EP0309945A2 - Device for applying a descaling agent to the inner surface of a loop - Google Patents

Device for applying a descaling agent to the inner surface of a loop Download PDF

Info

Publication number
EP0309945A2
EP0309945A2 EP88115722A EP88115722A EP0309945A2 EP 0309945 A2 EP0309945 A2 EP 0309945A2 EP 88115722 A EP88115722 A EP 88115722A EP 88115722 A EP88115722 A EP 88115722A EP 0309945 A2 EP0309945 A2 EP 0309945A2
Authority
EP
European Patent Office
Prior art keywords
passage
swirl
carrier gas
descaling agent
applying
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
EP88115722A
Other languages
German (de)
French (fr)
Other versions
EP0309945A3 (en
EP0309945B1 (en
Inventor
Hansjörg Furrer
Norbert Richle
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.)
Lonza AG
Original Assignee
Lonza AG
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 Lonza AG filed Critical Lonza AG
Priority to AT88115722T priority Critical patent/ATE76335T1/en
Publication of EP0309945A2 publication Critical patent/EP0309945A2/en
Publication of EP0309945A3 publication Critical patent/EP0309945A3/en
Application granted granted Critical
Publication of EP0309945B1 publication Critical patent/EP0309945B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G3/00—Apparatus for cleaning or pickling metallic material
    • C23G3/04—Apparatus for cleaning or pickling metallic material for cleaning pipes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00—Abrasive blasting machines or devices; Plants
    • B24C3/32—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks
    • B24C3/325—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks for internal surfaces, e.g. of tubes
    • B24C3/327—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks for internal surfaces, e.g. of tubes by an axially-moving flow of abrasive particles without passing a blast gun, impeller or the like along the internal surface

Definitions

  • the invention relates to a device for applying a descaling agent to the inner surface of a glowing billet in the manufacture of seamless tubes and to a method in which the device is used.
  • a method for descaling the inner surface of glowing blanks in the manufacture of seamless tubes and a device for carrying out this method are known (EP-A-0 133 937).
  • the carrier gas stream loaded with the substance namely a descaling agent
  • the swirl is conducted with the swirl directly through the hollow body, namely the glowing cap.
  • the swirl brings a more even distribution of the substance in the carrier gas and the centrifugal force that occurs as a result of the swirl brings a larger part of the substance onto the inner surface of the hollow body without following gravity.
  • the loaded carrier gas stream with the swirl must first force the air at rest in the cavity through and out of the cavity. Part of its swirl is transferred to this air and is lost for the application of the substance to the inner surface of the hollow body.
  • the loaded carrier gas stream flows through the cavity, its velocity and swirl are less near the inner surface than in the center of the cavity cross section.
  • the current becomes lami nar because of the friction on the inner surface, especially if it is rough, for example in the case of a loophole, covered with a layer of scale.
  • only part of the swirl imparted to the loaded carrier gas stream is effective for applying the substance to the inner surface.
  • the invention seeks to remedy this.
  • the invention as characterized in the claims, solves the problem of improving the method and, above all, the device of the type mentioned, to a larger part of the substance with which the carrier gas stream to which the swirl was given is loaded to bring the inner surface of the hollow body.
  • twist is to be understood in the sense of a screwing movement or a helical movement.
  • the advantages achieved by the invention are essentially to be seen in the fact that the loaded carrier gas stream with the swirl when entering the cavity does not encounter still air, but rather the additional, unloaded gas stream which is in the same direction and with a swirl of the same direction of rotation how the laden carrier gas stream is already flowing through the cavity.
  • the loaded carrier stream acts immediately at full speed and with all the twist given to it for applying the substance to the inner surface, from one end of the cavity to the other.
  • Air is preferably used as the carrier gas and as an additional gas.
  • the descaling agent can be in powder or granular form.
  • compositions can be used as descaling agents, but preference is given to those which, inter alia, are used. are listed in European application 0 169 413.
  • the gas flow leaving the void containing the carrier gas and the additional gas as well as a remainder of the substance can be supported by conventional means to support the flow in the void Devices are suctioned off, the rest of the material, if it consists of fine particles, can be collected in a separator for further use or recirculation.
  • the invention is explained in more detail below with the aid of a drawing which represents only one embodiment.
  • the single figure shows a perspective view of a partially sectioned device for carrying out the method for applying a descaling agent to the inner surface of a plate, the cavity of which is largely cylindrical.
  • An essential part in connection with the invention is a passage element 1 for a carrier gas stream loaded with the substance.
  • This passage member 1 can be designed as a cylinder or as a passage with a square or rectangular cross section.
  • the cylindrical shape is advantageously used.
  • Baffles 3 are arranged in the passage space 2 of the passage member 1 and form a swirl generator for the loaded carrier gas stream.
  • part of the guide plates 3 is designed as a feed device 4, in the drawing as nozzles 4, for an additional gas not loaded with the substance. Their outflow directions are at the same angle to the guide plate 3, based on the axis 6. This ensures that the gas is given a swirl. The direction of rotation is irrelevant to the effect of the application.
  • an intermediate space 12 which is open on the circumference, e.g. 15 to 35 mm, preferably 20 mm in length, as a result of which the effect known in jet apparatus (jet pumps, atomizers) is achieved, which leads to a better distribution of the substance in the carrier gas stream leaving the passage element.
  • jet apparatus jet pumps, atomizers
  • an annular space with gas supply which is closed to the outside and surrounds the intermediate space can be provided.
  • Lines 13 leading to the nozzles 4 run along the passage member 1 and are provided via a connection 15 for the supply of the additional gas.
  • the angle of the cone 18, measured in relation to the axis 6, is expediently chosen between 20 and 50 °.
  • the angle is preferably 40 °.
  • the guide plates 3 are straight or slightly curved, at an angle, measured at the end of the guide plate, from 15 to 25 ° to the axis 6, preferably from 20 ° to the axis 6.
  • the nozzles 4 also have the function of baffles 3. That is, some of the baffles 3 are designed as nozzles 4. Their angle to the axis consequently corresponds to that of the guide plates 3. Three to six guide plates 3, preferably four guide plates 3, are expediently arranged in a passage element 1.
  • Two to three of these guide plates 3, preferably two of the guide plates 3, are designed as nozzles 4.
  • the nozzles 4, viewed from the cross section of the passage element 1, are advantageously arranged opposite one another.
  • the device according to the invention is expediently used for amounts of 100 to 1,000 g of descaling agent.
  • passage elements 1 and their components can be varied in size.
  • the inner surface of glowing blanks is advantageously descaled for the production of seamless, 4 to 12 meter long tubes with an inside diameter of 10 to 40 cm.
  • the procedure is such that the device is brought to the bracket via a displacement unit with the aid of the centering device 8, which engages in the bracket, and a spring device 9. Then air not loaded with the descaling agent is blown through the nozzles 4 into the slugs at a pressure of appropriately 2 to 6 bar. This creates two helical, axially offset flows of this air in the cavity. At the same time or immediately afterwards, the air flow loaded with descaling agent begins. This is correspondingly a swirl in passage organ 1 through the baffles 3 granted.
  • the pressure of the loaded air flow also suitably ranges between 2 and 6 bar.
  • the gas supply is cut off, the displacement unit is withdrawn and the system is ready to descaled the next blow.

Abstract

The invention relates to a device for applying a descaling agent to the inner surface of a red-hot hollow blank in the production of seamless tubes.

Description

Die Erfindung bezieht sich auf eine Einrichtung zum Aufbringen eines Entzunderungsmittels auf die Innenfläche einer glühenden Luppe bei der Herstellung von nahtlosen Rohren sowie auf ein Verfahren, in welchem die Einrichtung angewendet wird.The invention relates to a device for applying a descaling agent to the inner surface of a glowing billet in the manufacture of seamless tubes and to a method in which the device is used.

Es ist ein Verfahren zum Entzundern der Innenfläche glühender Luppen bei der Herstellung nahtloser Rohre und eine Einrich­tung zur Durchführung dieses Verfahrens bekannt (EP-A-­0 133 937). Bei diesem Verfahren und mit dieser Einrichtung wird der mit dem Stoff, nämlich einem Entzunderungsmittel, beladene Trägergasstrom mit dem Drall unmittelbar durch den Hohlkörper, nämlich die glühende Luppe, geleitet. Dabei wird durch den Drall eine gleichmässigere Verteilung des Stoffes im Trägergas und durch die infolge des Dralls auftretende Flieh­kraft ein grösserer Teil des Stoffes auf die Innenfläche des Hohlkörpers gebracht, ohne der Schwerkraft zu folgen.A method for descaling the inner surface of glowing blanks in the manufacture of seamless tubes and a device for carrying out this method are known (EP-A-0 133 937). In this method and with this device, the carrier gas stream loaded with the substance, namely a descaling agent, is conducted with the swirl directly through the hollow body, namely the glowing cap. The swirl brings a more even distribution of the substance in the carrier gas and the centrifugal force that occurs as a result of the swirl brings a larger part of the substance onto the inner surface of the hollow body without following gravity.

Der beladene Trägergasstrom mit dem Drall muss zuerst die im Hohlraum ruhende Luft durch den Hohlraum hindurch und aus die­sem heraus drängen. Dabei wird ein Teil seines Dralls an diese Luft übertragen und geht für das Aufbringen des Stoffes auf die Innenfläche des Hohlkörpers verloren. Wenn der beladene Trägergasstrom durch den Hohlraum strömt, sind seine Geschwin­digkeit und sein Drall in der Nähe der Innenfläche kleiner als in der Mitte des Hohlraumquerschnitts. Die Strömung wird lami­ nar wegen der Reibung an der Innenfläche, besonders wenn diese rauh, z.B. im Falle einer Luppe, mit einer Zunderschicht über­zogen ist. Insgesamt ist nur ein Teil des dem beladenen Trä­gergasstrom erteilten Dralls zum Aufbringen des Stoffes auf die Innenfläche wirksam.The loaded carrier gas stream with the swirl must first force the air at rest in the cavity through and out of the cavity. Part of its swirl is transferred to this air and is lost for the application of the substance to the inner surface of the hollow body. When the loaded carrier gas stream flows through the cavity, its velocity and swirl are less near the inner surface than in the center of the cavity cross section. The current becomes lami nar because of the friction on the inner surface, especially if it is rough, for example in the case of a loophole, covered with a layer of scale. Overall, only part of the swirl imparted to the loaded carrier gas stream is effective for applying the substance to the inner surface.

Hier will die Erfindung Abhilfe schaffen. Die Erfindung, wie sie in den Patentansprüchen gekennzeichnet ist, löst die Auf­gabe, das Verfahren und vor allem die Einrichtung der genann­ten Art zu verbessern, um einen grösseren Teil des Stoffes, mit dem der Trägergasstrom, dem der Drall erteilt wurde, bela­den ist, auf die Innenfläche des Hohlkörpers zu bringen. Dabei ist Drall im Sinne einer Schraubbewegung oder schraubenlinien­förmigen Bewegung zu verstehen.The invention seeks to remedy this. The invention, as characterized in the claims, solves the problem of improving the method and, above all, the device of the type mentioned, to a larger part of the substance with which the carrier gas stream to which the swirl was given is loaded to bring the inner surface of the hollow body. Here, twist is to be understood in the sense of a screwing movement or a helical movement.

