Method of lining a pipe
AssigneeInsituform (Pipes & Structures) Ltd.
InventorEric Wood
Life of this patent
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Abstract
A method of lining a passageway with a hard, rigid pipe of thermosetting resin, wherein a tubular fibrous felt is immersed in the resin to form a carrier for the resin. The immersed felt and resin have an inflatable tube therein and this tube is inflated to shape the resin to the passageway surface. The resin is cured to form the hard, rigid lining pipe with the felt embedded therein.
Claims19
A method of lining a surface at least partially defining a passageway wherein a laminate of non woven felt sandwiched between an outer membrane and an inner membrane of plastics sheet material is urged by fluid pressure so that said outer membrane lies against said surface, said method including the additional steps of totally impregnating the felt with an uncured thermosetting resin so as to completely immerse the felt in the resin, and curing the resin while the laminate is held against such surface so as to form a hard, cured and selfsupporting resin lining having embedded felt reinforcement.
Dependencies are inferred from the claim text.