US3625784A - Method of making a tubular member - Google Patents

Method of making a tubular member Download PDF

Info

Publication number
US3625784A
US3625784A US802087A US3625784DA US3625784A US 3625784 A US3625784 A US 3625784A US 802087 A US802087 A US 802087A US 3625784D A US3625784D A US 3625784DA US 3625784 A US3625784 A US 3625784A
Authority
US
United States
Prior art keywords
strip
plates
drawn
conductor
slot
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
US802087A
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 US3625784A publication Critical patent/US3625784A/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

Links

Images

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
    • 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
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
    • Y10T156/1007—Running or continuous length work
    • Y10T156/1008—Longitudinal bending

Definitions

  • U.S. Cl 156/54, AB$TRACT A xi r p f m t rial isformed into a spiral 156/200, 156/462, 174/111 shape having two overlapping layers by passing a flat strip Int. Cl ..1101b 13/10 through a series of apertured l men having particular Field 01 Search 174/111; shaped tapered passageways and slots.
  • the layers may be ap- 156/54, 462, 200 plied as insulation for conductors.
  • rr I s s a r 3r8 W-Y EPG -4 "-5 4-2 f T Y ne is 1 g l I ---1 -T-- PATENTEI] DEB 7 197i SHEET l UF 2 O Na Invenlor BEkNARD E. ASH
  • This invention relates to apparatus for rolling a flat strip of material laterally into a tubular-member having a spiral cross section with a minimum overlap of 360, and can be applied to the manufacture of insulated conductors.
  • a forming tool is thus required which allows the strip to follow its natural line over most of its path through the tool yet constrains the strip at intervals along the path in such a way that the desired forming operation takes place.
  • apparatus for rolling a flat strip of material laterally into a tubular member having a spiral cross section The material includes an inner layer and an outer layer which overlaps the inner layer by at least 360.
  • a plurality of narrow elements positioned at intervals along an axis, each having an aperture through which the axis passes, the apertures in a first group of adjacent elements being profiled so that they define a first tapering passageway with a slot in communication with the passageway along one side thereof, and the apertures in a second group of elements being profiled so that they define a second tapering passageway whose larger end envelopes the smaller end of the first passageway, the arrangement being such that when the strip of material is drawn through the elements along the axis the first group forms the inner layer of the tubular member leaving at least half the width of the strip outside the first passageway and projecting into the slot, and the second group wraps the remaining unformed width of the strip around the inner layer to form the outer layer, tension being maintained in the strip as
  • FIG. I is a side cross-sectional view of apparatus according to the invention.
  • FIG. 2 shows a plan view of each of the individual plates in the apparatus of FIG. 1;
  • FIGS. 3 and 4 are cross-sectional views of tubular members made by the apparatus of FIGS. 1 and 2.
  • the apparatus includes a base 1 to which are rigidly fixed a plurality of thin plates 2 to 8.
  • the plates are positioned perpendicular to an axis 9 and each plate has an aperture 10 therein through which the axis passes.
  • the apertures may be open, as in plates 2 to 5, or closed as in plates 6 to 8.
  • the plates 2 to 5 form a group whose apertures define a cone II and a slot 11a in communication with one side of the cone.
  • the plates 6 to 8 form a second group the apertures of which define a cone 12 whose larger end envelopes the smaller end of the cone 11,.
  • a strip of material to be formed into a tube is drawn in the direction of the arrow along the axis 9.
  • the plates 2 to 5 form the inner layer of the complete tubular member, back tension being applied to the strip so that at least half the width of the strip projects into the slot and is prevented from entering the cone ll.
  • the plates 6 to 8 wrap the projecting width of the strip around the inner layer to form the outer layer.
  • cross sections 13 of the strip are shown schematically as it passes through the plates 2 to 6, and an enlarged cross section of the strip as it emerges from the plate 8 is shown in FIG. 3.
  • the shape of the plates correspond to the cross sections of the equivalent solid die, but in some plates further superfluous material has been removed from where it would contact the strip to leave the minimum necessary to carry out the forming operation. This further reduces the friction between the apparatus and the strip.
  • Plate 5 is such a plate where the maximum amount of material has been removed from contact with the strip.
  • a suitable material for the plates is tungsten carbide.
  • the apertures 10 have been shown as defining regular cones 11 and 12. In some cases, to reduce friction still further, the apertures may be designed to define tapering passageways other than regular cones.
  • the apparatus may be used, for example, to insulate a wire conductor with a paper strip.
  • One edge of the strip is coated on one face with adhesive, e.g., a starch based paste, prior to the passage of the strip through the apparatus.
  • the strip is drawn through the apparatus with the coated edge 14a outside the cone 11, and on the opposite side of the strip to that against the respective edges 14 of the plates 2 to 4.
  • the wire conductor is drawn through the apparatus at the same time as the strip with the strip located between the wire and the edges of the apertures. Forward tension to draw the insulated conductor through the apparatus may be applied in the manner described in our copending application Ser. No. 589,108 filed Oct. 24, 1966 and assigned to the same assignee as the instant application.
  • the insulated conductor is wound round a capstan with the outer edge of the paper strip between the capstan and the conductor. Radial pressure is applied to the overlapping edge for such time as is necessary for the paste to set.
  • the portion of the width of the paper strip which forms the inner layer of the insulation may be longitudinally corrugated prior to drawing the strip through the apparatus.
  • the corrugations are produced by passing the paper between six pairs of rollers, each successive pair having one more corrugation form. When formed around the wire and enclosed in an outer layer, the corrugations form a relatively rigid support for the wire.
  • a method of making a tubular member from a flat member comprising positioning a plurality of apertured guides at intervals along an axis to define successive first and second rounded tapering passageways with the larger end of the second passageway enveloping the smaller end of the first passageway, the first passageway having a slot formed along one side, drawing a flat strip of material along the axis through said passageways with a portion of the width of the strip within the first passageway and a portion projecting into the slot and maintaining tension in the strip as it passes into the apertures so that the portion of the strip within the first passageway is spirally wound to form an inner layer and the portion of the strip projecting into the slot is prevented from entering the first passageway and thereafter enters the second passageway to be spirally wrapped around the inner layer to fonn an overlapping outer layer.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Insulating Bodies (AREA)
  • Processes Specially Adapted For Manufacturing Cables (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Extrusion Of Metal (AREA)
  • Insulated Conductors (AREA)
US802087A 1968-03-07 1969-02-25 Method of making a tubular member Expired - Lifetime US3625784A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB01049/68A GB1176605A (en) 1968-03-07 1968-03-07 Method and apparatus for rolling a flat strip of material laterally into a tubular member.

Publications (1)

Publication Number Publication Date
US3625784A true US3625784A (en) 1971-12-07

Family

ID=9979069

Family Applications (1)

Application Number Title Priority Date Filing Date
US802087A Expired - Lifetime US3625784A (en) 1968-03-07 1969-02-25 Method of making a tubular member

Country Status (9)

Country Link
US (1) US3625784A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS4825593B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BE (1) BE729781A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BR (1) BR6906958D0 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH (1) CH487734A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE1908311B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
ES (1) ES364444A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2003434A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1176605A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5286992U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1975-12-20 1977-06-29
GB2258644A (en) * 1991-08-05 1993-02-17 Pirelli General Plc Wrapping tape about core
CN113443505B (zh) * 2021-05-14 2022-10-25 长飞光纤光缆股份有限公司 一种骨架式光缆的缆芯成缆设备及方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR872741A (fr) * 1940-05-29 1942-06-17 Hermes Patentverwertungs Gmbh Procédé de fabrication d'enveloppes ou de revêtements spiralés en rubans isolants ou métalliques pour conducteurs électriques en tous genres
US2406051A (en) * 1943-06-26 1946-08-20 Paul Porzelt Apparatus for producing corrugated structures
US3340113A (en) * 1964-11-09 1967-09-05 Anaconda Wire & Cable Co Apparatus and method for applying tape to advancing strands
US3360409A (en) * 1958-04-07 1967-12-26 Gen Cable Corp Method of making low resistance composite corrugated welded sheath for telephone cables

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR872741A (fr) * 1940-05-29 1942-06-17 Hermes Patentverwertungs Gmbh Procédé de fabrication d'enveloppes ou de revêtements spiralés en rubans isolants ou métalliques pour conducteurs électriques en tous genres
US2406051A (en) * 1943-06-26 1946-08-20 Paul Porzelt Apparatus for producing corrugated structures
US3360409A (en) * 1958-04-07 1967-12-26 Gen Cable Corp Method of making low resistance composite corrugated welded sheath for telephone cables
US3340113A (en) * 1964-11-09 1967-09-05 Anaconda Wire & Cable Co Apparatus and method for applying tape to advancing strands

Also Published As

Publication number Publication date
JPS4825593B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1973-07-30
GB1176605A (en) 1970-01-07
DE1908311B2 (de) 1972-03-30
BE729781A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1969-09-15
BR6906958D0 (pt) 1973-01-09
DE1908311A1 (de) 1969-10-09
ES364444A1 (es) 1971-02-01
CH487734A (de) 1970-03-31
FR2003434A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1969-11-07

Similar Documents

Publication Publication Date Title
US2997519A (en) Multicoaxial line cables
US4083484A (en) Process and apparatus for manufacturing flexible shielded coaxial cable
US3649744A (en) Service entrance cable with preformed fiberglass tape
US3905090A (en) Method of making spiral wound gaskets
KR890002904A (ko) 주름진 격막을 가진 케이블과 그 형성 방법
EP0349778A3 (en) A corrugated pipe, a method of forming the corrugated pipe and an apparatus for manufacturing the same
US4758685A (en) Flexible coaxial cable and method of making same
JPS58188008A (ja) 高耐熱性プラスチツクからなる巻付け−及び絶縁バンド
US3634606A (en) Outer conductor for coaxial cable
FI63302C (fi) Laongstraeckt cylindrisk kropp speciellt en elektrisk eller opisk kabel och apparat foer anvaendning vid framstaellning env en saodan kropp
US4011118A (en) Method of manufacturing a coaxial cable, and coaxial cable made by this method
US2018477A (en) Coaxial conductor system
US2727297A (en) Method of making wound condensers
US3625784A (en) Method of making a tubular member
US2556187A (en) Flexible waveguide with spaced conducting sections and method of making the same
JPS6246927B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
US5143897A (en) Flexible, high temperature superconductive cables
US2606953A (en) High-frequency coaxial cable outer conductor
JPH0146754B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
US2533716A (en) Electrical condenser
GB1479256A (en) Microwave horns
US3306793A (en) Method of making coaxial cables
US3201507A (en) Hollow conductor for power cables
US3482154A (en) Series film capacitor and method of fabrication
US2395872A (en) Air-space insulated conductor

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