US2745274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for discharging pulp from bleaching towers
Assignee: Improved Machinery Inc
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Filing: 1952-10-22
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Granted: 1956-05-15
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Expires: 1972-10-22
Abstract
No abstract record available.
Inventors
- 👤 John P Rich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:22
CPC Classifications
D; D21; D21C; D21C9/00; D21C9/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
MEANS FOR BLEACHING WOOD PULP COMPRISING A REACTION TOWER HAVING ITS AXIS VERTICAL; MEANS AT THE TOP OF THE TOWER FOR CONTINUOUSLY DELIVERING INTO THE TOWER A HIGH DENSITY MIXTURE OF PULP AND A BLEACHING AGENT; SAID TOWER HAVING AN OUTLET ADJACENT ITS BOTTOM; A PLURALITY OF INWARDLY DIRECTED, PERIPHERALLY SPACED NOZZLES ADJACENT THE BOTTOM OF SAID TOWER BUT SPACED VERTICALLY ABOVE SAID OUTLET; A SUBSTANTIALLY CONSTANT SPEED CENTRIFUGAL PUMP FOR DELIVERING DILUTION WATER TO SAID NOZZLES; MEANS CONNECTING SAID PUMP TO EACH OF SAID NOZZLES; EACH OF SAID NOZZLES HAVING AN OUTLET OPENING AND A MEMBER MOVABLE WITHIN EACH OF THE NOZZLES TO ADJUST THE AREA OF SAID OPENINGS; EACH OF SAID MEMBERS HAVING A FLUID PRESSURE RESPONSIVE DEVICE CONNECTED THERETO FOR MOVING THE SAME; A SOURCE OF FLUID PRESSURE UNDEPENDENT OF SAID PUMP, AND CONTROL MEANS FOR APPLYING SAID FLUID PRESSURE EQUALLY TO ALL OF SAID DEVICES.
Claim 2
Dependent Claim
149 words
MEANS FOR BLEACHING WOOD PULP COMPRISING A REACTION TOWER HAVING ITS AXIS VERTICAL; MEANS AT THE TOP OF THE TOWER FOR CONTINUOUSLY DELIVERING INTO THE TOWER A HIGH DENSITY MIXTURE OF PULP AND A BLEACHING AGENT; SAID TOWER HAVING AN OUTLET ADJACENT ITS BOTTOM; A PLURALITY OF INWARDLY DIRECTED, PERIPHERALLY SPACED NOZZLES ADJACENT THE BOTTOM OF SAID TOWER BUT SPACED VERTICALLY ABOVE SAID OUTLET; A SUBSTANTIALLY CONSTANT SPEED CENTRIFUGAL PUMP FOR DELIVERING DILUTION WATER TO SAID NOZZLES; MEANS CONNECTING SAID PUMP TO EACH OF SAID NOZZLES; EACH OF SAID NOZZLES HAVING AN OUTLET OPENING AND A MEMBER MOVABLE WITHIN EACH OF THE NOZZLES TO ADJUST THE AREA OF SAID OPENINGS; EACH OF SAID MEMBERS HAVING A FLUID PRESSURE RESPONSIVE DEVICE CONNECTED THERETO FOR MOVING THE SAME; A SOURCE OF FLUID PRESSURE UNDEPENDENT OF SAID PUMP, AND CONTROL MEANS FOR APPLYING SAID FLUID PRESSURE EQUALLY TO ALL OF SAID DEVICES.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-15 | 1959-11-14 | 1960-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-15 | 1963-11-14 | 1964-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-15 | 1967-11-14 | 1968-05-15 | $7700.00 | Window Closed / Lapsed |