EP0612080A2 - Manufacturing process of a coaxial cable - Google Patents
Manufacturing process of a coaxial cable Download PDFInfo
- Publication number
- EP0612080A2 EP0612080A2 EP94101678A EP94101678A EP0612080A2 EP 0612080 A2 EP0612080 A2 EP 0612080A2 EP 94101678 A EP94101678 A EP 94101678A EP 94101678 A EP94101678 A EP 94101678A EP 0612080 A2 EP0612080 A2 EP 0612080A2
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- European Patent Office
- Prior art keywords
- dielectric layer
- copolymer
- layer
- welding
- welded
- 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.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/26—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping
- H01B13/2613—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping by longitudinal lapping
- H01B13/2633—Bending and welding of a metallic screen
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/26—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping
- H01B13/2613—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping by longitudinal lapping
- H01B13/2693—After-treatment
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49123—Co-axial cable
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/53—Means to assemble or disassemble
- Y10T29/53126—Means to place sheath on running-length core
Definitions
- the invention relates to a method for producing a coaxial cable, in which a dielectric layer is extruded onto a continuously supplied inner conductor, around which insulated conductor thus formed a longitudinal metal strip is formed into a slotted tube and welded on its longitudinal edges, and the welded tube onto the surface of the dielectric layer is pulled down.
- a coaxial cable is known from US Pat. No. 3,315,025, in which the outer conductor consists of a copolymer-coated aluminum strip.
- the aluminum strip is laid around the dielectric layer made of foam with the strip edges overlapping one another, the copolymer layer pointing outwards.
- a relatively thick outer sheath made of plastic is extruded onto the outer conductor, the wall thickness of which is between 1 and 3 mm.
- the copolymer layer is activated and ensures a good adhesive bond between the outer conductor and the outer sheath.
- the overlapping tape edges are glued.
- the disadvantage of this cable is that the outer conductor does not form a self-contained sheath and therefore energy can escape through the slot located between the overlapping band edges. This is all the more so when the overlap seam tears open due to the action of elevated temperature. Since plastics have a coefficient of expansion that is higher by a factor of 10 than metals, it is to be feared that with a longer-term temperature influence of e.g. B. 50 ° C the adhesive seam bursts. Another disadvantage is the fact that the overlap is visible on the surface of the jacket. With this known cable too, a longitudinal migration of water along the cable cannot be avoided.
- the present invention has for its object to improve the aforementioned cable in such a way that a metal band with a smaller wall thickness can be used. It should be ensured that the cable produced has no radiation losses, but the outer conductor is glued either to the dielectric or to the outer jacket.
- This object is achieved in that a metal strip provided with a plastic layer on at least one of its surfaces is used, and the longitudinal edges are welded by laser welding.
- a focused laser beam is used for welding with particular advantage.
- the energy is concentrated on one point (focal point), whereas there are significantly lower energy densities in front of and behind the focal point, so that there is no impairment of the dielectric layer.
- a plastic outer jacket is expediently extruded onto it, which is intended to protect the thin-walled, mechanically unstable outer conductor from damage.
- a particularly advantageous embodiment is achieved if an aluminum strip with a one-sided coating is formed around the dielectric layer in such a way that the copolymer coating faces the dielectric layer.
- the copolymer layer is activated and causes an intimate bond between the dielectric layer and the outer conductor.
- the main advantage of this solution is that the cable produced is absolutely longitudinally watertight.
- the structure is very stable. Because the thin-walled outer conductor is glued to both the dielectric layer and the outer jacket, there is no tearing when the cable is bent at the usual bending radii.
- An aluminum strip with a wall thickness of 0.15 to 0.25 mm and a layer thickness of the copolymer of 0.02 to 0.06 mm is used with particular advantage.
- Vapors generated during the welding process are expediently extracted. This prevents the laser lens from becoming dirty.
- copolymer tape made of a copolymer into the still open slot tube in such a way that it comes to rest below the weld seam.
- This copolymer tape is intended to replace the copolymer layer in the weld area destroyed by laser welding.
- the width of the copolymer strip or copolymer strip depends on the width of the destroyed copolymer coating of the metal strip.
- the tape or strip is expediently somewhat wider than the destroyed layer.
