EP0006074A1 - Dispositif et méthode pour calibrer et aligner des tubes à l'aide d'une unité de calibrage pourvue de mâchoires de calibrage - Google Patents

Dispositif et méthode pour calibrer et aligner des tubes à l'aide d'une unité de calibrage pourvue de mâchoires de calibrage Download PDF

Info

Publication number
EP0006074A1
EP0006074A1 EP79810033A EP79810033A EP0006074A1 EP 0006074 A1 EP0006074 A1 EP 0006074A1 EP 79810033 A EP79810033 A EP 79810033A EP 79810033 A EP79810033 A EP 79810033A EP 0006074 A1 EP0006074 A1 EP 0006074A1
Authority
EP
European Patent Office
Prior art keywords
jaws
calibration
movement
pipe
straightening
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
EP79810033A
Other languages
German (de)
English (en)
Other versions
EP0006074B1 (fr
Inventor
Christian Ragettli
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0006074A1 publication Critical patent/EP0006074A1/fr
Application granted granted Critical
Publication of EP0006074B1 publication Critical patent/EP0006074B1/fr
Expired legal-status Critical Current

Links

Images

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
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/30—Finishing tubes, e.g. sizing, burnishing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
    • B21D3/10—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts between rams and anvils or abutments

Definitions

  • the present invention relates to a device for internal or external calibration and for straightening pipe sections with the aid of a calibration unit provided with calibration jaws, to which conveyor rollers are connected on both sides.
  • Calibration devices which have a central calibration unit as well as a feed and a discharge device which are connected to the calibration unit on both sides thereof with the same axis.
  • the feed and discharge devices have driven conveyor rollers. With the help of the conveyor rollers, the mostly 8 - 10 m long pieces of pipe are fed to the calibration unit, where they are calibrated in sections by closing or opening the calibration jaws.
  • the purpose of the present invention is to propose a device which allows a precise calibration and straightening of the pipe section without the pipe or the calibration machine being damaged as a result of overexertion by friction and mass acceleration forces.
  • the device for internal or external calibration and for straightening pipe sections in a calibration unit provided with calibration jaws has on one side a feed device and on the other side a discharge device for the pipe, which are equipped with driven conveyor rollers.
  • the device is characterized in that the vertically adjustable and lockable arranged conveyor rollers under the influence of hydrauli see or pneumatic adjustment units. Z weck bugsssiger manner may be pivotally mounted and moved horizontally on rockers the conveying rollers in the vertical plane.
  • Fig. 1 is a path diagram of the straightening and K is shown alibriervorganges, wherein said to be straightened and calibrated tube, in the H ö- he adjustable and rests by braking lockable wheels and intermittently fed to the straightening and calibration jaws becomes.
  • the curve shows that in a first approach phase A, the closing movement of the jaws up to point B, where the tube is touched by sensors, takes place quickly. The height of the rollers remains unchanged when the brakes are closed.
  • the straightening is then carried out in the straightening phase C at a significantly slower speed and in the next phase D the ovality of the pipe is remedied at an increased speed, while the actual calibration to reduce the pipe diameter in the phase E is significantly slowed down.
  • phases C, D and E the brakes are released so that the height of the support rollers can be changed, as will be described later.
  • the device for internal or external calibration and for straightening workpieces has a central calibration unit 1 which has calibration jaws 3 arranged in a beam around the central axis 2, of which in FIG. 2 - 7 only two opposite are shown purely schematically.
  • Each calibration jaw is equipped with two sensors 4.
  • the calibration jaws 3 are in the sense of an opening or Closing in the radial direction displaced jointly, so that the diameter of an inserted tube in the feeding direction during the closing of the jaws 3 by compressing the B ac- ken 3 is reduced, or a not entirely round pipe is directed accordingly.
  • the common drive of the jaws 3 is not shown in FIGS. 2-7.
  • height-adjustable supporting and conveying rollers 6 are provided, each of which is supported by a double cylinder 7.
  • the double cylinders 7 are arranged vertically and each provided with a piston 8 and 9, which are equipped with a piston rod 10 or 11 extending upwards or downwards.
  • the downwardly extending piston rods 11 connected to the pistons 9 are supported at the other end on a base plate 12, while each oppositely directed piston rod 10 of the pistons 8 carries a carrying and conveying roller 6.
  • a support roller 16 is arranged directly in front of the calibration unit 1, which is supported by means of a single-acting cylinder 13 and piston 14 with the aid of the piston rod 15.
  • the cylinder 13 is supported on the base plate 12 by means of a fixed rod 17.
  • FIG. 2 shows the position of the support and conveyor rollers 6 before they are loaded with a tube.
  • the height of the base plate 12 is adjusted according to the tube diameter, so that the support rollers 6 and the support roller 16 are directed to receive the tube.
  • the load exerted by each of the Rol len 6 can be recorded, corresponds to the load to be borne. If the total weight of the pipe is designated G, a partial load of 6G will fall on each roll, which corresponds to the weight of a pipe section between two rolls 6.
  • the pressure in the upper cylinders 7a is restricted to a load of A G + 10, while the lower cylinders 7b are first kept depressurized.
  • the calibration jaws 3 are then moved together, initially at high speed, until two opposite sensors 4 touch the tube 5. Touching the sensors 4 causes the radial closing movement of the calibration jaws 3 to be stopped immediately. Immediately thereafter, the closing movement is the K alibrierbacken 3 resumed, but is achieved with a much slower motion until the from the Figs. 6 and 7 position shown.
  • the tube 5 is conveyed in the conveying direction by the same amount as the length of the calibration jaws 3 and the jaws 3 are then closed again in two stages, as described.
  • the valves of the double cylinders remain closed until the tube 5 touches the sensors 4. With the touch, the valves of the double cylinder 7 are opened and the closing movement of the calibration jaws continues to be significantly slowed down.
  • a central calibration unit 21 which has calibration jaws 23 arranged radially around a central axis in a frame 22, which can be displaced together in the radial direction in the sense of an opening or closing movement, so that the diameter of a tube inserted in the direction of arrow P is reduced during the closing movement of the jaws 23 by pressing them together, or a pipe that is not completely round is directed accordingly.
  • the common drive of the jaws 23 for radiating merging or driving apart is not shown in the drawing and may be assumed to be essentially known.
  • An electric motor 24 and a hydraulic unit 25, which controls the movement of the jaws 23, are provided for the drive.
  • the drive unit 24 and 25 thus formed is designed such that the normal closing movement of the jaws, which takes place at a high speed, is replaced by a closing movement, which is carried out at a throttled speed, after an intermediate stop in a second phase. Accordingly, the fully opened jaws 23 are first brought together at high speed and brought to a standstill when the tube is touched by sensor 26. The changeover to the second phase is also carried out by these sensors 26, which are arranged offset in the axial direction with respect to the central axis 27 on diametrically opposite jaws.
  • the sensors 26 touch the pipe section (not shown) that is introduced, to be straightened and calibrated, they cause an interruption the closing movement of the jaws and represent the H y draulikisme25 so that the jaws 23 are once again pressed together at a low speed. During the actual straightening and calibration of the pipe section to the prescribed target dimension, the closing speed of the jaws was considerably reduced.
  • Another function of the sensors 26 is to control brakes, as will be described in detail later.
  • a feed device 28 is connected upstream of the central calibration device 21 and a discharge device 46 on the right side.
  • the feed device 28 consists of a floor structure 29 which is designed to receive the entire pipe piece to be machined and has a considerable length, e.g. 9 - 10 m.
  • conveyor rollers 30 are provided, which are each arranged on a support axis 31 running perpendicular to the conveying direction and are driven together.
  • the conveyor rollers 30 are axially displaceably mounted on the support axles 31 and are connected to one another with the aid of a locating centering rope 33 such that when the centering rope is tightened each roller 30 assumes the central position on the axle 31. With the loose rope 33, however, the rollers 30 can be freely moved on their axes 31.
  • Each axis 31 is supported on both ends in an arm 34, which arms 34 are each pivotably fastened in a vertical support 35.
  • the pivot point is designated 36.
  • two arms 34 arranged on the same axis 31 are connected to one another by a V-shaped double arm 37, so that through the parts 34 and 37 each a pivotable rocker 38 is formed.
  • the associated rollers 30 are pivoted in the vertical plane by the rocker movement.
  • Each rocker 38 is influenced by a pneumatic unit and a brake 44, the latter of which can lock the rocker movement.
  • the pneumatic unit has a first air cylinder 39 with a piston and piston rod 40 and a second cylinder 41, also with a piston and piston rod 42, the latter of which is pivotally attached to the base frame 29 by its free end.
  • the two cylinders 39 and 41 are arranged in a common housing, from which the piston rod 40 of the first cylinder 39 extends in the opposite direction to the piston rod 42 of the second cylinder 41 and is connected to the V-shaped tip of the double arm 37.
  • the first cylinder 39 is dimensioned such that the extended piston rod is able to carry the pipe weight and, in addition, 10% of the pipe weight, while the second cylinder 41 has a somewhat smaller load capacity, which is approximately 10% less than the pipe weight.
  • the piston in the first cylinder 39 is pressurized with air and the piston rod 40 is extended, while the second cylinder 41 is without air.
  • the corresponding pressure for the cylinders must be adapted to the respective pipe weight.
  • the height adjustment of the rollers for the different pipe diameters is done by a motor-driven adjustment unit.
  • each rocker 38 is provided with a brake 44 which can lock the rocker in any position.
  • a brake 44 which can lock the rocker in any position.
  • the actuation of the brakes 44 is coupled to the feed device and to the sensors 26, in such a way that the brakes are applied before the onset of the feed and the brakes are released when the sensors 26 are actuated.
  • the discharge device which extends on the other side of the central calibration device 21 coaxially with the feed device 28, has vertically movable conveyor rollers 48 in rockers 47, by means of which the calibrated and directed pipe pieces are removed.
  • the pipe 49 to be machined which is mostly made of sheet metal, must be calibrated and straightened, since it is irregular both in diameter and in the longitudinal direction after production.
  • the tube 49 is first parallel to the feed device 28 and is placed from the side> on the conveyor rollers 30, which are previously brought into the initial position corresponding to the calibration axis, the light barriers 45 being interrupted.
  • the interruption of the light barriers 45 has the effect that the other cylinder 41 also receives air.
  • a nschliessend the tube through the driven feed rollers 30 in the direction of the central calibration device 21 is moved.
  • the brakes 44 are actuated, whereby the rockers 38 are held in their current position.
  • the conveyor rollers 30 can therefore no longer be moved vertically, but are horizontally displaceable on their supporting axes 11.
  • the first feed period ends when the pipe section comprising the pipe end is in the open calibration jaws 23.
  • the drive of the calibrating jaws 23 is activated, whereupon they initially move into the closed position at high speed.
  • the closing movement of the calibration jaws 23 is interrupted.
  • the brakes 44 which block the rockers 38, are released.
  • the closing movement of the calibration jaws 23 is then continued in a second phase at a considerably reduced speed, so that the pipe section is first straightened and then calibrated.
  • the proximity jaws 23 are opened by a proximity switch, in that this proximity switch influences the drive of the jaws 23 accordingly.
  • This proximity switch previously has the effect that the brakes 44 are applied again and the rockers 38 are thus blocked.
  • the conveyor rollers 30 can therefore no longer move vertically, but only move horizontally on the associated support axes 31.
  • the feed is then started again and a further section of the pipe is fed to the central calibration device, etc. Since the actual straightening of the pipe section and the subsequent calibration do not suddenly occur with a large Ge speed occurs, but takes place at a significantly reduced speed of the jaws, no inadmissible bending stresses and surface pressures occur during straightening. Furthermore, the free end of the tube will move smoothly by simultaneously moving the conveyor rollers 30 on the support axles 31.
  • the fully calibrated and directed pipe is fed to the rollers 48 of the discharge device 46.
  • the conveyor rollers 30 Before feeding a new pipe, the conveyor rollers 30 are brought into the central position by tensioning the centering rope 33. As soon as the new pipe lies on the rollers 30, the rope 33 is loosened so that the conveyor rollers 30 can adjust laterally in the horizontal plane. The pipe section is then straightened and calibrated as described.
  • pneumatic means can also be replaced by hydraulic means.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sorting Of Articles (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Wire Processing (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Rollers For Roller Conveyors For Transfer (AREA)
EP79810033A 1978-04-18 1979-04-09 Dispositif et méthode pour calibrer et aligner des tubes à l'aide d'une unité de calibrage pourvue de mâchoires de calibrage Expired EP0006074B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2816722 1978-04-18
DE2816722A DE2816722C3 (de) 1978-04-18 1978-04-18 Einrichtung zum Innen- und Außenkalibrieren sowie zum Richten von Rohrstücken

Publications (2)

Publication Number Publication Date
EP0006074A1 true EP0006074A1 (fr) 1979-12-12
EP0006074B1 EP0006074B1 (fr) 1982-01-20

Family

ID=6037260

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79810033A Expired EP0006074B1 (fr) 1978-04-18 1979-04-09 Dispositif et méthode pour calibrer et aligner des tubes à l'aide d'une unité de calibrage pourvue de mâchoires de calibrage

Country Status (4)

Country Link
US (1) US4255860A (fr)
EP (1) EP0006074B1 (fr)
JP (2) JPS54139874A (fr)
DE (1) DE2816722C3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2551681A1 (fr) * 1983-09-13 1985-03-15 Mannesmann Ag Dispositif pour l'amenee et l'evacuation des tiges de mandrin sur les laminoirs obliques et longitudinaux

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6637121B2 (en) * 2002-01-07 2003-10-28 Byron G. Barefoot Internal weld profile gauge
KR100897986B1 (ko) 2009-02-16 2009-05-18 주식회사 현대알비 네방향 축압 파이프 잔류 응력 제거용 교정장치
AT511378B1 (de) 2011-05-02 2013-11-15 Waagner Biro Austria Stage Systems Ag Hebevorrichtung zum vertikalen anheben von lasten
KR20190020697A (ko) * 2016-06-22 2019-03-04 테오도르 그뢰베너 게엠베하 운트 코. 카게 중공의 구성요소들을 측정 및 교정하기 위한 장치 및 이러한 장치를 사용하는 방법
CN107377687A (zh) * 2017-08-30 2017-11-24 兰州兰石集团有限公司 一种矫直机
CN109290397A (zh) * 2018-11-14 2019-02-01 浙江中达特钢股份有限公司 一种立式管校直装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1046983B (de) * 1956-10-30 1958-12-18 Sutton Eng Co Zufuehr- oder Auslauftisch fuer Richtmaschinen
US3332675A (en) * 1964-06-09 1967-07-25 Raymond Int Inc Cutting metal tubing
DE1527335A1 (de) * 1965-08-16 1972-01-13 Harten Geb Boers Gertrud Van Beschickungsvorrichtung fuer Maschinen zum Biegen von Rohren,Stangen od.dgl.
DE2524310B2 (de) * 1975-06-02 1978-06-22 Gebrueder Roecher, Maschinen- U. Apparatebau, 5904 Eiserfeld-Eisern Hydraulische Richtpresse für stabförmige Werkstücke

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2519221A (en) * 1945-07-27 1950-08-15 Bogen Samuel Electromagnetic and photoelectric mechanism and method for continuous tube gauging
US3568485A (en) * 1968-08-09 1971-03-09 Republic Steel Corp Method and apparatus for straightening and testing workpieces
GB1410075A (en) * 1972-12-07 1975-10-15 British Insulated Callenders Observation method and equipment
US4071958A (en) * 1975-04-04 1978-02-07 Aichi Steel Works, Limited Device for inspecting inner diameter and bending of pipe

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1046983B (de) * 1956-10-30 1958-12-18 Sutton Eng Co Zufuehr- oder Auslauftisch fuer Richtmaschinen
US3332675A (en) * 1964-06-09 1967-07-25 Raymond Int Inc Cutting metal tubing
DE1527335A1 (de) * 1965-08-16 1972-01-13 Harten Geb Boers Gertrud Van Beschickungsvorrichtung fuer Maschinen zum Biegen von Rohren,Stangen od.dgl.
DE2524310B2 (de) * 1975-06-02 1978-06-22 Gebrueder Roecher, Maschinen- U. Apparatebau, 5904 Eiserfeld-Eisern Hydraulische Richtpresse für stabförmige Werkstücke

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2551681A1 (fr) * 1983-09-13 1985-03-15 Mannesmann Ag Dispositif pour l'amenee et l'evacuation des tiges de mandrin sur les laminoirs obliques et longitudinaux

Also Published As

Publication number Publication date
EP0006074B1 (fr) 1982-01-20
DE2816722C3 (de) 1981-01-08
US4255860A (en) 1981-03-17
DE2816722A1 (de) 1979-10-25
JPS54139874A (en) 1979-10-30
DE2816722B2 (de) 1980-05-14
JPS59180810U (ja) 1984-12-03
JPS6116887Y2 (fr) 1986-05-24

Similar Documents

Publication Publication Date Title
DE3048891C2 (de) Bewegungsgetriebe zum Bewegen eines Arbeitsglieds
DE1556165C3 (de) Vorrichtung zur Bewegungssteuerung einzelner Gegenstande auf einem Sam melförderer
DE2729605C2 (de) Vorrichtung zum Trennen von Werkstücken von einem Stapel
DE2334438B2 (de) Fertigungsstraße zum Lochen von Profilen
DE3306132C2 (fr)
EP0006074B1 (fr) Dispositif et méthode pour calibrer et aligner des tubes à l'aide d'une unité de calibrage pourvue de mâchoires de calibrage
DE4308032C2 (de) Verfahren und Vorrichtung zum Ablängen von Stücken von einem stangenförmigen Profilmaterial
DE2211261C3 (fr)
DE60016146T2 (de) Drahtzuführungsvorrichtung
CH536770A (de) Vorrichtung zum Entstapeln von Blechfolien und/oder Blechtafeln
DE1914647C3 (de) Zuführvorrichtung für stangen- oder rohrförmige Werkstücke in eine Richtmaschine
DE2716298C2 (de) Vorrichtung zum Einstoßen von Rohrluppen in den Walzspalt eines Stopfenwalzwerkes
EP0307883A2 (fr) Circuit intégré pour un manipulateur ainsi que presse à forger fonctionnant avec celui-ci un manipulateur avec un dispositif de mesure correspondant
EP0481462A1 (fr) Machine-outil pourvue d'une tête produisant un faisceau laser pour l'usinage et pour la séparation de tubes
DE3831184A1 (de) Integrierte steuerung fuer einen manipulator und eine mit diesem zusammen wirkende freiform-schmiedepresse sowie manipulator mit messvorrichtung hierzu
EP0012829B1 (fr) Machine de redressage
EP0118062B1 (fr) Enrouleur de feuillard, en particulier pour enrouler sous plancher dans un train à feuillard à chaud avec un dispositif d'ajustage pour les galets-presseurs et/ou les cuvettes de renvoi
EP3331790B1 (fr) Dispositif de remplissage d'un pot de filature avec un ruban de fibres
DE2849413A1 (de) Vorrichtung zum transport von kernbrennstofftabletten von einer tablettenschleifmaschine auf ein fuelltablett
DE102005033399A1 (de) Stufenableger und Verfahren zur Ansteuerung eines Stufenablegers
EP1293268B1 (fr) Procédé pour faire fonctionner un laminoir à pas de pélerin à froid et laminoir à pas de pélerin à froid
CH413637A (de) Vorrichtung zum Hinterschleifen
DE889583C (de) Geraet zum Geraderichten des Endes von aufgewundenem handelsueblichem Walzdraht
DE2103444C3 (de) Maschine zum Aufschneiden von Maschenwarenschläuchen
EP0043364B1 (fr) Installation pour introduire un faux lingot flexible dans une machine de coulée continue

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

Designated state(s): BE CH FR GB LU NL SE

17P Request for examination filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): BE CH FR GB LU NL SE

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

Ref country code: LU

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

Effective date: 19820430

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

Ref country code: LU

Payment date: 19830407

Year of fee payment: 5

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

Ref country code: BE

Payment date: 19910321

Year of fee payment: 13

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

Ref country code: CH

Payment date: 19920330

Year of fee payment: 14

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

Ref country code: FR

Payment date: 19920408

Year of fee payment: 14

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

Ref country code: GB

Payment date: 19920410

Year of fee payment: 14

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

Ref country code: SE

Payment date: 19920413

Year of fee payment: 14

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

Ref country code: BE

Effective date: 19920430

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

Ref country code: NL

Payment date: 19920430

Year of fee payment: 14

BERE Be: lapsed

Owner name: RAGETTLI CHRISTIAN

Effective date: 19920430

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

Ref country code: GB

Effective date: 19930409

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

Ref country code: SE

Effective date: 19930410

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

Ref country code: CH

Effective date: 19930430

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

Ref country code: NL

Effective date: 19931101

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

Effective date: 19930409

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19931229

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

EUG Se: european patent has lapsed

Ref document number: 79810033.5

Effective date: 19931110

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