US2885739A - Methods and apparatus for color coding electric conductors - Google Patents

Methods and apparatus for color coding electric conductors Download PDF

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Publication number
US2885739A
US2885739A US667427A US66742757A US2885739A US 2885739 A US2885739 A US 2885739A US 667427 A US667427 A US 667427A US 66742757 A US66742757 A US 66742757A US 2885739 A US2885739 A US 2885739A
Authority
US
United States
Prior art keywords
preform
barrel
color coding
methods
mold
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
US667427A
Other languages
English (en)
Inventor
Karel J Staller
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.)
TDK Micronas GmbH
International Telephone and Telegraph Corp
Original Assignee
Deutsche ITT Industries GmbH
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
Priority to NL228951D priority Critical patent/NL228951A/xx
Priority to NL99434D priority patent/NL99434C/xx
Application filed by Deutsche ITT Industries GmbH filed Critical Deutsche ITT Industries GmbH
Priority to US667427A priority patent/US2885739A/en
Priority to ES0241266A priority patent/ES241266A1/es
Priority to FR1203080D priority patent/FR1203080A/fr
Priority to GB19824/58A priority patent/GB838580A/en
Priority to CH359179D priority patent/CH359179A/de
Application granted granted Critical
Publication of US2885739A publication Critical patent/US2885739A/en
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
    • H01B13/14—Insulating conductors or cables by extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/05—Filamentary, e.g. strands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/06—Rod-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/19—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their edges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/20—Articles comprising two or more components, e.g. co-extruded layers the components being layers one of the layers being a strip, e.g. a partially embedded strip
    • 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
    • H01B7/36—Insulated conductors or cables characterised by their form with distinguishing or length marks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
    • B29K2027/12—Use of polyvinylhalogenides or derivatives thereof as moulding material containing fluorine
    • B29K2027/18—PTFE, i.e. polytetrafluorethene, e.g. ePTFE, i.e. expanded polytetrafluorethene

Definitions

  • Fig. 1 is a part sectional view of a device used for making the preforms
  • Fig. 2 is a perspective view of a preform incorporating two color coding helices
  • Fig. 3 is a schematic view of an alternative apparatus for making the preforms.
  • Fig. 4 is a section of an extrusion head for use in practising the invention.
  • a helix 1 wound from an uncured thread or ice string of colored Teflon is placed in a cylindrical barrel 2 within which is centrally mounted a rod 3.
  • Two or more differently colored helices with their respective turns interleaved may, of course, be inserted in the barrel if it is desired to provide a plural-color coding on the insulated wire.
  • Lubricated Teflon mix is then poured into the barrel 2 and the contents compressed by means of a ram 4 which is formed with a central bore 5 into which the rod 3 passes as the pressure is applied. Due to the compression of the mixture in the barrel 2, the pitch of the helix 1 will be correspondingly reduced.
  • the bottom plate 6 of the barrel 2 may be removed and the preform ejected.
  • Fig. 2 shows a preform made in the above-described manner and having two differently colored helical inlays 7 and 8 in its cylindrical surface and hole 9 passing through its axis.
  • Fig. 3 illustrates schematically an alternative method of making the color coded preform.
  • the natural and colored Teflon mixes are fed into a cylindrical barrel 10 via a pair of concentric funnels 11, 12, which are mounted so as to be rotated together about their axis by any suitable means, such as the gear train 13 and pulley belt 14.
  • the spouts -of the funnels 11 and 12 are arranged along different radii, that of the funnel 12 beingelongated' and extending substan tially over the whole radius of the internal dimension of the cylindrical barrel 10, and that of the funnel 11 being of small diameter and located only adjacent the periphery of the interior cylindrical surface.
  • the natural Teflon mix and the colored Teflon powder are fed into the funnels 12 and 11, respectively, via chutes 15 and 16, which are preferably vibrated by any suitable vibrator means 17, whereby the powder is agitated in order to assist its flow into the funnels.
  • a lead screw 18 rotated through the gear train 13 and passing through a threaded hole in the base 19 may be provided to lower the barrel 10 as the funnels 11, 12 are rotated.
  • the funnels may be stationary and the barrel 10 may be simultaneously rotated and lowered.
  • a thin stream of colored powder falling from the spout of the funnel 11 will be covered by a layer of the natural Teflon mix and will form a helical thread of coloring material on the outer surface of the cylindrical preform, after the powder in the barrel 10 has been compressed by a ram as described with reference to Fig. 1.
  • the shaft 20 on which the funnels 11, 12 are mounted may extend through the entire length of the barrel 10 to form the axial hole 9 (Fig. 2) in the preform.
  • Fig. 4 shows an extrusion head for use with the preforms and comprising a cylindrical barrel portion 21, a die portion 22 and a tip 23.
  • a tube 24, the upper end 25 of which has a reduced diameter, is secured as by the nuts 26 to the bottom plate 27 of the barrel 21.
  • a hollow needle 28 having a small degree of flexibility is screwed into the reduced end 25 of the tube 24, the lower main portion of which has the same exterior diameter as the diameter of the axial hole in the Teflon mix preform.
  • the conductor 29 over which the Teflon is to be extruded is threaded through the bore of the tube 24 and of the needle 28 and the orifice of the die tip 23.
  • a removable collar 30 is adapted to hold together the die portion 22 and the barrel portion 21. It will be noted that the interior upper surface 31 of the die portion 22 is streamlined to assist the flow of the Teflon under pressure.
  • a ram 32 having an axial bore is made to have a sliding fit over the tube 24. Any suitable means may be provided for injecting the ram into the barrel. As shown, the re Jerusalem end of the ram 32 is cut with a lead screw thread 33 over which is threaded an internally threaded worm wheel 34 which is held against axial movement by brackets 35 mounted on the interior surface of the lower portion of the barrel 21. A worm 36 which projects through the wall of the barrel engages the teeth of the worm wheel 34.
  • the collar 30 is removed and the die portion 22 is separated from the barrel 21.
  • a preform as shown in Fig. 2 is slipped over the needle 28 and the end of the tube 24.
  • the die portion 22 is then replaced and the ram 32 is injected by rotating the worm 36 thereby compressing the preform and forcing the mix into the die 22 and causing it to flow over and around the conductor 29 at the orifice of the die tip 23.
  • extruder head of Fig. 4 is shown merely by way of example and that other forms of extruder heads may be used with the preform.
  • insert of material used in the specification and claims, is meant a surface inlay of the material or an impregnant either of which may be in the form of continuous helical strips, dotted or broken lines, or other code indication.
  • the method of making a preform of two contrasting colors which comprises pouring a first stream of powder of one color into a cylindrical mold across a radial dimension of said mold, simultaneously therewith pouring into said mold adjacent the periphery thereof a fine stream of a material of a difierent color, producing relative rotation between said mold and said streams and compressing the contents of said mold.
  • An apparatus for making the preform according to claim 1, comprising a cylindrical mold, first funnel means positioned above said mold and having a spout opening extending radially across said mold, second funnel means positioned above said mold and having a spout with a small aperture located at the outer end of a radius of said mold, means for injecting differently colored powders respectively into said first and second funnel means, means for effecting a relative rotation between said two funnel means and said mold and means for effecting a relative movement between said two funnel means and said mold in the direction of the axis of said mold.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Of Electric Cables (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
US667427A 1957-06-24 1957-06-24 Methods and apparatus for color coding electric conductors Expired - Lifetime US2885739A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
NL228951D NL228951A (en, 2012) 1957-06-24
NL99434D NL99434C (en, 2012) 1957-06-24
US667427A US2885739A (en) 1957-06-24 1957-06-24 Methods and apparatus for color coding electric conductors
ES0241266A ES241266A1 (es) 1957-06-24 1958-04-11 Procedimiento y aparato para codificar en color conductores eléctricos
FR1203080D FR1203080A (fr) 1957-06-24 1958-06-19 Perfectionnements aux câbles électriques isolés
GB19824/58A GB838580A (en) 1957-06-24 1958-06-20 Methods and apparatus for colour coding electric conductors
CH359179D CH359179A (de) 1957-06-24 1958-06-24 Verfahren und Einrichtung zur Herstellung von mit einer farbig markierten Isolation versehenen elektrischen Leitern

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US667427A US2885739A (en) 1957-06-24 1957-06-24 Methods and apparatus for color coding electric conductors

Publications (1)

Publication Number Publication Date
US2885739A true US2885739A (en) 1959-05-12

Family

ID=24678172

Family Applications (1)

Application Number Title Priority Date Filing Date
US667427A Expired - Lifetime US2885739A (en) 1957-06-24 1957-06-24 Methods and apparatus for color coding electric conductors

Country Status (6)

Country Link
US (1) US2885739A (en, 2012)
CH (1) CH359179A (en, 2012)
ES (1) ES241266A1 (en, 2012)
FR (1) FR1203080A (en, 2012)
GB (1) GB838580A (en, 2012)
NL (2) NL99434C (en, 2012)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2990582A (en) * 1959-04-01 1961-07-04 Gen Electric Color striping of polytetrafluoroethylene resin
US3046603A (en) * 1958-02-24 1962-07-31 Research Corp Method and apparatus for extrusion
US7954530B1 (en) 2009-01-30 2011-06-07 Encore Wire Corporation Method and apparatus for applying labels to cable or conduit
US8826960B1 (en) 2009-06-15 2014-09-09 Encore Wire Corporation System and apparatus for applying labels to cable or conduit
US9409668B1 (en) 2007-06-04 2016-08-09 Encore Wire Corporation Method and apparatus for applying labels to cable
US11319104B1 (en) 2009-01-30 2022-05-03 Encore Wire Corporation System and apparatus for applying labels to cable or conduit
CN116175921A (zh) * 2023-02-03 2023-05-30 东莞金信诺电子有限公司 一种聚四氟乙烯多色坯料制作方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2169665A (en) * 1936-07-25 1939-08-15 Skolaude Heinrich Production of pressed articles having a pattern extending right through them from materials in powder form
US2573050A (en) * 1948-12-03 1951-10-30 Nixon Nitration Works Method of extruding plastic rods having a spiral design
US2636370A (en) * 1948-12-11 1953-04-28 Gideon A Kramer Method of decorating candles and the product thereof
US2685707A (en) * 1950-06-30 1954-08-10 Du Pont Extrusion of tetrafluoroethylene polymer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2169665A (en) * 1936-07-25 1939-08-15 Skolaude Heinrich Production of pressed articles having a pattern extending right through them from materials in powder form
US2573050A (en) * 1948-12-03 1951-10-30 Nixon Nitration Works Method of extruding plastic rods having a spiral design
US2636370A (en) * 1948-12-11 1953-04-28 Gideon A Kramer Method of decorating candles and the product thereof
US2685707A (en) * 1950-06-30 1954-08-10 Du Pont Extrusion of tetrafluoroethylene polymer

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3046603A (en) * 1958-02-24 1962-07-31 Research Corp Method and apparatus for extrusion
US2990582A (en) * 1959-04-01 1961-07-04 Gen Electric Color striping of polytetrafluoroethylene resin
US10272616B1 (en) 2007-06-04 2019-04-30 Encore Wire Corporation Method and apparatus for applying labels to cable
US11498715B1 (en) 2007-06-04 2022-11-15 Encore Wire Corporation Method and apparatus for applying labels to cable
US11827409B1 (en) 2007-06-04 2023-11-28 Encore Wire Corporation Method and apparatus for applying labels to cable
US11667085B1 (en) 2007-06-04 2023-06-06 Encore Wire Corporation Method and apparatus for applying labels to cable
US9409668B1 (en) 2007-06-04 2016-08-09 Encore Wire Corporation Method and apparatus for applying labels to cable
US11247404B1 (en) 2007-06-04 2022-02-15 Encore Wire Corporation Method and apparatus for applying labels to cable
US9452856B1 (en) 2007-06-04 2016-09-27 Encore Wire Corporation Method and apparatus for applying labels to cable
US10759558B1 (en) 2007-06-04 2020-09-01 Encore Wire Corporation Method and apparatus for applying labels to cable
US10046879B1 (en) 2007-06-04 2018-08-14 Encore Wire Corporation Method and apparatus for applying labels to cable
US9321548B1 (en) 2009-01-30 2016-04-26 Encore Wire Corporation Method for applying labels to cable or conduit
US11851233B1 (en) 2009-01-30 2023-12-26 Encore Wire Corporation System and apparatus for applying labels to cable or conduit
US10035618B1 (en) 2009-01-30 2018-07-31 Encore Wire Corporation System and apparatus for applying labels to cable or conduit
US9950826B1 (en) 2009-01-30 2018-04-24 Encore Wire Corporation Method for applying labels to cable or conduit
US10906685B1 (en) 2009-01-30 2021-02-02 Encore Wire Corporation Method for applying labels to cable or conduit
US10654607B1 (en) 2009-01-30 2020-05-19 Encore Wire Corporation System and apparatus for applying labels to cable or conduit
US12091207B1 (en) 2009-01-30 2024-09-17 Encore Wire Corporation Method for applying labels to cable or conduit
US7954530B1 (en) 2009-01-30 2011-06-07 Encore Wire Corporation Method and apparatus for applying labels to cable or conduit
US8454785B1 (en) 2009-01-30 2013-06-04 Encore Wire Corporation Method for applying labels to cable or conduit
US11319104B1 (en) 2009-01-30 2022-05-03 Encore Wire Corporation System and apparatus for applying labels to cable or conduit
US11673702B1 (en) 2009-01-30 2023-06-13 Encore Wire Corporation Method for applying labels to cable or conduit
US9446877B1 (en) 2009-01-30 2016-09-20 Encore Wire Corporation System and apparatus for applying labels to cable or conduit
US8826960B1 (en) 2009-06-15 2014-09-09 Encore Wire Corporation System and apparatus for applying labels to cable or conduit
CN116175921A (zh) * 2023-02-03 2023-05-30 东莞金信诺电子有限公司 一种聚四氟乙烯多色坯料制作方法

Also Published As

Publication number Publication date
NL228951A (en, 2012) 1900-01-01
FR1203080A (fr) 1960-01-15
GB838580A (en) 1960-06-22
ES241266A1 (es) 1958-07-16
CH359179A (de) 1961-12-31
NL99434C (en, 2012) 1900-01-01

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