US3035967A
Expired / Lapsed
US
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Process and apparatus for regulating consistency and mineral filler content of papermaking stock
Assignee: West Virginia Pulp and Paper Co
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Filing: 1960-06-09
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Granted: 1962-05-22
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Expires: 1980-06-09
Abstract
No abstract record available.
Inventors
- 👤 Peter K Sacksen
- 👤 Gene M Correll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:28
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
THE METHOD OF CONTINUOUSLY CORRECTIVELY ADJUSTING THE FIBER CONSISTENCY OF A PULP FURNISH AND THE MINERAL FILLER CONTENT THEREOF TO PRESCRIBED VALUES WHICH COMPRISES TRANSMITTING A FURNISH STREAM WHICH IS INITIALLY OF TOO HIGH CONSISTENCY AND TOO LOW MINERAL FILLER CONTENT, FIRST THROUGH A WATER AND FILLER SLURRY ADDITION ZONE AND THEN THROUGH A MEASURING ZONE, IN THE MEASURING ZONE CONTINUALLY MEASURING THE APPARENT VISCOSITY OF THE STREAM AND CONTROLLING THEREBY THE ADDITION OF WATER TO THE STREAM IN THE ADDITION ZONE FOR LOWERING THE FIBER CONSISTENCY, AND IN THE MEASURING ZONE CONTINUALLY MEASURING THE SPECIFIC GRAVITY OF THE STREAM AND CONTROLLING THEREBY THE ADDITION OF A MINERAL FILLER SLURRY TO THE STREAM IN THE ADDITION ZONE FOR RAISING THE MINERAL FILLER CONTENT, THE PROCEDURE BEING SUCH THAT THE ADDED WATER AND THE ADDED FILLER SLURRY CONTINUALLY AFFECT BOTH MEASUREMENTS AND THEREBY ENTER INTO THE CONTROL OF BOTH ADDITIONS.
Claim 2
Independent Claim
149 words
THE METHOD OF CONTINUOUSLY CORRECTIVELY ADJUSTING THE FIBER CONSISTENCY OF A PULP FURNISH AND THE MINERAL FILLER CONTENT THEREOF TO PRESCRIBED VALUES WHICH COMPRISES TRANSMITTING A FURNISH STREAM WHICH IS INITIALLY OF TOO HIGH CONSISTENCY AND TOO LOW MINERAL FILLER CONTENT, FIRST THROUGH A WATER AND FILLER SLURRY ADDITION ZONE AND THEN THROUGH A MEASURING ZONE, IN THE MEASURING ZONE CONTINUALLY MEASURING THE APPARENT VISCOSITY OF THE STREAM AND CONTROLLING THEREBY THE ADDITION OF WATER TO THE STREAM IN THE ADDITION ZONE FOR LOWERING THE FIBER CONSISTENCY, AND IN THE MEASURING ZONE CONTINUALLY MEASURING THE SPECIFIC GRAVITY OF THE STREAM AND CONTROLLING THEREBY THE ADDITION OF A MINERAL FILLER SLURRY TO THE STREAM IN THE ADDITION ZONE FOR RAISING THE MINERAL FILLER CONTENT, THE PROCEDURE BEING SUCH THAT THE ADDED WATER AND THE ADDED FILLER SLURRY CONTINUALLY AFFECT BOTH MEASUREMENTS AND THEREBY ENTER INTO THE CONTROL OF BOTH ADDITIONS.
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) | 1965-05-21 | 1965-11-20 | 1966-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-21 | 1969-11-20 | 1970-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-21 | 1973-11-20 | 1974-05-22 | $7700.00 | Window Closed / Lapsed |