EP0652318B1 - Method for producing a shell-like pipe insulation - Google Patents

Method for producing a shell-like pipe insulation Download PDF

Info

Publication number
EP0652318B1
EP0652318B1 EP94116873A EP94116873A EP0652318B1 EP 0652318 B1 EP0652318 B1 EP 0652318B1 EP 94116873 A EP94116873 A EP 94116873A EP 94116873 A EP94116873 A EP 94116873A EP 0652318 B1 EP0652318 B1 EP 0652318B1
Authority
EP
European Patent Office
Prior art keywords
wool
process according
sheep
water
virgin wool
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP94116873A
Other languages
German (de)
French (fr)
Other versions
EP0652318A1 (en
Inventor
Fritz Doppelmayer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0652318A1 publication Critical patent/EP0652318A1/en
Application granted granted Critical
Publication of EP0652318B1 publication Critical patent/EP0652318B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/04—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres having existing or potential cohesive properties, e.g. natural fibres, prestretched or fibrillated artificial fibres
    • D04H1/08—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres having existing or potential cohesive properties, e.g. natural fibres, prestretched or fibrillated artificial fibres and hardened by felting; Felts or felted products
    • D04H1/22—Three-dimensional articles formed by felting processes
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • D04H1/498—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres entanglement of layered webs

Definitions

  • the invention relates to a method for producing a shell-shaped pipe insulation, at least with one Longitudinal slot is made of a fiber existing material (GB-A-1 093 852).
  • Such shell-shaped pipe insulation is made of glass or Mineral wool produced, with a variety of Layers are wrapped.
  • the invention has for its object a method to demonstrate with the shell-shaped pipe insulation can be produced, which the shown unfavorable side effects.
  • Sheep wool has already become a great insulation material proven; by the manufacturing method according to the invention very dimensionally stable insulating bodies can be produced which simply plugged onto the pipes to be insulated and then be closed along the longitudinal slot.
  • the sheep's wool is first carded, then is blown into the inlet funnel during the Forms is moistened in the inlet funnel and in Dried after molding and then is slit lengthways.
  • the sheep wool at least slightly needled and then in a continuous process a tubular strand is brought together, one Longitudinal seam is created and when the sheep's wool before or during of the forming moistened and after the forming is dried.
  • the fibers already have one before the forming Hold to each other, what about forming, moistening and the subsequent drying is intensified.
  • This outer shell can be made of different materials consist; however, it has proven very beneficial if according to the invention also the outer shell Sheep wool exists.
  • loose, previously carded sheep's wool 1 is fed to an inlet funnel 2, in the center of which a mandrel 3 is provided for calibrating an inner cavity.
  • nozzles 4 and 5 are provided, with which water is sprayed onto the sheep's wool.
  • the outside diameter of the pipe string being formed is additionally calibrated.
  • a microwave oven 7 is subsequently arranged through which the pipe string goes through, which before sprayed water is evaporated. This gives them Sheep wool fibers form a very intimate connection with one another although at the same time there is a large proportion of air between the Fibers remain and thus achieve a good insulation effect becomes.
  • the sheep's wool fibers remain themselves cold as they are not affected by the microwaves. However, the water is heated and evaporated very quickly.
  • one Slot device 8 is provided with which the wall the pipe string is cut in the longitudinal direction, whereby the pipe string can be easily applied to pipes can.
  • carded sheep wool 22 is then placed loosely and in a needling station 23 in itself and with the outer layer loosely needled.
  • the weakly compacted so produced Web 24 is then fed to an inlet hopper 25 where the web 24 wrapped around a calibration mandrel 26 and on the inside and outside at the same time Dimensions is calibrated.
  • the two longitudinal edges of the railway are placed close together, so that one closed but easy to open longitudinal seam.
  • nozzles 27, 28 arranged with which water on the sheep's wool web 24 is sprayed, which causes the sheep's wool fibers during forming be networked.
  • a microwave oven 30 Behind the inlet funnel 25 and a downstream shaping tube 29 is a microwave oven 30 arranged, which is designed as a continuous furnace and the pipe string formed in the inlet funnel is run continuously. Following this Microwave oven is a cross cutting device 31 provided in which the tubing string into individual Sections 32 is divided.
  • the attachment is also in the embodiment according to FIG an outer location possible, for example one pre-needled thin sheet simultaneously with the sheep's wool fibers in the inlet funnel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Thermal Insulation (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Manufacturing Of Electric Cables (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Resistance Heating (AREA)

Abstract

Method for producing a shell-like pipe insulation, provided with at least one longitudinal slit, from a material consisting of fibres. Sheep's wool is provided according to the invention as a fibrous material, the sheep's wool being moistened with water and being shaped in an entry funnel to form a tubular strand, whereupon the water is removed from the tubular strand by evaporation and the strand is, if appropriate, slit longitudinally. <IMAGE>

Description

Die Erfindung betrifft ein Verfahren zum Herstellen einer schalenförmigen Rohrisolierung, die wenigstens mit einem Längsschlitz versehen wird, aus einem aus Fasern bestehenden Material (GB-A-1 093 852).The invention relates to a method for producing a shell-shaped pipe insulation, at least with one Longitudinal slot is made of a fiber existing material (GB-A-1 093 852).

Derartige schalenförmige Rohrisolierungen werden aus Glas- oder Mineralwolle hergestellt, wobei eine Vielzahl von Lagen übereinandergewickelt wird.Such shell-shaped pipe insulation is made of glass or Mineral wool produced, with a variety of Layers are wrapped.

In ihrer Isolierwirkung haben sich derartige Rohrisolierungen zwar bewährt, bei der Verarbeitung, insbesondere beim Schneiden der bekannten Rohrisolierungen, werden jedoch einzelne Fasern abgelöst, die in die Haut eindringen und unangenehme Juckreize sowie Allergien verursachen. Darüber hinaus ist nicht auszuschließen, daß Faserstücke auch in die Atemwege gelangen. Darüber hinaus wird zur Verfestigung der Isolierung Formaldehyd als Bindemittel eingesetzt, was sich bereits bei anderen Baustoffen als gesundheitsgefährdend herausgestellt hat.Such have in their insulating effect Pipe insulation has proven itself in processing, especially when cutting the known pipe insulation, however, individual fibers are released into the skin penetrate and uncomfortable itching as well as allergies cause. In addition, it cannot be ruled out that Pieces of fiber also get into the airways. Furthermore is used to solidify the insulation as formaldehyde Binder used, which is already in others Has identified building materials as hazardous to health.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren aufzuzeigen, mit dem schalenförmige Rohrisolierungen hergestellt werden können, welche die aufgezeigten ungünstigen Begleiterscheinungen nicht aufweisen.The invention has for its object a method to demonstrate with the shell-shaped pipe insulation can be produced, which the shown unfavorable side effects.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß als faseriges Material Schafwolle vorgesehen ist, wobei die Schafwolle mit Wasser angefeuchtet und in einem Einlauftrichter zu einem rohrförmigen Strang geformt wird, worauf das Wasser aus dem rohrförmigen Strang durch Verdampfen entfernt und der Strang eventuell längsgeschlitzt wird.This object is achieved in that as fibrous material sheep wool is provided, the Sheep wool moistened with water and in one Inlet funnel is formed into a tubular strand, whereupon the water from the tubular strand passes through Evaporation removed and the strand possibly is slit lengthways.

Schafwolle hat sich bereits als Isoliermaterial sehr bewährt; durch das erfindungsgemäße Herstellungsverfahren lassen sich sehr formstabile Isolierkörper herstellen, die einfach auf die zu isolierenden Rohrleitungen aufgesteckt und dann entlang des Längsschlitzes verschlossen werden.Sheep wool has already become a great insulation material proven; by the manufacturing method according to the invention very dimensionally stable insulating bodies can be produced which simply plugged onto the pipes to be insulated and then be closed along the longitudinal slot.

Bei der Verwendung von Schafwolle treten die geschilderten unangenehmen Nebeneffekte nicht auf. Darüber hinaus läßt sich die Schafwolle beim Entfernen der Isolierung ohne Probleme entsorgen, da sie biologisch abbaubar istWhen using sheep's wool, the described unpleasant side effects. In addition, leaves the sheep wool without removing the insulation Dispose of problems as it is biodegradable

Als sehr vorteilhaft hat es sich erwiesen, wenn erfindungsgemäß die Schafwolle zuerst kardiert wird, dann in den Einlauftrichter eingeblasen wird, während des Formens im Einlauftrichter angefeuchtet wird und im Anschluß an den Formvorgang getrocknet und dann längsgeschlitzt wird.It has proven to be very advantageous if According to the invention, the sheep's wool is first carded, then is blown into the inlet funnel during the Forms is moistened in the inlet funnel and in Dried after molding and then is slit lengthways.

Beim Kardieren der Wolle werden die Fasern weitgehend entflochten, so daß ein einwandfreies Einblasen in den Einlauftrichter möglich ist. Durch das Anfeuchten der Schafwolle erhalten die Fasern untereinander eine gute Verbindung, die beim Trocknen fixiert wird.When carding the wool, the fibers become largely unbundled, so that a perfect blowing into the Inlet funnel is possible. By moistening the Sheep wool get the fibers among themselves a good one Connection that is fixed during drying.

Sehr vorteilhaft ist es auch, wenn gemäß einer weiteren Ausgestaltung der Erfindung die Schafwolle wenigstens geringfügig genadelt und dann im Durchlaufverfahren zu einem rohrförmigen Strang zusammengebracht wird, wobei eine Längsnaht entsteht und wenn die Schafwolle vor oder während der Umformung angefeuchtet und nach der Umformung getrocknet wird.It is also very advantageous if according to another Embodiment of the invention, the sheep wool at least slightly needled and then in a continuous process a tubular strand is brought together, one Longitudinal seam is created and when the sheep's wool before or during of the forming moistened and after the forming is dried.

Hierbei haben die Fasern bereits vor der Umformung einen Halt untereinander, was bei der Umformung, dem Anfeuchten und dem anschließenden Trocknen noch verstärkt wird.Here, the fibers already have one before the forming Hold to each other, what about forming, moistening and the subsequent drying is intensified.

Als sehr vorteilhaft hat es sich auch erwiesen, wenn erfindungsgemäß während des Herstellungsprozesses eine Außenhülle am rohrförmigen Strang angeordnet wird.It has also proven to be very advantageous if according to the invention during the manufacturing process Outer shell is arranged on the tubular strand.

Diese Außenhülle kann aus verschiedenen Materialien bestehen; es hat sich jedoch als sehr vorteilhaft erwiesen, wenn erfindungsgemäß die Außenhülle ebenfalls aus Schafwolle besteht.This outer shell can be made of different materials consist; however, it has proven very beneficial if according to the invention also the outer shell Sheep wool exists.

Eine vorteilhafte Ausgestaltung des erfindungsgemäßen Verfahrens liegt darin, daß das Verdampfen des Wassers durch ein Erwärmen mit Mikrowellen-Strahlung erfolgt.An advantageous embodiment of the invention The procedure is that the evaporation of the water by heating with microwave radiation.

Bei herkömmlichen Trocknungsverfahren muß auf bis zu 650°C aufgeheizt werden, um ein einigermaßen wirtschaftliches Verdampfen des Wassers zu erzielen. Dabei wird die Schafwolle an der Oberfläche bereits geschädigt. Beim erfindungsgemäßen Einsatz von Mikrowellen-Strahlung zum Verdampfen des Wassers wird die Schafwolle praktisch überhaupt nicht erwärmt und kann dadurch auch nicht geschädigt werden.Conventional drying processes must be up to 650 ° C be heated to a reasonably economical To achieve evaporation of the water. The Sheep wool already damaged on the surface. At the Use of microwave radiation according to the invention for Evaporation of the water makes the sheep's wool practical not warmed at all and therefore can not be harmed.

Als sehr vorteilhaft hat es sich auch erwiesen, wenn erfindungsgemäß die Erwärmung mit Mikrowellen-Strahlung im Durchlaufverfahren erfolgt.It has also proven to be very advantageous if According to the invention, heating with microwave radiation in the Continuous process takes place.

Damit ist ein sehr rationeller Ablauf des Verfahrens gewährleistet. This makes the process very efficient guaranteed.

In der Zeichnung sind zwei unterschiedliche Verfahrensabläufe schematisch dargestellt. Dabei zeigen:

Fig.1
ein Ablaufschema für die Herstellung eines rohrförmigen Isolierstranges aus lose zugeführter Schafwolle und
Fig.2
ein weiteres Ablaufschema der Herstellung eines rohrförmigen Isolierstranges aus einer bahnförmigen, leicht genadelten Schafwolle.
In the drawing, two different process sequences are shown schematically. Show:
Fig. 1
a flow diagram for the production of a tubular insulating strand from loosely fed sheep wool and
Fig. 2
a further flow diagram of the production of a tubular insulating strand from a web-shaped, slightly needled sheep's wool.

Beim Ausführungsbeispiel nach Fig.1 wird lose, vorher kardierte Schafwolle 1 einem Einlauftrichter 2 zugeführt, in dessen Zentrum ein Dorn 3 zum Kalibrieren eines inneren Hohlraumes vorgesehen ist. Darüber hinaus sind Düsen 4 und 5 vorgesehen, mit denen Wasser auf die Schafwolle gesprüht wird.
In dem Einlauftrichter 2 und einer nachfolgenden Leitung 6 wird der Außendurchmesser des entstehenden Rohrstranges zusätzlich kalibriert.In the exemplary embodiment according to FIG. 1, loose, previously carded sheep's wool 1 is fed to an inlet funnel 2, in the center of which a mandrel 3 is provided for calibrating an inner cavity. In addition, nozzles 4 and 5 are provided, with which water is sprayed onto the sheep's wool.
In the inlet funnel 2 and a subsequent line 6, the outside diameter of the pipe string being formed is additionally calibrated.

Nachfolgend ist ein Mikrowellen-Ofen 7 angeordnet, durch welchen der Rohrstrang durchläuft, wobei das vorher eingesprühte Wasser verdampft wird. Dadurch erhalten die Schafwolle-Fasern eine sehr innige Verbindung untereinander obwohl gleichzeitig ein großer Luftanteil zwischen den Fasern verbleibt und damit eine gute Isolierwirkung erzielt wird.A microwave oven 7 is subsequently arranged through which the pipe string goes through, which before sprayed water is evaporated. This gives them Sheep wool fibers form a very intimate connection with one another although at the same time there is a large proportion of air between the Fibers remain and thus achieve a good insulation effect becomes.

Durch das Verdampfen des Wassers mit Hilfe eines Mikrowellen-Ofens, bleiben die Schafwollefasern selbst kalt, da sie von den Mikrowellen nicht beeinflußt werden. Das Wasser wird jedoch sehr schnell erwärmt und verdampft.By evaporating the water with the help of a Microwave oven, the sheep's wool fibers remain themselves cold as they are not affected by the microwaves. However, the water is heated and evaporated very quickly.

Im Anschluß an den Mikrowellen-Ofen 7 ist eine Schlitzeinrichtung 8 vorgesehen, mit welcher die Wandung des Rohrstranges in Längsrichtung aufgetrennt wird, wodurch der Rohrstrang leicht auf Rohrleitungen aufgebracht werden kann. Zweckmäßigerweise ist noch eine Querschneideinrichtung vorgesehen, mit deren Hilfe leicht handhabbare Abschnitte des Rohrstranges abgetrennt werden können.Following the microwave oven 7 is one Slot device 8 is provided with which the wall the pipe string is cut in the longitudinal direction, whereby the pipe string can be easily applied to pipes can. Another is expedient Cross cutting device provided, with the help of which easily manageable sections of the pipe string are separated can.

Beim Ausführungsbeispiel nach Fig.2 wird zuerst eine Außenlage 21 aus Schafwolle-Fasern hergestellt, die verhältnismäßig stark vernadelt wird. Auf diese Außenlage 21 wird dann kardierte Schafwolle 22 lose aufgelegt und in einer Vernadelungsstation 23 insich und mit der Außenlage lose vernadelt. Die so hergestellte schwach verdichtete Bahn 24 wird dann einem Einlauftrichter 25 zugeführt, wo die Bahn 24 um einen Kalibrierdorn 26 herumgelegt und gleichzeitig innen und außen auf die gewünschten Abmessungen kalibriert wird. Die beiden Längsränder der Bahn werden dabei eng aneinander angelegt, so daß eine zwar geschlossen aber leicht zu öffnende Längsnaht entsteht. Unmittelbar vor dem Einlauftrichter 25 sind mehrer Düsen 27, 28 angeordnet, mit denen Wasser auf die Schafwolle-Bahn 24 gesprüht wird, wodurch beim Umformen die Schafwolle-Fasern vernetzt werden. Hinter dem Einlauftrichter 25 und einem nachgeschalteten Formrohr 29 ist ein Mikrowellen-Ofen 30 angeordnet, der als Durchlaufofen ausgebildet ist und der vom im Einlauftrichter gebildeten Rohrstrang kontinuierlich durchlaufen wird. Im Anschluß an diesen Mikrowellen-Ofen ist eine Querschneid-Einrichtung 31 vorgesehen, in welcher der Rohrstrang in einzelne Abschnitte 32 unterteilt wird.In the exemplary embodiment according to FIG. 2, a Outer layer 21 made from sheep's wool fibers relatively needled. On this outside location 21 carded sheep wool 22 is then placed loosely and in a needling station 23 in itself and with the outer layer loosely needled. The weakly compacted so produced Web 24 is then fed to an inlet hopper 25 where the web 24 wrapped around a calibration mandrel 26 and on the inside and outside at the same time Dimensions is calibrated. The two longitudinal edges of the Railway are placed close together, so that one closed but easy to open longitudinal seam. Immediately in front of the inlet funnel 25 are a number of nozzles 27, 28 arranged with which water on the sheep's wool web 24 is sprayed, which causes the sheep's wool fibers during forming be networked. Behind the inlet funnel 25 and a downstream shaping tube 29 is a microwave oven 30 arranged, which is designed as a continuous furnace and the pipe string formed in the inlet funnel is run continuously. Following this Microwave oven is a cross cutting device 31 provided in which the tubing string into individual Sections 32 is divided.

