Foldable electric cord arrangement and manufacture
OwnerJames C. Wanginventor
Life of this patent
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Abstract
The present invention relates to an elongated, foldable cable for the communication of electrical power from a source to an electrically powered device. The cable has an elongated electrical conductor, a first insulating material arranged about a first linear segment of the elongated electrical conductor and a second insulating material arranged about a second linear segment of the elongated electrical conductor. The first and second insulating materials are of different flexibility from one another whereby to enable folding on the materials of greater flexibility.
Claims8
An elongated cable for the communication of electrical power from a source to an electrically powered device, said cable being foldable at predetermined locations along its length and comprising:
- an elongated electrical conductor;
- a first segment of thermoplastic resinous insulating material arranged about a linear segment of said elongated electrical conductor;
- a second segment of thermoplastic resinous insulating material arranged about a second linear segment of said elongated electrical conductor, said first and second segments of insulating materials being different from one another, one of said first or second segments of insulating material being less stiff than a respective first or second segment of said insulating material.
A method of manufacturing an insulated electrical power cable with an insulator extruded therearound of alternating flexibility along its length, said cable being flexible at predetermined locations along its length, said method comprising the steps of arranging an extrusion head to receive a conductive wire therethrough;
- attaching a first and a second insulating material extruder in communication with said head, said first and second insulating material extruders each extruding first and second thermoplastic, resinous insulating materials of different flexibility from one another when first and second insulating materials are cured;
- directing said conductive wire through said head;
- and extruding said first and second insulating materials on said conductive wire to enclose alternating segments of the length of said conductive wire as said conductive wire is drawn from said head.
Dependencies are inferred from the claim text.