Process and device for lining tunnels and ducts having circular and non-circular cross-sections, especially for canal and tunnel construction
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United States of America Patent
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Dec 15, 1992
Grant Date -
N/A
app pub date -
Jan 22, 1992
filing date -
Feb 8, 1991
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a process and a winding device for lining elongated spaces such as tunnels or ducts of circular and non-circular cross-sections, especially for canal and tunnel construction band is employed. Tubes with various diameters and different cross-sections, but mainly with circular and egg-shaped cross-sections, may be created from the band by the winding device.
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