- FIG. 1 shows a so-called CATV cable (Cable Antenna Television) and FIG. 2 shows an illustration of the method according to the invention.
- the cable shown in Fig. 1 has an inner conductor 1 made of copper or an aluminum wire covered with copper, a dielectric layer 2 made of, for example, foamed polyethylene, an outer conductor 3 made of aluminum and an outer jacket 5 made of z. B. polyethylene.
- the outer conductor 3 consists of an aluminum strip 3 a, which has a copolymer layer 3 b.
- the tubular outer conductor 3 is formed from the copolymer-coated aluminum strip 3 a, 3 b by a weld 4.
- the outer conductor 3 is glued to the dielectric layer 2 via the copolymer layer 3 b. It is also advantageous to glue the inner conductor 1 to the dielectric layer 2, so that a longitudinally watertight cable is produced. Adhesion between the outer conductor 4 and the outer jacket 5 can be advantageous for some applications, but is not necessary for electrical reasons.
- the manufacture of such a cable will be explained in more detail with reference to FIG. 2.
- the inner conductor 1 provided with the dielectric layer 2 is continuously drawn off from a storage drum 6 and encased by the copolymer-coated aluminum strip 3 a, 3 b drawn off from a storage spool 7.
- the copolymer-coated aluminum strip 3 a, 3 b is around the dielectric layer 2 to a tube with a larger diameter, i.e. H. made with a gap.
- the slot of the tube is continuously welded by means of a laser welding device 8. During the welding of the tube forming the outer conductor 3, the copolymer layer 3 b located on the inner surface of the tube is destroyed at least in the area of the weld 4.
- a strip 9 of a copolymer is drawn off from a supply spool 10 and placed on the dielectric layer 2, so that the strip lies below the weld 4.
- the vapors generated during the combustion of the copolymer layer 3 b are removed by a suction device 11.
- the welded tube is then pulled down through a die 12 onto the surface of the dielectric layer 2, which is thereby slightly compressed.
- the outer sheath 5 is extruded onto the outer conductor 3 by means of an udder 13.
- the extrusion heat activates the copolymer layer 3 b and glues the dielectric layer 2 to the aluminum layer 3 a.
- the copolymer strip 9 melts and "repairs" the weld 4 from below.
- the finished cable is then z. B. wound on a drum 14.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Manufacturing Of Electric Cables (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Laser Beam Processing (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Herstellung eines Koaxialkabels, bei welchem auf einen kontinuierlich zugeführten Innenleiter eine dielektrische Schicht aufextrudiert wird, um diesen so gebildeten isolierten Leiter ein längseinlaufendes Metallband zum Schlitzrohr geformt und an seinen Längskanten verschweißt wird, und das geschweißte Rohr auf die Oberfläche der dielektrischen Schicht heruntergezogen wird.The invention relates to a method for producing a coaxial cable, in which a dielectric layer is extruded onto a continuously supplied inner conductor, around which insulated conductor thus formed a longitudinal metal strip is formed into a slotted tube and welded on its longitudinal edges, and the welded tube onto the surface of the dielectric layer is pulled down.
Aus der DE-OS 16 40 194 ist ein Verfahren zur Herstellung eines Koaxialkabels bekannt, bei welchem um einen schaumstoffisolierten Leiter ein Aluminiumband zu einem Rohr mit einem größeren Durchmesser herumgeformt, längsnahtverschweißt und auf die Schaumstoffschicht heruntergezogen wird. Zum Verschweißen der Längskanten des Rohres wird ein Schweißbrenner verwendet. Der Vorteil eines nach diesem Verfahren hergestellten Kabels ist darin zu sehen, daß wegen des völlig geschlossenen Außenleiters Abstrahlungsverluste nicht zu befürchten sind. Nachteilig ist, daß sich Wasser in dem Ringspalt zwischen dem Dielektrikum und dem Außenleiter ausbreiten kann und sich dadurch die Übertragungseigenschaften des Kabels verschlechtern. Ein solcher Spalt ist nicht auszuschließen, obwohl beim Herunterziehen des Außenleiters das Dielektrikum geringfügig komprimiert wird.From DE-OS 16 40 194 a method for producing a coaxial cable is known, in which an aluminum strip is formed around a foam-insulated conductor into a tube with a larger diameter, welded longitudinally and pulled down onto the foam layer. A welding torch is used to weld the longitudinal edges of the pipe. The advantage of a cable manufactured by this method is that radiation losses are not to be feared because of the completely closed outer conductor. It is disadvantageous that water can spread in the annular gap between the dielectric and the outer conductor and the transmission properties of the cable deteriorate as a result. Such a gap cannot be excluded, although the dielectric is slightly compressed when the outer conductor is pulled down.
