EP0001842A1 - Air humidifier - Google Patents

Air humidifier Download PDF

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Publication number
EP0001842A1
EP0001842A1 EP78101314A EP78101314A EP0001842A1 EP 0001842 A1 EP0001842 A1 EP 0001842A1 EP 78101314 A EP78101314 A EP 78101314A EP 78101314 A EP78101314 A EP 78101314A EP 0001842 A1 EP0001842 A1 EP 0001842A1
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EP
European Patent Office
Prior art keywords
container
heating device
housing
humidifier
humidifier according
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
EP78101314A
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German (de)
French (fr)
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EP0001842B1 (en
Inventor
Max Wunderlin
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.)
TURMIX AG
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TURMIX AG
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Filing date
Publication date
Application filed by TURMIX AG filed Critical TURMIX AG
Publication of EP0001842A1 publication Critical patent/EP0001842A1/en
Application granted granted Critical
Publication of EP0001842B1 publication Critical patent/EP0001842B1/en
Expired legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F6/00—Air-humidification, e.g. cooling by humidification
    • F24F6/02—Air-humidification, e.g. cooling by humidification by evaporation of water in the air
    • F24F6/025—Air-humidification, e.g. cooling by humidification by evaporation of water in the air using electrical heating means

Definitions

  • the invention relates to a humidifier with an electrical heating device and a container for receiving the water to be evaporated by means of the heating device and with a housing surrounding the container at a distance and consisting of a jacket and a base.
  • the water tank is made of metal, since this material can withstand the heating that occurs during operation of the humidifier most permanently and is also resistant to hydrolysis, while other material has not yet proven suitable.
  • the process known as hydrolose in which the water split to a small part of the ions reacts with substances dissolved in it to form an acid, becomes more intense with increasing temperature, which must be taken into account in a humidifier because of the constant heating of the water when selecting the material. Due to the water container becoming hot, the humidifier must also have an insulating outer housing that provides protection when the humidifier is touched and also allows it to be transported during operation.
  • the housing is primarily made of plastic material with known humidifiers, since this material g as a poor conductor of heat good insulation intrinsically owns. Since there is also an air layer between the water tank and the housing, the housing does not heat up excessively and can be touched safely.
  • the aim of the present invention is to simplify the manufacture of a humidifier of the type described and to make it more economical, which is possible if a few parts have to be assembled from different materials.
  • the above-mentioned aim can be achieved according to the invention by the fact that the humidifier initially has mentioned type of casing and the container closed at the bottom or having a bottom recess covered by the heating device are integrally formed and consist of plastic material and that the heating device is resiliently attached to the tank bottom.
  • the bottom of the container made of plastic material can expand to a different extent than the heating device during the heating that occurs during operation.
  • the housing jacket and the container form a cylindrical double-walled ring body, on the upper edge of which the housing jacket and the container are integrally connected. Furthermore, projections which are integrally formed with this can be expediently arranged on the bottom underside of the container for the purpose of fastening a housing base at a distance from the container bottom.
  • the housing jacket and the container made of polypropylene and form a plastic injection molded part.
  • This humidifier has the advantage that fewer parts have to be put together during manufacture and, as was previously the case with a metal water tank, it is not necessary to take into account different expansion coefficients of the materials, so that there is an overall significant weight Cost savings result.
  • the air humidifier has a housing jacket 10 and a water container 11 which is integrally connected to it, which together form a cylindrical, double-walled ring body, on the upper edge 12 of which the housing jacket 10 and the container 11 are integrally connected.
  • the container 11 also has a circularly delimited recess 13 on the bottom, which is covered by a circular heating device 14 in outline, so that this heating device forms part of the bottom of the container. Since the water container 11 forms a part reduced to a ring due to the bottom recess 13, there is a favorable shape for the production of the double-walled ring body consisting of the casing 10 and water container 11 as a plastic injection molded part.
  • Polypropylene is used as the plastic material, which material is resistant to hydrolysis even at high water temperatures and also has an optically good appearance. In addition, this material is not statically charged, so that it does not attract dust and dirt. In addition, this material has good fluidity during processing in an injection mold. Of course, it is also possible to design the water container 11 with a closed bottom and to arrange the heating device 14 above this bottom.
  • the ring body is simultaneously formed on the bottom underside of the container with the protrusions 15, which are formed in one piece and are arranged radially outside the base recess 13 provided in the middle and are used for this purpose, at a distance from the bottom of the water tank 11 to attach a housing base 16.
  • the housing jacket 10 and the water tank 11, which are connected to one another at the upper edge at 12, and the projections 15 on the underside of the tank bottom consist of an injection molded part.
  • the heating device 14 rests on an annular seal 20 at the edge of the bottom recess 13, at which edge the heating device is clamped by means of a plate 21 screwed against the underside of the container, a compensating ring consisting of rubber still being located between this plate and the underside of the container bottom 22 is located. With the help of the two rings, the heating device is attached to the bottom of the container in a floating manner, so that the bottom of the container can expand as a result of the heating that occurs during operation.
  • the heating device 14 consists of a heating head 23 with raised ribs, in which heating head a circular cross-section heating element 24 is embedded, to which the electrical connection cable 25 is connected.

