Screening apparatus with light reject removal
US4634521A · kind A · utility
13Cited by
5References
5Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Apr 30, 1985 |
| Grant date | Jan 6, 1987 |
| Priority date | — |
| Expiry date | Apr 30, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D29/908
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A screen for fibre pulp is provided with means for removal of light reject. The screening apparatus comprises a vertical cylindrical screen (2); and a rotor (3) which is concentrically disposed inside the screen and the substantially closed outer surface (9) of which together with the inner surface (10) of the screen defines a screening zone (11) for the pulp. A pipe (19) is provided inside the rotor (3) the upper end of the pipe being disposed adjacent to the inner surface (21) of the closed upper end (12) of the rotor (3).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.