US3848073A - Shielding tapes - Google Patents

Shielding tapes Download PDF

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US3848073A
US3848073A US38989373A US3848073A US 3848073 A US3848073 A US 3848073A US 38989373 A US38989373 A US 38989373A US 3848073 A US3848073 A US 3848073A
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Prior art keywords
foil
film
folded
shielding
electrical resistance
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H Simons
F Timmons
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Visy Glass Packaging Services Pty Ltd
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Sun Chemical Corp
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Priority claimed from US00323950A external-priority patent/US3819443A/en
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Assigned to FACILE TECHNOLOGIES INC., A CORP. OF reassignment FACILE TECHNOLOGIES INC., A CORP. OF ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SUN CHEMICAL CORPORATION, 200 PARK AVE., NEW YORK, NY 10166 A CORP. OF DE
Assigned to FACLE TECHNOLOGIES INC reassignment FACLE TECHNOLOGIES INC ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SUN CHEMICAL CORPORATION
Assigned to BTR NYLEX LIMITED, AN AUSTRALIAN CORP. reassignment BTR NYLEX LIMITED, AN AUSTRALIAN CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: FACILE TECHNOLOIES INC.
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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
    • H01B13/2673—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping by longitudinal lapping of a compartment separating metallic screen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/02—Cables with twisted pairs or quads
    • H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
    • H01B11/08—Screens specially adapted for reducing cross-talk
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/002—Inhomogeneous material in general
    • H01B3/004—Inhomogeneous material in general with conductive additives or conductive layers
    • 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
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
    • H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31678—Of metal
    • Y10T428/31681—Next to polyester, polyamide or polyimide [e.g., alkyd, glue, or nylon, etc.]
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31786—Of polyester [e.g., alkyd, etc.]
    • Y10T428/31797—Next to addition polymer from unsaturated monomers

Definitions

  • ABSTRACT Shielding tapes comprise a plurality of fins, each of which comprises a thin elongated flexible foil of material having relatively low electrical resistance characteristics and having each surface thereof bonded to and coextensive with a thin elongated flexible film of material having relatively high electrical resistance insulation characteristics.
  • This invention relates to multiconductor cables in general and more particularly relates to means for shielding certain of the conductors of a multiconductor cable from other conductors of the cable. It is an improvement over the shielding means disclosed in US. Pat. No. 3,622,683 issued Nov. 23, 1971, to W. L. Roberts et al, for Telephone Cable with Improved Crosstalk Properties.
  • a longitudinal shielding tape having a wide variety of embodiments whereby the speed of manufacturing the cable and the shielding efficiency are increased, the volume and space within the cable are better utilized and foil corrosion is minimized.
  • the encapsulated film/foil laminated longitudinal multiconductor cable electrostatic shielding tapes of this invention are prepared by the steps of (A) forming a strip of a laminate of metal foil and plastic film bonded together by any suitable and conventional means with any suitable adhesive, such as a heatfusible resin, a solvent-release rubber, or a solvent-release plastic base adhesive, and (B) folding the strip (A) upon itself.
  • FIG. 1 is a cross'sectional view of a laminate of plastic film and metal foil.
  • FIG. 2 is a cross-sectional view of a laminate of plastic film and metal foil with a heat-fusible coating on the metal foil.
  • FIG. 3 is a cross-sectional view of an embodiment of a shielding tape showing the laminate of FIG. 2 folded upon itself with the plastic film on the outside.
  • FIG. 4 is a cross-sectional view of an embodiment of a shielding tape showing the laminate of FIG. 2 folded upon itself from both edges.
  • FIG. 5 is a sectional view of an embodiment of a shielding tape showing the folded laminate of FIG. 4 with a strip of plastic film over the fold gap.
  • FIG. 6 is a cross-sectional view of an embodiment of a shielding tape showing two folded laminates of FIG. 1 with a plastic film on each face.
  • FIG. 7 is a cross-sectional view of the structure of FIG. 6 wherein the folded laminates of FIG. I have opened to form four compartments.
  • FIGS. 8 and 9 are cross-sectional views of embodiments of a shielding tape showing a plurality of folded laminates of FIG. I of equal lengths with a plastic film on the top and the bottom faces.
  • FIG. 10 is a cross-sectional view of an embodiment of a shielding tape showing a plurality of folded laminates of FIG. 1 of unequal lengths with a plastic film on the top and the bottom faces.
  • FIG. 11 is a cross-sectional view of a cable structure showing the cable jacket and four longitudinal cable compartments of equal size.
  • FIG. 12 is a cross-sectional view of a cable structure showing the cable jacket and six longitudinal cable compartments of unequal size.
  • FIG. 1 illustrates the laminate of a metal foil 10 and a plastic film 11 which is the basis of the shielding tapes of this invention.
  • the metal foil 10 may be any conductive metal normally used in the cable industry such as for example aluminum, copper, tinned copper, steel, silver, or the like.
  • the plastic film 11 may be any suitable insulation material such as for example a polyolefin, e.g., polyethylene or polypropylene; polyethylene terephthalate (Mylar); tetrafluoroethylene polymer (Teflon); polyvinyl chloride; polystyrene; polyvinylidene fluoride; a polyamide; a polycarbonate; or the like.
  • a polyolefin e.g., polyethylene or polypropylene
  • Mylar polyethylene terephthalate
  • Teflon tetrafluoroethylene polymer
  • polyvinyl chloride polystyrene
  • polystyrene polyvinylidene fluoride
  • a polyamide a polycarbonate
  • the adhesive interface 13 may be any suitable adhesive such as for example a polyolefin, a polyester, polyvinyl chloride, or the like.
  • FIG. 2 Shown in FIG. 2 is essentially the same laminate as shown in FIG. 1 but with a heat-fusible coating (12) on the metal foil.
  • the coating may be any suitable material such as for example polyethylene, polyester, polyvinyl chloride, or the like.
  • FIG. 3 The simplest embodiment of this invention is shown in FIG. 3.
  • This structure is formed by the steps of (1) making a laminate of a metal foil 10 half the thickness required for shielding and a plastic film ll of the thickness required for insulating the finished tape, (2) applying a heat-fusible coating 12 to the metal foil, (3) cutting the laminate to twice the width required, and (4) folding the laminate upon itself with the coated metal foil on the inside, forming a shielding tape with one folded edge insulated and the core heat-sealed to block moisture.
  • FIG. 4 shows a second embodiment in which the laminate is folded upon itself from both ends, the edges being butted at fold gap 14 to form a tape that is watertight and thus protected from corrosion, and both edges are insulated.
  • the fold gap 14 is shown covered with a separate piece of insulating film 15 which is laminated thereto by means of any suitable adhesive.
  • the insulating film 15 may be the same as film 11 or different. This further protects the foil edges from corrosion and completely encapculates the conductive foil in an insulating film.
  • Shielding tape systems for longitudinal parallel shielding of insulated wires and wire groups in compartmentalized multiconductor cables are also within the scope of this invention. These are made by the steps of (l) laminating by any known means a metal foil 10 and a plastic film 11, as in FIG. 1, (2) slitting the laminate to any desired width, (3) slitting heat-fusible coated plastic film 16 to the same width as the laminate in step (2), (4) folding the laminate from step (2) in half lengthwise plastic-to-plastic, (5) laying two folded laminate tapes from step (4) fold-to-fold and (6) laminating to each of the resulting faces a heat-fusible coated plastic film from step (3) in any known and convenient manner, as in FIG. 6.
  • the plastic film 16 may be the same as film 11 or different.
  • the shielding tape from step (5) above is inserted into the ultimate cable by any suitable means, such as by feeding the tape from a pad directly into the cabler with the insulated single conductors or insulated groups.
  • the shielded, compartmentalized multiconductor core can then be further processed, i.e., jacketed, sheathed, etc.
  • FIG. 11 illustrates an electrical cable comprising an outer jacket or sheath 18 made of an insulating material such as plastic, rubber, or the like, and a fourcompartment shielding tape 19, for example, as shown in FIGS. 6 and 7.
  • FIG. 12 illustrates an electrical cable comprising an outer jacket or sheath l8 and a six-compartment shielding tape 19, for example, as shown in FIG. 10.
  • the shielding tapes described herein may be spliced in any suitable manner as long as there is shielding continuity; thus there may be used, for example, an electrical continuity penetration clamp to join the conducting material and a plastic film to join the insulating material.
  • a shielding tape comprising in combination (a) a thin elongated flexible film of material having relatively high electrical resistance insulation characteristics and (b) a thin elongated flexible foil of material having relatively low electrical resistance characteristics and having one surface thereof bonded to one surface of said film (a) and being coextensive therewith, said shielding tape being folded along a longitudinally extending crease, thereby to be doubled in thickness, said thin foil (b) havinga thin layer of bonding material disposed on the surface thereof which is opposite to its said one surface bonded to said film (a), whereby a foil-to-foil connection is made by said thin layer of bonding material.
  • a shielding. tape comprising in combination (1) a plurality of folded laminates, each comprising (a) a thin elongated flexible film of material having relatively high electrical resistance insulation characteristics and (b) a thin elongated flexible foil of material having relatively low electrical resistance characterisitcs and having one surface thereof bonded to one surface of said film (a) and being coextensive therewith, each said laminate being folded along a longitudinally extending crease, thereby to be doubled in thickness and bringing the surface of said film (a) which is opposite its said onesurface into contact with itself, whereby the surface of said foil (b) forms outer opposite surfaces of said folded laminate and (2) insulation film layers bonded to and coextensive with both the top and the bottom foil surfaces of said plurality of folded laminates arranged fold-to-fold and foil-to-foil.

Abstract

Shielding tapes comprise a plurality of fins, each of which comprises a thin elongated flexible foil of material having relatively low electrical resistance characteristics and having each surface thereof bonded to and coextensive with a thin elongated flexible film of material having relatively high electrical resistance insulation characteristics.

Description

United States Patent [1 1 Simons et al.
[ 1 Nov. 12, 1974 I SHIELDING TAPES [75] Inventors: Herbert D. Simons, Long Valley,
N.J.; Frank E. Timmons, Richmond, Ind.
[73] Assignee: Sun Chemical Corporation, New
York, NY.
22 Filed: Aug. 20, 1973 [21] Appl. N0.: 389,893
7 Related U.S. Application Data [62] Division of Ser. No. 323,950, Jan. 15, 1973.
[52] U.S. Cl 174/36, 161/99, 161/167,
161/213,174/117 F, 174/119 C [51] Int. Cl. 1101b 11/06 [58] Field of Search 29/624, 235; 156/47, 51,
156/52, 53, 54, 196, 160, 163, 164, 204, 213, 221, 222,226, 227, 250, 258, 264, 265; 161/99, 165, 167, 213-219, 221222; 138/111,115, 116,117; 174/70 R, 72, 68 C, 117 R, 117 F, 117 FF, 119 C, 36, 27, 34, 3
SR, 126C? [56] References Cited 1 UNITED STATES PATENTS 2,318,367 5 1943 Brigg 174/119 R 2,852,423 9/1958 Bassett, Jr 174/36 UX 3,051,771 8/1962 Lee 174/36 3,622,683 11/1971 Roberts et a1. 1. 174/36 3,634,800 l/l972 Fisher 174/119 R FOREIGN PATENTS OR APPLICATIONS 356,899 9/1931 Great Britain 174/36 203,527 6/1939 Switzerland 174/36 50,273 2/1932 Norway .1 174/36 448,551 4/1969 Japan 174/1 19 R Primary ExaminerA. T. Grimley Attorney, Agent, or Firm-Cynthia Berlow [57] ABSTRACT Shielding tapes comprise a plurality of fins, each of which comprises a thin elongated flexible foil of material having relatively low electrical resistance characteristics and having each surface thereof bonded to and coextensive with a thin elongated flexible film of material having relatively high electrical resistance insulation characteristics.
2 Claims, 12 Drawing Figures PATENTEL, w I 21914 3, 848. 0? a SHEEI 2 BF 2 F/G..9 F/G/O SHIELDING TAPES This application is a division of copending application Ser. No. 323,950(filed Jan. 15, I973).
This invention relates to multiconductor cables in general and more particularly relates to means for shielding certain of the conductors of a multiconductor cable from other conductors of the cable. It is an improvement over the shielding means disclosed in US. Pat. No. 3,622,683 issued Nov. 23, 1971, to W. L. Roberts et al, for Telephone Cable with Improved Crosstalk Properties.
As communications systems grow more complex, it becomes increasingly important to be able to transmit an increasing number of currents within the same cable, for example the transmission of telephone signals, video messages, and two-way data transmission. It is essential that the conductors be isolated electrically and physically from each other within the cable. It is also essential that the overall cable structure be compact, lightweight, and flexible and that the conductors therein be kept free from moisture.
In the communications industry it is common practice to use a floating or grounded shield of aluminum or copper between several sections of cable. This shield is generally but not necessarily totally sealed and moistureproof within an enclosure of plastic insulating film in order to keep the shield free from electrical contact with adjacent insulated conductors and free from damage and/or corrosion by moisture which may enter the cable and track the length of the shield.
The use of one tape to shield one conductor or a pair or a group of conductors from another conductor or pair or group of conductors, permitting simultaneous transmission of two separate currents of the same frequency within the same cable, is known, as in for example U.S. Pat. Nos. 3,032,604 and No. 3,622,683.
In accordance with the instant invention there is provided a longitudinal shielding tape having a wide variety of embodiments whereby the speed of manufacturing the cable and the shielding efficiency are increased, the volume and space within the cable are better utilized and foil corrosion is minimized.
In general the encapsulated film/foil laminated longitudinal multiconductor cable electrostatic shielding tapes of this invention are prepared by the steps of (A) forming a strip of a laminate of metal foil and plastic film bonded together by any suitable and conventional means with any suitable adhesive, such as a heatfusible resin, a solvent-release rubber, or a solvent-release plastic base adhesive, and (B) folding the strip (A) upon itself.
The invention will be more fully understood from the following description of the accompanying drawings, in which:
FIG. 1 is a cross'sectional view of a laminate of plastic film and metal foil.
FIG. 2 is a cross-sectional view of a laminate of plastic film and metal foil with a heat-fusible coating on the metal foil.
FIG. 3 is a cross-sectional view of an embodiment of a shielding tape showing the laminate of FIG. 2 folded upon itself with the plastic film on the outside.
FIG. 4 is a cross-sectional view of an embodiment of a shielding tape showing the laminate of FIG. 2 folded upon itself from both edges.
FIG. 5 is a sectional view of an embodiment of a shielding tape showing the folded laminate of FIG. 4 with a strip of plastic film over the fold gap.
FIG. 6 is a cross-sectional view of an embodiment of a shielding tape showing two folded laminates of FIG. 1 with a plastic film on each face.
FIG. 7 is a cross-sectional view of the structure of FIG. 6 wherein the folded laminates of FIG. I have opened to form four compartments.
FIGS. 8 and 9 are cross-sectional views of embodiments of a shielding tape showing a plurality of folded laminates of FIG. I of equal lengths with a plastic film on the top and the bottom faces.
FIG. 10 is a cross-sectional view of an embodiment of a shielding tape showing a plurality of folded laminates of FIG. 1 of unequal lengths with a plastic film on the top and the bottom faces.
FIG. 11 is a cross-sectional view of a cable structure showing the cable jacket and four longitudinal cable compartments of equal size.
FIG. 12 is a cross-sectional view of a cable structure showing the cable jacket and six longitudinal cable compartments of unequal size.
Now referring to the figures, FIG. 1 illustrates the laminate of a metal foil 10 and a plastic film 11 which is the basis of the shielding tapes of this invention. The metal foil 10 may be any conductive metal normally used in the cable industry such as for example aluminum, copper, tinned copper, steel, silver, or the like.
The plastic film 11 may be any suitable insulation material such as for example a polyolefin, e.g., polyethylene or polypropylene; polyethylene terephthalate (Mylar); tetrafluoroethylene polymer (Teflon); polyvinyl chloride; polystyrene; polyvinylidene fluoride; a polyamide; a polycarbonate; or the like.
The adhesive interface 13 may be any suitable adhesive such as for example a polyolefin, a polyester, polyvinyl chloride, or the like.
Shown in FIG. 2 is essentially the same laminate as shown in FIG. 1 but with a heat-fusible coating (12) on the metal foil. The coating may be any suitable material such as for example polyethylene, polyester, polyvinyl chloride, or the like.
The simplest embodiment of this invention is shown in FIG. 3. This structure is formed by the steps of (1) making a laminate of a metal foil 10 half the thickness required for shielding and a plastic film ll of the thickness required for insulating the finished tape, (2) applying a heat-fusible coating 12 to the metal foil, (3) cutting the laminate to twice the width required, and (4) folding the laminate upon itself with the coated metal foil on the inside, forming a shielding tape with one folded edge insulated and the core heat-sealed to block moisture.
FIG. 4 shows a second embodiment in which the laminate is folded upon itself from both ends, the edges being butted at fold gap 14 to form a tape that is watertight and thus protected from corrosion, and both edges are insulated.
In FIG. 5 the fold gap 14 is shown covered with a separate piece of insulating film 15 which is laminated thereto by means of any suitable adhesive. The insulating film 15 may be the same as film 11 or different. This further protects the foil edges from corrosion and completely encapculates the conductive foil in an insulating film.
Shielding tape systems for longitudinal parallel shielding of insulated wires and wire groups in compartmentalized multiconductor cables are also within the scope of this invention. These are made by the steps of (l) laminating by any known means a metal foil 10 and a plastic film 11, as in FIG. 1, (2) slitting the laminate to any desired width, (3) slitting heat-fusible coated plastic film 16 to the same width as the laminate in step (2), (4) folding the laminate from step (2) in half lengthwise plastic-to-plastic, (5) laying two folded laminate tapes from step (4) fold-to-fold and (6) laminating to each of the resulting faces a heat-fusible coated plastic film from step (3) in any known and convenient manner, as in FIG. 6. The plastic film 16 may be the same as film 11 or different.
The shielding tape from step (5) above is inserted into the ultimate cable by any suitable means, such as by feeding the tape from a pad directly into the cabler with the insulated single conductors or insulated groups. The shielded, compartmentalized multiconductor core can then be further processed, i.e., jacketed, sheathed, etc. As the tape is fed into the cabler it opens as in FIG. 7 to a system having four fins forming four longitudinal parallel shielding compartments, each basically pie-shaped or triangular in shape and having the same cross-sectional areas.
It is within the scope of this invention to vary the type and gauge of the film and/or of the foil. It is also within the scope of this invention to provide longitudinal multicompartmentalized shielding tapes having more than four fins and parallel compartments by varying the number of the folded tapes as in FIGS. 8 and 9 and/or having different cross-sectional areas by varying the size of the folded tapes as in FIG. 10; in each of the systems illustrated in FIGS. 8, 9, and 10, the folded tapes open at each plastic-to-plastic interface, as shown in FIG. 7. In such multi layers of folded tapes, the faces of the tapes are laminated metal-to-metal with any suitable adhesive 17, such as for example solvent-release polyethylene, rubber, polyester, polyvinyl chloride, or the like.
