DE2938905A1 - Verfahren und vorrichtung zum herstellen von formlingen aus thermoplastischem kunststoff, der sich mittels physikalischer einfluesse, insbesondere temperatureinfluesse, wahlweise in seinem teilkristallinen zustand einstellen laesst - Google Patents
Verfahren und vorrichtung zum herstellen von formlingen aus thermoplastischem kunststoff, der sich mittels physikalischer einfluesse, insbesondere temperatureinfluesse, wahlweise in seinem teilkristallinen zustand einstellen laesstInfo
- Publication number
- DE2938905A1 DE2938905A1 DE19792938905 DE2938905A DE2938905A1 DE 2938905 A1 DE2938905 A1 DE 2938905A1 DE 19792938905 DE19792938905 DE 19792938905 DE 2938905 A DE2938905 A DE 2938905A DE 2938905 A1 DE2938905 A1 DE 2938905A1
- Authority
- DE
- Germany
- Prior art keywords
- temperature
- semi
- finished product
- plastic
- conditioning
- 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.)
- Ceased
Links
- 238000000034 method Methods 0.000 title claims description 88
- 229920001169 thermoplastic Polymers 0.000 title claims description 5
- 239000011265 semifinished product Substances 0.000 claims description 134
- 229920003023 plastic Polymers 0.000 claims description 100
- 239000004033 plastic Substances 0.000 claims description 100
- 238000000465 moulding Methods 0.000 claims description 92
- 238000003856 thermoforming Methods 0.000 claims description 77
- 230000003750 conditioning effect Effects 0.000 claims description 74
- 239000013078 crystal Substances 0.000 claims description 47
- 230000006641 stabilisation Effects 0.000 claims description 30
- 238000011105 stabilization Methods 0.000 claims description 30
- -1 polyethylene terephthalate Polymers 0.000 claims description 28
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 26
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 26
- 230000008569 process Effects 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 22
- 238000001816 cooling Methods 0.000 claims description 19
- 230000000087 stabilizing effect Effects 0.000 claims description 19
- 238000004519 manufacturing process Methods 0.000 claims description 14
- 230000008859 change Effects 0.000 claims description 12
- 238000001125 extrusion Methods 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 11
- 238000005096 rolling process Methods 0.000 claims description 11
- 238000003490 calendering Methods 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 7
- 238000005755 formation reaction Methods 0.000 claims description 7
- 230000009467 reduction Effects 0.000 claims description 5
- 238000007711 solidification Methods 0.000 claims description 4
- 230000008023 solidification Effects 0.000 claims description 4
- 230000033228 biological regulation Effects 0.000 claims description 3
- 229920001707 polybutylene terephthalate Polymers 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 2
- 238000010924 continuous production Methods 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 230000002123 temporal effect Effects 0.000 claims description 2
- 239000004416 thermosoftening plastic Substances 0.000 claims 2
- 239000004744 fabric Substances 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 claims 1
- 238000011282 treatment Methods 0.000 description 15
- 238000002425 crystallisation Methods 0.000 description 6
- 230000008025 crystallization Effects 0.000 description 6
- 239000012815 thermoplastic material Substances 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 238000009740 moulding (composite fabrication) Methods 0.000 description 4
- 230000000704 physical effect Effects 0.000 description 3
- 230000000717 retained effect Effects 0.000 description 3
- LLLVZDVNHNWSDS-UHFFFAOYSA-N 4-methylidene-3,5-dioxabicyclo[5.2.2]undeca-1(9),7,10-triene-2,6-dione Chemical compound C1(C2=CC=C(C(=O)OC(=C)O1)C=C2)=O LLLVZDVNHNWSDS-UHFFFAOYSA-N 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000009210 therapy by ultrasound Methods 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- MMINFSMURORWKH-UHFFFAOYSA-N 3,6-dioxabicyclo[6.2.2]dodeca-1(10),8,11-triene-2,7-dione Chemical compound O=C1OCCOC(=O)C2=CC=C1C=C2 MMINFSMURORWKH-UHFFFAOYSA-N 0.000 description 1
- 235000007575 Calluna vulgaris Nutrition 0.000 description 1
- 238000007630 basic procedure Methods 0.000 description 1
- 238000000071 blow moulding Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000010102 injection blow moulding Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 210000003734 kidney Anatomy 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000000527 sonication Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/64—Heating or cooling preforms, parisons or blown articles
- B29C49/6409—Thermal conditioning of preforms
- B29C49/6463—Thermal conditioning of preforms by contact heating or cooling, e.g. mandrels or cores specially adapted for heating or cooling preforms
- B29C49/6464—Heating
-
- 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
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/26—Component parts, details or accessories; Auxiliary operations
- B29C51/42—Heating or cooling
- B29C51/421—Heating or cooling of preforms, specially adapted for thermoforming
- B29C51/422—Heating or cooling of preforms, specially adapted for thermoforming to produce a temperature differential
- B29C51/423—Heating or cooling of preforms, specially adapted for thermoforming to produce a temperature differential through the thickness of the preform
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/04—Extrusion blow-moulding
- B29C49/04102—Extrusion blow-moulding extruding the material continuously
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/64—Heating or cooling preforms, parisons or blown articles
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/64—Heating or cooling preforms, parisons or blown articles
- B29C49/6409—Thermal conditioning of preforms
- B29C49/6436—Thermal conditioning of preforms characterised by temperature differential
- B29C49/6445—Thermal conditioning of preforms characterised by temperature differential through the preform length
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/64—Heating or cooling preforms, parisons or blown articles
- B29C49/6409—Thermal conditioning of preforms
- B29C49/6463—Thermal conditioning of preforms by contact heating or cooling, e.g. mandrels or cores specially adapted for heating or cooling preforms
- B29C49/6465—Cooling
-
- 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
- B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
- B29C71/02—Thermal after-treatment
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/04—Extrusion blow-moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0037—Other properties
- B29K2995/0041—Crystalline
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Priority Applications (15)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19792938905 DE2938905A1 (de) | 1979-09-26 | 1979-09-26 | Verfahren und vorrichtung zum herstellen von formlingen aus thermoplastischem kunststoff, der sich mittels physikalischer einfluesse, insbesondere temperatureinfluesse, wahlweise in seinem teilkristallinen zustand einstellen laesst |
| NO802566A NO802566L (no) | 1979-09-26 | 1980-08-29 | Fremgangsmaate og anordning ved fremstilling av formede legemer av termoplastisk plast |
| DK371180A DK371180A (da) | 1979-09-26 | 1980-09-01 | Fremgangsmaade og apparat til fremstilling af formlegemer af termoplastisk formstof |
| NL8005039A NL8005039A (nl) | 1979-09-26 | 1980-09-05 | Werkwijze en inrichting voor het vervaardigen van vorm- lingen uit thermoplastische kunststof, die zich door fysische invloeden, in het bijzonder temperatuurinvloe- den, naar keuze in zijn gedeeltelijk kristallijne toestand laat instellen. |
| FI802843A FI802843A (fi) | 1979-09-26 | 1980-09-10 | Foerfarande och anordning foer tillverkning av presstycken av termoplast som kan fysikaliskt i synnerhet med hjaelp av vaerme valbart foervandlas i sitt delvis kristalliniska tillstaond |
| ES494962A ES494962A0 (es) | 1979-09-26 | 1980-09-11 | Procedimiento para la fabricacion de piezas moldeadas de ma-terial sintetico termoplastico |
| GB8029403A GB2059328B (en) | 1979-09-26 | 1980-09-11 | Method and apparatus for the production of mouldings from thermoplastic material whose partially crystalline state can be adjusted by physical effects more particularly temperature effects |
| ZA00805677A ZA805677B (en) | 1979-09-26 | 1980-09-15 | Method and apparatus for the production of mouldings from thermoplastics material whose partially crystalline state can be adjusted by physical effects, more particularly temperature effects |
| SE8006558A SE8006558L (sv) | 1979-09-26 | 1980-09-18 | Forfarande for framstellning av formprodukter av termoplast vars partiellt kristallinska tillstand kan godtyckligt justeras medelst fysikalisk paverkan, serskilt temperaturpaverkan |
| FR8020494A FR2465586A1 (fr) | 1979-09-26 | 1980-09-24 | Procede et installation pour la fabrication d'objets moules en matieres thermoplastiques pouvant etre amenees a l'etat partiellement cristallise |
| JP13308280A JPS56106845A (en) | 1979-09-26 | 1980-09-26 | Method and device for manufacturing molding consisting of thermoplastic plastic which can selectively adjust its partial crystalline condition by physical action |
| BE0/202262A BE885436A (fr) | 1979-09-26 | 1980-09-26 | Procede et dispositif de preparation de produits de formage en substance synthetique thermoplastique |
| YU02461/80A YU246180A (en) | 1979-09-26 | 1980-09-26 | Device for obtaining casts of a crystallizable thermoplastic artificial material |
| ES495803A ES8106436A1 (es) | 1979-09-26 | 1980-10-10 | Dispositivo para la fabricacion de piezas moldeadas a base de material sintetico termoplastico |
| YU00324/83A YU32483A (en) | 1979-09-26 | 1983-02-11 | Method of obtaining casts of a thermoplastic artificial mass, the partly crystallized condition of which is adjustable by means of physical influences, particularly by the action of heat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19792938905 DE2938905A1 (de) | 1979-09-26 | 1979-09-26 | Verfahren und vorrichtung zum herstellen von formlingen aus thermoplastischem kunststoff, der sich mittels physikalischer einfluesse, insbesondere temperatureinfluesse, wahlweise in seinem teilkristallinen zustand einstellen laesst |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2938905A1 true DE2938905A1 (de) | 1981-04-16 |
Family
ID=6081867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19792938905 Ceased DE2938905A1 (de) | 1979-09-26 | 1979-09-26 | Verfahren und vorrichtung zum herstellen von formlingen aus thermoplastischem kunststoff, der sich mittels physikalischer einfluesse, insbesondere temperatureinfluesse, wahlweise in seinem teilkristallinen zustand einstellen laesst |
Country Status (13)
| Country | Link |
|---|---|
| JP (1) | JPS56106845A (xx) |
| BE (1) | BE885436A (xx) |
| DE (1) | DE2938905A1 (xx) |
| DK (1) | DK371180A (xx) |
| ES (2) | ES494962A0 (xx) |
| FI (1) | FI802843A (xx) |
| FR (1) | FR2465586A1 (xx) |
| GB (1) | GB2059328B (xx) |
| NL (1) | NL8005039A (xx) |
| NO (1) | NO802566L (xx) |
| SE (1) | SE8006558L (xx) |
| YU (2) | YU246180A (xx) |
| ZA (1) | ZA805677B (xx) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0233402A2 (en) * | 1985-11-27 | 1987-08-26 | Therma-Plate Corporation | Method and apparatus for producing a heat set article of thermoformed pet, and articles made by such method |
| DE19636062A1 (de) * | 1996-09-05 | 1998-03-12 | Georg Geis Maschinenfabrik | Verfahren und Vorrichtung zur Umformung und nachfolgenden Kristallisation von amorphen, kristallisierbaren Thermoplasten |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1985002142A1 (en) * | 1983-11-11 | 1985-05-23 | A.A.R.C. (Management) Pty. Limited | Molten thermoplastic web feeding process and apparatus |
| ES2046295T3 (es) * | 1987-03-17 | 1994-02-01 | Tetra Laval Holdings & Finance S.A. | Formacion de materiales de banda termoplasticos. |
| ES2103739T3 (es) * | 1989-04-07 | 1997-10-01 | Tetra Laval Holdings & Finance | Procedimiento y aparato de termoconformacion con alimentacion continua. |
| US5032339A (en) * | 1990-07-19 | 1991-07-16 | E. I. Du Pont De Nemours And Company | Process for shaping fiber reinforced thermoplastic articles |
| IE68430B1 (en) * | 1990-08-12 | 1996-06-12 | Polysheet Ireland Ltd | A method and apparatus for forming an article of PET material |
| JP2003039539A (ja) * | 2001-08-01 | 2003-02-13 | Asano Laboratories Co Ltd | 樹脂シート成形システム、樹脂シート成形方法およびｐｅｔシート成形システム |
| US7029732B2 (en) | 2002-02-28 | 2006-04-18 | Boston Scientific Scimed, Inc. | Medical device balloons with improved strength properties and processes for producing same |
| US20050182233A1 (en) * | 2004-01-29 | 2005-08-18 | Stephen Weinhold | Compression-induced crystallization of crystallizable polymers |
| FI126959B (fi) | 2010-04-08 | 2017-08-31 | Juha Varis | Menetelmä ja laitteisto komposiittituotteen valmistamiseksi |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3765998A (en) * | 1971-01-11 | 1973-10-16 | Allied Chem | Shapable fiber-reinforced low molecular weight polyethylene terephthalate |
| US3776681A (en) * | 1971-04-27 | 1973-12-04 | Standard Oil Co | Thermoforming apparatus |
| JPS50156576A (xx) * | 1974-06-07 | 1975-12-17 | ||
| JPS5385855A (en) * | 1976-12-31 | 1978-07-28 | Asano Kenkyusho Kk | Sheet molding apparatus equipped extruder |
-
1979
- 1979-09-26 DE DE19792938905 patent/DE2938905A1/de not_active Ceased
-
1980
- 1980-08-29 NO NO802566A patent/NO802566L/no unknown
- 1980-09-01 DK DK371180A patent/DK371180A/da not_active Application Discontinuation
- 1980-09-05 NL NL8005039A patent/NL8005039A/nl not_active Application Discontinuation
- 1980-09-10 FI FI802843A patent/FI802843A/fi not_active Application Discontinuation
- 1980-09-11 GB GB8029403A patent/GB2059328B/en not_active Expired
- 1980-09-11 ES ES494962A patent/ES494962A0/es active Granted
- 1980-09-15 ZA ZA00805677A patent/ZA805677B/xx unknown
- 1980-09-18 SE SE8006558A patent/SE8006558L/xx not_active Application Discontinuation
- 1980-09-24 FR FR8020494A patent/FR2465586A1/fr active Granted
- 1980-09-26 BE BE0/202262A patent/BE885436A/fr not_active IP Right Cessation
- 1980-09-26 JP JP13308280A patent/JPS56106845A/ja active Pending
- 1980-09-26 YU YU02461/80A patent/YU246180A/xx unknown
- 1980-10-10 ES ES495803A patent/ES8106436A1/es not_active Expired
-
1983
- 1983-02-11 YU YU00324/83A patent/YU32483A/xx unknown
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0233402A2 (en) * | 1985-11-27 | 1987-08-26 | Therma-Plate Corporation | Method and apparatus for producing a heat set article of thermoformed pet, and articles made by such method |
| EP0233402A3 (en) * | 1985-11-27 | 1989-02-08 | Edward A. Demerest | Method and apparatus for producing a heat set article of thermoformed pet, and articles made by such method |
| DE19636062A1 (de) * | 1996-09-05 | 1998-03-12 | Georg Geis Maschinenfabrik | Verfahren und Vorrichtung zur Umformung und nachfolgenden Kristallisation von amorphen, kristallisierbaren Thermoplasten |
Also Published As
| Publication number | Publication date |
|---|---|
| ES8106663A1 (es) | 1981-08-01 |
| ES495803A0 (es) | 1981-07-01 |
| GB2059328A (en) | 1981-04-23 |
| ZA805677B (en) | 1981-10-28 |
| GB2059328B (en) | 1984-01-04 |
| YU32483A (en) | 1983-10-31 |
| ES494962A0 (es) | 1981-08-01 |
| ES8106436A1 (es) | 1981-07-01 |
| NO802566L (no) | 1981-03-27 |
| FR2465586B1 (xx) | 1984-02-03 |
| NL8005039A (nl) | 1981-03-30 |
| BE885436A (fr) | 1981-01-16 |
| JPS56106845A (en) | 1981-08-25 |
| FR2465586A1 (fr) | 1981-03-27 |
| DK371180A (da) | 1981-03-27 |
| FI802843A (fi) | 1981-03-27 |
| SE8006558L (sv) | 1981-03-27 |
| YU246180A (en) | 1983-10-31 |
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