EP0117404B1 - Support guide in a continuous casting plant - Google Patents

Support guide in a continuous casting plant Download PDF

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Publication number
EP0117404B1
EP0117404B1 EP84100417A EP84100417A EP0117404B1 EP 0117404 B1 EP0117404 B1 EP 0117404B1 EP 84100417 A EP84100417 A EP 84100417A EP 84100417 A EP84100417 A EP 84100417A EP 0117404 B1 EP0117404 B1 EP 0117404B1
Authority
EP
European Patent Office
Prior art keywords
guide member
tie rods
crossbeam
fixed
tie rod
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
Application number
EP84100417A
Other languages
German (de)
French (fr)
Other versions
EP0117404A1 (en
Inventor
Heinrich Scholz
Günter Dr. Flemming
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.)
SMS Siemag AG
Original Assignee
SMS Schloemann Siemag AG
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 SMS Schloemann Siemag AG filed Critical SMS Schloemann Siemag AG
Priority to AT84100417T priority Critical patent/ATE19014T1/en
Publication of EP0117404A1 publication Critical patent/EP0117404A1/en
Application granted granted Critical
Publication of EP0117404B1 publication Critical patent/EP0117404B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
    • B22D11/1282—Vertical casting and curving the cast stock to the horizontal

Definitions

  • the invention relates to a support guide in a beach caster for steel with two opposite rows of guide and drive rollers, which are mounted in sections on trusses, with a head traverse on supports of a fixed crossbar arranged on a base frame held by tie rods and assigned one against the force of the tie rods Preloading springs can be removed from the strand and the tie rods are assigned pressure medium cylinders acting against this preload.
  • the pressure medium cylinders counteracting the springs are attached on the face side below the tie rods to the fixed crossmember.
  • special lifting cylinders are attached to the lateral approaches of the head traverse.
  • Special hand-operated holding devices are provided for fastening the fixed crossbar to the base frame.
  • pressure medium cylinders are assigned to the end of the tie rods in the area of the head cross member and the fixed cross member is detachably fastened to the base frame via the tie rods.
  • the tie rods are advantageously provided in the area of the fixed crossbar with a slot for receiving a connecting piece to the base frame.
  • annular centering pieces are arranged between the base frame and the fixed crossbeam, in the opening of which a tie rod is guided, each tie rod between the centering piece and the fixed crossbar having a stop collar.
  • the invention proposes that the head traverse is provided on both sides with tubes into which the tie rods protrude at one end, which acts on the compression spring received in the tube and the end faces of which are each assigned a pressure medium cylinder.
  • Interchangeable spacers can finally be arranged between the columns of the fixed crossbar and the tubes of the head crossbar for setting the format.
  • each strand guide element consists of a fixed crossbeam 2 and a head crossbeam 3 arranged on the base frame 1.
  • Bearings 4 of strand guide rollers 5 are arranged on the fixed crossbeam 2 and bearings 6 of strand guide rollers 7 are arranged on the head crossbeam 3.
  • the fixed crossbeam 3 is provided with four hollow columns 8, on the covers 9 of which pivotable spacers 10 for adjusting the roller spacing to the format of a cast strand 11 are located.
  • the head traverse 3 is supported with four tubes 12 on the spacers 10.
  • the head traverse 3 is clamped to the fixed crossbar 2 by tie rods 13, on each of which a compression spring 14 is held between the end limit 15 and a cover 16 within the tubes 12.
  • a pressure medium cylinder 17 is arranged inside each of the tubes 12, the piston 18 of which, when acted upon, acts opposite to the compression springs 14 on the end face of the tie rod 13.
  • the tie rods 13 are each guided in the cover 9 in a bearing ring 19 and form the guide for the head traverse 3.
  • receptacles 20 are fixed for positioning the fixed crossbeam, which are provided with a hole for receiving the lower end of the tie rods 13.
  • Each receptacle 20 carries a centering piece 21 with an inner guide sleeve 22 for the tie rods 13.
  • the fixed crossbeam 2 is provided with foot rings 23 which are placed on the centering pieces 21. Between the centering piece 21 and the foot ring 23, the tie rods 13 are each provided with a stop ring 24.
  • Receptacles 20 and tie rods 13 are provided with radial slots aligned with one another, into which connecting pieces 25 are inserted.
  • the spring-loaded tie rods 13 hold the head crossbar 3 via the spacers 10 against the hollow columns 8 of the fixed crossbar 2.
  • the fixed crossbar 2 is braced on the base frame 1 at the same time.
  • the head traverse 3 is raised so that a tensioned strand can be conveyed freely.
  • the connecting pieces 25 are also loosened for removal, whereupon the base cross member 2 and head cross member 3 can be removed from the base frame 1.
  • the fixed crossbeam 2 is held by the stop rings 24 of the tie rods 13.

Abstract

A roller guide for use in a continuous casting installation for steel is divided into segments. Each segment includes a fixed guide member which rests on a base and a movable guide member which is supported by the fixed guide member. The guide members carry rollers which cooperate to define a path for a continuously cast steel strand. The fixed guide member has a series of hollow columns which are aligned with respective tubular elements provided on the movable guide member. Spacers for adjusting the distance between the rollers are disposed between the columns and tubular elements. A tie rod extends through each column and has a first end located externally of but adjacent to the respective column. The first end of each tie rod has a passage which registers with a corresponding passage in the base. Each pair of registering passages receives a locking pin. The locking pins connect the tie rods to the base and indirectly connect the fixed guide member to the base via the tie rods. Each tie rod has a second end located in one of the tubular elements of the movable guide member. A compression spring in each tubular element reacts against the associated tie rod and against the movable guide member thereby urging the movable guide member towards the fixed guide member. The action of the compression springs also causes the locking pins, and hence the fixed guide member, to be braced against the base. A piston-and-cylinder unit mounted inside each tubular element is arranged to act against the adjacent end face of the associated tie rod counter to the respective compression spring.

Description

Die Erfindung betrifft eine Stützführung in einer Strandgießanlage für Stahl mit zwei gegenüberliegenden Reihen von Führungs- und Treibrollen, die abschnittsweise an Traversen gelagert sind, wobei eine Kopftraverse an Stützen einer an einem Grundrahmen angeordneten Festtraverse durch Zuganker gehalten und gegen die Kraft von den Zugankern zugeordneten eine Vorspannung bewirkende Federn vom Strang weg entfernbar ist und den Zugankern gegen diese Vorspannung wirkende Druckmittelzylinder zugeordnet sind.The invention relates to a support guide in a beach caster for steel with two opposite rows of guide and drive rollers, which are mounted in sections on trusses, with a head traverse on supports of a fixed crossbar arranged on a base frame held by tie rods and assigned one against the force of the tie rods Preloading springs can be removed from the strand and the tie rods are assigned pressure medium cylinders acting against this preload.

Bei einer bekannten Stützführung dieser Gattung sind die den Federn entgegenwirkenden Druckmittelzylinder stirnseitig unterhalb der Zuganker an der Festtraverse angebracht. Zum Anheben der Kopftraverse z.B. beim Ausfördern eines erstarrten Stranges oder zur Formatverstellung sind besondere Hubzylinder auf seitlichen Ansätzen der Kopftraverse angebracht. Zur Befestigung der Festtraverse auf dem Grundrahmen sind besondere von Hand zu betätigende Halteeinrichtungen vorgesehen. (DE-OS 29 42 144) Aufgabe der Erfindung ist die Schaffung einer einfacheren Stützführung mit hydraulischer, beim Gießen druckloser Formateinstellung gegen fixe Anschläge, die gegen Überlast gesichert und leicht entlastbar ist. Darüber hinaus soll mit der Erfindung die Befestigung der Festtraverse auf dem Grundrahmen vereinfacht und zum Zwecke eines schnellen Austauschs erleichtert werden.In a known support guide of this type, the pressure medium cylinders counteracting the springs are attached on the face side below the tie rods to the fixed crossmember. For lifting the head traverse e.g. When a solid strand is being conveyed out or for format adjustment, special lifting cylinders are attached to the lateral approaches of the head traverse. Special hand-operated holding devices are provided for fastening the fixed crossbar to the base frame. (DE-OS 29 42 144) The object of the invention is to provide a simpler support guide with hydraulic, pressure-free format setting against fixed stops when casting, which is secured against overload and easily relieved. In addition, the invention is intended to simplify the fastening of the fixed crossbeam to the base frame and to facilitate it for the purpose of quick exchange.

