Resin impregnation tower for cured in place liner
OwnerFranklin Driver, Weiping Wanginventors
Life of this patent
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Abstract
A resin impregnation tower for continuously impregnating the resin impregnable layer of a tubular cured in place liner is provided. The tower is of a height to provide sufficient resin pressure head to impregnate the resin impregnable layer fully. A cured in place liner having at least one layer of resin impregnable material 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 inverted. For liners formed with an inner impermeable layer, the liner is suitable for curing with steam.
Claims20
An apparatus for impregnating a resin impregnable material, comprising an enclosed vertical column of sufficient height to impregnate the resin impregnable material, the column having an upper portion and a lower portion, the tubular material to be fed into the upper portion of the column to the lower portion and removed from the upper portion of the column after passing through resin therein.
An apparatus for impregnating a tubular resin impregnable material, comprising a hollow vertical tower of sufficient height to impregnate the resin impregnable material, the tower having a roller at a lower portion for changing direction of the tubular material as it is fed into the upper portion of the column to the lower portion and removed from the upper portion of the column after passing through resin in the tower.
A resin impregnation tower for impregnating a cured in place liner including at least one layer of resin impregnable material comprising a vertical column of sufficient height to impregnate the resin impregnable layer, the column having a roller at a lower portion for changing direction of the tubular material as it is fed into the upper portion of the column to the lower portion and pulled out of the upper portion of the column after passing through resin in the tower.
Dependencies are inferred from the claim text.