US3305180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of pulping and defibering paper stock and apparatus therefor
Assignee: Noble and Wood Machine Co
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Filing: 1964-01-28
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Granted: 1967-02-21
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Expires: 1984-01-28
Abstract
No abstract record available.
Inventors
- 👤 Tomlinson William Clyde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:06
CPC Classifications
D; D21; D21B; D21B1/00; D21B1/04; D21B1/12; D21B1/30; D21B1/34; D21B1/345
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
144 words
COMBINED PULPING AND DEFIBERING APPARATUS COMPRISING, A PULPING TANK HAVING A BOTTOM WALL, SUBSTANTIALLY VERTICAL WALLS FORMING A CENTRAL ANNULAR OPENING IN SAID TANK BOTTOM, A ROTOR MOUNTED FOR ROTATION IN SAID ANNULAR OPENING, PULPING BLADE MEANS ON SAID ROTOR FOR DIRECTING STOCK IN SAID TANK IN AN UPWARD VORTICAL PATH, EJECTOR BLADE MEANS ON SAID ROTOR FOR EJECTING STOCK FROM SAID ROTOR IN A TANGENTIAL-RADIAL PATH, THE PERIPHERY OF SAID ROTOR AND THE SAID VERTICAL WALL OF SAID ANNULAR OPENING DEFINING BETWEEN THEM AN ANNULAR OUTLET ORIFICE OPENING DIRECTLY INTO SAID TANK AT A POINT WHERE SAID TANGENTIALLY-RADIALLY EJECTED STOCK LEAVES THE PERIPHERY OF SAID ROTOR, AND COOPERATING MEANS MOUNTED RESPECTIVELY ON SAID ROTOR AND SAID WALL IN SAID ANNULAR ORIFICE FOR DEFIBERING SAID STOCK, SAID LATTER MEANS BEING RESPECTIVELY SPACED TO REDUCE THE SIZE ONLY OF OVERSIZED PARTICLES IN SAID ANNULAR ORIFICE.
Claim 2
Dependent Claim
144 words
COMBINED PULPING AND DEFIBERING APPARATUS COMPRISING, A PULPING TANK HAVING A BOTTOM WALL, SUBSTANTIALLY VERTICAL WALLS FORMING A CENTRAL ANNULAR OPENING IN SAID TANK BOTTOM, A ROTOR MOUNTED FOR ROTATION IN SAID ANNULAR OPENING, PULPING BLADE MEANS ON SAID ROTOR FOR DIRECTING STOCK IN SAID TANK IN AN UPWARD VORTICAL PATH, EJECTOR BLADE MEANS ON SAID ROTOR FOR EJECTING STOCK FROM SAID ROTOR IN A TANGENTIAL-RADIAL PATH, THE PERIPHERY OF SAID ROTOR AND THE SAID VERTICAL WALL OF SAID ANNULAR OPENING DEFINING BETWEEN THEM AN ANNULAR OUTLET ORIFICE OPENING DIRECTLY INTO SAID TANK AT A POINT WHERE SAID TANGENTIALLY-RADIALLY EJECTED STOCK LEAVES THE PERIPHERY OF SAID ROTOR, AND COOPERATING MEANS MOUNTED RESPECTIVELY ON SAID ROTOR AND SAID WALL IN SAID ANNULAR ORIFICE FOR DEFIBERING SAID STOCK, SAID LATTER MEANS BEING RESPECTIVELY SPACED TO REDUCE THE SIZE ONLY OF OVERSIZED PARTICLES IN SAID ANNULAR ORIFICE.
Claim 3
Dependent Claim
125 words
THE PROCESS OF PULPING AND DEFIBERING PAPER STOCK COMPRISING, FORMING AN AQUEOUS SUSPENSION OF UNPULPED PAPER STOCK, SUBJECTING SAID STOCK IN A TANK TO A ROTOR ACTION IN WHICH SAID STOCK IS URGED IN A TANGENTIAL-RADIAL PATH FROM A ROTOR ACROSS AN ANNULAR OUTLET ORIFICE, WITHDRAWING PART OF SAID STOCK THROUGH SAID ANNULAR OUTLET ORIFICE, REFINING SAID STOCK IN SAID ANNULAR OUTLET ORIFICE BY THE ACTION OF REFINING MEANS SPACED SUFFICIENTLY CLOSE TO REFINE OVER-SIZE PARTICLES BUT SUFFICIENTLY APART TO AVOID SUBSTANTIAL REFINEMENT OF PARTICLES OF THE CORRECT SIZE, RECIRCULATING SAID WITHDRAWN STOCK INTO THE TOP OF SAID TANK, AND DIRECTING SAID RE-CIRCULATED STOCK DOWNWARDLY AGAINST THE STOCK IN SAID TANK TO DRIVE STOCK AT THE TOP THEREOF DOWNWARDLY IN SAID TANK TOWARD SAID ROTOR.
Claim 4
Dependent Claim
125 words
THE PROCESS OF PULPING AND DEFIBERING PAPER STOCK COMPRISING, FORMING AN AQUEOUS SUSPENSION OF UNPULPED PAPER STOCK, SUBJECTING SAID STOCK IN A TANK TO A ROTOR ACTION IN WHICH SAID STOCK IS URGED IN A TANGENTIAL-RADIAL PATH FROM A ROTOR ACROSS AN ANNULAR OUTLET ORIFICE, WITHDRAWING PART OF SAID STOCK THROUGH SAID ANNULAR OUTLET ORIFICE, REFINING SAID STOCK IN SAID ANNULAR OUTLET ORIFICE BY THE ACTION OF REFINING MEANS SPACED SUFFICIENTLY CLOSE TO REFINE OVER-SIZE PARTICLES BUT SUFFICIENTLY APART TO AVOID SUBSTANTIAL REFINEMENT OF PARTICLES OF THE CORRECT SIZE, RECIRCULATING SAID WITHDRAWN STOCK INTO THE TOP OF SAID TANK, AND DIRECTING SAID RE-CIRCULATED STOCK DOWNWARDLY AGAINST THE STOCK IN SAID TANK TO DRIVE STOCK AT THE TOP THEREOF DOWNWARDLY IN SAID TANK TOWARD SAID ROTOR.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |