EP0893361B1 - Mit einer Kunststoffolie umhüllte Gegenstandsverpackung, sowie eine Kunststoffolie für eine solche Verpackung und Verfahren zur Herstellung einer solchen Kunststoffolie - Google Patents

Mit einer Kunststoffolie umhüllte Gegenstandsverpackung, sowie eine Kunststoffolie für eine solche Verpackung und Verfahren zur Herstellung einer solchen Kunststoffolie Download PDF

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Publication number
EP0893361B1
EP0893361B1 EP98401739A EP98401739A EP0893361B1 EP 0893361 B1 EP0893361 B1 EP 0893361B1 EP 98401739 A EP98401739 A EP 98401739A EP 98401739 A EP98401739 A EP 98401739A EP 0893361 B1 EP0893361 B1 EP 0893361B1
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EP
European Patent Office
Prior art keywords
film
perforations
pack
zone
articles
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.)
Expired - Lifetime
Application number
EP98401739A
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English (en)
French (fr)
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EP0893361A1 (de
Inventor
Daniel Meilhon
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.)
Soplaril SA
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Soplaril SA
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Filing date
Publication date
Application filed by Soplaril SA filed Critical Soplaril SA
Publication of EP0893361A1 publication Critical patent/EP0893361A1/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
    • B65D71/00—Bundles of articles held together by packaging elements for convenience of storage or transport, e.g. portable segregating carrier for plural receptacles such as beer cans or pop bottles; Bales of material
    • B65D71/06—Packaging elements holding or encircling completely or almost completely the bundle of articles, e.g. wrappers
    • B65D71/08—Wrappers shrunk by heat or under tension, e.g. stretch films or films tensioned by compressed articles
    • 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
    • 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
    • B65D75/5827—Tear-lines provided in a wall portion
    • B65D75/5833—Tear-lines provided in a wall portion for tearing out a portion of the wall
    • B65D75/5844—Tear-lines provided in a wall portion for tearing out a portion of the wall the portion of the wall being a narrow strip, e.g. between lines of weakness
    • 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
    • B65D71/00—Bundles of articles held together by packaging elements for convenience of storage or transport, e.g. portable segregating carrier for plural receptacles such as beer cans or pop bottles; Bales of material
    • B65D71/06—Packaging elements holding or encircling completely or almost completely the bundle of articles, e.g. wrappers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1328—Shrinkable or shrunk [e.g., due to heat, solvent, volatile agent, restraint removal, etc.]

Definitions

  • the invention relates to a pack of objects, such as cans, cans, bottles, etc., packed with a plastic film having a preferential direction of tearing, several objects being arranged side by side in one or more layers superimposed, the film being folded in a direction winding around the objects it encloses, means being provided on the film to facilitate its tear.
  • Such a pack is prepared in a known manner by wrapping the group of objects.
  • Bundling consists of surround all of the objects to be packaged with a film heat-shrinkable plastic, in particular of a heat shrinkable polyethylene film.
  • the envelope produced with the film is welded on the overlapping edges so as to form a sleeve around the objects grouped.
  • Objects can be tightened by example, by the effect of heat which causes the tightening of the film around the objects it envelops.
  • the two open ends of the sleeve shrink to form an opening at the two ends of the pack oval shape, usually called the lunula.
  • a solution according to the preamble of claims 1 and 12, already proposed by EP-A-0537079, consists in providing as a means of opening tongues, for example of rectangular shape, the large dimension is oriented parallel to the preferential direction of tearing, these tabs being precut along their two long sides and a small side.
  • Such tabs are produced by "cookie cutter” type fingerprints, in places distant from each other.
  • the object of the invention is, above all, to provide a pack of objects in which the means of opening the film made of plastic allow easy opening and controlled burden of the pack of objects in one as many points as possible, so that allow the user to choose the most suitable for each opening.
  • the object pack is characterized by the fact that the means for opening the plastic film include a continuous area attenuation oriented transversely to the preferential direction of tearing, and forming a belt that surrounds the pack, this area weakening having mechanical strength strong enough to withstand tensile forces exerted on the film to enclose the objects, but low enough to allow film opening without tools at any point in the area, by priming a tongue and pulling on the tongue in a direction transverse to the direction of the area weakening.
  • the continuous weakening zone is perpendicular to the preferred direction of tearing.
  • the continuous weakening zone includes at least one line of perforations, in particular regularly spaced.
  • the continuous weakening zone includes a central line of perforations surrounded by two parallel lines of perforations, away from the center line, and in which the distance between two successive perforations is greater than the distance between two perforations successive of the central line.
  • the distance between two successive perforations of the lines is equal to twice the distance between two perforations in the center line.
  • the perforations of the two outer lines are advantageously aligned with a line perforation central in a direction orthogonal to the line Central.
  • the patterns created by the perforations have thus the shape of an I.
  • the plastic packaging film is preferably a two-layer film whose direction of preferential tear is perpendicular to the extrusion direction.
  • the film is in particular a film coextruded ionomer polyethylene.
  • Such a film can be consisting of at least one layer of polyolefin and at minus one layer of an ionic copolymer.
  • Punch lines may be distant from 5 to 30 mm, over a width of 30 to 100 mm.
  • the invention also relates to a film in plastic material for wrapping of pack objects, this film with a preferred direction of tearing and being characterized by the presence of a continuous zone of weakness oriented transversely, especially perpendicular to the direction preferential tearing.
  • This continuous weakening zone includes at minus a line of perforations spaced regularly, and preferably at least three lines of perforations, know a center line where the perforations are less set apart only in two outer lines parallel to the central line and located on either side, the perforations in the center line and lines exterior preferably making I-patterns.
  • a process of film preparation consists in making the perforations when unwinding or winding the front film the packaging, along its entire length, in particular at extrusion, rewinding, printing or on the shrinkwrapper, by a device made up of rollers needles with a brush-like counterpart cylindrical.
  • the plastic film to be perforated scrolls between the needle roller and its counterpart.
  • This operation can be repeated across the width of the film, in consideration of the end use, in order to create several continuous parallel weakening zones to each other, in the direction of the length of the movie.
  • FIG. 1 of the drawing we can see a pack 1 of objects 2 made up of boxes of canned, cans or the like, wrapped in film 3 made of plastic, generally transparent. Several objects are arranged side by side, following two horizontal layers superimposed in the example shown in Figure 1. A plate 4, in particular of cardboard, separates the two tablecloths.
  • Film 3 has been folded in one direction of winding E to form a sleeve around the burden constituted by objects 2.
  • the edges of this sleeve perpendicular to direction E are welded one to the other.
  • the arrangement of objects forms globally a rectangular parallelepiped whose large sides are perpendicular to the winding direction of the film.
  • the open ends of the sleeve made around the packaging correspond to the small sides of the parallelepiped.
  • the film 3 is subjected to a heat treatment causing it to tighten around objects 2 so that the open ends of the sleeve tighten also to form oval openings 5, or lunula, appreciably in the center of each small face end of the parallelepiped.
  • Film 3 has a preferred direction tear D parallel to the long sides of the parallelepiped.
  • the film 3 is advantageously constituted by a film comprising at least two layers.
  • the film is formed at least two thermoplastic resins, and the management preferential tear D of the film is substantially perpendicular to the extrusion direction E which is the same as the winding direction.
  • the film is in particular formed from at least one polyolefin layer and at least one layer of an ionic copolymer.
  • the movie is, for example, an ionomer coextruded polyethylene film.
  • a film according to EP-A-0537080 is particularly suitable.
  • Pack 1 includes opening means formed by a continuous zone A of weakening of the film 3 oriented transversely, preferably perpendicular to the preferred direction of tear D of the film. Zone A forms a belt 6 which surrounds the pack on four sides of the parallelepiped.
  • a only belt 6 is provided, mid-length of the large sides of the parallelepiped, that is to say halfway down the film 3. It is possible, as required, to plan several parallel belts 6, spaced along the film width 3.
  • the continuous weakening zone A is thus oriented in the direction of unwinding of the film reel 3.
  • Zone A includes a central line 7 of perforations 8, regularly spaced, aligned orthogonally to direction D.
  • Two outer lines 9, 10 of perforations are located on either side of the center line 7 parallel to it, equidistant, and have perforations 11a, 11b.
  • the distance h between the lines of perforations is preferably between 5 and 30 mm.
  • the width L of the weakening zone is preferably between 30 and 100 mm. This width L corresponds to the distance between the outer edges of the perforations in lines 9 and 10.
  • the distance f between two perforations 11a or 11b outer lines 9 and 10 is greater than the distance g of two successive perforations 8 of the line central 7.
  • the perforations 11a, 11b of the two lines outside are aligned with a perforation 8 of the central line 7 in a direction orthogonal to this central line.
  • the perforations 8, 11a, 11b can be made during the extrusion of the film 3, or else during its rewinding, either in printing, or in the device (shrink wrapper) to make the pack.
  • the perforations are preferably made by a device (not shown) consisting of rollers hot or cold needles, with a counterpart in cylindrical brush shape on which the movie.
  • Punch needles have a diameter about 1 mm and a length of about 10 mm and are mounted on rotating shafts, the film to be perforated running between the needle roller and its counterpart.
  • the precut formed by zone A is thus performed continuously.
  • Figure 2 are shown the contours circulars 12 of cans of the same diameter tangent to each other and defining between them empty spaces 13 in the shape of four stars branches; the contour centers 12 are located at vertices of squares having a side length equal to contour diameter.
  • zone A covers a succession of empty spaces 13, and the central line 7 of perforations pass appreciably in the middle of these empty spaces.
  • zone (s) A covers (s) a succession of empty spaces 13.
  • zone A is provided at mid-width of the film, the number of objects in a row orthogonal to direction E is an even number.
  • Opening film 3 to remove one or more several cans are made in the same way next.
  • the band K has a width substantially double of the interval f between two perforations 11a or 11b and, in practice, between 10 and 60 mm.
  • Heat shrink film 3 undergoes stresses thermal during shrinkage or shrinkage.
  • the distance between the perforations 8, 11a, 11b as well as their diameter are chosen according to mechanical characteristics of film 3, in order to avoid formation of holes in the film which would join under the effect of thermal stresses, while allowing weakening of the area considered A which will allow prime the opening tabs J.
  • Printing can be done on the area attenuation A, in particular on the lines of perforations in order to materialize them and make them more visible. This print will give indications on the movements to be carried out to initiate and propagate tearing of the film 3 from the perforations 8, 11a and 11b.
  • the solution of the invention is of great ease of implementation allowing the adaptation of the pre-cut at any stage of production / processing / use of the product.
  • This solution is complementary to the properties of a film 3 to good transverse tear.
  • the invention ensures continuous production of the weakening zone A while preserving the integrity of the heat-shrunk burden relative to a discontinuous process with "cookie cutter” type imprint.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Wrappers (AREA)
  • Laminated Bodies (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Claims (14)

