Formation in a two fabric paper machine
US5735330A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 1996 |
| Grant date | Apr 7, 1998 |
| Priority date | — |
| Expiry date | Jun 11, 2016 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21F9/003
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A forming section for a two-fabric paper machine using at least one formation blade having a shallow cavity in its top surface. The cavity is placed and dimensioned to withdraw fluid continuously from the stock, and to propel it back through the fabric and the incipient paper web into the stock so as to cause a controlled level of localized turbulence which serves to improve formation without causing excessive drainage or fines loss. The formation blade shape, in conjunction with the forming fabric tension, is configured to provide a hydraulic seal between the fabric and the stock, so that all of the withdrawn fluid is returned to the stock.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.