Variable pressure screening
US6348130B1 · kind B1 · utility
2Cited by
14References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 8, 2000 |
| Grant date | Feb 19, 2002 |
| Priority date | — |
| Expiry date | Sep 8, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB07B2230/01
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Pressure type screening apparatus for screening papermakers' stock and method of use is disclosed. Screen (20) has an inlet screening surface (23) and an outlet surface (unlabled). Pressure transducers (not shown) vary the fluid pressure on the inlet surface of the screen (23) from a maximum to a minimum, and also vary the fluid pressure on the outlet surface of the screen (20) from a minimum to a maximum at a repetitive cyclic rate. The amplitude of such pressures is such that flow reversal occurs through the screen (20) and any fiber mat that tends to form on the inlet surface (23) is disrupted or fluidized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.