WO1990009329A1 - Couvercle pour recipient - Google Patents

Couvercle pour recipient Download PDF

Info

Publication number
WO1990009329A1
WO1990009329A1 PCT/DK1990/000033 DK9000033W WO9009329A1 WO 1990009329 A1 WO1990009329 A1 WO 1990009329A1 DK 9000033 W DK9000033 W DK 9000033W WO 9009329 A1 WO9009329 A1 WO 9009329A1
Authority
WO
WIPO (PCT)
Prior art keywords
lid
container
flange
encircling
area
Prior art date
Application number
PCT/DK1990/000033
Other languages
English (en)
Inventor
Carsten Lund
Original Assignee
Panther Plast A/S
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 Panther Plast A/S filed Critical Panther Plast A/S
Priority to AT90903322T priority Critical patent/ATE96752T1/de
Priority to DE69004420T priority patent/DE69004420T2/de
Publication of WO1990009329A1 publication Critical patent/WO1990009329A1/fr

Links

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
    • B65D43/00—Lids or covers for rigid or semi-rigid containers
    • B65D43/02—Removable lids or covers
    • B65D43/0202—Removable lids or covers without integral tamper element
    • B65D43/0204—Removable lids or covers without integral tamper element secured by snapping over beads or projections
    • B65D43/0212—Removable lids or covers without integral tamper element secured by snapping over beads or projections only on the outside, or a part turned to the outside, of the mouth
    • 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
    • B65D45/00—Clamping or other pressure-applying devices for securing or retaining closure members
    • B65D45/02—Clamping or other pressure-applying devices for securing or retaining closure members for applying axial pressure to engage closure with sealing surface
    • B65D45/30—Annular members, e.g. with snap-over action or screw-threaded
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00018—Overall construction of the lid
    • B65D2543/00259—Materials used
    • B65D2543/00296—Plastic
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
    • B65D2543/0049—Contact between the container and the lid on the inside or the outside of the container on the inside, or a part turned to the inside of the mouth of the container
    • B65D2543/00509—Cup
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
    • B65D2543/00537—Contact between the container and the lid on the inside or the outside of the container on the outside, or a part turned to the outside of the mouth of the container
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
    • B65D2543/00555—Contact between the container and the lid on the inside or the outside of the container on both the inside and the outside
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00592—Snapping means
    • B65D2543/00601—Snapping means on the container
    • B65D2543/00611—Profiles
    • B65D2543/00629—Massive bead
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00592—Snapping means
    • B65D2543/00601—Snapping means on the container
    • B65D2543/00675—Periphery concerned
    • B65D2543/00685—Totality
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00592—Snapping means
    • B65D2543/00712—Snapping means on the lid
    • B65D2543/00722—Profiles
    • B65D2543/0074—Massive bead
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00592—Snapping means
    • B65D2543/00712—Snapping means on the lid
    • B65D2543/00787—Periphery concerned
    • B65D2543/00796—Totality
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00824—Means for facilitating removing of the closure
    • B65D2543/00833—Integral tabs, tongues, handles or similar
    • B65D2543/00842—Integral tabs, tongues, handles or similar outside of the lid
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00953—Sealing means
    • B65D2543/0099—Integral supplemental sealing lips

Definitions

  • the invention relates to a lid for a container of the kind indicated in the preamble of claim 1.
  • Plastic lids of this kind are used for closing containers, preferably plastic containers, which on the outside below the rim have a wholly or partly encircling flange for securing i:he lid.
  • lids normally have to fit closely and it is demanded that it should be possible to remove the lid without recourse to tools. Furthermore the lid has to be designed in such a way that it may be put back in place in ord ⁇ r for the container to be reclosed. It must be possible to open and reclose the con ⁇ tainer a certain number of times until the container is empty, without reduction of the strength and tightness.
  • the object of the invention is to indicate a container, lid of the above mentioned kind in which the desired qualities with regard to tightness and reclosability are achieved in a new way without risk of undesired by-effects.
  • the container lid according to the invention as indicated in the characterizing part of claim 1.
  • the opening and closing is effected by a ⁇ movement in a vertical direction, i. e. in the axial direction of the container so that the edge of the flange will not be stretched resulting in a very great annular tension, as is often the case in the conventional constructions.
  • the special advantages of the invention are remarkable, as the stretching of the outer edge of the lid is avoided immediately before the flange is to engage with the locking rim of the container.
  • the container lid according to the invention is preferably designed as indicated in the characterizing part of claim 2.
  • an embodiment is achieved which is easy to produce and in which the lid flange functions as a kind of double hinge. It is generally known to produce easily bendable areas by narrowing down the thickness of material in such a way that a weakened area is created, f. inst. if the lid is injection molded from polypropylene or similar plastic materials.
  • the easily bendable ares or parts can be made or produced in other ways, f. inst. by reducing the stiffness of the material by perfora ⁇ tions or similar means, but they are preferably produced by reducing the thickness of the material.
  • the container lid according to the invention as indicated in the characterizing part of claim 7, it is ren ⁇ dered possible to remove the lid by a comparatively small movement of the encircling, downwards protruding flange of the lid and with a correspondingly small bending of the weakened areas. Besides, mounting and remounting of the lid on the con ⁇ tainer is possible without any substantial deformation of the lid, so that the desired complete tightness is achieved imme ⁇ diately.
  • the outer part of the flange of the lid will rock a little outwards at the outer weakened area, i. e. approximately at the middle of the lid flange or the jacket, and this further assists in facilitating the removal of the lid.
  • The. locking bead of the lid only has to be free of the outer edge of the container flange for the lid to be remo ⁇ ved freely.
  • the container lid according to the invention is designed as indicated in the characterizing part of claim 9, i£ is achie ⁇ ved that one of the weakened areas is situated exactly where the moment is the greatest during the removal of the lid, whereby less force has to be applied for the removal of the lid than would be the case if the weakened area was placed further out on the flange of the lid.
  • the container lid according to the invention is designed as indicated in the characterizing part of claim 10, the encirc ⁇ ling upper edge of the lid will also be moved a little upwards during the removal of the lid so that the necessary movement of the flange of the lid will be distributed to all the parts. Hereby the removal of the lid is facilitated and simplified.
  • the invention is explained further in relation to a preferred embodiment shown in the drawing, in which
  • fig. 1 shows the upper part of a container with a lid accor ⁇ ding to the invention, partly as a side view and partly as a sectional view,
  • fig. 2 is a radial part section through the edge of the con- tainer and the lid on a larger scale
  • fig. 3 is a radial part section through the edge of the con ⁇ tainer and the lid according to a second embodiment of the invention.
  • fig. 4 shows the same as fig. 3, but with the lid free of the container.
  • a container lid 1 according to the invention is put on a plastic container 2 which has en encircling, annular flange 5, which is engaging the flange of the lid which in the embodiment shown comprises two encircling flange parts 8 and 9, the lower flange part having an internal encircling locking bead 10 which may be snapped under the lower edge of the con- tainer flange.
  • fig. 2 shows a radial part section through the edge on a larger scale.
  • Fig. 2 shows in a full line the container lid on the container 2 and in a dot-dash-dot line the container lid when the flange is free of the container.
  • the container 2 comprises a comparatively sharp sealing edge 3 at the mouth of the container, and an annular flange 5 below this which is cast integral with the container and which flange is terminated downwards by a locking edge 6.
  • a suitable stiffness to the flange 5 evenly spaced radial ribs 14 are cast integral with the container.
  • a container lid 1 of elastically deformable plastic has an en ⁇ circling flange part which comprises an upper edge part 7 and in continuation hereof two flange parts, i. e. an upper flange part 8 and a lower flange part 9, connected by narrowed down parts or weakened lines 11, 12.
  • the lid is injection molded as an integral unit.
  • the edge area 6 is provided with a downwards turned, axial guiding rib 4 which is contacting the outer surface of the container, and which together with the part of the container lid 1, which is contacting the inner surface of the container, forms the closure and seal between the lid and the container.
  • the upper narrowed down part 11 is formed from the inside, so that the upwards turned sealing edge area has an even, smooth surface, and the lower narrowed down part 12 is formed from the outside as shown in the drawing.
  • the lower flange part 9 ends in a periferal terminal edge 13 which is rounded and, as shown, turned slightly outwards so that it forms a gripping edge which is easy to grip with the fingers when the lid has to be removed.
  • the area 15 may be used during the removal of the lid, as f. inst. the thumb is placed against the area 15 and the rest of the fingers are gripping under the edge 13 of the lid.
  • the edge of the lid is then lifted so that the locking bead 10 is freed from the flange edge 6 and the lid is slipped from the position, which is shown in a full line, to the position, which is shown in a dot-and-dash line.
  • This parallel displacement of the flange of the lid results in that only the upper flange part 8 and the two weakened lines 11 and 12 are deformed.
  • the lower flange part 9 is by and large not deformed, neither when opening the lid, nor when closing it. Stretching of the edge area 13 during the closing proces is hereby avoided, and the annular tension built into the flange part 9 is preserved fully so that the locking bead 10 will engage the locking edge 6 without problems.
  • Figs. 3 and 4 show another enbodiment of the container lid according to the invention.
  • the flange of the lid is in this enmbodiment divided into three encircling areas. I. e. in one substantially radial area 8 and two areas 9 and 16 which are substantially axial in relation to the container 2.
  • the three areas are hinged together and hinged to the edge part 7 of the lid proper 1 by means of intergral hinges or encircling weakened areas, 11', 17, 12, of which the weakened areas closest to the lid proper, i. e. 11' and 17, are formed on the surface of the flange of the lid which is turned inwards towards the container, and the outermost weakened area 12 is formed on the outwards turned surface of the flange of the lid.
  • Fig. 3 shows that the flange of the lid during the removal of the container lid makes a much smaller movement than in the embodiment shown in fig. 2, as the movement is distributed among all three encircling parts. As soon as the bead 10 has been shifted to the upper side of the locking edge 5 the lid may be freely removed.
  • Fig. 4 shows the lid free of the container 2.
  • the lid is mol ⁇ ded in this shape and therefore fig. 4 also shows the lid during its application.
  • the lid is snapped on the container 2 by pressing the upper surface of the lid lightly, as the locking bead 10 without violent deformations or great increa ⁇ ses of the annular tension in the bead 10 is pushed down under the locking edge 6, thereby ensuring full tightness immediate ⁇ ly after the mounting of the lid.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)

