(19)
(11) EP 0 655 751 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
28.08.1996 Bulletin 1996/35

(43) Date of publication A2:
31.05.1995 Bulletin 1995/22

(21) Application number: 94308821.1

(22) Date of filing: 29.11.1994
(51) International Patent Classification (IPC)6: H01B 11/18
(84) Designated Contracting States:
DE FR GB IT SE

(30) Priority: 29.11.1993 JP 326313/93

(71) Applicant: JUNKOSHA CO. LTD.
Setagaya-ku Tokyo 156 (JP)

(72) Inventor:
  • Takeo, Monbara
    Iruma-City, Saitama (JP)

(74) Representative: Horner, Martin Grenville et al
Cruikshank & Fairweather 19 Royal Exchange Square
Glasgow G1 3AE Scotland
Glasgow G1 3AE Scotland (GB)

   


(54) A coaxial cable and core and a method for manufacturing the same


(57) The present invention comprises an electrical cable core with one or more of various electrical characteristics (such as the electrostatic capacity, characteristic impedance, and propagation delay time) controlled (e.g., made uniform) in the lengthwise direction of the cable, and a method for manufacturing the same. The invention further comprises a coaxial cable in which said core is used. This cable core is achieved by means of a computer that computes the difference in the event that a difference is produced between a specific predetermined electrostatic capacity per unit of length for the core and the measured value for electrostatic capacity per unit of length of the cable. If a difference is detected, extrusion apparatus applying a second dielectric layer is controlled by the control apparatus so that the thickness of the dielectric layer is modified to deliver the desired electrical properties.






Search report