EP0029878B2 - Supporting and anchoring of a convertor on a trunnion ring - Google Patents
Supporting and anchoring of a convertor on a trunnion ring Download PDFInfo
- Publication number
- EP0029878B2 EP0029878B2 EP19800104856 EP80104856A EP0029878B2 EP 0029878 B2 EP0029878 B2 EP 0029878B2 EP 19800104856 EP19800104856 EP 19800104856 EP 80104856 A EP80104856 A EP 80104856A EP 0029878 B2 EP0029878 B2 EP 0029878B2
- Authority
- EP
- European Patent Office
- Prior art keywords
- converter
- brackets
- vessel
- carrier ring
- casing
- 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
Links
- 238000004873 anchoring Methods 0.000 title 1
- 230000008439 repair process Effects 0.000 description 2
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000256 polyoxyethylene sorbitan monolaurate Substances 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/4633—Supporting means
Definitions
- the invention relates to the storage and fastening of a tiltable vessel or converter on an open to one side, approximately horseshoe-shaped, surrounding the converter jacket at a distance from the support ring at three points by means of detachable support and connecting elements arranged at a distance of about 120 ° and attached to the circumference of the converter jacket Consoles, one of which lies in the tilting plane of the converter.
- a releasable mounting for crucibles or converters is known, in which the crucible is supported on the supporting body surrounding it by means of upper and lower support devices.
- the upper support devices consist of support bodies pivotably mounted on the ring-shaped support body and stop rigidly attached to the jacket of the crucible. bodies with counter support surfaces.
- the lower support devices are rigidly attached to the crucible wall and can be adjusted to the underside of the supporting body by means of detachable wedge pairs.
- the distance between the upper and lower supports is large.
- the vessel becomes warmer than the supporting body and, due to the greater thermal expansion, an air gap is formed between the contact surfaces. Since the lining is thinner with each batch and the vessel wall becomes hotter, the expansion increases in the axial direction of the vessel.
- the crucible or converter falls from the supports on the support bodies onto the wedge pairs after overcoming the friction in accordance with the air gap.
- the stop bodies are acted upon when the column is erected.
- the changing impact loads of the support devices mean a major disadvantage of the known storage.
- the invention has set itself the task of avoiding this disadvantage, reducing the dimensions of the storage and designing such that the individual bearing elements do not have to be dismantled when removing the converter, while at the same time the connections between the support ring and the converter vessel are easily detachable and after exchange is easily connectable again.
- the solution to the problem is to design the storage and attachment of a tiltable vessel or converter of the type mentioned above in such a way that the support ring has box walls which lead upwards or downwards, in each of which a support axis is parallel to the one at a distance vertically below or above the Converter jacket attached console is arranged, and the bearing housing of the pivot bearing associated with the support axles abut the top or bottom of the brackets, and that hinged screws are articulated to the bearing housings and are guided in slots through the brackets.
- the converter vessel When carrying out the storage, the converter vessel can be fixed upright on the support ring.
- the brackets are arranged on the converter jacket above the support ring and the box walls leading upwards accommodate the support axles with bearings, the bearing housings abutting the underside of the brackets.
- the converter vessel can be attached to the support ring in a hanging manner.
- the brackets are arranged on the converter jacket below the support ring.
- the box walls of the support ring are led out downwards.
- the support axles are located above the brackets and the bearing housings are on the top of the brackets.
- the vessel is generally removed after the connecting elements have been loosened and the vessel has to be lifted slightly in a standing version or the vessel has been lowered slightly in a hanging version towards the open side of the support ring in the horizontal direction.
- the converter is provided with a side spout, and there is no bearing on the support ring on the spout side in order to keep the heat of the liquid vessel contents away from the storage and to avoid damage from splashes of the liquid metal, and the vessel is replaced for space reasons in the direction opposite the spout, is pivoted upwards in a hanging arrangement after loosening the connecting elements and slightly lowering the support ring around the converter pivot pin and the vessel is moved to a repair stand with a converter change carriage.
- a replacement of the converter vessel in the spout opposite direction is thus easily possible with the support ring open on this side.
- the console lying on the spout side and the associated storage are not endangered due to the greater distance from the spout opening.
- the folding screws in the blowing position of the converter are not additionally loaded by the weight of the container.
- the converter 1 shown in FIG. 1 is suspended from a horseshoe-shaped support ring 3a.
- the folding screws 8 establish the non-positive connection between the bearing housings 5 and the brackets 2 arranged below on the converter casing 1a with a preload corresponding to the converter counterweight.
- the converter 1 is supported with its brackets 2 on a horseshoe-shaped, angled support ring 3b.
- the console 2 lying in the tilting plane is arranged on the spout side between the spout opening and the angled support ring 3b.
- the support axles 7 and the bearings 5, 6 are located in box walls 9 of the support ring 3b which are led out upwards and below the brackets.
- the non-positive connection between converter 1 and support ring 3b is made by means of folding screws 8.
- 1a denotes the converter jacket to which the brackets 2 are attached.
- the 'support shafts 7 are fixedly supported by means of axle holders.
- the support axles 7 supported at both ends have smaller dimensions than the known support pins arranged on the converter jacket and are largely unaffected by the heating of the converter jacket.
- the support axles 7 take up conventional spherical bearings 6 enclosed in housings 5. The distance between the housing 5 and the box walls 9 as well as the oscillating mounting ensure a forced movement in all directions with thermal expansion of the converter.
- the use of commercially available spherical bearings means an inexpensive solution.
- Fig. 4 shows a section through the storage in the section plane IV-IV of Fig. 3.
- hinged bolts 8 are pivotally connected in pockets, which engage in slots of the brackets 2.
- the folding screws 8 are designed so that they can absorb the entire weight of the converter and ensure a secure connection between the bearing housing 5 and the brackets 2.
- the number of folding screws 8 per bearing depends on the size and weight of the converter.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Description
Die Erfindung betrifft die Lagerung und Befestigung eines kippbaren Gefäßes oder Konverters an einem nach einer Seite offenen, etwa hufeisenförmigen, den Konvertermantel mit Abstand umgebenden Tragring an drei Punkten mittels im Abstand von etwa 120° angeordneter lösbarer Stütz- und Verbindungselemente sowie am Umfang des Konvertermantels befestigter Konsolen, von denen eine in der Kippebene des Konverters liegt.The invention relates to the storage and fastening of a tiltable vessel or converter on an open to one side, approximately horseshoe-shaped, surrounding the converter jacket at a distance from the support ring at three points by means of detachable support and connecting elements arranged at a distance of about 120 ° and attached to the circumference of the converter jacket Consoles, one of which lies in the tilting plane of the converter.
Zur Durchführung von Reparaturen und zur Neuzustellung von Konvertern ist es bekannt, dieselben an dem den Konvertermantel mindestens um dessen halben Umfang umgebenden Tragring an drei Punkten lösbar zu lagern. Dazu sind am Konvertermantel Stützzapfen befestigt, die in Lagerbüchsen gelagert sind, welche mittels schwenkbarer Zughaken am Tragring befestigt sind. Die Stützzapfen sind als Freiträger und die Lagerbüchsen zweckmäßig zweiteilig ausgebildet (DE-PS 20 51 382). Das große Gewicht des Konverters einschließlich des eingesetzten Roheisens erfordert große Abmessungen der Stützzapfen und der Lagerung einschließlich der Verriegelungselemente. Beim Ausbau des Konverters muß die Lagerung vollständig gelöst werden.For carrying out repairs and for relining converters, it is known to releasably mount them on the support ring surrounding the converter jacket at least around half its circumference at three points. For this purpose, support pins are fastened to the converter jacket and are mounted in bearing bushes which are fastened to the supporting ring by means of swiveling pulling hooks. The support pins are designed as cantilevers and the bearing bushes expediently in two parts (DE-PS 20 51 382). The great weight of the converter, including the pig iron used, requires large dimensions of the support pins and the bearing, including the locking elements. When removing the converter, the bearing must be completely released.
Weiterhin ist aus der FR-PS 1 468 079 eine lösbare Lagerung für Tiegel oder Konverter bekannt, bei der sich der Tiegel auf dem ihn umgebenden Tragkörper mittels oberer und unterer Stützvorrichtungen abstützt. Die oberen Stützvorrichtungen bestehen aus am ringförmigen Tragkörper schwenkbar gelagerten Stützkörpern und am Mantel des Tiegels starr befestigten Anschlag- . körpern mit Gegenstützflächen.Furthermore, from FR-PS 1 468 079 a releasable mounting for crucibles or converters is known, in which the crucible is supported on the supporting body surrounding it by means of upper and lower support devices. The upper support devices consist of support bodies pivotably mounted on the ring-shaped support body and stop rigidly attached to the jacket of the crucible. bodies with counter support surfaces.
Die unteren Stützvorrichtungen sind an der Tiegelwand starr befestigt und mittels lösbarer Keilpaare an die Unterseite des Tragkörpers anstellbar.The lower support devices are rigidly attached to the crucible wall and can be adjusted to the underside of the supporting body by means of detachable wedge pairs.
Der Abstand zwischen den oberen und unteren Stützvorrichtungen ist groß. Während des Betriebs wird das Gefäß wärmer als der Tragkörper und es bildet sich infolge der größeren Wärmedehnung ein Luftspalt zwischen den Auflageflächen. Da die Ausmauerung bei jeder Charge dünner und somit die Gefäßwandung heißer wird, nimmt die Dehnung in axialer Richtung des Gefäßes zu. Beim Schwenken fällt der Tiegel oder Konverter nach Überwindung der Reibung entsprechend dem Luftspalt von den Auflagen an den Stützkörpern auf die Keilpaare.The distance between the upper and lower supports is large. During operation, the vessel becomes warmer than the supporting body and, due to the greater thermal expansion, an air gap is formed between the contact surfaces. Since the lining is thinner with each batch and the vessel wall becomes hotter, the expansion increases in the axial direction of the vessel. When swiveling, the crucible or converter falls from the supports on the support bodies onto the wedge pairs after overcoming the friction in accordance with the air gap.
Beim Wiederaufrichten werden die Anschlagkörper beaufschlagt. Die wechselnden Schlagbeanspruchungen der Stützvorrichtungen bedeuten einen großen Nachteil der bekannten Lagerung.The stop bodies are acted upon when the column is erected. The changing impact loads of the support devices mean a major disadvantage of the known storage.
Die Erfindung hat sich die Aufgabe gestellt, diesen Nachteil zu vermeiden, die Abmessungen der Lagerung zu reduzieren und so zu gestalten, daß die einzelnen Lagerelemente beim Ausbau des Konverters nicht demontiert werden müssen, wobei gleichzeitig die Verbindungen zwischen .Tragring und Konvertergefäß leicht lösbar und nach erfolgtem Austausch wieder leicht verbindbar sind.The invention has set itself the task of avoiding this disadvantage, reducing the dimensions of the storage and designing such that the individual bearing elements do not have to be dismantled when removing the converter, while at the same time the connections between the support ring and the converter vessel are easily detachable and after exchange is easily connectable again.
Die Lösung der Aufgabe besteht darin, die Lagerung und Befestigung eines kippbaren Gefäßes oder Konverters der eingangs bezeichneten Art derart auszubilden, daß der Tragring nach oben oder unten herausgeführte Kastenwände aufweist, in denen jeweils eine Tragachse parallel zu der mit Abstand senkrecht unterhalb oder oberhalb der am Konvertermantel befestigten Konsole angeordnet ist, und die Lagergehäuse der den Tragachsen zugeordneten Gelenklager an der Ober- oder Unterseite der Konsolen anliegen, und daß an den Lagergehäusen Klappschrauben angelenkt und in Schlitzen durch die Konsolen hindurchgeführt sind.The solution to the problem is to design the storage and attachment of a tiltable vessel or converter of the type mentioned above in such a way that the support ring has box walls which lead upwards or downwards, in each of which a support axis is parallel to the one at a distance vertically below or above the Converter jacket attached console is arranged, and the bearing housing of the pivot bearing associated with the support axles abut the top or bottom of the brackets, and that hinged screws are articulated to the bearing housings and are guided in slots through the brackets.
Bei einer Ausführung der Lagerung kann das Konvertergefäß stehend auf dem Tragring befestigt werden. Dabei sind die Konsolen am Konvertermantel oberhalb des Tragringes angeordnet und die nach oben herausgeführten Kastenwände nehmen die Tragachsen mit Lagern auf, wobei die Lagergehäuse an der Unterseite der Konsolen anliegen.When carrying out the storage, the converter vessel can be fixed upright on the support ring. The brackets are arranged on the converter jacket above the support ring and the box walls leading upwards accommodate the support axles with bearings, the bearing housings abutting the underside of the brackets.
Gemäß einer anderen Ausführung kann das Konvertergefäß hängend am Tragring befestigt sein. In diesem Falle sind die Konsolen am Konvertermantel unterhalb des Tragringes angeordnet. Im Bereich der lösbaren Stütz- und Verbindungselemente sind die Kastenwände des Tragrings nach unten herausgeführt. Die Tragachsen befinden sich oberhalb der Konsolen und die Lagergehäuse liegen auf der Oberseite der Konsolen auf.According to another embodiment, the converter vessel can be attached to the support ring in a hanging manner. In this case, the brackets are arranged on the converter jacket below the support ring. In the area of the releasable supporting and connecting elements, the box walls of the support ring are led out downwards. The support axles are located above the brackets and the bearing housings are on the top of the brackets.
Der Ausbau des Gefäßes erfolgt im allgemeinen nach Lösen der Verbindungselemente und geringem Anheben des Gefäßes bei stehender Ausführung bzw. geringem Absenken des Gefäßes bei hängender Ausführung nach der offenen Seite des Tragringes in horizontaler Richtung.The vessel is generally removed after the connecting elements have been loosened and the vessel has to be lifted slightly in a standing version or the vessel has been lowered slightly in a hanging version towards the open side of the support ring in the horizontal direction.
Ist der Konverter mit einem seitlichen Ausguß versehen, und ist auf der Ausgußseite keine Lagerung am Tragring vorgesehen, um die Wärmeeinwirkung des flüssigen Gefäßinhaltes von der Lagerung fernzuhalten und um Beschädigungen durch Spritzer des flüssigen Metalles zu vermeiden, und erfolgt das Auswechseln des Gefäßes aus Platzgründen in der dem Ausguß gegenüberliegenden Richtung, wird bei hängender Anordnung nach Lösen der Verbindungselemente und geringem Absenken der Tragring um die Konverterkippzapfen um 90° nach oben geschwenkt und das Gefäß mit einem Konverterwechselwagen zu einem Reparaturstand verfahren.If the converter is provided with a side spout, and there is no bearing on the support ring on the spout side in order to keep the heat of the liquid vessel contents away from the storage and to avoid damage from splashes of the liquid metal, and the vessel is replaced for space reasons in the direction opposite the spout, is pivoted upwards in a hanging arrangement after loosening the connecting elements and slightly lowering the support ring around the converter pivot pin and the vessel is moved to a repair stand with a converter change carriage.
Die schwenkbare Anordnung des Tragringes für den Konverterwechsel und die Notwendigkeit der Zuführung zahlreicher Medien für das Frischeverfahren können zu Engpässen bei der Verlegung der Leitungen führen. Daher wird in diesem Falle vorgeschlagen, den hufeisenförmigen Tragring abzuwinkeln und die in der Kippebene des Konverters liegende Konsole auf der Ausgußseite zwischen der Ausgußöffnung und dem abgewinkelten Tragring am Konvertermantel zu befestigen.The pivoting arrangement of the support ring for changing the converter and the need to supply numerous media for the freshness process can lead to bottlenecks when laying the cables. It is therefore proposed in this case to bend the horseshoe-shaped support ring and the console lying in the tilting plane of the converter on the spout side between the pouring spout and the angled support ring on the converter jacket.
Ein Auswechseln des Konvertergefäßes in dem Ausguß gegenüberliegender Richtung ist bei dem nach dieser Seite offenen Tragring somit leicht möglich. Die auf der Ausgußseite liegende Konsole und die zugeordnete Lagerung sind infolge des größeren Abstands von der Ausgußöffnung nicht gefährdet. Außerdem sind bei der stehenden Anordnung die Klappschrauben in der Blasstellung des Konverters nicht zusätzlich durch das Gefäßgewicht belastet.A replacement of the converter vessel in the spout opposite direction is thus easily possible with the support ring open on this side. The console lying on the spout side and the associated storage are not endangered due to the greater distance from the spout opening. In addition, in the standing arrangement, the folding screws in the blowing position of the converter are not additionally loaded by the weight of the container.
Die Erfindung wird anhand eines in der Zeichnung schematisch dargestellten Ausführungsbeispiels näher erläutert. Es zeigen :
- Figur 1 einen Konverter mit hufeisenförmigem Tragring, unterhalb angeordneter Lagerung und Konsolen ;
Figur 2 einen Konverter mit abgewinkeltem Tragring, oberhalb angeordneter Lagerung und Konsolen ;- Figur 3 einen Ausschnitt des Tragringes mit der Lagerung in größerem Maßstab ;
Figur 4 einen Schnitt nach der Linie IV-IV der Fig. 3.
- Figure 1 shows a converter with a horseshoe-shaped support ring, storage and consoles arranged below;
- Figure 2 shows a converter with an angled support ring, storage and consoles arranged above;
- Figure 3 shows a detail of the support ring with the storage on a larger scale;
- 4 shows a section along the line IV-IV of FIG. 3rd
Der in Fig. 1 dargestellte Konverter 1 ist an einem hufeisenförmigen.Tragring 3a hängend befestigt. Die Klappschrauben 8 stellen mit einer dem Konvertergegewicht entsprechenden Vorspannung die kraftschlüssige Verbindung zwischen den Lagergehäusen 5 und den unterhalb am Konvertermantel1a angeordneten Konsolen 2 her.The converter 1 shown in FIG. 1 is suspended from a horseshoe-
Gemäß Fig. 2 stützt sich der Konverter 1 mit seinen Konsolen 2 auf einem hufeisenförmigen, abgewinkelten Tragring 3b ab.2, the converter 1 is supported with its
Dabei ist die in der Kippebene liegende Konsole 2 auf der Ausgußseite zwischen der Ausgußöffnung und dem abgewinkelten Tragring 3b angeordnet. Die Tragachsen 7 und die Lagerungen 5, 6 befinden sich in nach oben herausgeführten Kastenwänden 9 des Tragringes 3b unterhalb der Konsolen. Die kraftschlüssige Verbindung zwischen Konverter 1 und Tragring 3b erfolgt mittels Klappschrauben 8.The
In der vergrößerten Darstellung gemäß Fig. 3 bezeichnet 1a den Konvertermantel, an dem die Konsolen 2 befestigt sind. In den nach unten bzw. nach oben (nicht gezeichnet) herausgeführten Kastenwänden 9 des Tragringes 3a oder 3b sind die 'Tragachsen 7 mittels Achshaltern fest gelagert. Die an beiden Enden abgestützten Tragachsen 7 weisen gegenüber den bekannten, am Konvertermantel angeordneten Stützzapfen geringere Abmessungen auf und sind weitgehend unbeeinflußt von der Erwärmung des Konvertermantels. Die Tragachsen 7 nehmen handelsübliche, in Gehäusen 5 eingeschlossene Gelenklager 6 auf. Der Abstand zwischen dem Gehäuse 5 und den Kastenwänden 9 sowie die pendelnde Lagerung gewährleisten eine zwangsfreie Bewegung in allen Richtungen bei Wärmedehnungen des Konverters. Die Verwendung handelsüblicher Gelenklager bedeutet eine kostengünstige Lösung.In the enlarged representation according to FIG. 3, 1a denotes the converter jacket to which the
Fig. 4 zeigt einen Schnitt durch die Lagerung in der Schnittebene IV-IV der Fig. 3. An dem Lagergehäuse 5 sind in Taschen Klappbolzen 8 schwenkbar angelenkt, die in Schlitze der Konsolen 2 eingreifen. Die Klappschrauben 8 sind so ausgelegt, daß sie das gesamte Gewicht des Konverters aufnehmen können und eine sichere Verbindung zwischen den Lagergehäusen 5 und den Konsolen 2 gewährleisten. Die Anzahl der Klappschrauben 8 pro Lagerstelle ist abhängig von der Größe und dem Gewicht des Konverters.Fig. 4 shows a section through the storage in the section plane IV-IV of Fig. 3. On the bearing
Claims (4)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2947814 | 1979-11-28 | ||
| DE19792947814 DE2947814C2 (en) | 1979-11-28 | 1979-11-28 | Converter storage and fastening on the support ring |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0029878A1 EP0029878A1 (en) | 1981-06-10 |
| EP0029878B1 EP0029878B1 (en) | 1983-04-13 |
| EP0029878B2 true EP0029878B2 (en) | 1987-10-21 |
Family
ID=6087022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19800104856 Expired EP0029878B2 (en) | 1979-11-28 | 1980-08-16 | Supporting and anchoring of a convertor on a trunnion ring |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0029878B2 (en) |
| DE (1) | DE2947814C2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT412478B (en) * | 2003-11-11 | 2005-03-25 | Voest Alpine Ind Anlagen | Tiltable metallurgical vessel e.g. converter, is detachably fixed with hydraulically-operated clamping devices at support ring that partly surrounds vessel, where each clamping device includes one self-locking clamping unit |
| EP3502282A1 (en) | 2017-12-20 | 2019-06-26 | Primetals Technologies Austria GmbH | Tiltable metallurgical vessel and method for fixing and releasing tiltable metallurgical vessel |
| CN115875699B (en) * | 2022-11-30 | 2023-11-21 | 常熟市林茂机械设备有限公司 | Multi-furnace-body connecting structure with anti-seismic performance |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT251618B (en) * | 1962-12-04 | 1967-01-10 | Demag Ag | Tilting or swiveling converter with cardan bearing |
| FR1468079A (en) * | 1966-02-11 | 1967-02-03 | Voest Ag | Device forming a removable support for crucibles or converters or the like and their various applications |
| DE1946246C3 (en) * | 1968-10-08 | 1985-06-20 | Voest-Alpine Ag, Wien | Converter with one-sided open or divisible support frame |
| DE1946892B2 (en) * | 1969-09-16 | 1976-09-09 | Wsesojusny nautschno-issledowatelskij i projektno-konstruktorsky institut metallurgitscheskowo maschinöstrojenia, Moskau | CONVERTER |
| FR2069920A1 (en) * | 1969-12-05 | 1971-09-10 | Inst Metall | Steel converter anchoring in carrier ring |
| BE758262A (en) * | 1970-04-16 | 1971-04-01 | Voest Ag | TILTING CRUCER OR CONVERTER |
-
1979
- 1979-11-28 DE DE19792947814 patent/DE2947814C2/en not_active Expired
-
1980
- 1980-08-16 EP EP19800104856 patent/EP0029878B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2947814C2 (en) | 1989-04-27 |
| EP0029878A1 (en) | 1981-06-10 |
| EP0029878B1 (en) | 1983-04-13 |
| DE2947814A1 (en) | 1981-07-23 |
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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| AK | Designated contracting states |
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| ITCL | It: translation for ep claims filed |
Representative=s name: BARZANO' E ZANARDO MILANO S.P.A. |
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| 17P | Request for examination filed |
Effective date: 19810624 |
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| ITF | It: translation for a ep patent filed | ||
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| AK | Designated contracting states |
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