WO1998002890A1 - Methode de fabrication d'un cable a ruban dote d'un conducteur de masse interne - Google Patents

Methode de fabrication d'un cable a ruban dote d'un conducteur de masse interne Download PDF

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Publication number
WO1998002890A1
WO1998002890A1 PCT/US1997/012146 US9712146W WO9802890A1 WO 1998002890 A1 WO1998002890 A1 WO 1998002890A1 US 9712146 W US9712146 W US 9712146W WO 9802890 A1 WO9802890 A1 WO 9802890A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
conductors
strand
conductor
insulating material
Prior art date
Application number
PCT/US1997/012146
Other languages
English (en)
Inventor
Robert Gordon Truxes
Original Assignee
W.L. Gore & Associates, Inc.
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 W.L. Gore & Associates, Inc. filed Critical W.L. Gore & Associates, Inc.
Priority to AU36005/97A priority Critical patent/AU3600597A/en
Publication of WO1998002890A1 publication Critical patent/WO1998002890A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/08—Flat or ribbon cables
    • H01B7/0861—Flat or ribbon cables comprising one or more screens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/38—Insulated conductors or cables characterised by their form with arrangements for facilitating removal of insulation
    • H01B7/385—Insulated conductors or cables characterised by their form with arrangements for facilitating removal of insulation comprising a rip cord or wire

Definitions

  • This invention generally relates to ribbon cable and methods for manufacturing the same More particularly, the present invention relates to a novel method of manufacturing ribbon cable having at least one internal drain conductor for grounding the ribbon cable
  • FIG. 1 illustrates a well-known, commercially available ribbon cable, generally indicated at 10
  • the cable 10 comprises a plurality of conductors, each indicated at 12, which are in parallel relation with one another, and a layer of insulating matenal 14 in which the conductors are embedded
  • Another layer of insulating material 16 is laminated on layer 14
  • a thin metallic layer or shield 18 is laminated on layer 16, the shield engaging a dram wire 20 positioned adjacent
  • a method for manufacturing ribbon cable comprises the steps of
  • a purpose of the present invention to provide a method for manufacturing ribbon cable having at least one drain conductor internally with respect to the lateral edges of the ribbon cable
  • Another purpose of the present invention is to provide a method for manufacturing ribbon cable having internal drain conductors which is less expensive than the other prior art methods discussed above
  • a further purpose of the present invention is to provide a method for manufacturing ribbon cable, having internal drain conductors, which positions the conductors and drain conductors precisely within the cable
  • Another purpose of the present invention is to provide a method for manufacturing ⁇ bbon cable, having internal dram conductors, which is less time consuming than the other prior art methods BRIEF DESCRIPTION OF THE DRAWINGS
  • Figure 1 is a perspective view of a prior art ribbon cable having a drain wire located adjacent a lateral edge margin of the cable
  • FIG. 2 is a perspective view of a ribbon cable manufactured in accordance with the method of the present invention, the ribbon cable having internally located drain wires,
  • Figure 3 is a front elevational view of the ribbon cable in a stage of its manufacturing process after laminating a pair of polymeric sheets to one another with a plurality of conductors disposed therebetween, and
  • Figure 4 is a perspective view of the ribbon cable after notching one of the polymeric sheets adjacent a stacked conductor and strand of material at an end of the sheet and peeling back the strand for removing a strip of insulating material above the strand thereby exposing the conductor the exposed conductor serving as the drain conductor for the ribbon cable
  • the ribbon cable manufactured pursuant to the method of the present invention is generally illustrated at 30 in Figure 2
  • the ribbon cable 30 includes a plurality of conductors, each indicated at 32, which are disposed within a layer of insulating material, generally indicated at 34
  • Insulating material 34 is generally comprised of two polymeric sheets (not shown) laminated to one another with the conductors 32 disposed therebetween
  • At least one layer of shielding material 40 is bonded to an upper surface of the layer of insulating material 34 As shown in Figure 2, there are two shields 40 laminated to the insulation layer 34
  • the shields 40 are preferably applied on the insulating layer 34 during a separate manufacturing step which will be described in greater detail hereinafter
  • the top shield 40 engages several conductors wherein these conductors constitute drain conductors, which, as described above, allow easy grounding of the shield to intended circuitry.
  • the drain conductors are designated by reference numerals 42 and 44 in Figure 2. It should be noted that the drain conductors 42 located adjacent the lateral edge margins of the ribbon cable 30 may be manufactured in the well-known manner described above.
  • the internally located drain conductors 44 are manufactured pursuant to the novel method of the present invention.
  • the manufacturing method described herein makes it possible to produce ribbon cable 30 with drain conductors 44 located internally with respect to opposing lateral edge margins of the ribbon cable in a continuous and cost- effective fashion.
  • the lamination of the cables, together with any shield is done in a single pass.
  • the polymeric sheets comprising the insulation material 34 which have been coated on one side with a pressure or heat activated adhesive, are laminated together under pressure and heat with the metallic conductors 32 (and the drain conductors 42, 44) sandwiched between the sheets.
  • the exact placement of the conductors 32 (and the drain conductors 42, 44) with respect to the lateral edge margins of the ribbon cable 30 and to each other is obtained by the use of grooved guide rollers (not shown).
  • rollers are precisely machined such that the conductors, when laid in the groves of the rollers, are on the exact centeriine spacing required for the cable construction.
  • the result is a laminated cable with precisely spaced metallic conductors.
  • Such rollers are disclosed in U.S. Patent No. 3,833,755 to Soelberg, and are well-known in the art of ribbon manufacturing.
  • the typical construction of shielded cables is similar, except one or more of the polymeric sheets is coated on both sides with the adhesive.
  • the polymeric sheets then become the "inner” layer of insulating material as an additional layer of metallized film is laminated to the outside. This metallized layer becomes the shield.
  • the conductors 32, 42 and 44 and the insulation layer 34 are laminated together in one or two passes.
  • the polymeric sheets comprising the insulation layer 34 are coated with adhesive on both sides and are passed over heated drums (not shown) that activate the adhesive.
  • the conductors 32, 42 and 44 are introduced between the polymeric sheets by the use of the guide rollers which provide the exact placement of the conductors relative to each other. If the shield 40 (or shields) is placed onto the insulating layer 34 in a single pass, metallized film (without adhesive) constituting the shield is also fed into the machine so that the metallized side is in contact with the adhesive layer
  • the layer of insulation material and 34 conductors 32, 42 and 44 are then compressed providing intimate contact, and fusing the sheets constituting the layer into a cable
  • the outer metallized shield 40 is placed on the cable after the insulating layer by re-heating cable after the first pass in a similar fashion
  • the two step process is most often used when a special step must be taken before the shield is laminated to the cable
  • the method of the present invention provides for the selective removal of a portion of the insulation material 34 from discrete conductors in a step intermediate between the two lamination passes, the removal step constituting the advancement of the present invention over the prior art methods
  • Certain insulation materials, such as polyester for example possess properties whereby a defect, tear, or notch, once started, will propagate linearly under certain conditions along the length of the material resulting in a clean edge
  • the method of the present invention takes advantage of this property of the material comprising the insulating layer 34 More specifically, the polymeric material used for the sheets which comprise insulating material 34, when notched or torn at an end in a longitudinal direction along the length of the tape, is capable of tearing or being peeled along a straight line along
  • an additional strand of material 46 is placed above or on top of the conductor 44 which has been designated as an internally located drain
  • the strand 46 is fabricated from metallic wire, or another similar material with sufficient tensile strength to withstand the forces applied The location of the strand 46 is provided during the passing of the conductors 32,
  • notches or tears 48 are formed in the top sheet of polyme ⁇ c material which engages the strand 46
  • the notches 48 are formed in the top polymeric sheet at the end of the sheet in a direction parallel to the direction of the conductors 32, 42 and 44
  • the notches 48 are located in the polymeric sheet adjacent and above the lateral edges of the strand 46 Suitable means is provided for automating this notching step It should be noted that the orientation of the strand 46 being placed above conductor 44 as shown in Figure 3 could be reversed (i e , located below the conductor), or that other strands could be provided above any of the other conductors 32, and still fall within the scope of the present invention
  • a strip of material 50 from the polymeric sheet is removed from the sheet by peeling back the strand 46 and the strip in the manner illustrated in Figure 4
  • the strand of material 46 produces stress on the polymeric sheet laminated to the strand, resulting in the propagation of the tear and the subsequent removal of the strip 50
  • the notches 48 formed in the polymeric sheet enable the initiation of the peeling step of the method Once the strip 50 is peeled back, the strip and strand 46 are removed and discarded This action results in the exposure of the conductor 44 initially positioned below the strand 46 Suitable means are provided for automating the peeling step of the method
  • the polymeric sheets, defining the insulating material 34 are comprised of polyester
  • the metallized shield 40 is then applied in a manner as described above As the strip 50 of the insulation layer 34 has been removed over the dram conductor 44, the conductor will come into intimate and engaging contact with the shield 40, creating the ribbon cable 30 depicted in Figure 2
  • drain conductors 44 can be provided on the ribbon cable 30
  • any number of drain conductors 44 can be provided on the ribbon cable 30
  • there are two internally located dram conductors 44 whereas in Figures 3 and 4, one drain conductor 44 is formed

Abstract

L'invention concerne une méthode de fabrication d'un câble à ruban, comprenant la disposition de plusieurs conducteurs dans une couche de matériau isolant. Les conducteurs sont alignés en parallèle les uns par rapport aux autres dans le sens de la longueur du câble. Un des conducteurs au moins est doté d'un brin de matériau isolant contigu à celui-ci, de façon que le conducteur et le brin sont empilés. On pratique des encoches à une extrémité de la couche de matériau adjacente au conducteur et brin empilés. On détache le brin de matériau débutant aux encoches pratiquées dans la couche isolante afin d'éliminer une bande de matériau isolant sur le brin, et d'exposer l'autre conducteur. Le conducteur exposé sert de conducteur de masse au câble à ruban, après obtention d'un blindage par laminage de la couche isolante, de manière à ce que ce blindage soit contact avec le conducteur exposé.
PCT/US1997/012146 1996-07-15 1997-07-14 Methode de fabrication d'un cable a ruban dote d'un conducteur de masse interne WO1998002890A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU36005/97A AU3600597A (en) 1996-07-15 1997-07-14 Method of manufacturing ribbon cable having an internal drain conductor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US68358496A 1996-07-15 1996-07-15
US08/683,584 1996-07-15

Publications (1)

Publication Number Publication Date
WO1998002890A1 true WO1998002890A1 (fr) 1998-01-22

Family

ID=24744657

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1997/012146 WO1998002890A1 (fr) 1996-07-15 1997-07-14 Methode de fabrication d'un cable a ruban dote d'un conducteur de masse interne

Country Status (2)

Country Link
AU (1) AU3600597A (fr)
WO (1) WO1998002890A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004066320A2 (fr) * 2003-01-20 2004-08-05 Leoni Kabel Gmbh & Co Kg Cable de donnees
US9648358B2 (en) 2001-02-21 2017-05-09 Rovi Guides, Inc. Systems and methods for interactive program guides with personal video recording features

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5250127A (en) * 1988-09-20 1993-10-05 Fujikura Ltd. Method of manufacture for shielded flat electrical cable

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5250127A (en) * 1988-09-20 1993-10-05 Fujikura Ltd. Method of manufacture for shielded flat electrical cable

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9648358B2 (en) 2001-02-21 2017-05-09 Rovi Guides, Inc. Systems and methods for interactive program guides with personal video recording features
WO2004066320A2 (fr) * 2003-01-20 2004-08-05 Leoni Kabel Gmbh & Co Kg Cable de donnees
WO2004066320A3 (fr) * 2003-01-20 2004-09-23 Leoni Kabel Gmbh & Co Kg Cable de donnees

Also Published As

Publication number Publication date
AU3600597A (en) 1998-02-09

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