Plastic article or earthenware shaping or treating: apparatus – Utilizing subterranean feature as shaping means
Patent
1993-01-22
1993-12-28
Wood, Jay H.
Plastic article or earthenware shaping or treating: apparatus
Utilizing subterranean feature as shaping means
425384, 425460, 264260, 2642356, 264322, B29C 6334
Patent
active
052734145
ABSTRACT:
A process for installing a liner in a generally horizontal pipe section includes the steps of: providing a hollow generally cylindrical folded pipe liner having a reduced cross section sized to allow the liner to be slidably drawn into the pipe section from an upstream end to a downstream end; pulling the folded liner through the pipe section leaving end sections of the liner extending from the upstream end and the downstream end of the pipe; snaking a pull wire through the liner; pulling an air hose and a steam hose through the folded liner from the downstream end to the upstream end; providing a floating plug assembly including at least two disk shaped expanders; attaching the steam hose to the floating plug assembly downstream of the disk shaped expanders; attaching the air hose to the floating plug assembly upstream of the disk shaped expanders; inserting the floating plug assembly into the liner at the upstream end; and providing steam to the steam hose and cooling air to the air hose, while pulling the floating plug assembly through the liner to progressively heat the liner to a softening point downstream of the disk shaped expanders, and expand the liner to fill the pipe and cool the expanding liner upstream of the disk shaped expanders.
REFERENCES:
patent: 2695255 (1954-11-01), Avery
patent: 3159895 (1964-12-01), Perovich
patent: 3322559 (1967-05-01), Eskijian
patent: 3563889 (1971-02-01), Cooper IV et al.
patent: 3662045 (1972-05-01), Tierling
patent: 3966389 (1976-06-01), Shubert
patent: 4088724 (1978-05-01), Kuhnert
patent: 4708841 (1987-11-01), Larsen
patent: 4741795 (1988-05-01), Grace et al.
patent: 4950356 (1990-08-01), Grace
patent: 4950446 (1990-08-01), Kinumoto et al.
patent: 4985196 (1991-01-01), LeDoux et al.
American Pipe & Plastics, Inc.
Smith Duane S.
Wood Jay H.
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