Dies wird erfindungsgemäß dadurch erreicht, daß die Druckmittelzylinder den Zugankern im Bereich der Kopftraverse stirnseitig zugeordnet sind und die Festtraverse über die Zuganker am Grundrahmen lösbar befestigt ist.This is achieved according to the invention in that the pressure medium cylinders are assigned to the end of the tie rods in the area of the head cross member and the fixed cross member is detachably fastened to the base frame via the tie rods.

Dadurch wird eine besondere Hubeinrichtung für die Kopftraverse eingespart. Die zusätzliche verwendung der Zuganker zur Befestigung der Festtraverse am Grundrahmen erspart besondere Haltemittel und beschleunigt den Wechselvorgang.This saves a special lifting device for the head traverse. The additional use of the tie rods for fastening the fixed crossbeam to the base frame saves special holding means and accelerates the changing process.

Die Zuganker sind vorteilhaft im Bereich der Festtraverse mit einem Schlitz zur Aufnahme eines Verbindungsstückes zum Grundrahmen versehen.The tie rods are advantageously provided in the area of the fixed crossbar with a slot for receiving a connecting piece to the base frame.

Gemäß einem weiteren Merkmal der Erfindung sind zwischen dem Grundrahmen und der Festtraverse ringförmige Zentrierstücke angeordnet, in deren Öffnung je ein Zuganker geführt ist, wobei jeder Zuganker zwischen Zentrierstück und Festtraverse einen Anschlagbund aufweist.According to a further feature of the invention, annular centering pieces are arranged between the base frame and the fixed crossbeam, in the opening of which a tie rod is guided, each tie rod between the centering piece and the fixed crossbar having a stop collar.

Darüber hinaus schlägt die Erfindung vor, daß die Kopftraverse beidseits mit Rohren versehen ist, in die die Zuganker mit einem Ende hineinragen auf das eine, im Rohr aufgenommene Druckfeder einwirkt und deren Stirnseiten je ein Druckmittelzylinder zugeordnet ist.In addition, the invention proposes that the head traverse is provided on both sides with tubes into which the tie rods protrude at one end, which acts on the compression spring received in the tube and the end faces of which are each assigned a pressure medium cylinder.

Zur Formateinstellung können schließlich zwischen den Säulen der Festtraverse und den Rohren der Kopftraverse auswechselbare Distanzstücke angeordnet sein.Interchangeable spacers can finally be arranged between the columns of the fixed crossbar and the tubes of the head crossbar for setting the format.

In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt. Es zeigen

  • Fig. 1 den Querschnitt eines Elements der Strangführung und
  • Fig. 2 Seitenansicht des strangführungselements.
In the drawing, an embodiment of the invention is shown. Show it
  • Fig. 1 shows the cross section of an element of the strand guide and
  • Fig. 2 side view of the strand guide element.

In der stützführung einer stranggießanlage sind mehrere der in den Figuren 1 und 2 der Zeichnung dargestellten Strangführungselemente an einem bogenförmig verlaufenden Grundrahmen 1 angeordnet. Jedes Strangführungselement besteht aus einer am Grundrahmen 1 angeordneten Festtraverse 2 und einer Kopftraverse 3. An der Festtraverse 2 sind Lager 4 von Strangführungsrollen 5 und an der Kopftraverse 3 sind Lager 6 von Strangführungsrollen 7 angeordnet.In the support guide of a continuous caster, several of the strand guide elements shown in FIGS. 1 and 2 of the drawing are arranged on an arched base frame 1. Each strand guide element consists of a fixed crossbeam 2 and a head crossbeam 3 arranged on the base frame 1. Bearings 4 of strand guide rollers 5 are arranged on the fixed crossbeam 2 and bearings 6 of strand guide rollers 7 are arranged on the head crossbeam 3.

Die Festtraverse 3 ist mit vier Hohlsäulen 8 versehen, auf deren Deckeln 9 ausschwenkbare Distanzstücke 10 zur Einstellung des Rollenabstandes auf das Format eines Gießstranges 11 liegen. Die Kopftraverse 3 ist mit vier Rohren 12 auf den Distanzstücken 10 abgestützt. Die Kopftraverse 3 ist mit der Festtraverse 2 durch Zuganker 13 verspannt, auf denen innerhalb der Rohre 12 je eine Druckfeder 14 zwischen einer Endbegrenzung 15 und einem Deckel 16 gehalten ist.The fixed crossbeam 3 is provided with four hollow columns 8, on the covers 9 of which pivotable spacers 10 for adjusting the roller spacing to the format of a cast strand 11 are located. The head traverse 3 is supported with four tubes 12 on the spacers 10. The head traverse 3 is clamped to the fixed crossbar 2 by tie rods 13, on each of which a compression spring 14 is held between the end limit 15 and a cover 16 within the tubes 12.

Innerhalb der Rohre 12 ist je ein Druckmittelzylinder 17 angeordnet, dessen Kolben 18 bei Beaufschlagung entgegengesetzt zu den Druckfedern 14 auf die Stirnseite des Zugankers 13 wirkt. Die Zuganker 13 sind innerhalb der Deckel 9 in je einem Lagerring 19 geführt und bilden die Führung für die Kopftraverse 3.A pressure medium cylinder 17 is arranged inside each of the tubes 12, the piston 18 of which, when acted upon, acts opposite to the compression springs 14 on the end face of the tie rod 13. The tie rods 13 are each guided in the cover 9 in a bearing ring 19 and form the guide for the head traverse 3.

Im Grundrahmen 1 sind zur Positionierung der Festtraverse 2 Aufnahmen 20 befestigt, die mit einer Bohrung zur Aufnahme des unteren Endes der Zuganker 13 versehen sind. Jede Aufnahme 20 trägt ein Zentrierstück 21 mit einer inneren Führungshülse 22 für die Zuganker 13. Die Festtraverse 2 ist mit Fußringen 23 versehen, die auf den Zentrierstücken 21 aufgesetzt sind. Zwischen Zentrierstück 21 und Fußring 23 sind die Zuganker 13 mit je einem Anschlagring 24 versehen. Aufnahmen 20 und Zuganker 13 sind mit zueinander fluchtenden Radialschlitzen versehen, in die verbindungsstücke 25 eingeführt sind.In the base frame 1 2 receptacles 20 are fixed for positioning the fixed crossbeam, which are provided with a hole for receiving the lower end of the tie rods 13. Each receptacle 20 carries a centering piece 21 with an inner guide sleeve 22 for the tie rods 13. The fixed crossbeam 2 is provided with foot rings 23 which are placed on the centering pieces 21. Between the centering piece 21 and the foot ring 23, the tie rods 13 are each provided with a stop ring 24. Receptacles 20 and tie rods 13 are provided with radial slots aligned with one another, into which connecting pieces 25 are inserted.

Beim Gießen halten die federbelasteten Zuganker 13 die Kopftraverse 3 über die Distanzstücke 10 gegen die Hohlsäulen 8 der Festtraverse 2. Dadurch wird zugleich die Festtraverse 2 auf dem Grundrahmen 1 verspannt. Durch Beaufschlagung der Druckmittelzylinder 17 wird die Kopftraverse 3 hochgerahren, so daß ein verspannter Strang frei ausgefördert werden kann. Durch Beaufschlagung der Druckmittelzylinder 17 werden auch die Verbindungsstücke 25 zum Herausnehmen gelockert, worauf Grundtraverse 2 und Kopftraverse 3 vom Grundrahmen 1 abgenommen werden können. Beim Abtransport des Führungselements wird die Festtraverse 2 von den Anschlagringen 24 der Zuganker 13 gehalten.When casting, the spring-loaded tie rods 13 hold the head crossbar 3 via the spacers 10 against the hollow columns 8 of the fixed crossbar 2. As a result, the fixed crossbar 2 is braced on the base frame 1 at the same time. By acting on the pressure medium cylinder 17, the head traverse 3 is raised so that a tensioned strand can be conveyed freely. By applying pressure to the pressure medium cylinders 17, the connecting pieces 25 are also loosened for removal, whereupon the base cross member 2 and head cross member 3 can be removed from the base frame 1. When the guide element is removed, the fixed crossbeam 2 is held by the stop rings 24 of the tie rods 13.

Claims (5)

1. Support guide in a continuous casting plant with oppositely disposed rows of guide and drive rolls (5; 7), which are borne in stages at crossbeams (2; 3), wherein a head crossbeam (3) is held by tie rods (13) at supports of a fixed crossbeam (2) arranged at a base frame (1) and removable away from the cast strand (11) against the force of springs (14) associated with the tie rods and effecting a bias and pressure medium cylinders (17) acting against this bias are associated with the tie rods, characterised thereby, that the pressure medium cylinders (17) are associated at the end face in the region of the head crossbeam (3) with the tie rods (13) and the fixed crossbeam (2) is detachably fastened at the base frame (1) by way of the tie rods (13).
2. Support guide according to claim 1, characterised thereby, that the tie rods (13) are provided in the region of the fixed crossbeam (2) with a slot for the reception of a connecting piece (25) to the base frame (1).
3. Support guide according to claim 1, characterised thereby, that annular centring pieces (21), in the opening of which a respective tie rod (13) is guided, are arranged between the base frame (1) and the fixed crossbeam (2) and each tie rod (13) displays an abutment collar (24) between centring piece (21) and fixed crossbeam (2).
4. Support guide according to claim 1, characterised thereby, that the head crossbeam (3) is provided at both sides with tubes (3), into which each of the tie rods (13) projects by a respective end, onto which acts a compression spring (14) received in the tube (12) and the end faces of which are associated with a respective pressure medium cylinder (17).
5. Support guide according to claim 1, characterised thereby, that exchangeable spacer members (10) are arranged between the columns (8) of the fixed crossbeam (2) and the tubes (3) of the head crossbeam (3).
EP84100417A 1983-02-02 1984-01-17 Support guide in a continuous casting plant Expired EP0117404B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84100417T ATE19014T1 (en) 1983-02-02 1984-01-17 SUPPORT GUIDE IN A CONTINUOUS CASTING PLANT.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3303386 1983-02-02
DE19833303386 DE3303386A1 (en) 1983-02-02 1983-02-02 SUPPORT GUIDE IN A CONTINUOUS CASTING PLANT

Publications (2)

Publication Number Publication Date
EP0117404A1 EP0117404A1 (en) 1984-09-05
EP0117404B1 true EP0117404B1 (en) 1986-04-09

Family

ID=6189780

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84100417A Expired EP0117404B1 (en) 1983-02-02 1984-01-17 Support guide in a continuous casting plant

Country Status (6)

Country Link
US (1) US4590986A (en)
EP (1) EP0117404B1 (en)
AT (1) ATE19014T1 (en)
CA (1) CA1193826A (en)
DE (2) DE3303386A1 (en)
ES (1) ES528777A0 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998032558A1 (en) * 1997-01-27 1998-07-30 Mannesmann Ag Strand guide, specially for a slab continuous casting installation
EP2525928B2 (en) † 2010-01-22 2022-06-15 Primetals Technologies Austria GmbH Strand guide segment for guiding and supporting a metallic strand in a continuous casting machine

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4905754A (en) * 1989-02-28 1990-03-06 Sumitec, Inc. Footroll assembly for a continuous casting apparatus
US5490555A (en) * 1994-05-25 1996-02-13 Voest-Alpine Services and Technologies Corp. Method of controlling forces applied to a continuously cast product
US5850871A (en) * 1996-04-04 1998-12-22 Ag Industries, Inc. Foot guide and control system for continuous casting machine
DE19811651A1 (en) * 1998-03-18 1999-09-23 Schloemann Siemag Ag Support and guide system for a billet produced in a continuous casting installation
DE19824366A1 (en) * 1998-05-30 1999-12-02 Schloemann Siemag Ag Strand guide segment for slab caster
AT408853B (en) * 2000-06-02 2002-03-25 Voest Alpine Ind Anlagen STRING GUIDANCE FOR A CONTINUOUS CASTING SYSTEM
US6523601B1 (en) 2001-08-31 2003-02-25 Shlomo Hury Method and apparatus for improving internal quality of continuously cast steel sections
US7029072B1 (en) 2002-03-11 2006-04-18 Wirtgen America, Inc. Modified rumble strip cutter
DE102009029890A1 (en) * 2009-06-23 2010-12-30 Sms Siemag Ag continuous casting plant
CN102039388A (en) * 2011-01-20 2011-05-04 中冶赛迪工程技术股份有限公司 Casting guiding device
CN103949602A (en) * 2014-04-22 2014-07-30 中国重型机械研究院股份公司 Great pressure-down sector section equipment
CN104550800B (en) * 2014-12-15 2016-09-21 中冶南方工程技术有限公司 A kind of sheet billet continuous casting bending section frame gap adjusting apparatus

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT340082B (en) * 1975-10-29 1977-11-25 Voest Ag STRAND GUIDE ON A CONTINUOUS CASTING PLANT
FR2366898A1 (en) * 1976-10-11 1978-05-05 Fives Cail Babcock Guide roll track for continuous casting plant - where rolls are prestressed by adjustable compression springs
DE2740221C2 (en) * 1977-09-07 1984-09-06 Concast AG, Zürich Support guide in a continuous caster
AT368419B (en) * 1978-09-19 1982-10-11 Voest Alpine Ag STRING GUIDANCE FOR CONTINUOUS CASTING PLANTS
DE2942144A1 (en) * 1979-10-18 1981-04-30 Schloemann-Siemag AG, 4000 Düsseldorf Guide and support roll track for continuous casting plant - where distance pieces mounted on pivot bolts can be used for rapid adjustment of track to suit slab thickness
AT368049B (en) * 1979-11-28 1982-08-25 Voest Alpine Ag FITTING ON A SUPPORT AND GUIDE FOR A CONTINUOUS CASTING SYSTEM
CH654767A5 (en) * 1981-04-30 1986-03-14 Concast Holding Ag METHOD AND DEVICE FOR BENDING A STRAND IN A STEEL CONTINUOUS CASTING SYSTEM.

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998032558A1 (en) * 1997-01-27 1998-07-30 Mannesmann Ag Strand guide, specially for a slab continuous casting installation
DE19703811A1 (en) * 1997-01-27 1998-07-30 Mannesmann Ag Strand guidance, in particular for a slab caster
DE19703811C2 (en) * 1997-01-27 1999-02-18 Mannesmann Ag Strand guidance, in particular for a slab caster
US6234301B1 (en) * 1997-01-27 2001-05-22 Mannesmann Ag Strand guide, specially for a slab continuous casting installation
EP2525928B2 (en) † 2010-01-22 2022-06-15 Primetals Technologies Austria GmbH Strand guide segment for guiding and supporting a metallic strand in a continuous casting machine

Also Published As

Publication number Publication date
DE3303386A1 (en) 1984-08-09
ES8406917A1 (en) 1984-09-01
EP0117404A1 (en) 1984-09-05
ES528777A0 (en) 1984-09-01
US4590986A (en) 1986-05-27
DE3460069D1 (en) 1986-05-15
CA1193826A (en) 1985-09-24
ATE19014T1 (en) 1986-04-15

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