US3764005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrocyclone pulp cleaner
Assignee: Officemax Inc
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Filing: 1971-02-22
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Granted: 1973-10-09
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Expires: 1991-02-22
Abstract
Abstract This invention is a hydrocyclone pulp cleaner having a single conical shell divided into two separation chambers by an improved baffle construction which materially increases the efficiency of separation thus increasing the percentage of acceptable material and reducing the percentage of bottom reject material. The dividing baffle is constructed to provide an inlet for the material entering upper portion of the bottom chamber in a substantially tangential direction at the upper portion of the side wall of the lower chamber and in the form disclosed the size of the inlet opening is adjustable. The baffle is also designed to retard the flow of pulp from the top to the bottom chamber and is provided with a central discharge to remove the acceptable material from the bottom separation chamber upwardly through the baffle.
Inventors
- 👤 R Zemanek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:36
CPC Classifications
B; B04; B04C; B04C5/00; B04C5/24; B04C5/26; B04C5/14; B04C5/16
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
226 words
A hydrocyclone pulp cleaner for separating impurities from wood pulp comprising, as a single stage cleaning unit, a baffle member, a casing portion defining with said baffle member a first conical chamber having a pulp inlet at the upper large diameter end thereof, said inlet disposed so that cyclonic rotational movement is produced in the pulp being supplied to said chamber, and having a centrally disposed discharge conduit at the large diameter upper end thereof for removing acceptable pulp therefrom, a casing portion defining with said baffle member a second conical chamber connected to the lower end of the first chamber and having a final reject outlet opening at the bottom thereof, said baffle member disposed between said first and second chambers having passage means at the outward portion thereof permitting pulp to flow from a position near the side wall of the bottom of the first chamber into the top of the second chamber in a manner to produce rotational cyclonic movement in the body of pulp discharged into said second chamber, and a central conduit section in the upper portion of said second chamber for removing the acceptable pulp therefrom, and means for adjustably varying the differential pressure between the pulp inlet and at least certain of said pulp discharge outlets of the cleaning unit to regulate the pulp flow conditions in said unit.
Claim 2
Dependent Claim
226 words
A hydrocyclone pulp cleaner for separating impurities from wood pulp comprising, as a single stage cleaning unit, a baffle member, a casing portion defining with said baffle member a first conical chamber having a pulp inlet at the upper large diameter end thereof, said inlet disposed so that cyclonic rotational movement is produced in the pulp being supplied to said chamber, and having a centrally disposed discharge conduit at the large diameter upper end thereof for removing acceptable pulp therefrom, a casing portion defining with said baffle member a second conical chamber connected to the lower end of the first chamber and having a final reject outlet opening at the bottom thereof, said baffle member disposed between said first and second chambers having passage means at the outward portion thereof permitting pulp to flow from a position near the side wall of the bottom of the first chamber into the top of the second chamber in a manner to produce rotational cyclonic movement in the body of pulp discharged into said second chamber, and a central conduit section in the upper portion of said second chamber for removing the acceptable pulp therefrom, and means for adjustably varying the differential pressure between the pulp inlet and at least certain of said pulp discharge outlets of the cleaning unit to regulate the pulp flow conditions in said unit.
Claim 3
Dependent Claim
58 words
Structure set forth in claim 1 and said baffle comprising an inverted cup-shaped member having a generally cylindrical side wall portion with a tangentially directed opening formed therein to tangentially discharge into the upper portion of the second chamber, the portion of the pulp circulating in close association to the lower inside wall surface of the first chamber.
Claim 4
Dependent Claim
21 words
Structure set forth in claim 2 and means for varying the size of the discharge opening in said baffle side wall.
Claim 5
Dependent Claim
31 words
Structure set forth in claim 3 and said means comprising an axially adjustable valve member mounted adjacent said opening and adjustably projectable longitudinally thereof for varying the length of said opening.
Claim 6
Dependent Claim
26 words
Structure set forth in claim 3 and valve means for varying the flow of pulp through said inlet and the discharge conduits from the two chambers.
Claim 7
Dependent Claim
55 words
Structure set forth in claim 4 and said valve member comprising the upper portion of the casing defining the second chamber, said casing having a threaded connection with the side wall of said baffle member whereby rotation of the casing projects the upper portion thereof upwardly and downwardly to vary the length of said opening.
Claim 8
Dependent Claim
37 words
Structure set forth in claim 1 and valve means for controlling the flow through said central discharge conduit connected to the first chamber to adjust the back pressure of the acceptable material flowing from said first chamber.
Claim 9
Dependent Claim
28 words
The structure set forth in claim 7 and valve means for controlling the flow of pulp through the pulp inlet at thE upper end of the first chamber.
Claim 10
Dependent Claim
29 words
Structure set forth in claim 8 and valve means for controlling the flow of acceptable pulp through the central conduit section in the upper portion of said second chamber.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |