APPARATUS FOR PREPARATION OF A CURED IN PLACE LINER HAVING AN INTEGRAL INNER IMPERMEABLE LAYER
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United States of America Patent
Stats
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N/A
Issued Date -
N/A
app pub date -
Jun 19, 2007
filing date -
Nov 7, 2003
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
An apparatus for preparation of a resin impregnated cured in place liner with an integral inner impermeable layer is provided. The liner is formed from a resin impregnable material having an impermeable layer bonded to one surface. The material is formed into tubular shape with the impermeable layer on the outside of the tube about a tubular forming member and continuously everted into the tubular forming device to place the impermeable layer on the inside. An outer impermeable film is placed about the inner tubular layer and may be impregnated with vacuum in the usual manner. Alternatively, the tubular resin impregnable material may be passed through a resin tank and impregnated with a curable resin prior to being wrapped with an outer impermeable layer. The impregnated liner is then suitable for pull-in-and-inflate which can be by steam in view of the integral inner impermeable layer of the liner.
First Claim
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