EP0562296A1 - Procédé pour le bobinage de matériau fileforme, alimenté en continu de préférence à vitesse constante, en enroulement de précision étagée et dispositif de bobinage pour la mise en oeuvre de ce procédé - Google Patents

Procédé pour le bobinage de matériau fileforme, alimenté en continu de préférence à vitesse constante, en enroulement de précision étagée et dispositif de bobinage pour la mise en oeuvre de ce procédé Download PDF

Info

Publication number
EP0562296A1
EP0562296A1 EP93102947A EP93102947A EP0562296A1 EP 0562296 A1 EP0562296 A1 EP 0562296A1 EP 93102947 A EP93102947 A EP 93102947A EP 93102947 A EP93102947 A EP 93102947A EP 0562296 A1 EP0562296 A1 EP 0562296A1
Authority
EP
European Patent Office
Prior art keywords
winding
speed
drive
bobbin
thread guide
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
EP93102947A
Other languages
German (de)
English (en)
Other versions
EP0562296B1 (fr
Inventor
Heinz Hefert
Peter Siebertz
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.)
Georg Sahm GmbH and Co KG
Original Assignee
Georg Sahm GmbH and Co KG
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 Georg Sahm GmbH and Co KG filed Critical Georg Sahm GmbH and Co KG
Publication of EP0562296A1 publication Critical patent/EP0562296A1/fr
Application granted granted Critical
Publication of EP0562296B1 publication Critical patent/EP0562296B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H54/00Winding, coiling, or depositing filamentary material
    • B65H54/02Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
    • B65H54/38Arrangements for preventing ribbon winding ; Arrangements for preventing irregular edge forming, e.g. edge raising or yarn falling from the edge
    • B65H54/381Preventing ribbon winding in a precision winding apparatus, i.e. with a constant ratio between the rotational speed of the bobbin spindle and the rotational speed of the traversing device driving shaft
    • B65H54/383Preventing ribbon winding in a precision winding apparatus, i.e. with a constant ratio between the rotational speed of the bobbin spindle and the rotational speed of the traversing device driving shaft in a stepped precision winding apparatus, i.e. with a constant wind ratio in each step
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H54/00Winding, coiling, or depositing filamentary material
    • B65H54/02Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
    • B65H54/06Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers for making cross-wound packages
    • B65H54/08Precision winding arrangements
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H54/00Winding, coiling, or depositing filamentary material
    • B65H54/02Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
    • B65H54/40Arrangements for rotating packages
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00Handled material; Storage means
    • B65H2701/30Handled filamentary material
    • B65H2701/31Textiles threads or artificial strands of filaments

Definitions

  • the invention relates to a method for winding continuously, preferably at a constant speed, a thread-like winding material fed to a winding device in a stepped precision cross winding, in which the speed of the bobbin detects with a first sensor and the speed of the drive of the traversing thread guide with a second sensor, the speeds with each other compared and depending on which the drive of the traversing thread guide is regulated.
  • Thread-like winding material is understood in particular to mean yarns or tapes.
  • the winding direction for carrying out the method is provided with a drive for the bobbin and a first assigned sensor, with a drive for the traversing thread guide and a second assigned sensor and with a first controller for processing the signals of the two sensors for regulating the drive of the traversing thread guide.
  • the speed of the bobbin and the number of double strokes of the traversing thread guide form a fixed ratio, the so-called bobbin ratio.
  • the crossing angles necessarily change.
  • changing the crossing angle is only possible within certain limits in order not to endanger the stability of the coil. Therefore the achievable diameter ratio between a full and an empty spool is limited.
  • Precision cross-wound coils can but can be optimally adapted to the special requirements of the ware or its use.
  • the change in the winding ratio from one stage of the precision cross winding to the next is so small that the change in the winding speed of the yarn caused thereby or ribbon 3%, preferably 0.3%, the mean wind speed does not exceed. This limits the change in wind speed. Due to the constant peripheral speed of the bobbin during the winding cycle, the change in the winding speed cannot be eliminated. This requires a very narrow gradation, so that the number of winding phases with a constant winding ratio increases. By an abrupt change in the coil ratio during the coil build-up in several phases, however, the crossing angle can be kept within limits that are favorable for the coil build-up.
  • EP-OS 195 325 also assumes a constant spool circumferential speed when winding threads into packages and reduces the speed of the traversing thread guide between a predetermined upper limit and a fixed lower limit proportional to the decreasing spindle speed. When the lower limit is reached, the speed of the traversing thread guide is increased again up to the upper limit. This creates a precision cross winding with winding ratios reduced in stages. To improve the bobbin build-up, the upper and lower limits of the traversing speed are reduced or increased in the same direction during the winding cycle.
  • EP-OS 194 524 also shows a method for winding threads in a graduated precision cross winding.
  • the bobbin ratios not only have to be precalculated with great accuracy, but also have to be observed exactly. Since the electrical and electronic measurement and control technology, which are limited for the measurement of the speeds and compliance with the proportionality between the spindle drive and the drive of the traversing thread guide, the modulation of the winding ratio is proposed in each winding phase to improve the winding structure.
  • the modulation width should be less than 0.1%.
  • DE-AS 26 49 780 describes a winding machine for textile yarns in which the bobbin is driven on its periphery by means of a speed-controlled drive roller and the reverse thread shaft in which the traversing thread guide is moved is also speed-controlled. Both speeds are controlled by electronic control circuits and computers, which take into account, among other things, the mathematical relationships between winding speed, peripheral speed of the bobbin or drive roller and thread laying speed, so that the difference between thread speed and winding speed can be specified. With this device, the production of precision cross-wound bobbins with constant feed speed and constant thread tension during winding is possible.
  • preprogrammed jumps in the winding ratio can be carried out on the computer in order to avoid unfavorable areas of the crossing angles when the bobbin is full and empty.
  • the technical effort for these computer-controlled speeds of the drive roller and the reverse thread shaft is correspondingly high. Changes in the wind-up speed are not completely eliminated because a positive drive always slips.
  • the invention is based on the object, starting from a method and a winding device of the type described above, that is to say in a graduated precision cross winding, to avoid the disadvantages which are associated with a constant coil peripheral speed.
  • the drive of the bobbin is regulated in such a way that the winding speed of the winding material on the bobbin corresponds to the speed of the continuously supplied winding material during the entire winding cycle.
  • the winding speed therefore remains the same not only in the individual winding phases with a constant winding ratio, but also during the jumps between the individual winding phases, that is to say in the time in which one winding ratio is left and the other winding ratio is sought.
  • the new method is thus ideally suited for winding up items to be delivered continuously at a preferably constant speed, as is the case in particular with spun threads. This does not adversely affect the material to be wound. It always remains under a defined thread tension, so that all advantages of a stepped precision cross winding are achieved.
  • the drive of the bobbin can be regulated by a thread tension transducer, in particular a dancer, in such a way that in every winding phase with constant winding ratio the decreasing winding speed caused by decreasing crossing angle is compensated for by a continuous increase in the speed of the bobbin, and that with every jump between two winding phases with constant winding conditions, the increasing wind-up speed caused by the increase in the crossing angle is compensated for by a reduction in the speed of the coil. So are the conditions by changing the crossing angle addressed. In addition, of course, the conditions that result from the increase in the diameter of the coil must also be taken into account. This influence is greater than the influence of changing the crossing angle.
  • Each updraft phase can be started with a matching starting crossing angle and ending with a matching ending crossing angle.
  • the crossing angle passes through a fixed, constant area in the area of each winding phase, which is decisive for the quality of the coil construction and the further processing properties of the coil.
  • a winding device suitable for carrying out the method is equipped with a drive for the bobbin and a first assigned sensor, with a drive for the traversing thread guide and a second assigned sensor and with a first controller for processing the signals of the two sensors for regulating the drive of the traversing thread guide .
  • a second controller for regulating the drive of the spool is designed in the sense of the winding speed of the continuously supplied winding material and is connected to the drive of the spool.
  • the second regulator is preceded by a thread tension transducer, preferably a dancer, which adjusts the rotational speed of the drive of the bobbin in the sense of the winding speed of the continuously supplied winding material via this second regulator.
  • the drive of the winding spindle is adjusted so that the z. B. the tension of the thread measured by the dancer arm remains defined.
  • the drive for the coil can preferably consist of an axle drive. But it is also possible for Drive the coil to provide a drive roller, as is known per se.
  • the sensors are usually designed as tachometers
  • the sensors are now designed as pulse generators, with the computer each having a counter for each pulse generator.
  • the speeds of the drives can be recorded exactly, that is, much more precisely than with a tachometer.
  • a motor that can be regulated in its speed can be provided, which is preceded by a control device. It is also possible to provide a motor with adjustable speed for driving the traversing thread guide, which is preceded by a control device. In this way it is possible to determine the speed of the traversing thread guide as a function of the speed of the drive of the bobbin in accordance with the desired winding ratio, and on the other hand to regulate the drive of the bobbin in the sense of the winding speed of the continuously fed winding material, even with changing crossing angles, to reach.
  • a three-phase motor 1 is illustrated in FIG. 1, via which the spindle 2, which is only symbolically indicated, is driven. It can be a direct axle drive or a drive roller drive.
  • a pulse generator 3 is assigned to the three-phase motor 1, with the aid of which the speed of the spindle 2 or the three-phase motor 1 can be determined exactly.
  • a three-phase motor 4 is provided, via which the traversing thread guide 5, which is only indicated, is driven.
  • a second pulse generator 5 is assigned to the traversing thread guide 5 or the three-phase motor 4, so that its speed or rotational speed can also be monitored very precisely.
  • Electrical lines 7 and 8 lead to a computer 9, each having a counter 10 and 11, a comparator 12 and a first controller 13.
  • a second controller 20 is provided, which can be designed as a PID controller. With the counter 11, the pulses of the pulse generator 3 are counted. The counter 10 counts the pulses from the pulse generator 6. The number of pulses is further processed in the comparator 12 and fed to the first controller 13.
  • a dancer 14 with a roller 15, over which the thread of the ware is passed, is connected upstream of the second controller 20.
  • a movement of the dancer 14 leads to a signal change which is fed to the second controller 20.
  • a first electrical line 16 leads from the second regulator 20 to the three-phase motor 1 via a regulator 17 designed as a frequency converter.
  • the second regulator 20 primarily regulates the three-phase motor 1 and thus the drive of the spindle 2 in the sense of the winding speed of the continuously at preferably constant speed supplied laundry.
  • an electrical line 18 leads from the first controller 13 via a control device 19 designed as a frequency converter to the three-phase motor 4 of the drive of the traversing thread guide 5.
  • FIG. 2 shows a diagram to illustrate the constant length of winding material per unit of time (winding speed) wound up during the winding cycle.
  • winding speed the amount of the length of the reels per unit time L is always constant.
  • the circumferential speeds v U as well as the traversing speeds v C change with a constant winding ratio in each winding phase and nevertheless the length of the material to be wound per unit time L remains constant.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Winding Filamentary Materials (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
EP93102947A 1992-03-16 1993-02-25 Procédé pour le bobinage de matériau fileforme, alimenté en continu de préférence à vitesse constante, en enroulement de précision étagée et dispositif de bobinage pour la mise en oeuvre de ce procédé Expired - Lifetime EP0562296B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4208393A DE4208393A1 (de) 1992-03-16 1992-03-16 Verfahren zum aufspulen kontinuierlich mit vorzugsweise konstanter geschwindigkeit einer spuleinrichtung zugefuehrtem, fadenfoermigem spulgut in gestufter praezisionskreuzwicklung sowie spuleinrichtung zur durchfuehrung des verfahrens
DE4208393 1992-03-16

Publications (2)

Publication Number Publication Date
EP0562296A1 true EP0562296A1 (fr) 1993-09-29
EP0562296B1 EP0562296B1 (fr) 1995-07-26

Family

ID=6454198

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93102947A Expired - Lifetime EP0562296B1 (fr) 1992-03-16 1993-02-25 Procédé pour le bobinage de matériau fileforme, alimenté en continu de préférence à vitesse constante, en enroulement de précision étagée et dispositif de bobinage pour la mise en oeuvre de ce procédé

Country Status (6)

Country Link
EP (1) EP0562296B1 (fr)
JP (1) JPH06200428A (fr)
KR (1) KR930019535A (fr)
AT (1) ATE125515T1 (fr)
DE (2) DE4208393A1 (fr)
TW (1) TW213889B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0950627A1 (fr) * 1998-04-17 1999-10-20 Schärer Schweiter Mettler AG Procédé et dispositif pour enrouler sur une bobine un fil fourni à vitesse constante
DE10209851A1 (de) * 2002-03-06 2003-09-18 Rieter Ingolstadt Spinnerei Verfahren und Vorrichtung zum Aufwinden eines Fadens an einer Kreuzspuleinrichtung
CN100384709C (zh) * 2002-09-25 2008-04-30 绍勒有限责任两合公司 制造交叉卷绕筒子的方法

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19538480C2 (de) * 1995-10-16 2001-10-25 Sahm Georg Fa Spulmaschine und Verfahren zum Aufwickeln eines kontinuierlich zulaufenden Fadens auf eine Spule
DE19950285A1 (de) * 1999-10-19 2001-04-26 Rieter Ag Maschf Verfahren und Vorrichtung zum Aufwickeln eines Fadens auf eine Spule
DE10352819A1 (de) * 2003-11-12 2005-06-23 Rieter Ingolstadt Spinnereimaschinenbau Ag Verfahren und Spulvorrichtung zum Aufspulen von Garnen an Textilmaschinen
DE102009011843A1 (de) * 2009-03-05 2010-09-09 Oerlikon Textile Gmbh & Co. Kg Verfahren zum Aufspulen von Kreuzspulen mit Präzisionswicklung an einer Doppeldrahtzwirnmaschine
CN112110258A (zh) * 2020-09-19 2020-12-22 许继电源有限公司 一种岸电电缆卷筒张力控制系统及控制方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2649780B2 (de) * 1975-11-05 1979-09-20 Maschinenfabrik Rieter Ag, Winterthur (Schweiz) Wickelmaschine für Textilgarne
EP0055849A2 (fr) * 1980-12-31 1982-07-14 Fritjof Dr.-Ing. Maag Procédé et dispositif de bobinage de fil
EP0150771A2 (fr) * 1984-01-18 1985-08-07 Fritjof Dr.-Ing. Maag Paquet de fil enroulé par bobinage de précision, procédé et dispositif pour sa réalisation
EP0194524A2 (fr) * 1985-03-05 1986-09-17 B a r m a g AG Procédé de bobinage
EP0195325A2 (fr) * 1985-03-11 1986-09-24 B a r m a g AG Procédé de bobinage
DE3920374A1 (de) * 1989-06-22 1991-01-03 Schlafhorst & Co W Verfahren und wickeleinrichtung zum herstellen einer kreuzspule mit stufenpraezisionswicklung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2165600A1 (de) * 1971-02-23 1972-09-14 Leesona Corp., Warwick, R.I. (V.St.A.) Verfahren zur Herstellung eines Garnwickels
DE2947261A1 (de) * 1979-11-23 1981-06-04 Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid Praezisions-kreuzspulkopf in einer praezisions-kreuzspulmaschine
GB2224520B (en) * 1988-11-07 1993-06-23 Appalachian Electronic Instr High speed precision yarn winding system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2649780B2 (de) * 1975-11-05 1979-09-20 Maschinenfabrik Rieter Ag, Winterthur (Schweiz) Wickelmaschine für Textilgarne
EP0055849A2 (fr) * 1980-12-31 1982-07-14 Fritjof Dr.-Ing. Maag Procédé et dispositif de bobinage de fil
EP0150771A2 (fr) * 1984-01-18 1985-08-07 Fritjof Dr.-Ing. Maag Paquet de fil enroulé par bobinage de précision, procédé et dispositif pour sa réalisation
EP0194524A2 (fr) * 1985-03-05 1986-09-17 B a r m a g AG Procédé de bobinage
EP0195325A2 (fr) * 1985-03-11 1986-09-24 B a r m a g AG Procédé de bobinage
DE3920374A1 (de) * 1989-06-22 1991-01-03 Schlafhorst & Co W Verfahren und wickeleinrichtung zum herstellen einer kreuzspule mit stufenpraezisionswicklung

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0950627A1 (fr) * 1998-04-17 1999-10-20 Schärer Schweiter Mettler AG Procédé et dispositif pour enrouler sur une bobine un fil fourni à vitesse constante
DE10209851A1 (de) * 2002-03-06 2003-09-18 Rieter Ingolstadt Spinnerei Verfahren und Vorrichtung zum Aufwinden eines Fadens an einer Kreuzspuleinrichtung
CN100384709C (zh) * 2002-09-25 2008-04-30 绍勒有限责任两合公司 制造交叉卷绕筒子的方法

Also Published As

Publication number Publication date
EP0562296B1 (fr) 1995-07-26
DE4208393A1 (de) 1993-09-23
JPH06200428A (ja) 1994-07-19
DE59300392D1 (de) 1995-08-31
TW213889B (fr) 1993-10-01
KR930019535A (ko) 1993-10-18
ATE125515T1 (de) 1995-08-15

Similar Documents

Publication Publication Date Title
EP0194524B1 (fr) Procédé de bobinage
EP0195325B1 (fr) Procédé de bobinage
EP0561188B1 (fr) Procédé pour le bobinage en enroulement croisé de précision d'un matériau en forme de bande ou de fil
DE2649780A1 (de) Wickelmaschine fuer textilgarne mit reibwalzenantrieb der kreuzspule
DE19833703A1 (de) Verfahren und Vorrichtung zum Aufwickeln von kontinuierlich angeliefertem Spulgut zu einer Präzisionskreuzspule
EP0237892A1 (fr) Procédé et dispositif pour rebobiner des fils
DE2732420C2 (fr)
DE2219755B2 (de) Vorrichtung zum konstanthalten des fadenzuges an praezisionskreuzspulmaschinen
CH630667A5 (de) Schaltungsanordnung an einer einrichtung zur erzeugung eines faserbandes einheitlicher dichte.
EP0562296B1 (fr) Procédé pour le bobinage de matériau fileforme, alimenté en continu de préférence à vitesse constante, en enroulement de précision étagée et dispositif de bobinage pour la mise en oeuvre de ce procédé
EP0055849B1 (fr) Procédé et dispositif de bobinage de fil
EP1951605A1 (fr) Procede pour eviter l'enroulage en ruban
DE3401530A1 (de) Praezisionsspule, sowie verfahren und vorrichtung zu deren herstellung
EP0256383A1 (fr) Méthode pour embobiner des fils
WO1999024344A1 (fr) Procede et dispositif pour bobiner un fil defilant en continu
EP0664765B1 (fr) Procede pour l'enroulement d'un fil en une bobine croisee
DE3241362C2 (de) Fadenspannungsregler
DE2914924A1 (de) Aufspuleinrichtung
DE4126392C1 (en) Appts. for spooling up fibres, preventing slippage and power fluctuations - includes controlling spooling speed by regulating spool spindle revolutions acccording to contact roller speed
EP0093258B1 (fr) Procédé pour éviter des rubans d'ordre entier ou fractionnaire en bobinage croisé au hasard d'un fil
DE3714320C3 (de) Verfahren und Vorrichtung zum Steuern der Fadenspannung in einem Spulautomaten
DE3210244A1 (de) Verfahren zur spiegelstoerung beim aufwickeln eines fadens in wilder wicklung
DE3723593C1 (en) Method for regulating a winding motor acting on a winding spindle on a cross-winding machine and cross-winding machine
EP0476406B1 (fr) Dispositif pour le filage d'un fil avec torsion réelle par une broche et une cloche, et procédé de filage avec un tel dispositif
DE2654944A1 (de) Verfahren und vorrichtung zum aufspulen von garnen, sowie die das garn tragenden spulen (bobinen), die nach diesem verfahren hergestellt sind

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 CH DE FR GB IT LI

17P Request for examination filed

Effective date: 19930916

17Q First examination report despatched

Effective date: 19941107

17Q First examination report despatched

Effective date: 19941208

ITF It: translation for a ep patent filed

Owner name: DE DOMINICIS & MAYER S.R.L.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT CH DE FR GB IT LI

REF Corresponds to:

Ref document number: 125515

Country of ref document: AT

Date of ref document: 19950815

Kind code of ref document: T

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

Effective date: 19950731

REF Corresponds to:

Ref document number: 59300392

Country of ref document: DE

Date of ref document: 19950831

ET Fr: translation filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19960225

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: 19960228

Ref country code: CH

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

Effective date: 19960228

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: CH

Ref legal event code: PL

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

Ref country code: FR

Effective date: 19961031

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

Ref country code: DE

Effective date: 19961101

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

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

Ref country code: GB

Effective date: 19970225

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

Effective date: 19970225

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

Effective date: 20050225