Lining material for pipelines and method for manufacturing the same
US5885674A · kind A · utility
42Cited by
1References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 3, 1997 |
| Grant date | Mar 23, 1999 |
| Priority date | — |
| Expiry date | Jul 3, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24041
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In the tubular lining material composed by rolling tubularly a sheet-like unwoven fabric, stitching mutually both side edges thereof to obtain a tubular unwoven fabric having a stitched part and forming a continuous synthetic resin tubular coating layer on the surface of this tubular unwoven fabric, as the coating layer is thicker than other parts, the elongation of the stitched part is prevented and pinholes would not occur in the stitched part when the pipeline is repaired.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.