(19)
(11) EP 0 377 275 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
14.11.1990 Bulletin 1990/46

(43) Date of publication A2:
11.07.1990 Bulletin 1990/28

(21) Application number: 89311060.1

(22) Date of filing: 26.10.1989
(51) International Patent Classification (IPC)5: H01B 13/00, H01B 13/14
(84) Designated Contracting States:
BE CH DE ES FR IT LI LU NL SE

(30) Priority: 06.01.1989 GB 8900256

(71) Applicant: ASSOCIATED ELECTRICAL INDUSTRIES LIMITED
London W1A 1EH (GB)

(72) Inventors:
  • Murphy, Richard John
    Liverpool, L4 0RA (GB)
  • Ellis, Stephen John
    South Wirral Cheshire, L66 2XX (GB)

(74) Representative: Sperling, David (GB) 
87 Hendon Way
GB-London NW2 2LY
GB-London NW2 2LY (GB)


(56) References cited: : 
   
       


    (54) Insulated electric wire


    (57) Insulated electric wire is manufactured by the continuous extrusion of a tube of polymeric insulator (13), drawing an electric conductor (10) axially through the tube (13) the conductor drawing the tube to cause radial shrinkage of the tube onto the conductor, and directing cooling fluid (20) (via orifices 22, 23) at an intermediate portion (14) of the insulator tube so that the molecular orientation of the polymeric insulator is frozen and maintained. This reduces, and renders controllable, the force needed to strip the insulator.







    Search report