Toneable conduit and method of preparing same

  • US 7,279,643 B2
  • Filed: 05/22/2006
  • Issued: 10/09/2007
  • Est. Priority Date: 11/20/2001
  • Status: Active Grant
First Claim
Patent Images

1. A toneable conduit, comprising:

  • an elongate polymeric tube having a wall with an interior surface, an exterior surface, and a predetermined wall thickness; and

    a first channel extending longitudinally within the wall of the elongate polymeric tube; and

    a continuous wire coincident with the first channel in the elongate polymeric tube, said wire being coated with a coating composition that prevents the wire from adhering to the polymer melt used to form the polymeric tube;

    said continuous wire capable of transmitting a toning signal to allow the conduit to be detected by toning equipment and capable of being torn out of the polymeric tube and remaining continuous to allow the conduit and wire to be coupled.

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