EP0461363B1 - Lighting device for an oven - Google Patents

Lighting device for an oven Download PDF

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Publication number
EP0461363B1
EP0461363B1 EP91106144A EP91106144A EP0461363B1 EP 0461363 B1 EP0461363 B1 EP 0461363B1 EP 91106144 A EP91106144 A EP 91106144A EP 91106144 A EP91106144 A EP 91106144A EP 0461363 B1 EP0461363 B1 EP 0461363B1
Authority
EP
European Patent Office
Prior art keywords
cooking chamber
metallic
light source
baking oven
glass cover
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.)
Expired - Lifetime
Application number
EP91106144A
Other languages
German (de)
French (fr)
Other versions
EP0461363A2 (en
EP0461363A3 (en
Inventor
Rolf Dipl.-Ing. Salentin
Herbert Nachlinger
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.)
BOSCH-SIEMENS HAUSGERAETE GMBH
Original Assignee
Individual
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Filing date
Publication date
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Publication of EP0461363A2 publication Critical patent/EP0461363A2/en
Publication of EP0461363A3 publication Critical patent/EP0461363A3/en
Application granted granted Critical
Publication of EP0461363B1 publication Critical patent/EP0461363B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/6444—Aspects relating to lighting devices in the microwave cavity
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/76—Prevention of microwave leakage, e.g. door sealings
    • H05B6/766—Microwave radiation screens for windows

Definitions

  • the present invention relates to a lighting device for an oven, in particular for a domestic oven, in the cooking space of which microwave energy can be coupled in, using a light source which is arranged outside the cooking space.
  • the present invention has for its object to provide a lighting device which is arranged in addition to simple construction technology outside of the cooking space.
  • the lighting device according to the invention is characterized in that the glass cover has knobs on the cooking chamber side, which are connected to a surface perforated panel, so that a metallic surface perforated panel with a glass-filled perforated pattern is produced, the metal surface perforated panel being arranged almost flush with the oven wall is accessible on the cooking space side.
  • the oven lamp 1 shows an oven lamp 1, a knobbed glass cover 2, an outer edge 3 of the knobbed glass cover 2, a metallic fastening pocket 4, an oven jacket 5, glass knobs 6, metallic surface perforated covers 7 and a cooking chamber 8.
  • the oven lamp 1, which can be a halogen lamp, for example, is located behind the knobbed glass cover 2 outside of the one indicated Cooking space 8.
  • the glass knobs 6 of the glass cover 2 are connected to the metallic surface pinhole 7.
  • the outer edge 3 of the glass cover 2 is arranged in the metal fastening pocket 4, which is connected to the oven jacket 5.
  • the pimpled glass cover 2 receives fastening stability.
  • a cleaning of possibly dirty glass knobs 6, which can be carried out on the cooking chamber side, does not impair the functional safety of the knobbed glass cover 2 (for example, it is not possible to press off the knobbed glass cover 2).
  • the knobbed glass cover 2 can also be designed as a circular surface.
  • the holding pocket 4 is designed as a circumferential ring, but at least as a two-point holder.
  • the connection between the holding pocket 4 and the knobbed glass cover is realized by gluing.
  • the holding pocket 4 is formed by spot welding, gluing or screwing the metallic surfaces.
  • FIG. 2 shows an oven lamp 1, a wire glass pane 2.1, an outer edge of the wire glass pane 3.1, a slot holder 4.1, an oven jacket 5, a microwave-tight wire rack 7.1, an indicated cooking chamber 8 and a metallic contact surface 9.
  • the wire glass pane 2.1 covers the light source inlet opening for the cooking space in a microwave-tight manner, since the microwave-tight wire mesh 7.1 which is cast in the glass and which is electrically contacted with the oven wall 5 brings about the microwave tightness.
  • the electrical contact between the wire mesh 7.1 and the oven wall 5 takes place on the outer edge of the wire glass pane 2.1.
  • the wire mesh 7.1 lies freely on the lower side of the outer edge 3.1 on the contact surface 9 and forms a short-circuit bridge for the microwave to the oven wall 5.
  • the wire glass pane 2.1 like the knobbed glass cover 2, is to be cleaned on the cooking chamber side.
  • the wire glass pane 2.1 can be designed as a rectangular area or circular area, as has already been described under the nubby glass cover.
  • the same principle applies analogously as for the nubbed glass cover 2, the holding pocket 4 being emaciated as a slot holder 4.1.
  • the connection of the wire glass pane 2.1 with the slot holder 4.1 is achieved by gluing.

Description

Die vorliegende Erfindung bezieht sich auf eine Beleuchtungsseinrichtung für einen Ofen, insbesondere für einen Haushalts-Backofen, in dessen Garraum Mikrowellenenergie einkoppelbar ist, unter Verwendung einer Lichtquelle, die außerhalb des Garraumes angeordnet ist.The present invention relates to a lighting device for an oven, in particular for a domestic oven, in the cooking space of which microwave energy can be coupled in, using a light source which is arranged outside the cooking space.

Bei Mikrowellenöfen oder Mikrowellenherden mit oder ohne zusätzliche thermische Heizquellen, dienen zur Ausleuchtung des Garraums üblicherweise Beleuchtungseinrichtungen mit Glühfadenlampen, die beispielsweise im Bereich einer der Seitenwandungen oder der oberen Wandung des Garraums an der Garraumwand angeordnet sind. In diesem Zusammenhang ist es bekanntermaßen erforderlich, in der Garraumwandung eine relativ große Öffnung vorzusehen, hinter welcher der Lampensockel der Beleuchtungseinrichtung praktisch außerhalb des Ofenraumes befestigt ist. Für Mikrowellenbetrieb haben Beleuchtungseinrichtungen, die in den Garraum hineinragen, Nachteile besonderer Art. Schon durch die Beaufschlagung mit Mikrowellen-Feldstärken werden die Glühwendeln bekannter Lampenanordnungen, wenn die Lampe frei, d.h. ohne mikrowellentechnische Abschirmung in den Ofenraum hineinragt, zum Aufglühen gebracht.In microwave ovens or microwave ovens with or without additional thermal heating sources, lighting devices with filament lamps, which are arranged, for example, in the region of one of the side walls or the upper wall of the cooking chamber on the cooking chamber wall, are used to illuminate the cooking chamber. In this connection, it is known that it is necessary to provide a relatively large opening in the cooking chamber wall, behind which the lamp base of the lighting device is fastened practically outside the oven chamber. For microwave operation, lighting devices which protrude into the cooking space have disadvantages of a special kind. Even when the microwave field strengths are applied, the incandescent filaments become known lamp arrangements when the lamp is free, ie without microwave technology Shield protrudes into the furnace chamber, made to glow.

Diesbezüglich gehen die Bestrebungen dahin, die Glühlampen hinter die Garraumwandung zurückzusetzen und mikrowellendicht abzuschirmen. Eine solche Lösung ist aus der EP 01 20 536 A1 bekannt. In der älteren Anmeldung DE 36 41 420 A1 ist schon vorgeschlagen worden, neben der Zurücksetzung den Aufnahmeschacht für die Glühlampe in Form einer sogenannten Mikrowellenfalle auszugestalten.In this regard, efforts are being made to place the incandescent lamps behind the wall of the cooking space and to shield them against microwave leakage. Such a solution is known from EP 01 20 536 A1. In the older application DE 36 41 420 A1 it has already been proposed to design the receiving shaft for the incandescent lamp in the form of a so-called microwave trap in addition to the reset.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Beleuchtungseinrichtung bereitzustellen, die neben einfacher Aufbautechnik außerhalb des Garraumes angeordnet ist.The present invention has for its object to provide a lighting device which is arranged in addition to simple construction technology outside of the cooking space.

Eine erste Beleuchtungseinrichtung, die dieser Aufgabenstellung entspricht, ist erfindungsgemäß dadurch gekennzeichnet,

  • daß eine mikrowellendichte Glasabdeckungs-Anordnung der Lichtquellen-Eintrittsöffnung für den Garraum einerseits außerhalb desselben befestigt ist, andererseits mindestens partiell garraumseitig zugänglich und nahezu flächenbündig zur Backofenwandung angeordnet ist, wobei die Lichtquellen-Eintrittsöffnung für den Garraum durch eine mikrowellendichte Drahtglasscheibe abgedeckt ist und das in der Glasabdeckung vergossene Drahtgitter mit der Backofenwandung kontaktiert ist.
According to the invention, a first lighting device that corresponds to this task is characterized in that
  • that a microwave-proof glass cover arrangement of the light source inlet opening for the cooking chamber is attached on the one hand outside of the cooking chamber, on the other hand is at least partially accessible on the cooking chamber side and is arranged almost flush with the oven wall, the light source inlet opening for the cooking chamber being covered by a microwave-proof wire glass pane and that in the Glass cover encapsulated wire mesh is contacted with the oven wall.

Eine zweite Beleuchtungseinrichtung, die dieser Aufgabenstellung entspricht, ist erfindungsgemäss dadurch gekennzeichnet,

  • daß eine mikrowellendichte Glasabdeckungs-Anordnung der Lichtquellen-Eintrittsöffnung für den Garraum einerseits außerhalb desselben befestigt ist, andererseits mindestens partiell garraumseitig zugänglich und nahezu flächenbündig zur Backofenwandung angeordnet ist, wobei vor der Glasabdeckung garraumseitig eine metallische Flächen-Lochblende angeordnet ist.
According to the invention, a second lighting device that corresponds to this task is characterized in that
  • that a microwave-proof glass cover arrangement of the light source inlet opening for the cooking space is attached on the one hand outside of the cooking space, on the other hand is at least partially accessible on the cooking space side and is arranged almost flush with the oven wall, a metal surface perforated panel being arranged in front of the glass covering on the cooking space side.

Dadurch ist dem Umstand Rechnung getragen, daß sich möglichst im Nahbereich der Beleuchtungseinrichtung, vornehmlich im Bereich der Glühwendel, keine Mikrowellenfelder ausbilden und auf die Lampe einwirken können.This takes into account the fact that, if possible, no microwave fields form in the vicinity of the lighting device, primarily in the area of the incandescent filament, and cannot act on the lamp.

Nach einer bevorzugten Ausgestaltung ist die erfindungsgemäße Beleuchtungseinrichtung dadurch gekennzeichnet, daß die Glasabdeckung garraumseitig Noppen besitzt, die mit einer Flächen-Lochblende verbunden sind, so daß eine metallische Flächen-Lochblende mit glasgefülltem Lochmuster entsteht, wobei die nahezu flächenbündig zur Backofenwandung angeordnete metallische Flächen-Lochblende garraumseitig zugänglich ist.According to a preferred embodiment, the lighting device according to the invention is characterized in that the glass cover has knobs on the cooking chamber side, which are connected to a surface perforated panel, so that a metallic surface perforated panel with a glass-filled perforated pattern is produced, the metal surface perforated panel being arranged almost flush with the oven wall is accessible on the cooking space side.

Weitere vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen enthalten. Ausführungsbeispiele nach der Erfindung sind folgenden anhand der Zeichnung näher beschrieben. Es zeigt:

Fig. 1
Eine mikrowellendichte Glasabdeckung der Lichtquellen-Eintrittsöffnung mit glasgefüllter, metallischer Flächen-Lochblende,
Fig. 2
eine mikrowellendichte Glasabdeckung der Lichtquellen-Eintrittssöffnung mit Drahtglas.
Further advantageous embodiments of the invention are contained in the subclaims. Exemplary embodiments according to the invention are described in more detail below with reference to the drawing. It shows:
Fig. 1
A microwave-proof glass cover of the light source entry opening with a glass-filled, metallic surface pinhole,
Fig. 2
a microwave-proof glass cover of the light source entry opening with wire glass.

Gemäß Fig. 1 ist eine Backofenlampe 1, eine genoppte Glasabdeckung 2, ein äußerer Rand 3 der genoppten Glasabdeckung 2, eine metallische Befestigungstasche 4, ein Backofenmantel 5, Glasnoppen 6, metallische Flächen-Lochblenden 7 und ein Garraum 8 dargestellt. Die Backofenlampe 1, die beispielsweise eine Halogenlampe sein kann, befindet sich hinter der genoppten Glasabdeckung 2 außerhalb des angedeuteten Garraumes 8. Die Glasnoppen 6 der Glasabdeckung 2 sind mit der metallischen Flächen-Lochblende 7 verbunden. Dadurch wird die genoppte Glasabedeckung 2 zusätzlich befestigt und geführt und die Gesamtanordnung mikrowellendicht. Der äußere Rand 3 der Glasabdeckung 2 ist in der metallischen Befestigungstasche 4, die mit dem Backofenmantel 5 verbunden ist, angeordnet.1 shows an oven lamp 1, a knobbed glass cover 2, an outer edge 3 of the knobbed glass cover 2, a metallic fastening pocket 4, an oven jacket 5, glass knobs 6, metallic surface perforated covers 7 and a cooking chamber 8. The oven lamp 1, which can be a halogen lamp, for example, is located behind the knobbed glass cover 2 outside of the one indicated Cooking space 8. The glass knobs 6 of the glass cover 2 are connected to the metallic surface pinhole 7. As a result, the knobbed glass cover 2 is additionally fastened and guided and the overall arrangement is microwave-proof. The outer edge 3 of the glass cover 2 is arranged in the metal fastening pocket 4, which is connected to the oven jacket 5.

Durch die Haltetaschen 4, die bei einer rechteckig ausgebildeten, genoppten Glasabdeckung 2 an den gegenüberliegenden Schmalseiten angeordnet sind, und durch die metallische Flächen-Lochblende 7, erhält die genoppte Glasabdeckung 2 Befestigungsstabilität. Eine Reinigung evtl. verschmutzter Glasnoppen 6, die garraumseitig durchführbar ist, beeinträchtigt die Funktionssicherheit der genoppten Glasabdekkung 2 nicht (beispielsweise kein Abdrücken der genoppten Glasabdeckung 2 möglich).Through the holding pockets 4, which are arranged in a rectangular, pimpled glass cover 2 on the opposite narrow sides, and through the metallic surface perforated cover 7, the pimpled glass cover 2 receives fastening stability. A cleaning of possibly dirty glass knobs 6, which can be carried out on the cooking chamber side, does not impair the functional safety of the knobbed glass cover 2 (for example, it is not possible to press off the knobbed glass cover 2).

Die genoppte Glasabdeckung 2 kann auch als Kreisfläche ausgebildet sein. Dann ist die Haltetasche 4 als umlaufender Ring mindestens aber als flächenhafte Zweipunkthalterung ausgeführt. Die Verbindung von Haltetasche 4 und genoppter Glasabdeckung ist durch eine Verklebung realisiert. Die Haltetasche 4 wird durch Punktschweißen, Verkleben oder Verschrauben der metallischen Flächen gebildet.The knobbed glass cover 2 can also be designed as a circular surface. Then the holding pocket 4 is designed as a circumferential ring, but at least as a two-point holder. The connection between the holding pocket 4 and the knobbed glass cover is realized by gluing. The holding pocket 4 is formed by spot welding, gluing or screwing the metallic surfaces.

Gemäß Fig. 2 ist eine Backofenlampe 1, eine Drahtglasscheibe 2.1, ein äußerer Rand der Drahtglasscheibe 3.1, eine Schlitzhalterung 4.1, ein Backofenmantel 5, ein mikrowellendichtes Drahtgitter 7.1, ein angedeuteter Garraum 8 und eine metallische Kontaktfläche 9 dargestellt.2 shows an oven lamp 1, a wire glass pane 2.1, an outer edge of the wire glass pane 3.1, a slot holder 4.1, an oven jacket 5, a microwave-tight wire rack 7.1, an indicated cooking chamber 8 and a metallic contact surface 9.

Die Drahtglasscheibe 2.1 deckt die Lichtquellen-Eintrittsöffnung für den Garraum mikrowellendicht ab, da das im Glas vergossene mikrowellendichte Drahtgitter 7.1, das mit der Backofenwandung 5 elektrisch kontaktiert ist, die Mikrowellendichtheit herbeiführt. Die elektrische Kontaktierung des Drahtgitters 7.1 mit der Backofenwandung 5 geschieht am äußeren Rand der Drahtglasscheibe 2.1. Dabei liegt das Drahtgitter 7.1 an der unteren Seite des äußeren Randes 3.1 frei auf der Kontaktfläche 9 auf und bildet eine Kurzschlußbrücke für Mikrowelle zur Backofenwandung 5 hin. Die Drahtglasscheibe 2.1 ist ebenso wie die genoppte Glasabdeckung 2 garraumseitig zu reinigen. Die Drahtglasscheibe 2.1 ist ausführbar als rechteckige Fläche bzw. Kreisfläche ebenso wie unter der genoppten Glasabdeckung bereits beschrieben. Für die Halterung der Drahtglasscheibe 2.1 gilt analog das gleiche Prinzip wie für die genoppte Glasabdeckung 2, wobei die Haltetasche 4 als Schlitzhalterung 4.1 abgemagert ist. Die Verbindung der Drahtglasscheibe 2.1 mit der Schlitzhalterung 4.1 wird durch Verklebung erreicht.The wire glass pane 2.1 covers the light source inlet opening for the cooking space in a microwave-tight manner, since the microwave-tight wire mesh 7.1 which is cast in the glass and which is electrically contacted with the oven wall 5 brings about the microwave tightness. The electrical contact between the wire mesh 7.1 and the oven wall 5 takes place on the outer edge of the wire glass pane 2.1. The wire mesh 7.1 lies freely on the lower side of the outer edge 3.1 on the contact surface 9 and forms a short-circuit bridge for the microwave to the oven wall 5. The wire glass pane 2.1, like the knobbed glass cover 2, is to be cleaned on the cooking chamber side. The wire glass pane 2.1 can be designed as a rectangular area or circular area, as has already been described under the nubby glass cover. For the holder of the wire glass pane 2.1, the same principle applies analogously as for the nubbed glass cover 2, the holding pocket 4 being emaciated as a slot holder 4.1. The connection of the wire glass pane 2.1 with the slot holder 4.1 is achieved by gluing.

Claims (7)

  1. Illuminating equipment for an oven, in particular for a domestic baking oven, into the cooking chamber (8) of which microwave energy is couplable, with the use of a light source (1), which is arranged outside the cooking chamber (8), characterised thereby, that a microwave-tight glass cover arrangement (2.1, 7.1) of the light source entry opening for the cooking chamber (8) is on the one hand fastened outside the same and on the other hand arranged to be at least partially accessible at the cooking chamber side and almost areally flush with the baking oven wall (5), wherein the light source entry opening for the cooking chamber (8) is covered by a microwave-tight wire glass pane (2.1) and the wire grid (7.1) cast into the glass cover is in contact with the baking oven wall (5).
  2. Illuminating equipment for an oven, in particular for a domestic baking oven, into the cooking chamber (8) of which microwave energy is couplable, with the use of a light source (1), which is arranged outside the cooking chamber (8), characterised thereby, that a microwave-tight glass cover arrangement (2, 7) of the light source entry opening for the cooking chamber (8) is on the one hand fastened outside the same and on the other hand arranged to be at least partially accessible at the cooking chamber side and almost areally flush with the baking oven wall (5), wherein a metallic areal perforated partition (7) is arranged in front of the glass cover (2) at the cooking chamber side.
  3. Illuminating equipment according to claim 2, characterised thereby, that the glass cover (2) comprises knubs (6) at the cooking chamber side, which are connected with the metallic areal perforated partition (7), so that a metallic areal perforated partition with a glass-filled hole pattern arises, wherein the metallic areal perforated partition (7), which is almost areally flush with the baking oven wall (5), is accessible at the cooking chamber side.
  4. Illuminating equipment according to claim 2 and 3, characterised thereby, that the glass cover, which is connected with the metallic areal perforated partition (7) by way of the knubs (6), is arranged at the outer rim (3) in a metallic mount which is connected with the baking oven casing (5).
  5. Illuminating equipment according to claim 1, characterised thereby, that the wire glass pane (2.1) is connected at the outer rim (3.1) with a metallic slot mount (4.1) fastened at the baking oven casing (5).
  6. Illuminating equipment according to claim 1 or 2, characterised thereby, that the light source entry opening is a circular area, wherein the retaining pocket (4) or the slot mount (4.1) is formed as encircling ring, at least two mutually opposite ring portions however being arranged as retaining pockets (4) or slot mounts (4.1).
  7. Illuminating equipment according to claim 1 or 2, characterised thereby, that the light source entry opening is a rectangular area, wherein the metallic retaining pockets (4) or the metallic slot mounts (4.1) are arranged as areal two-point mounts at the mutually opposite narrow sides of the rectangular surface.
EP91106144A 1990-06-11 1991-04-17 Lighting device for an oven Expired - Lifetime EP0461363B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4018697 1990-06-11
DE4018697A DE4018697A1 (en) 1990-06-11 1990-06-11 LIGHTING DEVICE FOR AN OVEN

Publications (3)

Publication Number Publication Date
EP0461363A2 EP0461363A2 (en) 1991-12-18
EP0461363A3 EP0461363A3 (en) 1992-12-23
EP0461363B1 true EP0461363B1 (en) 1996-01-17

Family

ID=6408207

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91106144A Expired - Lifetime EP0461363B1 (en) 1990-06-11 1991-04-17 Lighting device for an oven

Country Status (3)

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EP (1) EP0461363B1 (en)
DE (2) DE4018697A1 (en)
ES (1) ES2085371T3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19935387C2 (en) * 1999-07-29 2001-11-29 Karlsruhe Forschzent Microwave device for tempering a heating bath

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE444061B (en) * 1983-03-23 1986-03-17 Philips Norden Ab MICROWAG OVEN LIGHTING DEVICE
US4618756A (en) * 1985-07-08 1986-10-21 Whirlpool Corporation Air circulation system for microwave oven
US4621180A (en) * 1985-07-08 1986-11-04 Whirlpool Corporation Cavity illumination means for microwave oven
DE3732690A1 (en) * 1987-09-29 1989-04-13 Licentia Gmbh Illuminating device for illuminating the cooking space of a microwave oven
DE3732689A1 (en) * 1987-09-29 1989-04-13 Licentia Gmbh Illuminating device for illuminating the cooking space of a microwave oven
DE8713264U1 (en) * 1987-10-02 1987-12-03 Hurst & Schroeder Gmbh, 5980 Werdohl, De
DE3808718C2 (en) * 1988-03-16 1993-12-23 Licentia Gmbh Lighting device for illuminating the cooking space of a microwave oven

Also Published As

Publication number Publication date
DE4018697A1 (en) 1991-12-12
EP0461363A2 (en) 1991-12-18
DE59107268D1 (en) 1996-02-29
ES2085371T3 (en) 1996-06-01
EP0461363A3 (en) 1992-12-23

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