Patent US3241676A successfully refreshed from Google Patents.
US3241676A
Expired / Lapsed
US
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Dewatering method and apparatus
Assignee: Kimberly Clark Corp
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Filing: 1962-08-09
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Granted: 1966-03-22
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Expires: 1982-08-09
Abstract
No abstract record available.
Inventors
- 👤 Stewart M Neuville
- 👤 Caple Ira
- 👤 Robert W Ellis
- 👤 Henry R Cloots
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:21
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/22; B01D33/00; B01D33/06; B01D33/073; D; D21; D21F; D21F1/00; D21F1/66
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
209 words
IN A METHOD FOR CONTINUOUSLY THICKENING A DILUTE SUSPENSION FO FIBROUS PULP IN WATER BY FLOWING A CONTINUOUS STREAM OF SAID SUSPENSION UNDER PRESSURE AGAINST THE FLUID PERMEABLE SURFACE OF A ROTATING SCREEN WHILE SAID STREAM IS CONFINED IN AN ANNULAR SPACED SURROUNDING SAID SCREEN WHEREBY A PRESSURE DROP BETWEEN THE EXTERIOR AND INTERIOR OF SAID SCREEN CAUSES A PORTION OF THE DILUTION WATER TO PASS THROUGH SAID SCREEN TO LEAVE A THICKENED SUSPENSION OF FIBERS IN SAID ANNULAR SPACE FROM WHERE THE THICKENED SUSPENSION IS SUBSEQUENTLY DISCHARGED; THE IMPROVEMENT WHICH COMPRISES; (A) DIRECTING A LARGE VOLUME TURBULENT FLOW OF THE DILUTE LIQUID SUSPENSION OF PULP UNDER PRESSURE AGAINST THE SURFACE OF THE ROTATING SCREEN IN A DIRECTION SUBSTANTIALLY RADIAL TO SAID SCREEN, CAUSING SAID STREAM TO DIVIDE INTO TWO PORTIONS FLOWING IN ARCUATE PATHS AROUND SAID SCREEN, WTIH ONE PORTION FLOWING IN THE DIRECTION OF ROTATION OF SAID SCREEN AND THE SECOND PORTION FLOWING COUNTER TO SAID DIRECTION OF RATATION; (B) ROTATING SAID SCREEN AT A SPEED SUFFICIENT TO MAINTAIN A HIGH DEGREE OF TURBULENCE IN SAID FLOW TO MINIMIZE FIBER BUILD-UP ON SAID SCREEN; AND (C) SUBSEQUENTLY REDUCTING ABRUPTLY THE TOTAL CROSSSECTIONAL FLOW IN EACH OF SAID DIVIDED PORTIONS BY SHARPLY CONSTRICTING EACH OF SAID CROSS-SECTIONAL AREAS
Claim 2
Dependent Claim
209 words
IN A METHOD FOR CONTINUOUSLY THICKENING A DILUTE SUSPENSION FO FIBROUS PULP IN WATER BY FLOWING A CONTINUOUS STREAM OF SAID SUSPENSION UNDER PRESSURE AGAINST THE FLUID PERMEABLE SURFACE OF A ROTATING SCREEN WHILE SAID STREAM IS CONFINED IN AN ANNULAR SPACED SURROUNDING SAID SCREEN WHEREBY A PRESSURE DROP BETWEEN THE EXTERIOR AND INTERIOR OF SAID SCREEN CAUSES A PORTION OF THE DILUTION WATER TO PASS THROUGH SAID SCREEN TO LEAVE A THICKENED SUSPENSION OF FIBERS IN SAID ANNULAR SPACE FROM WHERE THE THICKENED SUSPENSION IS SUBSEQUENTLY DISCHARGED; THE IMPROVEMENT WHICH COMPRISES; (A) DIRECTING A LARGE VOLUME TURBULENT FLOW OF THE DILUTE LIQUID SUSPENSION OF PULP UNDER PRESSURE AGAINST THE SURFACE OF THE ROTATING SCREEN IN A DIRECTION SUBSTANTIALLY RADIAL TO SAID SCREEN, CAUSING SAID STREAM TO DIVIDE INTO TWO PORTIONS FLOWING IN ARCUATE PATHS AROUND SAID SCREEN, WTIH ONE PORTION FLOWING IN THE DIRECTION OF ROTATION OF SAID SCREEN AND THE SECOND PORTION FLOWING COUNTER TO SAID DIRECTION OF RATATION; (B) ROTATING SAID SCREEN AT A SPEED SUFFICIENT TO MAINTAIN A HIGH DEGREE OF TURBULENCE IN SAID FLOW TO MINIMIZE FIBER BUILD-UP ON SAID SCREEN; AND (C) SUBSEQUENTLY REDUCTING ABRUPTLY THE TOTAL CROSSSECTIONAL FLOW IN EACH OF SAID DIVIDED PORTIONS BY SHARPLY CONSTRICTING EACH OF SAID CROSS-SECTIONAL AREAS
References Cited (Backward Citations)
US1869797A
Cited
US2328220A
Cited
US2442234A
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US2538575A
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US2670849A
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US3019903A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |