DE2613782A1 - Armoured plastics hoses - with outer wall of extruded hose wound with tape under tension to embed tape in hose wall which is smoothed over whilst supported internally - Google Patents

Armoured plastics hoses - with outer wall of extruded hose wound with tape under tension to embed tape in hose wall which is smoothed over whilst supported internally

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Publication number
DE2613782A1
DE2613782A1 DE19762613782 DE2613782A DE2613782A1 DE 2613782 A1 DE2613782 A1 DE 2613782A1 DE 19762613782 DE19762613782 DE 19762613782 DE 2613782 A DE2613782 A DE 2613782A DE 2613782 A1 DE2613782 A1 DE 2613782A1
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Germany
Prior art keywords
wall
tape
hose
pipe
cooling
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.)
Withdrawn
Application number
DE19762613782
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German (de)
Inventor
Erich Oprach
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Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE19762613782 priority Critical patent/DE2613782A1/en
Publication of DE2613782A1 publication Critical patent/DE2613782A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/82—Forcing wires, nets or the like partially or completely into the surface of an article, e.g. by cutting and pressing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B29C48/151—Coating hollow articles
    • B29C48/152—Coating hollow articles the inner surfaces thereof
    • B29C48/153—Coating both inner and outer surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • B29C48/901—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • B29C48/908—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article characterised by calibrator surface, e.g. structure or holes for lubrication, cooling or venting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • B29C48/904—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article using dry calibration, i.e. no quenching tank, e.g. with water spray for cooling or lubrication
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/22—Tubes or pipes, i.e. rigid

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

Armoured plastics hoses are produced by treating the extruded tubular member on the inner and outer walls by means of cooling and calibrating devices. Extruded plastics hose is reinforced with an armouring tape which is wound helically and under tension about the outer wall. The thus embedded tape is totally enclosed by smoothing over any channels or grooves, whilst simultaneously the inner wall of the hose is supported and cooled by a cushion of water passed through the hose in the direction of its movement. Hoses have thinner walls whilst their strength remains unimpaired.

Description

Verfahren und Vorrichtung zur Herstellung armierter Method and device for the production of armored

Druckrohre aus thermoplastischen Kunststoffen Die vorliegende Erfindung bezieht sich auf ein Verfahren und eine zugehörige Vorrichtung zur Herstellung von Hohlsträngen, insbesondere Rohren, aus thermoplastischem Kunststoff, bei gleichzeitigem Kühlen und Kalibrieren der so extrudierten Hohlkörper mittels dem Spritzkopf nachgeordneten Kalibrier-und Kühleinrichtungen, sowohl auf der Außen- wie Innenseite der Rohrwandung, nach Patent....( Patentanmeldung P 26 10 972.8 ). Thermoplastic Pressure Pipes The present invention relates to a method and an associated apparatus for the production of Hollow strands, in particular pipes, made of thermoplastic material, at the same time Cooling and calibration of the hollow body extruded in this way by means of the extrusion head is arranged downstream Calibration and cooling devices, both on the outside and inside of the pipe wall, according to patent .... (patent application P 26 10 972.8).

Insbesondere bei der Herstellung von Druckrohren mit relativ großer Nennweite ist zur Vermeidung der aus entsprechend dick zu dimensionierenden Rohrwandungen resultierenden nachteile, erfindungsgemäß vorgesehen, diese mit einer Armierung aus zugfesten Fäden, Bändern o.dgl. eines beliebigen Materials zu versehen, die es möglich macht, die Rohrwandstärken von der Kunststoffseite her dünner zu gestalten und zugleich Rohre exakter Form und hoher Haltbarkeit zu fertigen.Especially in the manufacture of pressure pipes with a relatively large The nominal width is to avoid the pipe walls that are to be dimensioned accordingly thick resulting disadvantages, provided according to the invention, this with a reinforcement from tensile threads, tapes or the like. of any material to provide the makes it possible to make the pipe wall thicknesses thinner from the plastic side and at the same time to manufacture pipes with an exact shape and high durability.

Gelöst wird diese Aufgabe gemäß dem erfindungsgemäßen Verfahrens durch Umwickeln des den Spritzkopf verlassenden plastischen Eiohrkörpers auf der äußeren Mantelfläche mittels eines unter Zugspannung stehenden Armierungsbandes o.dgl., Verschließen und Glätten der durch das eingedrungene Armierungsband in der noch plastischen Rohroberfläche in Umfangsrichtung entstandenen Kanäle unter gleichzeitigem Stützen und Abkühlen der gegenüberliegenden Rohrinnenwand mittels eines in Arbeitsrichtung strömenden Druckwasserpolsters.This object is achieved according to the method according to the invention Wrapping of the plastic ear body leaving the spray head on the outer Outer surface by means of a reinforcing tape or the like under tensile stress, Sealing and smoothing of the reinforcement tape that has penetrated into the still plastic pipe surface in the circumferential direction created channels under the same time Support and cooling of the opposite inner wall of the pipe by means of one in the working direction flowing pressure water cushion.

Weitere Merkmale der Erfindung, insbesondere bezüglich der Ausgestaltung der Vorrichtungsmerkmale zur Verfahrensdurchführung sind den Unteransprüchen zu entnehmen, sowie in der Zeichnungsbeschreibung näher ausgeführt.Further features of the invention, in particular with regard to the design the device features for carrying out the method are to the subclaims and detailed in the description of the drawing.

Es zeigen: Fig. 1 eine Prinzipskizze der erfindungsgemäßen Gesamtanlage und Fig. 2 den eigentlichen Vorrichtungsteil im Querschnitt einer Hälfte dargestellt.The figures show: FIG. 1 a schematic diagram of the overall system according to the invention and FIG. 2 shows the actual device part in cross section of one half.

Die Prinzipskizze nach Fig. 1 zeigt, schematisch angedeutet, eine Anlage zur Herstellung thermoplastischer Kunststoffrohre nach der Patentanmeldung P 26 10 972.8, wobei dem Extrusionsteil 1 mit anschließendem Spritzkopf 2, 2a eine an sich bekannte, doppelseitige Wickelstation 3, 3a zum Umwickeln des den Spritzkopf 2 verlassenden, noch plastischen Teiles 4a des Rohres 4 mittels eines Armierungsbandes 5, 5a, o.dgl. durch den Wickelspalt 22 hindurch nachgeordnet ist. Das Rohr 4 selbst wird anschließend in ebenfalls bekannter und daher nicht näher dargestellter Weise, in einer auf einem Maschinengestell 6 verankerten Abzugs- und Führungsvorrichtung 7, 7a abgeführt, Unmittelbar der Umwickelstelle 4a nachgeordnet ist die eigentliche Kalibrier- und Verfestigungsstation 8 für den dort noch plastischen Rohrkörper 4. Diese Station 8 besteht dabei, wie als Vergrößerung von Ausschnitt A aus Fig. 2 ebenfalls im Prinzip, für die Rohroberseite 4b ersichtlich ist, zunächst aus einer, die Glättung der durch die eingedrungenen Armierungsbänder 5, 5a entstandenen Oberflächenvertiefungen 9 bzw. Aufwerfungen 10 bewirkenden Kalibrierung 11, 11a, mit eingesetzter Heizvorrichtung 12. Nachgeordnet ist eine, über die wärmeisolierende Schicht 13 mit Aussparung 14 zur Vermeidung von Wärmebrücken, angeschlossene Kühlvorrichtung 15, 15a durch deren Ringraum 16 über eine von außen kommende, nicht gezeigte Zuleitung, Kühlwasser 17 dem Ringspalt 18 zugeführt wird. Eine Art Lippendichtung 19, gehalten über den Ring 20 und Teil 7 begrenzt den Wasserspalt 18. Zwischen diesen Teilen liegt noch eine Vakuumstelle 21, 21a, als zusätzliche Rohrkalibrierung, bzw. Abdichtung des Kühlwasserraumes 18 gegen das beheizte Teil 11, 11a.The schematic diagram according to FIG. 1 shows, indicated schematically, a Plant for the production of thermoplastic pipes according to the patent application P 26 10 972.8, the extrusion part 1 with a subsequent injection head 2, 2a known, double-sided winding station 3, 3a for winding around the spray head 2 leaving, still plastic part 4a of the pipe 4 by means of a reinforcement tape 5, 5a, or the like. is arranged downstream through the winding gap 22. The pipe 4 itself is then also known and therefore not shown in more detail, in a trigger and guide device anchored on a machine frame 6 7, 7a carried away, directly downstream of the wrapping point 4a is the actual one Calibration and solidification station 8 for the pipe body 4, which is still plastic there. This station 8 consists, as an enlargement of section A from FIG. 2 also in principle, for which the upper side of the pipe 4b can be seen, initially from a, the smoothing of the surface depressions created by the penetrated reinforcement tapes 5, 5a 9 or elevations 10 effecting calibration 11, 11a, with inserted heating device 12. Downstream is one over the heat-insulating layer 13 with a recess 14 to avoid thermal bridges, connected cooling device 15, 15a through their Annular space 16 via a supply line (not shown) coming from the outside, cooling water 17 the annular gap 18 is fed. A type of lip seal 19 held over the ring 20 and part 7 delimits the water gap 18. There is another one between these parts Vacuum point 21, 21a, as additional pipe calibration or sealing of the cooling water space 18 against the heated part 11, 11a.

Auf der Rohrinnenseite 4c schließt sich an den Dornteil 2a und den, Wärmebrücken verhindernden Luftspalt 23, über die zusätzliche Isolierschicht 24 und das Kalibrierteil 24a das Teil 25 an, in welchem über den Zuführkanal 26 und den Ableitkanal 27 durch die Engstelle 28 ein Stütz- und Kühlwasserpolster 29 über der Aussparung 30 aufgebaut und gehalten wird, das zur Verfestigung und Abstützung des dort noch plastischen Rohrteiles 4a dient, und somit den Glätteeffekt der Teile 11 bis 15 durch Andruck an diese unterstützt bzw. überhaupt ermöglicht. Zu- bzw. Abfuhr dieses Stützwassers 29 sowie des weiteren, aus dem Ringkanal 34 zwischen den Teilen 31 und 32 zugeführten Kiihlwassers 33 erfolgen durch das Mehrkammerrohr 35, das in seinem prinzipiellen Aufbau dem der Hauptanmeldung entspricht. Anstelle dieses Mehrkammerrohres können bei entsprechend großen Rohrnennweiten auch mehrere Einzelrohre als Medienleitungen vorgesehen sein. Begrenzt nach außen wird die gesamte Einrichtung durch die über Ringteile 20, 36 gehaltenen Lippendichtungen 19, 38, die gemäß 19a axial beweglich und somit dem Produktionsprozeß anpaßbar sind.On the inside of the pipe 4c, the mandrel part 2a and the, Air gap 23 which prevents thermal bridges additional insulating layer 24 and the calibration part 24a the part 25 in which via the feed channel 26 and the discharge channel 27 through the constriction 28 a support and cooling water cushion 29 is built up and held over the recess 30, for solidification and support of the pipe part 4a which is still plastic there is used, and thus the smoothness effect of the parts 11 to 15 supported or made possible at all by pressing against them. Access or Discharge of this supporting water 29 as well as further, from the annular channel 34 between the parts 31 and 32 supplied cooling water 33 take place through the multi-chamber tube 35, which in its basic structure corresponds to that of the main application. Instead of this multi-chamber pipe can also be several with correspondingly large pipe sizes Individual pipes can be provided as media lines. The whole is limited to the outside Device through the lip seals 19, 38 held by ring parts 20, 36, which are axially movable according to 19a and thus adaptable to the production process.

Um noch die Stärke des Ausgangsmaterials dem Volumen anzupassen, das die Armierungen 5, 5a beanspruchen, ist das Maß "y" etwa um den Betrag "2x" im Durchmesser kleiner gehalten als der Außendurchmesser des fertigen Rohres. Leerseite teIn order to adapt the strength of the starting material to the volume that the reinforcements 5, 5a claim, the dimension "y" is about the amount "2x" in diameter kept smaller than the outer diameter of the finished pipe. Blank page te

Claims (5)

Patentansprüche /1. Verfahren zur Herstellung von wandungsarmierten Rohren o.ä. o.ä. Hohlsträngen aus thermoplastischen Kunststoffen, unter Nachbehandlung des extrudierten Hohlstranges auf der inneren und äußeren Mantelseite mittels dem opritzkopf nachgeordneten Kühl- und Kalibriereinrichtungen, gemäß Patent....( Patentanmeldung B 26 10 972.8 ), gekennzeichnet durch Umwickeln des den Spritzkopf verlassenden plastischen rcohrkörpers auf der äußeren Manteiflache mittels eines unter Zugspannung stehenden Armierungsbandes o.dgl., Verschließen und Glätten der durch das eingedrungene Armierungsband in der noch plastischen kohroberfläche in Umfangsrichtung entstandenen Kanäle unter gleichzeitigem Stützen und Abkühlen der gegenüberliegenden Rohres innenwand mittels eines in Arbeitsrichtung strömenden Drusekwasserpolsters. Claims / 1. Process for the production of wall-reinforced Pipes or similar or similar hollow strands made of thermoplastic plastics, with post-treatment of the extruded hollow strand on the inner and outer shell side by means of the Cooling and calibration devices downstream of the spray head, according to patent .... (patent application B 26 10 972.8), characterized by wrapping around the one leaving the spray head plastic tubular body on the outer shell surface by means of a tensile stress-reliever standing reinforcement tape or the like. Closing and smoothing of the penetrated Reinforcement tape in the still plastic carbon surface in the circumferential direction Channels with simultaneous support and cooling of the opposite pipe inner wall by means of a Drusek water cushion flowing in the working direction. 2. Vorrichtung zur Durchführung des Verfahrens nach Anspruch 1, dadurch gekennzeichnet, daß im Bereich des Rohraußenmantels ( 4b ) unmittelbar an das Spritzkopfende ( 2, 2a ) ein hickelspalt ( 22 ) für die Armierung ( 5, 5a ) anschließt, mit nachgeordnetem, beheizten Glätteelement ( 11, Ila, 12 ) zum Glätten und Verschließen der Unregelmäigkeiten ( 9 10) in der armierten Rohroberfläche ( 4b ). 2. Apparatus for performing the method according to claim 1, characterized characterized in that in the area of the pipe outer jacket (4b) directly to the end of the spray head (2, 2a) a wrapping gap (22) for the reinforcement (5, 5a) is connected, with a downstream, heated smoothing element (11, Ila, 12) for smoothing and closing the irregularities (9 10) in the reinforced pipe surface (4b). 3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, da an die auf der Rohraußenseite ( 4b ) liegenden Glätteteile ( 11, Ila, 12 ) eine Vakuumdichtung ( 21, 21a ) mit nachgeschaltetem Kühlwasserpolster ( 15 bis 18 ) anschließt.3. Apparatus according to claim 2, characterized in that the on the outside of the pipe (4b) lying smooth parts (11, Ila, 12) a vacuum seal (21, 21a) followed by a cooling water cushion (15 to 18). 4. Vorrichtung nach den Ansprüchen 2 und 3, dadurch gekennzeichnet, daß das Dorninnenteil ( 2a ) mindestens um ein dem Durchmesser eines Armierungsfadens ( 5, 5a ) entsprechendes dbermaß ( z ) gegenüber dem Spritzkopfende ( 2 ) in axialer Richtung vorgezogen und diesem innenseitig ( 4c ) ein stützendes Druckwasserpolster ( 25 bis 30 ) nachgeordnet ist.4. Device according to claims 2 and 3, characterized in that that the mandrel inner part (2a) at least by the diameter of a reinforcing thread (5, 5a) corresponding oversize (z) relative to the extrusion head end (2) in the axial direction Direction preferred and this inside (4c) a supporting pressure water cushion (25 to 30) is subordinate. 5. Vorrichtung nach den Ansprüchen 2 bis 4, dadurch gekennzeichnet, daß an das Druckwasserpolster ( 25 bis 30 ) eine über eine Zwischenplatte ( 31 ) gegenüber letzterem begrenzte Kühlstrecke ( 33, 34 ) anschließt.5. Device according to claims 2 to 4, characterized in that that to the pressurized water cushion (25 to 30) an intermediate plate (31) compared to the latter, limited cooling path (33, 34) is connected.
DE19762613782 1976-03-31 1976-03-31 Armoured plastics hoses - with outer wall of extruded hose wound with tape under tension to embed tape in hose wall which is smoothed over whilst supported internally Withdrawn DE2613782A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19762613782 DE2613782A1 (en) 1976-03-31 1976-03-31 Armoured plastics hoses - with outer wall of extruded hose wound with tape under tension to embed tape in hose wall which is smoothed over whilst supported internally

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762613782 DE2613782A1 (en) 1976-03-31 1976-03-31 Armoured plastics hoses - with outer wall of extruded hose wound with tape under tension to embed tape in hose wall which is smoothed over whilst supported internally

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DE2613782A1 true DE2613782A1 (en) 1977-10-13

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0380543A1 (en) * 1986-03-31 1990-08-08 Warren R Burnham Method of making a catheter or tube.
EP0382891A2 (en) * 1989-02-16 1990-08-22 Firma Carl Freudenberg Method of manufacturing a fibre-reinforced extruded rubber article
WO1991000798A1 (en) * 1989-07-13 1991-01-24 Prosyma Research Limited Finishing process for extruded profiles
EP0453647A2 (en) * 1990-04-27 1991-10-30 REHAU AG + Co Method of manufacturing profiled elements
US5335410A (en) * 1993-03-15 1994-08-09 Burnham Warren R Method of making ultra small diameter catheters and of reinforced tubular product
US5792401A (en) * 1983-12-12 1998-08-11 Burnham; Warren R. Method for making a tubular product

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5792401A (en) * 1983-12-12 1998-08-11 Burnham; Warren R. Method for making a tubular product
EP0380543A1 (en) * 1986-03-31 1990-08-08 Warren R Burnham Method of making a catheter or tube.
EP0380543A4 (en) * 1986-03-31 1990-10-24 Warren R. Burnham Method of making a catheter or tube
EP0382891A2 (en) * 1989-02-16 1990-08-22 Firma Carl Freudenberg Method of manufacturing a fibre-reinforced extruded rubber article
EP0382891A3 (en) * 1989-02-16 1991-03-27 Firma Carl Freudenberg Method of manufacturing a fibre-reinforced extruded rubber article
WO1991000798A1 (en) * 1989-07-13 1991-01-24 Prosyma Research Limited Finishing process for extruded profiles
EP0453647A2 (en) * 1990-04-27 1991-10-30 REHAU AG + Co Method of manufacturing profiled elements
EP0453647A3 (en) * 1990-04-27 1992-01-22 Rehau Ag + Co Method of manufacturing profiled elements
US5335410A (en) * 1993-03-15 1994-08-09 Burnham Warren R Method of making ultra small diameter catheters and of reinforced tubular product
WO1994021420A1 (en) * 1993-03-15 1994-09-29 Burnham Warren R Method and apparatus for small catheters and reinforced tubular product

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