Method of blowing cable into a duct
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United States of America Patent
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-
Nov 6, 2001
Grant Date -
N/A
app pub date -
Apr 28, 2000
filing date -
Apr 29, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In order to install an optical fiber cable 110 in a duct 112 a plurality of vents 130, 132, 134 spaced apart along the duct are operated such that during blowing any vent 130 upstream of the leading end 138 of the cable is closed and when there is at least one vent 132, 134 downstream of the cable leading end at least the downstream vent 132 closest to the cable leading end is open for venting gas from the duct. In this way the pressure decay and pressure gradient profiles are modified during installation to improve installation performance.
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