EP0448200A1 - Emballage pour boisson et méthode d'emballage d'une boisson contenant un gaz en solution - Google Patents

Emballage pour boisson et méthode d'emballage d'une boisson contenant un gaz en solution Download PDF

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Publication number
EP0448200A1
EP0448200A1 EP91300675A EP91300675A EP0448200A1 EP 0448200 A1 EP0448200 A1 EP 0448200A1 EP 91300675 A EP91300675 A EP 91300675A EP 91300675 A EP91300675 A EP 91300675A EP 0448200 A1 EP0448200 A1 EP 0448200A1
Authority
EP
European Patent Office
Prior art keywords
beverage
insert
chamber
primary
package
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.)
Withdrawn
Application number
EP91300675A
Other languages
German (de)
English (en)
Inventor
Alexander Bruce
Robert Purdham
Richard Paul Harbutt
David Gerald Seguin Macintosh Osborne
Stephen Knowles
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.)
Guinness Brewing Worldwide Ltd
Original Assignee
Guinness Brewing Worldwide Ltd
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 Guinness Brewing Worldwide Ltd filed Critical Guinness Brewing Worldwide Ltd
Publication of EP0448200A1 publication Critical patent/EP0448200A1/fr
Withdrawn legal-status Critical Current

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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
    • B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
    • B65D85/70—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for
    • B65D85/72—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for for edible or potable liquids, semiliquids, or plastic or pasty materials
    • B65D85/73—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for for edible or potable liquids, semiliquids, or plastic or pasty materials with means specially adapted for effervescing the liquids, e.g. for forming bubbles or beer head

