Methods and apparatus for producing nonwoven fibrous webs
US9422653B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2012 |
| Grant date | Aug 23, 2016 |
| Priority date | — |
| Expiry date | May 24, 2033 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD04H1/736
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Methods and apparatus including a chamber having a substantially open lower end positioned above a collector surface, at least one fiber inlet positioned above the lower end, a first multiplicity of rollers positioned within the chamber wherein each roller has a multiplicity of projections extending outwardly from a circumferential surface surrounding a center axis of rotation, a second multiplicity of rollers positioned within the chamber above the first multiplicity of rollers wherein each of the second multiplicity of rollers has a multiplicity of projections extending outwardly from a circumferential surface surrounding a center axis of rotation, the second multiplicity of rollers positioned so at least a portion of the projections extending outwardly from the circumferential surfaces of each of the second multiplicity of rollers vertically overlaps with at least a portion of the projections extending outwardly from the circumferential surface of at least one of the first multiplicity of rollers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.