07-24 2007-09-05 Innovia Films Ltd UV barrier film
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ITBO20110721A1 (it) * 2011-12-15 2013-06-16 So Te Ma Pack S R L Confezione provvista di mezzi di lacerazione e apertura della confezione, procedimento e dispositivo utilizzabili per realizzare detta confezione.
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JP6145253B2 (ja) * 2012-06-22 2017-06-07 朋和産業株式会社 米飯加工食品用包装材
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ITBO20130086A1 (it) * 2013-02-28 2014-08-29 Gd Spa Confezione di articoli da fumo, in particolare di sigarette, e metodo per la sua produzione.
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JP6292375B2 (ja) * 2013-11-28 2018-03-14 株式会社スズパック おにぎり包装材及び該包装材に包装されたおにぎり包装体
JP6564391B2 (ja) * 2014-03-25 2019-08-21 ジー.デー ソチエタ ペル アツィオニG.D Societa Per Azioni 包装材シート、喫煙製品用包装箱および包装材シートを作製するための方法
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CN107458029B (zh) * 2017-08-09 2020-06-02 蔡任文 一种塑料包装袋及其制作方法
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JP7324629B2 (ja) * 2019-07-10 2023-08-10 朋和産業株式会社 カットテープ貼着装置及びカットテープ付きシート原反の製造方法
IT202000032231A1 (it) 2020-12-23 2022-06-23 Gd Spa Pacchetto di articoli da fumo provvisto di un sovraincarto indebolito.
IT202000032222A1 (it) 2020-12-23 2022-06-23 Gd Spa Pacchetto di articoli da fumo con coperchio incernierato e provvisto di un sovraincarto.

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GB2135651A (en) 1983-02-18 1984-09-05 Kanari Tani Easy-to-open synthetic resin bag and apparatus for the manufacture thereof
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JP5242930B2 (ja) 2013-07-24
CN101045344A (zh) 2007-10-03
EP1839845A1 (de) 2007-10-03
EP1839845A8 (de) 2007-12-19
ITBO20060214A1 (it) 2006-06-28
DE602007002937D1 (de) 2009-12-10
US20070228040A1 (en) 2007-10-04
JP2007261689A (ja) 2007-10-11
EP1839845B1 (de) 2009-10-28

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