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US 10,539,263 B2Granted
Cured-in-place pipe liner
OwnerTomas Forsmaninventor
Life of this patent
Estimating the term…
Abstract
A CIPP liner for repairing a sewer pipe comprises a cover fabric (1) and a base fabric (2) to be attached to each other using needle punch technology, as well as a stretchable plastic membrane (4) attached to the base fabric (2) with a flexible glue (3), into which flexible glue (3) also the with each other mixed fibres (5) of the cover fabric (1) and the base fabric (2) are glued. From this material, a CIPP liner corresponding to the dimensions of the sewer pipe is cut and sewn, the sewing seam of which is further taped.
Claims4
A method for producing a CIPP liner, comprising the steps of:
- stretching a base fabric (2) in one or more directions;
- arranging an evenly spread cover fabric (1) against the base fabric (2) stretched in one or more directions;
- pressing needle punch needles (7) from the side of the cover fabric (1) through the cover fabric (1) and the base fabric (2), thereby mixing the fibres of the fabrics (1) and (2) with each other and the mixed fibres (5) extend to the outside of the surface of the base fabric (2);
- removing the needle punch needles (7);
- attaching the base fabric (2) and a plastic membrane (4) to each other with a flexible glue (3), wherein, at the same time, the mixed fibres (5) are attached by the glue (3) to each other thereby producing the cover fabric (1) arranged in both longitudinal and transverse directions in waves and/or pleats attached to the base fabric (2);
- and
- cutting and sewing a piece of the requisite size of the CIPP liner from the created CIPP liner fabric, and taping the sewing seams once the glue (3) has dried.
4 more elements
Dependencies are inferred from the claim text.