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Use of Aluminum Duct as Used with 'Hard Line' Coaxial Cable for Blown Fiber Microducts

IP.com Disclosure Number: IPCOM000103354D
Original Publication Date: 1990-Oct-01
Included in the Prior Art Database: 2005-Mar-17
Document File: 1 page(s) / 37K

Publishing Venue

IBM

Related People

Grune, GL: AUTHOR [+2]

Abstract

This invention involves the use of a unique concept for "blown" fiber cable/duct in use in the fiber optic cabling industry. "Blown" fiber cable refers to the use of a hollow tube or duct which is normally installed within the raceway of a building. Subsequent to installation, glass fibers capable of supporting light signals, are blown into the hollow tubes.

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Use of Aluminum Duct as Used with 'Hard Line' Coaxial Cable for Blown Fiber Microducts

      This invention involves the use of a unique concept for "blown"
fiber cable/duct in use in the fiber optic cabling industry.  "Blown"
fiber cable refers to the use of a hollow tube or duct which is
normally installed within the raceway of a building.  Subsequent to
installation, glass fibers capable of supporting light signals, are
blown into the hollow tubes.

      The hollow tubes within the outer duct or jacket, are normally
referred to as "microducts", and current use of these ducts requires
either polyethylene or polypropylene extrudate.  Plenum applications
have tried the use of other materials, such as fluorinated organics,
but have a very limited application due to cost and reduced
flexibility.

      The unique concept in this disclosure is the use of aluminum as
the "microduct" material of choice, perhaps using a thin inner
coating or polymer sheath for the "blown" fiber microduct system.
This inner sheath would allow for lubricity of the air compressed
blown fibers as they pass within the microducts.

      Fig. 1 illustrates the concept and idea, the first known use of
aluminum as microducts for this application.

      Disclosed anonymously.