  1. Pack von Gegenständen, wie Konservendosen, Kanister, Flaschen, usw., die mit einer Kunststoffolie (3) verpackt sind, welche eine bevorzugte Aufreißrichtung (D) aufweist, wobei mehrere Gegenstände (2) nebeneinander in einer oder mehreren übereinanderliegenden Lagen angeordnet sind, wobei die Folie gemäß einer Wickelrichtung um die von ihr umspannten Gegenstände gefaltet wird, wobei Öffnungsmittel auf der Folie vorgesehen sind, um ihr Aufreißen zu erleichtern, dadurch gekennzeichnet, daß die Öffnungsmittel der Kunststoffolie (3) eine durchgehende Schwachzone (A) aufweisen, die quer zur bevorzugten Aufreißrichtung (D) ausgerichtet ist und einen das Pack umgebenden Gürtel (6) bildet, wobei diese Schwachzone (A) eine mechanische Festigkeit aufweist, die stark genug, um die auf die Folie zum Umspannen der Gegenstände ausgeübten Zugkräfte auszuhalten, aber schwach genug ist, um eine Öffnung der Folie ohne Werkzeug an einem beliebigen Punkt der Zone durch Anreißen einer Zunge und Zug an der Zunge gemäß einer Richtung quer zur Richtung der Schwachzone zu erlauben.
  2. Pack von Gegenständen nach Anspruch 1, dadurch gekennzeichnet, daß die Schwachzone (A) senkrecht zur bevorzugten Aufreißrichtung (D) liegt.
  3. Pack von Gegenständen nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die durchgehende Schwachzone (A) mindestens eine Reihe (7) von Perforationen (8) aufweist.
  4. Pack von Gegenständen nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die durchgehende Schwachzone (A) eine zentrale Reihe (7) von Perforationen aufweist, die von zwei parallelen Reihen (9, 10) von Perforationen umgeben ist, die einen Abstand zur zentralen Reihe aufweisen und bei denen der Abstand (f) zwischen zwei aufeinanderfolgenden Perforationen größer ist als der Abstand (g) zwischen zwei aufeinanderfolgenden Perforationen (8) der zentralen Reihe.
  5. Pack von Gegenständen nach Anspruch 4, dadurch gekennzeichnet, daß der Abstand (f) zwischen zwei aufeinanderfolgenden Perforationen (11a, 11b) der äußeren Reihen (9, 10) doppelt so groß ist wie der Abstand (g) zwischen zwei Perforationen der zentralen Reihe.
  6. Pack von Gegenständen nach Anspruch 5, dadurch gekennzeichnet, daß die Perforationen (11a, 11b) der beiden äußeren Reihen (9, 10) mit einer Perforation (8) der zentralen Reihe in einer Richtung orthogonal zur zentralen Reihe fluchten.
  7. Pack von Gegenständen nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Verpackungsfolie (3) aus Kunststoff eine Zweischicht-Folie ist, deren bevorzugte Aufreißrichtung (D) senkrecht zur Extrudierrichtung (E) liegt.
  8. Pack von Gegenständen nach Anspruch 7, dadurch gekennzeichnet, daß die Folie eine coextrudierte Folie aus Polyethylen und einem Ionomer ist, die insbesondere aus mindestens einer Schicht Polyolefin und mindestens einer Schicht eines ionischen Copolymers besteht.
  9. Pack von Gegenständen nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, daß die Reihen von Perforationen einen Abstand von 5 bis 30 mm über eine Breite von 30 bis 100 mm aufweisen.
  10. Pack von Gegenständen nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Schwachzone (A) der Folie eine Folge von Leerräumen (13) zwischen den Gegenständen (2) überdeckt.
  11. Pack von Gegenständen nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Schwachzone (A) der Folie in Höhe der halben Breite der Folie (3) vorgesehen ist.
  12. Kunststoffolie zum Gebindeverpacken von Gegenständen eines Packs gemäß einem der vorhergehenden Ansprüche, die eine bevorzugte Aufreißrichtung (D) aufweist, dadurch gekennzeichnet, daß sie eine durchgehende Schwachzone (A) aufweist, die quer, insbesondere senkrecht, zur bevorzugten Aufreißrichtung (D) ausgerichtet ist und das Aufreißen durch Anreißen einer Zunge und Zug auf die Zunge in einer Richtung quer zur Richtung der Schwachzone ermöglicht.
  13. Kunststoffolie nach Anspruch 12, dadurch gekennzeichnet, daß die durchgehende Schwachzone (A) mindestens eine Reihe (7) von mit regelmäßigem Abstand angeordneten Perforationen, und insbesondere drei Reihen von Perforationen (7, 9, 10) aufweist, d.h. eine zentrale Reihe (7), in der die Perforationen (8) einen geringeren Abstand aufweisen als in den beiden äußeren Reihen (9, 10), die parallel zu und beidseitig der zentralen Reihe angeordnet sind.
  14. Verfahren zur Herstellung einer Kunststoffolie nach Anspruch 13, dadurch gekennzeichnet, daß die Perforationen (8, 11a, 11b) beim Abwickeln oder Aufwickeln der Folie (3) vor dem Verpacken über ihre ganze Länge hergestellt werden, insbesondere beim Extrudieren, beim Umwickeln, beim Prägen oder auf der Bündelmaschine.
EP98401739A 1997-07-24 1998-07-09 Mit einer Kunststoffolie umhüllte Gegenstandsverpackung, sowie eine Kunststoffolie für eine solche Verpackung und Verfahren zur Herstellung einer solchen Kunststoffolie Expired - Lifetime EP0893361B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9709404A FR2766465B1 (fr) 1997-07-24 1997-07-24 Pack d'objets emballes avec un film plastique, film plastique pour l'emballage d'un pack, et procede de fabrication du film plastique
FR9709404 1997-07-24

Publications (2)

Publication Number Publication Date
EP0893361A1 EP0893361A1 (de) 1999-01-27
EP0893361B1 true EP0893361B1 (de) 2003-05-02

Family

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EP98401739A Expired - Lifetime EP0893361B1 (de) 1997-07-24 1998-07-09 Mit einer Kunststoffolie umhüllte Gegenstandsverpackung, sowie eine Kunststoffolie für eine solche Verpackung und Verfahren zur Herstellung einer solchen Kunststoffolie

Country Status (14)

Country Link
US (1) US6105776A (de)
EP (1) EP0893361B1 (de)
JP (1) JPH1191821A (de)
KR (1) KR100528308B1 (de)
AT (1) ATE238951T1 (de)
CA (1) CA2241332C (de)
DE (1) DE69813959T2 (de)
DK (1) DK0893361T3 (de)
ES (1) ES2197433T3 (de)
FR (1) FR2766465B1 (de)
IL (1) IL125239A (de)
NO (1) NO319314B1 (de)
PT (1) PT893361E (de)
ZA (1) ZA986589B (de)

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US5067612A (en) * 1989-01-26 1991-11-26 Honshu Sangyou Kabushiki Kaisha Shrink film package having perforated folded strip
JP2721703B2 (ja) * 1989-06-20 1998-03-04 サンデン株式会社 ティグ溶接トーチ
US4971197A (en) * 1989-12-06 1990-11-20 Eveready Battery Company, Inc. Battery package
JP2560666Y2 (ja) * 1991-06-24 1998-01-26 大倉工業株式会社 開封機能を持った巻き付け熱収縮包装体
NO302409B1 (no) * 1991-10-11 1998-03-02 Sodap Lett rivbar pakning
NO923913L (no) * 1991-10-11 1993-04-13 Sodap Termoplastisk krympefilm
FR2694538B1 (fr) * 1992-08-10 1994-12-23 Matieres Plastiques Ste Lorrai Procédé et dispositif d'emballage d'objets à ouverture rapide.
FR2766465B1 (fr) * 1997-07-24 1999-09-03 Soplaril Sa Pack d'objets emballes avec un film plastique, film plastique pour l'emballage d'un pack, et procede de fabrication du film plastique

Also Published As

Publication number Publication date
ATE238951T1 (de) 2003-05-15
ZA986589B (en) 2000-05-09
CA2241332A1 (fr) 1999-01-24
KR19990014169A (ko) 1999-02-25
DK0893361T3 (da) 2003-08-25
EP0893361A1 (de) 1999-01-27
DE69813959D1 (de) 2003-06-05
PT893361E (pt) 2003-08-29
IL125239A0 (en) 1999-03-12
DE69813959T2 (de) 2004-02-26
US6105776A (en) 2000-08-22
ES2197433T3 (es) 2004-01-01
JPH1191821A (ja) 1999-04-06
FR2766465B1 (fr) 1999-09-03
KR100528308B1 (ko) 2006-01-27
CA2241332C (fr) 2006-12-05
NO983365L (no) 1999-01-25
IL125239A (en) 2001-03-19
NO319314B1 (no) 2005-07-11
FR2766465A1 (fr) 1999-01-29
NO983365D0 (no) 1998-07-21

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