Definitions

  • the present invention relates to a beverage package and a method of packaging a beverage containing gas in solution and is particularly concerned with an improvement to the beverage package and method of packaging disclosed in our British Patent No. 2,183,592.
  • a sealed container forming a primary chamber and within which is contained beverage (which may be alcoholic or non-alcoholic) having gas in solution therewith and forming a primary headspace comprising gas at a pressure greater than atmospheric.
  • beverage which may be alcoholic or non-alcoholic
  • a primary headspace comprising gas at a pressure greater than atmospheric.
  • the secondary chamber contains beverage derived from the primary chamber and has a secondary headspace comprising gas at a pressure greater than atmospheric so that the gas pressures within the primary and secondary headspaces are substantially at equilibrium.
  • the secondary chamber of the insert When the sealed container is opened to open the primary headspace to atmospheric pressure, the secondary chamber of the insert is arranged so that the pressure differential caused by the decrease in pressure at the primary headspace causes beverage and/or gas (preferably beverage) in the secondary chamber to be ejected by way of the restricted orifice into the beverage of the primary chamber and said ejection causes gas in the solution to be evolved and form, or assist in the formation of, a head of froth on the beverage.
  • the hollow insert is in the form of a plastics moulded pod which is inserted into the container prior to the container being charged with beverage.
  • the pod is retained in position within the primary chamber, typically on or adjacent to the base of the container, by flexible lugs or tabs on the pod frictionally engaging a side wall of the container. Following such location of the pod, the primary chamber is charged with the beverage containing gas in solution and the container sealed as discussed in our aforementioned Patent.
  • a beverage package comprising a sealed container having a primary chamber containing beverage having gas in solution therewith and forming a primary headspace comprising gas at a pressure greater than atmospheric; an insert located in the primary chamber and having a secondary chamber with a volume less than that of the primary chamber and a restricted orifice through which the secondary chamber communicates with the beverage in the primary chamber, said secondary chamber comprising gas at a pressure greater than atmospheric so that the pressures within the primary and secondary chambers are substantially at equilibrium, said package being openable to open the primary headspace to atmospheric pressure and the secondary chamber being arranged so that on said opening the pressure differential caused by the decrease in pressure at the primary headspace causes at least one of beverage or gas (preferably beverage) in the secondary chamber to be ejected by way of the restricted orifice into the beverage of the primary chamber and said ejection causes gas in the solution to be evolved and form, or assist in the formation of, a head of froth on the beverage, and wherein said insert is retained magnetically at a predetermined location in the
  • a method of packaging a beverage having gas in solution therewith which comprises providing a container with a primary chamber; locating in said primary chamber a hollow insert having a secondary chamber the volume of which is less than that of the primary chamber and a restricted orifice through which the secondary chamber communicates with the primary chamber, and retaining said insert magnetically at a predetermined location in the primary chamber; charging and sealing the primary chamber with the beverage containing gas in solution to form a primary headspace in the primary chamber, and charging the secondary chamber with gas under pressure whereby the pressures in both the primary and secondary chambers are at equilibrium and gaseous pressures in both the primary and secondary chambers are at a pressure greater than atmospheric.
  • the secondary chamber contains beverage derived by way of the restricted orifice from the primary chamber to form a secondary headspace in the secondary chamber with the gaseous pressures in the primary and secondary chambers in equilibrium.
  • the hollow insert in the beverage package of the present invention can serve exactly the same purpose in forming or assisting in the formation of a head of froth on the beverage when the package is opened as the hollow insert disclosed in our British Patent No. 2,183,592 and as such that purpose is not discussed herein in detail.
  • the magnetic retention of the hollow insert as proposed by the present invention can provide considerable advantages over the frictionally retained insert of our prior proposal.
  • the insert may be simply dropped into the primary chamber through an open top of the container so that the insert falls under gravity and is magnetically attracted to be retained, usually on the base of the primary chamber in the container.
  • This alleviates the requirement for equipment which loads the inserts into the containers from entering those containers and thereby may permit a container filling line to run at a higher speed.
  • the magnetic attraction by which the inserts are retained in position can be selected to ensure that the inserts will not break free from their desired location except under severe adverse conditions which are unlikely to be encountered during normal handling or transport of the beverage package.
  • the insert will usually be located and magnetically retained in the primary chamber on the base of the container but it will be realised that alternative locations are possible, for example on a side wall of the container.
  • the insert carries a permanent magnet so that it is retained at its desired location by attraction to a compatible metallic material on or in the container.
  • This metallic material may be an integral part of the container, for example in the base or a side wall thereof, or may be secured to the container for the purpose of retaining the insert.
  • the hollow insert may be in the form of a plastics moulded pod and desirably the magnet is encapsulated within the plastics of the pod to be sealed from the beverage in the package.
  • the container may be of any appropriate form such as a glass or plastics bottle, a can or a carton all of which are well known in the art.
  • the invention was however primarily developed for use with glass bottle containers. The recycling of glass is to be encouraged and is now conventional practice in many countries. During such recycling glass bottles are crushed and metal parts are magnetically removed from the crushed material; with the preferred arrangement mentioned above where the hollow plastics insert carries a permanent magnet, such magnet and insert may readily be removed magnetically from a crushed glass container.