FIG. 11 illustrates an electrical cable comprising an outer jacket or sheath 18 made of an insulating material such as plastic, rubber, or the like, and a fourcompartment shielding tape 19, for example, as shown in FIGS. 6 and 7.
FIG. 12 illustrates an electrical cable comprising an outer jacket or sheath l8 and a six-compartment shielding tape 19, for example, as shown in FIG. 10.
The shielding tapes described herein may be spliced in any suitable manner as long as there is shielding continuity; thus there may be used, for example, an electrical continuity penetration clamp to join the conducting material and a plastic film to join the insulating material.
By shielding a conductor, pairs of conductors, or
groups of conductors as described above, maximum utilization of space and material weight is obtained; cable manufacturing speed is increased; the dual-foil encapsulation in several of the embodiments results in increased shielding effectiveness because of foilinterface reflectance; and foil corrosion is minimized in non-filled cable because moisture will not so readily reach the conductive foil.
Although there have been described preferred embodiments of this novel invention, many variations and modifications will now be apparent to those skilled in the art. This invention, therefore, is .to be limited not by the specific disclosure herein but only by the appended claims.
What is claimed is:
1. A shielding tape comprising in combination (a) a thin elongated flexible film of material having relatively high electrical resistance insulation characteristics and (b) a thin elongated flexible foil of material having relatively low electrical resistance characteristics and having one surface thereof bonded to one surface of said film (a) and being coextensive therewith, said shielding tape being folded along a longitudinally extending crease, thereby to be doubled in thickness, said thin foil (b) havinga thin layer of bonding material disposed on the surface thereof which is opposite to its said one surface bonded to said film (a), whereby a foil-to-foil connection is made by said thin layer of bonding material.
2. A shielding. tape comprising in combination (1) a plurality of folded laminates, each comprising (a) a thin elongated flexible film of material having relatively high electrical resistance insulation characteristics and (b) a thin elongated flexible foil of material having relatively low electrical resistance characterisitcs and having one surface thereof bonded to one surface of said film (a) and being coextensive therewith, each said laminate being folded along a longitudinally extending crease, thereby to be doubled in thickness and bringing the surface of said film (a) which is opposite its said onesurface into contact with itself, whereby the surface of said foil (b) forms outer opposite surfaces of said folded laminate and (2) insulation film layers bonded to and coextensive with both the top and the bottom foil surfaces of said plurality of folded laminates arranged fold-to-fold and foil-to-foil.

Claims (2)

1. A shielding tape comprising in combination (a) a thin elongated flexible film of material having relatively high electrical resistance insulation characteristics and (b) a thin elongated flexible foil of material having relatively low electrical resistance characteristics and having one surface thereof bonded to one surface of said film (a) and being coextensive therewith, said shielding tape being folded along a longitudinally extending crease, thereby to be doubled in thickness, said thin foil (b) having a thin layer of bonding material disposed on the surface thereof which is opposite to its said one surface bonded to said film (a), whereby a foil-to-foil connection is made by said thin layer of bonding material.
2. A shielding tape comprising in combination (1) a plurality of folded laminates, each comprising (a) a thin elongated flexible film of material having relatively high electrical resistance insulation characteristics and (b) a thin elongated flexible foil of material having relatively low electrical resistance characterisitcs and having one surface thereof bonded to one surface of said film (a) and being coextensive therewith, each said laminate being folded along a longitudinally extending crease, thereby to be doubled in thickness and bringing the surface of said film (a) which is opposite its said one surface into contact with itself, whereby the surface of said foil (b) forms outer opposite surfaces of said folded laminate and (2) insulation film layers bonded to and coextensive with both the top and the bottom foil surfaces of said plurality of folded laminates arranged fold-to-fold and foil-to-foil.
