SE7500176L - - Google Patents
Info
- Publication number
- SE7500176L SE7500176L SE7500176A SE7500176A SE7500176L SE 7500176 L SE7500176 L SE 7500176L SE 7500176 A SE7500176 A SE 7500176A SE 7500176 A SE7500176 A SE 7500176A SE 7500176 L SE7500176 L SE 7500176L
- Authority
- SE
- Sweden
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F5/00—Compounds of magnesium
- C01F5/02—Magnesia
- C01F5/06—Magnesia by thermal decomposition of magnesium compounds
- C01F5/10—Magnesia by thermal decomposition of magnesium compounds by thermal decomposition of magnesium chloride with water vapour
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- 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
- B29C49/071—Preforms or parisons characterised by their configuration, e.g. geometry, dimensions or physical properties
-
- 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
- B29C49/08—Biaxial stretching during blow-moulding
- B29C49/16—Biaxial stretching during blow-moulding using pressure difference for pre-stretching, e.g. pre-blowing
-
- 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
- B29C49/6472—Heating or cooling preforms, parisons or blown articles in several stages
-
- 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
- B29C49/78—Measuring, controlling or regulating
- B29C2049/7879—Stretching, e.g. stretch rod
-
- 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
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/07—Preforms or parisons characterised by their configuration
- B29C2949/0715—Preforms or parisons characterised by their configuration the preform having one end closed
-
- 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
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/07—Preforms or parisons characterised by their configuration
- B29C2949/072—Preforms or parisons characterised by their configuration having variable wall thickness
-
- 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
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/07—Preforms or parisons characterised by their configuration
- B29C2949/072—Preforms or parisons characterised by their configuration having variable wall thickness
- B29C2949/0724—Preforms or parisons characterised by their configuration having variable wall thickness at body portion
-
- 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
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/07—Preforms or parisons characterised by their configuration
- B29C2949/073—Preforms or parisons characterised by their configuration having variable diameter
-
- 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
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/07—Preforms or parisons characterised by their configuration
- B29C2949/073—Preforms or parisons characterised by their configuration having variable diameter
- B29C2949/0733—Preforms or parisons characterised by their configuration having variable diameter at body portion
-
- 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
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/07—Preforms or parisons characterised by their configuration
- B29C2949/074—Preforms or parisons characterised by their configuration having ribs or protrusions
-
- 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
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/07—Preforms or parisons characterised by their configuration
- B29C2949/074—Preforms or parisons characterised by their configuration having ribs or protrusions
- B29C2949/0742—Circumferential
-
- 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
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/07—Preforms or parisons characterised by their configuration
- B29C2949/076—Preforms or parisons characterised by their configuration characterised by the shape
- B29C2949/0768—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform
- B29C2949/077—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform characterised by the neck
- B29C2949/0772—Closure retaining means
- B29C2949/0776—Closure retaining means not containing threads
-
- 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
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/07—Preforms or parisons characterised by their configuration
- B29C2949/076—Preforms or parisons characterised by their configuration characterised by the shape
- B29C2949/0768—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform
- B29C2949/078—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform characterised by the bottom
-
- 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
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
- B29C2949/22—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at neck portion
-
- 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
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
- B29C2949/24—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at flange portion
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- 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
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
- B29C2949/26—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at body portion
-
- 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
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
- B29C2949/28—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at bottom portion
-
- 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
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/30—Preforms or parisons made of several components
- B29C2949/3024—Preforms or parisons made of several components characterised by the number of components or by the manufacturing technique
-
- 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
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/30—Preforms or parisons made of several components
- B29C2949/3032—Preforms or parisons made of several components having components being injected
-
- 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
- B29C49/06—Injection blow-moulding
-
- 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
- B29C49/08—Biaxial stretching during blow-moulding
- B29C49/087—Means for providing controlled or limited stretch ratio
-
- 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
- B29C49/18—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor using several blowing steps
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Geometry (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2400951A DE2400951A1 (de) | 1974-01-09 | 1974-01-09 | Verfahren und vorrichtung zur herstellung von kunststoffflaschen |
Publications (1)
Publication Number | Publication Date |
---|---|
SE7500176L true SE7500176L (it) | 1975-07-10 |
Family
ID=5904450
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE7500176A SE7500176L (it) | 1974-01-09 | 1975-01-08 |
Country Status (11)
Country | Link |
---|---|
JP (1) | JPS50100166A (it) |
BE (1) | BE824127A (it) |
BR (1) | BR7500099A (it) |
CH (1) | CH580489A5 (it) |
DD (1) | DD119545A5 (it) |
DE (1) | DE2400951A1 (it) |
FR (1) | FR2256819B1 (it) |
GB (1) | GB1487002A (it) |
IT (1) | IT1027256B (it) |
NL (1) | NL7500245A (it) |
SE (1) | SE7500176L (it) |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1080416A (en) * | 1974-10-31 | 1980-07-01 | Robert P. Noonan | Oriented containers |
GB1528847A (en) * | 1975-03-13 | 1978-10-18 | Monsanto Co | Process of blow moulding bottles |
US4105730A (en) * | 1976-01-12 | 1978-08-08 | Baxter Travenol Laboratories, Inc. | Method of making a flexible, collapsible container for liquids with improved tail seal |
DE2702495A1 (de) * | 1976-01-22 | 1977-07-28 | American Can Co | Verfahren zur herstellung eines rissfreien hoch molekularorientierten geblasenen behaelters |
US4054630A (en) * | 1976-01-22 | 1977-10-18 | American Can Company | Hot pin parison injection molding technique |
DE2614451C2 (de) * | 1976-04-03 | 1984-10-18 | Battenfeld-Fischer Blasformtechnik GmbH, 5204 Lohmar | Vorrichtung zum Spritzblasformen von Hohlkörpern |
US4233022A (en) * | 1978-07-10 | 1980-11-11 | Owens-Illinois, Inc. | Apparatus for forming heat treated blown thermoplastic articles |
DE2917055C2 (de) * | 1979-04-27 | 1981-12-17 | Voith Fischer Kunststofftechnik Gmbh U. Co Kg, 5204 Lohmar | Vorrichtung zum Spritzstreckblasformen biaxial orientierter Hohlkörper aus einem thermoplastischen Kunststoff |
JPS57165223A (en) * | 1981-04-03 | 1982-10-12 | Ikegami Kaken Kogyo Kk | Preparation of blow molded hollow article |
IN157843B (it) * | 1981-06-26 | 1986-07-05 | Di Settembrini Antoine | |
JPS5881131A (ja) * | 1981-11-10 | 1983-05-16 | Mitsubishi Plastics Ind Ltd | プラスチツク製びん及びその製法 |
CA1220911A (en) * | 1982-07-27 | 1987-04-28 | Katashi Aoki | Method for the temperature control of parison in injection stretching blow molding method |
JPS59179318A (ja) * | 1983-03-31 | 1984-10-11 | Katashi Aoki | ポリプロピレンの2軸延伸吹込成形方法 |
DE3314106C2 (de) * | 1983-04-19 | 1986-07-24 | C.F. Spiess & Sohn Kunststoffwerk GmbH & Co, 6719 Kleinkarlbach | Vorrichtung zum Herstellen von Hohlkörpern aus warmformbarem Kunststoff |
US4522779A (en) * | 1983-11-28 | 1985-06-11 | Owens-Illinois, Inc. | Method for production of poly(ethylene terephthalate) articles |
FR2563767B1 (fr) * | 1984-05-02 | 1987-02-13 | Ads Sa | Procede de fabrication de corps creux en matiere thermoplastique et installation pour sa mise en oeuvre |
EP0256062B1 (de) * | 1986-01-31 | 1990-01-10 | FISCHER, Rainer | Verfahren und extrusionsblasmaschine zur herstellung von flachflaschen |
JP3294019B2 (ja) * | 1994-09-26 | 2002-06-17 | 株式会社青木固研究所 | 大型容器の延伸吹込成形方法 |
GB2474028A (en) * | 2009-09-30 | 2011-04-06 | Peter Reginald Clarke | Blow moulding of preforms |
DE102011055011A1 (de) * | 2011-11-03 | 2013-05-08 | Krones Aktiengesellschaft | Vorformling |
CN113942216A (zh) * | 2021-10-15 | 2022-01-18 | 洛阳富道生物科技有限公司 | 一种大容量细胞摇瓶的生产方法 |
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1974
- 1974-01-09 DE DE2400951A patent/DE2400951A1/de active Pending
-
1975
- 1975-01-06 BE BE152166A patent/BE824127A/xx unknown
- 1975-01-07 GB GB66075A patent/GB1487002A/en not_active Expired
- 1975-01-07 BR BR7500099A patent/BR7500099A/pt unknown
- 1975-01-07 FR FR7500353A patent/FR2256819B1/fr not_active Expired
- 1975-01-08 CH CH14075A patent/CH580489A5/xx not_active IP Right Cessation
- 1975-01-08 DD DD18354675A patent/DD119545A5/xx unknown
- 1975-01-08 SE SE7500176A patent/SE7500176L/xx unknown
- 1975-01-08 IT IT6702975A patent/IT1027256B/it active
- 1975-01-08 JP JP484175A patent/JPS50100166A/ja active Pending
- 1975-01-09 NL NL7500245A patent/NL7500245A/xx not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
FR2256819A1 (it) | 1975-08-01 |
DE2400951A1 (de) | 1975-07-17 |
GB1487002A (en) | 1977-09-28 |
DD119545A5 (it) | 1976-05-05 |
CH580489A5 (it) | 1976-10-15 |
JPS50100166A (it) | 1975-08-08 |
BR7500099A (pt) | 1975-11-04 |
BE824127A (fr) | 1975-07-07 |
IT1027256B (it) | 1978-11-20 |
FR2256819B1 (it) | 1979-09-28 |
NL7500245A (nl) | 1975-07-11 |