US3044925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for the manufacture of paper
Assignee: Library and Archives Canada
•
Filing: 1958-11-20
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Granted: 1962-07-17
•
Expires: 1978-11-20
Abstract
No abstract record available.
Inventors
- 👤 Martin J Berlyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:36
CPC Classifications
D; D21; D21F; D21F1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A METHOD OF FORMING A HIGH CONSISTENCY AQUEOUS SUSPENSION OF FIBRES IN THE ORDER OF FIVE PERCENT CONSISTENCY INTO A SHEET WHICH COMPRISES EFFECTING PRESSURE IMPREGNATION OF THE STOCK WITH A WATER-SOLUTION GAS, FORCING THE GAS-IMPREGNATED STOCK THROUGH A ORIFICE AT HIGH VELOCITY INTO AN EXPANSION ZONE IN WHICH DISSOLVED GAS COMES OUT OF SOLUTION IN THE FORM OF BUBBLES WHICH SERVE TO DEFLOCCULATE THE STOCK BY FORCING ADJACENT FIBRES APART AND WHICH ALSO BREAKS UP FLOCS AND CREATES TURBULENCE, DELIVERING THE DEFLOCCULATED STOCK FROM THE EXPANSION ZONE IN A DOWNWARDLY FLOWING STREAM, AND SUBJECTING THE DOWNWARDLY FLOWING DEFLOCCULATED STREAM OF STOCK TO COMPACTING PRESSURE APPLIED THERETO AT DIFFERENT POINTS ALONG THE LENGTH OF THE DOWNWARD PATH OF TRAVEL OF SAID STREAM TO THEREBY FORCE WATER AND GAS FROM THE DOWN-
Claim 2
Independent Claim
131 words
A METHOD OF FORMING A HIGH CONSISTENCY AQUEOUS SUSPENSION OF FIBRES IN THE ORDER OF FIVE PERCENT CONSISTENCY INTO A SHEET WHICH COMPRISES EFFECTING PRESSURE IMPREGNATION OF THE STOCK WITH A WATER-SOLUTION GAS, FORCING THE GAS-IMPREGNATED STOCK THROUGH A ORIFICE AT HIGH VELOCITY INTO AN EXPANSION ZONE IN WHICH DISSOLVED GAS COMES OUT OF SOLUTION IN THE FORM OF BUBBLES WHICH SERVE TO DEFLOCCULATE THE STOCK BY FORCING ADJACENT FIBRES APART AND WHICH ALSO BREAKS UP FLOCS AND CREATES TURBULENCE, DELIVERING THE DEFLOCCULATED STOCK FROM THE EXPANSION ZONE IN A DOWNWARDLY FLOWING STREAM, AND SUBJECTING THE DOWNWARDLY FLOWING DEFLOCCULATED STREAM OF STOCK TO COMPACTING PRESSURE APPLIED THERETO AT DIFFERENT POINTS ALONG THE LENGTH OF THE DOWNWARD PATH OF TRAVEL OF SAID STREAM TO THEREBY FORCE WATER AND GAS FROM THE DOWN-
References Cited (Backward Citations)
US1659688A
Cited
US1519696A
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GB356294A
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US1875075A
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GB748095A
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US2691796A
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US2969114A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-16 | 1966-01-15 | 1966-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-16 | 1970-01-15 | 1970-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-16 | 1974-01-15 | 1974-07-17 | $7700.00 | Window Closed / Lapsed |