Fiber reinforced cured in place liner for lining an existing conduit and method of manufacture

A method for manufacturing a longitudinally reinforced tubular liner, comprising:

• providing an outer layer of an elongated strip of resin impregnable material;
• feeding a plurality of bundles of high-strength low-elongation fibers and disposing them longitudinally along the length of the outer resin impregnable layer in a region having a width substantially equal to the width of a flattened inner tube;
• providing an inner resin impregnable tube and longitudinally disposing the tube onto the reinforcing fiber bundles on the surface of the outer layer;
• feeding a plurality of bundles of high-strength low-elongation fibers and disposing them longitudinally along the length of the exposed surface of the inner resin impregnable tube;
• wrapping the edges of the outer layer into tubular form about the inner tube and fibers on the exposed surface;
• and
• joining the edges of the outer layer together.

An apparatus for forming a longitudinally reinforced flexible tubular liner, comprising:

• outer layer supply means for providing an elongated web of resin impregnable material for the outer layer of the reinforced tube;
• means for providing a plurality of fiber bundles;
• means for disposing the fiber bundles longitudinally onto the outer layer of resin impregnable material in a longitudinal strip on a portion of the exposed surface of the outer layer;
• inner resin impregnable tubes supply means for providing an inner tube of resin impregnable material to be disposed on the reinforcing fibers on the outer layer;
• means for providing a plurality of fiber bundles to be deposited longitudinally on the exposed surface of the inner tube;
• shaping means for bringing the edges of the outer layer about the inner tube;
• and
• joining means for joining the edges of the outer layer together.