DK163491B - Indretning til at lukke et fyldt papbaeger, som er forsynet med flanger - Google Patents

Indretning til at lukke et fyldt papbaeger, som er forsynet med flanger Download PDF

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Publication number
DK163491B
DK163491B DK400288A DK400288A DK163491B DK 163491 B DK163491 B DK 163491B DK 400288 A DK400288 A DK 400288A DK 400288 A DK400288 A DK 400288A DK 163491 B DK163491 B DK 163491B
Authority
DK
Denmark
Prior art keywords
lid
tray
flanges
sealing
conveyor
Prior art date
Application number
DK400288A
Other languages
English (en)
Other versions
DK400288D0 (da
DK163491C (da
DK400288A (da
Inventor
Kay Wallin
Original Assignee
Sprinter System Ab
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 Sprinter System Ab filed Critical Sprinter System Ab
Publication of DK400288D0 publication Critical patent/DK400288D0/da
Publication of DK400288A publication Critical patent/DK400288A/da
Publication of DK163491B publication Critical patent/DK163491B/da
Application granted granted Critical
Publication of DK163491C publication Critical patent/DK163491C/da

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7858—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus characterised by the feeding movement of the parts to be joined
    • B29C65/7861—In-line machines, i.e. feeding, joining and discharging are in one production line
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1403—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the type of electromagnetic or particle radiation
    • B29C65/1425—Microwave radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1429—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface
    • B29C65/1464—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface making use of several radiators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
    • B29C66/2424—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain
    • B29C66/24243—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain forming a quadrilateral
    • B29C66/24244—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain forming a quadrilateral forming a rectangle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5346—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat
    • B29C66/53461—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat joining substantially flat covers and/or substantially flat bottoms to open ends of container bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • B29C66/83413—Roller, cylinder or drum types cooperating rollers, cylinders or drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B7/00—Closing containers or receptacles after filling
    • B65B7/16—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons
    • B65B7/28—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons by applying separate preformed closures, e.g. lids, covers
    • B65B7/2842—Securing closures on containers
    • B65B7/2878—Securing closures on containers by heat-sealing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7162—Boxes, cartons, cases
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S53/00—Package making
    • Y10S53/02—High frequency electric sealing

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Manufacturing & Machinery (AREA)
  • Closing Of Containers (AREA)
  • Basic Packing Technique (AREA)
  • Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)
  • Saccharide Compounds (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Cell Separators (AREA)

Description

DK 163491B
i
Opfindelsen angår en indretning til med et plant låg at lukke et med flanger forsynet fyldt papbæger, og som består af en lukkemaskine med mindst en gennem denne forløbende inddelingsuafhængig transportør.
5 De lukkemaskiner, som idag anvendes til lukning af sådanne indpakninger, har vist sig at være både dyre i fremstilling som i drift og vedligeholdelse.
Formålet med opfindelsen er at anvise en lukkemaskine, som er billig at fremstille og billig i drift, og hvormed 10 et fyldt papbæger kan lukkes meget rationelt.
Dette opnås, idet indretningen ifølge opfindelsen er ejendommelig ved det i patentkravets kendetegnende del angivne.
Opfindelsen forklares nærmere nedenfor under henvisningen 15 til tegningen, hvor fig. 1 viser skematisk set fra oven en lukkemaskine, fig. 2 skematisk i større målestok set i perspektiv et brudstykke af den i fig. 1 viste maskine fra dennes 20 begyndelse set i bægerets fremføringsretning, og fig. 3. skematisk fra siden set i fremføringsretningen begyndelsen af den i fig. 1 viste maskine, svarende til en del af det i fig. 2 viste brudstykke af maskinen set fra siden.
25 Den i figurerne viste maskine har mindst en gennem denne forløbende transportør 3 til fremføring og samtidig lukning af bægre 1, som er forsynet med flanger, og som på forhånd er fyldt et andet sted. Bægeret 1 frem-
DK 163491 B
2 føres uafhængigt af nogen særlig form for inddeling fremefter på transportøren 3 og når i lukkemaskinens forreste afsnit, set i bægerets 1 fremføringsretning, frem til en position foran et stopgardin 4. Et låg 2, 5 som er tilført fra et over transportøren 3 beliggende magasin 20, ligger allerede op mod dette stopgardin 4 og afventer fremføringen af det bæger 1, der skal forsegles. Låget 2 understøttes i denne position af skinner 9, 10, som strækker sig på langs i transportret-10 ningen, og som er beliggende over såvel transportøren 3 som de på denne liggende bægre 1. Når låget 2 ligger lige oven over et underliggende bæger 1, føres begge fremefter af fremføringsruller 5, 6, 7, 8, som er placeret på hver side af transportøren 3. Låget og bægeret føres 15 derefter fremefter til et første mikrobølgeopvarmnings aggregat 11, som omfatter C-formede skinner 12, 13, der strækker sig på hver sin side af tranportøren 3, og i hvis spalter flangerne og lågkanterne glider og forsegles indbyrdes ved hjælp af mikrobølger. Efter 20 dette mikrobølgeopvarmningsaggregat 11 findes der fast trykningsruller 14, 15, 16, 17 til at sammenpresse de indbyrdes forseglede modstående flanger og lågkanter, inden bægeret 1 føres frem til en vendeindretning 18, hvor det drejes 90 °, således at bægerets 1 resterende 25 flanger kan forsegles med låget eller omvendt ved hjælp af et andet mikrobølgeopvarmningsaggregat 19, som er placeret efter vendeindretningen 18, men før lukkemaskinens udføringsafsnit. Det andet mikrobølgeopvarmningsaggregat 19 er udformet og arbejder på samme måde som 30 det første aggregat 11. Ved den viste eksempelvise udfø relsesform er transportøren 3 opbygget af standard-bånd-transportører og er sammensat af to bånd, nemlig et kort indføringsbånd og et bånd til de øvrige af maskinens procestrin. Lågudtagningen fra magasinet 20 er roterende.
35 Omstilling fra et bægerformat til et andet kan manuelt udføres på mindre end 30 minutter.

Claims (1)

  1. DK 163491 B 3 Indretning til med et plant låg at lukke et med flanger forsynet fyldt papbæger, og som består af en lukkemaskine med mindst en gennem denne forløbende inddelings-5 uafhængig transportør (3), kendetegnet ved, at der ved transportørens (3) begyndelse, set i fremføringsretningen, findes et stopgardin (4), som tjener til at fastholde et låg (2), medens dette ligger oven på skinner (9, 10), som er placeret over transportøren 10 (3) og bægrene (1) på denne, indtil et bæger (1) er blevet fremført ind under låget (2); at der umiddelbart efter stopgardinet er anbragt fremføringsruller (5-8) til at føre bægeret (1) med det oven på dette liggende låg (2) fremefter med to modstående flanger på bægeret 15 (1) løbende i C-formede skinner (12, 13), som hører til et mikrobølgeopvarmningsaggregat (11) og tjener til at fastgøre låget (2) på disse to modstående flanger; at der umiddelbart efter de C-formede skinner er anbragt fasttryknings- eller forseglingsruller (14-17) til at trykke låget (.2) og flangerne sammen, inden bægeret 20 (1) når frem til en drejeindretning (18), hvor det drejes 90 °; og at der efter denne indretning (18) i fremførings-retningen er anbragt et andet mikrobølgeopvarmningsaggregat (19) til indbyrdes at forsegle modstående kant-partier af låget med to andre modstående flanger på 25 bægeret (1).
DK400288A 1986-11-19 1988-07-18 Indretning til at lukke et fyldt papbaeger, som er forsynet med flanger DK163491C (da)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
SE8604965 1986-11-19
SE8604965A SE454771B (sv) 1986-11-19 1986-11-19 Anordning for forslutning av ett flensforsett, fyllt kartongtrag
SE8700544 1987-02-12
PCT/SE1987/000544 WO1988003894A1 (en) 1986-11-19 1987-11-19 Method and apparatus for closing a filled, flanged carton tray

Publications (4)

Publication Number Publication Date
DK400288D0 DK400288D0 (da) 1988-07-18
DK400288A DK400288A (da) 1988-07-18
DK163491B true DK163491B (da) 1992-03-09
DK163491C DK163491C (da) 1992-08-31

Family

ID=20366345

Family Applications (1)

Application Number Title Priority Date Filing Date
DK400288A DK163491C (da) 1986-11-19 1988-07-18 Indretning til at lukke et fyldt papbaeger, som er forsynet med flanger

Country Status (11)

Country Link
US (1) US4969306A (da)
EP (1) EP0414676B1 (da)
JP (1) JP2641550B2 (da)
AT (1) ATE80844T1 (da)
AU (1) AU601538B2 (da)
DE (1) DE3781901T2 (da)
DK (1) DK163491C (da)
FI (1) FI84800C (da)
NO (1) NO171897C (da)
SE (1) SE454771B (da)
WO (1) WO1988003894A1 (da)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3706017A1 (de) * 1987-02-25 1988-09-08 Basf Ag Mit funktionalisierten polymeren schlagzaeh modifizierte thermoplaste und deren verwendung zur herstellung von formteilen
US5302227A (en) * 1992-03-20 1994-04-12 Kliklok Corporation Method for closing a heat-resistant carton
US5243808A (en) * 1992-09-01 1993-09-14 Kliklok Corporation Flanged carton sealing apparatus and method
US5803260A (en) * 1997-06-11 1998-09-08 Walco Packaging Company, Inc. Total plastic product-retention package
US6906292B2 (en) * 1998-10-29 2005-06-14 Applera Corporation Sample tray heater module
US6419827B1 (en) 1998-10-29 2002-07-16 Applera Corporation Purification apparatus and method
US6159368A (en) 1998-10-29 2000-12-12 The Perkin-Elmer Corporation Multi-well microfiltration apparatus
US6896849B2 (en) * 1998-10-29 2005-05-24 Applera Corporation Manually-operable multi-well microfiltration apparatus and method
EP1386432A4 (en) * 2001-03-21 2009-07-15 John A Stine ACCESS AND ROUTING PROTOCOL FOR AD-HO NETWORKS USING SYNCHRONOUS COLLISION RESOLUTION AND NODE STATE DISTRIBUTION
US6820401B2 (en) * 2001-10-31 2004-11-23 International Product Technology, Inc. Method and apparatus for tensioning cover tape

Family Cites Families (13)

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Publication number Priority date Publication date Assignee Title
US3124916A (en) * 1964-03-17 Filling and capping machine
US2889675A (en) * 1957-10-09 1959-06-09 Scandia Packaging Mach Machine for covering containers
US3064697A (en) * 1960-02-03 1962-11-20 Nat Dairy Prod Corp Apparatus for filling containers
US3325969A (en) * 1964-05-12 1967-06-20 Robalex Inc Heat sealing apparatus
US3626659A (en) * 1970-06-12 1971-12-14 Johnnie J Breitbach Apparatus for applying lids to pans
US3780493A (en) * 1971-11-15 1973-12-25 Diamond Int Corp Package capping apparatus
US3812641A (en) * 1973-04-03 1974-05-28 R Bemiss Method of forming, filling and closing cartons, and specific cartons therefor
US3866387A (en) * 1973-07-05 1975-02-18 Grant Frank A Tray wrapping apparatus and method
US3994117A (en) * 1974-09-24 1976-11-30 Phillips Petroleum Company Method and apparatus for filling containers
US4102113A (en) * 1977-06-27 1978-07-25 Raque Food Systems Inc. Cover feeding apparatus
GB2119308A (en) * 1982-04-30 1983-11-16 Metal Box Plc Sealing lids to tray-like containers
SE443069B (sv) * 1984-09-26 1986-02-10 Sprinter System Ab Anordning for uppvermning av termoplastmaterial eller termoplastbelagt pappersmaterial medelst mikrovagsenergi
US4742666A (en) * 1987-08-12 1988-05-10 Osgood Industries, Inc. Method and apparatus for forming tamper-evident containers

Also Published As

Publication number Publication date
JP2641550B2 (ja) 1997-08-13
NO171897C (no) 1993-05-19
NO883141L (no) 1988-07-14
SE8604965D0 (sv) 1986-11-19
FI84800C (fi) 1992-01-27
AU8329987A (en) 1988-06-16
EP0414676A1 (en) 1991-03-06
DE3781901D1 (de) 1992-10-29
DE3781901T2 (de) 1993-04-01
SE454771B (sv) 1988-05-30
DK400288D0 (da) 1988-07-18
DK163491C (da) 1992-08-31
NO883141D0 (no) 1988-07-14
US4969306A (en) 1990-11-13
JPH02500511A (ja) 1990-02-22
AU601538B2 (en) 1990-09-13
WO1988003894A1 (en) 1988-06-02
DK400288A (da) 1988-07-18
ATE80844T1 (de) 1992-10-15
FI84800B (fi) 1991-10-15
FI883411L (fi) 1988-07-18
FI883411A0 (fi) 1988-07-18
NO171897B (no) 1993-02-08
EP0414676B1 (en) 1992-09-23

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