Method and apparatus for treating filler-containing material, such as recycled fibers
USRE38317E1 · kind E1 · reissue
1Cited by
7References
36Claims
0Family size
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Key dates
| Filing date | Jun 6, 2000 |
| Grant date | Nov 18, 2003 |
| Priority date | — |
| Expiry date | Jun 6, 2020 |
Classification
- Technology area (CPC —)General
Abstract
Recycled fiber pulp from a vortex cleaning plant (e.g. connected to the short circulation of a paper machine) effects the recovery and return of fillers in the recycled fiber pulp discharged from the vortex cleaning plant, in an efficient and economical manner. The loss of filler in the recycled fiber pulp discharged from the vortex cleaning plant is decreased by treating a concentrated fraction of the rejects from the vortex cleaning plant with a mixer/disperser for dispersing the filler in the recycled fiber pulp, and returning as much usable filler as possible back to the process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.