Aus der US-PS 3,315,025 ist ein Koaxialkabel bekannt, bei welchem der Außenleiter aus einem copolymerbeschichteten Aluminiumband besteht. Das Aluminiumband ist mit einander überlappenden Bandkanten um die aus Schaumstoff bestehende dielektrische Schicht herumgelegt, wobei die Copolymerschicht nach außen weist. Auf den Außenleiter wird noch ein relativ dicker Außenmantel aus Kunststoff extrudiert, dessen Wanddicke zwischen 1 und 3 mm liegt. Bei der Extrusion des Außenmantels wird die Copolymerschicht aktiviert und sorgt für eine gute Klebeverbindung zwischen dem Außenleiter und dem Außenmantel. Gleichzeitig werden die überlappenden Bandkanten verklebt. Nachteilig bei diesem Kabel ist, daß der Außenleiter keine in sich geschlossene Hülle bildet und deshalb Energie durch den zwischen den überlappenden Bandkanten befindlichen Schlitz entweichen kann. Dies um so mehr, wenn durch Einwirkung von erhöhter Temperatur die Überlappungsnaht aufreißt. Da Kunststoffe einen um den Faktor 10 höheren Ausdehnungskoeffizienten aufweisen als Metalle, ist zu befürchten, daß bei einer längerfristigen Temperatureinwirkung von z. B. 50 °C die Klebenaht aufplatzt. Ein weiterer Nachteil ist darin zu sehen, daß sich die Überlappnaht auf der Manteloberfläche abzeichnet. Auch bei diesem bekannten Kabel ist eine Längswanderung von Wasser entlang dem Kabel nicht zu vermeiden.A coaxial cable is known from US Pat. No. 3,315,025, in which the outer conductor consists of a copolymer-coated aluminum strip. The aluminum strip is laid around the dielectric layer made of foam with the strip edges overlapping one another, the copolymer layer pointing outwards. A relatively thick outer sheath made of plastic is extruded onto the outer conductor, the wall thickness of which is between 1 and 3 mm. When the outer sheath is extruded, the copolymer layer is activated and ensures a good adhesive bond between the outer conductor and the outer sheath. At the same time, the overlapping tape edges are glued. The disadvantage of this cable is that the outer conductor does not form a self-contained sheath and therefore energy can escape through the slot located between the overlapping band edges. This is all the more so when the overlap seam tears open due to the action of elevated temperature. Since plastics have a coefficient of expansion that is higher by a factor of 10 than metals, it is to be feared that with a longer-term temperature influence of e.g. B. 50 ° C the adhesive seam bursts. Another disadvantage is the fact that the overlap is visible on the surface of the jacket. With this known cable too, a longitudinal migration of water along the cable cannot be avoided.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, das eingangs erwähnte Kabel dahingehend zu verbessern, daß ein Metallband mit einer geringeren Wanddicke verwendet werden kann. Dabei soll gewährleistet sein, daß das hergestellte Kabel keine Abstrahlungsverluste aufweist, jedoch eine Verklebung des Außenleiters entweder mit dem Dielektrikum oder mit dem Außenmantel verwirklicht wird.The present invention has for its object to improve the aforementioned cable in such a way that a metal band with a smaller wall thickness can be used. It should be ensured that the cable produced has no radiation losses, but the outer conductor is glued either to the dielectric or to the outer jacket.
Diese Aufgabe wird dadurch gelöst, daß ein zumindest auf einer seiner Oberflächen mit einer Kunststoffschicht versehenes Metallband verwendet wird, und das Verschweißen der Längskanten durch Laserschweißen vorgenommen wird.This object is achieved in that a metal strip provided with a plastic layer on at least one of its surfaces is used, and the longitudinal edges are welded by laser welding.
Völlig überraschend hat sich gezeigt, daß die an dem Metallband haftende Kunststoffschicht keinen schädlichen Einfluß auf das Schweißverfahren und auf die Qualität der Schweißnaht hat. Durch die Kunststoffschicht kann die Wanddicke des Außenleiters herabgesetzt werden, was unter Umständen zu einer Kostenersparnis führt.Completely surprisingly, it has been shown that the plastic layer adhering to the metal strip has no harmful influence on the welding process and on the quality of the weld seam. The wall thickness of the outer conductor can be reduced by the plastic layer, which under certain circumstances leads to cost savings.
Mit besonderem Vorteil wird ein fokussierter Laserstrahl für das Schweißen verwendet. Bei einem solchen Laserstrahl wird die Energie auf einen Punkt (Brennpunkt) konzentriert, wogegen vor und hinter dem Brennpunkt wesentlich geringere Energiedichten vorhanden sind, so daß eine Beeinträchtigung der dielektrischen Schicht nicht auftritt.A focused laser beam is used for welding with particular advantage. With such a laser beam, the energy is concentrated on one point (focal point), whereas there are significantly lower energy densities in front of and behind the focal point, so that there is no impairment of the dielectric layer.
Nach dem Herunterziehen des geschweißten Rohres wird zweckmäßigerweise auf dieses ein Kunststoffaußenmantel aufextrudiert, der den dünnwandigen, mechanisch wenig stabilen Außenleiter vor Beschädigung schützen soll.After pulling down the welded tube, a plastic outer jacket is expediently extruded onto it, which is intended to protect the thin-walled, mechanically unstable outer conductor from damage.
Zu einer besonders vorteilhaften Ausgestaltung gelangt man, wenn ein Aluminiumband mit einer einseitigen Beschichtung derart um die dielektrische Schicht herumgeformt wird, daß die Copolymerbeschichtung der dielektrischen Schicht zugekehrt ist. Bei der nachfolgenden Extrusion des Außenmantels wird die Copolymerschicht aktiviert und bewirkt eine innige Verklebung zwischen der dielektrischen Schicht und dem Außenleiter. Der wesentliche Vorteil dieser Lösung besteht darin, daß das hergestellte Kabel absolut längswasserdicht ist. Darüber hinaus ist der Aufbau sehr stabil. Wegen der Verklebung des dünnwandigen Außenleiters sowohl mit der dielektrischen Schicht als auch mit dem Außenmantel, kommt es beim Biegen des Kabels bei den üblichen Biegeradien nicht zu einem Einreißen. Mit besonderem Vorteil wird ein Aluminiumband mit einer Wanddicke von 0,15 bis 0,25 mm und einer Schichtdicke des Copolymers von 0,02 bis 0,06 mm verwendet.A particularly advantageous embodiment is achieved if an aluminum strip with a one-sided coating is formed around the dielectric layer in such a way that the copolymer coating faces the dielectric layer. During the subsequent extrusion of the outer sheath, the copolymer layer is activated and causes an intimate bond between the dielectric layer and the outer conductor. The main advantage of this solution is that the cable produced is absolutely longitudinally watertight. In addition, the structure is very stable. Because the thin-walled outer conductor is glued to both the dielectric layer and the outer jacket, there is no tearing when the cable is bent at the usual bending radii. An aluminum strip with a wall thickness of 0.15 to 0.25 mm and a layer thickness of the copolymer of 0.02 to 0.06 mm is used with particular advantage.
Zweckmäßigerweise werden während des Schweißprozesses entstehende Dämpfe abgesaugt. Dadurch wird verhindert, daß eine Verschmutzung der Laserlinse auftritt.Vapors generated during the welding process are expediently extracted. This prevents the laser lens from becoming dirty.
