Patent US3587257A successfully refreshed from Google Patents.
US3587257A
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US
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Bleaching system including a single,triple-deck table washer
Assignee: Stadler Hurter International Ltd
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Filing: 1968-10-09
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Granted: 1971-06-28
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Expires: 1988-10-09
Abstract
Abstract APPARATUS USED IN THE BLEACHING OF PULP. PULP IS CONVEYED FROM A CHLORINATION TOWER TO A FIRST DECK OF A THREE DECK TABLE WASHER. THE WASHED PULP IS THEN CONVEYED TO A CAUSTIC TREATMENT TOWARD AND AFTER TREATMENT THEREIN CONVEYED TO A SECOND DECK OF THE THREE DECK TABLE WASHER. AFTER THIS SECOND WASH, THE PULP IS TREATED IN A HYPOCHLORITE TOWER AND THEREAFTER WASHED ON A THIRD DECK OF THE TABLE WASHER. EACH DECK OF THE TABLE WASHER HAS A CIRCULAR, ROTATABLE, HORIZONTAL SCREEN THEREON AND A VACUUM ACTS TO DRAW THE EFFLUENT WASH WATER THROUGH THE SCREEN. THE TABLE WASHER CAN WASH PULP AT A CONSISTENCY BETWEEN 1 1/2 AND 5 PERCENT.
Inventors
- 👤 Alfred Max Hurter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:25
CPC Classifications
D; D21; D21C; D21C9/00; D21C9/10; D21C9/1026
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |