Method and an apparatus for lining a pipe or duct
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Mar 7, 2000
Grant Date -
N/A
app pub date -
Sep 11, 1998
filing date -
Sep 11, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a method and an apparatus for lining a pipe through a sealing internal lining by using a flexible tube including adhesive, which is introduced into said pipe in turning inside out manner and is kept dimensionally stable until the adhesive is cured. To reduce the frictional force during the introducing operation a strip additive is deposited onto the outside of the flexible tube prior to the turning up operation. A strip additive having a gel-like consistence is used to minimize the frictional force. For a uniformly wetting the flexible tube with the strip additive, this is transferred into a liquid condition by heating prior to depositing. After depositing, it quickly cools down to the ambient temperature such that the required gel-like consistence is ensured for the introducing operation. Thereby it is possible to line pipes or ducts comprising several pipe bends an angles within the line course.
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