EP0042011A2 - Device for the production of tubes by helically winding a preferably corrugated strip - Google Patents

Device for the production of tubes by helically winding a preferably corrugated strip Download PDF

Info

Publication number
EP0042011A2
EP0042011A2 EP80105664A EP80105664A EP0042011A2 EP 0042011 A2 EP0042011 A2 EP 0042011A2 EP 80105664 A EP80105664 A EP 80105664A EP 80105664 A EP80105664 A EP 80105664A EP 0042011 A2 EP0042011 A2 EP 0042011A2
Authority
EP
European Patent Office
Prior art keywords
rollers
inlet
rotation
roller
axes
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
EP80105664A
Other languages
German (de)
French (fr)
Other versions
EP0042011A3 (en
EP0042011B1 (en
Inventor
Günter Schäfer
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.)
Fritz Hahn & Co KG GmbH
Original Assignee
Fritz Hahn & Co KG GmbH
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
Priority claimed from DE19803022575 external-priority patent/DE3022575C3/en
Application filed by Fritz Hahn & Co KG GmbH filed Critical Fritz Hahn & Co KG GmbH
Priority to AT80105664T priority Critical patent/ATE7464T1/en
Publication of EP0042011A2 publication Critical patent/EP0042011A2/en
Publication of EP0042011A3 publication Critical patent/EP0042011A3/en
Application granted granted Critical
Publication of EP0042011B1 publication Critical patent/EP0042011B1/en
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, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles 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
    • B21C37/12—Making tubes or metal hoses with helically arranged seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles 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
    • B21C37/12—Making tubes or metal hoses with helically arranged seams
    • B21C37/124—Making tubes or metal hoses with helically arranged seams the tubes having a special shape, e.g. with corrugated wall, flexible tubes

Definitions

  • the invention relates to a device for producing pipes by helically winding a preferably corrugated band with a winding device made of freely rotatable support rollers arranged in a circle on the outer circumference of the pipe to be wound, their axes of rotation parallel to one another and to the longitudinal axis of the pipe to be wound on a common carrier plate are arranged, with two drivable feed rollers arranged at the entry point of the belt into the winding device, acting on the two broad sides of the belt, and with two drivable drive rollers arranged at a distance in front of the pair of entry rollers, also acting on the broad sides of the belt, the carrier plate being such is arranged that the center axis running through the center of the circle formed by the support rollers and parallel to the axes of rotation of the support rollers is the plane determined by the axes of rotation of the inlet rollers in the pitch angle of the R to be wound ear cutting to
  • a known device of this type has the disadvantage of only a very low production speed
  • the object of the present invention is to develop a device of the type mentioned at the outset such that pipes of any length can be produced in a simple manner at high working speed.
  • the object is achieved in that the peripheral speed of the inner run-in roller arranged inside the winding device is lower than the peripheral speed of the outer run-in roller arranged outside the winding device.
  • the inner infeed roller advantageously has a smaller diameter than the outer infeed roller.
  • the Slip of the inner feed roller with respect to the outer feed roller is preferably 0.2 to 0.5 mm per revolution of the inner feed roller.
  • the carrier plate is arranged such that the central axis intersects the plane determined by the axes of rotation of the inlet rollers in the intersection line of this plane with the plane running through the center of the inlet rollers and perpendicular to the axes of rotation of the inlet rollers.
  • the carrier plate preferably has an abutment surface which is inclined at an angle of 90 ° to the central axis and which is inclined by the pitch angle of the tube to be wound and which bears on a holding surface perpendicular to the axes of rotation of the inlet rollers, and is the carrier plate in the winding direction of the band around the central axis rotated arranged that the line of intersection of the plane of the contact surface with a plane perpendicular to the central axis intersects the plane extending through the axes of rotation of the feed rollers at an acute cutting angle.
  • the cutting angle is preferably 0.5 to 1.5 °.
  • the carrier plate is advantageously of annular design.
  • the carrier plate is preferably releasably attached to the holding surface.
  • a belt guide is arranged between the feed rollers and the drive rollers.
  • the peripheral speed of the drive rollers is advantageously greater than the peripheral speed of the outer feed roller.
  • the slip of the drive rollers to the outer feed roller is preferably 0.2 to 0.5 mm per revolution of the drive rollers.
  • a bending roller is preferably arranged between the belt guide and the inlet rollers, said bending roller projecting beyond the connecting line between the inlet point and the belt guide in the direction of the central axis of the winding device.
  • the bending roller can preferably be rotated about an axis of rotation parallel to the axes of rotation of the infeed roller.
  • the bending roller is advantageously displaceable and fixable in the direction of the central axis.
  • a holder 1 has a holding surface 2, on which a winding device 3 is arranged.
  • the winding device 3 has an annular support plate 4, which carries annularly arranged, freely rotatable support rollers 5 on the outer circumference of the tube to be wound, the axes of rotation 6 of which are parallel to one another.
  • the central axis 7 running through the center M of the circle formed by the axes of rotation 6 of the support rollers 5 and parallel to the axes of rotation 6 of the support rollers is equal to the central longitudinal axis of the tube to be wound.
  • two entry rollers 9 and 10 are arranged which can be driven and which act on the two broad sides of the strip.
  • the inner infeed roller 9 is arranged inside the winding device 3, while the outer infeed roller 10 is arranged outside the winding device.
  • the feed rollers can be rotated about axes of rotation 11 perpendicular to the holding surface 2 and can be driven by a drive device, not shown.
  • the inner feed roller 9 has a smaller peripheral speed than the outer feed roller 10.
  • the carrier plate 4 has an abutment surface 12 which extends to the central axis 7 at an angle of 90 ° by the pitch angle ⁇ of the pipe to be wound and which bears on the holding surface 2, so that the axes of rotation 6 of the Support rollers 5 or the central axis 7 intersect the plane designated by 13 in the pitch angle, determined by the axes of rotation 11 of the inlet rollers 9 and 10.
  • the carrier plate 4 is arranged on the holding surface 2 such that the central axis 7, the plane determined by the axes of rotation 11 of the inlet rollers 9, 10, designated by 13 in the line of intersection of this plane with that through the center of the inlet rollers 9 and 10, perpendicular to the axes of rotation 11 of the infeed rollers run, 14 designated plane intersects.
  • the band 8 to be wound runs symmetrically to this plane, which is designated by 14.
  • the carrier plate 4 is arranged rotated about the central axis 7 in the winding direction indicated by the arrow 15 in such a way that the line of intersection of the contact surface 12 designated with 16 has a plane perpendicular to the central axis 7 (in FIG. 2, for example the level denoted by 17) by intersects the axes of rotation 11 of the inlet rollers 9 and 10, designated 13 at an acute cutting angle ⁇ .
  • two drive rollers 18 are arranged on the holder 1, which also act on the broad sides of the belt 8.
  • the drivable drive rollers 18 are rotatable about axes of rotation 19 perpendicular to the holding surface 2, the plane running through the axes of rotation 19, designated by 20, running parallel to the plane designated by 13 through the axes of rotation 11 of the feed rollers 9 and 10.
  • a belt guide 21 is arranged between the drive rollers 18 and inlet rollers 9 and 10. The peripheral speed of the drive rollers 18 is greater than the peripheral speed of the outer feed roller 10.
  • a bending roller 22 which can be rotated about an axis of rotation 23 perpendicular to the contact surface 2 and is arranged on the holder so as to be displaceable and fixable in the direction of the central axis 7.
  • the bending roller 22 is set such that it projects beyond the connecting line between the entry point and the belt guide 21 in the direction of the central axis 7, as shown in FIG. 1.
  • the band In the manufacture of a tube by helically winding the band 8, the band is first fed in the direction of the arrow labeled 24 to the drive rollers 18, which feed it through the band guide 21 and via the bending roller 22 to the inlet roller pair 9 and 10 of the winding device 3.
  • the band 8 In the winding device, the band 8 is wound helically to form a tube, the feed rollers 9 and 10 establishing the connection of the incoming band with the tube that has already been wound.
  • the wound tube is withdrawn from the winding device 3 in the direction of the arrow labeled 25.
  • the slip between the two inlet rollers or between the outer inlet roller and the drive rollers is 0.2 to 0.5 mm per revolution of the inner inlet roller or the drive rollers.
  • a value of 0.5 to 1.5 0 was found to be favorable for the cutting angle f.
  • the ring-shaped carrier plate 4 is releasably attached to the holding surface 2 of the holder 1, so that another winding device with the corresponding diameter can be fastened to the holder 1 in order to produce a tube with a different diameter.
  • the fact that the inner feed roller 9 has a very small diameter not only makes bending work easier, but it is also possible to produce tubes with a very small diameter.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Abstract

Diese Vorrichtung hat eine Wickeleinrichtung (3) aus kreisförmig am Außenumfang des zu wickelnden Rohres angeordneten Stützrollen (5) und mit zwei an der Einlaufstelle des Bandes (8) in die Wickeleinrichtung angeordneten, an den beiden Breitseiten des Bandes angreifenden, antreibbaren Einlaufrollen (9, 10).This device has a winding device (3) comprising support rollers (5) arranged in a circle on the outer circumference of the tube to be wound and with two drivable inlet rollers (9, 9) arranged at the entry point of the band (8) into the winding device and engaging on the two broad sides of the band. 10).

Zur Erzielung einer hohen Herstellungsgeschwindigkeit des Bandes (8) ist die Umfangsgeschwindigkeit der innerhalb der Wickeleinrichtung (3) angeordneten, inneren Einlaufrolle (9) kleiner als die Umfangsgeschwindigkeit der außerhalb der Wickeleinrichtung angeordneten, äußeren Einlaufrolle (10).

Figure imgaf001
In order to achieve a high production speed of the belt (8), the peripheral speed of the inner inlet roller (9) arranged inside the winding device (3) is lower than the peripheral speed of the outer inlet roller (10) arranged outside the winding device.
Figure imgaf001

Description

Die Erfindung bezieht sich auf eine Vorrichtung zum Herstellen von Rohren durch schraubenlinienförmiges Wickeln eines vorzugsweise gewellten Bandes mit einer Wickeleinrichtung aus kreisförmig am Außenumfang des zu wickelnden Rohres angeordneten, frei drehbaren Stützrollen, deren zueinander und zur Längsachse des zu wickelnden Rohres parallele Drehachsen auf einer gemeinsamen Trägerplatte angeordnet sind, mit zwei an der Einlaufstelle des Bandes in die Wickeleinrichtung angeordneten, an den beiden Breitseiten des Bandes angreifenden, antreibbaren Einlaufrollen und mit zwei im Abstand vor dem Einlaufrollenpaar angeordneten, ebenfalls an den Breitseiten des Bandes angreifenden, antreibbaren Antriebsrollen, wobei die Trägerplatte derart angeordnet ist, daß die durch den Mittelpunkt des von den Stützrollen gebildeten Kreises und parallel zu den Drehachsen der Stützrollen verlaufende Mittelachse die durch die Drehachsen der Einlaufrollen bestimmte Ebene im Steigungswinkel des zu wickelnden Rohres schneideto Eine bekannte derartige Vorrichtung weist den Nachteil einer nur sehr kleinen Herstellungsgeschwindigkeit auf. Nachteilig ist insbesondere, daß das bereits gewickelte Rohr oftmals aus der Wickeleinrichtung, insbesondere bei größerer Länge des Rohres, herausfällt, so daß das Band neu in die Vorrichtung eingelegt werden muß, was zu großen Verzögerungen in der Herstellung des Rohres führt.The invention relates to a device for producing pipes by helically winding a preferably corrugated band with a winding device made of freely rotatable support rollers arranged in a circle on the outer circumference of the pipe to be wound, their axes of rotation parallel to one another and to the longitudinal axis of the pipe to be wound on a common carrier plate are arranged, with two drivable feed rollers arranged at the entry point of the belt into the winding device, acting on the two broad sides of the belt, and with two drivable drive rollers arranged at a distance in front of the pair of entry rollers, also acting on the broad sides of the belt, the carrier plate being such is arranged that the center axis running through the center of the circle formed by the support rollers and parallel to the axes of rotation of the support rollers is the plane determined by the axes of rotation of the inlet rollers in the pitch angle of the R to be wound ear cutting to A known device of this type has the disadvantage of only a very low production speed. A particular disadvantage is that the tube which has already been wound often falls out of the winding device, in particular when the tube is longer, so that the tape has to be reinserted into the device, which leads to great delays in the manufacture of the tube.

Die Aufgabe der vorliegenden Erfindung besteht darin, eine Vorrichtung der eingangs genannten Art derart weiterzubilden, daß mit großer Arbeitsgeschwindigkeit auf einfache Art und Weise beliebig lange Rohre herstellbar sind.The object of the present invention is to develop a device of the type mentioned at the outset such that pipes of any length can be produced in a simple manner at high working speed.

Die Aufgabe wird dadurch gelöst, daß die Umfangsgeschwindigkeit der innerhalb der Wickeleinrichtung angeordneten, inneren Einlaufrolle kleiner ist, als die Umfangsgeschwindigkeit der außerhalb der Wickeleinrichtung angeordneten, äußeren Einlaufrolle.The object is achieved in that the peripheral speed of the inner run-in roller arranged inside the winding device is lower than the peripheral speed of the outer run-in roller arranged outside the winding device.

Vorteilhaft weist die innere Einlaufrolle einen kleineren Durchmesser als die äußere Einlaufrolle auf. Der Schlupf der inneren Einlaufrolle in bezug zur äußeren Einlaufrolle beträgt vorzugsweise 0,2 bis 0,5 mm pro Umdrehung der inneren Einlaufrolle.The inner infeed roller advantageously has a smaller diameter than the outer infeed roller. The Slip of the inner feed roller with respect to the outer feed roller is preferably 0.2 to 0.5 mm per revolution of the inner feed roller.

Bei einer bevorzugten Ausführungsform ist die Trägerplatte derart angeordnet, daß die Mittelachse die durch die Drehachsen der Einlaufrollen bestimmte Ebene in der Schnittlinie dieser Ebene mit der durch die Mitte der Einlaufrollen und senkrecht zu den Drehachsen der Einlaufrollen verlaufenden Ebene schneidet.In a preferred embodiment, the carrier plate is arranged such that the central axis intersects the plane determined by the axes of rotation of the inlet rollers in the intersection line of this plane with the plane running through the center of the inlet rollers and perpendicular to the axes of rotation of the inlet rollers.

Vorzugsweise weist die Trägerplatte eine zur Mittelachse in einem Winkel von 90° vermehrt um den Steigungswinkel des zu wickelndes Rohres geneigt verlaufende Anlagefläche auf, die an einer zu den Drehachsen der Einlaufrollen senkrechten Haltefläche anliegt, und ist die Trägerplatte in Wickelrichtung des Bandes um die Mittelachse derart gedreht angeordnet, daß die Schnittlinie der Ebene der Anlagefläche mit einer zur Mittelachse senkrechten Ebene die durch die Drehachsen der Einlaufrollen verlaufende Ebene in einem spitzen Schnittwinkel schneidet. Vorzugsweise beträgt der Schnittwinkel 0,5 bis 1,5°. Die Trägerplatte ist vorteilhaft kreisringförmig ausgebildet. Vorzugsweise ist die Trägerplatte an der Haltefläche lösbar befestigt.The carrier plate preferably has an abutment surface which is inclined at an angle of 90 ° to the central axis and which is inclined by the pitch angle of the tube to be wound and which bears on a holding surface perpendicular to the axes of rotation of the inlet rollers, and is the carrier plate in the winding direction of the band around the central axis rotated arranged that the line of intersection of the plane of the contact surface with a plane perpendicular to the central axis intersects the plane extending through the axes of rotation of the feed rollers at an acute cutting angle. The cutting angle is preferably 0.5 to 1.5 °. The carrier plate is advantageously of annular design. The carrier plate is preferably releasably attached to the holding surface.

Bei einer vorteilhaften Weiterbildung der Vorrichtung ist zwischen Einlaufrollen und Antriebsrollen eine Bandführung angeordnet.In an advantageous development of the device, a belt guide is arranged between the feed rollers and the drive rollers.

Vorteilhaft ist die Umfangsgeschwindigkeit der Antriebsrollen größer als die Umfangsgeschwindigkeit der äußeren Einlaufrolle. Der Schlupf der Antriebsrollen zu der äußeren Einlaufrolle beträgt vorzugsweise 0,2 bis 0,5 mm pro Umdrehung der Antriebsrollen.The peripheral speed of the drive rollers is advantageously greater than the peripheral speed of the outer feed roller. The slip of the drive rollers to the outer feed roller is preferably 0.2 to 0.5 mm per revolution of the drive rollers.

Zwischen Bandführung und Einlaufrollen ist vorzugsweise eine Biegerolle angeordnet, die die Verbindungslinie zwischen der Einlaufstelle und der Bandführung in Richtung auf die Mittelachse der Wickeleinrichtung überragt. Vorzugsweise ist die Biegerolle um eine zu den Drehachsen der Einlaufrolle parallele Drehachse dreh-' bar. Vorteilhaft ist die Biegerolle in Richtung zur Mittelachse verschiebbar und festlegbar angeordnet.A bending roller is preferably arranged between the belt guide and the inlet rollers, said bending roller projecting beyond the connecting line between the inlet point and the belt guide in the direction of the central axis of the winding device. The bending roller can preferably be rotated about an axis of rotation parallel to the axes of rotation of the infeed roller. The bending roller is advantageously displaceable and fixable in the direction of the central axis.

Die Erfindung ist in den Zeichnungen beispielhaft dargestellt. Es zeigen:

  • Fig. 1 die Vorrichtung in Seitenansicht,
  • Fig. 2 die Vorrichtung in Draufsicht.
The invention is illustrated by way of example in the drawings. Show it:
  • 1 shows the device in side view,
  • Fig. 2 shows the device in plan view.

Nach den Fig. 1 und 2 hat eine Halterung 1 eine Haltefläche 2, an der eine Wickeleinrichtung 3 angeordnet ist. Die Wickeleinrichtung 3 hat eine kreisringförmig ausgebildete Trägerplatte 4, die kreisringförmig am Außenumfang des zu wickelnden Rohres angeordnete, frei drehbare Stützrollen 5 trägt, deren Drehachsen 6 zueinander parallel sind. Die durch den Mittelpunkt M des von den Drehachsen 6 der Stützrollen 5 gebildeten Kreises und parallel zu den Drehachsen 6 der Stützrollen verlaufende Mittelachse 7 ist gleich der mittleren Längsachse des zu wickelnden Rohres.1 and 2, a holder 1 has a holding surface 2, on which a winding device 3 is arranged. The winding device 3 has an annular support plate 4, which carries annularly arranged, freely rotatable support rollers 5 on the outer circumference of the tube to be wound, the axes of rotation 6 of which are parallel to one another. The central axis 7 running through the center M of the circle formed by the axes of rotation 6 of the support rollers 5 and parallel to the axes of rotation 6 of the support rollers is equal to the central longitudinal axis of the tube to be wound.

An der Einlaufstelle des zu wickelnden Bandes 8 in die Wickeleinrichtung 3 sind zwei Einlaufrollen 9 und 10 angeordnet, die antreibbar sind und die an den beiden Breitseiten des Bandes angreifen. Die innere Einlaufrolle 9 ist innerhalb der Wickeleinrichtung 3 angeordnet, während die äußere Einlaufrolle 10 außerhalb der Wickeleinrichtung angeordnet ist. Die Einlaufrollen sind um senkrecht zur Haltefläche 2 stehende Drehachsen 11 drehbar und von einer nicht gezeigten Antriebsvorrichtung antreibbar. Die innere Einlaufrolle 9 weist eine kleinere Umfangsgeschwindigkeit als die äußere Einlauf rolle 10 auf.At the entry point of the strip 8 to be wound into the winding device 3, two entry rollers 9 and 10 are arranged which can be driven and which act on the two broad sides of the strip. The inner infeed roller 9 is arranged inside the winding device 3, while the outer infeed roller 10 is arranged outside the winding device. The feed rollers can be rotated about axes of rotation 11 perpendicular to the holding surface 2 and can be driven by a drive device, not shown. The inner feed roller 9 has a smaller peripheral speed than the outer feed roller 10.

Wie insbesondere die Fig. 2 erkennen läßt, weist die Trägerplatte 4 eine zur Mittelachse 7 in einem Winkel von 90° vermehrt um den Steigungswinkel α des zu wickelnden Rohres verlaufende Anlagefläche 12 auf, die an der Haltefläche 2 anliegt, so daß die Drehachsen 6 der Stützrollen 5 bzw. die Mittelachse 7 die durch die Drehachsen 11 der Einlaufrollen 9 und 10 bestimmte, mit 13 bezeichnete Ebene in dem Steigungswinkeldl schneiden. Weiter ist die Trägerplatte 4 derart auf der Haltefläche 2 angeordnet, daß die Mittelachse 7 die durch die Drehachsen 11 der Einlaufrollen 9, 10 bestimmte, mit 13 bezeichnete Ebene in der Schnittlinie dieser Ebene mit der durch die Mitte der Einlaufrollen 9 und 10, senkrecht zu den Drehachsen 11 der Einlaufrollen verlaufen, mit 14 bezeichneten Ebene schneidet. Wie Fig. 2 weiter erkennen läßt, verläuft das zu wickelnde Band 8 symmetrisch zu dieser mit 14 bezeichneten Ebene.As can be seen in particular in FIG. 2, the carrier plate 4 has an abutment surface 12 which extends to the central axis 7 at an angle of 90 ° by the pitch angle α of the pipe to be wound and which bears on the holding surface 2, so that the axes of rotation 6 of the Support rollers 5 or the central axis 7 intersect the plane designated by 13 in the pitch angle, determined by the axes of rotation 11 of the inlet rollers 9 and 10. Furthermore, the carrier plate 4 is arranged on the holding surface 2 such that the central axis 7, the plane determined by the axes of rotation 11 of the inlet rollers 9, 10, designated by 13 in the line of intersection of this plane with that through the center of the inlet rollers 9 and 10, perpendicular to the axes of rotation 11 of the infeed rollers run, 14 designated plane intersects. As can also be seen in FIG. 2, the band 8 to be wound runs symmetrically to this plane, which is designated by 14.

Wie die Fig. 1 erkennen läßt, ist die Trägerplatte 4 in der mit dem Pfeil 15 bezeichneten Wickelrichtung um die Mittelachse 7 derart gedreht angeordnet, daß die mit 16 bezeichnete Schnittlinie der Anlagefläche 12 mit einer zur Mittelachse 7 senkrechten Ebene (in Fig. 2 beispielsweise die mit 17 bezeichnete Ebene) die durch die Drehachsen 11 der Einlaufrollen 9 und 10 verlaufende, mit 13 bezeichnete Ebene in einem spitzen Schnittwinkel ß schneidet.As can be seen in FIG. 1, the carrier plate 4 is arranged rotated about the central axis 7 in the winding direction indicated by the arrow 15 in such a way that the line of intersection of the contact surface 12 designated with 16 has a plane perpendicular to the central axis 7 (in FIG. 2, for example the level denoted by 17) by intersects the axes of rotation 11 of the inlet rollers 9 and 10, designated 13 at an acute cutting angle β.

Im Abstand vor der Einlaufstelle der Wickeleinrichtung 3 sind an der Halterung 1 zwei Antriebsrollen 18 angeordnet, die ebenfalls an den Breitseiten des Bandes 8 angreifen. Die antreibbaren Antriebsrollen 18 sind um zur Haltefläche 2 senkrechte Drehachsen 19 drehbar, wobei die durch die Drehachsen 19 verlaufende, mit 20 bezeichnete Ebene parallel zu der mit 13 bezeichneten Ebene durch die Drehachsen 11 der Einlaufrollen 9 und 10 verläuft. Weiterhin ist zwischen den Antriebsrollen 18 und Einlaufrollen 9 und 10 eine Bandführung 21 angeordnet. Die Umfangsgeschwindigkeit der Antriebsrollen 18 ist größer als die Umfangsgeschwindigkeit der äußeren Einlaufrolle 10.At a distance from the entry point of the winding device 3, two drive rollers 18 are arranged on the holder 1, which also act on the broad sides of the belt 8. The drivable drive rollers 18 are rotatable about axes of rotation 19 perpendicular to the holding surface 2, the plane running through the axes of rotation 19, designated by 20, running parallel to the plane designated by 13 through the axes of rotation 11 of the feed rollers 9 and 10. Furthermore, a belt guide 21 is arranged between the drive rollers 18 and inlet rollers 9 and 10. The peripheral speed of the drive rollers 18 is greater than the peripheral speed of the outer feed roller 10.

Zwischen Bandführung 21 und Einlaufrollen 9 und 10 ist eine Biegerolle 22 angeordnet, die um eine zu der Anlagefläche 2 senkrechte Drehachse 23 drehbar ist und in Richtung zur Mittelachse 7 verschiebbar und festlegbar an der Halterung angeordnet ist. Die Biegerolle 22 ist dabei derart eingestellt, daß sie die Verbindungslinie zwischen der Einlaufstelle und der Bandführung 21 in Richtung auf die Mittelachse 7 überragt, wie dies in Fig. 1 dargestellt ist.Between the belt guide 21 and the feed rollers 9 and 10 there is a bending roller 22 which can be rotated about an axis of rotation 23 perpendicular to the contact surface 2 and is arranged on the holder so as to be displaceable and fixable in the direction of the central axis 7. The bending roller 22 is set such that it projects beyond the connecting line between the entry point and the belt guide 21 in the direction of the central axis 7, as shown in FIG. 1.

Bei der Herstellung eines Rohres durch schraubenlinienförmiges Wickeln des Bandes 8 wird das Band zunächst in Richtung des mit 24 bezeichneten Pfeiles den Antriebsrollen 18 zugeführt, die es durch die Bandführung 21 und über die Biegerolle 22 dem Einlaufrollenpaar 9 und 10 der Wickeleinrichtung 3 zuführen. In der Wickeleinrichtung wird das Band 8 schraubenlinienförmig zu einem Rohr gewickelt, wobei die Einlaufrollen 9 und 10 die Verbindung des zulaufenden Bandes mit dem bereits gewickelten Rohr herstellen. Das gewickelte Rohr wird in Richtung des mit 25 bezeichneten Pfeiles aus der Wickeleinrichtung 3 abgezogen.In the manufacture of a tube by helically winding the band 8, the band is first fed in the direction of the arrow labeled 24 to the drive rollers 18, which feed it through the band guide 21 and via the bending roller 22 to the inlet roller pair 9 and 10 of the winding device 3. In the winding device, the band 8 is wound helically to form a tube, the feed rollers 9 and 10 establishing the connection of the incoming band with the tube that has already been wound. The wound tube is withdrawn from the winding device 3 in the direction of the arrow labeled 25.

Dadurch, daß die Umfangsgeschwindigkeit der inneren Einlaufrolle kleiner als die Umfangsgeschwindigkeit der äußeren Einlaufrolle ist, wird eine sichere Führung des Bandes zwischen den Einlaufrollen gewährleistet und das zu wickelnde Band fest an die Stützrollen 5 der Wickeleinrichtung 3 angedrückt, so daß das Band bzw. das Rohr sicher in der Wickeleinrichtung 3 gehalten wird und hohe Arbeitsgeschwindigkeiten möglich sind. Diese Wirkung wird noch dadurch verstärkt, daß die Umfangsgeschwindigkeit der Antriebsrollen 18 größer als die Umfangsgeschwindigkeit der äußeren Einlaufrolle 10 ist.Characterized in that the peripheral speed of the inner infeed roller is less than the peripheral speed of the outer infeed roller, a secure guiding of the tape between the infeed rollers is ensured and the tape to be wound is pressed firmly against the support rollers 5 of the winding device 3, so that the tape or the tube is held securely in the winding device 3 and high working speeds are possible. This effect is reinforced by the fact that the peripheral speed of the drive rollers 18 is greater than the peripheral speed of the outer feed roller 10.

Gleiches bewirkt auch die Drehung der Trägerplatte 4 um die Mittelachse 7 um den Winkel P , wodurch die dem Einlaufrollenpaar 9 und 10 folgende Stützrolle 5 etwas nach oben geneigt wird. Durch die Biegerolle 22 erfährt das zu wickelnde Band bereits eine geringe Vorbiegung, so daß die Biegearbeit in der Wickeleinrichtung verringert wird.The same effect is caused by the rotation of the carrier plate 4 about the central axis 7 by the angle P, as a result of which the support roller 5 following the inlet roller pair 9 and 10 is slightly inclined upwards. Due to the bending roller 22, the strip to be wound is already slightly pre-bent, so that the bending work in the winding device is reduced.

Als vorteilhaft hat es sich herausgestellt, daß der Schlupf zwischen den beiden Einlaufrollen bzw. zwischen der äußeren Einlaufrolle und den Antriebsrollen 0,2 bis 0,5 mm pro Umdrehung der inneren Einlaufrolle bzw. der Antriebsrollen beträgt. Als günstig wurde für den Schnittwinkel f ein Wert von 0,5 bis 1,50 gefunden. Die kreisringförmig ausgebildete Trägerplatte 4 ist an der Haltefläche 2 der Halterung 1 lösbar befestigt, so daß zur Herstellung eines Rohres mit einem anderen Durchmesser eine andere Wickeleinrichtung mit dem entsprechenden Durchmesser an der Halterung 1 befestigbar ist. Dadurch, daß die innere Einlaufrolle 9 einen sehr kleinen Durchmesser aufweist, wird nicht nur die Biegearbeit erleichtert, sondern ist es auch möglich, Rohre mit sehr kleinem Durchmesser herzustellen.It has proven to be advantageous that the slip between the two inlet rollers or between the outer inlet roller and the drive rollers is 0.2 to 0.5 mm per revolution of the inner inlet roller or the drive rollers. A value of 0.5 to 1.5 0 was found to be favorable for the cutting angle f. The ring-shaped carrier plate 4 is releasably attached to the holding surface 2 of the holder 1, so that another winding device with the corresponding diameter can be fastened to the holder 1 in order to produce a tube with a different diameter. The fact that the inner feed roller 9 has a very small diameter not only makes bending work easier, but it is also possible to produce tubes with a very small diameter.

Claims (10)

1. Vorrichtung zum Herstellen von Rohren durch schraubenlinienförmiges Wickeln eines vorzugsweise gewellten Bandes mit einer Wickeleinrichtung aus kreisförmig am Außenumfang des zu wickelnden Rohres angeordneten, frei drehbaren Stützrollen, deren zueinander und zur Längsachse des zu wickelnden Rohres parallele Drehachsen auf einer gemeinsamen Trägerplatte angeordnet sind, mit zwei an der Einlaufstelle des Bandes in die Wickeleinrichtung angeordneten, an den beiden Breitseiten des Bandes angreifenden, antreibbaren Einlaufrollen und mit zwei im Abstand vor dem Einlaufrollenpaar angeordneten, ebenfalls an den Breitseiten des Bandes angreifenden, antreibbaren Antriebsrollen, wobei die Trägerplatte derart angeordnet ist, daß die durch den Mittelpunkt des von den Stützrollen gebildeten Kreises und parallel zu den Drehachsen der Stützrollen verlaufende Mittelachse die durch die Drehachsen der Einlaufrollen bestimmte Ebene im Steigungswinkel des zu wickelnden Rohres schneidet, dadurch gekennzeichnet, daß die Umfangsgeschwindigkeit der innerhalb der Wickeleinrichtung (3) angeordneten, inneren Einlaufrolle (9) kleiner ist, als die Umfangsgeschwindigkeit der außerhalb der Wickeleinrichtung angeordneten, äußeren Einlaufrolle (10).1.Device for the production of tubes by helical winding of a preferably corrugated band with a winding device comprising circularly arranged, freely rotatable support rollers on the outer circumference of the tube to be wound, the axes of rotation of which are parallel to one another and to the longitudinal axis of the tube to be wound, are arranged on a common carrier plate two drivable feed rollers arranged at the entry point of the belt into the winding device, acting on the two broad sides of the belt, and with two drivable drive rollers arranged at a distance from the pair of feed rollers, also acting on the broad sides of the belt, the carrier plate being arranged such that the center axis of the circle formed by the support rollers and parallel to the axes of rotation of the support rollers and the axis determined by the axes of rotation of the infeed rollers intersects in the pitch angle of the tube to be wound, thereby marked inet that the peripheral speed of the inner inlet roller (9) arranged inside the winding device (3) is lower than the peripheral speed of the outer inlet roller (10) arranged outside the winding device. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die innere Einlaufrolle (9) einen kleineren Durchmesser als die äußere Einlaufrolle (10) aufweist.2. Device according to claim 1, characterized in that the inner inlet roller (9) has a smaller diameter than the outer inlet roller (10). 3. Vorrichtung nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß der Schlupf der inneren Einlaufrolle (9) in bezug zur äußeren Einlaufrolle (10) 0,2 bis 0,5 mm pro Umdrehung der inneren Einlaufrolle beträgt.3. Device according to one of claims 1 or 2, characterized in that the slip of the inner inlet roller (9) with respect to the outer inlet roller (10) is 0.2 to 0.5 mm per revolution of the inner inlet roller. 4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Trägerplatte (4) derart angeordnet ist, daß die Mittelachse (7) die durch die Drehachsen (11) der Einlaufrollen (9, 10) bestimmte Ebene (13) in der Schnittlinie dieser Ebene mit der durch die Mitte der Einlaufrollen und senkrecht zu den Drehachsen der Einlaufrollen verlaufenden Ebene (14) schneidet.4. Device according to one of claims 1 to 3, characterized in that the carrier plate (4) is arranged such that the central axis (7) through the axes of rotation (11) of the inlet rollers (9, 10) determined plane (13) in intersects the line of intersection of this plane with the plane (14) running through the center of the inlet rollers and perpendicular to the axes of rotation of the inlet rollers. 5. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Trägerplatte (4) eine zur Mittelachse (7) in einem Winkel von 90° vermehrt um den Steigungswinkel (&) des zu wickelnden Rohres geneigt verlaufende Anlagefläche (12) aufweist, die an einer zu den Drehachsen der Einlaufrollen (9, 10) senkrechten Haltefläche (2) anliegt, daß die Trägerplatte in Wickelrichtung (15) des Bandes (8) um die Mittelachse (7) derart gedreht angeordnet ist, daß die Schnittlinie (16) der Ebene der Anlagefläche mit einer zur Mittelachse senkrechten Ebene (17) die durch die Drehachsen (11) der Einlaufrollen (9, 10) verlaufende Ebene (13) in einem spitzen Schnittwinkel (β) schneidet.5. Device according to one of claims 1 to 4, characterized in that the carrier plate (4) to the central axis (7) at an angle of 90 ° increased by the pitch angle (&) of the pipe to be wound has an inclined contact surface (12) , which rests on a holding surface (2) perpendicular to the axes of rotation of the inlet rollers (9, 10), that the carrier plate is wound Direction (15) of the belt (8) is arranged rotated about the central axis (7) such that the section line (16) of the plane of the contact surface with a plane (17) perpendicular to the central axis through the axes of rotation (11) of the inlet rollers (9 , 10) intersecting plane (13) at an acute cutting angle (β). 6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß der Schnittwinkel (p) 0,5 bis 1,50 beträgt.6. The device according to claim 5, characterized in that the cutting angle ( p ) is 0.5 to 1.5 0 . 7. Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Trägerplatte (4) kreisringförmig ausgebildet ist und an der Haltefläche (2) lösbar befestigt ist.7. Device according to one of claims 1 to 6, characterized in that the carrier plate (4) is annular and is releasably attached to the holding surface (2). 8. Vorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß zwischen Einlaufrollen (9, 10) und Antriebsrollen (18) eine Bandführung (4) angeordnet ist.8. Device according to one of claims 1 to 7, characterized in that a belt guide (4) is arranged between the inlet rollers (9, 10) and drive rollers (18). 9. Vorrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die Umfangsgeschwindigkeit der Antriebsrollen (18) größer als die Umfangsgeschwindigkeit der äußeren Einlaufrolle (10) ist und daß der Schlupf der Antriebsrollen zu der äußeren Einlaufrolle (10) 0,2 bis 0,5 mm pro Umdrehung der Antriebsrollen beträgt.9. Device according to one of claims 1 to 8, characterized in that the peripheral speed of the drive rollers (18) is greater than the peripheral speed of the outer feed roller (10) and that the slip of the drive rollers to the outer feed roller (10) 0.2 to 0.5 mm per revolution of the drive rollers. 10. Vorrichtung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß zwischen Bandführung (21) und Einlaufrollen (9, 19) eine Biegerolle (22) angeordnet ist, die die Verbindungslinie zwischen der Einlaufstelle und der Bandführung in Richtung auf die Mittelachse (7) der Wickeleinrichtung (9) überragt, daß die Biegerolle (22) um eine zu den Drehachsen (11) der Einlaufrollen (9, 10) parallele Drehachse (23) drehbar ist und daß die Biegerolle (22) in Richtung zur Mittelachse (7) verschiebbar und festlegbar angeordnet ist.10. Device according to one of claims 1 to 9, characterized in that a bending roller (22) is arranged between the belt guide (21) and inlet rollers (9, 19), which the connecting line between the inlet point and the belt guide in the direction of the central axis ( 7) of the winding device (9) protrudes that the bending roller (22) can be rotated about an axis of rotation (23) parallel to the axes of rotation (11) of the inlet rollers (9, 10) and that the bending roller (22) in the direction of the central axis (7 ) is slidably and securely arranged.
EP80105664A 1980-06-16 1980-09-20 Device for the production of tubes by helically winding a preferably corrugated strip Expired EP0042011B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80105664T ATE7464T1 (en) 1980-06-16 1980-09-20 DEVICE FOR PRODUCTION OF PIPES BY HELICAL WINDING OF A PREFERABLY CORRUGATED STRIP.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3022575 1980-06-16
DE19803022575 DE3022575C3 (en) 1980-06-16 1980-06-16 Device for producing pipes by helically winding a preferably corrugated strip

Publications (3)

Publication Number Publication Date
EP0042011A2 true EP0042011A2 (en) 1981-12-23
EP0042011A3 EP0042011A3 (en) 1982-04-14
EP0042011B1 EP0042011B1 (en) 1984-05-16

Family

ID=6104763

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80105664A Expired EP0042011B1 (en) 1980-06-16 1980-09-20 Device for the production of tubes by helically winding a preferably corrugated strip

Country Status (2)

Country Link
EP (1) EP0042011B1 (en)
AT (1) ATE7464T1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0222285A3 (en) * 1985-11-13 1989-03-22 Fritz Hahn Kg Method and apparatus for making a corrugated tube by helically winding a thin corrugated strip, preferably a steel strip
US8955362B2 (en) 2005-12-23 2015-02-17 Iti Scotland Limited Apparatus for and method of manufacturing helically wound structures

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1602342A1 (en) * 1967-05-11 1971-08-26 Protol S A Tube with a screw-shaped seam
DE2154438C3 (en) * 1971-11-02 1980-12-18 Institut Elektrosvarki Imeni E.O. Patona Akademii Nauk Ukrainskoj Ssr, Kiew (Sowjetunion) Seam pipe mill
DE2754483C2 (en) * 1976-12-23 1982-11-18 Emil 6603 Sulzbach Siegwart Device for the production of spiral tubes

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0222285A3 (en) * 1985-11-13 1989-03-22 Fritz Hahn Kg Method and apparatus for making a corrugated tube by helically winding a thin corrugated strip, preferably a steel strip
US8955362B2 (en) 2005-12-23 2015-02-17 Iti Scotland Limited Apparatus for and method of manufacturing helically wound structures

Also Published As

Publication number Publication date
ATE7464T1 (en) 1984-06-15
EP0042011A3 (en) 1982-04-14
EP0042011B1 (en) 1984-05-16

Similar Documents

Publication Publication Date Title
DE2637454A1 (en) PROCESS FOR BENDING TWO EARTH PLUGGED PIPES AND DEVICE FOR CARRYING OUT THE PROCESS
DE1910549B2 (en) Continuously working wedge cross rolling device
DE2049235C3 (en) Device for the production of helically corrugated tubes
DE2803365C3 (en) Method and device for the production of helical transverse ribs on a pipe by rolling
DE1900741B2 (en) Device for shaping conical metal tubes
DE3636707C2 (en)
DE1075530B (en) Device for the production of pipes with a helical weld seam
DE2210055C3 (en) Method of joining adjacent edges of metal sheets by folding
EP0042011A2 (en) Device for the production of tubes by helically winding a preferably corrugated strip
DE3022575C2 (en)
DD205830A5 (en) DEVICE FOR WAVING PIPES
DE69203826T2 (en) Improvements in or related to winding coils.
EP0182003A2 (en) Cross-roll straightening machine with more than two straightening rolls
DE2927145C2 (en) Device for bending pipes
DE3431120C2 (en) Method and device for corrugating metal pipes
DE3441565A1 (en) METHOD AND DEVICE FOR PRODUCING A FLEXIBLE CORRUGATED TUBE AND FLEXIBLE CORRUGATED PIPE PRODUCED BY THE METHOD
CH651229A5 (en) MACHINE FOR PRODUCING SCREW-WINDED TUBE TUBES.
DE3940846C1 (en)
AT316283B (en) Method and device for producing pipes
DE2602983C2 (en) Method and device for the production of tubes by helically winding a tape
DE4124618C2 (en) Device for the production of welded profile tubes
DE1964591C3 (en) Folding rollers of a device for the production of spiral ducts
DE2360477A1 (en) Sheet metal spiral coil for tubular heat exchanger - is produced and installed on continuous cycle processing machine
DE633137C (en) Device for the helical winding of ribs on tubes
DE2020915C3 (en) Straightening machine for pipes

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): AT BE CH FR GB IT LU NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

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

17P Request for examination filed

Effective date: 19820423

R17P Request for examination filed (corrected)

Effective date: 19820423

ITF It: translation for a ep patent filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

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

REF Corresponds to:

Ref document number: 7464

Country of ref document: AT

Date of ref document: 19840615

Kind code of ref document: T

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
ITTA It: last paid annual fee
EPTA Lu: last paid annual fee
EAL Se: european patent in force in sweden

Ref document number: 80105664.9

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

Ref country code: GB

Payment date: 19980817

Year of fee payment: 19

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

Ref country code: LU

Payment date: 19980820

Year of fee payment: 19

Ref country code: BE

Payment date: 19980820

Year of fee payment: 19

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

Ref country code: SE

Payment date: 19980821

Year of fee payment: 19

Ref country code: NL

Payment date: 19980821

Year of fee payment: 19

Ref country code: FR

Payment date: 19980821

Year of fee payment: 19

Ref country code: CH

Payment date: 19980821

Year of fee payment: 19

Ref country code: AT

Payment date: 19980821

Year of fee payment: 19

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: 19990920

Ref country code: GB

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

Effective date: 19990920

Ref country code: AT

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

Effective date: 19990920

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

Ref country code: SE

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19990929

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: 19990930

Ref country code: CH

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

Effective date: 19990930

Ref country code: BE

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

Effective date: 19990930

BERE Be: lapsed

Owner name: FRITZ HAHN K.G.

Effective date: 19990930

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: 20000401

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

Effective date: 19990920

EUG Se: european patent has lapsed

Ref document number: 80105664.9

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

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

Effective date: 20000531

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20000401

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST