Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1975-10-10
1977-09-20
Whitby, Edward G.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
61 722, 138 99, 156 79, 156304, 264 36, 264 465, 264 466, 264 469, 285 15, 285294, B32B 3500
Patent
active
040494802
ABSTRACT:
Disclosed is a method and apparatus for forming a joint in a confined space between two abutting ends of conduit liners. In the method, an excavation is formed to provide access to a buried conduit. Thereafter, the conduit is opened and cleaned of debris and elongated sections of conduit liner are inserted through the opening into the conduit in opposite directions from the opening. Once insertion is completed, a sleeve is positioned concentrically around one of the conduit section ends. The ends of the sections are positioned in an abutting coaxial relationship and are aligned and attached together by tape. The sleeve is then moved to a position overlapping the intersection of the two sections and the annular space between the sleeve and the exterior of the conduit sections is closed by sealing with foam rubber stripping constrained by tape. A polyurethane material is injected through a port in the sleeve to fill the annular space. Thereafter, the polyurethane material is allowed to set.
REFERENCES:
patent: 2857931 (1958-10-01), Lawton
patent: 2930634 (1960-03-01), Merritt
patent: 3163181 (1964-12-01), Xenis et al.
patent: 3258512 (1966-06-01), Flowers et al.
patent: 3616516 (1971-11-01), Corriston
patent: 3826521 (1974-07-01), Wilhelmsen
patent: 3950461 (1976-04-01), Levens
Nipak, Inc.
Whitby Edward G.
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