  • the container carries a permanent magnet to which a compatible metallic material on or in the hollow insert is attracted to retain the insert at its desired location.
  • a permanent magnet may be secured to or otherwise retained on the underside of the base of the container.
  • This proposal may be less desirable than the insert carrying the magnet because during handling of the containers preparatory to them receiving the inserts in a filling line, it is possible for magnets on the containers to pick up stray metallic elements and this could require additional cleaning of the containers.
  • magnets carried by the containers could additionally serve for automatically controlling movement, handling or stocktaking of the containers.
  • the magnet (or magnetic material) is located on the container it can be provided with a protective cover which may serve to retain it or the magnetic material on the container. It is also possible for a permanent magnet (or magnetic material) to be encapsulated in the material of the container during the moulding thereof.
  • the hollow insert can be retained in the container by magnetic attraction between a magnet carried by the insert and a magnet carried by the container.
  • the beverage package shown in Figure 1 comprises a conventional wide mouthed glass bottle 1 having a domed base 2 extending upwardly from which is a cylindrical side wall 3 with a neck 4 having an open top 4A and provided with an external screw thread 5 to which is to be fitted and sealed a screw closure cap indicated at 6.
  • the base 2 provides an externally concave surface 7 to which is adhesively secured a ferro-metallic strip or foil 8.
  • the bottle 1 forms a primary chamber 9 and is conveyed in an upstanding condition along a beverage filling line during which, and prior to being charged with beverage, a hollow insert in the form of a plastics pod 10 is deposited into the primary chamber.
  • the pod 10 is dimensioned to pass through the open top and neck 4 of the bottle and is deposited in the primary chamber simply by being dropped through the bottle mouth so that it falls directly (or substantially so) onto the convex surface 11 presented by the interior of the domed base 2.
  • the hollow pod 10 is conveniently profiled as a cylindrical-disc shape with a bottom wall 12, a cylindrical side wall 13 and a top wall 14. Encapsulated within the plastics of the bottom wall 12 is a small permanent magnet 15. Typically, the pod 10 will be formed from two complementary injection moulded plastics shells which are spin welded or otherwise secured together along a split line indicated at 16 to form a secondary chamber 17. The magnet 15 is encapsulated within the plastics of the shell having the bottom wall 12 during the moulding thereof. Formed within the bottom wall 12 (either simultaneously with or subsequent to the moulding thereof) is a restricted aperture 18 which communicates between the primary chamber 9 and the secondary chamber 17.
  • the magnet 15 is attracted to the metallic strip 8 and this attraction serves to centralise the pod on the base 2 and to retain the pod firmly in abutment with the base 2. It will be appreciated that the magnet 15 will be selected so that its attraction to the strip 8 will firmly retain the pod in position at its desired location on the base 2 throughout the handling to which the bottle and package is likely to be subjected during subsequent processing, transport and storage.
  • the bottle With the pod 10 deposited in the primary chamber 9, the bottle is conveyed to a filling station where it is charged with appropriate beverage 19 containing gas in solution and thereafter to a sealing station where the screw cap 6 is fitted.
  • the pressure in the headspaces 20 and 21 is greater than atmospheric and upon removal of the cap 6 for consumption or dispensing of the beverage 19, the primary headspace 20 is opened to atmosphere and the pressure differential created by gas in the secondary headspace 21 ejects beverage from the secondary chamber 17 by way of the restricted orifice 18 and into beverage in the primary chamber 9.
  • the so ejected beverage is subjected to cavitation causing gas in solution to be liberated therefrom - this "seeds" the beverage in the primary chamber causing further gas in solution to be liberated and form a head of froth on the beverage in an identical manner to that discussed in our aforementioned British Patent.
  • the pod 10 is shown with a simple profile for convenience of description.
  • the profile will differ, for example its bottom wall 12 may be shaped to present a substantially complementary fit to the base 7 of the bottle; its profile may be shaped to ensure that, irrespective of the orientation of the bottle when charged with beverage and sealed, a secondary headspace will always be maintained within the secondary chamber (with this in mind it is also possible that the position of the restricted orifice 18 will differ from that shown).
  • the bottom portion of a bottle package is shown comprising a plastics bottle 1A having a substantially hemispherical base 2A.
  • the hollow plastics pod 10 Located within the primary chamber 9 of the plastics bottle is the hollow plastics pod 10 which is conveniently shown with a different profile to seat in substantially complementary manner on the base 2A but serves the same purpose as the pod in the Figure 1 embodiment.
  • a permanent magnet is omitted from the pod 10 in Figure 2 but encapsulated within the plastics of the bottom wall of the pod is a ferro-metallic bar, strip or foil 8A. The bar 8A and thereby the pod is attracted to and retained on the bottom 2A of the plastics bottle by a permanent magnet 25 secured to the underside of the base 2A.
  • the magnet 25 may be adhesively secured to the base 2A or retained thereon by a plastics cover or base cup 26 which may form a stand for the bottle 1A.
  • the base cup 26 has a circular rim 27 secured to the cylindrical wall of the bottle 1A, conveniently by welding, adhesive or mechanical snap engagement.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)
  • Packging For Living Organisms, Food Or Medicinal Products That Are Sensitive To Environmental Conditiond (AREA)
  • Filling Of Jars Or Cans And Processes For Cleaning And Sealing Jars (AREA)
  • Non-Alcoholic Beverages (AREA)
  • Packages (AREA)
  • Vacuum Packaging (AREA)
EP91300675A 1990-02-15 1991-01-28 Emballage pour boisson et méthode d'emballage d'une boisson contenant un gaz en solution Withdrawn EP0448200A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9003440 1990-02-15
GB9003440A GB2240960A (en) 1990-02-15 1990-02-15 Carbonated beverage container

Publications (1)

Publication Number Publication Date
EP0448200A1 true EP0448200A1 (fr) 1991-09-25

Family

ID=10671057

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91300675A Withdrawn EP0448200A1 (fr) 1990-02-15 1991-01-28 Emballage pour boisson et méthode d'emballage d'une boisson contenant un gaz en solution

Country Status (6)

Country Link
EP (1) EP0448200A1 (fr)
JP (1) JPH0542976A (fr)
AU (1) AU7017191A (fr)
CA (1) CA2036282A1 (fr)
GB (1) GB2240960A (fr)
IE (1) IE910432A1 (fr)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0518522A2 (fr) * 1991-06-12 1992-12-16 Guinness Brewing Worldwide Limited Récipient pour boisson comprenant des moyens pour faire mousser ladite boisson, et procédé pour préparer un tel récipient
WO1994004433A1 (fr) * 1992-08-24 1994-03-03 Alcan International Limited Stockage de fluide
WO1994014678A1 (fr) * 1992-12-23 1994-07-07 Pa Consulting Services Limited Ameliorations concernant des boissons en boites ou en bouteilles et conditionnement associe
WO1995003982A2 (fr) * 1993-07-30 1995-02-09 Courage Limited Dispositif pour la production de mousse sur des boissons
WO1995003983A1 (fr) * 1993-07-30 1995-02-09 Courage Limited Dispositif pour l'amelioration d'une boisson
WO1995004689A1 (fr) * 1993-08-06 1995-02-16 Smithkline Beecham Plc Recipient pour boisson
WO1995004688A2 (fr) * 1993-08-05 1995-02-16 Courage Limited Ameliorations concernant la maniere de produire un volume de tete au-dessus de boissons
WO1995008493A1 (fr) * 1993-09-18 1995-03-30 Bass Plc Recipient pour boissons gazeuses et procede de fabrication
GB2289257A (en) * 1992-12-23 1995-11-15 Courage Ltd Improvements in and relating to packaged beverages and packaging therefor
GB2295599A (en) * 1993-07-30 1996-06-05 Scottish & Newcastle Plc Beverage enhancer
GB2295600A (en) * 1993-07-30 1996-06-05 Scottish & Newcastle Plc Device for producing a head on a beverage
EP0747298A1 (fr) * 1992-12-23 1996-12-11 Scottish & Newcastle plc Améliorations concernant des boissons en boîtes ou en bouteilles et conditionnement associé
ES2103174A1 (es) * 1994-04-07 1997-08-16 Gomez Castro Antonio Mejoras introducidas en la fabricacion de envases y otros productos recuperables o reciclables tras su eliminacion como residuos urbanos.
DE19638182A1 (de) * 1996-09-11 1998-03-12 Schmalbach Lubeca Behälter für ein unter Gasdruck stehendes Getränk
DE29810354U1 (de) * 1998-06-12 1999-10-21 Rpc Bramlage Gmbh Wirkstoffbehälter
WO2004054896A1 (fr) 2002-12-16 2004-07-01 Ball Packaging Europe Gmbh Piece d'insertion pour un recipient a liquide sous pression
CN102774571A (zh) * 2012-07-26 2012-11-14 王宝根 内置速溶粉的饮料吸嘴自立袋
US8469221B2 (en) 2004-07-09 2013-06-25 Ball Packaging Europe Gmbh Floating multi-chambered insert for liquid containers
CN105270769A (zh) * 2015-09-25 2016-01-27 中山市韩加电器科技有限公司 一种罐装啤酒起泡器