US38989373 1973-01-15 1973-08-20 Shielding tapes Expired - Lifetime US3848073A (en)

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US00323950A US3819443A (en) 1973-01-15 1973-01-15 Method for making multifinned shielding tapes
US38989373 US3848073A (en) 1973-01-15 1973-08-20 Shielding tapes

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Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2399041A1 (en) * 1977-07-25 1979-02-23 Sumitomo Electric Industries OPTICAL FIBER CABLES, CORRESPONDING METHOD AND APPARATUS
US4912283A (en) * 1988-01-05 1990-03-27 Kt Technologies Inc. Shielding tape for telecommunications cables and a cable including same
US4980225A (en) * 1988-07-12 1990-12-25 Sayles & Scheel Enterprises, Incorporated Conductive composition and method of use
US6310295B1 (en) * 1999-12-03 2001-10-30 Alcatel Low-crosstalk data cable and method of manufacturing
US6506976B1 (en) * 1999-09-14 2003-01-14 Avaya Technology Corp. Electrical cable apparatus and method for making
US20090236120A1 (en) * 2008-03-19 2009-09-24 David Allyn Wiebelhaus Separator tape for twisted pair in lan cable
US20090272571A1 (en) * 2008-04-30 2009-11-05 Tyco Electronics Corporation Cabling having shielding separators
US20100200269A1 (en) * 2009-02-11 2010-08-12 General Cable Technologies Corporation Separator for communication cable with shaped ends
US20100218973A1 (en) * 2009-01-30 2010-09-02 Camp Ii David P Separator for communication cable with geometric features
US20110017492A1 (en) * 2007-11-30 2011-01-27 Xu Hailong Separator structure for cat 6 cable
US20110247856A1 (en) * 2010-04-08 2011-10-13 Sumitomo Electric Industries, Ltd. Shielded cable
US9418775B2 (en) 2008-03-19 2016-08-16 Commscope, Inc. Of North Carolina Separator tape for twisted pair in LAN cable
US9978480B2 (en) 2008-03-19 2018-05-22 Commscope, Inc. Of North Carolina Separator tape for twisted pair in LAN cable
US11444397B2 (en) 2015-07-07 2022-09-13 Amphenol Fci Asia Pte. Ltd. Electrical connector with cavity between terminals
US11469553B2 (en) 2020-01-27 2022-10-11 Fci Usa Llc High speed connector
US11522310B2 (en) 2012-08-22 2022-12-06 Amphenol Corporation High-frequency electrical connector
US11539171B2 (en) 2016-08-23 2022-12-27 Amphenol Corporation Connector configurable for high performance
US11715914B2 (en) 2014-01-22 2023-08-01 Amphenol Corporation High speed, high density electrical connector with shielded signal paths
US11757224B2 (en) 2010-05-07 2023-09-12 Amphenol Corporation High performance cable connector
US11757215B2 (en) 2018-09-26 2023-09-12 Amphenol East Asia Electronic Technology (Shenzhen) Co., Ltd. High speed electrical connector and printed circuit board thereof
US11799246B2 (en) 2020-01-27 2023-10-24 Fci Usa Llc High speed connector
US11817655B2 (en) 2020-09-25 2023-11-14 Amphenol Commercial Products (Chengdu) Co., Ltd. Compact, high speed electrical connector
US11942716B2 (en) 2020-09-22 2024-03-26 Amphenol Commercial Products (Chengdu) Co., Ltd. High speed electrical connector

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US4912283A (en) * 1988-01-05 1990-03-27 Kt Technologies Inc. Shielding tape for telecommunications cables and a cable including same
US4980225A (en) * 1988-07-12 1990-12-25 Sayles & Scheel Enterprises, Incorporated Conductive composition and method of use
US6506976B1 (en) * 1999-09-14 2003-01-14 Avaya Technology Corp. Electrical cable apparatus and method for making
US6310295B1 (en) * 1999-12-03 2001-10-30 Alcatel Low-crosstalk data cable and method of manufacturing
US9048007B2 (en) * 2007-11-30 2015-06-02 Nexans Separator structure for Cat 6 cable
US20110017492A1 (en) * 2007-11-30 2011-01-27 Xu Hailong Separator structure for cat 6 cable
US11424052B2 (en) 2008-03-19 2022-08-23 Commscope, Inc. Of North Carolina Separator tape for twisted pair in LAN cable
US20090236120A1 (en) * 2008-03-19 2009-09-24 David Allyn Wiebelhaus Separator tape for twisted pair in lan cable
US9418775B2 (en) 2008-03-19 2016-08-16 Commscope, Inc. Of North Carolina Separator tape for twisted pair in LAN cable
US9978480B2 (en) 2008-03-19 2018-05-22 Commscope, Inc. Of North Carolina Separator tape for twisted pair in LAN cable
US10573430B2 (en) 2008-03-19 2020-02-25 Commscope, Inc. Of North Carolina Separator tape for twisted pair in LAN cable
US7999184B2 (en) 2008-03-19 2011-08-16 Commscope, Inc. Of North Carolina Separator tape for twisted pair in LAN cable
WO2009134360A1 (en) * 2008-04-30 2009-11-05 Tyco Electronics Corporation Cabling having shielding separators
US7834271B2 (en) 2008-04-30 2010-11-16 Tyco Electronics Corporation Cabling having shielding separators
US20090272571A1 (en) * 2008-04-30 2009-11-05 Tyco Electronics Corporation Cabling having shielding separators
US20100218973A1 (en) * 2009-01-30 2010-09-02 Camp Ii David P Separator for communication cable with geometric features
US20100200269A1 (en) * 2009-02-11 2010-08-12 General Cable Technologies Corporation Separator for communication cable with shaped ends
US8319104B2 (en) 2009-02-11 2012-11-27 General Cable Technologies Corporation Separator for communication cable with shaped ends
US9018530B2 (en) 2009-02-11 2015-04-28 General Cable Technologies Corporation Separator for communication cable with shaped ends
US20110247856A1 (en) * 2010-04-08 2011-10-13 Sumitomo Electric Industries, Ltd. Shielded cable
US11757224B2 (en) 2010-05-07 2023-09-12 Amphenol Corporation High performance cable connector
US11901663B2 (en) 2012-08-22 2024-02-13 Amphenol Corporation High-frequency electrical connector
US11522310B2 (en) 2012-08-22 2022-12-06 Amphenol Corporation High-frequency electrical connector
US11715914B2 (en) 2014-01-22 2023-08-01 Amphenol Corporation High speed, high density electrical connector with shielded signal paths
US11444397B2 (en) 2015-07-07 2022-09-13 Amphenol Fci Asia Pte. Ltd. Electrical connector with cavity between terminals
US11955742B2 (en) 2015-07-07 2024-04-09 Amphenol Fci Asia Pte. Ltd. Electrical connector with cavity between terminals
US11539171B2 (en) 2016-08-23 2022-12-27 Amphenol Corporation Connector configurable for high performance
US11757215B2 (en) 2018-09-26 2023-09-12 Amphenol East Asia Electronic Technology (Shenzhen) Co., Ltd. High speed electrical connector and printed circuit board thereof
US11469553B2 (en) 2020-01-27 2022-10-11 Fci Usa Llc High speed connector
US11817657B2 (en) 2020-01-27 2023-11-14 Fci Usa Llc High speed, high density direct mate orthogonal connector
US11799246B2 (en) 2020-01-27 2023-10-24 Fci Usa Llc High speed connector
US11469554B2 (en) 2020-01-27 2022-10-11 Fci Usa Llc High speed, high density direct mate orthogonal connector
US11942716B2 (en) 2020-09-22 2024-03-26 Amphenol Commercial Products (Chengdu) Co., Ltd. High speed electrical connector
US11817655B2 (en) 2020-09-25 2023-11-14 Amphenol Commercial Products (Chengdu) Co., Ltd. Compact, high speed electrical connector

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