EP0173873A2 - Process for the continuous manufacture of fibrous concrete slabs - Google Patents

Process for the continuous manufacture of fibrous concrete slabs Download PDF

Info

Publication number
EP0173873A2
EP0173873A2 EP85109855A EP85109855A EP0173873A2 EP 0173873 A2 EP0173873 A2 EP 0173873A2 EP 85109855 A EP85109855 A EP 85109855A EP 85109855 A EP85109855 A EP 85109855A EP 0173873 A2 EP0173873 A2 EP 0173873A2
Authority
EP
European Patent Office
Prior art keywords
mass
fiber
base
plate
hydraulically setting
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
EP85109855A
Other languages
German (de)
French (fr)
Other versions
EP0173873B2 (en
EP0173873A3 (en
EP0173873B1 (en
Inventor
Adolf Prof. Dr.-Ing. Meyer
Helmut Dipl.-Geol. Dr. Rer. Nat. Steinegger
Ulrich Dr. Ing. Pachow
Manfred Pfeifer
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.)
Materiaux de Construction International
Original Assignee
Heidelberger Zement 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6243782&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0173873(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Heidelberger Zement AG filed Critical Heidelberger Zement AG
Priority to AT85109855T priority Critical patent/ATE52959T1/en
Publication of EP0173873A2 publication Critical patent/EP0173873A2/en
Publication of EP0173873A3 publication Critical patent/EP0173873A3/en
Application granted granted Critical
Publication of EP0173873B1 publication Critical patent/EP0173873B1/en
Publication of EP0173873B2 publication Critical patent/EP0173873B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon
    • B28B19/0092—Machines or methods for applying the material to surfaces to form a permanent layer thereon to webs, sheets or the like, e.g. of paper, cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/52—Producing shaped prefabricated articles from the material specially adapted for producing articles from mixtures containing fibres, e.g. asbestos cement

Definitions

  • the invention relates to a process for the continuous production of plates and / or molded bodies formed therefrom from fiber-reinforced hydraulically setting compositions.
  • the object of the invention is to provide a method of the type mentioned in which flawlessly fiber-reinforced, uniformly thick plates with a targeted amount of fibers, fiber distribution and / or fiber orientation and molded bodies formed therefrom can be produced with uniformly smooth and optionally tempered surfaces.
  • the hydraulically setting compound is applied in a thickness that is uniform over the working width and the fiber reinforcement can be installed in a targeted manner. It is also possible to work with a mass that does not contain excess water and therefore does not have to be dewatered in a special process step.
  • the targeted fiber distribution and orientation can be easily controlled and monitored very easily, so that a largely uniformity of the plate produced is guaranteed.
  • a base By using a base, a clean, smooth, but if desired also colored and / or structured or profiled plate surface is formed.
  • a particular advantage of the method is that by folding the edge parts of the base around the raw plate edges of the not yet hardened mass, a straight lateral limitation of the plate and a rounding off already during the production process their edges. In this way, a further trimming process, be it in the fresh or hardened state of the plate, can be omitted.
  • the width of the plate can be adjusted from the outset within narrow tolerances and a subsequent straightening of the plate, which is always associated with material losses, is not necessary.
  • the width is adjusted by adjustable but fixed with respect to the moving belt guide elements, which are arranged above the belt at the desired distance from each other.
  • the underlay lying on the belt and moved with it serves both as a separating layer and for shaping the side edges of the plate. It can consist of different materials, for example a plastic film, a glass fleece or plastic-coated paper.
  • a variety of surface design of the plate in terms of color and structure is already possible through the base.
  • the underlay can be provided as formwork and can be removed as perfect and residue-free without any damage to the panel surface. In this way, the surface of the board becomes completely even and smooth and has no rough spots or cracks.
  • the underlay also provides protection for the finished panel, both when stacking and when being transported. Finally, the use of such a base saves the costly post-treatment required in conventional processes, since a base remaining on the plate represents an excellent post-treatment.
  • a mass-absorbing base is placed on a belt designed for continuous movement, to which guide elements are assigned according to the desired width of a plate to be produced.
  • This pad is preferably wider than the predetermined and defined by the distance of the guide members width of the plate to be produced, so that the edge strips at the L ijkssei- th of the base sufficiently high are or can be placed over the tops of the guide members.
  • a hydraulically setting mass is applied to the pad in a uniform thickness and in the width determined by the spacing of the guide elements. This can be done, for example, by extruding the mass through a mouthpiece whose opening corresponds to the width of the plate to be produced.
  • a cutting device is arranged above the transport path of the mass, which continuously ejects chips of the desired length into a chute, from which the chips are then broken down and oriented towards the surface of the Mass to be scattered. Since the mass is continuously moved under the pellet rain, the fiber chips coming from the chute are controllably distributed evenly on the surface of the mass.
  • the fiber chips are then pressed or built into their surface with the aid of a tool that acts on the entire width of the surface of the moving mass.
  • the installation depth can be regulated by adjusting the tool and the fiber distribution in the cross-section of the panel can be selected depending on the requirements.
  • the fiber chips are wetted and the mass is compacted.
  • a resilient tool is expediently used.
  • the process of fiber installation can be repeated several times in the same or in successive layers of the mass applied to the base.
  • continuous fibers can also be placed and / or drawn into the mass of the slab to be produced.
  • the continuous fibers can be impregnated in a manner known per se.
  • the underlay is wider than the plate to be formed and the parts of the underlay projecting above the plate on both sides are drawn up and cover the edges of the plate, the outer sides of these parts of the underlay slide on the guide elements. This prevents the mass from rubbing and adhering to the side of the guide elements. By placing the protruding parts of the underlay around the side edges of the raw panel, these are rounded off neatly.
  • Cement can be sprinkled on the exposed top of the finished raw board and / or a covering, for example a nonwoven that remains attached to the board or a removable film, can be applied.
  • the method according to the invention allows the outer surface of the finished panel to be treated, for example colored, profiled and / or tempered in some other way, even during the manufacturing process.
  • This can be done by applying a layer of paint, a profiled tape or another material suitable for tempering to the exposed side of the base.
  • the layer of paint or another material is absorbed by the moist, hydraulically setting compound extruded onto the base, or the profiling of a profiled strip is pressed into the compound, so that the finished plate is colored, profiled and / or otherwise coated Preserves surface. This means that the plate surface can be reworked later . superfluous.
  • the method according to the invention makes it possible to work with a fiber-reinforced, hydraulically setting mass without excess water.
  • the raw plate is either left as a flat plate until it has finally hardened or is brought into a corresponding shaping device for deformation.
  • additives can be added to optimize the consistency and the cohesiveness.
  • the mass can also be modified by vibration for the installation of the fibers and the molding process.
  • the fibers can be disrupted by suitable shaping of the chute and / or by means of installations in the chute, the latter being able to be moved in a stationary or driven manner.
  • the desired orientation of the fibers is achieved in particular by dimensioning the chute opening to match the fiber length.
  • the resilient tool used for the gentle installation of the fibers in the mass can engage with a plurality of parallel cutting edges in the mass and apply the desired spring force through the inherent elasticity of a material used for its production.

Abstract

A method for the continuous production of plates and/or shaped bodies of fibre reinforced hydraulic setting masses is described in which the mass is provided in a predetermined thickness over the entire width of the plate to be produced, on a substrate continuously moved by a belt. Fibre cuttings from a cutting device are dispersed in a desired distribution onto the surface of the mass moving with the substrate and these are subsequently incorporated into the mass by a tool acting uniformly over the entire width of the mass. The raw plate can be further processed in its still deformable condition and brought into a desired final shape.

Description

Die Erfindung betrifft ein Verfahren zur kontinuierlichen Herstellung von Platten und/oder daraus gebildeten Formkörpern aus faserbewehrten hydraulisch abbindenden Massen.The invention relates to a process for the continuous production of plates and / or molded bodies formed therefrom from fiber-reinforced hydraulically setting compositions.

Die Herstellung von Platten und Formkörpern aus Faserbeton bietet erhebliche Schwierigkeiten und fertigungstechnische Probleme. Beim häufig angewandten Spritzverfahren solcher faserbewehrter Massen ist es insbesondere äusserst schwierig, eine gleichmässig dicke Platte mit gezielter Faserverteilung herzustellen. Hinzu kommt, dass beim Formen und Verformen der Rohplatte die hydraulisch abbindende Masse an der Oberfläche einer Form anklebt, wodurch ein einwandfreies Ver- und Entformen schwierig und oft nicht möglich ist.The production of panels and moldings from fiber reinforced concrete presents considerable difficulties and manufacturing problems. In the frequently used spraying process of such fiber-reinforced compositions, it is particularly difficult to produce a uniformly thick plate with targeted fiber distribution. In addition, when the raw plate is being shaped and deformed, the hydraulically setting compound sticks to the surface of a mold, which makes it difficult and often impossible to deform and demold properly.

Aufgabe der Erfindung ist es, ein Verfahren der eingangs genannten Art zu schaffen, bei dem auf kontinuierlichem Wege einwandfreie faserbewehrte, gleichmässig dicke Platten mit gezielter Fasermenge, Faserverteilung und/oder Faserorientierung und daraus gebildete Formkörper mit gleichmässig glatten und gegebenenfalls vergüteten Oberflächen hergestellt werden können.The object of the invention is to provide a method of the type mentioned in which flawlessly fiber-reinforced, uniformly thick plates with a targeted amount of fibers, fiber distribution and / or fiber orientation and molded bodies formed therefrom can be produced with uniformly smooth and optionally tempered surfaces.

Diese Aufgabe wird durch ein Verfahren der eingangs genannten Art dadurch gelöst, dass die hydraulisch abbindende Masse auf eine auf einem kontinuierlich bewegten Band liegende und mit dem Band fortbewegte Unterlage in einer vorgegebenen Dicke aufgebracht wird, aus einem Schneidwerk kommende Faserschnitzel in dosierter Menge auf die Oberfläche der kontinuierlich fortbewegten vorfixierten Masse aufgestreut und während des Fortbewegens mit einem über die gesamte Arbeitsbredte wirkenden Werkzeug in die Matrix eingedrückt werden und die Masse gleichzeitig verdichtet wird.This object is achieved by a method of the type mentioned at the outset in that the hydraulically setting mass is moved on a continuously moving mass Tape lying and moving with the tape is applied in a predetermined thickness, fiber chips coming from a cutting device are sprinkled in a metered amount onto the surface of the continuously moving pre-fixed mass and pressed into the matrix while moving with a tool that works over the entire work process and the mass is compressed at the same time.

Zweckmässige Weiterbildungen des Verfahrens sind in den Unteransprüchen gekennzeichnet.Appropriate further developments of the method are characterized in the subclaims.

Die Vorteile eines solchen Verfahrens sind vielfältig. Abgesehen davon, dass kontinuierlich gearbeitet werden kann, wird die hydraulisch abbindende Masse in einer über die Arbeitsbreite gleichmässige Dicke aufgebracht und die Faserbewehrung kann gezielt eingebaut werden. Ferner ist es möglich, mit einer Masse zu arbeiten, die kein Uberschusswasser enthält und daher nicht in einem besonderen Verfahrensschritt entwässert werden muss.The advantages of such a process are many. In addition to being able to work continuously, the hydraulically setting compound is applied in a thickness that is uniform over the working width and the fiber reinforcement can be installed in a targeted manner. It is also possible to work with a mass that does not contain excess water and therefore does not have to be dewatered in a special process step.

Die gezielte Faserverteilung und Faserorientierung kann leicht gesteuert und sehr einfach überwacht werden, so dass eine weitgehende Einheitlichkeit der hergestellten Platte gewährlästet ist. Durch Verwendung einer Unterlage wird eine saubere, glatte, aber falls gewünscht auch farbige und/oder strukturierte bzw. profilierte Plattenoberfläche gebildet. Ein besonderer Vorteil des Verfahrens besteht darin, dass durch Umlegen der Randteile der Unterlage um die Rohplattenränder der noch nicht ausgehärteten Masse bereits während des Herstellungsvorgangs eine geradlinige seitliche Begrenzung der Platte und eine Abrundung ihrer Kanten erfolgt. Auf diese Weise kann ein weiterer Besäumungsvorgang, sei es im frischen oder ausgehärteten Zustand der Platte, entfallen. Die Breite der Platte ist von vorneherein in engen Toleranzen einstellbar und ein nachträgliches stets mit Materialverlusten verbundenes Begradigen der Platte ist nicht erforderlich. Die Breiteneinstellung erfolgt durch verstellbare aber gegenüber dem sich bewegenden Band feststehende Führungselemente, die oberhalb des Bandes im gewünschten Abstand voneinander angeordnet sind.The targeted fiber distribution and orientation can be easily controlled and monitored very easily, so that a largely uniformity of the plate produced is guaranteed. By using a base, a clean, smooth, but if desired also colored and / or structured or profiled plate surface is formed. A particular advantage of the method is that by folding the edge parts of the base around the raw plate edges of the not yet hardened mass, a straight lateral limitation of the plate and a rounding off already during the production process their edges. In this way, a further trimming process, be it in the fresh or hardened state of the plate, can be omitted. The width of the plate can be adjusted from the outset within narrow tolerances and a subsequent straightening of the plate, which is always associated with material losses, is not necessary. The width is adjusted by adjustable but fixed with respect to the moving belt guide elements, which are arranged above the belt at the desired distance from each other.

Die auf dem Band liegende und mit diesem fortbewegte Unterlage dient sowohl als Trennschicht als auch zum Formen der Seitenränder der Platte. Sie kann aus verschiedenen Materialien bestehen, beispielsweise aus einer Kunststoff-Folie, einem Glasvlies oder kunststoffbeschichtetem Papier. So wird schon durch die Unterlage eine Vielfalt der Oberflächengestaltung der Platte in farblicher und struktureller Hinsicht möglich. Dabei kann die Unterlage als Schalung vorgesehen und als sdche einwandfrei sowie rückstandsfrei ohne jede Beschädigung der Plattenoberfläche abgezogen werden. Die Plattenoberfläche wird auf diese Weise vollkommen gleichmässig und glatt und weist weder rauhe Stellen noch Risse auf. Andererseits ist es möglich, die verwendete Unterlage selbst und/oder deren Beschichtung mit Vergütungsmaterial in die Plattenoberfläche einzubauen. Damit können den Oberflächen ebener Platten, sowie den Oberflächen der aus der Rohplatte im grünen Zustand geformten Well- oder Trapezplatten oder anderer Formkörper, beispielsweise Rohren, gewünschte Strukturen verliehen werden.The underlay lying on the belt and moved with it serves both as a separating layer and for shaping the side edges of the plate. It can consist of different materials, for example a plastic film, a glass fleece or plastic-coated paper. A variety of surface design of the plate in terms of color and structure is already possible through the base. The underlay can be provided as formwork and can be removed as perfect and residue-free without any damage to the panel surface. In this way, the surface of the board becomes completely even and smooth and has no rough spots or cracks. On the other hand, it is possible to install the base itself and / or its coating with coating material in the surface of the plate. In this way, the surfaces of flat plates, as well as the surfaces of the corrugated or trapezoidal plates or other shaped bodies formed from the raw plate in the green state, for example pipes, can be given desired structures.

Weiterhin bildet die Unterlage auch einen Schutz für die fertige Platte, und zwar sowohl beim Stapeln als auch beim Transportieren. Schliesslich wird durch die Verwendung einer solchen Unterlage eine bei herkömmlichen Verfahren erforderliche kostspielige Nachbehandlung erspart, da eine auf der Platte verbleibende Unterlage eine vorzügliche Nachbehandlung darstellt.The underlay also provides protection for the finished panel, both when stacking and when being transported. Finally, the use of such a base saves the costly post-treatment required in conventional processes, since a base remaining on the plate represents an excellent post-treatment.

Das Verfahren wird anhand eines Ausführungsbeispiels näher erläutert.The method is explained in more detail using an exemplary embodiment.

Auf ein für kontinuierliche Fortbewegung ausgelegtes Band, dem entsprechend der gewünschten Breite einer herzustellenden Platte Führungselemente zugeordnet sind, wird eine die Masse aufnehmende Unterlage aufgelegt. Diese Unterlage ist vorzugsweise breiter als die vorbestimmte und durch den Abstand der Führungselemente festgelegte Breite der herzustellenden Platte, so dass die Randstreifen an den Längssei- ten der Unterlage ausreichend hochstehen oder über die Oberseiten der Führungselemente gelegt werden können. Während die Unterlage mit dem Band vorwärtsbewegt wird, wird auf die Unterlage eine hydraulisch abbindende Masse in gleichmässigerDicke und in der durch den Abstand der Führungselemente bestimmten Breite kontinuierlich aufgebracht. Dies kann beispielsweise durch Extrudieren der Masse durch ein Mundstück erfolgen, dessen Öffnung deιBreite der herzustellenden Platte entspricht. Hinter dem Extruder ist oberhalb des Transportweges der Masse ein Schneidwerk angeordnet, das kontinuierlich Faserschnitzel der gewünschten Länge in einen Fallschacht ausstösst, aus dem die Faserschnitzel dann aufgeschlossen und orientiert auf die Oberfläche der Masse gestreut werden. Da die Masse kontinuierlich unter dem Schnitzelregen fortbewegt wird, werden die aus dem Fallschacht kommenden Faserschnitzel kontrollierbar gleichmässig auf der Oberfläche der Masse verteilt.A mass-absorbing base is placed on a belt designed for continuous movement, to which guide elements are assigned according to the desired width of a plate to be produced. This pad is preferably wider than the predetermined and defined by the distance of the guide members width of the plate to be produced, so that the edge strips at the L ängssei- th of the base sufficiently high are or can be placed over the tops of the guide members. As the pad is moved forward with the belt, a hydraulically setting mass is applied to the pad in a uniform thickness and in the width determined by the spacing of the guide elements. This can be done, for example, by extruding the mass through a mouthpiece whose opening corresponds to the width of the plate to be produced. Behind the extruder, a cutting device is arranged above the transport path of the mass, which continuously ejects chips of the desired length into a chute, from which the chips are then broken down and oriented towards the surface of the Mass to be scattered. Since the mass is continuously moved under the pellet rain, the fiber chips coming from the chute are controllably distributed evenly on the surface of the mass.

In einer weiteren Fertigung'sstation werden dann die Faserschnitzel mit Hilfe eines Werkzeugs, das auf die gesamte Breite der Oberfläche der sich fortbewegenden Masse wirkt, in deren Oberfläche eingedrückt oder eingebaut. Dabei kann durch Einstellung des Werkzeugs die Einbautiefe reguliert und damit die Faserverteilung im Querschnitt der Platte je nach den Erfodernissen gewählt werden. Gleichzeitig werden die Faserschnitzel benetzt und die Masse verdichtet. Zweckmässig wird ein federnd nachgiebiges Werkzeug verwendet.In a further manufacturing station, the fiber chips are then pressed or built into their surface with the aid of a tool that acts on the entire width of the surface of the moving mass. The installation depth can be regulated by adjusting the tool and the fiber distribution in the cross-section of the panel can be selected depending on the requirements. At the same time, the fiber chips are wetted and the mass is compacted. A resilient tool is expediently used.

Der Vorgang des Fasereinbauens kann mehrfach in derselben oder in aufeinanderfolgend auf die Unterlage aufgebrachten Schichten der Masse wiederholt werden.The process of fiber installation can be repeated several times in the same or in successive layers of the mass applied to the base.

Zusätzlich zu der-Bewehrung mit Faserschnitzel können auch Endlosfasern in die Masse der herzustellenden Platte aufgelegt und/oder eingezogen werden. Die Endlosfasern können in an sich bekannter Weise getränkt sein.In addition to the reinforcement with fiber chips, continuous fibers can also be placed and / or drawn into the mass of the slab to be produced. The continuous fibers can be impregnated in a manner known per se.

Da, wie ausgeführt, die Unterlage breiter ist als die zu formende Platte und die beidseitig über die Platte vorstehenden Teile der Unterlage nach oben gezogen sind und dabei die Plattenränder bedecken, gleiten die Aussenseiten dieser Teile der Unterlagen an den Führungselementen. Dadurch wird ein Reiben und seitliches Anhaften der Masse an den Führungselementen verhindert. Durch Umlegen der vorstehenden Teile der Unterlage um die Seitenkanten der Rohplatte werden diese sauber abgerundet.Since, as stated, the underlay is wider than the plate to be formed and the parts of the underlay projecting above the plate on both sides are drawn up and cover the edges of the plate, the outer sides of these parts of the underlay slide on the guide elements. This prevents the mass from rubbing and adhering to the side of the guide elements. By placing the protruding parts of the underlay around the side edges of the raw panel, these are rounded off neatly.

Auf die freiliegende Oberseite der fertigen Rohplatte kann Zement gestreut und/oder eine Abdeckung, beispielsweise ein mit der Platte verbunden bleibendes Vlies oder eine abziehbare Folie, aufgebracht werden.Cement can be sprinkled on the exposed top of the finished raw board and / or a covering, for example a nonwoven that remains attached to the board or a removable film, can be applied.

Das erfindungsgemässe Verfahren gestattet es, die Aussenfläche der fertigen Platte schon während des Herstellungsvorgangs zu behandeln, beispielsweise einzufärben, zu profilieren und/oder in einer anderen Weise zu vergüten. Dies kann dadurch geschehen, dass auf die freiliegende Seite der Unterlage eine sich von dieser lösende Farbschicht, ein Profilband oder ein anderes zur Vergütung geeignetes Material aufgebracht wird. Die Schicht aus Farbe oder einem anderen Material wird von der feuchten, auf die Unterlage extrudierten hydraulisch abbindenden Masse aufgenommen, oder die Profilierung eines Profilbandes drückt sich in die Masse ein, so dass die fertige Platte eine farbige, profilierte und/oder auf andere Weise vergütete Oberfläche erhält. Dadurch wird eine spätere Nachbearbeitung der Plattenoberfläche.überflüssig.The method according to the invention allows the outer surface of the finished panel to be treated, for example colored, profiled and / or tempered in some other way, even during the manufacturing process. This can be done by applying a layer of paint, a profiled tape or another material suitable for tempering to the exposed side of the base. The layer of paint or another material is absorbed by the moist, hydraulically setting compound extruded onto the base, or the profiling of a profiled strip is pressed into the compound, so that the finished plate is colored, profiled and / or otherwise coated Preserves surface. This means that the plate surface can be reworked later . superfluous.

Durch das erfindungsgemässe Verfahren ist überraschenderweise ein Arbeiten mit einer faserbewehrten, hydraulisch abbindenden Masse ohne Uberschusswasser möglich.Surprisingly, the method according to the invention makes it possible to work with a fiber-reinforced, hydraulically setting mass without excess water.

Die Rohplatte wird entweder als ebene Platte bis zum endgültigen Aushärten liegengelassen oder zur Verformung in eine entsprechende Formvorrichtung gebracht.The raw plate is either left as a flat plate until it has finally hardened or is brought into a corresponding shaping device for deformation.

Um den Einbau der Fasern und den Verformvorgang gegebenenfalls zu erleichtern, können Zusätze zugegeben werden, um die Konsistenz und das Zusammenhaltevermögen zu optimieren. Die Masse kann durch Vibrieren für den Einbau der Fasern und den Formvorgang zusätzlich modifiziert werden.In order to facilitate the installation of the fibers and the shaping process if necessary, additives can be added to optimize the consistency and the cohesiveness. The mass can also be modified by vibration for the installation of the fibers and the molding process.

Das Aufschließen der Fasern kann durch geeignete Formgebung des Fallschachts und/oder durch Einbauten im Fallschacht erfolgen, wobei letztere stationär oder angetrieben bewegt sein können. Die gewünschte Orientierung der Fasern wird insbesondere durch eine an die Faserlänge angepaßte Dimensionierung der Fallschachtöffnung erzielt.The fibers can be disrupted by suitable shaping of the chute and / or by means of installations in the chute, the latter being able to be moved in a stationary or driven manner. The desired orientation of the fibers is achieved in particular by dimensioning the chute opening to match the fiber length.

Das zum schonenden Einbau der Fasern in die Masse dienende federnd nachgiebige Werkzeug kann mit einer Mehrzahl paralleler Schneiden in die Masse eingreifen und die gewünschte Federkraft durch die Eigenelastizität eines zu seiner Herstellung verwendeten Materials aufbringen.The resilient tool used for the gentle installation of the fibers in the mass can engage with a plurality of parallel cutting edges in the mass and apply the desired spring force through the inherent elasticity of a material used for its production.

Claims (12)

1. Verfahren zur kontinuierlichen Herstellung von Platten und/ oder Formkörpern aus faserbewehrten hydraulisch abbindenden Massen, dadurch gekennzeichnet, dass die hydraulisch abbindende Masse auf eine auf einem kontinuierlich bewegten Band liegende und mit dem Band fortbewegte Unterlage in einer vorgegebenen Dicke aufgebracht wird, aus einem Schneidwerk kommende Faserschnitzel in dosierter Menge auf die Oberfläche der kontinuierlich fortbewegten vorfixierten Masse aufgestreut und während des Fortbewegens mit einem über die gesamte Arbeitsbreite wirkenden Werkzeug in die Masse eingedrückt werden und die Masse gleichzeitig verdichtet wird.1. A process for the continuous production of plates and / or moldings from fiber-reinforced hydraulically setting masses, characterized in that the hydraulically setting mass is applied to a base lying on a continuously moving belt and moving with the belt in a predetermined thickness, from a cutting unit Coming fiber chips in a metered amount are sprinkled onto the surface of the continuously moving pre-fixed mass and pressed into the mass while moving with a tool that works over the entire working width and the mass is compressed at the same time. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Faserschnitzel durch einen Fallschacht geführt und dabei aufgeschlossen und orientiert auf die Oberfläche der Masse gelenkt werden.2. The method according to claim 1, characterized in that the fiber chips are guided through a chute and thereby opened and oriented to the surface of the mass. , 3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Faserschnitzel durch ein federnd nachgiebiges Werkzeug faserschonend in der gewünschten Verteilung in die Masse eingebaut werden., 3. The method according to claim 1, characterized in that the fiber chips are installed by a resilient tool fiber-friendly in the desired distribution in the mass. 4. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass in die mit Faserschnitzeln bewehrte Masse zusätzlich Endlosfaserbündel aufgelegt und/oder eingezogen werden.4. The method according to claim 1, characterized in that additional fiber bundles are placed and / or drawn into the mass reinforced with fiber chips. 5. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Masse mit einem für die Hydratation in wesentlichen gerade ausreichenden Wassergehalt verwendet wird.5. The method according to claim 1, characterized in that the mass is used with a water content which is substantially just sufficient for hydration. 6. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die hydraulisch abbindende Masse in einer vorgegebenen Dicke auf die Unterlage extrudiert wird.6. The method according to claim 1, characterized in that the hydraulically setting mass is extruded onto the base in a predetermined thickness. 7. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der Arbeitsgang des Aufstreuens sowie Eindrückens der Faserschnitzel in die kontinuierlich fortbewegte Masse zweimal oder mehrmals wiederholt wird.7. The method according to claim 1, characterized in that the operation of sprinkling and pressing the fiber chips into the continuously moving mass is repeated two or more times. 8. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der Arbeitsgang des Aufstreuens sowie Eindrückens der Faserschnitzel in nacheinander und aufeinander aufgebaute Schichten der kontinuierlich fortbewegten Masse durchgeführt wird.8. The method according to claim 1, characterized in that the operation of sprinkling and pressing the fiber chips into successive and successive layers of the continuously moving mass is carried out. 9. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Unterlage breiter ist als die Breite der herzustellenden Platte und die an den Längsseiten über den Rand der Rohplatte vorstehenden Teile der Unterlage um den Rohplattenrand umgelegt werden. ,9. The method according to claim 1, characterized in that the base is wider than the width of the plate to be produced and the parts of the base projecting on the long sides over the edge of the raw plate are folded around the edge of the raw plate. , 10. Verfahren nach einem oder mehreren der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass auf die freiliegende Seite der faserbewehrten noch nicht abgebundenen Masse Zement aufgestreut und/oder eine Abdeckung aufgelegt wird.10. The method according to one or more of claims 1 to 9, characterized in that cement is sprinkled onto the exposed side of the fiber-reinforced mass which has not yet set and / or a cover is placed on it. 11. Verfahren nach einem oder mehreren der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass zur Vergütung der Plattenoberfläche die Seite der Unterlage, auf die die Masse aufgebracht wird, mit einer von dieser Unterlage lösbaren Schicht aus einem entsprechenden in die auf der Unterlage liegenden Fläche der hydraulisch abbindenden Masse integrierbaren Vergütungsmaterial belegt wird.11. The method according to one or more of claims 1 to 10, characterized in that for the coating of the plate surface, the side of the base to which the mass is applied, with a detachable layer from this base from a corresponding in the surface lying on the base of the hydraulically setting compound that can be integrated into the coating material. 12. Verfahren nach einem oder mehreren der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass die nicht ausgehärtete Rohplatte zur Formgebung in einer entsprechenden Vorrichtung in eine Endform gebracht wird.12. The method according to one or more of claims 1 to 11, characterized in that the uncured raw plate for shaping is brought into a final shape in a corresponding device.
EP85109855A 1984-08-24 1985-08-06 Process for the continuous manufacture of fibrous concrete slabs Expired - Lifetime EP0173873B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85109855T ATE52959T1 (en) 1984-08-24 1985-08-06 PROCESS FOR CONTINUOUS PRODUCTION OF FIBER CONCRETE PANELS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3431143A DE3431143A1 (en) 1984-08-24 1984-08-24 METHOD FOR CONTINUOUSLY PRODUCING FIBER-CONCRETE PANELS
DE3431143 1984-08-24

Publications (4)

Publication Number Publication Date
EP0173873A2 true EP0173873A2 (en) 1986-03-12
EP0173873A3 EP0173873A3 (en) 1988-07-27
EP0173873B1 EP0173873B1 (en) 1990-05-23
EP0173873B2 EP0173873B2 (en) 1992-09-16

Family

ID=6243782

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85109855A Expired - Lifetime EP0173873B2 (en) 1984-08-24 1985-08-06 Process for the continuous manufacture of fibrous concrete slabs

Country Status (14)

Country Link
US (1) US4655982A (en)
EP (1) EP0173873B2 (en)
JP (1) JPH0698614B2 (en)
AT (1) ATE52959T1 (en)
AU (1) AU571720B2 (en)
BR (1) BR8504041A (en)
CA (1) CA1261126A (en)
DE (2) DE3431143A1 (en)
ES (1) ES8604042A1 (en)
HK (1) HK70290A (en)
IN (1) IN165668B (en)
MX (1) MX162317A (en)
SG (1) SG55390G (en)
ZA (1) ZA856037B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5030287A (en) * 1988-07-18 1991-07-09 Fibronit S.R.L. Cement mix and method for producing reinforced building sheets from a cement mix
FR2756207A1 (en) * 1996-11-28 1998-05-29 Mci Sa PROCESS FOR MANUFACTURING REINFORCED PLATES
WO1998028116A1 (en) * 1996-12-05 1998-07-02 Wolfgang Weiser Method and device for the production of a surface product with a fiber reinforced concrete matrix
WO2015197620A1 (en) 2014-06-23 2015-12-30 RATHENOW JöRG Method and sealing layer for finishing materials

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4017604A1 (en) * 1990-05-31 1991-12-05 Kolbermoor Faserbetonwerk METHOD FOR THE CONTINUOUS OR CLOCKED PRODUCTION OF PANELS AND / OR MOLDED BODIES FROM FIBER-REINFORCED HYDRAULICALLY BINDING MASSES, AND RELATED PANELS AND / OR MOLDED BODIES
DE4416160A1 (en) * 1994-05-09 1995-11-16 Durapact Glasfaserbetontechn Process and device for the continuous production of fiber-reinforced molded articles from hydraulically settable compositions
DE19654564C2 (en) * 1996-12-27 2000-01-20 Fertig Decken Union Gmbh Casting process suitable for the plant and construction site for the manufacture of a large-format component reinforced by fibers with a relatively large thickness made of concrete
US6682671B1 (en) * 2000-05-18 2004-01-27 The United States Of America As Represented By The Secretary Of The Army Method of manufacturing fiber-reinforced structures incorporating recycled carpet fibers
US7211180B2 (en) * 2003-02-10 2007-05-01 Robert Bosch Corporation Contamination-resistant gas sensor element
DE102004028801B4 (en) * 2004-06-15 2010-09-09 Findeisen Gmbh Needle nonwoven having a surface structure and method and apparatus for producing a needlepunch having a surface structure
CN102926502B (en) * 2012-11-01 2014-12-24 中国人民解放军总后勤部建筑工程研究所 Three-dimensional spacer fabric reinforced cement based composite material and preparation method and construction method thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4187275A (en) 1974-06-14 1980-02-05 H. H. Robertson Company Method and apparatus for producing shaped glass fiber reinforced cementitious articles

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2239860A (en) * 1937-04-28 1941-04-29 United States Gypsum Co Method of making plastic products
US3136661A (en) * 1957-03-07 1964-06-09 Schjeldahl Co G T Applicator apparatus for depositing dissolved plastic ribbons
US3526691A (en) * 1968-09-09 1970-09-01 Certain Teed Prod Corp Method for making asbestos-cement shapes
US3944698A (en) * 1973-11-14 1976-03-16 United States Gypsum Company Gypsum wallboard and process for making same
ZA751858B (en) * 1974-03-26 1976-02-25 A C I Tech Centre Apparatus for manufacturing plaster sheets
DE2456712B2 (en) * 1974-11-30 1976-09-23 Franz Grötz KG, 7560 Gaggenau PROCESS FOR THE MANUFACTURING OF FIBER CONCRETE, FIBER MORTAR OR ANY OTHER FIBER BUILDING MATERIAL
JPS52117313A (en) * 1976-03-27 1977-10-01 Furantsu Guretsutsu Kg Production method of fiber contained concrete construction member
JPS5328932A (en) * 1976-08-28 1978-03-17 Ebara Mfg Device for opening closing valve
JPS5354219A (en) * 1976-10-28 1978-05-17 Asahi Glass Co Ltd Continuous process for production of f r c and apparatus therefor
GB2004807A (en) * 1977-09-26 1979-04-11 Gillespie D L Improvements in mixing fibre- reinforced cementitious material
DE2755879A1 (en) * 1977-12-15 1979-06-21 Rigips Baustoffwerke Gmbh METHOD AND DEVICE FOR MANUFACTURING A BUILDING PANEL USING PLASTER
US4265979A (en) * 1978-06-05 1981-05-05 United States Gypsum Company Method for the production of glass fiber-reinforced gypsum sheets and gypsum board formed therefrom
JPS557363A (en) * 1978-06-30 1980-01-19 Matsushita Electric Works Ltd Apparatus for connecting water collector and trough member
DE2829582C3 (en) * 1978-07-05 1982-01-07 Marbeton Kies- U. Betonwerk Marstetten Gmbh, 7971 Aitrach Formwork form for the production of profiled, fiber-reinforced concrete parts, in particular glass fiber-reinforced concrete parts
US4362675A (en) * 1979-06-25 1982-12-07 Owens-Corning Fiberglas Corporation Method of delaying hardening of inorganic binders
US4335177A (en) * 1979-10-03 1982-06-15 Kurimoto Iron Works, Ltd. Glass fiber-reinforced cement plates
FR2477066A1 (en) * 1980-03-03 1981-09-04 Placoplatre Sa Plaster-board production conveyor - has freely turning grooving roller acting against cardboard sheet cladding for board to aid folding
US4298413A (en) * 1980-03-03 1981-11-03 Teare John W Method and apparatus for producing concrete panels
DE3142598C1 (en) * 1981-10-27 1983-06-09 Fa. Carl Freudenberg, 6940 Weinheim Shaped body made of a binding, mineral material and reinforcing fibers embedded in it
DE3215542C2 (en) * 1982-04-26 1985-08-08 Fulgurit GmbH & Co KG, 3050 Wunstorf Method and device for the production of asbestos cement panels
DE3247009A1 (en) * 1982-12-18 1984-06-20 Bison-Werke Bähre & Greten GmbH & Co KG, 3257 Springe Process for continuously producing plaster-bound panels, and device for carrying out the process
US4504335A (en) * 1983-07-20 1985-03-12 United States Gypsum Company Method for making reinforced cement board

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4187275A (en) 1974-06-14 1980-02-05 H. H. Robertson Company Method and apparatus for producing shaped glass fiber reinforced cementitious articles

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5030287A (en) * 1988-07-18 1991-07-09 Fibronit S.R.L. Cement mix and method for producing reinforced building sheets from a cement mix
FR2756207A1 (en) * 1996-11-28 1998-05-29 Mci Sa PROCESS FOR MANUFACTURING REINFORCED PLATES
WO1998023423A1 (en) * 1996-11-28 1998-06-04 Materiaux De Construction International (M.C.I.) Method for making reinforced slabs
WO1998028116A1 (en) * 1996-12-05 1998-07-02 Wolfgang Weiser Method and device for the production of a surface product with a fiber reinforced concrete matrix
WO2015197620A1 (en) 2014-06-23 2015-12-30 RATHENOW JöRG Method and sealing layer for finishing materials

Also Published As

Publication number Publication date
ES8604042A1 (en) 1986-02-01
ZA856037B (en) 1986-03-26
MX162317A (en) 1991-04-24
EP0173873B2 (en) 1992-09-16
BR8504041A (en) 1986-06-10
SG55390G (en) 1991-01-18
EP0173873A3 (en) 1988-07-27
JPH0698614B2 (en) 1994-12-07
DE3431143C2 (en) 1990-01-04
EP0173873B1 (en) 1990-05-23
ATE52959T1 (en) 1990-06-15
CA1261126A (en) 1989-09-26
JPS61246009A (en) 1986-11-01
AU4576285A (en) 1986-02-27
DE3431143A1 (en) 1986-03-06
AU571720B2 (en) 1988-04-21
US4655982A (en) 1987-04-07
ES545514A0 (en) 1986-02-01
IN165668B (en) 1989-12-02
HK70290A (en) 1990-09-14
DE3577821D1 (en) 1990-06-28

Similar Documents

Publication Publication Date Title
DE2910432C2 (en)
DE2457848A1 (en) COMPRESSED BODY
EP0173873B1 (en) Process for the continuous manufacture of fibrous concrete slabs
CH637610A5 (en) METHOD AND DEVICE FOR PRODUCING MOLDED BODIES FROM A HYDRAULICALLY BONDED MATERIAL.
EP2197640B1 (en) Method for producing accessory tiles and device for producing said accessory tiles
DE3840377A1 (en) Process and apparatus for producing building boards
DE3448348C2 (en) Continuous fibre reinforced cement slab mfr
EP0308659B1 (en) Method and device for cleaning pallets for the moulding of plates of a hardenable plastic material
DE2205603A1 (en) AUTOMATED CONVEYOR BELT FOR PLASTER CASTINGS
DE4135581A1 (en) Reinforced construction plate - has spaced grids embedded in coating mass covering base plate, grids are kept apart by distance holders of swellable material
EP0625088B1 (en) Process for producing composite boards
EP0595287A1 (en) Process for the production of semi-finished corner units of laminate
EP0459271A2 (en) Process for the continuous or sequenced manufacture of plates and/or products from water setting, fibre reinforced materials and obtained plates and/or products
DE1459328C (en) Process for the production of wood wool lightweight panels with Auflageschich th and device for its implementation
EP0166070B1 (en) Process and device for manufacturing preshaped plastic elements for wall coverings
DE69916618T2 (en) DEVICE AND METHOD FOR PRODUCING BUILDING PLATES
DE1584719C3 (en) Device for making concrete roof tiles
DE10228935C1 (en) Particle board plant includes textured belt comprising individual transverse slats connected together and passing through pressing zone
DE2705546A1 (en) Rectangular or square floor or wall plates - are extruded edgeways and impressed with cut pattern for ready separation
DE1459306C (en) Device for the continuous production of plasterboard
EP0308661A1 (en) Method and device for cleaning pallets for the moulding of plates of a hardenable plastic material
DE4324068C1 (en) Method and device for manufacturing a standing board stone made of concrete
DE1459328B (en) Process for the production of wood wool lightweight panels with support layers and device for its implementation
EP3664979A2 (en) Method for the production of a curable, plate-shaped light body, tool for carrying out the method, and light guide body produced according to the method
DE2158653A1 (en) METHOD AND DEVICE FOR MANUFACTURING CEMENT-BONDED BUILDING PANELS

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 BE CH DE FR GB IT LI LU NL SE

RIN1 Information on inventor provided before grant (corrected)

Inventor name: PFEIFER, MANFRED

Inventor name: PACHOW, ULRICH, DR. ING.

Inventor name: STEINEGGER, HELMUT, DIPL.-GEOL. DR. RER. NAT.

Inventor name: MEYER, ADOLF, PROF. DR.-ING.

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

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

17P Request for examination filed

Effective date: 19880630

17Q First examination report despatched

Effective date: 19890609

ITF It: translation for a ep patent filed

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

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

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

REF Corresponds to:

Ref document number: 52959

Country of ref document: AT

Date of ref document: 19900615

Kind code of ref document: T

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

Ref document number: 3577821

Country of ref document: DE

Date of ref document: 19900628

ET Fr: translation filed
PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: FENOX-NEDERLAND B.V.

Effective date: 19910225

NLR1 Nl: opposition has been filed with the epo

Opponent name: FENOX-NEDERLAND B.V.

ITTA It: last paid annual fee
PUAH Patent maintained in amended form

Free format text: ORIGINAL CODE: 0009272

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT MAINTAINED AS AMENDED

ITF It: translation for a ep patent filed

Owner name: DE DOMINICIS & MAYER S.

27A Patent maintained in amended form

Effective date: 19920916

AK Designated contracting states

Kind code of ref document: B2

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

REG Reference to a national code

Ref country code: CH

Ref legal event code: AEN

GBTA Gb: translation of amended ep patent filed (gb section 77(6)(b)/1977)
ET3 Fr: translation filed ** decision concerning opposition
NLR2 Nl: decision of opposition
NLR3 Nl: receipt of modified translations in the netherlands language after an opposition procedure
EPTA Lu: last paid annual fee
EAL Se: european patent in force in sweden

Ref document number: 85109855.8

REG Reference to a national code

Ref country code: CH

Ref legal event code: PUE

Owner name: HEIDELBERGER ZEMENT AG TRANSFER- MATERIAUX DE CONS

NLS Nl: assignments of ep-patents

Owner name: MATERIAUX DE CONSTRUCTION INTERNATIONAL

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

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

Ref country code: FR

Payment date: 20020719

Year of fee payment: 18

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

Ref country code: GB

Payment date: 20020731

Year of fee payment: 18

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

Ref country code: SE

Payment date: 20020806

Year of fee payment: 18

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

Ref country code: AT

Payment date: 20020813

Year of fee payment: 18

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

Ref country code: CH

Payment date: 20020815

Year of fee payment: 18

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

Ref country code: GB

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

Effective date: 20030806

Ref country code: AT

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

Effective date: 20030806

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

Ref country code: SE

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

Effective date: 20030807

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: 20030831

Ref country code: CH

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

Effective date: 20030831

EUG Se: european patent has lapsed
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20030806

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: 20040430

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

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

Ref country code: BE

Payment date: 20040713

Year of fee payment: 20

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

Ref country code: LU

Payment date: 20040723

Year of fee payment: 20

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

Ref country code: NL

Payment date: 20040803

Year of fee payment: 20

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

Ref country code: DE

Payment date: 20040819

Year of fee payment: 20

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 EXPIRATION OF PROTECTION

Effective date: 20050806

BE20 Be: patent expired

Owner name: *MATERIAUX DE CONSTRUCTION INTERNATIONAL

Effective date: 20050806

NLV7 Nl: ceased due to reaching the maximum lifetime of a patent

Effective date: 20050806

BE20 Be: patent expired

Owner name: *MATERIAUX DE CONSTRUCTION INTERNATIONAL

Effective date: 20050806