WO2008106744A1 - Procédé permettant de contrôler le profil d'épaisseur d'une bande - Google Patents

Procédé permettant de contrôler le profil d'épaisseur d'une bande Download PDF

Info

Publication number
WO2008106744A1
WO2008106744A1 PCT/AU2008/000318 AU2008000318W WO2008106744A1 WO 2008106744 A1 WO2008106744 A1 WO 2008106744A1 AU 2008000318 W AU2008000318 W AU 2008000318W WO 2008106744 A1 WO2008106744 A1 WO 2008106744A1
Authority
WO
WIPO (PCT)
Prior art keywords
strip
thickness
roll
nip
rolls
Prior art date
Application number
PCT/AU2008/000318
Other languages
English (en)
Inventor
Katsumi Nakayama
Shiro Osada
Hisahiko Fukase
Original Assignee
Bluescope Steel Limited
Ihi Corporation
Castrip, Llc
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 Bluescope Steel Limited, Ihi Corporation, Castrip, Llc filed Critical Bluescope Steel Limited
Publication of WO2008106744A1 publication Critical patent/WO2008106744A1/fr

Links

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
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0622—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two casting wheels
    • 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
    • B22D11/16—Controlling or regulating processes or operations

Definitions

  • This invention relates to the casting of metal strip. It has particular but not exclusive application to the casting of ferrous metal strip .
  • the molten metal may be poured from a ladle into a smaller vessel or series of smaller vessels from which it flows through a metal delivery nozzle located above the nip so as to direct it into the nip between the rolls, so forming a casting pool of molten metal supported on the casting surfaces of the rolls immediately above the nip.
  • This casting pool may be confined between end closure side plates or dams held in sliding engagement with the ends of the rolls .
  • twin roll casting it is difficult to maintain a constant strip thickness along the strip and a constant thickness profile across the strip.
  • Conventionally thickness control is addressed by mounting one of the casting rolls for movement laterally toward and away from the other roll , setting a gap between the roll and applying controlled forces to bearings at each end of the moveable roll, for example by means of biasing springs or hydraulic actuators .
  • variations can develop during a casting run due to changing solidification conditions at the casting pool, casting roll distortions and other factors which cannot be controlled solely by the application of forces on the rolls .
  • Japanese specification JP 60-27458A proposes a twin roll caster using chilled rolls that incorporate within them tapered pistons that are act ⁇ able to provide roll crown correction during casting, the thickness of the steel strip delivered from the nip of the caster being measured and the roll crown being corrected by movement of the tapered pistons in response to measured thickness values .
  • crown correction alone is not sufficient to maintain strip thickness within a target range both along the strip and across the strip since it does not address the problem of changes in thickness longitudinally of the strip which may develop progressively through a casting run.
  • a method of casting metal strip comprising introducing molten metal between a pair of chilled casting rolls forming a nip between them to form a casting pool of molten metal supported on the rolls and confined at the ends of the nip by pool confining end closures , rotating the rolls so as to cast a solidified strip delivered downwardly from the nip, and transporting the strip away from the nip, characterised by the steps of inspecting the strip as it is transported away from the nip to measure the thickness of a central part of the strip between its edges and to further measure strip thickness at a plurality of positions across the strip between its edges , varying the rotational speed of the casting rolls in response to variations in the measured thickness of the central part of the strip along the strip whereby to vary the time for solidification of metal on the rolls in the formation of said strip such as to control those thickness variations along the strip, and resiliently deforming at least one of the casting rolls in response to variations in the measured strip thickness at said plurality of positions
  • Variations in the thickness of the central part of the strip may be controlled by varying the speed of the casting rolls so as to maintain the thickness of the central part of the strip within a target thickness range.
  • the speed of the casting rolls may be decreased when the thickness of the central part of the strip is tending to fall below the target range of strip thickness and may be increased when the thickness of the central part of the strip is tending to exceed the target range.
  • Variation in the measured strip thickness at said plurality of positions may be controlled by the casting roll deformation so as to maintain the strip thickness at each of those positions within the target thickness range.
  • the resiliently deformable roll may be so deformed when the strip thickness at any one of said locations across the strip is tending to depart from the target range.
  • the variations in thickness of both the central part of the strip and at said plurality of locations across the strip may be determined as variations in the longitudinal direction of the strip over a strip length generated by a whole number of revolutions of the casting rolls .
  • strip length may be a length generated by a single revolution of the casting rolls .
  • a mark may be made on the strip upon each revolution of the casting rolls and successive marks on the strip may be detected so as to determine said strip length.
  • the invention further provides apparatus for casting metal strip comprising:
  • a pair of parallel casting rolls forming a nip between them; a metal delivery system for delivering molten metal into the nip to form a casting pool of molten metal supported above the nip; a pair of pool confining end closures disposed one at each end of the pair of casting rolls ; roll drive means to rotate the rolls in opposite directions to deliver a cast strip downwardly from the nip; and strip transport means to transport the strip away from the nip; characterised by strip inspection means to inspect the strip as it is transported away from the nip to measure the thickness of a central part of the strip between its edges and to further measure strop thickness at a plurality of pistons across the strip between its edges ; a roll speed controller operable to vary the speed of the casting rolls in response to variations in measured thickness of the central part of the strip along the strip whereby to vary the time for solidification of the strip such as to control those thick variations along the strips; and roll deforming means operable to deform at least one of the casting rolls in
  • Figure 1 illustrates diagraitimatically the general construction of a twin roll caster
  • Figure 2 illustrates a twin roll caster installation provided with means for performing the present invention
  • Figure 3 is a plan view of part of a twin roll caster suitable for use in the installation of Figure 2 ,
  • Figure 4 is a side elevation of caster components seen in Figure 3 .
  • Figure 5 a cross-section or the line 5-5 in Figure 4,
  • Figure 6 illustrates a caster with an alternative roll deforming construction for operation in accordance with the invention.
  • Figure 1 shows a twin roll caster comprising a pair of horizontally disposed chilled casting rolls 1 and a pair of side plates or dams 2 which engage the ends of rolls 1.
  • Casting rolls 1 are constructed such that cooling water can be circulated through the rolls and a nip 6 between the rolls can be adjusted depending on the thickness of a steel strip 3 to be produced.
  • Casting rolls 1 are contra-rotated at constant velocity such that the outer peripheries of the rolls move downwardly to the nip G at constant velocity.
  • a melt- supplying nozzle 4 is disposed immediately above the nip G and between the side plates 2 to receive molten steel from a ladle (not shown) .
  • Nozzle 4 supplies the molten steel to a casting pool supported on the casting rolls and confined at the ends of the nip G by the side plates 2.
  • Molten steel in the casting pool 5 solidifies onto the supporting surfaces of the casting rolls 1 to form solidified shells which come together at the nip G to form a solidified steel strip 3 which is delivered downwardly from the nip .
  • At least one of the casting rolls is mounted for transverse movement toward and away from the other casting roll such that its position can be adjusted.
  • One of the casting rolls may be fixed and the other moveable or they may both be mounted for transverse adjustment.
  • One of the casting rolls may be mounted in journal bearings to which biasing forces can be applied through biasing strings or other means to push the casting roll toward the other roll during casting as will be described in more detail later in this specification with reference to Figure 3.
  • the solidified shells on the outer peripheries of the casting rolls 1 can thicken due to gradual reduction in temperature of the molten steel supplied from the ladle to the nozzle 4, resulting in an increase in thickness of steel strip 3.
  • an exhausted ladle is replaced with a new ladle filled with molten steel solidification of the shells may be delayed with resulting in a decrease in thickness of the steel strip.
  • the solidification temperature of the molten steel can vary depending on the carbon silicon and manganese contents so it has been difficult to continuously cast steel with the thickness being kept within a target range.
  • FIG. 2 illustrates the manner in which the twin roll — 1 —
  • strip caster of Figure 1 can be adapted and installed for operation in accordance with the present invention.
  • the metal delivery nozzle 4 and side plates 2 have been omitted for clarity.
  • One of the casting rolls 1 is provided with marking means 8 for making a mark 7 on the steel strip 3 upon each rotation of the chilled rolls 1.
  • the marking means 8 is a convexity or concavity on the outer periphery of one of the chilled rolls 1 adjacent to the roll edge .
  • the convex or concave mark 7 is made on the steel strip 3 delivered from the nip G upon each rotation of the chilled rolls 1 when the marking means 8 is the concavity or convexity, respectively.
  • the steel strip 3 delivered from the nip G between the chilled rolls 1 is guided sideways by table rolls (not shown) via pinch rolls 11 into a horizontal rolling machine (not shown) .
  • a pressing force F is adapted to be afforded horizontally to a roll neck of the roll by means of roll profile correction means such as a cylinder as will be described in detail with reference to Figures 3 to 5.
  • noncontact type sensor 6 for measuring widthwise thickness distribution of the steel strip 3 , mark sensing means 9 closely adjacent to the sensor 6 and profile control means 10.
  • the noncontact type sensor 6, which is a combination of plurality of thickness sensors arranged widthwise of the steel strip 3, is positioned upstream of the punch rolls 11 in the direction of movement of the steel strip 3 and detects thicknesses at widthwise centre and plural portions between the widthwise centre and edge of the steel strip 3.
  • the mark sensing means 9 may be of a type sensing the mark 7 made on the steel strip 3 as variation of distance from reference position to a surface of the steel strip 3 or may be of a type sensing remarkably varied profile portion on the surface of the steel strip 3 through image processing.
  • the profile control means 10 has a first profile retaining function for prevention of excess/insufficiency in thickness of the steel strip 3 due to temperature in the molten metal pool 5 and a second profile retaining function for prevention of non-uniformity in thickness distribution of the steel strip 3 due to profile of the chilled roll 1.
  • the first profile retaining function is such that a present target range in thickness of the steel strip 3 is always compared with a widthwise central thickness value of the steel strip noncontact type sensor 6, a rotary motor (not shown) being activated to gradually increase or decrease the peripheral velocity of the chilled rolls 1 when the measured value is about to an upper or lower limit of the target range of strip thickness , respectively.
  • the peripheral velocity of the chilled rolls 1 which is the same as the moving velocity of the steel strip 3, may be determined on the ground of the number of times of the marks 7 passing per unit time obtained from mark passing information 13 from the mark sensing means 9 as well as the outer diameter of the chilled rolls 1.
  • the target thickness value is 2 mm and upper and lower limits of the target range of thickness are 2.1 and 1.9 mm, respectively, and when the measured widthwise central thickness value of the steel strip 3 exceeds the target thickness value and is approaching the upper limit of the target range of strip thickness, then the peripheral velocity of the chilled rolls 1 is gradually increased by the profile control means 10 to shorten time of the solidified shells in contact with the outer peripheries of the rolls, thereby suppressing increase in thickness of the overall steel strip 3 delivered from the nip G.
  • the peripheral velocity of the chilled rolls 1 is gradually decreased by the profile control means 10 to prolong the time of the solidified shells in contact with the outer peripheries of the rolls, thereby suppressing decrease in thickness of the overall steel strip 3 delivered from the nip G.
  • the phenomenon that thickness of the steel strip 3 increases due to gradual lowering in temperature of the molten steel can be averted; and the phenomenon that thickness of the steel strip 3 decreases due to rising in temperature of the molten metal pool 5 upon replacement of the ladles can be also averted.
  • the second profile retaining function is such that the present target range in thickness of the steel strip 3 is always compared with the measured thickness values on the plural widthwise portions of the steel strip obtained by the thickness information 12 from the noncontact type sensor 6.
  • the chilled roll or rolls 1 being resiliently deformed so as not to be away from the measured value on the portion from the target value of thickness, thereby making the nip G approaching to optimum.
  • at least one of the chilled rolls 1 is resiliently deformed periodically to suppress increase/decrease of the nip G.
  • the relative relationship between rotational positions of the chilled rolls 1 and periodic thickness variations of the steel strip 3 obtained from the noncontact type sensor 6 may be obtained from the length of movement of the steel strip 3 from the roll nip up to the noncontact type sensor 6, a distance between the noncontact type sensor 6 and the mark sensing means 9 and a moving velocity of the strip 3.
  • the widthwise thickness distribution of the steel strip 3 delivered from the nip 6 can be equalised.
  • FIGs 3 , 4 and 5 illustrate one particular design of components for a twin roll strip caster whereby bending forces can be applied to the casting rolls in performance of the method described above with reference to Figures 1 and 2.
  • casting rolls 1 are formed as sleeves 21 mounted on stub shafts 22 which are rotatable in inboard and outboard journal bearings 23, 24 mounted within inboard and outboard casting roll chocks 25, 26.
  • Roll chocks 25, 26 are carried by slides 27 moveable on guides 28.
  • the slide 27 carrying the chocks 25, 26 and bearings 23, 24 for one of the casting rolls is moveable by hydraulic servo cylinders 29 and this roll can be set in a fixed position by those cylinders .
  • the other casting roll is moveable laterally by movement of the respective slides 27 under the influence of the roll separation forces during casting and biasing springs 31 which apply biasing forces to the moving roll tending to maintain a constant gap between the rolls at the nip.
  • Outer end chocks 32 are provided for roll positioning at one end of the stub shafts 22 and rotary couplings 33 are provided at the other ends of the stub shafts for flow of cooling water to and from the interior of the casting rolls .
  • Roll chocks 27 are fitted with brackets 34 which carry cylinder units 35 operable to produce roll bending. More specifically each inboard roll chock 27 is fitted with two of the hydraulic cylinder units 35 the thrust rods 36 of which bear against the respective inboard roll chock 26. Actuation of cylinder units 35 applies equal and opposite forces to the inboard and outboard roll 11 chocks so as to impart bending moments to each of the stub shafts 22 producing bending of the roll .
  • the action of the roll bending cylinder units 35 is to bend the rolls such that the outer ends of the stub shafts
  • the casting rolls may be ground before hand to have an initial convex crown so that the roll bending cylinder units 35 can be actuated to deform the rolls through a range of shapes varying from the initial convex crown to a concave crown .
  • Equal forces may be applied to the roll bending actuators 35 at each end of a casting roll to produce symmetrical bending of the roll to a gentle parabolic curve. This is appropriate for correction of thickness variations across the strip which are symmetrical about the centre of the strip. If those variations are not symmetrical and are greater to one side of the central part of the strip to the other, at least one of the rolls can be bent asymmetrically by applying greater forces through the bending cylinder units 35 at one end of the roll than the forces applied by the actuators at the other end of the roll.
  • Figure 6 illustrates an alternative casting roll construction which enables the roll to be deformed for crown control .
  • the casting roll 1 comprises a copper sleeve 42 mounted on a central shaft 43 supported in journal bearings 44.
  • Sleeve 42 has internal spirally formed water flow passages 45 to which cooling water is supplied through a rotary coupling 46 at one end of the roll shaft and water supply passages 47 and is returned by return passages 48 through the coupling 46.
  • the central part of the roll shaft 43 within the sleeve 42 is provided with a pair of tapered annular pistons 51 disposed within tapered annular piston cavities 52 formed within the two ends of the central part of the shaft.
  • the tapered pistons 51 are actable by hydraulic fluid supplied through supply and return lines 53, 54 via the rotary coupling 46.
  • the movement of the pistons in the tapered piston chambers produces distortion and bending of the central part of the roll so as to vary the crown.
  • the supply of hydraulic fluid to the piston chambers 52 can be controlled by the profile control means 10 as previously described with reference to Figure 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)

Abstract

L'invention concerne un procédé de coulage d'une bande de métal comprenant une paire de cylindres de coulée en coquille formant un espace entre eux, et la rotation des cylindres de façon à couler une bande solidifiée livrée vers le bas depuis l'espace et à transporter la bande loin de l'espace, caractérisé par les étapes suivantes : - l'inspection de la bande lorsqu'elle est transportée loin de l'espace afin de mesurer l'épaisseur entre ses bords et de mesurer en outre l'épaisseur de la bande au niveau d'une pluralité de positions sur toute la bande entre ses bords, - la variation de la vitesse de rotation des cylindres de coulée en réponse à des variations dans l'épaisseur mesurée de la partie centrale de la bande tout au long de la bande de façon à varier le temps pour la solidification du métal sur les cylindres dans la formation de ladite bande afin de contrôler ces variations d'épaisseur le long de la bande, et de déformer de manière élastique au moins un des cylindres de coulée en réponse à des variations dans l'épaisseur de la bande mesurée au niveau de ladite pluralité de positions sur toute la bande afin de contrôler ces variations d'épaisseur sur toute la bande.
PCT/AU2008/000318 2007-03-07 2008-03-07 Procédé permettant de contrôler le profil d'épaisseur d'une bande WO2008106744A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007056902A JP2008213014A (ja) 2007-03-07 2007-03-07 ストリップ形状厚さ制御方法
JP2007-056902 2007-03-07

Publications (1)

Publication Number Publication Date
WO2008106744A1 true WO2008106744A1 (fr) 2008-09-12

Family

ID=39737708

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2008/000318 WO2008106744A1 (fr) 2007-03-07 2008-03-07 Procédé permettant de contrôler le profil d'épaisseur d'une bande

Country Status (2)

Country Link
JP (1) JP2008213014A (fr)
WO (1) WO2008106744A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009155645A1 (fr) * 2008-06-24 2009-12-30 Bluescope Steel Limited Procédé de coulée en bande mince pour commander la qualité de bord et appareil pour sa mise en œuvre
US7975755B2 (en) 2006-05-19 2011-07-12 Nucor Corporation Method and apparatus for continuously casting thin strip
US8397794B2 (en) 2011-04-27 2013-03-19 Castrip, Llc Twin roll caster and method of control thereof
CN110000350A (zh) * 2019-05-21 2019-07-12 一重集团大连工程技术有限公司 一种铸轧结晶辊
CN112839754A (zh) * 2018-10-22 2021-05-25 日本制铁株式会社 铸板的铸造方法
CN113953478A (zh) * 2021-10-25 2022-01-21 江苏沙钢集团有限公司 一种改善薄带钢边部轮廓的方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6620657B2 (ja) * 2016-04-21 2019-12-18 日本製鉄株式会社 鋳造ストリップ製造設備、及び、鋳造ストリップの製造方法
JP6658252B2 (ja) * 2016-04-21 2020-03-04 日本製鉄株式会社 鋳造ストリップ製造設備、及び、鋳造ストリップの製造方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1383160A (en) * 1973-04-10 1975-02-05 Alcan Res & Dev Method and apparatus for measurement of thickness of moving metal strip
US4979556A (en) * 1989-04-04 1990-12-25 Hunter Engineering Company, Inc. Thickness control for a continuous caster
EP1025934B1 (fr) * 1999-02-05 2003-12-17 Castrip, LLC Procédé de coulage à deux cylindres de tôle en ruban
AU2005297538A1 (en) * 2004-10-13 2006-04-27 Primetals Technologies Austria GmbH Method and device for continuously producing a thin metal strip

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6027458A (ja) * 1983-07-22 1985-02-12 Ishikawajima Harima Heavy Ind Co Ltd 連続鋳造機
JPS6068139A (ja) * 1983-09-21 1985-04-18 Kawasaki Steel Corp 急冷薄帯の製法
JPS62148061A (ja) * 1985-12-21 1987-07-02 Kawasaki Steel Corp 急冷薄帯の板厚制御方法
JPH07106429B2 (ja) * 1987-12-10 1995-11-15 石川島播磨重工業株式会社 双ロール式連鋳機の板厚制御方法
JPH02307653A (ja) * 1989-05-23 1990-12-20 Ishikawajima Harima Heavy Ind Co Ltd 双ロール式連続鋳造方法
FR2726210B1 (fr) * 1994-10-28 1997-01-10 Usinor Sacilor Mise en forme de produits metalliques minces entre deux cylindres
FR2732627B1 (fr) * 1995-04-07 1997-04-30 Usinor Sacilor Procede et dispositif de reglage du bombe des cylindres d'une installation de coulee de bandes metalliques
JP4572685B2 (ja) * 2005-01-14 2010-11-04 株式会社Ｉｈｉ 双ロール鋳造機

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1383160A (en) * 1973-04-10 1975-02-05 Alcan Res & Dev Method and apparatus for measurement of thickness of moving metal strip
US4979556A (en) * 1989-04-04 1990-12-25 Hunter Engineering Company, Inc. Thickness control for a continuous caster
EP1025934B1 (fr) * 1999-02-05 2003-12-17 Castrip, LLC Procédé de coulage à deux cylindres de tôle en ruban
AU2005297538A1 (en) * 2004-10-13 2006-04-27 Primetals Technologies Austria GmbH Method and device for continuously producing a thin metal strip

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7975755B2 (en) 2006-05-19 2011-07-12 Nucor Corporation Method and apparatus for continuously casting thin strip
WO2009155645A1 (fr) * 2008-06-24 2009-12-30 Bluescope Steel Limited Procédé de coulée en bande mince pour commander la qualité de bord et appareil pour sa mise en œuvre
US8141618B2 (en) 2008-06-24 2012-03-27 Nucor Corporation Strip casting method for controlling edge quality and apparatus therefor
AU2009262346B2 (en) * 2008-06-24 2015-10-15 Bluescope Steel Limited Strip casting method for controlling edge quality and apparatus therefor
US8397794B2 (en) 2011-04-27 2013-03-19 Castrip, Llc Twin roll caster and method of control thereof
CN112839754A (zh) * 2018-10-22 2021-05-25 日本制铁株式会社 铸板的铸造方法
CN110000350A (zh) * 2019-05-21 2019-07-12 一重集团大连工程技术有限公司 一种铸轧结晶辊
CN113953478A (zh) * 2021-10-25 2022-01-21 江苏沙钢集团有限公司 一种改善薄带钢边部轮廓的方法
CN113953478B (zh) * 2021-10-25 2022-11-25 江苏沙钢集团有限公司 一种改善薄带钢边部轮廓的方法

Also Published As

Publication number Publication date
JP2008213014A (ja) 2008-09-18

Similar Documents

Publication Publication Date Title
WO2008106744A1 (fr) Procédé permettant de contrôler le profil d'épaisseur d'une bande
EP3204177B1 (fr) Procédé de coulée d'une bande métallique à réglage de couronne
US9744589B2 (en) Method and apparatus for controlling variable shell thickness in cast strip
US20210001396A1 (en) Method for casting metal strip with crown control
EP3638437B1 (fr) Procédé de coulée d'une bande métallique à réglage de bord
US8607848B2 (en) Method for casting metal strip with dynamic crown control
US8322402B2 (en) Method and apparatus for controlling strip temperature rebound in cast strip
US8607847B2 (en) Method for casting metal strip with dynamic crown control
CN112839754B (zh) 铸板的铸造方法
US8028741B2 (en) Strip casting apparatus with improved side dam force control

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08714366

Country of ref document: EP

Kind code of ref document: A1

DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)
NENP Non-entry into the national phase

Ref country code: DE

NENP Non-entry into the national phase

Ref country code: JP

122 Ep: pct application non-entry in european phase

Ref document number: 08714366

Country of ref document: EP

Kind code of ref document: A1