Auch beim Ausführungsbeispiel nach Fig.1 ist das Anbringen einer Außenlage möglich, wozu beispielsweise eine vorgenadelte dünne Bahn gleichzeitig mit den Schafwolle-Fasern in der Einlauftrichter eingeführt wird.The attachment is also in the embodiment according to FIG an outer location possible, for example one pre-needled thin sheet simultaneously with the sheep's wool fibers in the inlet funnel.

Claims (7)

  1. Process to manufacture a sleeve-shaped pipe insulation provided with at least one longitudinal slit, made from fibrous material, wherein, the fibrous material is virgin wool, where the virgin wool is dampend with water and formed into a tubular strip in a feeding hopper, whereupon the water is removed from the tubular strip by evaporation and the strip is possibly provided with a longitudinal slit.
  2. Process according to claim 1, wherein the virgin wool is carded at first, then blown into the feeding hopper, dampend during the moulding process in the feeding hopper and following the moulding process dried and slit longitudinally.
  3. Process according to claim 1, wherein the virgin wool is at least slightly needled and then in a continuous operation joined to a tubular strip, where a longitudinal seam is formed and where the virgin wool ist dampend prior to and during the moulding process and dried after being re-moulded.
  4. Process according to one of the previous claims, wherein during the manufacturing process an outer layer is placed onto the tubular strip.
  5. Process according to claim 4, wherein the outer layer also consists of virgin wool.
  6. Process according to one of the previous claims, wherein the evaporation of the water ist achieved by heating with microwave radiation.
  7. Process according to claim 6, wherein heating with microwave radiation is done in a continuous operation.
EP94116873A 1993-11-08 1994-10-26 Method for producing a shell-like pipe insulation Expired - Lifetime EP0652318B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4338022A DE4338022A1 (en) 1993-11-08 1993-11-08 Process for producing shell-shaped pipe insulation
DE4338022 1993-11-08

Publications (2)

Publication Number Publication Date
EP0652318A1 EP0652318A1 (en) 1995-05-10
EP0652318B1 true EP0652318B1 (en) 1998-01-14

Family

ID=6502023

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94116873A Expired - Lifetime EP0652318B1 (en) 1993-11-08 1994-10-26 Method for producing a shell-like pipe insulation

Country Status (4)

Country Link
EP (1) EP0652318B1 (en)
AT (1) ATE162237T1 (en)
DE (2) DE4338022A1 (en)
FI (1) FI945216A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT406593B (en) * 1998-07-10 2000-06-26 Lehner Alexander Ing Process for thermally insulating a cavity, in particular in a structure
FI120775B (en) * 2005-05-31 2010-02-26 Paroc Oy Ab Method and apparatus for making a mineral wool pipe gutter

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE207056C (en) *
US3147165A (en) * 1959-12-07 1964-09-01 Owens Corning Fiberglass Corp Method of manufacturing pipe insulation
GB1093852A (en) * 1964-01-28 1967-12-06 Commw Scient Ind Res Org Improvements in and relating to the formation and moulding of felt
GB1155737A (en) * 1965-11-15 1969-06-18 Commw Scient Ind Res Org Improved Fibre Preparation for Wad or Felt Manufacture
US4076479A (en) * 1973-02-01 1978-02-28 Fiberglas Canada Ltd. Apparatus for forming articles of fibrous materials

Also Published As

Publication number Publication date
DE4338022A1 (en) 1995-05-11
EP0652318A1 (en) 1995-05-10
FI945216A (en) 1995-05-09
DE59405025D1 (en) 1998-02-19
FI945216A0 (en) 1994-11-07
ATE162237T1 (en) 1998-01-15

Similar Documents

Publication Publication Date Title
DE3011456C2 (en)
EP0277500B1 (en) Method for continuously manufacturing a fibrous insulation web, and apparatus for carrying out the method
DE3008178C2 (en)
DE3339247C1 (en) Method and device for producing crimped fiber pieces from recycled tobacco
DE2704072A1 (en) DEVICE AND METHOD FOR MOLDING PRODUCTS FROM FIBER-SHAPED MATERIAL
CH686785A5 (en) Odour Armer, sound and waermedaemmender Formkoerper and method for its manufacture.
DE2944981A1 (en) MANUFACTURING METHOD FOR ROD-SHAPED FIBER BUNCH ELEMENTS
EP0243574B1 (en) Heat exchanger and method of producing heat exchangers
DE2509121C3 (en) Method for manufacturing tobacco smoke filters and apparatus for carrying out the method
DE1602676A1 (en) Method and device for forming metal objects from billets
EP0243575B1 (en) Heat and/or mass exchanger, and method of producing a heat and/or mass exchanger
DE1028926B (en) Filter element for tobacco smoke
DE2443056C3 (en) Device for heating a bundle of fibers
DE102005026656A1 (en) Production of a mineral fiber web with largely upright mineral fibers and use of the resulting waste
DE3601959C2 (en)
CH671862A5 (en)
EP0652318B1 (en) Method for producing a shell-like pipe insulation
CH637610A5 (en) METHOD AND DEVICE FOR PRODUCING MOLDED BODIES FROM A HYDRAULICALLY BONDED MATERIAL.
DE2541655C3 (en) Method and apparatus for making elongated smoke filters
DE2936490A1 (en) METHOD FOR PRODUCING A FIBER-SHAPED OBJECT
DE1931137B2 (en) RESTORED CIGARETTE FILTER AND METHOD OF ITS MANUFACTURING
DE102016121175A1 (en) Rod-shaped smoking article and device for its production
DE2155667B2 (en) Cross-flow filter and method and device for its manufacture
DE3304809A1 (en) MOLDED PART FROM BINDER-PROVIDED MINERAL FIBERS FOR SOUND-ABSORBING COVERING A PERFORATED EXHAUST PIPE, AND METHOD FOR THE PRODUCTION THEREOF
DE2409023A1 (en) FILTER FOR TOBACCO SMOKE

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE

RAX Requested extension states of the european patent have changed

Free format text: LT PAYMENT 941026;SI PAYMENT 941026

17P Request for examination filed

Effective date: 19950519

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

17Q First examination report despatched

Effective date: 19970325

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

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 DK ES FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: LT PAYMENT 941026;SI PAYMENT 941026

LTIE Lt: invalidation of european patent or patent extension
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 FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19980114

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;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: 19980114

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19980114

Ref country code: GB

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19980114

Ref country code: FR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19980114

Ref country code: ES

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

Effective date: 19980114

REF Corresponds to:

Ref document number: 162237

Country of ref document: AT

Date of ref document: 19980115

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 59405025

Country of ref document: DE

Date of ref document: 19980219

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: WERNER BRUDERER PATENTANWALT

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 FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19980414

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19980414

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19980414

EN Fr: translation not filed
REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: 78367

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

Effective date: 19980114

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

Ref country code: IE

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

Effective date: 19980824

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

Ref document number: 78367

Country of ref document: IE

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

Ref country code: LU

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

Effective date: 19981026

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

Ref country code: BE

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

Effective date: 19981031

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
BERE Be: lapsed

Owner name: DOPPELMAYER FRITZ

Effective date: 19981031

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

Ref country code: MC

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

Effective date: 19990430

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

Ref country code: AT

Payment date: 20021003

Year of fee payment: 9

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

Ref country code: CH

Payment date: 20021014

Year of fee payment: 9

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

Ref country code: DE

Payment date: 20021226

Year of fee payment: 9

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: 20031026

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: 20031031

Ref country code: CH

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

Effective date: 20031031

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: 20040501

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL