Insituform (Netherlands) B.v.

Edward Peter Smith

A method and apparatus for forming sealed and reinforced holes through the end of a flexible, resin-impregnable, tubular pipe liner for securing a cable thereto and for sealing the end of the liner. The liner is installed into an existing conduit either by pulling a cable secured to holes at the front end of the liner or by eversion of the liner while securing a hold-back cable to holes at the trailing end of the everting liner. Holes are cut through the liner, and resin is impregnated into the region about each hole and hardened to form an integral grommet or reinforcement. A mold for impregnating the region about the hole includes a lower mold body with a projecting spigot and a groove thereabout. An upper mold body has a central opening with a groove thereabout, the upper mold body fitting over the spigot. A tube fits into the central opening and receives a resin, which is then forced by a plunger down the tube and allowed to harden and form a secure and reinforced hole for attaching a pull-in or hold-back rope or cable.

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Germantown, TN, United States of America

Edward Peter Smith