EP0403801B1 - Dispositif ayant un rotor pour la filature à bout libre - Google Patents

Dispositif ayant un rotor pour la filature à bout libre Download PDF

Info

Publication number
EP0403801B1
EP0403801B1 EP19900109363 EP90109363A EP0403801B1 EP 0403801 B1 EP0403801 B1 EP 0403801B1 EP 19900109363 EP19900109363 EP 19900109363 EP 90109363 A EP90109363 A EP 90109363A EP 0403801 B1 EP0403801 B1 EP 0403801B1
Authority
EP
European Patent Office
Prior art keywords
guide body
spinning rotor
fibres
rotor
spinning
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
Application number
EP19900109363
Other languages
German (de)
English (en)
Other versions
EP0403801A1 (fr
Inventor
Stanislav Didek
Petr Blazek
Alois Stejskal
Zdenek Havránek
Jaroslav Slingr
Josef Dolezal
Zelmira Borovcova
Jaroslava Steklikova
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.)
Vyzkumny Ustav Bavlnarsky AS
Original Assignee
Vyzkumny Ustav Bavlnarsky AS
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 Vyzkumny Ustav Bavlnarsky AS filed Critical Vyzkumny Ustav Bavlnarsky AS
Publication of EP0403801A1 publication Critical patent/EP0403801A1/fr
Application granted granted Critical
Publication of EP0403801B1 publication Critical patent/EP0403801B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/04—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques imparting twist by contact of fibres with a running surface
    • D01H4/08—Rotor spinning, i.e. the running surface being provided by a rotor

Definitions

  • the invention relates to an open-end rotor spinning device comprising a one-sidedly open spinning rotor, a positively driven guide body in the form of a ring, tube, or the like, which enters by its rear end coaxially the spinning rotor and whose inner wall serves for depositing supplied fibres, for supportingly guiding and finally delivering them to the spinning rotor, further an immovable covering body which is associated with the front end of the guide body and through which a guide tube or duct extends for supplying fibres to the inner wall of said guide body, and a take-off duct or tube which extends through the axis of the spinning rotor or that of the covering body and which serves for withdrawing yarn out of the spinning rotor, there being provided between the spinning rotor and the guide body an annular spacing through which the communicating spaces of the spinning rotor and the guide body are connected to a first sucking unit.
  • a disadvantage of the above device resides in that it does not allow a wide assortment of yarns from cotton fibres and synthetic cotton-type fibres to be manufactured; actually, there are concerned only the so called carded yarn sorts 14.5 to 100, or 166 tex count for the manufacture of which relatively short and coarse fibres are used. Admittedly, if using finer fibres it is possible to approach even the count range of the so called combed yarn sorts but the final product does not reach the desired quality. It is why such combed yarns of from 5 to 14.5 tex are manufactured exclusively in ring spinning frames from relatively long and fine fibres.
  • an air discharge hole through which the communicating spaces of the spinning rotor and the guide body are connected either to a second sucking unit, there being arranged at least in front of the first sucking unit an air regulating member or at least the first sucking unit having a selectable sucking output, or also to said first sucking unit but in parallel to the annular spacing between the spinning rotor and the guide body, the air regulating members being associated with said annular spacing and the air discharge hole.
  • the process of withdrawing short fibres of exactly predetermined length and of leaving longer fibres of desired length in the spinning process can be effected by adjusting the revolution rates of the spinning rotor and the guide body in a ratio. It is to be noted that the ejected short fibres do not practically mean any production loss, since they can be used for further processing as, for instance, to yarns of another sort.
  • the device can operate as the conventional open-end spinning machine and that it is capable of producing a wider yarn assortment.
  • the fact that almost all air volume leaves the communicating spaces of the spinning rotor and the guide body at the side of front end of the guide body is also advantageous in that the air flows from the guide duct to the air discharge hole on a short path so that it cannot influence in any way the advance of fibres toward the spinning rotor and the process of fibre depositing in its interior.
  • the air discharge hole can be made as a through hole which is provided in the covering body and whose inlet portion at the inner side of said covering body has the form of at least a part of annular cavity and extends in peripheral direction along the inner marginal portion of said guide body, or as an annular gap between the guide body and the covering body.
  • a labyrinth packing should preferably be provided between the front end of the guide body and the covering body, the packing serving for perfectly separating the inlet portion of said through hole from the ambient atmosphere so that no air losses occur.
  • the spinning station or unit forming one consituent of the device according to the invention can be - except for some modifications due to the new system of sucking air off the communicating spaces of the spinning rotor and the guide body - of a usual construction.
  • a conventional open-end rotor spinning machine from a plurality of such units and an air sucking system therefor, the system comprising either a first and a second air sucking system, or the first sucking system only.
  • the spinning rotor 2 of the spinning unit 1 is fixed onto a driven shaft 3 which is mounted for rotation in a bearing bush 4 received for reciprocation in a bushing portion 5 of a rotor box 6 and secured therein by a fastening bolt 7.
  • the spinning rotor 2 has the form of a shallow dish with a flat circular bottom 8, a rounded mouth 9 of a smaller diameter than said bottom 8, and an inner wall 10 outstanding from the bottom 8 and conically tapering toward the mouth 9.
  • the bottom 8 and the wall 10 form together a fibre collecting channel.
  • the rotor box 6 surrounding, at a radial distance, the spinning rotor 2 is provided at its front, also open side with a recess 11 coaxial to the spinning rotor 2, in which a rotary, positively driven guide body 13 is received and mounted by means of an antifriction radial bearing 12.
  • the guide body 13 has the form of an annulus and is provided, at its rear end 14 facing the spinning rotor 2, with a frontal circular recess 15 by which said rear end 14 is radially divided into an inner and an outer portion 16 and 17, respectively; the inner portion 16 is disposed in the mouth 9 of the spinning rotor 2 while the outer portion 17 outside said mouth.
  • annular spacing 18 which connects the communicating spaces of the spinning rotor 2 and the guide body 13 together with an inner air space 19 of the rotor box 6.
  • This inner air space 19 is confined, at the side of the rotor box 6, by its rear wall 20, an annular projection 21 provided in a radial plane with said outer portion 17 of the rear end 14 of the guide body 13 as a sealing partition, and by an inner peripheral wall 22 between said rear wall 20 and said annular projection 21, and communicates via hole 23 with a first sucking pipeline 24.
  • the inner wall 25 of the guide body 13 has the form of the lateral area of a cone, its minimum diameter being at the side of front end 26 of the guide body 13.
  • the rotor box 6 is covered by a removable but otherwise immovable covering body 27 the inner wall 28 of which is spaced apart at a very small distance from the front end 26 of the guide body 13.
  • the device is provided with an air discharge hole constituted by a through hole 29 leading in radial direction to an extended axis X of revolution of the guide body 13 through the body 27, and connected to a second sucking pipeline 30.
  • the inlet portion 31 of said pipeline 30 has the form of an annular cavity and extends in peripheral direction along an inner marginal portion 32 of the guide body 13 as it is apparent from Figure 2.
  • the through hole 29 can be provided in a tubular member inserted into the covering body 27. Such an embodiment is not shown in the drawings.
  • FIG. 3 Another embodiment of the air discharge hole is shown in Figure 3. It consists of an annular gap 33 between the inner marginal portion 32 of the guide body 13 and a peripheral surface 34 of the conical projection 35 provided on the inner wall 28 of said covering body 27, the projection being disposed in the front end 26 of the guide body 13. Also in this embodiment there is provided in the covering body 27 the same through hole 29 as shown in Figure 1.
  • the inlet portion 31 of said hole 29, however, has the form of a complete annular cavity and is an immediate proximity of said conical projection 35.
  • a labyrinth packing 36 consisting, as shown in Figure 1, of an annular projection 37 provided on the inner wall 28 of the covering body 27 and of a corresponding recess 38 on the facing front surface of the front end 26 of the guide body 13. It, however, is to be understood that the packing elements can be arranged in a reversed, or any other alternative embodiment, provided they exhibit a desired, air penetration preventing effect.
  • a guide tube 40 for supplying fibres 39 to the inner wall 25 of the guide body 13 extends through the covering body 27; alternatively, if the conical projection 35 is provided on the inner wall 28 of said body 27 - as hereinabove set forth - the guide tube 40 can be replaced by a guide duct 41 (Fig. 3). In every case, however, also a take-off tube 42 extends through the covering body 27, through which yarn 43 is withdrawn out of the spinning rotor 2.
  • the air sucking system as shown in Figure 1 is a central system for a plurality of spinning stations 1; it comprises a first main conduit 44 which is connected to a first sucking unit 45 with an upstream filtering element 46 and into which enters the first sucking pipeline 24 leading from the individual spinning stations 1.
  • a second main conduit 47 is connected to a second sucking unit 48 into which the second sucking pipeline 30 opens; the latter leads also from the individual spinning stations 1.
  • the two sucking units 45, 48 and the filtering element 46 can be of any structure which is usual for textile machines with air sucking regimes.
  • air regulating members 49, 50 In front of the two sucking units 45, 48 there are arranged air regulating members 49, 50, respectively, e.g. in the form of a valve which, however, can be omitted if installing sucking units 45, 48 with selectable sucking output.
  • Figure 4 shows also an alternative central air sucking system comprising the first main conduit 44 and the second main conduit 47 which are connected together at their homothetic ends to form a central duct 51 which is then connected to the first sucking unit 45 with upstream filtering element 46.
  • the first sucking pipeline 24 enters the first main conduit 44, and the second sucking pipeline 30 the second main conduit 47.
  • the air regulating members 49 and 50 are associated with the annular spacing 18 between the spinning rotor 2 and the guide body 13, and with the through hole 29 in the covering body 27, and are disposed at the ends of said first main conduit 44 and the second main conduit 47, respectively.
  • the filtering element 46 can alternatively be installed in the first main conduit 44 in front of the respective air regulating member 50 as indicated in Fig.4 by dash contours.
  • the two latter elements rotate in the same direction; however, the guide body 13 rotates slower than the spinning rotor but, on the other hand, faster than is the velocity of air supplying fibres 39 to the inner wall 25 of said body 13. Simultaneously, almost all of the volume of fibre carrying air which enters the communicating inner spaces of the spinning rotor 2 and the guide body 13 leaves said spaces at the side of front end 26 of said body 13 whereas only a small, remaining air portion escapes through the annular spacing 18 between the spinning rotor and the guide body.
  • Fibres 39 are supplied, under assistance of air flow, from a fibre opening device (not shown) in which they are separated from a fibrous sliver, and particularly a carded, or drafted sliver. After engaging the inner wall 25 of the guide body 13, the fibres 39 are caused, by the action of centrifugal forces, to advance on this inner wall 25 toward the spinning rotor. Before, however, reaching the wall 10 of the spinning rotor 2, they have first to overcome the annular spacing 18 between the spinning rotor 2 and the guide body 13.
  • Such fibres 39 are then easily entrained by air escaping through the annular spacing 18 between the spinning rotor 2 and the guide body 13 and withdrawn outside the spinning rotor 2 whereas the remaining longer fibres 53 follow undisturbed their way to said spinning rotor 2. Accordingly, it is made possible, within every predetermined ratio between revolutions rates of the spinning rotor 2 and the guide body 13, to withdraw or eject short fibres 52 of a quite definite length and to leave the longer fibres 53 in the spinning process to be processed to yarn of a desired kind and quality.
  • the exact length of fibres 52 to be ejected can also be controlled by adjusting the size of annular spacing 18 between the spinning rotor 2 and the guide body 13. After loosening the bolt 7 securing the bearing bush 4 for the shaft 3 of the spinning rotor 2, both the rotor and the bush can be axially displaced into desired positions wherein the bearing bush 4 can be fastened again by said bolt 7. It, however, has been found out that the size of said annular spacing 18 can be, in many cases, adjusted once for ever.
  • Figure 5 shows successive positions of one and the same short fibre 52.
  • a short fibre 52 takes on its trajectory S a first position P1 on the inner wall 25 of said guide body 13, then a second position P2 in the section U between the inner wall 25 of the guide body 13 and the wall 10 of the spinning rotor 2, a third position P3 in the annular spacing 18 between the spinning rotor 2 and the guide body 13, and a fourth position P4 in the inner air space 19 of the rotor box 6.
  • the corresponding positions P1, P2 and P3 of the short fibre 52 are shown in Figure 6.
  • the annular spacing 18 between the spinning rotor 2 and the guide body 13 can be adjusted to cause short fibres 52 of e.g. 20 mm length to be ejected while the remaining, longer fibres 53 are then processed to a fine combed yarn 43
  • the ejected short fibres 52 accumulated in the filtering element can be then processed to another type of yarns, or fabrics. Since a very pure "waste" is concerned, the short fibres 52 can be returned to the carding machine, and after drafting them on a drawing frame, it is possible to process them to carded yarn sorts, and particularly in the conventional open-end rotor spinning machine, or in the device of the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Claims (9)

  1. Dispositif de filature (1) avec rotor à extrémité ouverte, qui comprend un rotor de filature (2) ouvert sur un côté, un corps de guidage (13) entraîné positivement, ayant la forme d'un anneau, d'un tube ou d'un autre élément similaire, qui pénètre coaxialement par son extrémité arrière dans le rotor de filature (2) et dont une paroi intérieure sert à déposer des fibres amenées (39), pour les guider en les soutenant et finalement les amener au rotor de filature (2), ainsi qu'un corps de couverture (27) ne pouvant être déplacé qui est associé à l'extrémité avant du corps de guidage (13) et à travers lequel s'étend un tube ou conduit (40) de guidage destiné à amener les fibres (39) à la paroi intérieure dudit corps de guidage (13), et un tube ou conduit (42) de sortie qui s'étend sur l'axe du rotor de filature (2) ou du corps de couverture (27) et qui sert à faire sortir un filé hors du rotor de filature (2), sachant qu'il y a entre le rotor de filature (2) et le corps de guidage (13) un intervalle annulaire (18) par lequel les espaces communicants du rotor de filature (2) et du corps de guidage (13) sont reliés à un premier groupe d'aspiration (45),
    le dispositif étant caractérisé en ce qu'un orifice d'évacuation d'air (29) est ménagé sur le côté de l'extrémité avant (26) du corps de guidage (13), orifice par lequel les espaces communicants du rotor de filature (2) et du corps de guidage (13) sont reliés soit à un second groupe d'aspiration (48) soit également au premier groupe d'aspiration (45) mais en parallèle avec l'intervalle annulaire (18) entre le rotor de filature (2) et le corps de guidage (13), sachant qu'est disposé au moins en avant du premier groupe d'aspiration (45) un premier organe (49) de régulation de l'air ou que le premier groupe d'aspiration (45) au moins a une sortie d'aspiration selectionnable et , en avant du second groupe d'aspiration (48), un second organe de régulation (50), les organes (49, 50) de régulation de l'air étant associés audit intervalle annulaire (18) et à l'orifice d'évacuation de l'air (29).
  2. Dispositif de filature avec rotor à extrémité ouverte selon la revendication 1, dans lequel l'orifice d'évacuation de l'air est un trou traversant (29) qui est ménagé dans le corps de couverture (27) et dont la partie d'entrée (31) sur le côté intérieur dudit corps de couverture (27) a la forme d'au moins une partie de cavité annulaire et s'étend dans une direction périphérique le long d'une partie marginale intérieure (32) dudit corps de guidage (13).
  3. Dispositif de filature avec rotor à extrémité ouverte selon la revendication 1, dans lequel l'orifice d'évacuation de l'air est un trou traversant (29) qui est ménagé dans le corps de couverture (27) et dont la partie d'entrée (31) sur le côté intérieur dudit corps de couverture a la forme d'une encoche annulaire (33) entre le corps de guidage (13) et le corps de couverture (27).
  4. Dispositif de filature avec rotor à extrémité ouverte selon la revendication 2 ou 3, dans lequel un élément filtrant (46), destiné à retenir et collecter des fibres, est associé à l'intervalle annulaire (18) entre le rotor de filature (2) et le corps de guidage (13).
  5. Dispositif de filature avec rotor à extrémité ouverte selon la revendication 2, dans lequel est placé un corps d'étanchéité en labyrinthe (36) entre l'extrémité avant (26) du corps de guidage (13) et le corps de couverture (27).
  6. Procédé pour amener à l'aide d'un courant d'air des fibres d'un dispositif d'ouverture de fibres, dans lequel elles sont séparées d'un ruban de libres, à un rotor de filature (2) d'un dispositif de filature avec rotor à extrémité ouverte qui comprend un positivement entraîné unilatérallement ouvert rotor de filature (2) et corps de guidage (13), ayant la forme d'un anneau, d'un tube ou d'un autre élément similaire, aligné avec lui et formant un petit intervalle annulaire (28) avec le rotor de filature (2), le diamètre de l'espace intérieur communicant du rotor de filature (2) et du corps de guidage (13) diminuant depuis la rainure de collecte des fibres du rotor de filature (2) jusqu'à l'extrémité avant (26) du corps de guidage (13), le procédé comprenant le fait d'amener d'abord des fibres sur la paroi intérieure (25) du corps de guidage (13), de laquelle les fibres sont amenées sous l'effet de la force centrifuge à avancer sur cette paroi intérieure (25) en direction du rotor de filature (2) où un filé est formé et extrait par l'intermédiaire d'un conduit de sortie,
    caractérisé en ce que presque tout le volume d'air servant à amener les fibres (39) est extrait de l'espace intérieur communicant du rotor de filature (2) et du corps de guidage (13) par un orifice d'évacuation de l'air (29) sur le côté de l'extrémité avant (26) du corps de guidage (13) tandis que seule une petite partie de l'air s'écoule par l'intervalle annulaire entre le rotor de filature (2) et le corps de guidage (13) et en ce qu'une différence positive de vitesses de rotation est maintenue entre le rotor de filature (2) et le corps de guidage (13).
  7. Procédé selon la revendication 6, caractérisé en ce que de courtes fibres de longueurs exactement prédéterminées sont extraites par l'intervalle annulaire (18) grâce à un réglage du rapport des vitesses de rotation du rotor de filature (2) et du corps de guidage (13).
  8. Procédé selon la revendication 6, caractérisé en ce qu'aucune partie des fibres (39) amenées au rotor de filature (2) n'est extraite ou rejetée par l'intervalle annulaire (18) grâce à un réglage du rapport des vitesses de rotation du rotor de filature (2) et du corps de guidage (13).
  9. Procédé selon l'une quelconque des revendications 6 à 8, caractérisé en ce que presque tout le volume d'air servant à amener les fibres est extrait de l'espace intérieur communicant du rotor de filature (2) et du corps de guidage (13) par l'intermédiaire dudit orifice de décharge (29) en un emplacement diamétralement opposé à l'endroit où les fibres (39) sont amenées par un tube de guidage (40).
EP19900109363 1989-06-21 1990-05-17 Dispositif ayant un rotor pour la filature à bout libre Expired - Lifetime EP0403801B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CS374289A CS274638B2 (en) 1989-06-21 1989-06-21 Rotor spinning device
CS3742/89 1989-06-21

Publications (2)

Publication Number Publication Date
EP0403801A1 EP0403801A1 (fr) 1990-12-27
EP0403801B1 true EP0403801B1 (fr) 1994-04-13

Family

ID=5378401

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900109363 Expired - Lifetime EP0403801B1 (fr) 1989-06-21 1990-05-17 Dispositif ayant un rotor pour la filature à bout libre

Country Status (4)

Country Link
EP (1) EP0403801B1 (fr)
JP (1) JPH03113022A (fr)
CS (1) CS274638B2 (fr)
DE (1) DE69008046T2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4306272A1 (de) * 1993-03-01 1994-09-08 Rieter Ingolstadt Spinnerei Verfahren und Vorrichtung zur Herstellung eines Fadens mit Hilfe einer Offenend-Spinnvorrichtung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT268106B (de) * 1966-03-05 1969-01-27 Vyzk Ustav Bavlnarsky Spinnkammer-Spinnvorrichtung zum kontinuierlichen Spinnen von Textilfasern mit Unterdruck
DE2130738B2 (de) * 1971-06-21 1973-04-19 Offen-end-spinnvorrichtung
GB1419498A (en) * 1972-02-23 1975-12-31 Platt Saco Lowell Ltd Spinning of textile fibres

Also Published As

Publication number Publication date
JPH03113022A (ja) 1991-05-14
EP0403801A1 (fr) 1990-12-27
CS8903742A1 (en) 1990-11-14
DE69008046D1 (de) 1994-05-19
CS274638B2 (en) 1991-09-15
DE69008046T2 (de) 1994-07-28

Similar Documents

Publication Publication Date Title
US3360917A (en) Fiber feeding device for a rotary spinning chamber
USRE30709E (en) Method of removing impurities and similar matter from staple fibres in ringless spinning and device for performing said method
US3481129A (en) Open end spinning apparatus
US3543500A (en) Spinning of textile yarns
EP2530192B1 (fr) Métier à tisser à extrémité ouverte
US4700431A (en) Process and apparatus for eliminating dust from fiber material
US3368340A (en) Method and apparatus for doffing and straightening fibers during combing and spinning thereof
US3115001A (en) Spinning apparatus
US4014162A (en) Fiber supply duct for an open-end spinning unit
US4249370A (en) Method of and apparatus for removing dirt particles from staple fibers and for straightening said fibers in an open-end spinning process
US3357168A (en) Spinning chamber air outlet
US20040025487A1 (en) Method and device for producing a yarn with ring-spun characteristics
EP0403801B1 (fr) Dispositif ayant un rotor pour la filature à bout libre
EP3620558B1 (fr) Carter de cylindre ouvreur pour un dispositif ouvreur d'un métier à filer à bout libre
JP2007505226A (ja) 空気精紡法によって粗紡糸を製造するための練条機・粗紡機組み合わせ体
US4625506A (en) Open-end spinning process and device
US3624995A (en) Method and device for spindleless spinning
US3844100A (en) Apparatus for the open-end spinning of textile yarns
GB2192010A (en) Open-end rotor spinning unit
EP0926275B1 (fr) Métier à filer à bout ouvert pour fabriquer des fils à torsion S ou Z
JP2000064130A (ja) オ―プンエンド精紡機
US5481862A (en) Pneumatically operated debris removal device for an open-end spinning device
US5414990A (en) Process and device for conveying fibers in an airstream in an open-end spinning rotor
US5222352A (en) Process and an arrangement for spinning staple fibers into a yarn
US4495762A (en) Apparatus for separating fibers in open-end spinning units

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): CH DE FR GB IT LI

17P Request for examination filed

Effective date: 19901220

17Q First examination report despatched

Effective date: 19921103

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

ITF It: translation for a ep patent filed

Owner name: BARZANO' E ZANARDO MILANO S.P.A.

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

Ref country code: FR

Payment date: 19940403

Year of fee payment: 5

AK Designated contracting states

Kind code of ref document: B1

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

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

Ref country code: FR

Effective date: 19940413

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

Ref country code: GB

Payment date: 19940504

Year of fee payment: 5

REF Corresponds to:

Ref document number: 69008046

Country of ref document: DE

Date of ref document: 19940519

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

Ref country code: CH

Payment date: 19940609

Year of fee payment: 5

EN Fr: translation not 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
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19950517

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

Ref country code: LI

Effective date: 19950531

Ref country code: CH

Effective date: 19950531

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

Effective date: 19950517

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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

Ref country code: DE

Payment date: 19970623

Year of fee payment: 8

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

Ref country code: DE

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

Effective date: 19990302

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: 20050517