COATED OPTICAL FIBER FOR AIR FEEDING AND AIR FEEDING METHOD OF COATED OPTICAL FIBER

摘要

PURPOSE:To provide a coated fiber for air feeding capable of feeding a relatively brittle a wire by air flow without stopping even in the bent part of a pipeline. CONSTITUTION:(A) is the section of the wire 1 which is formed by using two pieces of optical fibers 2 and applying a coating 4 thereon together with a tear cord 3. (B) is the section of the front end wire 5 which is formed by applying a coating 7 of a foamed polyethylene on a rod member 6 of nylon. The outside diameter of the wire 1 is 0.5mum and the outside diameter of the front end member 5 is 0.9mum. The outside diameter of the front end member is larger. The rigidity is higher with the front end member 5. The wire 1 is fed in a short period of time without stopping even at the bend of the pipeline when the wire 1 is mounted with the front end member 5 at 5cm and is fed into the pipeline by the air flow.