US3530018A - Method of manufacturing an insulated electrical conductor - Google Patents

Method of manufacturing an insulated electrical conductor Download PDF

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Publication number
US3530018A
US3530018A US589108A US3530018DA US3530018A US 3530018 A US3530018 A US 3530018A US 589108 A US589108 A US 589108A US 3530018D A US3530018D A US 3530018DA US 3530018 A US3530018 A US 3530018A
Authority
US
United States
Prior art keywords
strip
conductor
electrical conductor
overlapping
manufacturing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US589108A
Other languages
English (en)
Inventor
Bernard Edwin Ash
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
STC PLC
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Application granted granted Critical
Publication of US3530018A publication Critical patent/US3530018A/en
Assigned to STC PLC reassignment STC PLC ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: INTERNATIONAL STANDARD ELECTRIC CORPORATION, A DE CORP.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • H01B13/06—Insulating conductors or cables
    • H01B13/10—Insulating conductors or cables by longitudinal lapping

Definitions

  • This invention relates to a method of manufacturing an insulated electrical conductor, and particularly an electrical conductor insulated with paper.
  • adhesive is applied to one edge of a strip of paper which is then formed into a tube around the conductor with'the edges of the strip overlapping.
  • a method of manufacturing an insulated electrical conductor which comprises the steps of applying an adhesive coating lengthwise to at least a portion of one face of a strip of insulating material, then forming the strip into a tube round the electrical conductor with the edges of the strip overlapping and with said coating between the overlapping portions, and thereafter passing the conductor round a rotating pulley with the overlapping portions pressed between the conductor and the circumference of the pulley for at least the time period required for the coating to set sufliciently to prevent the overlapping portions from springing apart.
  • FIG. 1 shows an embodiment of apparatus for manufacturing an insulated electrical conductor
  • FIG. 2 shows in more detail a die shown in FIG. 1.
  • a strip of insulating material 1 for example paper, is coated with adhesive along the edge 2 of its uppermost surface by moving it past a screw fed extruder 3 for applying an adhesive coating from a reservoir tube 4;
  • a suitable adhesive substance in the case of paper is a starch based paste.
  • the rate of extrusion of the adhesive substance is adjusted to correspond to the rate at which the insulating strip is moving.
  • the insulating strip is then passed together with an electrical conducting wire 5 to the inlet 6 of a die 7.
  • the die is shown in greater detail in FIG. 2.
  • the inlet of the die is of oblong shape with the shorter sides of the oblong well rounded and with a step in one of the longer sides.
  • the insulating strip is inserted in the inlet so that the side with the step faces towards the coated edge of the strip.
  • the passage in the die tapers towards a circular outlet 8, so that an insulating strip, on being fed through this passage together with a wire, is gradually formed into a tube round the wire and emerges with the coated edge portion 2 overlapping a portion of the strip, the coating being between the overlapping portions adjacent the other edge of the strip.
  • the angular position of the residual strip near the circular outlet is chosen so the seam in the emerging paper tube is positioned between the wire and a pulley 9, which rotates in the direction indicated by the arrow in FIG. 7 and which is used as a capstan to haul the insulating strip and wire through the die.
  • the diameter of the capstan and the number of turns of insulated wire round the capstan are chosen so that each portion of insulated wire makes contact with the capstan, i.e. pressure is applied to the seam in the paper tube for a time period at least equal to the time required for the adhesive to set.
  • the distance between the outlet from the die and the capstan is preferably kept as short as possible to reduce the risk of unrolling of the paper tube before it reaches the capstan.
  • a method of manufacturing an insulated electrical conductor which comprises the steps of applying an adhesive coating lengthwise to an edge portion of one face of a strip of insulating material, then forming the strip into a tube round the electrical conductor with the edges of the strip overlapping to form a seam and with said coating between the overlapping edges, and thereafter passing the conductor round a rotating pulley with the overlapping edges positioned to be pressed between the conductor and the circumference of the pulley for at least the time period required for the coating to set sufficiently to prevent the overlapping edges from springing apart.
  • Apparatus for manufacturing an insulated electrical conductor comprising means for applying an adhesive coating lengthwise to an edge portion of one face of a strip of insulating material, means for forming the strip into a tube around the electrical conductor with the edges of the strip overlapping to form a seam and with said coating between the overlapping edges, and. rotating pulley means drawing the conductor from the forming means with the overlapping edges positioned to be pressed between the conductor and the circumference of the pulley for a time required for the coating to set and prevent the overlapping edges from separating.
  • said forming means includes a die having an elongated opening at one end with rounded short sides and a circular opening at the other end, said elongated opening including a step in one of the long sides to position the edges of the strip in an overlapping relation between said conductor and pulley.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Insulating Bodies (AREA)
  • Manufacturing Of Electric Cables (AREA)
  • Making Paper Articles (AREA)
  • Geophysics And Detection Of Objects (AREA)
US589108A 1965-11-23 1966-10-24 Method of manufacturing an insulated electrical conductor Expired - Lifetime US3530018A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB49638/65A GB1059438A (en) 1965-11-23 1965-11-23 Method of manufacturing an insulated electrical conductor

Publications (1)

Publication Number Publication Date
US3530018A true US3530018A (en) 1970-09-22

Family

ID=10453041

Family Applications (1)

Application Number Title Priority Date Filing Date
US589108A Expired - Lifetime US3530018A (en) 1965-11-23 1966-10-24 Method of manufacturing an insulated electrical conductor

Country Status (9)

Country Link
US (1) US3530018A (OSRAM)
AT (1) AT283483B (OSRAM)
BE (1) BE690050A (OSRAM)
BR (1) BR6684809D0 (OSRAM)
CH (1) CH454987A (OSRAM)
DE (1) DE1640494B1 (OSRAM)
ES (1) ES333654A1 (OSRAM)
GB (1) GB1059438A (OSRAM)
NO (1) NO122081B (OSRAM)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3763554A (en) * 1971-12-15 1973-10-09 Bell Telephone Labor Inc Wire insulation formed from pleated sheet material and method of manufacture
US3902938A (en) * 1972-03-02 1975-09-02 Ford Motor Co Process for continuously covering a linear element
US4477298A (en) * 1981-04-24 1984-10-16 At&T Technologies, Inc. Cable shielding method and apparatus

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2448771A2 (fr) * 1979-02-12 1980-09-05 Lignes Telegraph Telephon Procede de fabrication de cables coaxiaux et machine de mise en oeuvre
FR2451619A1 (fr) * 1979-03-12 1980-10-10 Lignes Telegraph Telephon Procede de fabrication de paires coaxiales et paires coaxiales ainsi fabriquees
ES2121661B1 (es) * 1995-04-07 1999-06-01 Hispano Portuguesa De Bobinado Proceso de fabricacion de bobinas desmagnetizadoras.
FR2743187B1 (fr) * 1995-12-29 1998-02-20 Plasto Sa Dispositif de gainage pour faisceaux de fils, notamment pour l'automobile

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1945709A (en) * 1930-09-26 1934-02-06 Simons Paul Method and means for insulating electric conductors
US2494050A (en) * 1946-05-23 1950-01-10 Western Electric Co Method and apparatus for applying tapes to cables

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1011026B (de) * 1952-09-26 1957-06-27 Siemens Ag Verfahren zum Isolieren elektrischer Leiter, Kabel, Straenge od. dgl.
DE1164529B (de) * 1962-05-25 1964-03-05 Siemens Ag Verfahren zur Laengsaufbringung eines Isolierstoffbandes auf einen langgestreckten Kern, insbesondere eines Korrosionsschutzbandes auf einen Kabelmantel
US3206541A (en) * 1963-04-29 1965-09-14 Gen Cable Corp Sheathed electrical cable
US3332138A (en) * 1965-08-11 1967-07-25 Gen Cable Corp Method and apparatus for making precision sized tubing

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1945709A (en) * 1930-09-26 1934-02-06 Simons Paul Method and means for insulating electric conductors
US2494050A (en) * 1946-05-23 1950-01-10 Western Electric Co Method and apparatus for applying tapes to cables

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3763554A (en) * 1971-12-15 1973-10-09 Bell Telephone Labor Inc Wire insulation formed from pleated sheet material and method of manufacture
US3902938A (en) * 1972-03-02 1975-09-02 Ford Motor Co Process for continuously covering a linear element
US4477298A (en) * 1981-04-24 1984-10-16 At&T Technologies, Inc. Cable shielding method and apparatus

Also Published As

Publication number Publication date
CH454987A (de) 1968-04-30
GB1059438A (en) 1967-02-22
BR6684809D0 (pt) 1973-12-27
AT283483B (de) 1970-08-10
NO122081B (OSRAM) 1971-05-18
BE690050A (OSRAM) 1967-05-23
ES333654A1 (es) 1967-10-01
DE1640494B1 (de) 1971-09-16

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Legal Events

Date Code Title Description
AS Assignment

Owner name: STC PLC,ENGLAND

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:INTERNATIONAL STANDARD ELECTRIC CORPORATION, A DE CORP.;REEL/FRAME:004761/0721

Effective date: 19870423

Owner name: STC PLC, 10 MALTRAVERS STREET, LONDON, WC2R 3HA, E

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:INTERNATIONAL STANDARD ELECTRIC CORPORATION, A DE CORP.;REEL/FRAME:004761/0721

Effective date: 19870423