EP0640413B1 - Installation de laminage - Google Patents

Installation de laminage Download PDF

Info

Publication number
EP0640413B1
EP0640413B1 EP19940890135 EP94890135A EP0640413B1 EP 0640413 B1 EP0640413 B1 EP 0640413B1 EP 19940890135 EP19940890135 EP 19940890135 EP 94890135 A EP94890135 A EP 94890135A EP 0640413 B1 EP0640413 B1 EP 0640413B1
Authority
EP
European Patent Office
Prior art keywords
rolling
arrangement according
rotor
stand
stock
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.)
Revoked
Application number
EP19940890135
Other languages
German (de)
English (en)
Other versions
EP0640413A1 (fr
Inventor
Gerlinde Dipl.-Ing. Djumlija
Friedrich Moser
Johann Oberhumer
Heinrich Pühringer
Klaus Dipl.-Ing. Dr. Zeman
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.)
Primetals Technologies Austria GmbH
Original Assignee
Voest Alpine Industrienlagenbau GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=3519041&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0640413(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Voest Alpine Industrienlagenbau GmbH filed Critical Voest Alpine Industrienlagenbau GmbH
Publication of EP0640413A1 publication Critical patent/EP0640413A1/fr
Application granted granted Critical
Publication of EP0640413B1 publication Critical patent/EP0640413B1/fr
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
    • B21B45/08—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing hydraulically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
    • B21B1/463—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/14—Guiding, positioning or aligning work
    • B21B39/16—Guiding, positioning or aligning work immediately before entering or after leaving the pass

Definitions

  • the invention relates to a rolling device with a roll stand and an upstream descaling device.
  • the device provided for carrying out the cooling process according to DE-C - 41 34 599 has spray nozzles which are arranged at a greater distance from the rolls of the roll stand and by means of which coolant is sprayed obliquely against the surface of the rolling stock in the direction of the roll gap, so that part of the coolant jet hits the surface of the rolling stock and part of the surface of the roll.
  • spray nozzles which are arranged at a greater distance from the rolls of the roll stand and by means of which coolant is sprayed obliquely against the surface of the rolling stock in the direction of the roll gap, so that part of the coolant jet hits the surface of the rolling stock and part of the surface of the roll.
  • a descaling device for the online rolling of a cast strand, as is known from rolling mill technology - for example presented by US-A-5,001,915.
  • rolling mill technology for example presented by US-A-5,001,915.
  • it has been found that, in order to achieve effective descaling, large quantities of water must be sprayed onto the cast strand, which leads to a relatively high temperature drop in the cast strand, in particular its surface areas, so that the descaling process known from rolling mill technology is suitable for the descaling of on-line rolled cast strands, especially because of the very low rolling speed ( casting speed), cannot be achieved without disadvantages.
  • the invention therefore has as its object to provide a rolling device with a roll stand and a pre-descaling device which meets the diverging requirements - namely perfect surface quality through complete scaling removal and as little liquid application as possible.
  • the rotor descaling device works primarily by mechanically removing the scale. This removal is promoted by quenching the scale by the liquid jets, which breaks up the scale skin.
  • a mechanical scale breaker such as a bending device, can advantageously be provided in front of the rotor descaling device to assist in breaking up the scale skin.
  • Rotor descaling devices are known per se, for example from DE-A-31 25 146 for descaling hot steel blocks.
  • a spray bar extending across the entire width of the steel block to its surface and parallel is set in rotation about an axis directed perpendicular to its longitudinal extent.
  • the planes placed through the axis of the liquid jets and parallel to an axis of one of the rolls of the roll stand always form an acute angle with the rolling direction placed at the point of impact of the liquid jet on the surface of the rolling stock, the tip of which is opposite to the rolling direction
  • the rotor axis (s) of the rotor descaling device is / are arranged inclined with respect to the surface of the rolling stock, the angle of inclination of the rotor axis advantageously being opposite a straight line perpendicular to the surface of the rolling stock is greater than the angle that the axis of a liquid jet forms with the rotor axis.
  • a particularly short arrangement of the descaling device in front of the rolls of the roll stand can be achieved if a portion of the spray area generated by the liquid jets of the rotor descaling device is shielded from the surface of the rolling stock.
  • a cover plate with a liquid drainage channel which extends across the surface of the rolling stock, is expediently provided to shield the partial area.
  • the cover plate seen in plan view, advantageously covers a spray area directed against the roll gap of the roll stand.
  • the cover is expediently provided with a rolling stock catching or rolling stock guide device directed against the rolling direction for the safe introduction of the rolling stock start into the roll gap.
  • the catching or guiding device is advantageously formed by a sheet metal plate extending parallel to one of the axes of the rolls of the roll stand, in which at least one recess is provided for the passage of the liquid jets emerging from the rotor descaling device.
  • the recess is also advantageously designed in the form of a part of a circular ring.
  • a particularly important embodiment is characterized in that the roll stand is designed for rolling a cast strand, in particular a thin strand, the roll stand advantageously being integrated into a continuous casting installation.
  • the rolling device according to the invention allows the rotor descaling device to be arranged within the roll stand of the roll stand.
  • the rotor descaling device expediently has two or more rotor heads arranged approximately parallel to the axes of the rolls of the roll stand.
  • a transverse spraying device is provided in the immediate feed region of the rolls of the roll stand, preferably in the case of the presence of a spraying area cover plate, the transverse spraying device between the cover plate and the surface of the rolling stock is provided.
  • FIG. 1 illustrating a continuous casting installation with an integrated rolling device in a schematic illustration in a side view.
  • FIG. 2 shows a detail II of FIG. 1 on an enlarged scale according to a first embodiment.
  • FIG. 3 illustrates a second embodiment in a representation analogous to FIG. 2.
  • FIG. 4 is a view along line IV-IV of FIG. 3.
  • a cooled continuous casting mold which is designated by 1, is fed with liquid steel 2, which is fed from an intermediate vessel 3.
  • the cast strand 4 which forms in the mold 1 and has a liquid core and initially only a thin strand shell is diverted into the horizontal strand guide 7 via an arcuate strand support device 5 which is provided with closely adjacent support rollers 6.
  • the arcuate strand support device 5 and the first part of the horizontal strand guide 7 are surrounded by a cooling chamber 8, which contains the secondary cooling zone.
  • the cast strand (which has a thickness of approximately 60 mm) becomes a rolling device 9 (in which it is reduced to approximately 40 mm thickness), which is formed by a roll stand 10 and an upstream descaling device 11 , forwarded.
  • a separating device 12 is provided for separating the solidified and deformed cast strand 4 in slabs 13. If the cast strand 4 is processed into thin strip, the separation takes place according to the desired coil weight.
  • the separated slabs 13 are fed to a roller hearth furnace, not shown, in which the thin slabs are kept at the rolling temperature or, if appropriate, heated to this temperature, the roller hearth furnace also taking over the function of buffering the thin slabs for malfunctions. Rolling out to thin strip then takes place in a multi-stand finishing train, also not shown.
  • the descaling device 11 is arranged directly in front of the work rolls 14 of the roll stand 10, etc. in the area between the side walls 15 of the roller stand 16.
  • the descaling device 11 is designed as a rotor descaling device, the number of rotor heads 17 of the rotor descaling device 11 being selected according to the width of the cast strand 4. If several rotor heads 17 are provided, these are arranged side by side in a plane parallel to the axes 18 of the work rolls 14 of the roll stand 10 (cf. FIG. 4).
  • Each rotor head 17 has at least one rotating spray arm 19, which is preferably designed as a double spray arm 19 and extends radially and at the ends of which spray nozzles 20 are arranged.
  • a rotating plate can also be provided, on the circumference of which spray nozzles are arranged.
  • the axes 22 of the liquid jets 21 emerging from the spray nozzles 20 form an acute angle ⁇ with the rotor axis 23 of the associated rotor head 17.
  • the liquid jets 21 enter a housing 28 covering the surface 24 of the cast strand 4 in the region of the descaling device 11 immediately after exiting the spray nozzles 20 through an opening 27.
  • This housing 28 is provided with a shielding wall 29 opposite the roll gap 30 formed by the work rolls 14, so that almost no spray water can be whirled against the roll gap 30.
  • a transverse spray 31 is also provided, which makes it possible to remove any scale particles that may be swirling around.
  • the cross-spray 31 further reduces post-scaling due to reheating, which could possibly occur due to the very small amount of liquid that is applied by the rotor descaling device 11
  • the rotor heads 17 are arranged with rotor axes 23 arranged perpendicular to the surface 24 of the cast strand 4, as a result of which the liquid jets 21 extend over a partial area 32 of the liquid jets 21 Formed impact circle 33 would be directed against the roll gap 30.
  • a shield is provided in this region 32, which is formed by a cover plate 34 extending transversely across the surface 24 of the cast strand 4.
  • This cover plate 34 has a liquid drainage channel 35 which drains off the liquid collecting on this cover plate 34.
  • a catching and guiding device which is shown in dash-dot lines in FIGS. 3 and 4, is provided according to a preferred embodiment, which is parallel to one another the axes 18 of the work rolls 14 of the roll stand 10 extending sheet metal plate 34 'is formed.
  • This sheet metal plate 34 ' is integrated with the cover plate 34 and has recesses 36 in the form of a part of a circular ring for the passage of the liquid jets 21 emerging from the spray nozzles 20.
  • the number of spray nozzles 20 per rotor head 17 can be selected depending on the amount of liquid required.
  • the speed of the spray arms 19 is controlled as a function of the casting speed, that is to say as a function of the speed at which the casting strand 4 is drawn into the roll stand 10.
  • the liquid is preferably sprayed at a pressure between 200 and 500 bar.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)

Claims (16)

  1. Dispositif de laminage (9), comportant une cage de laminoir (10) et un dispositif de décalaminage (11) disposé en amont,
    caractérisé par le fait
    que le dispositif de décalaminage (11) présente un dispositif de décalaminage à rotor disposé immédiatement en avant du cylindre (14) de la cage de laminoir (10),
    les jets de liquide (31) qui sortent du dispositif de décalaminage à rotor et tombent sur le produit laminé (4) étant dirigés en sens opposé au sens du laminage (26).
  2. Dispositif de laminage selon la revendication 1, caractérisé par le fait que les plans passant par l'axe (22) des jets de liquide (21) et parallèles à un axe (18) de l'un des cylindres (14) de la cage de laminoir (10) forment toujours, avec la direction du laminage (26), au point d'incidence (25) du jet de liquide (21) sur la surface (24) du produit laminé (4), un angle aigu dont la pointe est dirigée en sens opposé au sens du laminage (26) .
  3. Dispositif de laminage selon la revendication 1 ou 2, caractérisé par le fait que l'axe (les axes) de rotor (23) du dispositif de décalaminage à rotor (11) est disposé (sont disposés) incliné(s) par rapport à la surface (24) du produit laminé (4) (figures 1, 2).
  4. Dispositif de laminage selon la revendication 3, caractérisé par le fait que l'ange d'inclinaison (6) de l'axe (23) du rotor par rapport à une droite dirigée perpendiculairement à la surface (24) du produit laminé (4) est supérieur à l'angle (α), que l'axe (22) d'un jet de liquide (21) fait avec l'axe (23) du rotor.
  5. Dispositif selon l'une des revendications 1 à 4, caractérisé par le fait qu'un écran protège la surface (24) du produit laminé (4) sur une aire partielle (32) de l'aire d'arrosage (33) produite par des jets de liquide (21) du dispositif de décalaminage à rotor (11) (figures 3, 4).
  6. Dispositif de laminage selon la revendication 5, caractérisé par le fait que pour la protection sur une aire partielle (32) est prévue une tôle de recouvrement (34) s'étendant perpendiculairement au-dessus de la surface (24) du produit laminé (4) et présentant une gouttière (35) d'évacuation du liquide.
  7. Dispositif de laminage selon l'une des revendications 5 ou 6, caractérisé par le fait que, vue en plan, la tôle de recouvrement (34) recouvre une aire d'arrosage (32) dirigée du côté de l'emprise de laminage (30) de la cage de laminoir (10).
  8. Dispositif de laminage selon la revendication 7, caractérisé par le fait que la tôle de recouvrement (34) comporte un dispositif (34') de capture du produit laminé ou de guidage de produit laminé, dirigé au sens opposé au sens du laminage, pour une introduction sûre du début du produit laminé dans l'emprise du laminoir (30).
  9. Dispositif de laminage selon la revendication 8, caractérisé par le fait que le dispositif de capture ou de guidage (34') est formé d'un panneau de tôle (34') qui s'étend parallèlement à l'un des axes (18) des cylindres (14) de la cage de laminoir (10) et dans lequel est prévu au moins un évidement (36) pour le passage des jets de liquide (21) sortant du dispositif de décalaminage à rotor (11).
  10. Dispositif de laminage selon la revendication 9, caractérisé par le fait que l'évidement (36) a la forme d'une partie d'un anneau circulaire.
  11. Dispositif de laminage selon l'une des revendications 1 à 10, caractérisé par le fait que la cage de laminoir (10) est conçue pour laminer un produit coulé en continu (4), en particulier un produit mince coulé en continu.
  12. Dispositif de laminage selon la revendication 11, caractérisé par le fait que la cage de laminoir (10) est intégrée dans une installation de coulée continue.
  13. Dispositif de laminage selon l'une des revendications 1 à 12, caractérisé par le fait que le dispositif de décalaminage à rotor (11) est disposé à l'intérieur du portique (16) de la cage de laminoir (10).
  14. Dispositif de laminage selon l'une des revendications 1 à 13, caractérisé par le fait que le dispositif de décalaminage à rotor (11) présente deux, ou plusieurs, têtes de rotor (17) disposées l'une à côté de l'autre à peu près parallèlement aux axes (18) des cylindres (14) de la cage de laminoir (10).
  15. Dispositif de laminage selon l'une des revendications 1 à 14, caractérisé par le fait que dans la zone d'entrée immédiate des cylindres (14) de la cage de laminoir (10) est prévu un dispositif (31) de projection transversal.
  16. Dispositif de laminage selon la revendication 15, caractérisé par le fait que, dans le cas de la présence d'une tôle de recouvrement (34) de l'aire d'arrosage, le dispositif (31) de projection transversal est prévu entre la tôle de recouvrement (34) et la surface (24) du produit laminé (4).
EP19940890135 1993-08-23 1994-08-16 Installation de laminage Revoked EP0640413B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT169793A AT399833B (de) 1993-08-23 1993-08-23 Walzeinrichtung
AT1697/93 1993-08-23

Publications (2)

Publication Number Publication Date
EP0640413A1 EP0640413A1 (fr) 1995-03-01
EP0640413B1 true EP0640413B1 (fr) 1997-10-22

Family

ID=3519041

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19940890135 Revoked EP0640413B1 (fr) 1993-08-23 1994-08-16 Installation de laminage

Country Status (7)

Country Link
EP (1) EP0640413B1 (fr)
JP (1) JPH07148515A (fr)
AT (1) AT399833B (fr)
CZ (1) CZ202494A3 (fr)
DE (1) DE59404406D1 (fr)
PL (1) PL174348B1 (fr)
SK (1) SK280072B6 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT406234B (de) * 1996-02-02 2000-03-27 Voest Alpine Ind Anlagen Verfahren zum entzundern eines werkstückes
DE102013224506A1 (de) * 2013-11-29 2015-06-03 Sms Siemag Ag Verfahren und Vorrichtung zum Entzundern einer metallischen Oberfläche sowie Anlage zum Herstellen von metallischen Halbzeugen
DE102016219830A1 (de) 2016-10-12 2018-04-12 Sms Group Gmbh Vorrichtung und Verfahren zum Entzundern einer Bramme

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE811831C (de) * 1948-10-02 1951-08-23 Sack Gmbh Maschf Spritzvorrichtung an Walzwerken
DE2165944B1 (de) * 1971-12-30 1972-08-31 Mannesmann AG, 4000 Düsseldorf Verfahren und Vorrichtung zum Entfernen von Zunderansätzen in Stranggießanlagen
DE3125146A1 (de) * 1981-06-26 1983-01-13 Woma-Apparatebau Wolfgang Maasberg & Co Gmbh, 4100 Duisburg Vorrichtung zum entzundern von heissen stahlbloecken
DE8603098U1 (de) * 1986-02-06 1986-03-27 Gebr. Bellmer GmbH + Co KG Maschinenfabrik, 7532 Niefern Reinigungsvorrichtung für ein Endlosband
JP2585529B2 (ja) * 1986-04-14 1997-02-26 株式会社日立製作所 高温の薄板鋳片を減厚圧延する方法及び装置
DE3624794A1 (de) * 1986-07-22 1988-02-04 Mannesmann Ag Einrichtung zum kontinuierlichen entzundern
US5001915A (en) * 1986-09-22 1991-03-26 David T. Blazevic Method for improving hot strip mill processing
US4989785A (en) * 1988-05-17 1991-02-05 Walendowski Stanley J Method of and apparatus for water jet cleaning
NL8900012A (nl) * 1989-01-04 1990-08-01 Hoogovens Groep Bv Werkwijze en sproeischijf voor het verwijderen van oxydehuid van een metalen werkstuk.
ES2108170T3 (es) * 1992-07-31 1997-12-16 Danieli Off Mecc Dispositivo de descascarillado que emplea agua.
DE4328303C2 (de) * 1992-12-23 1997-02-13 Juergen Gaydoul Einrichtung zum Entzundern von warmem Walzgut
DE4345351B4 (de) * 1993-01-28 2004-08-12 Sms Demag Ag Zunderwäscher

Also Published As

Publication number Publication date
EP0640413A1 (fr) 1995-03-01
ATA169793A (de) 1994-12-15
PL174348B1 (pl) 1998-07-31
PL304767A1 (en) 1995-03-06
CZ202494A3 (en) 1995-11-15
JPH07148515A (ja) 1995-06-13
SK99694A3 (en) 1995-06-07
SK280072B6 (sk) 1999-07-12
AT399833B (de) 1995-07-25
DE59404406D1 (de) 1997-11-27

Similar Documents

Publication Publication Date Title
EP2882542B2 (fr) Procede pour nettoyer et/ou decalaminer une brame ou un prefeuillard au moyen d'un laveur de calamine et laveur de calamine
DE4402402B4 (de) Verfahren zur Herstellung von warmgewalztem Stahlband aus stranggegossenem Vormaterial und Anlage zur Durchführung des Verfahrens
DE68919618T2 (de) Entzundern von Walzgut.
EP0608286B1 (fr) Procede de laminage a chaud et laminoir pour feuillard metallique
DE69524045T2 (de) Verfahren und vorrichtung zum reinigen von stahlblech
EP1937429A1 (fr) Procede et dispositif de coulee continue
EP1943033B1 (fr) Procede et systeme pour nettoyer des brames, des brames minces, des profiles ou similaires
EP2934778B1 (fr) Dispositif de refroidissement d'un produit laminé
DE19938705A1 (de) Entzunderungsvorrichtung für ein stranggegossenes Metallband
EP2344287B1 (fr) Procédé et dispositif pour le refroidissement d'une bande préliminaire ou d'une bande d'une ligne continue métallique dans un laminoir à chaud
EP1981660B1 (fr) Procédé destinés à la production de bandes métalliques laminées à chaud, notammment de bandes en acier à qualité de surface élevée
EP0640413B1 (fr) Installation de laminage
DE4345351B4 (de) Zunderwäscher
DE102009030793A1 (de) Vorrichtung und Verfahren zum horizontalen Gießen eines Metallbandes
EP0998993B1 (fr) Procédé et dispositif pour refroidir des produits de laminage chauds, notamment des bandes larges laminées à chaud
DE2208928A1 (de) Stranggiessanlage fuer brammen
EP1455975B1 (fr) Procede et dispositif pour produire une bande de metal ebarbee
WO2003013750A2 (fr) Installation de laminage a chaud
US5697241A (en) Rolling arrangement
DE7017922U (de) Aus- und einbaubarer stranggussanlagen bausatz fuer brammen
EP2379244B1 (fr) Procédé et dispositif de décalaminage d'une bande de métal
AT525563B1 (de) Trockengiessen in einer giess-walz-verbundanlage
EP4212259B1 (fr) Réduction des défauts de surface lors du laminage de finition du feuillard à chaud
DE10001074A1 (de) Warmwalzwerk mit Planheitsmeßrolle
EP2991779B1 (fr) Laminoir à chaud

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): DE FR GB IT SE

17P Request for examination filed

Effective date: 19950802

17Q First examination report despatched

Effective date: 19960711

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT SE

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

Effective date: 19971024

REF Corresponds to:

Ref document number: 59404406

Country of ref document: DE

Date of ref document: 19971127

ITF It: translation for a ep patent filed
ET Fr: translation filed
PLBQ Unpublished change to opponent data

Free format text: ORIGINAL CODE: EPIDOS OPPO

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

26 Opposition filed

Opponent name: SMS SCHLOEMANN-SIEMAG AG

Effective date: 19980721

PLBO Opposition rejected

Free format text: ORIGINAL CODE: EPIDOS REJO

APAC Appeal dossier modified

Free format text: ORIGINAL CODE: EPIDOS NOAPO

APAE Appeal reference modified

Free format text: ORIGINAL CODE: EPIDOS REFNO

APAC Appeal dossier modified

Free format text: ORIGINAL CODE: EPIDOS NOAPO

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

Ref country code: GB

Payment date: 20000717

Year of fee payment: 7

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

Ref country code: SE

Payment date: 20000726

Year of fee payment: 7

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

Ref country code: FR

Payment date: 20000801

Year of fee payment: 7

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

Ref country code: DE

Payment date: 20000802

Year of fee payment: 7

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

Ref country code: GB

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

Effective date: 20010816

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: 20010817

APAC Appeal dossier modified

Free format text: ORIGINAL CODE: EPIDOS NOAPO

RDAH Patent revoked

Free format text: ORIGINAL CODE: EPIDOS REVO

RDAG Patent revoked

Free format text: ORIGINAL CODE: 0009271

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

Free format text: STATUS: PATENT REVOKED

EUG Se: european patent has lapsed

Ref document number: 94890135.0

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20010816

27W Patent revoked

Effective date: 20020226

APAH Appeal reference modified

Free format text: ORIGINAL CODE: EPIDOSCREFNO