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IE70665B1 (en) * 1989-11-22 1996-12-11 Whitbread & Co Plc Carbonated beverage container
GB2280415B (en) * 1993-07-27 1997-01-29 Bass Plc Improvements in and relating to packaged beverages
US5827555A (en) * 1993-09-28 1998-10-27 American National Can Company Foaming insert for a beverage container
DK0719230T3 (da) * 1993-09-28 1998-05-04 American National Can Co Skumdannende indsats til en drikkebeholder
US6390319B1 (en) * 1998-11-30 2002-05-21 Sun Yu Beverage magnetizing container
KR101678897B1 (ko) * 2014-12-05 2016-11-23 김기완 음료 용기 및 이에 결합되는 마개
DE102021112261B4 (de) * 2021-05-11 2023-03-09 Sven Skupski Zugabe einer Substanz zu einer Flüssigkeit
SE2250277A1 (en) * 2022-03-01 2023-09-02 Borgert Torbjoern Method of producing attachable containers and containers so produced

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1280046A (fr) * 1960-11-16 1961-12-29 Robert & Carriere Lab Perfectionnements apportés aux récipients mélangeurs
EP0227213B1 (fr) * 1985-11-29 1990-06-13 ARTHUR GUINNESS SON & COMPANY (DUBLIN) LIMITED Emballage de boisson et procédé pour emballer une boisson contenant du gaz en solution

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2211813B (en) * 1987-10-29 1992-05-06 Price E J Drinks container

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1280046A (fr) * 1960-11-16 1961-12-29 Robert & Carriere Lab Perfectionnements apportés aux récipients mélangeurs
EP0227213B1 (fr) * 1985-11-29 1990-06-13 ARTHUR GUINNESS SON & COMPANY (DUBLIN) LIMITED Emballage de boisson et procédé pour emballer une boisson contenant du gaz en solution

Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0518522A2 (fr) * 1991-06-12 1992-12-16 Guinness Brewing Worldwide Limited Récipient pour boisson comprenant des moyens pour faire mousser ladite boisson, et procédé pour préparer un tel récipient
EP0518522A3 (en) * 1991-06-12 1993-04-28 Guinness Brewing Worldwide Limited A beverage container with means for frothing the beverage and a method of forming such a container
WO1994004433A1 (fr) * 1992-08-24 1994-03-03 Alcan International Limited Stockage de fluide
US5855292A (en) * 1992-08-24 1999-01-05 Alcan International Limited Fluid storage
US5645188A (en) * 1992-08-24 1997-07-08 Alcan International Limited Fluid container and capsule therefor
GB2284403B (en) * 1992-08-24 1996-09-25 Alcan Int Ltd Fluid storage
GB2284403A (en) * 1992-08-24 1995-06-07 Alcan Int Ltd Fluid storage
EP0747298A1 (fr) * 1992-12-23 1996-12-11 Scottish & Newcastle plc Améliorations concernant des boissons en boîtes ou en bouteilles et conditionnement associé
GB2289257A (en) * 1992-12-23 1995-11-15 Courage Ltd Improvements in and relating to packaged beverages and packaging therefor
US5660867A (en) * 1992-12-23 1997-08-26 Courage Limited Packaged beverages and packaging therefor
WO1994014678A1 (fr) * 1992-12-23 1994-07-07 Pa Consulting Services Limited Ameliorations concernant des boissons en boites ou en bouteilles et conditionnement associe
GB2289257B (en) * 1992-12-23 1996-11-06 Courage Ltd Beverage package with device for frothing the beverage
WO1995003983A1 (fr) * 1993-07-30 1995-02-09 Courage Limited Dispositif pour l'amelioration d'une boisson
GB2295599A (en) * 1993-07-30 1996-06-05 Scottish & Newcastle Plc Beverage enhancer
GB2295600A (en) * 1993-07-30 1996-06-05 Scottish & Newcastle Plc Device for producing a head on a beverage
US5714186A (en) * 1993-07-30 1998-02-03 Scottish & Newcastle Beverage enhancer
GB2295600B (en) * 1993-07-30 1997-02-05 Scottish & Newcastle Plc Device for producing a head on a beverage
GB2295599B (en) * 1993-07-30 1997-03-26 Scottish & Newcastle Plc Beverage enhancer
WO1995003982A2 (fr) * 1993-07-30 1995-02-09 Courage Limited Dispositif pour la production de mousse sur des boissons
WO1995003982A3 (fr) * 1993-07-30 1995-03-30 Pa Consulting Services Dispositif pour la production de mousse sur des boissons
GB2294252A (en) * 1993-08-05 1996-04-24 Scottish & Newcastle Plc Device for producing a head on a beverage
WO1995004688A2 (fr) * 1993-08-05 1995-02-16 Courage Limited Ameliorations concernant la maniere de produire un volume de tete au-dessus de boissons
WO1995004688A3 (fr) * 1993-08-05 1995-04-06 Pa Consulting Services Ameliorations concernant la maniere de produire un volume de tete au-dessus de boissons
WO1995004689A1 (fr) * 1993-08-06 1995-02-16 Smithkline Beecham Plc Recipient pour boisson
WO1995008493A1 (fr) * 1993-09-18 1995-03-30 Bass Plc Recipient pour boissons gazeuses et procede de fabrication
US5683732A (en) * 1993-09-18 1997-11-04 Bass Plc Carbonated beverage container and method of manufacture therefore
ES2103174A1 (es) * 1994-04-07 1997-08-16 Gomez Castro Antonio Mejoras introducidas en la fabricacion de envases y otros productos recuperables o reciclables tras su eliminacion como residuos urbanos.
DE19638182A1 (de) * 1996-09-11 1998-03-12 Schmalbach Lubeca Behälter für ein unter Gasdruck stehendes Getränk
DE29810354U1 (de) * 1998-06-12 1999-10-21 Rpc Bramlage Gmbh Wirkstoffbehälter
WO2004054896A1 (fr) 2002-12-16 2004-07-01 Ball Packaging Europe Gmbh Piece d'insertion pour un recipient a liquide sous pression
DE10258791B4 (de) * 2002-12-16 2007-03-22 Ball Packaging Europe Gmbh Flüssigkeitsbehälter-Einsatz mit zeitdeterminierter Positionierung in einer unter Gasdruck stehenden Flüssigkeit
US8007880B2 (en) 2002-12-16 2011-08-30 Ball Packaging Europe Gmbh Insert for a pressurized container of liquid
US8469221B2 (en) 2004-07-09 2013-06-25 Ball Packaging Europe Gmbh Floating multi-chambered insert for liquid containers
CN102774571A (zh) * 2012-07-26 2012-11-14 王宝根 内置速溶粉的饮料吸嘴自立袋
CN105270769A (zh) * 2015-09-25 2016-01-27 中山市韩加电器科技有限公司 一种罐装啤酒起泡器

Also Published As

Publication number Publication date
GB9003440D0 (en) 1990-04-11
JPH0542976A (ja) 1993-02-23
AU7017191A (en) 1991-08-22
GB2240960A (en) 1991-08-21
CA2036282A1 (fr) 1991-08-16
IE910432A1 (en) 1991-09-11

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