Method for lining a tubular conduit

Details Method for lining a tubular conduit Method for lining a tubular conduit

1997-06-05

2000-02-15

Maki, Steven D.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Producing multilayer work or article

138 97, 138 98, 156287, 156294, 264269, B29C 6334

Patent

active

060249102

ABSTRACT:
A method for lining an underground sewer pipe: (a) preparing a tubular liner made of a tubular fabric layer soaked with a thermosetting liquid resin and two layers of airtight film with which inner and outer walls of the fabric layer are covered; (b) inserting the liner assembly into the tubular conduit from the front end by pulling the front end with a rope; (c) inflating the tubular liner assembly after closing the front and the rear ends thereof; (d) heating the thermosetting resin to thereby harden the fabric layer of the liner assembly; and (e) removing those portions of the tubular liner assembly which do not partake in lining the tubular conduit.

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patent: 5334429 (1994-08-01), Imoto et al.
patent: 5490964 (1996-02-01), Kamiyama et al.

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