Abstract: A pipe liner for insertion into a pipe to be relined which includes an elastomeric tube encompassed by a lattice of fibre material which radially contracts upon elongation and which is impregnated with a resin that is partially polymerized when the lattice is in its elongated and radially contracted condition to maintain the combination in that condition until has been inserted into a pipe at which the time the liner is softened upon additional polymerization to permit expansion of the liner into contact with the damaged pipe to be lined.

Abstract: A method for in situ rehabilitation of deteriorated underground piping featuring ease of installation.

Abstract: The disclosure relates to a reinforced plastic rivet comprising a plurality of substantially continuous carbon fibres encapsulated in a partially polymerized thermoset resin matrix and enveloped in a high tensile strength low modulus tubular sheath. A portion of the rivet is deformable to form a head and fully polymerizable upon heating thereof.

Abstract: This disclosure relates to a new self-locking threaded fastener means having a patch on the threaded portion thereof to provide self-locking properties. The patch may be comprised of a thermoplastic polymer such as a thermoplastic epoxy adhesive system and is applied to the threaded fastener in an unpolymerized state and is allowed to polymerize in situ. Since an unpolymerized adhesive composition would be applied as a liquid, it would not be necessary to heat the fastener, thus saving valuable energy as well as eliminating the chance of destroying any corrosion resistant coating on the fastener such as phosphate and oil. This new fastener means also has good multiple usage characteristics in that it may be installed and removed several times without losing its self-locking properties.

Abstract: This disclosure relates to a new fastener means for use on bolts, screws, nuts, threaded surfaces and the like which includes an adhesive composition comprised of a solid particulate adhesive, such as a low molecular weight crystalline adhesive or a high molecular weight non-crystalline solid thermoset resin, and a curing agent. The adhesive composition also includes a film forming carrier such as latex in which said solid particulate adhesive is dispersed and which does not dissolve nor react with said adhesive, and a microencapsulated solvent dispersed in said film forming carrier which acts upon the solid particulate adhesive to effect a cure. The adhesive composition may be applied over oily surfaces such as phosphate and oil coated bolts, without destroying the corrosion resistant phosphate and oil coating, and still provides excellent fastening properties.