Method for producing tubular products from nonwoven fibers
US5366576A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 14, 1993 |
| Grant date | Nov 22, 1994 |
| Priority date | — |
| Expiry date | Apr 14, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/108
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A system and method are provided for producing segmented tubular products such as filters from nonwoven fibers. The system includes a die assembly, a collector assembly including a rotating mandrel, a withdrawer assembly, and a post-treatment assembly. The withdrawer assembly utilizes at least one threaded roller contacting either the inner or outer periphery of a tube formed on the mandrel to withdraw the tube from the mandrel in a controlled manner. The post-treatment assembly smoothes the outer surface of the tube prior to cutting by melting loose fiber strand strands extending therefrom. The properties of the finished product can be varied by altering the operation of the collector assembly and/or the withdrawer assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.