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EP0003790A1 - Dispositif pour enduire une feuille en mouvement - Google Patents

Dispositif pour enduire une feuille en mouvement Download PDF

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Publication number
EP0003790A1
EP0003790A1 EP79100404A EP79100404A EP0003790A1 EP 0003790 A1 EP0003790 A1 EP 0003790A1 EP 79100404 A EP79100404 A EP 79100404A EP 79100404 A EP79100404 A EP 79100404A EP 0003790 A1 EP0003790 A1 EP 0003790A1
Authority
EP
European Patent Office
Prior art keywords
web
coating
pressure
roller
liquid
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
EP79100404A
Other languages
German (de)
English (en)
Other versions
EP0003790B1 (fr
Inventor
David John Pipkin
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of EP0003790A1 publication Critical patent/EP0003790A1/fr
Application granted granted Critical
Publication of EP0003790B1 publication Critical patent/EP0003790B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/40—Distributing applied liquids or other fluent materials by members moving relatively to surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
    • B05C11/023—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C3/00—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material
    • B05C3/18—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material only one side of the work coming into contact with the liquid or other fluent material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/02—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material to surfaces by single means not covered by groups B05C1/00 - B05C7/00, whether or not also using other means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/04—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material to opposite sides of the work

Definitions

  • the present invention relates to an apparatus and a method for coating a moving web with a coating liquid.
  • squeegees can be used to apply and control the coating on the base.
  • Rolls can also be used to apply coatings, either a single roll which is passed through a storage container with the coating liquid and applies the liquid directly to the support or a combination, for example by the support for controlling the coating through the gap between adjacent rolls to be led.
  • Coatings can also be directly extruded onto substrates in very thin layers.
  • the pads can be dipped into a reservoir of coating liquid, either by moving freely as a web or by being passed around a roll, and air cushions or elastic wipers can be used to remove the excess coating material from the pad.
  • US Pat. No. 3,688,738 describes a coating device in which a support in the form of a web is guided around a roller which is immersed in the coating liquid.
  • a wiper membrane which does not extend beyond the roll, is used to remove excess coating fluid from the backing and return it to the reservoir.
  • a statically arranged film is additionally used, which interacts with the stripping membrane.
  • it is generally not desirable to coat the pad to the brim. Excess coating material loosens from the edge of the underlay when it is transported on. It is also often desirable to leave an uncoated edge. Therefore, the simple device described in U.S. Patent No. 3,688,738 is limited to the manufacture of a certain type of coating and a certain manufacturing speed.
  • the object of the invention is to provide a device and a method for coating a base with which and with which a certain amount of coating liquid on a web in a desired layer thickness and width while obtaining a very smooth, uniform coating can be applied.
  • the coating width should be strictly limited to a desired width on the web to be coated.
  • the layer thickness should be easy to control and can be changed.
  • the procedure should be feasible in such a way that there is no need to return excess coating material to the storage container, and it should preferably be feasible as a continuous process.
  • materials with large differences in viscosity up to thixotropic materials in any layer thicknesses which can be thinner than those obtainable with conventional methods and can be applied at high coating speeds.
  • the object of the invention is achieved by a device and a coating method, which is characterized in the claims.
  • a coating device according to the present the invention is shown in Fig. 1 and is generally designated by the reference numeral 10.
  • the web 12 rests on the coating roll 14, which is rotatably arranged on an axis 15 and is driven at a certain speed.
  • the guide roller 18 brings the web 12 into contact with a substantial part of the surface of the coating roller 14.
  • Rollers 14 and 18 are conventional rolls that are common in processes for coating various substrates.
  • the web 12 consists in most cases of a conventional substrate, for example of biaxially oriented polyethylene terephthalate, which is available under the trademark Mylar, of acetates or polyolefins, or other conventional polymer films, paper and the like.
  • the smoothing film 20 is positioned substantially statically adjacent to a portion of the web 12 and extends over the periphery of the coating roll 14. Preferably, the smoothing film 20 extends over a majority of the web 12 as long as it is in contact with the coating roll 14 , but not very much beyond this contact area.
  • a pressure exerting device for example a deformable membrane 22, which is arranged on a core 23 and fastened to a carrier 24, brings the smoothing film 20 with the web 12 under a certain pressure, which is a function of the internal pressure of the membrane 22 in contact.
  • the carrier 24 allows the membrane 22 to move towards or away from the roller 14 in order to change the contact area with the same.
  • the line 26 is in communication with the interior of the membrane 22 and also with a pressure regulating device 28 through which a medium, preferably Air is fed into the interior of the membrane 22.
  • a medium preferably Air is fed into the interior of the membrane 22.
  • the metering pump 32 conveys liquid coating material from the feed line 34 to the metering line 36 at a certain speed so that there is a supply of liquid coating material at the point of contact of the web 12 with the smoothing film 20.
  • the metering pump 32 is driven by the belt 38, which is arranged on the pulley 39 of the metering pump 32 on the one hand and the pulley 40 of the guide roller 18 on the other hand.
  • the desired amount of liquid coating material is thus fed in depending on the speed of the guide roller 18.
  • the metering pump 32 can also be driven at a constant speed by an independent device (not shown).
  • the supply 37 of liquid coating material at the point of contact of the smoothing film 20 with the web 12 creates an easily controllable coating on the web 12, the pressure generated by the membrane 22, the thickness of the coating, and the metering rate being determined by the pump 32 determines the width of the coating.
  • a coated substrate 44 is obtained in which the liquid coating material is evenly distributed over the surface of the web 12 in a smooth and reproducible manner.
  • a number of outlet openings 36 may be provided above the surface of the web 12, whereby a plurality of coated strips can be produced on the web 12, which can later be divided into individual coated sections.
  • the supply amount 37 is controlled in such a way that spreading of the liquid coating material to the edge of the web is avoided, which facilitates working at high speed and edges of the desired width on the edge of the coating roller 14 are kept free of excess coating material.
  • Thixotropic liquid coating materials can easily be kept in a flowable state by the shear forces exerted by the material of the metering pump 32 and the web 12 at the supply point 37.
  • FIG. 2 Another embodiment of the invention is shown in FIG. 2. As shown, the pressure generating device in the form of a membrane 22 is attached to the end of a cylindrical core 23 '. As can also be seen from FIG. 2, an extrusion nozzle 45 is used instead of the metering line 36 in FIG. 1. The outlet opening 46 of the extrusion die 45 is arranged so that the liquid coating material is applied to the web 12 in such a way that it is not exposed to the air even for a short time. Although this is shown at an increased distance for clarity, the web 12 to the extrusion die 45 is arranged so that the contact point with the web 12 is effectively isolated from the external environment.
  • the liquid coating material that is extruded through the outlet opening 46 is contained between the web 12 and the surface of the extrusion die 45.
  • the smoothing film 20 is attached to the notch 47 of the extrusion die 45 and serves to act on the liquid coating material in the manner described in Fig. 1, without ever however, the coating material is exposed to air before the coating process is completed.
  • FIG. 3 Another embodiment of the coating device according to the invention is shown in FIG. 3 and is designated by the reference symbol 10 '.
  • the coating device 10 ' is the devices according to FIGS. 1 and 2 similar, except that the pressure is generated in a different way.
  • a pressure web 48 is arranged essentially statically on the guide rollers 50 and 51 in such a way that it is in contact with the web 12 over part of the surface of the coating roller 14.
  • the pressure web 48 terminates at the tension roller 53 and is attached thereto in such a way that a torque which is exerted on the tension roller 53 increases the tension in the pressure web 48 and consequently also the pressure with which the pressure web 48 presses against the coating roller 14 is pressed.
  • An arrangement for changing the torque that is exerted on the tensioning roller 53 for example a fixedly arranged torque generator 55, is provided in order to facilitate the setting of a specific tension of the pressure path 48.
  • the print web 48 can be made from a number of thin, flexible materials, such as polyester such as polyethylene terephthalate, rubber or other polymer films, metals, or even paper.
  • the smoothing film 20 is statically disposed between the print web 48 and the web 12 such that it contacts a portion of the web 12 that is in contact with the coating roll 14; however, it can also extend beyond the point of contact with the coating roller 14. As shown, the smoothing film 20 is on the guide roller 50 attached to the printing web, but other attachment options are possible. If an extrusion die 45, as shown in FIG. 2, is not used, the web 12 generally contacts the coating roll 14 prior to its contact with the smoothing film 20. This is necessary for the liquid coating material to dose through the metering line 36 into place where the web 12 and the smoothing film 20 meet. As previously indicated, the coating materials are carefully metered through metering line 36.
  • the metering pump 32 is preferably operated synchronously with the speed of the web 12, so that an increase in the linear speed of the web 12 is also associated with an increase in the metering capacity of the pump 32.
  • simplified metering devices for example a storage container with coating material, which exerts pressure on an easily adjustable valve; be used.
  • Other arrangements for the supply of the coating material are also possible, for example an extrusion die or a manifold (not shown) with many outlet openings, which ensures a more uniform distribution of the coating material over the web 12 and either a completely coated or a strip-coated web delivers.
  • the material to be applied can be applied directly to the smoothing film 20 in the vicinity of the point where it contacts the web 12. be applied.
  • the coating material is metered in the amounts actually required, so that no coating material returns must be led. Problems of the return of the coating material, for example coagulation, contamination, influences of the atmosphere and the like, are thereby completely avoided.
  • the web 12 is pressed in a high-pressure region against the coating roller 14 by the pressure which is exerted on the smoothing film 20 by the membrane 20 or the pressure web 48.
  • the pressure of the membrane 22 or the tension in the pressure web 48 and consequently the force with which the smoothing film 20 is pressed against the web 12 the thickness of the coating material that passes through this area can be easily adjusted.
  • the width of the coating is controlled at the same time by a fixed metering speed of the coating material. With an increased metering speed of the coating material, the width of the coating is simultaneously increased; and by changing the pressure of the membrane 20 or the tension of the web 48, the thickness can be easily adjusted.
  • these parameters can be easily monitored by controlling the delivery rate of the metering pump 32 or by the pressure generated by the device 28 or the torque exerted on the tensioning pulley 53 by the fixed torque producing motor 55 , be adjusted.
  • the motor 55 is operated so that it comes to a standstill when the desired train in the band 48 is reached.
  • the coating device advantageously allows the thickness and width of a coating to be controlled over a wide area on a moving web.
  • This result is obtained with no precise application provided metal edges or nozzles for layer thickness control, for example a doctor blade or an extrusion nozzle.
  • the coating liquid in the present invention does not have to be returned to a reservoir which would cause contamination, coagulation and the like, and that in most cases it does not touch any metallic parts. If desired, atmospheric influences on the coating liquid can be eliminated.
  • the smoothing film can easily be replaced. It is the only component of the coating apparatus that comes into contact with the coating material. Without having to rely on a precisely manufactured part that is subject to wear and tear, the coating process can be monitored according to the invention in a simple and economical manner by means of a carefully adjusted high-pressure area.

Landscapes

  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP79100404A 1978-02-23 1979-02-12 Dispositif pour enduire une feuille en mouvement Expired EP0003790B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US88228178A 1978-02-23 1978-02-23
US882281 1978-02-23

Publications (2)

Publication Number Publication Date
EP0003790A1 true EP0003790A1 (fr) 1979-09-05
EP0003790B1 EP0003790B1 (fr) 1983-09-07

Family

ID=25380260

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79100404A Expired EP0003790B1 (fr) 1978-02-23 1979-02-12 Dispositif pour enduire une feuille en mouvement

Country Status (5)

Country Link
US (1) US4327130A (fr)
EP (1) EP0003790B1 (fr)
JP (1) JPS54114546A (fr)
AT (1) AT359174B (fr)
DE (1) DE2966123D1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0056704A3 (en) * 1981-01-21 1982-09-22 Alcan International Limited Coating apparatus and process
EP0081032A1 (fr) * 1981-11-27 1983-06-15 International Business Machines Corporation Appareil pour revêtir une matière en feuille
EP0078552A3 (fr) * 1981-10-29 1984-09-05 International Business Machines Corporation Dispositif pour revêtir un substrat et procédé
WO1992010603A1 (fr) * 1990-12-06 1992-06-25 Eduard Küsters Maschinenfabrik GmbH & Co. KG Dispositif pour l'application d'un liquide de traitement sur une bande de matiere defilante, en particulier d'une bande textile
WO2003018210A1 (fr) 2001-08-27 2003-03-06 Japan Absorbent Technology Institute Machine a enduire pour dispersion a l'etat de boue
US7098519B2 (en) 2004-05-10 2006-08-29 Max-Planck-Gesellschaft Zur Forderung Der Wissenchafter E.V. Avalanche radiation detector
CN105499062B (zh) * 2005-11-24 2017-08-15 克诺普拉斯技术股份公司 用流动性涂层材料为光滑的或具有构造结构的表面涂层的涂层设备

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Publication number Priority date Publication date Assignee Title
US4532158A (en) * 1981-04-09 1985-07-30 St. Regis Paper Company Apparatus for and a method of metering of coating on a moving web
US4442788A (en) * 1982-09-30 1984-04-17 Foster Grant Corporation Continuous gradient dyeing of plastic ribbon
US4756856A (en) * 1984-12-20 1988-07-12 Polaroid Corporation Method of and apparatus for forming surface of magnetic media
WO1988001560A1 (fr) * 1986-08-28 1988-03-10 Erkki Rinne Procede et appareil d'enduction de materiaux thermoplastiques, de revetement d'objets et de fabrication d'objets profiles
JP2510530B2 (ja) * 1986-09-26 1996-06-26 東レ株式会社 複合膜の製造方法
JPH0342457A (ja) * 1989-07-07 1991-02-22 Toshiba Mach Co Ltd 並列テープ群の整列機構
US5573813A (en) * 1990-03-02 1996-11-12 Hexcel Corporation Method and apparatus for impregnating fibers with highly viscous materials and article made therewith
DE4022948A1 (de) * 1990-07-19 1992-01-23 Anlagen Und Maschinenbau Karl Vorrichtung zum auftragen eines behandlungsgutes auf eine warenbahn
FR2691482A1 (fr) * 1992-05-21 1993-11-26 Ferrari Tissage Enduction Serg Installation pour l'enduction double-face de tissus ou autres supports souples.
WO1994027739A1 (fr) * 1993-05-27 1994-12-08 Alcan International Limited Machine a revetir les deux faces de rubans et procede associe
US5514417A (en) * 1994-08-04 1996-05-07 Schuller International, Inc. Method of and apparatus for coating a molded fibrous workpiece
DE4446308C2 (de) * 1994-12-23 2000-10-26 Voith Sulzer Papiermasch Gmbh Vorrichtung zum Auftragen eines flüssigen oder pastösen Mediums auf eine laufende Materialbahn
WO1996026067A1 (fr) * 1995-02-21 1996-08-29 Serrot Corporation Membrane thermoplastique monolithique renforcee par des mailles de tissu
US5784197A (en) * 1996-04-01 1998-07-21 Minnesota Mining And Manufacturing Company Ultra-flexible retroreflective sheeting with coated back surface
US5754338A (en) * 1996-04-01 1998-05-19 Minnesota Mining And Manufacturing Company Structured retroreflective sheeting having a rivet-like connection
US5910858A (en) * 1996-04-01 1999-06-08 Minnesota Mining And Manufacturing Company Retroreflective sheeting with coated back surface
US5882796A (en) * 1996-04-01 1999-03-16 Minnesota Mining And Manufacturing Company Bonded structured retroreflective sheeting
AU6087498A (en) * 1997-03-24 1998-10-20 Solipat Ag Method and device for applying a flowable medium
CA2294434C (fr) 1997-06-27 2004-10-19 Alcan International Limited Procede et appareil de revetement d'articles en feuille ou en bande
AU2004203164B2 (en) * 2003-07-18 2009-09-24 Dominic Victor Costa Adhesive Applicator
KR101978284B1 (ko) 2010-04-20 2019-05-14 파이브라케스트 리미티드 형성된 시트 멤브레인 요소 및 여과 시스템
KR102015613B1 (ko) * 2011-10-20 2019-08-28 파이브라케스트 리미티드 성형 시이트 막 요소를 코팅하기 위한 코팅 기기 및 공정
US9718080B1 (en) * 2016-05-06 2017-08-01 RADCO Infusion Technologies, LLC Linear substrate infusion compartment

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GB837072A (en) * 1957-06-03 1960-06-09 Warren S D Co Improvements relating to the production of coated paper
US3081191A (en) * 1959-02-18 1963-03-12 Mead Corp Doctor blade
GB1101605A (en) * 1965-05-04 1968-01-31 English Clays Lovering Pochin Improvements in or relating to the coating of sheet material
DE1427601A1 (de) * 1961-09-06 1969-11-13 Black Clawson Co Auftragvorrichtung fuer Papiermaschinen
DE1652273A1 (de) * 1967-02-24 1970-05-14 Agfa Gevaert Ag Verfahren und Absaugesystem fuer Beschichtungsvorrichtungen zum Vermeiden der UEbertragung von Druckstoerungen auf den Beschichtungsvorgang
FR2078859A5 (fr) * 1970-02-21 1971-11-05 Jagenberg Werke Ag
US3688738A (en) * 1969-10-15 1972-09-05 Agfa Gevaert Ag Casting apparatus with flexible wiper film
US3882817A (en) * 1974-01-11 1975-05-13 Black Clawson Co Doctor Blade Assembly
DE2633111A1 (de) * 1976-07-23 1978-02-02 Basf Ag Vorrichtung zum auftragen einer beschichtungsmasse auf bandfoermige traegermaterialien

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US3889018A (en) * 1973-03-16 1975-06-10 Ethyl Corp Method of simultaneously coating the opposite sides of a paper web
SE424510B (sv) * 1975-08-26 1982-07-26 Inventing Ab Sett och anordning for dubbelsidig beleggning av en lopande bana
SE424509B (sv) * 1975-08-26 1982-07-26 Inventing Ab Sett och anordning for en dubbelsidig bladbestrykning av en lopande bana
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Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB837072A (en) * 1957-06-03 1960-06-09 Warren S D Co Improvements relating to the production of coated paper
US3081191A (en) * 1959-02-18 1963-03-12 Mead Corp Doctor blade
DE1427601A1 (de) * 1961-09-06 1969-11-13 Black Clawson Co Auftragvorrichtung fuer Papiermaschinen
GB1101605A (en) * 1965-05-04 1968-01-31 English Clays Lovering Pochin Improvements in or relating to the coating of sheet material
DE1652273A1 (de) * 1967-02-24 1970-05-14 Agfa Gevaert Ag Verfahren und Absaugesystem fuer Beschichtungsvorrichtungen zum Vermeiden der UEbertragung von Druckstoerungen auf den Beschichtungsvorgang
US3688738A (en) * 1969-10-15 1972-09-05 Agfa Gevaert Ag Casting apparatus with flexible wiper film
FR2078859A5 (fr) * 1970-02-21 1971-11-05 Jagenberg Werke Ag
US3882817A (en) * 1974-01-11 1975-05-13 Black Clawson Co Doctor Blade Assembly
DE2633111A1 (de) * 1976-07-23 1978-02-02 Basf Ag Vorrichtung zum auftragen einer beschichtungsmasse auf bandfoermige traegermaterialien

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0056704A3 (en) * 1981-01-21 1982-09-22 Alcan International Limited Coating apparatus and process
EP0078552A3 (fr) * 1981-10-29 1984-09-05 International Business Machines Corporation Dispositif pour revêtir un substrat et procédé
EP0081032A1 (fr) * 1981-11-27 1983-06-15 International Business Machines Corporation Appareil pour revêtir une matière en feuille
WO1992010603A1 (fr) * 1990-12-06 1992-06-25 Eduard Küsters Maschinenfabrik GmbH & Co. KG Dispositif pour l'application d'un liquide de traitement sur une bande de matiere defilante, en particulier d'une bande textile
US5367895A (en) * 1990-12-06 1994-11-29 Eduard Kusters Maschinenfabrik Gmbh & Co. Kg Device for applying a treatment liquid to a moving web of material, in particular a textile web
WO2003018210A1 (fr) 2001-08-27 2003-03-06 Japan Absorbent Technology Institute Machine a enduire pour dispersion a l'etat de boue
EP1428581A4 (fr) * 2001-08-27 2009-04-01 Dsg Internat Ltd Machine a enduire pour dispersion a l'etat de boue
US7098519B2 (en) 2004-05-10 2006-08-29 Max-Planck-Gesellschaft Zur Forderung Der Wissenchafter E.V. Avalanche radiation detector
CN105499062B (zh) * 2005-11-24 2017-08-15 克诺普拉斯技术股份公司 用流动性涂层材料为光滑的或具有构造结构的表面涂层的涂层设备

Also Published As

Publication number Publication date
ATA99179A (de) 1980-03-15
US4327130A (en) 1982-04-27
JPS5515265B2 (fr) 1980-04-22
AT359174B (de) 1980-10-27
EP0003790B1 (fr) 1983-09-07
JPS54114546A (en) 1979-09-06
DE2966123D1 (en) 1983-10-13

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