Ultrasonically bonded non-woven fabric
US4659614A · kind A · utility
37Cited by
7References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 18, 1985 |
| Grant date | Apr 21, 1987 |
| Priority date | — |
| Expiry date | Jul 18, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/659
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Ultrasonically bonded non-woven fabric which simulates either needle punched felt or ribcord felt is disclosed. The fabric comprised a loose packed batt which is welded to itself and alternatively can have either one or more additional dense packed layers welded thereon. Methods and apparatus are disclosed for making the fabric.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.