Apparatus for the thickening of fiber suspensions
US6767432B1 · kind B1 · utility
5Cited by
7References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 21, 2001 |
| Grant date | Jul 27, 2004 |
| Priority date | — |
| Expiry date | Mar 21, 2021 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21F1/66
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to the thickening of pulp suspensions. A low consistency pulp suspension is fed to a pre-thickener (10) through an inlet conduit (18). A layer of thickened pulp, formed on a filter surface (22), is pushed along the filter surface by a cleaning member to the discharge end of the pre-thickener and is discharged through the outlet (20). The cleaning member comprises a rotating shaft (30) on which shaft at least one screw thread (32) is fixed so as to leave a free space between the shaft and the screw thread. Essentially non-thickened pulp is allowed to flow through the apparatus via this space.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.