Die durch die Erfindung erzielten Vorteile sind im wesentli­chen darin zu sehen, dass der beladene Trägergasstrom mit dem Drall beim Eindringen in den Hohlraum nicht auf ruhende Luft trifft, sondern auf den zusätzlichen, nicht beladenen Gas­strom, der in derselben Richtung und mit einem Drall desselben Drehsinnes wie der beladene Trägergasstrom bereits durch den Hohlraum fliesst. Dadurch wirkt der beladene Trägerstrom so­fort mit seiner ganzen Geschwindigkeit und dem ganzen ihm er­teilten Drall für das Aufbringen des Stoffes auf die Innenflä­che, von einem Hohlraumende zum anderen. Wenn der zusätzliche Gasstrom während wenigstens eines Teiles der Dauer des belade­nen Trägergasstromes fortgesetzt wird, kann während dieser Zeit der durch Reibung des beladenen Trägergasstromes an der Innenfläche verursachte Geschwindigkeits- und Drallverlust durch die Wirkung des zusätzlichen Gasstromes aufgehoben wer­den, so dass insgesamt ein Drall zur Wirkung kommt, der dem dem Trägergasstrom erteilten Drall je nach Geschwindigkeit und Drall des zusätzlichen Gasstromes gleich, aber auch grösser (oder auch kleiner) sein kann als jener. Indem der zusätzliche Gasstrom an einer oder in Teilströmen an mehreren gleichmässig verteilten Stellen des Umfangs des Hohlraums in diesen gelei­tet wird, kann erreicht werden, dass der zusätzliche Gasstrom nur nahe der Innenfläche des Hohlraumes wirkt. Insgesamt wird die Wirksamkeit des bekannten Verfahrens bzw. der bekannten Vorrichtung durch die Erfindung erheblich verbessert. Weitere Vorteile und vorteilhafte Ausführungen der Erfindung gehen aus der weiter unten folgenden Beschreibung eines Ausführungsweges der Erfindung hervor.The advantages achieved by the invention are essentially to be seen in the fact that the loaded carrier gas stream with the swirl when entering the cavity does not encounter still air, but rather the additional, unloaded gas stream which is in the same direction and with a swirl of the same direction of rotation how the laden carrier gas stream is already flowing through the cavity. As a result, the loaded carrier stream acts immediately at full speed and with all the twist given to it for applying the substance to the inner surface, from one end of the cavity to the other. If the additional gas flow is continued for at least a part of the duration of the loaded carrier gas stream, during this time the friction of the loaded carrier gas stream on the The loss of speed and swirl caused by the inner surface are canceled out by the effect of the additional gas flow, so that overall a swirl comes into effect which, depending on the speed and swirl of the additional gas flow, can be the same, but also larger (or smaller) depending on the speed and swirl of the additional gas flow than that. By guiding the additional gas flow at one or in partial flows at several evenly distributed locations on the circumference of the cavity, it can be achieved that the additional gas flow acts only near the inner surface of the cavity. Overall, the effectiveness of the known method or the known device is considerably improved by the invention. Further advantages and advantageous embodiments of the invention will become apparent from the description of an embodiment of the invention which follows below.

Vorzugsweise wird als Trägergas sowie als zusätzliches Gas Luft eingesetzt. Das Entzunderungsmittel kann pulver- oder granulatförmig vorliegen.Air is preferably used as the carrier gas and as an additional gas. The descaling agent can be in powder or granular form.

Als Entzunderungsmittel können alle bekannten Zusammensetzun­gen eingesetzt werden, bevorzugt werden aber solche eingese­tzt, wie sie u.a. in der europäischen Anmeldung 0 169 413 auf­geführt sind.All known compositions can be used as descaling agents, but preference is given to those which, inter alia, are used. are listed in European application 0 169 413.

Die die Luppe verlassende, das Trägergas und das zusätzlich Gas sowie einen Rest des Stoffes enthaltende Gasströmung kann zur Unterstützung der Strömung in der Luppe mittels üblichen Vorrichtungen abgesaugt werden, wobei der Rest des Stoffes, wenn dieser aus feinen Partikeln besteht, in einem Abscheider zwecks weiterer Verwendung bzw. Rezirkulierung gesammelt wer­den kann.The gas flow leaving the void containing the carrier gas and the additional gas as well as a remainder of the substance can be supported by conventional means to support the flow in the void Devices are suctioned off, the rest of the material, if it consists of fine particles, can be collected in a separator for further use or recirculation.

Im folgenden wird die Erfindung anhand einer nur einen Ausfüh­rungsweg darstellenden Zeichnung näher erläutert. Die einzige Figur zeigt eine perspektivische Ansicht einer teils geschnit­tenen Einrichtung zur Durchführung des Verfahrens zum Aufbrin­gen eines Entzunderungsmittels auf die Innenfläche einer Lup­pe, deren Hohlraum weitgehend zylindrisch ist.The invention is explained in more detail below with the aid of a drawing which represents only one embodiment. The single figure shows a perspective view of a partially sectioned device for carrying out the method for applying a descaling agent to the inner surface of a plate, the cavity of which is largely cylindrical.

Im Zusammenhang mit der Erfindung wesentlicher Teil ist ein Durchlassorgan 1 für einen mit dem Stoff beladenen Trägergas­strom. Dieses Durchlassorgan 1 kann als Zylinder oder als Durchlass mit quadratischem oder rechteckigem Querschnitt aus­gebildet sein. Vorteilhaft wird die Zylinderform eingesetzt. Im Durchlassraum 2 des Durchlassorgans 1 sind Leitbleche 3 angeordnet, die einen Drallgeber für den beladenen Trägergas­strom bilden. Erfindungsgemäss ist ein Teil der Leitbleche 3 als Zufuhrvorrichtung 4, in der Zeichnung als Düsen 4, für ein zusätzliches, nicht mit dem Stoff beladenen Gas ausgebildet. Deren Ausströmrichtungen sind gleichwinklig zum Leitblech 3, bezogen auf die Achse 6. Damit wird erreicht, dass dem Gas ein Drall erteilt wird. Die Drehrichtung ist dabei unerheblich für die Wirkung der Aufbringung.An essential part in connection with the invention is a passage element 1 for a carrier gas stream loaded with the substance. This passage member 1 can be designed as a cylinder or as a passage with a square or rectangular cross section. The cylindrical shape is advantageously used. Baffles 3 are arranged in the passage space 2 of the passage member 1 and form a swirl generator for the loaded carrier gas stream. According to the invention, part of the guide plates 3 is designed as a feed device 4, in the drawing as nozzles 4, for an additional gas not loaded with the substance. Their outflow directions are at the same angle to the guide plate 3, based on the axis 6. This ensures that the gas is given a swirl. The direction of rotation is irrelevant to the effect of the application.

Zwischen dem Ende des Mundstücks 16 der Zuleitung 7 und dem Anfang des Verdrängerkörpers 18 ist ein am Umfang offener Zwi­schenraum 12 von z.B. 15 bis 35 mm, vorzugsweise 20 mm Länge, wodurch der bei Strahlapparaten (Strahlpumpen, Zerstäubern) bekannte Effekt erzielt wird, der zu einer besseren Verteilung des Stoffes im das Durchlassorgan verlassenden Trägergasstrom führt. Wenn der Zutritt von Luft zum beladenen Trägergasstrom unerwünscht ist, kann ein nach aussen geschlossener, den Zwi­schenraum umschliessender Ringraum mit Gaszufuhr vorgesehen werden. Längs des Durchlassorgans 1 verlaufen zu den Düsen 4 führende Leitungen 13, die über einen Anschluss 15 für die Zu­fuhr des zusätzlichen Gases vorgesehen sind.Between the end of the mouthpiece 16 of the feed line 7 and the beginning of the displacer 18 there is an intermediate space 12 which is open on the circumference, e.g. 15 to 35 mm, preferably 20 mm in length, as a result of which the effect known in jet apparatus (jet pumps, atomizers) is achieved, which leads to a better distribution of the substance in the carrier gas stream leaving the passage element. If the access of air to the laden carrier gas stream is undesirable, an annular space with gas supply which is closed to the outside and surrounds the intermediate space can be provided. Lines 13 leading to the nozzles 4 run along the passage member 1 and are provided via a connection 15 for the supply of the additional gas.

Im Durchlassraum 2 ist ein in Strömungsrichtung konisch erwei­terter Verdrängerkörper 18 angeordnet. Um eine vorteilhafte Wirkung zu erzielen, wird der Winkel des Konusses 18, gemessen zur Achse 6, zweckmässig zwischen 20 und 50° gewählt. Der Win­kel beträgt vorzugsweise 40°.A displacement body 18, which is flared in the direction of flow, is arranged in the passage space 2. In order to achieve an advantageous effect, the angle of the cone 18, measured in relation to the axis 6, is expediently chosen between 20 and 50 °. The angle is preferably 40 °.

Die Leitbleche 3 sind gerade oder leicht gewölbt, in einem Winkel, gemessen am Leitblechende, von 15 bis 25° zur Achse 6, vorzugsweise von 20° zur Achse 6, angeordnet.The guide plates 3 are straight or slightly curved, at an angle, measured at the end of the guide plate, from 15 to 25 ° to the axis 6, preferably from 20 ° to the axis 6.

Die Düsen 4 haben ebenfalls die Funktion von Leitblechen 3. D.h. ein Teil der Leitbleche 3 sind als Düsen 4 ausgebildet. Deren Winkel zur Achse entspricht folglich dem der Leitbleche 3. Zweckmässig werden in einem Durchlassorgan 1 drei bis sechs Leitbleche 3, vorzugsweise vier Leitbleche 3, angeordnet.The nozzles 4 also have the function of baffles 3. That is, some of the baffles 3 are designed as nozzles 4. Their angle to the axis consequently corresponds to that of the guide plates 3. Three to six guide plates 3, preferably four guide plates 3, are expediently arranged in a passage element 1.

Zwei bis drei dieser Leitbleche 3, vorzugsweise zwei der Leit­bleche 3, sind als Düsen 4 ausgebildet. Vorteilhaft werden die Düsen 4, vom Querschnitt des Durchlassorgans 1 her betrachtet, gegenüberliegend angeordnet.Two to three of these guide plates 3, preferably two of the guide plates 3, are designed as nozzles 4. The nozzles 4, viewed from the cross section of the passage element 1, are advantageously arranged opposite one another.

Die erfindungsgemässe Einrichtung wird zweckmässig für Mengen von 100 bis 1.000 g an Entzunderungsmittel eingesetzt.The device according to the invention is expediently used for amounts of 100 to 1,000 g of descaling agent.

Zur Anpassung an Luppen verschiedener Durchmesser sind Durch­lassorgane 1 sowie deren Bestandteile in der Grösse variier­bar.In order to adapt to loops of different diameters, passage elements 1 and their components can be varied in size.

Mit der erfindungsgemässen Einrichtung wird vorteilhaft die Innenfläche glühender Luppen für die Herstellung nahtloser, 4 bis 12 Meter langer Rohre, mit einem Innendurchmesser von 10 bis 40 cm entzundert.With the device according to the invention, the inner surface of glowing blanks is advantageously descaled for the production of seamless, 4 to 12 meter long tubes with an inside diameter of 10 to 40 cm.

In der Regel wird so vorgegangen, dass die Einrichtung über eine Verschiebeeinheit mit Hilfe der Zentriereinrichtung 8, die in die Luppe greift, und einer Federvorrichtung 9 an die Luppe herangeführt wird.
Dann wird nicht mit dem Entzunderungsmittel beladene Luft mit einem Druck von zweckmässig 2 bis 6 bar durch die Düsen 4 in die Luppen geblasen. Dabei entstehen zwei schraubenlinienför­mige, axial gegeneinander versetzte Strömungen dieser Luft im Hohlraum. Gleichzeitig oder unmittelbar danach setzt der mit Entzunderungsmittel beladene Luftstrom ein. Diesem wird ent­sprechend in Durchlassorgan 1 durch die Leitbleche 3 ein Drall erteilt. Der Druck des beladenen Luftstroms bewegt sich zweck­mässig ebenfalls zwischen 2 und 6 bar.As a rule, the procedure is such that the device is brought to the bracket via a displacement unit with the aid of the centering device 8, which engages in the bracket, and a spring device 9.
Then air not loaded with the descaling agent is blown through the nozzles 4 into the slugs at a pressure of appropriately 2 to 6 bar. This creates two helical, axially offset flows of this air in the cavity. At the same time or immediately afterwards, the air flow loaded with descaling agent begins. This is correspondingly a swirl in passage organ 1 through the baffles 3 granted. The pressure of the loaded air flow also suitably ranges between 2 and 6 bar.

Nachdem die mit dem Entzunderungsmittel beladene Luftmenge durch die Luppe geströmt ist, wird die Gaszufuhr unterbrochen, die Verschiebeeinheit wird zurückgezogen und das System ist bereit, die nächste Luppe zu entzundern.After the amount of air loaded with the descaling agent has flowed through the blow, the gas supply is cut off, the displacement unit is withdrawn and the system is ready to descaled the next blow.

Claims (6)

1. Einrichtung zum Aufbringen eines Entzunderungsmittels auf die Innenfläche einer glühenden Luppe bei der Herstellung von nahtlosen Rohren mit einem Durchlassorgan (1) für den mit dem Stoff beladenen Trägergasstrom, in dessen Durch­lassraum (2) ein Drallgeber angeordnet ist, dadurch ge­kennzeichnet, dass der Drallgeber als winklig zur Achse (6) angeordnete gerade oder gewölbte Leitbleche (3) ausge­führt ist, wobei ein Teil der Leitbleche (3) als Vorrich­tung zur Zufuhr eines zusätzlichen Gases zum Trägergas (4) ausgebildet ist.1. Device for applying a descaling agent to the inner surface of a glowing bob in the manufacture of seamless tubes with a passage element (1) for the carrier gas stream loaded with the substance, in the passage space (2) of which a swirl sensor is arranged, characterized in that the swirl sensor is designed as a straight or curved baffle plate (3) arranged at an angle to the axis (6), part of the baffle plates (3) being designed as a device for supplying an additional gas to the carrier gas (4). 2. Einrichtung nach Patentanspruch 1, dadurch gekennzeichnet, dass die Leitbleche (3) in einem Winkel von 15 bis 25° zur Achse (6) angeordnet sind.2. Device according to claim 1, characterized in that the guide plates (3) are arranged at an angle of 15 to 25 ° to the axis (6). 3. Einrichtung nach Patentansprüchen 1 und 2, dadurch gekenn­zeichnet, dass die Vorrichtung zur Zufuhr eines zusätzli­chen Gases als Düse (4) ausgebildet ist.3. Device according to claims 1 and 2, characterized in that the device for supplying an additional gas is designed as a nozzle (4). 4. Einrichtung nach Patentansprüchen 1 bis 3, dadurch gekenn­zeichnet, dass im Durchlassraum (2) des Durchlassorgans (1) ein in der Durchlassvorrichtung konisch erweiterter Verdrängerkörper (18) angeordnet ist.4. Device according to claims 1 to 3, characterized in that in the passage space (2) of the passage member (1) in the passage device a conically expanded displacer (18) is arranged. 5. Einrichtung nach Patentansprüchen 1 bis 4, dadurch gekenn­zeichnet, dass an das Durchlassorgan (1) eine Zentriervor­ richtung (8) angebracht ist, um als in die Luppe greifen­des Zentriermittel zum Zentrieren des Druchlassorgans (1) in bezug auf die Luppe zu dienen.5. Device according to claims 1 to 4, characterized in that a centering on the passage member (1) direction (8) is attached to serve as a centering means which engages in the cap for centering the passage member (1) with respect to the cap. 6. Verfahren zum Aufbringen eines Entzunderungsmittels auf die Innenfläche einer glühenden Luppe, bei dem ein mit Stoff beladener Trägergasstrom nach einer Drallerteilung axial durch die Luppe geleitet wird, dadurch gekennzeich­net, dass zum Aufbringen des Entzunderungsmittels eine Einrichtung gemäss Patentansprüchen 1 bis 5 verwendet wird.6. A method for applying a descaling agent to the inner surface of a glowing bob, in which a carrier gas stream laden with material is passed axially through the bobbin after a swirl has been imparted, characterized in that a device according to patent claims 1 to 5 is used to apply the descaling agent.
EP88115722A 1987-09-29 1988-09-23 Device for applying a descaling agent to the inner surface of a loop Expired - Lifetime EP0309945B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88115722T ATE76335T1 (en) 1987-09-29 1988-09-23 DEVICE FOR APPLYING A DESCALING AGENT TO THE INTERIOR SURFACE OF A LOUPE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3777/87A CH674164A5 (en) 1987-09-29 1987-09-29
CH3777/87 1987-09-29

Publications (3)

Publication Number Publication Date
EP0309945A2 true EP0309945A2 (en) 1989-04-05
EP0309945A3 EP0309945A3 (en) 1990-05-30
EP0309945B1 EP0309945B1 (en) 1992-05-20

Family

ID=4263265

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88115722A Expired - Lifetime EP0309945B1 (en) 1987-09-29 1988-09-23 Device for applying a descaling agent to the inner surface of a loop

Country Status (13)

Country Link
US (1) US5102468A (en)
EP (1) EP0309945B1 (en)
JP (1) JP2737168B2 (en)
CN (1) CN1020073C (en)
AT (1) ATE76335T1 (en)
CA (1) CA1314793C (en)
CH (1) CH674164A5 (en)
CS (1) CS274438B2 (en)
DE (1) DE3871309D1 (en)
ES (1) ES2031564T3 (en)
MX (1) MX170721B (en)
SU (1) SU1620043A3 (en)
YU (1) YU178488A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111673879A (en) * 2020-06-08 2020-09-18 郑州航空工业管理学院 Green formaldehyde-absorbing concrete slab and forming device

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3137974A (en) * 1962-01-29 1964-06-23 Wyatt S Kirkland Spin-blast tool
US3139711A (en) * 1962-08-28 1964-07-07 Schlumberger Well Surv Corp Pipeline cleaning systems
GB1012442A (en) * 1962-05-22 1965-12-08 Klean Kote Inc Improvements in or relating to pipeline cleaning methods and apparatus
DE1206677B (en) * 1960-04-18 1965-12-09 Klean Kote Inc Method and device for cleaning pipelines by blowing in a sand-air mixture
US4055025A (en) * 1976-11-22 1977-10-25 Union Carbide Corporation Apparatus for improved cleaning of pipeline inlets
FR2483265A1 (en) * 1980-05-29 1981-12-04 Nihon Plant Service Center Ltd Internal painting of pipe - uses high speed spiral air current containing drops of paint
DE3235506A1 (en) * 1982-09-24 1984-03-29 Marubeni Construction Machinery Sales, Inc., Tokyo RESTORATION DEVICE FOR FLUID CHANNELS
EP0133937A1 (en) * 1983-08-17 1985-03-13 Lonza Ag Process for descaling loops
EP0172366A1 (en) * 1984-07-23 1986-02-26 Lonza Ag Method and apparatus for pickling work pieces for making tubes
EP0250881A1 (en) * 1986-07-03 1988-01-07 Lonza Ag Process for applying a fluent material to the inner side of a hollow body, and apparatus for carrying out the process

Family Cites Families (78)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2735814A (en) * 1956-02-21 Die forging compound
US679756A (en) * 1901-05-23 1901-08-06 William Bonbright Kennedy Steam and hot-air flue-cleaner.
US998762A (en) * 1911-05-19 1911-07-25 Cement Appliances Company Apparatus for combining comminuted solids and liquid.
US1577052A (en) * 1925-07-23 1926-03-16 Auspitzer Otto Method and apparatus for comminuting solids and forming colloidal solutions
US1690664A (en) * 1926-01-16 1928-11-06 Carr Fastener Co Ltd Separable fastener
US1944273A (en) * 1929-06-06 1934-01-23 Western Electric Co Lubricating compound
US1987724A (en) * 1930-11-08 1935-01-15 Noble & Wood Machine Co Colloid mill
US1989507A (en) * 1933-05-03 1935-01-29 Diescher Tube Mills Inc Rolling mill mandrel
US1994273A (en) * 1933-12-26 1935-03-12 Goebbel Louis Ornamented lining fabric
US2176879A (en) * 1937-11-20 1939-10-24 Acheson Colloids Corp Method of disintegrating, dispersing and stabilizing graphite and product
US2316571A (en) * 1942-06-04 1943-04-13 Buckeye Lab Inc Apparatus for treating rolling oils
US2588625A (en) * 1945-03-15 1952-03-11 Aluminum Co Of America Forging lubricant and method of using same
NL177969C (en) * 1952-04-30 Mitsui Petrochemical Ind OF AT LEAST TWO LAYERS OF TUBULAR STRUCTURE FOR IRRIGATION.
US3198735A (en) * 1961-10-20 1965-08-03 Edward R Lamson Solid lubricant composition and method for lubricating anti-friction bearing structures
US3242075A (en) * 1962-04-09 1966-03-22 Acheson Ind Inc High temperature lubricant
US3213024A (en) * 1962-07-17 1965-10-19 Socony Mobil Oil Co Inc High temperature lubricant
US3341454A (en) * 1963-02-25 1967-09-12 Hodson Corp Lubricant composition
NL130355C (en) * 1964-09-09
US3344065A (en) * 1965-01-25 1967-09-26 Molykote Produktions G M B H Extreme pressure lubricants
US3919158A (en) * 1966-06-18 1975-11-11 Ciba Geigy Ag Polyvinyl chloride plasticized with mixed phosphate esters
US3384580A (en) * 1967-05-09 1968-05-21 Acheson Ind Inc Graphite dispersions
GB1223562A (en) * 1967-09-05 1971-02-24 British Petroleum Co Improved method of preparing oleophilic compounds
US3472770A (en) * 1967-09-08 1969-10-14 Chevron Res Novel pinion grease
GB1251044A (en) * 1968-01-26 1971-10-27
US3838048A (en) * 1968-06-17 1974-09-24 Diamond Shamrock Corp Polyvinylfluoride bearings
US3549206A (en) * 1969-05-06 1970-12-22 Cons Eng Co Self-purging,pneumatic,conveying apparatus additionally equipped as with agitator and/or scale
GB1374976A (en) * 1970-12-01 1974-11-20 British Petroleum Co Oleophilic graphite
US3801504A (en) * 1971-03-22 1974-04-02 Texaco Inc Non-flammable water based hot forging lubricating compositions
US3698953A (en) * 1971-05-27 1972-10-17 Elca Battery Co Galvanic cell
FR2227182B2 (en) * 1973-01-26 1979-01-19 Usinor
IT964014B (en) * 1972-08-16 1974-01-21 Cavallucci A DEVICE FOR CARRYING OUT THE SANDING BY MEANS OF METAL GRAIN OR SIMILAR TO EXAMPLE INSIDE PIPES
US3806453A (en) * 1973-02-23 1974-04-23 Kaiser Aluminium Chem Corp Metal working lubricant
US3908038A (en) * 1973-03-28 1975-09-23 Allied Chem Thermoplastic molding compositions
US3918284A (en) * 1973-04-20 1975-11-11 Youngstown Sheet And Tube Co Seamless tube mill piercer mandrel and assembly
US3833502A (en) * 1973-04-30 1974-09-03 Nalco Chemical Co Method for improving the adherence of metalworking coolants to metal surfaces
JPS5216826B2 (en) * 1973-06-13 1977-05-11
US4055503A (en) * 1973-10-11 1977-10-25 Robert Bosch G.M.B.H. Lubricating powder and method of producing same and relatively slideable components
GB1438215A (en) * 1974-05-08 1976-06-03 Lonz Ltd High temperature lubricant
US4039337A (en) * 1974-10-23 1977-08-02 Ball Brothers Research Corporation Release coating for glass manufacture
US3994847A (en) * 1974-12-30 1976-11-30 Ball Corporation Aqueous dispersion of polyphenylene sulfide metal phosphate binder and solid lubricant for glass molds coating
US4050932A (en) * 1975-04-07 1977-09-27 General Motors Corporation Colloidal graphite forging lubricant and method
US4104178A (en) * 1975-10-24 1978-08-01 Wyman-Gordon Company Water-based forging lubricant
US3983042A (en) * 1975-10-24 1976-09-28 Wyman-Gordon Company Water-based forging lubricant
CA1075223A (en) * 1975-12-12 1980-04-08 Donald G. Needham Poly (arylene sulfide) antifriction composition
US4090666A (en) * 1976-05-19 1978-05-23 Coors Container Company Gun for tribo charging powder
SU586195A1 (en) * 1976-05-19 1977-12-30 Институт Химии Высокомолекулярных Соединений Ан Украинской Сср "spga-1" lubricant for cold plastic working of metals
GB1600734A (en) * 1977-03-08 1981-10-21 British Petroleum Co Fire resistant grease
US4321295A (en) * 1977-12-23 1982-03-23 Ramu International Modified graphite and process for using same
FR2429051A1 (en) * 1978-06-20 1980-01-18 Trefilunion PROC
US4206060A (en) * 1978-10-23 1980-06-03 Sumitomo Kinzoku Kogyo Kabushiki Kaisha Bolt and nut unit coated with lubricant
FR2440985A1 (en) * 1978-11-07 1980-06-06 Nord Tech Rech Applic ADDITIVE OIL COMPOSITIONS FOR INTERNAL COMBUSTION ENGINES
DE2849617A1 (en) * 1978-11-15 1980-05-29 Dow Corning Gmbh AQUEOUS LUBRICANT
JPS6041829B2 (en) * 1979-01-06 1985-09-19 株式会社日立製作所 Manufacturing method of positive electrode for non-aqueous electrolyte battery
US4228020A (en) * 1979-05-04 1980-10-14 Edwin Cooper, Inc. Lubricating oil composition
US4351815A (en) * 1979-06-11 1982-09-28 Columbian Chemicals Company Battery carbon black
US4339897A (en) * 1979-11-07 1982-07-20 Schmidt Manufacturing, Inc. Sandblasting methods and apparatus
JPS56139212A (en) * 1980-04-02 1981-10-30 Kawasaki Steel Corp Method and apparatus for supplying rolling mill oil
US4357249A (en) * 1980-09-11 1982-11-02 Arguto, Inc. Self-lubricating bearing and the like, and method of making same
US4470939A (en) * 1980-09-25 1984-09-11 Duracell Inc. Method of electrode formation
US4357953A (en) * 1981-02-26 1982-11-09 Sterling Drug Inc. Apparatus for slurrying powdered solids
US4490077A (en) * 1981-07-28 1984-12-25 Nippon Kokan Kabushiki Kaisha Apparatus for continuously measuring flow rate of fine material flowing through transport pipe
JPS58104833A (en) * 1981-12-12 1983-06-22 Kawasaki Steel Corp Continuously supplying method and device for transporting granule from one distributive transportation tank to plural supply ends by controlling mass flow to optional preset value
JPS58167018A (en) * 1982-03-29 1983-10-03 Hitachi Ltd Rolling lubricating device
GB2123917B (en) * 1982-04-30 1986-02-12 Hakko Co Lining underground pipes
US4535812A (en) * 1982-07-12 1985-08-20 The Boc Group, Inc. Time controlled gas flows
DE3227592C1 (en) * 1982-07-21 1983-07-21 Mannesmann AG, 4000 Düsseldorf Process for producing an abrasion-resistant and corrosion-resistant cement mortar lining in metal pipes
US4456539A (en) * 1982-07-29 1984-06-26 Mobil Oil Corporation Triazole-dithiophosphate reaction product and lubricant compositions containing same
ZA84247B (en) * 1983-02-18 1984-09-26 Lonza Ag Parting and lubricating agent in solid form
EP0161318B1 (en) * 1983-08-30 1992-11-04 MITSUI TOATSU CHEMICALS, Inc. Iodine cell
US4687598A (en) * 1983-11-07 1987-08-18 The United States Of America As Represented By The United States Department Of Energy Electrode-active material for electrochemical batteries and method of preparation
US4622709A (en) * 1984-04-16 1986-11-18 Shinichi Matsuda Cleaning apparatus for pipes
US4702860A (en) * 1984-06-15 1987-10-27 Nauchno-Issledovatelsky Institut Kabelnoi Promyshlennosti Po "Sredazkabel" Current-conducting composition
CH670106A5 (en) * 1984-07-23 1989-05-12 Lonza Ag
CH665847A5 (en) * 1985-10-02 1988-06-15 Lonza Ag METHOD FOR SUSPENDING SOLID LUBRICANTS.
US4795495A (en) * 1985-10-11 1989-01-03 Village Of Streamwood Sewer cleaning device
US4668534A (en) * 1986-01-21 1987-05-26 Ben E. Meyers Method and apparatus for applying fusion bonded powder coatings to the internal diameter of tubular goods
US4819471A (en) * 1986-10-31 1989-04-11 Westinghouse Electric Corp. Pilger die for tubing production
US4862838A (en) * 1988-06-07 1989-09-05 Stanadyne Automotive Corp. Crankcase oil spray nozzle for piston cooling

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1206677B (en) * 1960-04-18 1965-12-09 Klean Kote Inc Method and device for cleaning pipelines by blowing in a sand-air mixture
US3137974A (en) * 1962-01-29 1964-06-23 Wyatt S Kirkland Spin-blast tool
GB1012442A (en) * 1962-05-22 1965-12-08 Klean Kote Inc Improvements in or relating to pipeline cleaning methods and apparatus
US3139711A (en) * 1962-08-28 1964-07-07 Schlumberger Well Surv Corp Pipeline cleaning systems
US4055025A (en) * 1976-11-22 1977-10-25 Union Carbide Corporation Apparatus for improved cleaning of pipeline inlets
FR2483265A1 (en) * 1980-05-29 1981-12-04 Nihon Plant Service Center Ltd Internal painting of pipe - uses high speed spiral air current containing drops of paint
DE3235506A1 (en) * 1982-09-24 1984-03-29 Marubeni Construction Machinery Sales, Inc., Tokyo RESTORATION DEVICE FOR FLUID CHANNELS
EP0133937A1 (en) * 1983-08-17 1985-03-13 Lonza Ag Process for descaling loops
EP0172366A1 (en) * 1984-07-23 1986-02-26 Lonza Ag Method and apparatus for pickling work pieces for making tubes
EP0250881A1 (en) * 1986-07-03 1988-01-07 Lonza Ag Process for applying a fluent material to the inner side of a hollow body, and apparatus for carrying out the process

Also Published As

Publication number Publication date
CN1020073C (en) 1993-03-17
DE3871309D1 (en) 1992-06-25
SU1620043A3 (en) 1991-01-07
EP0309945A3 (en) 1990-05-30
CS648088A2 (en) 1990-08-14
ATE76335T1 (en) 1992-06-15
CH674164A5 (en) 1990-05-15
JPH01107917A (en) 1989-04-25
CN1032422A (en) 1989-04-19
US5102468A (en) 1992-04-07
JP2737168B2 (en) 1998-04-08
MX170721B (en) 1993-09-09
ES2031564T3 (en) 1992-12-16
YU178488A (en) 1993-10-20
CS274438B2 (en) 1991-04-11
CA1314793C (en) 1993-03-23
EP0309945B1 (en) 1992-05-20

Similar Documents

Publication Publication Date Title
DE19544353C2 (en) washer
DE2427693C2 (en) Device for the intimate mixing of a gas with a liquid
EP0076472B1 (en) Apparatus for uniformly distributing a stream of bulk material
DE3420318C2 (en)
DE3100001C2 (en)
DE19519092A1 (en) Pneumatic powder=feed device
DE2751968C3 (en) Injector head for introducing a gas flow loaded with abrasive into a pipeline
DE931557C (en) Device for introducing similar workpieces contained in a collecting container into a profile channel
DE2020055A1 (en) Method and device for covering objects with powdery substances
EP0309945B1 (en) Device for applying a descaling agent to the inner surface of a loop
EP0792694B1 (en) Process and device for controlling the flow of a fluidised powder from a container
EP0250881B1 (en) Process for applying a fluent material to the inner side of a hollow body, and apparatus for carrying out the process
DE3527923C2 (en)
DE1262234B (en) Rotary flow vortex for separating solid or liquid particles from gases
DD220770A3 (en) DEVICE FOR PRESSURE AIR RADIATION
DE3042706C2 (en) Method for coupling a test object in the ultrasonic test and ultrasonic probe
DE2648218C3 (en) Process for regulating the washing performance of a venturi tube and devices for carrying out this process
DE2401626B2 (en) Device for descaling a metal wire
DE4041810C2 (en) Multi-wire arc spray gun
DE4021239C2 (en) Method and device for extracting dissolved volatile substances from liquids into the gas phase
DE3834092C2 (en)
DE3207197A1 (en) Device for producing a spray jet
DE3330346A1 (en) SPRAY HEAD FOR THE MIXTURE OF TWO MEDIA
DE8519413U1 (en) Single-hole shower head
AT88706B (en) Process for the production of metallic coatings.

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: A2

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

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

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

17P Request for examination filed

Effective date: 19901127

17Q First examination report despatched

Effective date: 19911011

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

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

REF Corresponds to:

Ref document number: 76335

Country of ref document: AT

Date of ref document: 19920615

Kind code of ref document: T

ITF It: translation for a ep patent filed

Owner name: SOCIETA' ITALIANA BREVETTI S.P.A.

REF Corresponds to:

Ref document number: 3871309

Country of ref document: DE

Date of ref document: 19920625

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
ET Fr: translation filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2031564

Country of ref document: ES

Kind code of ref document: T3

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

Ref country code: CH

Payment date: 19941229

Year of fee payment: 7

EAL Se: european patent in force in sweden

Ref document number: 88115722.6

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

Ref country code: GB

Payment date: 19950817

Year of fee payment: 8

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

Ref country code: SE

Payment date: 19950912

Year of fee payment: 8

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

Ref country code: LI

Effective date: 19950930

Ref country code: CH

Effective date: 19950930

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: GB

Effective date: 19960923

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

Ref country code: SE

Effective date: 19960924

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

Effective date: 19960923

EUG Se: european patent has lapsed

Ref document number: 88115722.6

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

Ref country code: FR

Payment date: 20010921

Year of fee payment: 14

Ref country code: ES

Payment date: 20010921

Year of fee payment: 14

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

Ref country code: AT

Payment date: 20010924

Year of fee payment: 14

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

Ref country code: DE

Payment date: 20011011

Year of fee payment: 14

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

Ref country code: AT

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

Effective date: 20020923

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

Ref country code: ES

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

Effective date: 20020924

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: 20030401

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: 20030603

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20031011

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

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050923