EP0780171B1 - Verfahren zum Ziehen von Rohren mit Überwachung der Schwingungen des Ziehsystems - Google Patents
Verfahren zum Ziehen von Rohren mit Überwachung der Schwingungen des Ziehsystems Download PDFInfo
- Publication number
- EP0780171B1 EP0780171B1 EP96114265A EP96114265A EP0780171B1 EP 0780171 B1 EP0780171 B1 EP 0780171B1 EP 96114265 A EP96114265 A EP 96114265A EP 96114265 A EP96114265 A EP 96114265A EP 0780171 B1 EP0780171 B1 EP 0780171B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- plug
- die
- machine
- tube
- vibrations
- 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 - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
- B21C1/22—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles
Definitions
- the invention relates to a method for pulling pipes under Use of at least one die and one stopper (see e.g. JP-A-2 099 216).
- preformed tubes are passed through one from a matrix and the other from a plug formed annular gap.
- darning can be a flying plug or one plugs connected with a plug rod (rod plugs) act.
- the operator's rattling is also heard of his personal skills, in particular his responsiveness, his attitude to the workplace and the respective environmental conditions. This means that there is a delayed response the operator not only to create chatter marks, but that there is even a demolition, i.e. one Destruction of pipes can occur.
- the setting of the Pull speed is therefore based on the base "Hear the chatter” and change the pulling speed.
- Newer model building approaches are based on the Finite element method and analyze stress states as well as the pressures occurring in the flow zone (including dissertation by Xia-Ping-Liu May 1961 at the Technical University of Clausthal with the work "Investigation of the Shape change and stress condition when pulling pipes with the finite element method ").
- the invention is based on the prior art Task to create a method for pipe drawing, where it is possible with economic effort, that could damage the pipes or even destroy them of the pipes leading vibration behavior of the drawing system Detect the pipe-plug-die machine early to be able to take countermeasures in good time.
- the invention takes advantage of the knowledge which so far when examining the problem "Plug chatter" were won. In principle it is about swinging on the inside of a drawn tube Stopper around a friction transducer where the Coulombsche Frictional force depending on the sliding speed has typical discontinuities.
- the stopper initially adheres to the inner wall of the pipe and is carried along the further movement of the pipe until the retention force of the plug outweighs the static friction.
- This restraining force is that for the bar stuffing Spring force of the plug rod firmly connected to this, while moving out of geometry while plugging of the plug.
- the Retention force becomes smaller than the adhesive force and the stopper is carried again in the direction of pull. It is a non-linear vibration process.
- Process-related influences are the distribution and the Size of the normal stress on the one against the stopper Pipe length section and the relative speeds occurring there and temperatures.
- Material-related Influences are e.g. the surface texture, the Hardness, the tendency of the friction partners to adhere and the chemical composition and structure of materials.
- Influences caused by lubricants are pressure and temperature resistance, the viscosity and the shear strength of a lubricant as well as the chemical and physical Responsiveness within the tribological Systems.
- the coefficient of friction is a function that of the relative speed between the stopper and the pipe, the respective location in the pipe and the interfaces between the pipe and the plug Temperature depends.
- the normal pressure is dependent on the resistance to deformation, whose main influencing factors are structure and type of material, the degree of forming, the forming temperature, the rate of deformation and the state of stress of the tube as forming parameters.
- the invention proposes before, the vibrations caused by the drawing process Pulling system pipe-plug-die-machine sensorially too capture and then the pulling speed and / or the Lubrication of the pipes or the plug in the pipe depending from an experience-based setpoint of Vibration amplitude of at least part of the drawing system Automatically regulate pipe plug die machine.
- the setpoint is based on the pipe drawing machine - or plug characteristics of the entire drawing system and can therefore be regulated in the form of an Threshold are calibrated.
- Lubrication here is especially the lubrication of the To understand the inner pipe wall in the area of the plug. This can be via a hollow plug rod or one in the pipe threaded probe done.
- the drawing speed can be increased automatically.
- the lubrication can also be changed become.
- the Pulling speed reduced. Whether it is also necessary here is to change the lubrication depends on the particular case of knowledge from.
- the essential essence of the invention is therefore based on that the optimal output on drawn tubes maximum capacity utilization of the drawing machine more of the personal skills of the operator and the prevailing environmental conditions is dependent.
- the vibrations of the drawing system Pipe-plug-die machine by means of a Structure-borne noise sensors are detected. It can be e.g. turn out to be useful, the sensor technology at the end of a Plug rod or on the holder of the plug rod to provide.
- the measurement of structure-borne noise on the bracket a stopper rod provides a signal that is related to the Control of the drawing speed is particularly suitable. This can also cause noise, for example the drive, in particular chain drive, of a drawing machine and the pipe catch arms effective through purely mechanical Measures such as through rubber dampers and adjustments be suppressed.
- the invention has recognized that the structure-borne noise sensors Accelerations at the location of the sensor, so e.g. at the end of a stopper rod, have it measured correctly.
- a conclusion can be drawn about the amplitude of the Plug vibration itself is only possible to a limited extent. Consequently proposes a development of the invention according to the features of Claim 3 before that the vibrations of the drawing system Pipe-plug-die machine by an inductive sensor system be recorded.
- an inductive Sensors both behind and in front of a die to be ordered. This is done with an arrangement of the sensors a measuring coil is also provided there behind the die and the stopper becomes a highly permeable extension assigned.
- the inductive sensors before the measuring coil is also provided there and a highly permeable mark on the circumference of the stopper rod arranged.
- the sensor position behind the die has the advantage that the measuring effect is greater because the finished drawn Part of the tube has a smaller wall thickness than the blank.
- the pipes would be demagnetized in this Case impractical. You would just have an extra spool require and their alternating field would go directly into the measuring coil coupled. Therefore the sensor position is in front of the Matrix advantageous because it may demagnetize enabled behind the die. The reason for this is the The fact that a decoupling of the measuring coil and demagnetizing coil through the large steel block of the die given is.
- vibrations of the drawing system tube-stopper-die machine by at least one strain gauge capture.
- Such sensors can both on End of the plug rod and provided on its holder become.
- a magnetostrictive sensor system can be detected.
- a piezoelectric sensor system can both tensile forces as well as dynamic changes in tractive force (vibrations) and be taken into account in the setpoint calculation.
- Magnetostrictive sensors are very robust and for practical use when measuring tensile forces as well as changes in tractive force.
- the transmission behavior of a plug rod leaves only requires a conclusion on the vibration amplitude of the Plug during measurements at the rod end.
- a combined Force and vibration path or vibration velocity or vibration acceleration measurement can affect the transmission behavior according to claim 7 with the help of digital Filters are compensated.
- the detection of the plug vibration and / or the forces acting on the stopper takes place independently of the plug rod holder, be it firm, sprung, damped or free and / or disturbing vibrations additionally coupled in there the machine periphery.
- Form the digital filter the transmission behavior of the plug rod according to that experimentally using identification methods or can be determined using a mathematical model.
- the advantage of this embodiment is that despite measurements at the end of the plug rod, the vibration amplitude of the plug precisely calculated and a comparison carried out more precisely with the setpoint of a controller can be.
- Interference signals from at least one of the various Measured signals obtained from measurements can - if necessary -
- adaptive filtering can be eliminated.
- the vibration amplitude is determined by described linguistic variable (fuzzification) and with the help of a rule base a verbal description of the Pulling speed created. By defuzzification you get a concrete numerical value, which then supplied to the internal speed control as setpoint becomes.
- the expert system has the task of determining a target size of the Specify the vibration amplitude of the stopper and if necessary. to adapt the rule base of the fuzzy controller.
- the expert system relies on knowledge or experience previous measurements as well as on the input current system sizes such as the inner and outer diameter of a pipe, the pipe material, the diameter reduction, the question of whether it is a flying or is a plug, the type of plug and ultimately the machine type.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Extraction Processes (AREA)
- Processing Of Meat And Fish (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Heat Treatment Of Articles (AREA)
Description
Claims (10)
- Verfahren zum Ziehen von Rohren unter Verwendung mindestens einer Matrize sowie eines Stopfens, dadurch gekennzeichnet, daß die durch den Ziehvorgang bedingten Schwingungen des Ziehsystems Rohr-Stopfen-Matrize-Maschine sensorisch erfaßt und die Ziehgeschwindigkeit und/oder die Schmierung der Rohre in Abhängigkeit von einem rohr- und/oder ziehmaschinen- und/oder stopfencharakteristisch kalibrierbaren Sollwert der Schwingungsamplitude zumindest eines Teils des Ziehsystems Rohr-Stopfen-Matrize-Maschine geregelt werden.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Schwingungen des Ziehsystems Rohr-Stopfen-Matrize-Maschine mittels einer Körperschallsensorik erfaßt werden.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Schwingungen des Ziehsystems Rohr-Stopfen-Matrize-Maschine durch eine induktive Sensorik erfaßt werden.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Schwingungen des Ziehsystems Rohr-Stopfen-Matrize-Maschine durch wenigstens einen Dehnungsmeßstreifen erfaßt werden.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Schwingungen des Ziehsystems Rohr-Stopfen-Matrize-Maschine durch eine piezoelektrische Sensorik erfaßt werden.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Schwingungen des Zieh-Systems Rohr-Stopfen-Matrize-Maschine durch eine magnetostriktive Sensorik erfaßt werden.
- Verfahren nach mindestens einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Schwingungen des Ziehsystems Rohr-Stopfen-Matrize-Maschine und/oder die hier wirksamen Kräfte durch eine kombinierte Kraft- und Schwingweg- oder Schwinggeschwindigkeits- oder Schwingbeschleunigungsmessung am Ende einer Stopfenstange unabhängig von der Aufhängung der Stopfenstangenhalterung und dort eingekoppelter störender Schwingungen unter Verwendung digitaler Filter erfaßt werden.
- Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß zusätzlich eine zweite Messung der Schwingungen des Ziehsystems Rohr-Stopfen-Matrize-Maschine mit geeigneter Sensorik an der Maschine, an der Matrize, an dem Ziehschlitten oder dem Antrieb durchgeführt wird und Störsignale aus wenigstens einem der bei der ersten Messung gewonnenen Meßsignale durch eine Adaptivfilterung eliminiert werden.
- Verfahren nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß dem Sollwert der Schwingungsamplitude zumindest eines Teils des Ziehsystems Rohr-Stopfen-Matrize-Maschine die Reglerparameter eines Fuzzy-Reglers adaptiert werden.
- Verfahren nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die den Ziehvorgang beeinflussenden Systemparameter, wie insbesondere die Abmessung der Rohre, das Rohrmaterial, die Durchmesserreduzierung, die Schmiermittelart, die Maschinennutzungsdauer, der Verschleißzustand von Stopfen und Matrize, der Stopfentyp und/oder die Ziehmethode durch ein Expertensystem sowie ein mathematisches Modell verknüpft werden und daraus der Reglersoliwert abgeleitet wird.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL96317508A PL180777B1 (pl) | 1995-12-20 | 1996-12-16 | Sposób ciągnienia rur |
SK1631-96A SK282481B6 (sk) | 1995-12-20 | 1996-12-18 | Spôsob ťahania rúrok |
CZ19963746A CZ290523B6 (cs) | 1995-12-20 | 1996-12-18 | Způsob taľení trubek |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19547518A DE19547518C1 (de) | 1995-12-20 | 1995-12-20 | Verfahren zum Ziehen von Rohren |
DE19547518 | 1995-12-20 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0780171A1 EP0780171A1 (de) | 1997-06-25 |
EP0780171B1 true EP0780171B1 (de) | 1999-01-20 |
Family
ID=7780614
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96114265A Expired - Lifetime EP0780171B1 (de) | 1995-12-20 | 1996-09-06 | Verfahren zum Ziehen von Rohren mit Überwachung der Schwingungen des Ziehsystems |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0780171B1 (de) |
AT (1) | ATE175908T1 (de) |
DE (2) | DE19547518C1 (de) |
ES (1) | ES2126972T3 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021190710A1 (de) * | 2020-03-26 | 2021-09-30 | Sms Group Gmbh | Ziehmaschine, ziehverfahren sowie ziehdorn |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006007853A1 (de) * | 2006-02-17 | 2007-08-30 | Bl Chemie Gmbh & Co. Kg | Ziehverfahren zum Umformen von Werkstücken aus metallischen Werkstoffen sowie Vorrichtung zur Durchführung des Verfahrens |
DE102022001052A1 (de) | 2022-03-25 | 2023-09-28 | QASS GmbH Qualität Automation Systeme Software | Verfahren und Vorrichtung zum Herstellen von Rohren, Drähten, Profilen und dergleichen Langmaterial |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0263606A (ja) * | 1988-08-29 | 1990-03-02 | Akira Ozawa | 引抜装置におけるプラグ挿入装置 |
JPH0299216A (ja) * | 1988-10-05 | 1990-04-11 | Sumitomo Metal Ind Ltd | 金属の管または線の引き抜き加工法 |
JPH0780009B2 (ja) * | 1989-10-03 | 1995-08-30 | 住友金属工業株式会社 | マンドレルの自励振動防止方法および装置 |
-
1995
- 1995-12-20 DE DE19547518A patent/DE19547518C1/de not_active Expired - Fee Related
-
1996
- 1996-09-06 DE DE59601181T patent/DE59601181D1/de not_active Expired - Fee Related
- 1996-09-06 EP EP96114265A patent/EP0780171B1/de not_active Expired - Lifetime
- 1996-09-06 AT AT96114265T patent/ATE175908T1/de not_active IP Right Cessation
- 1996-09-06 ES ES96114265T patent/ES2126972T3/es not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021190710A1 (de) * | 2020-03-26 | 2021-09-30 | Sms Group Gmbh | Ziehmaschine, ziehverfahren sowie ziehdorn |
Also Published As
Publication number | Publication date |
---|---|
ES2126972T3 (es) | 1999-04-01 |
ATE175908T1 (de) | 1999-02-15 |
DE19547518C1 (de) | 1997-04-24 |
DE59601181D1 (de) | 1999-03-04 |
EP0780171A1 (de) | 1997-06-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE602005003633T2 (de) | Verfahren zur Erkennung von Vibrationen eines Walzgerüstes | |
EP1162029B1 (de) | Verfahren und Vorrichtung zum Überwachen des Verschleisszustandes eines Werkzeuges | |
EP2730906B1 (de) | Vorrichtung und Verfahren zur Zustandsüberwachung eines Wälzlagers | |
DE202008014792U1 (de) | Vorrichtung zum Bewerten von Zerspanungsprozessen | |
WO2016176704A1 (de) | Verfahren zum verbinden eines rohres, für flüssige oder gasförmige medien, mit einem steckverbinder | |
AT518154B1 (de) | Verfahren und Vorrichtung zum Trennen eines Werkstückes | |
EP0824386B1 (de) | Verfahren zum betreiben einer oszillierend angetriebenen kokille und stranggiesseinrichtung zur durchführung des verfahrens | |
DE102019207746A1 (de) | Verfahren zum Ermitteln einer Zustandsinformation betreffend eine Bandschleifmaschine mittels eines maschinellen Lernsystems | |
EP0780171B1 (de) | Verfahren zum Ziehen von Rohren mit Überwachung der Schwingungen des Ziehsystems | |
AT517886B1 (de) | Vorrichtung zum Überprüfen eines Zustandes eines Maschinenteils | |
EP3365737B1 (de) | Bestimmung der steifigkeit eines antriebsstranges einer maschine, insbesondere einer werkzeug- oder produktionsmaschine | |
AT515672B1 (de) | Biegepresse | |
DE3415305A1 (de) | Verfahren und anordnung zum ueberwachen der bearbeitungsbedingungen an einer werkzeugmaschine | |
EP0806256B1 (de) | Verfahren zur Materialflusssteuerung beim Ziehen von Blechformteilen sowie Vorrichtung zur Durchführung des Verfahrens | |
WO1997031749A2 (de) | Verfahren und vorrichtung zur kompensation dynamischer verlagerungen an spanabhebenden werkzeugmaschinen | |
WO1991007245A1 (de) | Verfahren und vorrichtung zur überwachung der spannkraft bei werkzeugmaschinen | |
DE102004038416A1 (de) | Verfahren zum Bestimmen von Raumkoordinaten eines Messpunktes an einem Messobjekt sowie entsprechendes Koordinatenmessgerät | |
DE19620439A1 (de) | Bedämpfung von mechanischen Schwingungen | |
DE102022001052A1 (de) | Verfahren und Vorrichtung zum Herstellen von Rohren, Drähten, Profilen und dergleichen Langmaterial | |
EP3825645B1 (de) | Vorrichtung zum erfassen einer verbindungsstelle an einem aus einer vielzahl von miteinander verbundenen strangabschnitten bestehenden flexiblen materialstrang | |
EP4013556B1 (de) | Verfahren zur online-ermittlung wenigstens eines walzparameters sowie walzwerk mit einer einrichtung zur online-ermittlung wenigstens eines walzparameters | |
DE102004019449A1 (de) | Vernietungsprozeß | |
DE102018100911A1 (de) | Verfahren zur Früherkennung von Schäden an einer Werkzeugmaschine; Vorrichtung zum Durchführen des Verfahrens; sowie Werkzeugmaschine | |
WO2007147765A1 (de) | Verfahren und vorrichtung zur prozesskontrolle beim walzen von metallen | |
DE102019207744A1 (de) | Verfahren zum Ermitteln einer Zustandsinformation betreffend eine Bandschleifmaschine mittels eines maschinellen Lernsystems |
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 |
|
17P | Request for examination filed |
Effective date: 19970128 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT DE ES FR GB IT NL |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
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 |
|
17Q | First examination report despatched |
Effective date: 19980707 |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
RBV | Designated contracting states (corrected) |
Designated state(s): AT ES FR GB IT NL |
|
RBV | Designated contracting states (corrected) |
Designated state(s): AT DE ES FR GB IT NL |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: 8566 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT DE ES FR GB IT NL |
|
REF | Corresponds to: |
Ref document number: 175908 Country of ref document: AT Date of ref document: 19990215 Kind code of ref document: T |
|
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 19990120 |
|
ITF | It: translation for a ep patent filed |
Owner name: BARZANO' E ZANARDO ROMA S.P.A. |
|
REF | Corresponds to: |
Ref document number: 59601181 Country of ref document: DE Date of ref document: 19990304 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2126972 Country of ref document: ES Kind code of ref document: T3 |
|
ET | Fr: translation filed | ||
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 | ||
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: FR Payment date: 20020719 Year of fee payment: 7 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: AT Payment date: 20020724 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: 20020816 Year of fee payment: 7 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 20020904 Year of fee payment: 7 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20020925 Year of fee payment: 7 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 20020930 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: 20030906 Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20030906 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20030908 |
|
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: 20040401 Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20040401 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20030906 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20040528 |
|
NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee |
Effective date: 20040401 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20030908 |
|
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: 20050906 |