Multi-stage forming drum commutator
US6630096B2 · kind B2 · utility
34Cited by
11References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 4, 2001 |
| Grant date | Oct 7, 2003 |
| Priority date | — |
| Expiry date | Apr 2, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F13/15617
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method and apparatus (20) for forming a fibrous web (50) includes a movable, foraminous forming surface (22) and a substantially stationary, vacuum-commutator duct system (24) which is located substantially subjacent the forming surface (22). The vacuum-commutator duct system (24) has an entrance opening (26) that changes in configuration along a longitudinal dimension (30) of the entrance opening (26).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.