Abstract

Le couvercle pour récipient décrit (1), qui est en plastique élastique déformable, comporte un rebord périphérique qui est destiné à se cramponner sur le bord du bec d'un récipient (2), lequel est pourvu d'un rebord périphérique externe (5), de sorte que le rebord du couvercle se cramponne sous tension sur le rebord du récipient. Le rebord du couvercle se compose de deux sections périphériques (8, 9) séparées par des régions pliables.
PCT/DK1990/000033 1989-02-10 1990-02-09 Couvercle pour recipient WO1990009329A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT90903322T ATE96752T1 (de) 1989-02-10 1990-02-09 Behaelterdeckel.
DE69004420T DE69004420T2 (de) 1989-02-10 1990-02-09 Behälterdeckel.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK655/89 1989-02-10
DK65589A DK160701C (da) 1989-02-10 1989-02-10 Beholderlaag

Publications (1)

Publication Number Publication Date
WO1990009329A1 true WO1990009329A1 (fr) 1990-08-23

Family

ID=8096028

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1990/000033 WO1990009329A1 (fr) 1989-02-10 1990-02-09 Couvercle pour recipient

Country Status (5)

Country Link
EP (1) EP0456749B1 (fr)
AU (1) AU5101490A (fr)
DE (1) DE69004420T2 (fr)
DK (1) DK160701C (fr)
WO (1) WO1990009329A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996016875A1 (fr) * 1994-11-25 1996-06-06 Eric Bock Couvercle plastique resistant aux chutes pour conteneur
FR2783241A1 (fr) * 1998-09-15 2000-03-17 Allibert Sa Couvercle a poignee de verrouillage pour la fermeture d'un bac de rangement
WO2006102721A1 (fr) * 2005-03-31 2006-10-05 Innovative Design Co Pty Ltd Capuchon pour recipient avec jupe a zone deformable permettant le pivotement

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1438136A (en) * 1972-10-02 1976-06-03 Stevens P P Container assembly with closure
EP0044112A1 (fr) * 1980-07-16 1982-01-20 Tetra Laval Holdings & Finance SA Dispositif de fermeture pour récipients d'emballage
DK145194B (da) * 1980-11-20 1982-10-04 Superfos As Beholder af elastisk deformerbart plast
DK154549B (da) * 1980-09-19 1988-11-28 Sears Roebuck & Co Et beholder-lukkearrangement til lukning af en beholderaabning.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1438136A (en) * 1972-10-02 1976-06-03 Stevens P P Container assembly with closure
EP0044112A1 (fr) * 1980-07-16 1982-01-20 Tetra Laval Holdings & Finance SA Dispositif de fermeture pour récipients d'emballage
DK154549B (da) * 1980-09-19 1988-11-28 Sears Roebuck & Co Et beholder-lukkearrangement til lukning af en beholderaabning.
DK145194B (da) * 1980-11-20 1982-10-04 Superfos As Beholder af elastisk deformerbart plast

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996016875A1 (fr) * 1994-11-25 1996-06-06 Eric Bock Couvercle plastique resistant aux chutes pour conteneur
FR2783241A1 (fr) * 1998-09-15 2000-03-17 Allibert Sa Couvercle a poignee de verrouillage pour la fermeture d'un bac de rangement
EP0987188A1 (fr) * 1998-09-15 2000-03-22 Allibert Sa. Couvercle à poignée de verrouillage pour la fermeture d'un bac de rangement
WO2006102721A1 (fr) * 2005-03-31 2006-10-05 Innovative Design Co Pty Ltd Capuchon pour recipient avec jupe a zone deformable permettant le pivotement
AU2006200114B2 (en) * 2005-03-31 2009-05-21 Innovative Design Co Pty Ltd Container closure
CN100577529C (zh) * 2005-03-31 2010-01-06 创新设计私人有限公司 侧缘中具有可变形区域以允许转动的容器封口
US8523009B2 (en) 2005-03-31 2013-09-03 Innovative Design Co., Pty Ltd. Container closure with deformable region in skirt to allow pivoting

Also Published As

Publication number Publication date
AU5101490A (en) 1990-09-05
DK160701C (da) 1991-09-23
EP0456749B1 (fr) 1993-11-03
DE69004420D1 (de) 1993-12-09
DK65589D0 (da) 1989-02-10
DE69004420T2 (de) 1994-05-19
DK65589A (da) 1990-08-11
EP0456749A1 (fr) 1991-11-21
DK160701B (da) 1991-04-08

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