Mit besonderem Vorteil wird in das noch offene Schlitzrohr ein Band aus einem Copolymer derart eingeführt, daß es unterhalb der Schweißnaht zum Liegen kommt. Dieses Copolymerband soll die durch das Laserschweißen zerstörte Copolymerschicht im Schweißnahtbereich ersetzen. Die Breite des Copolymerbandes bzw. Copolymerstreifens richtet sich nach der Breite der zerstörten Copolymerbeschichtung des Metallbandes. Das Band bzw. der Streifen ist zweckmäßigerweise etwas breiter als die zerstörte Schicht.It is particularly advantageous to insert a tape made of a copolymer into the still open slot tube in such a way that it comes to rest below the weld seam. This copolymer tape is intended to replace the copolymer layer in the weld area destroyed by laser welding. The width of the copolymer strip or copolymer strip depends on the width of the destroyed copolymer coating of the metal strip. The tape or strip is expediently somewhat wider than the destroyed layer.
Die Erfindung ist anhand der in den Figuren 1 und 2 schematisch dargestellten Ausführungsbeispiele näher erläutert.The invention is explained in more detail with reference to the exemplary embodiments shown schematically in FIGS. 1 and 2.
Fig. 1 zeigt ein sogenanntes CATV-Kabel (Cable Antenna Television) und Fig. 2 zeigt eine Darstellung des erfindungsgemäßen Verfahrens.1 shows a so-called CATV cable (Cable Antenna Television) and FIG. 2 shows an illustration of the method according to the invention.
Das in Fig. 1 dargestellte Kabel weist einen Innenleiter 1 aus Kupfer bzw. aus einem mit Kupfer ummanteltem Aluminiumdraht, eine dielektrische Schicht 2 aus z.B. aufgeschäumtem Polyethylen, einen Außenleiter 3 aus Aluminium sowie einen Außenmantel 5 aus z. B. Polyethylen auf. Der Außenleiter 3 besteht aus einem Aluminiumband
3 a, welches eine Copolymerschicht 3 b aufweist. Durch eine Schweißnaht 4 ist aus dem copolymerbeschichteten Aluminiumband 3 a, 3 b der rohrförmige Außenleiter 3 entstanden. Der Außenleiter 3 ist über die Copolymerschicht 3 b mit der dielektrischen Schicht 2 verklebt. Vorteilhaft ist auch eine Verklebung des Innenleiters 1 mit der dielektrischen Schicht 2, so daß ein längswasserdichtes Kabel entsteht. Ein Verklebung zwischen dem Außenleiter 4 und dem Außenmantel 5 kann für manche Anwendungsfälle von Vorteil sein, ist jedoch aus elektrischen Gründen nicht erforderlich.The cable shown in Fig. 1 has an
3 a, which has a
Die Herstellung eines solchen Kabels soll anhand der Fig. 2 näher erläutert werden. Der mit der dielektrischen Schicht 2 versehene Innenleiter 1 wird von einer Vorratstrommel 6 kontinuierlich abgezogen und von dem von einer Vorratsspule 7 abgezogenen copolymerbeschichteten Aluminiumband 3 a, 3 b umhüllt. Das copolymerbeschichtete Aluminiumband 3 a, 3 b wird um die dielektrische Schicht 2 zu einem Rohr mit einem größeren Durchmesser, d. h. mit einem Spalt gefertigt. Der Schlitz des Rohres wird mittels einer Laserschweißeinrichtung 8 kontinuierlich verschweißt. Bei der Verschweißung des den Außenleiter 3 bildenden Rohres wird die an der inneren Oberfläche des Rohres befindliche Copolymerschicht 3 b zumindest im Bereich der Schweißnaht 4 zerstört. Ein Streifen 9 aus einem Copolymer wird von einer Vorratsspule 10 abgezogen und auf die dielektrische Schicht 2 aufgelegt, so daß der Streifen unterhalb der Schweißnaht 4 liegt. Die bei der Verbrennung der Copolymerschicht 3 b entstehenden Dämpfe werden durch eine Absaugeinrichtung 11 entfernt. Das geschweißte Rohr wird dann durch eine Matrize 12 auf die Oberfläche der dielektrischen Schicht 2 heruntergezogen, welche dadurch geringfügig komprimiert wird. Danach wird mittels eines Etruders 13 der Außenmantel 5 auf den Außenleiter 3 extrudiert. Durch die Extrusionswärme wird die Copolymerschicht 3 b aktiviert und verklebt die dielektrische Schicht 2 mit der Aluminiumschicht 3 a. Gleichzeitig verschmilzt der Copolymerstreifen 9 und "repariert" die Schweißnaht 4 von unten. Das fertige Kabel wird dann z. B. auf eine Trommel 14 aufgewickelt.The manufacture of such a cable will be explained in more detail with reference to FIG. 2. The
Claims (7)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4304780 | 1993-02-17 | ||
| DE4304780A DE4304780C2 (en) | 1993-02-17 | 1993-02-17 | Method of making a coaxial cable |
| US08/345,301 US5515603A (en) | 1993-02-17 | 1994-11-28 | Method for manufacturing a coaxial cable |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0612080A2 true EP0612080A2 (en) | 1994-08-24 |
| EP0612080A3 EP0612080A3 (en) | 1994-09-07 |
| EP0612080B1 EP0612080B1 (en) | 1997-04-09 |
Family
ID=25923164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94101678A Revoked EP0612080B1 (en) | 1993-02-17 | 1994-02-04 | Manufacturing process of a coaxial cable |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US5515603A (en) |
| EP (1) | EP0612080B1 (en) |
| JP (1) | JPH06251648A (en) |
| DE (1) | DE4304780C2 (en) |
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| FR2746539B1 (en) * | 1996-03-21 | 1998-05-22 | Kertscher Sa E | METHOD FOR MANUFACTURING COAXIAL CABLES |
| US6204445B1 (en) | 1997-02-06 | 2001-03-20 | Commscope Properties, Llc | Aerially installed communications cable |
| US6449834B1 (en) * | 1997-05-02 | 2002-09-17 | Scilogy Corp. | Electrical conductor coils and methods of making same |
| ATE306714T1 (en) * | 1997-08-14 | 2005-10-15 | Commscope Inc | COAXIAL CABLE AND ITS PRODUCTION PROCESS |
| US6596393B1 (en) * | 2000-04-20 | 2003-07-22 | Commscope Properties, Llc | Corrosion-protected coaxial cable, method of making same and corrosion-inhibiting composition |
| DE10146807A1 (en) * | 2001-09-22 | 2003-04-10 | Nexans | Process for the production of longitudinally welded helically corrugated metal pipes |
| US6693241B2 (en) * | 2002-04-24 | 2004-02-17 | Andrew Corporation | Low-cost, high performance, moisture-blocking, coaxial cable and manufacturing method |
| US8618418B2 (en) * | 2009-04-29 | 2013-12-31 | Ppc Broadband, Inc. | Multilayer cable jacket |
| IT1396387B1 (en) * | 2009-10-28 | 2012-11-19 | Everlux S R L | PLANT FOR THE PRODUCTION OF A MULTI-PIPE FOR HYDRAULIC CONNECTION AND SOLAR PANEL WIRING. |
| US20110132633A1 (en) * | 2009-12-04 | 2011-06-09 | John Mezzalingua Associates, Inc. | Protective jacket in a coaxial cable |
| US8618688B2 (en) * | 2010-01-29 | 2013-12-31 | American Wire Group Inc. | Wind turbine configuration with power cable and method of electrically connecting a generator of a wind turbine to a transformer |
| CN101913025A (en) * | 2010-07-29 | 2010-12-15 | 江苏通鼎光电股份有限公司 | Method for connecting ultrathin metal strap in production of radio frequency coaxial cable and connecting device |
| EP2615240A3 (en) * | 2012-01-16 | 2014-09-03 | Prad Research Development Limited | Tubing Encased Motor Lead |
| JP5984440B2 (en) * | 2012-03-14 | 2016-09-06 | 矢崎総業株式会社 | Coaxial wire manufacturing method |
| US9058922B2 (en) * | 2013-03-25 | 2015-06-16 | Commscope Technologies Llc | Method of manufacturing chain extended foam insulation coaxial cable |
| CN103737179A (en) * | 2013-12-31 | 2014-04-23 | 镇江蓝箭电子有限公司 | Production method for outer conductor of high performance cable connector |
| US10186849B2 (en) * | 2015-08-04 | 2019-01-22 | Speranza Machining, Inc. | Method and apparatus for repairing ISO bus electricity transfer systems |
| EP3799083A1 (en) * | 2019-09-30 | 2021-03-31 | Nexans | Method for producing coaxial cables with a thin-walled radially closed outer conductor |
| EP3797891B1 (en) * | 2019-09-30 | 2023-08-02 | Nexans | Method for the continuous production of thin-walled hollow profiles with small diameters, corrugated in sections and made from non-ferrous metals |
| US11887944B2 (en) | 2020-06-23 | 2024-01-30 | Intel Corporation | Additive manufacturing for integrated circuit assembly connectors |
| US11842826B2 (en) | 2020-06-23 | 2023-12-12 | Intel Corporation | Additive manufacturing for integrated circuit assembly connector support structures |
| US11895815B2 (en) * | 2020-06-23 | 2024-02-06 | Intel Corporation | Additive manufacturing for integrated circuit assembly cables |
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| GB791514A (en) * | 1954-02-01 | 1958-03-05 | Gen Electric Co Ltd | Improvements in or relating to machines and methods for corrugating tubes |
| GB791513A (en) * | 1954-02-01 | 1958-03-05 | Pirelli General Cable Works | Improvements in or relating to machines and methods for corrugating electric cable sheaths |
| US3315025A (en) * | 1964-12-30 | 1967-04-18 | Anaconda Wire & Cable Co | Electric cable with improved resistance to moisture penetration |
| US3405228A (en) * | 1965-08-11 | 1968-10-08 | Gen Cable Corp | Folded, laminated electrical cable sheath having abutting edges of one lamination unwelded |
| US3397442A (en) * | 1965-11-12 | 1968-08-20 | Bell Telephone Labor Inc | Coaxial cable forming apparatus |
| US3430330A (en) * | 1965-12-30 | 1969-03-04 | Gen Cable Corp | Method of making aluminum sheathed coaxial cable |
| US3553811A (en) * | 1965-12-30 | 1971-01-12 | Gen Cable Corp | Apparatus for making coaxial cable with welded metal sheath |
| US3356790A (en) * | 1966-02-18 | 1967-12-05 | Gen Cable Corp | Coaxial cable |
| US3567846A (en) * | 1968-05-31 | 1971-03-02 | Gen Cable Corp | Metallic sheathed cables with roam cellular polyolefin insulation and method of making |
| US3633261A (en) * | 1969-04-25 | 1972-01-11 | Ver Draht & Kabelwerke Ag | Sheathing tool |
| US3569610A (en) * | 1969-10-15 | 1971-03-09 | Gen Cable Corp | Ethylene-propylene rubber insulated cable with cross-linked polyethylene strand shielding |
| GB1299964A (en) * | 1970-02-20 | 1972-12-13 | British Insulated Callenders | Improvements in or relating to jointing and terminating electric cables |
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| US4083484A (en) * | 1974-11-19 | 1978-04-11 | Kabel-Und Metallwerke Gutehoffnungshutte Ag | Process and apparatus for manufacturing flexible shielded coaxial cable |
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| US5212350A (en) * | 1991-09-16 | 1993-05-18 | Cooper Industries, Inc. | Flexible composite metal shield cable |
-
1993
- 1993-02-17 DE DE4304780A patent/DE4304780C2/en not_active Expired - Fee Related
-
1994
- 1994-02-04 EP EP94101678A patent/EP0612080B1/en not_active Revoked
- 1994-02-15 JP JP6018664A patent/JPH06251648A/en active Pending
- 1994-11-28 US US08/345,301 patent/US5515603A/en not_active Expired - Fee Related
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| FR2440062A1 (en) * | 1978-10-24 | 1980-05-23 | Cables De Lyon Geoffroy Delore | Coaxial transmission cable prodn. - with integration of insulation extrusion and fitting of tubular aluminium conductor to give void-free seal between insulation and conductor |
| EP0496231A2 (en) * | 1991-01-24 | 1992-07-29 | kabelmetal electro GmbH | Procedure for the fabrication of tubes with longitudinally welded seam |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4304780C2 (en) | 2001-03-22 |
| EP0612080B1 (en) | 1997-04-09 |
| EP0612080A3 (en) | 1994-09-07 |
| US5515603A (en) | 1996-05-14 |
| JPH06251648A (en) | 1994-09-09 |
| DE4304780A1 (en) | 1994-08-18 |
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