Papermakers wet felt with ribbed and smooth surface textures
US4283454A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 8, 1980 |
| Grant date | Aug 11, 1981 |
| Priority date | — |
| Expiry date | Feb 8, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/3537
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A papermakers wet felt comprising a three layer fabric having a first or lower layer which defines a machine roll contacting surface, a second or intermediate layer, and a third or top layer which defines a paper-receiving surface. The lower layer is woven of machine direction yarns which are of much greater diameter than the cross machine direction yarns. The intermediate layer is also woven, and adds stability and strength to the felt while providing void areas for drainage. The top layer comprises a batt or fleece of non-woven batting material. Also disclosed is a method of making the papermakers felt wherein the lower and intermediate cloths are separately woven and then associated with each other so that the inner surface of the intermediate layer contacts the outer surface of the bottom layer. The associating of the two layers takes place on a conventional fiber locker or needling machine associated with a conventional stretching device. When both of the cloths have achieved substantially the same length, the non-woven web of synthetic fibers is needled into two cloths through the use of the needling machine to produce the composite three-layered papermakers felt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.