US3617006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refiner control
Assignee: Consolidated Paper Bahamas Ltd
•
Filing: 1970-04-28
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Granted: 1971-11-02
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Expires: 1990-04-28
Abstract
Abstract A refining system wherein the consistency of the raw material fed and the energy applied to a refining zone defined by a pair of relatively rotating discs are regulated to ensure that steam generated between the discs develops a counterthrust tending to balance the pressure applied to the refining zone and wherein the steam pressure in the zone is sensed and the dilution water added controlled in accordance with this pressure sensed, thereby to maintain a balancing counterthrust between the discs, whereby effective disc separation may be maintained together with substantially uniform stock quality while avoiding plate clashing.
Inventors
- 👤 Howard W H Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:55
CPC Classifications
D; D21; D21D; D21D1/00; D21D1/20; D21D1/30
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
35 words
A method as defined in claim 1, wherein said amount of dilution water is controlled by sensing the pressure in said zone and controlling the amount of dilution water in accordance with the pressure sensed.
Claim 2
Dependent Claim
41 words
A method as defined in claim 2, further comprising comparing the pressure in said zone with said working pressure and controlling the amount of water added in accordance with the ratio of said working pressure to said pressure in said zone.
Claim 3
Dependent Claim
19 words
A method as defined in claim 3, wherein said consistency is in the range of 8 to 30 percent.
Claim 4
Dependent Claim
20 words
A method as defined in claim 3, wherein said energy is applied in the amount of at least 4 hp./in2.
Claim 5
Dependent Claim
33 words
A method as defined in claim 3, wherein said consistency is in the range of 8 to 30 percent and wherein said energy is applied in the amount of at least 4 hp./in2.
Claim 6
Dependent Claim
89 words
A refining apparatus comprising a pair of relatively rotatable refining discs, means for introducing fibers of raw material between said discs, means for applying a working pressure to at least one of said discs, means for rotating one of said discs, sensing means for sensing the pressure between said discs, means for introducing dilution water between said discs, control means for controlling the amount of dilution water added, said sensing means operating said control means to regulate the amount of dilution water added in accordance with the pressure sensed.
Claim 7
Dependent Claim
23 words
An apparatus as defined in claim 7, wherein said pressure between said discs is sensed by a sensing element sensing said pressure directly.
Claim 8
Dependent Claim
40 words
An apparatus as defined in claim 7, further comprising means for sensing said working pressure, means for comparing said working pressure with said pressure between said discs and operating said control means to adjust said amount of dilution water added.
References Cited (Backward Citations)
US2156320A
Cited
US2561043A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |