JPS56500530A - - Google Patents
Info
- Publication number
- JPS56500530A JPS56500530A JP50127880A JP50127880A JPS56500530A JP S56500530 A JPS56500530 A JP S56500530A JP 50127880 A JP50127880 A JP 50127880A JP 50127880 A JP50127880 A JP 50127880A JP S56500530 A JPS56500530 A JP S56500530A
- Authority
- JP
- Japan
- 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
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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/0227—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using pressure vessels, e.g. autoclaves, vulcanising pans
-
- 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
- B32B5/22—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/24—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
- B32B5/26—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
-
- 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
- B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
- B29C37/006—Degassing moulding material or draining off gas during moulding
- B29C37/0064—Degassing moulding material or draining off gas during moulding of reinforced material
-
- 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
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/44—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
-
- 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
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0036—Heat treatment
-
- 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
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/18—Handling of layers or the laminate
- B32B38/1825—Handling of layers or the laminate characterised by the control or constructional features of devices for tensioning, stretching or registration
- B32B38/1833—Positioning, e.g. registration or centering
-
- 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
- B29C2071/022—Annealing
-
- 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
- B29C2791/00—Shaping characteristics in general
- B29C2791/004—Shaping under special conditions
- B29C2791/006—Using vacuum
-
- 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
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
- B29C43/10—Isostatic pressing, i.e. using non-rigid pressure-exerting members against rigid parts or dies
- B29C43/12—Isostatic pressing, i.e. using non-rigid pressure-exerting members against rigid parts or dies using bags surrounding the moulding material or using membranes contacting the moulding material
-
- 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
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B2038/0052—Other operations not otherwise provided for
- B32B2038/0076—Curing, vulcanising, cross-linking
-
- 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
- B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
- B32B2260/02—Composition of the impregnated, bonded or embedded layer
- B32B2260/021—Fibrous or filamentary layer
- B32B2260/023—Two or more layers
-
- 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
- B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
- B32B2260/04—Impregnation, embedding, or binder material
- B32B2260/046—Synthetic resin
-
- 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
- B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
- B32B2309/60—In a particular environment
- B32B2309/68—Vacuum
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulding By Coating Moulds (AREA)
- Reinforced Plastic Materials (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/040,799 US4357193A (en) | 1979-05-21 | 1979-05-21 | Method of fabricating a composite structure |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56500530A true JPS56500530A (ja) | 1981-04-23 |
JPS649923B2 JPS649923B2 (ja) | 1989-02-20 |
Family
ID=21913027
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55501278A Expired JPS649923B2 (ja) | 1979-05-21 | 1980-04-28 |
Country Status (10)
Country | Link |
---|---|
US (1) | US4357193A (ja) |
EP (1) | EP0028637B1 (ja) |
JP (1) | JPS649923B2 (ja) |
BE (1) | BE883380A (ja) |
CA (1) | CA1146457A (ja) |
DE (1) | DE3071193D1 (ja) |
GB (1) | GB2062542B (ja) |
IT (1) | IT1143094B (ja) |
SE (1) | SE429419B (ja) |
WO (1) | WO1980002528A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003513110A (ja) * | 1998-05-20 | 2003-04-08 | サイテック テクノロジー コーポレーション | 空隙のない積層品の製造およびその使用法 |
JP2014051093A (ja) * | 2012-08-31 | 2014-03-20 | Boeing Co | 複合構造体の空隙率を低減するための方法およびシステム |
JP2016510087A (ja) * | 2013-03-15 | 2016-04-04 | ヘンケル アイピー アンド ホールディング ゲゼルシャフト ミット ベシュレンクテル ハフツング | 優れた表面仕上げおよび高い繊維圧密を有する複合材料を調製するためのプレプレグ硬化方法 |
Families Citing this family (49)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4816106A (en) * | 1984-12-13 | 1989-03-28 | Aeritalia Saipa - Gruppo Velivoli Da Trasporto | Method for the controlled curing of composites |
US4818323A (en) * | 1987-06-26 | 1989-04-04 | Motorola Inc. | Method of making a void free wafer via vacuum lamination |
US4963215A (en) * | 1987-12-07 | 1990-10-16 | The Boeing Company | Method for debulking precured thermoplastic composite laminae |
US5104474A (en) * | 1988-12-01 | 1992-04-14 | United Technologies Corporation | Method for making a fiber reinforced crosslinked polyimide matrix composite article |
GB9006253D0 (en) * | 1990-03-20 | 1990-05-16 | Short Brothers Plc | An evacuation chamber |
CA2060635A1 (en) * | 1991-02-12 | 1992-08-13 | Keith D'alessio | Bioabsorbable medical implants |
US5116216A (en) * | 1991-02-28 | 1992-05-26 | The United States Of America As Represented By The Secretary Of The Navy | Apparatus for preparing thermoplastic composites |
US5236646A (en) * | 1991-02-28 | 1993-08-17 | The United States Of America As Represented By The Secretary Of The Navy | Process for preparing thermoplastic composites |
US5273202A (en) * | 1991-10-29 | 1993-12-28 | Rolls-Royce Plc | Method of manufacturing an article, a method of diffusion bonding and a vacuum chamber |
US5925297A (en) * | 1996-11-13 | 1999-07-20 | Tetrahedron Associates, Inc. | Continuous laminating or molding process |
US6017484A (en) * | 1997-01-21 | 2000-01-25 | Harold P. Hale | Method for manufacture of minimum porosity, wrinkle free composite parts |
US6482497B1 (en) * | 1998-11-30 | 2002-11-19 | Rocky Mountain Composites Inc. | Pressure-cycled, packet-transfer infusion of resin-stitched preforms |
US6612360B1 (en) * | 1999-06-10 | 2003-09-02 | Ilc Dover, Inc. | Assembly for attaching fabric to metal and method of fabrication therefor |
US6889937B2 (en) * | 1999-11-18 | 2005-05-10 | Rocky Mountain Composites, Inc. | Single piece co-cure composite wing |
US7681835B2 (en) * | 1999-11-18 | 2010-03-23 | Rocky Mountain Composites, Inc. | Single piece co-cure composite wing |
US20030186038A1 (en) * | 1999-11-18 | 2003-10-02 | Ashton Larry J. | Multi orientation composite material impregnated with non-liquid resin |
DE60018455T3 (de) * | 1999-12-07 | 2009-02-19 | The Boeing Company, Seattle | Doppelfolien vakuuminjektionsverfahren zur herstellung eines verbundwerkstoffes und damit hergestellter verbundwerkstoff |
CZ289591B6 (cs) * | 2000-06-06 | 2002-02-13 | ©Koda Ts A.S. | Komora vulkanizačního lisu |
US20030183331A1 (en) * | 2002-03-26 | 2003-10-02 | Ciambrone David F. | System and method for vacuum bag fabrication |
US7100656B2 (en) * | 2002-04-15 | 2006-09-05 | Northrop Grumman Corporation | System and method for curing composite material |
US7204951B2 (en) * | 2002-07-30 | 2007-04-17 | Rocky Mountain Composites, Inc. | Method of assembling a single piece co-cured structure |
US6896841B2 (en) * | 2003-03-20 | 2005-05-24 | The Boeing Company | Molding process and apparatus for producing unified composite structures |
US6991449B1 (en) * | 2003-04-11 | 2006-01-31 | Northrop Grumman Corporation | Heating apparatus for in-situ de-bulking composite parts during layup |
US7249943B2 (en) * | 2003-08-01 | 2007-07-31 | Alliant Techsystems Inc. | Apparatus for forming composite stiffeners and reinforcing structures |
CN100363546C (zh) * | 2003-11-12 | 2008-01-23 | 清华大学 | 一种适用于纤维复合材料及其夹层结构缝合的方法 |
US20050126699A1 (en) * | 2003-12-15 | 2005-06-16 | Anna Yen | Process for the manufacture of composite structures |
US8790485B2 (en) * | 2005-02-25 | 2014-07-29 | Bell Helicopter Textron Inc. | Single vacuum debulk composite panel repair |
US8066503B2 (en) * | 2005-10-25 | 2011-11-29 | The Boeing Company | Controlled delta pressure bulk resin infusion system |
US7842209B2 (en) * | 2006-02-21 | 2010-11-30 | The Boeing Company | Vacuum debulk and radiation cure method |
US7857925B2 (en) * | 2007-06-15 | 2010-12-28 | The Boeing Company | Process development protocol and vacuum bag process for carbon-epoxy prepreg |
FR2921295A1 (fr) * | 2007-09-24 | 2009-03-27 | Airbus France Sas | Dispositif pour la fabrication d'une piece en materiau composite integrant un systeme de drainage |
US20110039057A1 (en) * | 2009-08-17 | 2011-02-17 | The Boeing Company | Laminated composite rod and fabrication method |
US9662841B2 (en) | 2009-11-10 | 2017-05-30 | Orbital Atk, Inc. | Radially extending composite structures |
US8282757B2 (en) | 2009-11-10 | 2012-10-09 | Alliant Techsystems Inc. | Automated composite annular structure forming |
US20110146906A1 (en) * | 2009-12-18 | 2011-06-23 | The Boeing Company | Double Vacuum Cure Processing of Composite Parts |
JP5686997B2 (ja) * | 2010-07-15 | 2015-03-18 | 三菱重工業株式会社 | 樹脂基複合材の製造方法 |
US8986479B2 (en) * | 2010-09-30 | 2015-03-24 | The Boeing Company | Systems and methods for on-aircraft composite repair using double vacuum debulking |
US8262841B2 (en) | 2010-11-24 | 2012-09-11 | The Boeing Company | Methods for void-free debulking of adhesive bonded joints |
US8628639B2 (en) * | 2011-05-28 | 2014-01-14 | The Boeing Company | Vacuum bag processing using dual seals |
CN102514209B (zh) * | 2012-01-10 | 2014-08-06 | 保定华翼风电叶片研究开发有限公司 | 一种消泡方法及消泡装置 |
US20140083609A1 (en) * | 2012-09-27 | 2014-03-27 | General Electric Company | Method and apparatus for evacuation of large composite structures |
US9427943B2 (en) | 2013-03-15 | 2016-08-30 | Henkel IP & Holding GmbH | Prepreg curing process for preparing composites having superior surface finish and high fiber consolidation |
EP2862701B1 (en) * | 2013-10-15 | 2020-04-08 | AIRBUS HELICOPTERS DEUTSCHLAND GmbH | Molding device |
US10222353B2 (en) | 2015-03-18 | 2019-03-05 | The Boeing Company | Method and assembly for inspecting a partially cured repair patch prior to installation |
FR3041030B1 (fr) * | 2015-09-14 | 2017-10-06 | Snecma | Dispositif de chauffage d'une zone donnee d'une piece |
US9994009B2 (en) | 2015-11-09 | 2018-06-12 | The Boeing Company | Inverted double dome double vacuum debulk tool |
US10889073B2 (en) * | 2017-03-13 | 2021-01-12 | The Boeing Company | Controllable multi-celled bladders for composites |
WO2018203154A1 (en) * | 2017-05-01 | 2018-11-08 | Elaheh Ahmadloo | Toughening of laminated composites by nanofiber yarn |
DE102018121012A1 (de) * | 2018-08-28 | 2020-03-05 | Alzchem Trostberg Gmbh | Verfahren zur Herstellung eines Druckgasbehälters |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52109568A (en) * | 1976-03-10 | 1977-09-13 | Nasa | Method of manufacture of plyplate consisted of graphite and epoxy resin * from ultraathin films |
JPS5312964A (en) * | 1976-07-22 | 1978-02-06 | Mitsubishi Rayon Co | Method of formation of composite material and formed product thereof |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1211487A (en) * | 1916-07-07 | 1917-01-09 | Rubber Regenerating Co | Method of treating sheets of vulcanizable plastics. |
US1335124A (en) * | 1919-05-20 | 1920-03-30 | Fisk Rubber Co | Method and machine for removing air from rubber articles |
US3202561A (en) * | 1961-03-30 | 1965-08-24 | Johns Manville | Method for making acoustical tile with thermoplastic film covering |
GB1081911A (en) * | 1964-02-19 | 1967-09-06 | English Electric Co Ltd | Improvements in or relating to reinforced plastics |
US3661675A (en) * | 1968-10-30 | 1972-05-09 | Gen Dynamics Corp | Method of using polyethylene terephthalate as a bonding adhesive |
US3769132A (en) * | 1969-11-06 | 1973-10-30 | High Voltage Engineering Corp | Method of intimately bonding thermoplastics |
GB1441919A (en) * | 1972-07-26 | 1976-07-07 | Hawker Siddeley Aviation Ltd | Production of fibre reinforced synthetic resin articles |
GB1531481A (en) * | 1976-01-02 | 1978-11-08 | Hawker Siddeley Aviation Ltd | Production of fibre-reinforced synthetic resin articles |
-
1979
- 1979-05-21 US US06/040,799 patent/US4357193A/en not_active Expired - Lifetime
-
1980
- 1980-04-28 GB GB810703A patent/GB2062542B/en not_active Expired
- 1980-04-28 JP JP55501278A patent/JPS649923B2/ja not_active Expired
- 1980-04-28 DE DE8080901094T patent/DE3071193D1/de not_active Expired
- 1980-04-28 WO PCT/US1980/000490 patent/WO1980002528A1/en active IP Right Grant
- 1980-05-07 IT IT48611/80A patent/IT1143094B/it active
- 1980-05-09 CA CA000351572A patent/CA1146457A/en not_active Expired
- 1980-05-20 BE BE0/200677A patent/BE883380A/fr not_active IP Right Cessation
- 1980-12-01 EP EP80901094A patent/EP0028637B1/en not_active Expired
-
1981
- 1981-01-19 SE SE8100264A patent/SE429419B/sv not_active IP Right Cessation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52109568A (en) * | 1976-03-10 | 1977-09-13 | Nasa | Method of manufacture of plyplate consisted of graphite and epoxy resin * from ultraathin films |
JPS5312964A (en) * | 1976-07-22 | 1978-02-06 | Mitsubishi Rayon Co | Method of formation of composite material and formed product thereof |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003513110A (ja) * | 1998-05-20 | 2003-04-08 | サイテック テクノロジー コーポレーション | 空隙のない積層品の製造およびその使用法 |
JP2014051093A (ja) * | 2012-08-31 | 2014-03-20 | Boeing Co | 複合構造体の空隙率を低減するための方法およびシステム |
JP2016510087A (ja) * | 2013-03-15 | 2016-04-04 | ヘンケル アイピー アンド ホールディング ゲゼルシャフト ミット ベシュレンクテル ハフツング | 優れた表面仕上げおよび高い繊維圧密を有する複合材料を調製するためのプレプレグ硬化方法 |
JP2018062669A (ja) * | 2013-03-15 | 2018-04-19 | ヘンケル アイピー アンド ホールディング ゲゼルシャフト ミット ベシュレンクテル ハフツング | 優れた表面仕上げおよび高い繊維圧密を有する複合材料を調製するためのプレプレグ硬化方法 |
Also Published As
Publication number | Publication date |
---|---|
BE883380A (fr) | 1980-09-15 |
EP0028637A1 (en) | 1981-05-20 |
SE429419B (sv) | 1983-09-05 |
IT8048611A0 (it) | 1980-05-07 |
JPS649923B2 (ja) | 1989-02-20 |
IT1143094B (it) | 1986-10-22 |
CA1146457A (en) | 1983-05-17 |
DE3071193D1 (en) | 1985-11-28 |
EP0028637B1 (en) | 1985-10-23 |
WO1980002528A1 (en) | 1980-11-27 |
GB2062542B (en) | 1984-02-01 |
GB2062542A (en) | 1981-05-28 |
US4357193A (en) | 1982-11-02 |
SE8100264L (sv) | 1981-01-19 |
EP0028637A4 (en) | 1983-02-09 |