Pulp screen or the like
Abstract
Abstract A pulp screen plate is provided with screening holes of circular cross section extending obliquely therethrough so that elliptical hole openings are presented to the fluid material being screened. This construction encourages individual fibers longer than the diameters of the screening holes to enter and pass through those holes without increasing significantly the passage of unwanted lumps or flakelike particles therethrough. In applications employing hydrofoil impellers or the like, the holes are disposed in relatively tangential relation to the direction of movement of the adjacent strata of the fluid material being processed, thereby minimizing velocity losses to increase the capacity and efficiency of the screening machine.
Inventors
- 👤 Salomon M Salomon
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |