JPS5577525A - Method of laminating glass fiber reinforcing thermal plastic resin - Google Patents

Method of laminating glass fiber reinforcing thermal plastic resin

Info

Publication number
JPS5577525A
JPS5577525A JP6490579A JP6490579A JPS5577525A JP S5577525 A JPS5577525 A JP S5577525A JP 6490579 A JP6490579 A JP 6490579A JP 6490579 A JP6490579 A JP 6490579A JP S5577525 A JPS5577525 A JP S5577525A
Authority
JP
Japan
Prior art keywords
mat
resin
zone
cooling
pressure
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.)
Granted
Application number
JP6490579A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6315135B2 (fr
Inventor
Arufuretsudo Bauman Jiyon
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.)
PPG Industries Inc
Original Assignee
PPG Industries Inc
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 PPG Industries Inc filed Critical PPG Industries Inc
Publication of JPS5577525A publication Critical patent/JPS5577525A/ja
Publication of JPS6315135B2 publication Critical patent/JPS6315135B2/ja
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B15/00—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00
    • B29B15/08—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00 of reinforcements or fillers
    • B29B15/10—Coating or impregnating independently of the moulding or shaping step
    • B29B15/12—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B15/00—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00
    • B29B15/08—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00 of reinforcements or fillers
    • B29B15/10—Coating or impregnating independently of the moulding or shaping step
    • B29B15/12—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length
    • B29B15/122—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length with a matrix in liquid form, e.g. as melt, solution or latex
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
    • B29C43/228—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length using endless belts feeding the material between non-rotating pressure members, e.g. vibrating pressure members
    • 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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/40—Shaping or impregnating by compression not applied
    • B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
    • B29C70/504—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC] using rollers or pressure bands
    • B29C70/506—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC] using rollers or pressure bands and impregnating by melting a solid material, e.g. sheet, powder, fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B5/00—Presses characterised by the use of pressing means other than those mentioned in the preceding groups
    • B30B5/04—Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of an endless band
    • B30B5/06—Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of an endless band co-operating with another endless band
    • B30B5/065—Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of an endless band co-operating with another endless band using anti-friction means for the pressing band
    • B30B5/067—Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of an endless band co-operating with another endless band using anti-friction means for the pressing band using anti-friction roller means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/44—Compression means for making articles of indefinite length
    • B29C43/48—Endless belts
    • B29C2043/483—Endless belts cooperating with a second endless belt, i.e. double band presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/101—Glass fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/08—Reinforcements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2315/00—Other materials containing non-metallic inorganic compounds not provided for in groups B32B2311/00 - B32B2313/04
    • B32B2315/08—Glass
    • B32B2315/085—Glass fiber cloth or fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2398/00—Unspecified macromolecular compounds
    • B32B2398/20—Thermoplastics

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Laminated Bodies (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Reinforced Plastic Materials (AREA)
JP6490579A 1978-12-04 1979-05-25 Method of laminating glass fiber reinforcing thermal plastic resin Granted JPS5577525A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US96595678A 1978-12-04 1978-12-04

Publications (2)

Publication Number Publication Date
JPS5577525A true JPS5577525A (en) 1980-06-11
JPS6315135B2 JPS6315135B2 (fr) 1988-04-04

Family

ID=25510726

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6490579A Granted JPS5577525A (en) 1978-12-04 1979-05-25 Method of laminating glass fiber reinforcing thermal plastic resin

Country Status (9)

Country Link
JP (1) JPS5577525A (fr)
BE (1) BE876870A (fr)
CA (1) CA1135923A (fr)
CH (1) CH629700A5 (fr)
DE (1) DE2948235C2 (fr)
FR (1) FR2443325A1 (fr)
GB (1) GB2040801B (fr)
IT (1) IT1124939B (fr)
NL (1) NL7904768A (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57167830U (fr) * 1981-04-16 1982-10-22
JPS61236832A (ja) * 1985-03-25 1986-10-22 エルフ　アトケム　ソシエテ　アノニム 繊維強化熱可塑ポリマー複合材とその製造方法
JPS61279519A (ja) * 1985-06-06 1986-12-10 Nippon Sheet Glass Co Ltd 強化樹脂板連続製造装置
JPS61279520A (ja) * 1985-06-06 1986-12-10 Nippon Sheet Glass Co Ltd 強化樹脂板連続製造装置
JPS6362713A (ja) * 1986-09-03 1988-03-19 Kouseinou Jushi Shinseizou Gijutsu Kenkyu Kumiai 繊維補強樹脂連続成形体の製造方法及びその装置
US5225140A (en) * 1990-03-30 1993-07-06 Kuraray Co., Ltd. Method and apparatus for manufacturing a fiber reinforced thermoplastic sheet-shaped molding by using suction to partially impregnate a fiber web
WO1999032278A1 (fr) * 1997-12-19 1999-07-01 Chisso Corporation Structure lamellaire en resine thermoplastique renforcee par des fibres continues
JP2007526152A (ja) * 2004-03-05 2007-09-13 アルカン テヒノロギー ウント メーニッジメント リミテッド 繊維強化されたプラスチックプレートの連続生産方法
JP2016539824A (ja) * 2013-11-22 2016-12-22 サイテック インダストリーズ インコーポレイテッド プリプレグを形成するために繊維を含浸するための方法及びシステム

Families Citing this family (38)

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IT1199977B (it) * 1982-01-28 1989-01-05 Vitrofil Spa Procedimento e dispositivo per la produzione in continuo di lastre di polimeri termoplastici rinforzate con fibre di vetro
DE3242089A1 (de) * 1982-11-13 1984-05-17 Basf Ag Verfahren zur kontinuierlichen herstellung von halbzeug aus faserverstaerkten, thermoplastischen polyurethanen
EP0137449B1 (fr) * 1983-10-05 1992-01-22 Nippon Petrochemicals Co., Ltd. Procédé pour la fabrication d'une feuille en matière thermoplastique ou en matière plastique contenant des matières de remplissage
FR2570329B1 (fr) * 1984-09-17 1987-02-06 Solvay Procede et appareillage pour realiser un produit stratifie forme d'une resine thermoplastique renforcee par des fibres
DE3530309A1 (de) * 1985-08-24 1987-02-26 Held Kurt Verfahren und vorrichtung zum kontinuierlichen herstellen thermoplastischer kunststoffbahnen
DE3535272C2 (de) * 1985-10-03 1995-04-13 Basf Ag Halbzeug aus einem, mit einem thermoplastischen Kunststoff getränkten textilen Flächengebilde
DE3540389C1 (de) * 1985-11-14 1991-09-26 Santrade Ltd Vorrichtung zur Herstellung von glasmattenverstaerkten Thermoplasten
IT1188405B (it) * 1986-03-03 1988-01-14 Montedison Spa Procedimento per la produzione in continuo di compositi termoplastici termoformabili
DE3734276A1 (de) * 1987-10-09 1989-04-20 Lentia Gmbh Faserverstaerkte thermoplaste mit deckfolien
IT1223090B (it) * 1987-11-09 1990-09-12 Amalia Pessina Procedimento per produrre lastre termoplastiche rinforzate ed apparecchiatura relativa
DE3734296A1 (de) * 1987-11-19 1989-04-20 Lentia Gmbh Verfahren und vorrichtung zur herstellung von faserverstaerkten thermoplastplatten
DE3840374A1 (de) * 1988-11-30 1990-05-31 Lentia Gmbh Thermoplastischer faserverstaerkter verbundwerkstoff mit einem gehalt an polyamiden
JP2603353B2 (ja) * 1990-04-20 1997-04-23 日本石油株式会社 ポリオレフィン材料の連続的製造方法
US5164135A (en) * 1990-09-26 1992-11-17 Davidson Textron Inc. In-mold mating of substrate material to vinyl skin covering for the construction of two-component automotive interior trim parts
DE4035610A1 (de) * 1990-11-09 1992-05-14 Basf Ag Verfahren zur herstellung von faserverbundwerkstoffen
WO1992011986A1 (fr) * 1991-01-11 1992-07-23 Mitsui Toatsu Chemicals, Incorporated Procede et dispositif pour le formage en continu d'une resine renforcee par des fibres et se presentant sous la forme de tiges
ATA196292A (de) * 1992-10-05 1995-04-15 Danubia Petrochem Polymere Verfahren zur herstellung von faserverstärktem, thermoplastischem material
US5484276A (en) * 1992-11-20 1996-01-16 Takeda Chemical Industries, Ltd. Curing apparatus for molding compound
DE4429599A1 (de) 1994-08-20 1996-02-22 Basf Ag Biegesteifer Faserverbundwerkstoff
EP0842038B2 (fr) † 1995-07-28 2004-11-03 SAERTEX Wagener GmbH & Co. KG Procede de fabrication d'une armature pour matrices thermoplastiques et thermodurcissables
FR2743822B1 (fr) * 1996-01-19 1998-03-20 Vetrotex France Sa Procede et dispositif de fabrication d'un materiau composite
US5665185A (en) * 1996-02-09 1997-09-09 Esfi Acquisition, Inc. Process for preparing glass fiber containing polymer sheet
DE19738388A1 (de) * 1997-09-03 1998-02-26 Inst Verbundwerkstoffe Gmbh Dickenadaptives, flächiges, textilverstärktes Halbzeug mit thermoplastischer Matrix
WO2000000351A1 (fr) * 1998-06-30 2000-01-06 Symalit Ag Procede de production d'un corps composite a partir d'un plastique renforce par des fibres et corps composite ainsi obtenu
US7022200B2 (en) * 2002-01-08 2006-04-04 Amad Tayebi Method of making adhesive-free bonded porous thermoplastic nibs for markers and highlighter applications
CA2854672A1 (fr) * 2011-11-04 2013-05-10 Havco Wood Products Llc Stratifies en polyurethanne obtenus a l'aide d'une presse a double courroie
KR101607362B1 (ko) * 2012-12-21 2016-03-30 (주)엘지하우시스 복합재료 제조 장치와, 이를 사용하여 제조되는 복합재료, 복합재료 제조 방법
CN103112234A (zh) * 2013-03-04 2013-05-22 苏州裕克施乐塑料制品有限公司 复合材料薄板生产方法及其双张紧装置
WO2015052114A1 (fr) 2013-10-08 2015-04-16 Bayer Materialscience Ag Matériau composite renforcé de fibres, son utilisation et son procédé de fabrication
EP2875944A1 (fr) 2013-11-25 2015-05-27 Bond Laminates GmbH Matériaux en fibres composites grainés
DE102016202746A1 (de) * 2016-02-23 2017-08-24 Thyssenkrupp Ag Verfahren zum Herstellen eines Halbzeugs, Halbzeug sowie dessen Verwendung
WO2018166787A1 (fr) 2017-03-13 2018-09-20 Hexcel Composites Limited Procédé et appareil pour imprégner un matériau de renfort
CN111032326B (zh) * 2017-06-14 2022-04-19 Php纤维有限公司 条形复合材料
EP3738738B1 (fr) * 2018-01-12 2024-03-13 Toray Industries, Inc. Appareil de chauffage pour feuille de résine thermoplastique et méthode de fabrication de corps moulé en résine thermoplastique
US10982441B2 (en) 2018-03-09 2021-04-20 Tamko Building Products, Llc Multiple layer substrate for roofing materials
WO2021050078A1 (fr) * 2019-09-13 2021-03-18 Sabic Global Technologies B.V. Méthode de formation d'un composite, et composite et appareil associés
US11738486B2 (en) 2021-02-09 2023-08-29 Continuus Materials Intellectual Property, Llc Rapidly heating and cooling composite mats comprised of cellulose and thermoplastic polymer
CN113043626B (zh) * 2021-03-12 2022-08-12 上犹耀兴复合材料有限公司 一种用于玻纤板的挤压成型设备

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5112879A (fr) * 1974-07-23 1976-01-31 Mitsubishi Plastics Ind

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FR927008A (fr) * 1945-05-17 1947-10-17 Sylvania Ind Corp Matières en feuilles et leur fabrication
US2612462A (en) * 1947-11-20 1952-09-30 Johns Manville Laminated insulating block and method of making the same
BE505297A (fr) * 1950-10-09
FR1199550A (fr) * 1957-03-14 1959-12-15 Owens Corning Fiberglass Corp Procédé de fabrication de produits composites de mousse et de fibres
US3684645A (en) * 1969-03-25 1972-08-15 Ppg Industries Inc Glass fiber reinforced thermoplastic article
BE758612A (fr) * 1969-11-07 1971-04-16 Bayer Ag Procede et dispositif pour la production de plaques ou de feuilles en matiere thermoplastique renforcees aux fibres, et plaque ou feuille ainsi obtenue
FR2096929A1 (en) * 1970-07-07 1972-03-03 Rhodiaceta Particle board panels - glazed with a pulped polyamide dressing in a single pressing operation
CH509877A (de) * 1970-11-27 1971-07-15 Alusuisse Verfahren und Vorrichtung zur Herstellung von mehrschichtigen Verbundplatten
JPS522424B2 (fr) * 1972-08-18 1977-01-21
DE2312816C3 (de) * 1973-03-15 1983-02-03 Basf Ag, 6700 Ludwigshafen Verfahren zur kontinuierlichen Herstellung von Halbzeug aus glasfaserverstärkten thermoplastischen Kunststoffen
DE2500706B2 (de) * 1975-01-09 1979-05-03 Kuesters, Eduard, 4150 Krefeld Presse zur Ausübung einer Flächen pressung
US4098943A (en) * 1975-09-25 1978-07-04 Allied Chemical Corporation Fiber reinforced multi-ply stampable thermoplastic sheet

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
JPS5112879A (fr) * 1974-07-23 1976-01-31 Mitsubishi Plastics Ind

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6212592Y2 (fr) * 1981-04-16 1987-04-01
JPS57167830U (fr) * 1981-04-16 1982-10-22
JPS61236832A (ja) * 1985-03-25 1986-10-22 エルフ　アトケム　ソシエテ　アノニム 繊維強化熱可塑ポリマー複合材とその製造方法
JPH0371457B2 (fr) * 1985-03-25 1991-11-13 Atochem
JPS61279520A (ja) * 1985-06-06 1986-12-10 Nippon Sheet Glass Co Ltd 強化樹脂板連続製造装置
JPS61279519A (ja) * 1985-06-06 1986-12-10 Nippon Sheet Glass Co Ltd 強化樹脂板連続製造装置
JPH0458367B2 (fr) * 1985-06-06 1992-09-17 Nippon Ita Garasu Kk
JPS6362713A (ja) * 1986-09-03 1988-03-19 Kouseinou Jushi Shinseizou Gijutsu Kenkyu Kumiai 繊維補強樹脂連続成形体の製造方法及びその装置
JPH0582283B2 (fr) * 1986-09-03 1993-11-18 Koseino Jushi Shinseizo Gijuts
US5225140A (en) * 1990-03-30 1993-07-06 Kuraray Co., Ltd. Method and apparatus for manufacturing a fiber reinforced thermoplastic sheet-shaped molding by using suction to partially impregnate a fiber web
WO1999032278A1 (fr) * 1997-12-19 1999-07-01 Chisso Corporation Structure lamellaire en resine thermoplastique renforcee par des fibres continues
JP2007526152A (ja) * 2004-03-05 2007-09-13 アルカン テヒノロギー ウント メーニッジメント リミテッド 繊維強化されたプラスチックプレートの連続生産方法
JP2016539824A (ja) * 2013-11-22 2016-12-22 サイテック インダストリーズ インコーポレイテッド プリプレグを形成するために繊維を含浸するための方法及びシステム

Also Published As

Publication number Publication date
CA1135923A (fr) 1982-11-23
BE876870A (fr) 1979-12-10
IT1124939B (it) 1986-05-14
FR2443325B1 (fr) 1982-12-03
IT7927130A0 (it) 1979-11-08
CH629700A5 (fr) 1982-05-14
GB2040801B (en) 1982-12-08
DE2948235C2 (de) 1985-06-05
NL7904768A (nl) 1980-06-06
DE2948235A1 (de) 1980-06-12
FR2443325A1 (fr) 1980-07-04
GB2040801A (en) 1980-09-03
JPS6315135B2 (fr) 1988-04-04

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