Process and device for dewatering a fiber web
US7686922B2 · kind B2 · utility
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2References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 4, 2007 |
| Grant date | Mar 30, 2010 |
| Priority date | — |
| Expiry date | Apr 6, 2028 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21F1/523
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A process and a device for dewatering a fiber web 3, especially a paper web, using vacuum. The vacuum seen by a given unit are of the web is pulsed between a maximum value V and a minimum value. At least one suction box 7 is provided with perforations beneath the running web where the vacuum is applied with a pulsating effect on the web.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.