Method of preparing cured in place liner using resin impregnation tower
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United States of America Patent
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Jul 3, 2007
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N/A
app pub date -
Nov 7, 2003
filing date -
Nov 7, 2003
priority date (Note) -
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Abstract
A non-pressurized resin impregnation tower for continuously impregnating the resin impregnable layer of a tubular cured in place liner is provided. The tower is at a height to provide sufficient resin pressure head to impregnate the resin impregnable layer fully. The resin impregnated tube is fed into the top of the tower, drawn down about a roller at the bottom, removed from the top of the tower and then wrapped with an outer impermeable coating. The impregnated liner is suitable for pull-in-and-inflate method of installation or may be everted. For liners formed with an inner impermeable layer, the liner is suitable for curing with steam.
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