Abstract

1. Air humidifier with an electrical heating device and a container for receiving water to be evaporated by the heating device and with a housing which spacedly surrounds the container and which consists of a jacket and a base, characterised in that the jacket (10) of the housing and the water container (11) are of one piece with one another and are made of a plastics material, the water container being closed at the base or having a recess (13) in the base that is covered by the heating device (e.g. 14), and that the heating device (14) is yieldingly secured at the base of the container.

Description

Die Erfindung betrifft einen Luftbefeuchter mit einer elektrischen Heizvorrichtung und einem Behälter zur Aufnahme des mittels der Heizvorrichtung zu verdampfenden Wassers und mit einem den Behälter im Abstand umgebenden, aus einem Mantel und einem Boden bestehenden Gehäuse.The invention relates to a humidifier with an electrical heating device and a container for receiving the water to be evaporated by means of the heating device and with a housing surrounding the container at a distance and consisting of a jacket and a base.

Bei bekannten Luftbefeuchtern dieser Art besteht der Wasserbehälter aus Metall, da dieser Werkstoff der bei Betrieb des Luftbefeuchters auftretenden Erhitzung am dauerhaftesten widersteht und auch hydrolysebeständig ist, während anderes Material sich hierfür noch nicht als geeignet erwiesen hat. Der als Hydrolose bezeichnete Vorgang,bei dem das zu einem kleinen Teil der Ionen gespaltene Wasser mit darin gelösten Stoffen unter Bildung einer Säure reagiert, wird mit zunehmender Temperatur intensiver, was bei einem Luftbefeuchter wegen der ständigen Erhitzung des Wassers bei der Materialauswahl zu berücksichtigen ist. Wegen des heiss werdenden Wasserbehälters muss der Luftbefeuchter auch ein isolierendes äusseres Gehäuse besitzen, das einen Schutz bei Berührung des Luftbefeuchters beildet und ihn auch während des Betriebs zu transportieren erlaubt.In known humidifiers of this type, the water tank is made of metal, since this material can withstand the heating that occurs during operation of the humidifier most permanently and is also resistant to hydrolysis, while other material has not yet proven suitable. The process known as hydrolose, in which the water split to a small part of the ions reacts with substances dissolved in it to form an acid, becomes more intense with increasing temperature, which must be taken into account in a humidifier because of the constant heating of the water when selecting the material. Due to the water container becoming hot, the humidifier must also have an insulating outer housing that provides protection when the humidifier is touched and also allows it to be transported during operation.

Das Gehäuse wird bei bekannten Luftbefeuchtern vorwiegend aus Kunststoffmaterial gefertigt, da dieses Material als schlechter Wärmeleiter gute Isolierunggeigenschaften besitzt. Da sich ausserdem noch zwischen dem Wasserbehälter und dem Gehäuse eine Luftschicht befindet, erwärmt sich das Gehäuse nicht übermässig und kann gefahrlos berührt werden.The housing is primarily made of plastic material with known humidifiers, since this material g as a poor conductor of heat good insulation intrinsically owns. Since there is also an air layer between the water tank and the housing, the housing does not heat up excessively and can be touched safely.

Die vorliegende Erfindung verfolgt das Ziel, die Herstellung eines Luftbefeuchters der beschriebenen Art zu vereinfachen und kostengünstiger zu gestalten, was möglich ist, wenn wenige Teile aus verschiedenen Materialien zusammengebaut werden müssen.The aim of the present invention is to simplify the manufacture of a humidifier of the type described and to make it more economical, which is possible if a few parts have to be assembled from different materials.

Nachdem Kunststoffmaterial entwickelt worden ist, das hydrolysebeständig ist und das ohne eine Verstärkung aus Glasfasern oder ähnlichen Stoffen zu benötigen die nötwendige Festigkeit und ferner auch noch ein optisch gutes Aussehen besitzt, lässt sich das vorstehend genannte Ziel erfindungsgemäss dadurch erreichen, dass bei dem Luftbefeuchter der eingangs genannten Art der Gehäusemantel und der an Boden geschlossene oder eine durch die Heizvorrichtung abgedeckte Bodenaussparung aufweisende Behälter einstückig ausgebildet sind und aus Kunststoffmaterial bestehen und dass die Heizvorrichtung am Behälterboden nachgiebig befestigt ist.After plastic material has been developed that is resistant to hydrolysis and that has the necessary strength and also has an optically good appearance without the need for reinforcement made of glass fibers or similar materials, the above-mentioned aim can be achieved according to the invention by the fact that the humidifier initially has mentioned type of casing and the container closed at the bottom or having a bottom recess covered by the heating device are integrally formed and consist of plastic material and that the heating device is resiliently attached to the tank bottom.

Aufgrund dieser Nachgiebigen Befestigung kann sich der Boden des aus Kunststoffmaterial bestehenden Behälters bei der im Betrieb auftretenden Erhitzung in anderem Ausmass ausdehnen als die Heizvorrichtung.Due to this resilient attachment, the bottom of the container made of plastic material can expand to a different extent than the heating device during the heating that occurs during operation.

In zweckmässiger Ausgestaltung bilden der Gehäusemantel und der Behälter einen zylindrischen doppelwandigen Ringkörper, an dessen oberem Rand der Gehäusemantel und der Behälter einstückig verbunden sind. Ferner können zweckmässig an der Bodenunterseite des Behälters mit diesem einstückig susgebildete Vorsprünge angeordnet sein zwecks Befestigung eines Gehäusebodens im Abstand vom Behälterboden. Vorzugsweise bestehen der Gehäusemantel und der Behälter aus Polypropylen und bilden ein Kunststoff-Spritzgussteil.In an expedient embodiment, the housing jacket and the container form a cylindrical double-walled ring body, on the upper edge of which the housing jacket and the container are integrally connected. Furthermore, projections which are integrally formed with this can be expediently arranged on the bottom underside of the container for the purpose of fastening a housing base at a distance from the container bottom. Preferably, the housing jacket and the container made of polypropylene and form a plastic injection molded part.

Dieser Luftbefeuchter besitzt den Vorteil, dass man bei der Herstellung weniger Teile zusammensetzen muss und dabei auch nicht, wie es bisher bei einem aus Metall bestehenden Wasserbehälter der Fall war, unterschiedliche Ausdehnungskoeffizienten der Materialien zu berücksichtig gen hat, so dass sich insgesamt eine ins Gewicht fallende Kosteneinsparung ergibt.This humidifier has the advantage that fewer parts have to be put together during manufacture and, as was previously the case with a metal water tank, it is not necessary to take into account different expansion coefficients of the materials, so that there is an overall significant weight Cost savings result.

Weitere Einzelheiten und Vorteile ergeben sich aus der nachstehenden Beschreibung und der Zeichnung, in welcher eine Ausführungsform des Erfindungsgegenstandes rein beispielsweise dargestellt ist. Die Zeichnung zeigt einen Vertikalschnitt durch den Luftbefeuchter.Further details and advantages result from the following description and the drawing, in which an embodiment of the subject matter of the invention is shown purely by way of example. The drawing shows a vertical section through the humidifier.

Der Luftbefeuchter weist einen Gehäusemantel 10 und einen einstückig mit diesem verbundenen Wasserbehälter 11 auf, die zusammen einen zylindrischen, doppelwandigen Ringkörper bilden, an dessen oberem Rand 12 der Gehäusemantel 10 und der Behälter 11 einstückig verbunden sind. Der Behälter 11 besitzt ferner am Boden eine kreisförmig umgrenzte Aussparung 13, die durch eine im Umriss kreisförmige Heizvorrichtung 14 abgedeckt ist, so dass diese Heizvorrichtung einen Teil des Behälterbodens bildet. Da der Wasserbehälter 11 aufgrund der Bodenaussparung 13 einen auf einen Ring reduzierten Teil bildet, ergibt sich eine günstige Form für die Herstellung des doppelwandigen, aus Gehäusemantel 10 und Wasserbehälter 11 bestehenden Ringkörpers als Kunststoff-Spritzgussteil. Als Kunststoffmaterial wird-Polypropylen verwendet, welches Material auch bei hoher Wassertemperatur hydrolysenbeständig ist und ausserdem ein optisch gutes Aussehen besitzt. Ausserdem wird dieses Material nicht statisch aufgeladen, so dass es nicht Staub- und Schmutzteile anzieht. Ausserdem besitzt dieses Material eine gute Fliessfähigkeit während der Verarbeitung in einem Spritzgusswerkzeug. Natürlich ist es auch möglich, den Wasserbehälter 11 mit geschlossenem Boden auszubilden und die Heizvorrichtung 14 über diesem Boden anzuordnen.The air humidifier has a housing jacket 10 and a water container 11 which is integrally connected to it, which together form a cylindrical, double-walled ring body, on the upper edge 12 of which the housing jacket 10 and the container 11 are integrally connected. The container 11 also has a circularly delimited recess 13 on the bottom, which is covered by a circular heating device 14 in outline, so that this heating device forms part of the bottom of the container. Since the water container 11 forms a part reduced to a ring due to the bottom recess 13, there is a favorable shape for the production of the double-walled ring body consisting of the casing 10 and water container 11 as a plastic injection molded part. Polypropylene is used as the plastic material, which material is resistant to hydrolysis even at high water temperatures and also has an optically good appearance. In addition, this material is not statically charged, so that it does not attract dust and dirt. In addition, this material has good fluidity during processing in an injection mold. Of course, it is also possible to design the water container 11 with a closed bottom and to arrange the heating device 14 above this bottom.

Bei der Herstellung des aus Gehäusemantel 10 und Wasserbehälter 11 bestehenden Ringkörpers werden gleichzeitig noch an der Bodenunterseite des Behälters mit diesem einstückig ausgebildete Vorsprünge 15 angeformt, die radial ausserhalb der auf der Mitte vorgesehenen Bodenaussparung 13 umfangsmässig verteilt angeordnet sind und dazu dienen, im Abstand vom Boden des Wasserbehälters 11 einen Gehäuseboden 16 zu befestigen. Demnach bestehen der Gehäusemantel 10 und der Wasserbehälter 11, die am oberen Rand bei 12 einstückig.miteinander verbunden sind, sowie die Vorsprünge 15 an der Unterseite des Behälterbodens aus einem Spritzgussteil. Auf dem oberen Rand 12 dieses Spritzgussteils liegt ein Deckel 17, der zwischen ringförmigen Stegen 18, die durch in der Zeichnung nicht erkennbare radial verlaufende Rippen untereinander verbunden sind, Austrittsöffnungen 19 für den Wasserdampf aufweist.In the manufacture of the casing 10 and the water container 11, the ring body is simultaneously formed on the bottom underside of the container with the protrusions 15, which are formed in one piece and are arranged radially outside the base recess 13 provided in the middle and are used for this purpose, at a distance from the bottom of the water tank 11 to attach a housing base 16. Accordingly, the housing jacket 10 and the water tank 11, which are connected to one another at the upper edge at 12, and the projections 15 on the underside of the tank bottom consist of an injection molded part. On the upper edge 12 of this injection molded part there is a cover 17 which has outlet openings 19 for the water vapor between annular webs 18, which are connected to one another by radially extending ribs which cannot be seen in the drawing.

Die Heizvorrichtung 14 ruht auf einer ringförmigen Dichtung 20 am Rand der Bcdenaussparung 13, an welchem Rand die Heizvorrichtung mittels einer von der Behälter-unterseite gegengeschraubten Platte 21 festgeklemmt ist, wobei sich zwischen dieser Platte und der Behälterbodenunterseite noch ein aus Gummi bestehender Ausgleichsring 22 befindet. Mit Hilfe der beiden Ringe ist die Heizvorrichtung am Behälterboden schwimmend befestigt, so dass der Behälterboden sich infolge der beim Betrieb auftretenden Erhitzung ausdehnen kann.The heating device 14 rests on an annular seal 20 at the edge of the bottom recess 13, at which edge the heating device is clamped by means of a plate 21 screwed against the underside of the container, a compensating ring consisting of rubber still being located between this plate and the underside of the container bottom 22 is located. With the help of the two rings, the heating device is attached to the bottom of the container in a floating manner, so that the bottom of the container can expand as a result of the heating that occurs during operation.

Die Heizvorrichtung 14 besteht aus einem Heizkopf 23 mit hochstehenden Rippen, in welchem Heizkopf ein kreisförmigen Querschnitt aufweisendes Heizelement 24 eingebettet ist, mit welchem das elektrische Anschlüsskabel 25 verbunden ist.The heating device 14 consists of a heating head 23 with raised ribs, in which heating head a circular cross-section heating element 24 is embedded, to which the electrical connection cable 25 is connected.

Claims (6)

1. Luftbefeuchter mit einer elektrischen Heizvorrichtung und einem Behälter zur Aufnahme des mittels der Heizvorrichtung zu verdampfenden Wassers und mit einem den Behälter im Abstand umgebenden, aus einem Mantel und einem Boden bestehenden Gehäuse, dadurch gekennzeichnet, dass der Gehäusemantel (10) und der am Boden geschlossene oder eine durch die Heizvorrichtung abgedeckte Bodenaussparung (13) aufweisende Wasserbehälter (11) einstükig ausgebildet sind und aus Kunststoffmaterial bestehen und dass die Heizvorrichtung am Behälterboden nachgiebig befestigt ist.1. Humidifier with an electrical heating device and a container for receiving the water to be evaporated by means of the heating device and with a housing surrounding the container at a distance, consisting of a casing and a bottom, characterized in that the housing jacket (10) and the bottom Water tanks (11) which are closed or have a bottom recess (13) covered by the heating device are formed in one piece and consist of plastic material and that the heating device is flexibly attached to the tank bottom. 2. Luftbefeuchter nach Anspruch 1, dadurch gekennzeichnet, dass der Gehäusemantel (10) und der Behälter (11) einen zylindrischen, doppelwandigen Ringkörper (10, 11) bilden, an dessen oberem Rand (12) der Gehäusemantel und der Behälter einstückig verbunden sind.2. Humidifier according to claim 1, characterized in that the housing jacket (10) and the container (11) form a cylindrical, double-walled ring body (10, 11), on the upper edge (12) of the housing jacket and the container are integrally connected. 3. Luftbefeuchter nach Anspruch 1, dadurch gekennzeichnet, dass an der Bodenunterseite des Behälters (11) mit diesem einstückig ausgebildete Vorsprünge (15) für die Befestigung eines Gehäusebodens (16) angeordnet sind.3. Humidifier according to claim 1, characterized in that on the bottom underside of the container (11) with this integrally formed projections (15) for the attachment of a housing base (16) are arranged. 4. Luftbefeuchter nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, dass der Gehäusemantel (10) und der Behälter (11) aus Polypropylen bestehen.4. Humidifier according to claims 1 to 3, characterized in that the housing jacket (10) and the container (11) consist of polypropylene. 5. Luftbefeuchter nach den Ansprüchen 1 bis 4, dadurch gekennzeichnet, dass der Gehäusemantel (10) und der Behälter (11) aus einem Kunststoff-Spritzgussteil bestehen.5. Humidifier according to claims 1 to 4, characterized in that the housing jacket (10) and the container (11) consist of a plastic injection molded part. 6. Luftbefeuchter nach Anspruch 1, dadurch gekennzeichnet, dass zwischen der Heizvorrichtung (14) und dem Boden des Behälters (11) eine ringförmige Dichtung (20) angeordnet ist, und dass die Heizvorrichtung mittels einer die Bodenaussparung (13) von der Behälter-Unterseite abdeckenden und mit der Heizvorrichtung verschraubten Platte (21), die gegen einen zwischen der Behälterbodenunterseite und der Platte angeordneten elastischen Ausgleichsring (22) anliegt, am Rand der im Behälterboden vorgesehenen Bodenaussparung (13) befestigt ist.6. Humidifier according to claim 1, characterized in that an annular seal (20) is arranged between the heating device (14) and the bottom of the container (11), and that the heating device by means of a bottom recess (13) from the bottom of the container Covering plate and screwed to the heating device, which rests against an elastic compensation ring (22) arranged between the underside of the container bottom and the plate, is fastened to the edge of the bottom recess (13) provided in the container bottom.
EP19780101314 1977-11-08 1978-11-04 Air humidifier Expired EP0001842B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH13575/77 1977-11-08
CH1357577A CH622604A5 (en) 1977-11-08 1977-11-08

Publications (2)

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EP0001842A1 true EP0001842A1 (en) 1979-05-16
EP0001842B1 EP0001842B1 (en) 1980-07-23

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EP19780101314 Expired EP0001842B1 (en) 1977-11-08 1978-11-04 Air humidifier

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AT (1) AT378256B (en)
CH (1) CH622604A5 (en)
DE (1) DE2860099D1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1982000344A1 (en) * 1980-07-14 1982-02-04 Cech P Device for the exchange of cold and heat,procedure for its manufacture and range of application for the same
DE3106271A1 (en) * 1981-02-20 1982-09-09 Alfons 7800 Freiburg Günther Electrically heated air humidifier
WO1995033162A1 (en) * 1994-05-26 1995-12-07 Reburg Patentverwertungs Gmbh Air conditioning module

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2103844A (en) * 1935-12-23 1937-12-28 Arthur W Conley Air conditioning device
DE1918512A1 (en) * 1968-04-25 1969-11-27 Hans Badertscher Water evaporator
DE1778798B1 (en) * 1967-06-16 1971-12-16 Turmix Ag Electric humidifier secured against overload
US3705415A (en) * 1971-02-08 1972-12-05 Lawrence Katzman Vaporizer bowl construction
DE2356040B1 (en) * 1973-11-09 1975-03-06 Luftbefeuchtung Gmbh, 6700 Ludwigshafen Evaporation humidifier

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2103844A (en) * 1935-12-23 1937-12-28 Arthur W Conley Air conditioning device
DE1778798B1 (en) * 1967-06-16 1971-12-16 Turmix Ag Electric humidifier secured against overload
DE1918512A1 (en) * 1968-04-25 1969-11-27 Hans Badertscher Water evaporator
US3705415A (en) * 1971-02-08 1972-12-05 Lawrence Katzman Vaporizer bowl construction
DE2356040B1 (en) * 1973-11-09 1975-03-06 Luftbefeuchtung Gmbh, 6700 Ludwigshafen Evaporation humidifier

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1982000344A1 (en) * 1980-07-14 1982-02-04 Cech P Device for the exchange of cold and heat,procedure for its manufacture and range of application for the same
DE3106271A1 (en) * 1981-02-20 1982-09-09 Alfons 7800 Freiburg Günther Electrically heated air humidifier
WO1995033162A1 (en) * 1994-05-26 1995-12-07 Reburg Patentverwertungs Gmbh Air conditioning module

Also Published As

Publication number Publication date
CH622604A5 (en) 1981-04-15
AT378256B (en) 1985-07-10
ATA791778A (en) 1984-11-15
DE2860099D1 (en) 1980-11-13
EP0001842B1 (en) 1980-07-23

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