Felt material of layer of fine denier felt and layer of coarse denier felt
US4390574A · kind A · utility
48Cited by
1References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 31, 1981 |
| Grant date | Jun 28, 1983 |
| Priority date | — |
| Expiry date | Jul 31, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/57
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to the provision of a filling material such as an inorganic filler in the felt, especially a needled felt. The resulting felt material is formed into a tube for use in a passageway lining process in which the felt material is soaked in a curable resin. The purpose of the filling material is to reduce the quantity of resin required to impregnate the felt, thereby to reduce the cost of the process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.