EP0473521A1 - Verfahren und Vorrichtung zum Fördern von pulverförmigem oder körnigem Material in eine Stranggussform - Google Patents

Verfahren und Vorrichtung zum Fördern von pulverförmigem oder körnigem Material in eine Stranggussform Download PDF

Info

Publication number
EP0473521A1
EP0473521A1 EP91470022A EP91470022A EP0473521A1 EP 0473521 A1 EP0473521 A1 EP 0473521A1 EP 91470022 A EP91470022 A EP 91470022A EP 91470022 A EP91470022 A EP 91470022A EP 0473521 A1 EP0473521 A1 EP 0473521A1
Authority
EP
European Patent Office
Prior art keywords
valve
hopper
powder
opening
detector
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
EP91470022A
Other languages
English (en)
French (fr)
Other versions
EP0473521B1 (de
Inventor
Ghislain Hubert
Patrick Ominetti
André Klein
Raymond Pilloy
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.)
Sollac SA
Techmetal Promotion SA
Original Assignee
Sollac SA
Techmetal Promotion SA
Lorraine de Laminage Continu SA SOLLAC
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 Sollac SA, Techmetal Promotion SA, Lorraine de Laminage Continu SA SOLLAC filed Critical Sollac SA
Priority to AT91470022T priority Critical patent/ATE100005T1/de
Publication of EP0473521A1 publication Critical patent/EP0473521A1/de
Application granted granted Critical
Publication of EP0473521B1 publication Critical patent/EP0473521B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B22D11/10—Supplying or treating molten metal
    • 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
    • B22D11/10—Supplying or treating molten metal
    • B22D11/108—Feeding additives, powders, or the like

Definitions

  • the present invention relates to the continuous casting of metals and in particular steel.
  • the invention relates to the supply and the deposition on the surface of the liquid metal in a continuous casting mold, of a layer of a powdery or granulated material, this material having in particular the function of thermally insulating the metal bath in fusion, to avoid reoxidation of the metal and to provide lubrication of the walls of the mold.
  • this material will hereinafter be called “powder”, it being understood that its particle size and the shape of the grains can vary widely.
  • This powder is liquefied on contact with the liquid metal and infiltrates between the metal and the walls of the mold, thus playing the role of lubricant.
  • This device makes it possible to ensure an automatic supply of powder, because when the thickness of the latter tends to decrease, the powder flows in the conduit by gravity until the upper level of the layer reaches the level of the discharge port of the conduit, thereby interrupting the flow.
  • this takes advantage of the ability of the powder to spread substantially uniformly over the entire section of the ingot mold while taking advantage of the characteristics of the pin materials which are deposited in heaps at the outlet of the conduit. power supply.
  • This system makes it possible to know the average powder consumption, for example for a casting, by measuring the quantity of powder introduced into the feed hopper.
  • instant consumption or over short periods, cannot be determined.
  • the invention aims to solve this problem, and therefore to know the instantaneous consumption of powder, to enable this consumption to be linked with instantaneous casting conditions such as extraction speed, casting temperature, nature of the powder, frequency and amplitude of the mold's oscillations, and the parameters specific to each casting such as format of the cast product, nature of the metal, etc.
  • the invention relates to a supply device, for depositing on the surface of a liquid metal contained in a continuous casting mold, a layer of a powdery or granulated material, comprising a supply conduit of which a permanently open lower discharge end is situated above said surface of the metal at a height equal to or slightly greater than a target thickness of the layer of said material, and means for permanent supply of said material in said conduit.
  • this device is characterized in that it comprises an upper main hopper provided with a drain pipe, the lower end of which penetrates, without being rigidly connected to it, in a lower secondary hopper opening into the conduit of supply, a shut-off valve and a material flow detector, placed on the drainage pipe, means for controlling the valve according to the indications provided by the flow detector, means for weighing the upper hopper, and calculation means for determining the material flow as a function of the time between two successive closings or openings of said valve, and of the quantity of material flowing from the upper hopper into the lower hopper.
  • the invention also relates to a method of feeding and depositing, on the surface of a liquid metal contained in a continuous casting mold, and during casting, a layer of a powdery or granulated material.
  • the lower end of the supply duct is positioned above the surface of the metal at a height equal to or slightly greater than a set thickness of the layer of said material, it is filled the upper hopper with said material, and, in order to continuously measure the consumption of said material during the casting of said metal, the valve is controlled to close each time the flow detector indicates a zero flow, the time t is recorded at each closure or opening, and, after each valve closure, the weighing of the upper hopper and the measured value is recorded, and the material consumption is deduced therefrom during each time interval between two successive closings or openings of the valve.
  • the valve is ordered to open after a predetermined period, starting from its closing. It is then possible to determine the consumption of material throughout the casting, at constant predetermined time intervals, or variable as a function of the progress of the casting.
  • a detector for the presence of the material in the lower hopper is used, located at a predetermined distance below the end of the drain piping, and the valve is opened when this detector indicates an absence. of material, i.e. the lower hopper has emptied to the level of the presence detector.
  • a continuous casting mold 1 supplied with liquid metal 2, conventionally by means of supply, not shown.
  • a layer of covering powder 3 which melts on contact with the metal, forming a liquid film 4 of slag which gradually flows towards the walls of the mold and infiltrates between them and the metal, where it acts as a lubricant.
  • the powder supply is ensured by a supply conduit 10 which opens by its lower end 11 open continuously, above the surface of the metal at a height equal to or slightly greater than a set thickness of the powder layer and slag.
  • This conduit being permanently supplied with powder, the latter pours into the mold until the layer thus formed comes to close the orifice 11, thus interrupting the arrival of powder.
  • the invention aims to allow the almost instantaneous measurement, relative to the duration of a pour, of the consumption of powder.
  • the device comprises a main hopper 13 provided with load cells 14.
  • This main hopper carries at its lower part a drain pipe 15 on which is placed a flow detector 16 and, under the latter, a valve 17.
  • the lower end of the pipe 15 penetrates, without being rigidly fixed thereto, into a secondary hopper 18 of lower capacity, the outlet orifice of which is connected to the supply conduit 10.
  • the load cells 14, the flow detector 16, and the valve 17 are connected to a control and command cabinet 19, itself connected by the link 20 to a process computer of the installation, not shown, and to means of visualization or graphical representation 21.
  • the main hopper 13 being filled with powder 22 and the valve 17 being open, the powder flows into the secondary hopper 18 then is directed by the supply conduit 10 into the ingot mold, where it spreads over the surface of the metal 2 until the powder layer 3 arrives substantially at the orifice 11 at the end of the conduit 10 and blocks the flow, as explained above.
  • the powder then fills the conduit 10 then the intermediate hopper 18 until the level of the powder in this hopper reaches the lower end of the tubing 15 blocking, in a similar manner to that which occurs in the mold. flow in this piping.
  • the device can then operate in two different ways, corresponding respectively to the two variants mentioned above.
  • the opening of the valve 17 is controlled after a predetermined period from its closing.
  • the level of powder therein drops, allowing the powder contained in the conduit 10 and the hopper to flow.
  • the level of powder falling in this hopper 18 releases the lower orifice piping 15, the part located under the valve 17 is empty.
  • the internal volume of the pipe part 15 located under the valve 17 is preferably determined to be as small as possible, there is no there is more interaction between the main hopper and the secondary hopper; the weighing of the main hopper is then carried out by means of load cells 14, and the value of the measurement recorded.
  • the opening of the valve 17 is controlled, the powder flows again into the piping 15 and fills the secondary hopper 18 up to again blocking the flow, the process then repeating in a similar manner.
  • the flow rate or the consumption of powder can then be easily calculated from the time between two successive closings or openings of the valve and from the difference between two corresponding successive weighings, this calculation being carried out by the control apparatus. and regulation and / or the process computer of the casting installation, and the results presented by the display device 21 for example in the form of a consumption curve as a function of time.
  • valve closing time may not be validated until just before the next opening.
  • the closing time will preferably be short, in order to have the shortest possible reaction time on the process, being indeed understood that the consumption at a given instant can only be evaluated at the end of the device operating cycle, that is to say practically only when the opening of the valve 17 is controlled to complete the secondary hopper.
  • the device further comprises a detector 23 of the presence of powder, placed on the secondary hopper or on the supply duct, and also connected to the control cabinet 19. In this case the opening of the valve 17 is controlled when the presence detector 23 signals an absence of powder.
  • the device then operates in the following manner, starting from the phase shown in the drawing.
  • the powder level in the secondary hopper drops until reaching the presence detector 23, which then sends to the control cabinet 19 a signal of absence of powder, which in turn causes the opening of the valve 17.
  • the powder then fills the secondary hopper 18 up to the level of the lower end of the pipe 15, blocking the flow in this pipe.
  • the flow detector 16 then reacts and controls the closing of the valve.
  • the quantity of powder consumed in each cycle is substantially constant, since corresponding to the volume of the hopper 18 and of the pipes, between the presence detector 23 and the valve 17, to the quantity close to the powder consumed between the moment of absence detection by the detector 23 and the end of filling of the secondary hopper.
  • the time between two successive openings or closings of the valve varies according to the consumption in the mold.
  • the presence detector 23 will be placed far enough upstream of the end 11 of the conduit 10, to avoid, in the event of significant consumption, a break in the supply of powder to the ingot mold, which could be due to a possible delay. in the powder flow between the absence detection and the arrival of powder in this conduit.
  • the presence detector 23 could also be placed directly on the hopper 18 without the principle of operation of the device being modified.
  • the secondary hopper 18 can also be constituted by the upper end of the supply duct, which will then be sufficiently flared to allow penetration of the lower end of the piping 15.
EP91470022A 1990-08-27 1991-08-16 Verfahren und Vorrichtung zum Fördern von pulverförmigem oder körnigem Material in eine Stranggussform Expired - Lifetime EP0473521B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT91470022T ATE100005T1 (de) 1990-08-27 1991-08-16 Verfahren und vorrichtung zum foerdern von pulverfoermigem oder koernigem material in eine stranggussform.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9010756A FR2666035A1 (fr) 1990-08-27 1990-08-27 Procede et dispositif d'alimentation d'un materiau poudreux ou granule dans une lingotiere de coulee continue.
FR9010756 1990-08-27

Publications (2)

Publication Number Publication Date
EP0473521A1 true EP0473521A1 (de) 1992-03-04
EP0473521B1 EP0473521B1 (de) 1994-01-12

Family

ID=9399920

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91470022A Expired - Lifetime EP0473521B1 (de) 1990-08-27 1991-08-16 Verfahren und Vorrichtung zum Fördern von pulverförmigem oder körnigem Material in eine Stranggussform

Country Status (13)

Country Link
US (1) US5158129A (de)
EP (1) EP0473521B1 (de)
JP (1) JP2882556B2 (de)
KR (1) KR100205475B1 (de)
AT (1) ATE100005T1 (de)
AU (1) AU646685B2 (de)
BR (1) BR9103667A (de)
DE (1) DE69100986T2 (de)
DK (1) DK0473521T3 (de)
ES (1) ES2050045T3 (de)
FR (1) FR2666035A1 (de)
RU (1) RU2046691C1 (de)
ZA (1) ZA916737B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995015234A1 (fr) * 1993-11-30 1995-06-08 Techmetal Promotion Dispositif d'alimentation pour le depot par simple gravite d'un materiau granuleux sur la surface d'un metal liquide coule en continu
CN105057615A (zh) * 2015-07-30 2015-11-18 江苏永钢集团有限公司 结晶器保护渣添加装置
CN107470591A (zh) * 2017-08-07 2017-12-15 攀钢集团研究院有限公司 用于模铸辅料的加入装置及其加入方法

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE515012C2 (sv) * 1994-06-17 2001-05-28 Sandvik Ab Matning av gjutpulver
US5647908A (en) * 1995-02-15 1997-07-15 Foseco International Limited Applicator for surface treatment agent for continuous casting process
AT403555B (de) * 1996-04-16 1998-03-25 Voest Alpine Stahl Donawitz Verfahren und vorrichtung zum aufbringen von giesspulver auf den giessspiegel beim stranggiessen
US6474398B1 (en) * 1998-09-16 2002-11-05 Stollberg, Inc. Apparatus for introducing granular mold flux onto the top of a slab being cast within a continuous casting mold
ES2173015B1 (es) * 1999-10-19 2003-09-01 Sidenor Ind S L Sistema automatico de adicion de polvos de colada en la fabricacion de acero mediante colada continua.
KR100466175B1 (ko) * 2000-12-26 2005-01-13 주식회사 포스코 연속주조기의 몰드플럭스 자동주입장치
KR100775090B1 (ko) * 2006-08-07 2007-11-08 주식회사 포스코 몰드 플럭스 투입장치
US8840357B2 (en) * 2011-07-20 2014-09-23 Deere & Company Material transfer system
ES2733680T3 (es) * 2011-09-29 2019-12-02 Stollberg Inc Sistema y método para monitorizar el consumo de castina de molde
KR102550132B1 (ko) * 2016-11-08 2023-06-30 재단법인 포항산업과학연구원 마모 저항성 시험 장치
CN106862502B (zh) * 2017-03-28 2020-08-18 江苏苏美达铝业有限公司 一种自动化重力铸造轮毂加工装置
CN108213362A (zh) * 2017-12-29 2018-06-29 浙江杭机铸造有限公司 一种铸造用炉前称量加料装置及其加料方法
CN113600764A (zh) * 2021-08-20 2021-11-05 重庆大朗冶金新材料有限公司 一种硅锰粉料熔兑装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2816867A1 (de) * 1977-04-18 1978-10-19 Centro Speriment Metallurg Verfahren und vorrichtung zum einfuehren von pulvern in eine stranggiess- form
FR2407773A1 (fr) * 1977-11-04 1979-06-01 Concast Ag Dispositif pour alimenter le bain d'acier d'une lingotiere de coulee continue en fondant en poudre
GB2024029A (en) * 1978-06-28 1980-01-09 British Cast Iron Res Ass Means for adding materials to a flowing stream of molten metal
DE3031503A1 (de) * 1979-09-20 1981-04-09 Centro Sperimentale Metallurgico S.p.A., 00129 Roma Verfahren zum verhindern der auswirkungen eines durchbruchs (break-outs) bei stranggiessanlagen
GB2116092A (en) * 1982-03-05 1983-09-21 Lorraine Laminage Supplying the layer of flux powder in a continuous casting mold
FR2635029A1 (fr) * 1988-08-08 1990-02-09 Siderurgie Fse Inst Rech Dispositif d'alimentation automatique d'une lingotiere de coulee continue en produit poudreux ou granuleux

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1473044A (fr) * 1965-12-14 1967-03-17 Siderurgie Fse Inst Rech Procédé et dispositif pour l'obtention d'un débit de métal liquide constant
FR2041014B1 (de) * 1969-04-30 1974-06-14 Commissariat Energie Atomique
SU624705A2 (ru) * 1977-03-28 1978-08-09 Институт Проблем Литья Ан Украинской Сср Устройство дл ввода ферромагнитных дисперсных материалов в жидкий металл
SU1235624A1 (ru) * 1984-11-10 1986-06-07 Киевский институт автоматики им.ХХУ съезда КПСС Устройство дл автоматического измерени насыпной плотности формовочной смеси
JPS63123555A (ja) * 1986-11-14 1988-05-27 Nippon Steel Corp 連続鋳造用パウダ−供給方法及びその装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2816867A1 (de) * 1977-04-18 1978-10-19 Centro Speriment Metallurg Verfahren und vorrichtung zum einfuehren von pulvern in eine stranggiess- form
FR2407773A1 (fr) * 1977-11-04 1979-06-01 Concast Ag Dispositif pour alimenter le bain d'acier d'une lingotiere de coulee continue en fondant en poudre
GB2024029A (en) * 1978-06-28 1980-01-09 British Cast Iron Res Ass Means for adding materials to a flowing stream of molten metal
DE3031503A1 (de) * 1979-09-20 1981-04-09 Centro Sperimentale Metallurgico S.p.A., 00129 Roma Verfahren zum verhindern der auswirkungen eines durchbruchs (break-outs) bei stranggiessanlagen
GB2116092A (en) * 1982-03-05 1983-09-21 Lorraine Laminage Supplying the layer of flux powder in a continuous casting mold
FR2635029A1 (fr) * 1988-08-08 1990-02-09 Siderurgie Fse Inst Rech Dispositif d'alimentation automatique d'une lingotiere de coulee continue en produit poudreux ou granuleux

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SOVIET INVENTIONS ILLUSTRATED, semaine B28, 22 août 1979, section Mechanical, résumé no. 52160B/28, Derwent Publications Ltd, Londres, GB; & SU-A-624 705 (UKR CAST PROBLEM) 29-08-1978 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995015234A1 (fr) * 1993-11-30 1995-06-08 Techmetal Promotion Dispositif d'alimentation pour le depot par simple gravite d'un materiau granuleux sur la surface d'un metal liquide coule en continu
FR2713116A1 (fr) * 1993-11-30 1995-06-09 Techmetal Promotion Dispositif d'alimentation pour le dépôt par simple gravité d'un matériau granuleux sur la surface d'un métal liquide coulé en continu.
CN105057615A (zh) * 2015-07-30 2015-11-18 江苏永钢集团有限公司 结晶器保护渣添加装置
CN105057615B (zh) * 2015-07-30 2017-04-12 江苏永钢集团有限公司 结晶器保护渣添加装置
CN107470591A (zh) * 2017-08-07 2017-12-15 攀钢集团研究院有限公司 用于模铸辅料的加入装置及其加入方法

Also Published As

Publication number Publication date
AU646685B2 (en) 1994-03-03
DE69100986D1 (de) 1994-02-24
FR2666035B1 (de) 1994-12-16
AU8273991A (en) 1992-03-05
ES2050045T3 (es) 1994-05-01
US5158129A (en) 1992-10-27
JP2882556B2 (ja) 1999-04-12
JPH04253554A (ja) 1992-09-09
ZA916737B (en) 1993-04-28
DK0473521T3 (da) 1994-05-16
FR2666035A1 (fr) 1992-02-28
BR9103667A (pt) 1992-05-19
ATE100005T1 (de) 1994-01-15
DE69100986T2 (de) 1994-07-21
EP0473521B1 (de) 1994-01-12
KR100205475B1 (ko) 1999-07-01
RU2046691C1 (ru) 1995-10-27
KR920004061A (ko) 1992-03-27

Similar Documents

Publication Publication Date Title
EP0473521B1 (de) Verfahren und Vorrichtung zum Fördern von pulverförmigem oder körnigem Material in eine Stranggussform
EP0406092A1 (de) Vorrichtung zum Füllen von Behältern mit abgewogenen Mengen
EP0204935B1 (de) Verfahren zum Kontrollieren der Beschickung eines Schachtofens
FR2579120A1 (fr) Procede et dispositif de mise en marche automatique d'une installation de coulee continue
WO2000023373A1 (fr) Procede de controle du remplissage de recipients avec un produit coulant et installation de remplissage mettant en oeuvre ce procede
FR2474362A1 (fr) Dispositif pour la coulee de metaux en fusion
FR2566297A1 (fr) Procede de coulee d'un bain metallique
EP0517629B1 (de) Vorrichtung und Verfahren zum Giessen von Halbzeug
EP0917906B1 (de) Verfahren und Vorrichtung zum Auflösen eines festen Produktes
EP0086145A1 (de) Durchflussmesser und Vorrichtung zum Mischen eines Zuschlagstoffes in eine Flüssigkeit mit einem derartigen Durchflussmesser
CA2136783A1 (fr) Dispositif pour delivrer, a cadence elevee, des doses d'un liquide
EP0998360B1 (de) Verfahren zum starten eines kontinuierlichen metall-giessprozesses
EP0229787B1 (de) Verfahren und automatische vorrichtung zur messung des gehalts an einem löslichen bestandteil in einem pulverartigen produkt
BE658990A (de)
EP0201379B1 (de) Verfahren und System zur Steuerung des Kippvorgangs eines Behälters mit flüssigem Metall
FR2595598A1 (fr) Procede de demarrage automatique de la coulee d'une barre dans des installations de coulee continue
WO1995015234A1 (fr) Dispositif d'alimentation pour le depot par simple gravite d'un materiau granuleux sur la surface d'un metal liquide coule en continu
EP0599750A1 (de) Verfahren zum automatischen Einblasen von Gas in den Kokillen-Aufsatz einer Multistranggiessanlage
FR2698806A1 (fr) Procédé de remplissage automatique d'une lingotière de coulée continue, en début de coulée, et dispositif pour sa mise en Óoeuvre.
CH717635A2 (fr) Machine de coulée automatique pour une fonderie et procédé de pilotage de coulée pour une telle machine.
CA1282382C (fr) Fondoir-doseur de haute precision pour materiau fusible ou liquide
BE880450A (fr) Perfectionnements a la fabrication d'aciers
JPS58221643A (ja) タンデイツシユ内のスラグ流出防止方法
FR2610855A1 (fr) Procede pour la coulee d'alliages ferreux
FR2951970A1 (fr) Procede de controle de grappe en sortie de moule, en fonderie sous pression

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES GB GR IT LI LU NL SE

17P Request for examination filed

Effective date: 19920723

17Q First examination report despatched

Effective date: 19921030

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE DK ES GB GR IT LI LU NL SE

REF Corresponds to:

Ref document number: 100005

Country of ref document: AT

Date of ref document: 19940115

Kind code of ref document: T

REF Corresponds to:

Ref document number: 69100986

Country of ref document: DE

Date of ref document: 19940224

ITF It: translation for a ep patent filed

Owner name: BUGNION S.P.A.

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19940321

REG Reference to a national code

Ref country code: GR

Ref legal event code: FG4A

Free format text: 3010871

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2050045

Country of ref document: ES

Kind code of ref document: T3

REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

EPTA Lu: last paid annual fee
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
EAL Se: european patent in force in sweden

Ref document number: 91470022.4

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GR

Payment date: 20030722

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20030728

Year of fee payment: 13

Ref country code: GB

Payment date: 20030728

Year of fee payment: 13

Ref country code: CH

Payment date: 20030728

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20030729

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 20030730

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20030731

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20030805

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20030807

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20030808

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DK

Payment date: 20030811

Year of fee payment: 13

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040816

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040816

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040816

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040817

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040817

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040831

Ref country code: DK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040831

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040831

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040831

BERE Be: lapsed

Owner name: *TECHMETAL PROMOTION

Effective date: 20040831

Owner name: *SOLLAC

Effective date: 20040831

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050301

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050301

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050303

EUG Se: european patent has lapsed
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20040816

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20050301

REG Reference to a national code

Ref country code: DK

Ref legal event code: EBP

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050816

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20040817

BERE Be: lapsed

Owner name: *TECHMETAL PROMOTION

Effective date: 20040831

Owner name: *SOLLAC

Effective date: 20040831