US3787241A
Expired / Lapsed
US
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Apparatus for processing degradation of cellulosic materials
Assignee: Individual
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Filing: 1971-07-19
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Granted: 1974-01-22
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Expires: 1991-07-19
Abstract
Abstract An apparatus, for decomposing cellulosic materials, in the form of a percolator vessel, has a conical filter disposed with apertures which is mounted on the lower portion of the vessel. A system of liquid and steam valves controlling the inlets and outlets to the percolator vessel is used to treat cellulosic material in a series of steps with resulting decomposition of almost the entire load of material initially placed into the percolator.
Inventors
- 👤 R Eickemeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:36
CPC Classifications
D; D21; D21C; D21C7/00; C; C13; C13K; C13K1/00; C13K1/02; C13K13/00; C13K13/002; D21C3/00; D21C3/22
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
39 words
A percolator as in claim 1, wherein the total cross-sectional areas of the apertures in said peripheral wall is equal to between 0.5 and 1.5 percent of the interior cross-sectional area of the percolator vessel at the bottom thereof.
Claim 2
Dependent Claim
26 words
A percolator as in claim 1, wherein said apertures have a minimum diamEter at the inner surface of said wall of between 2 and 5 mm.
Claim 3
Dependent Claim
26 words
A percolator as in claim 1, wherein said apertures have a minimum diameter at the inner surface of said wall of between 3 and 4 mm.
Claim 4
Dependent Claim
39 words
A percolator as defined in claim 1, wherein the combined cross sectional areas of said apertures are substantially in the range corresponding to 0.2-4 percent of the interior cross sectional area of the percolator vessel at the bottom thereof.
Claim 5
Dependent Claim
28 words
A percolator as in claim 1, wherein the apertures are arranged in a plurality of horizontal rows and wherein the distance between adjacent rows decreases in downward direction.
Claim 6
Dependent Claim
28 words
A percolator as in claim 6, wherein the spacing between the lowermost rows is equal to between 1/2 and 1/3 of the spacing between the two top rows.
Claim 7
Dependent Claim
30 words
A percolator as in claim 6, wherein the apertures of adjacent rows are disposed in a manner as to be offset, in the horizontal direction with reference to each other.
Claim 8
Dependent Claim
56 words
A percolator as in claim 6, wherein the horizontal spacing between said apertures is equal to 50mm in the top row and decreases uniformly towards the bottom and wherein the vertical spacing between apertures is equal to 50 mm, as measured along the surface of the filter, and decreases uniformly towards the bottom to 20 mm.
Claim 9
Dependent Claim
42 words
A percolator as in claim 1, wherein the percolator vessel has a lower conical portion and the filter means has a conical peripheral wall, and wherein the filter means is attached to the wall of said conical portion of the percolator vessel.
Claim 10
Dependent Claim
19 words
A percolator as in claim 10, wherein the top end of said peripheral wall portion is free of perforations.
Claim 11
Dependent Claim
20 words
A percolator as in claim 10, wherein said conical peripheral wall of said filter has an inclination of 60 percent.
Claim 12
Dependent Claim
33 words
A percolator as in claim 10, wherein the filter means has an upper section and a lower section, the lower section having between 50 and 67 percent more apertures than the upper section.
Claim 13
Dependent Claim
73 words
A percolator as defined in claim 13, and including a sealing ring at the joint between said upper and lower sections and sealingly engaging the inner surface of said and the outer surface of said peripheral wall so as to divide said annular space into a pair of annular spaces separated from each other, said valve controlled passage means comprising separate valve controlled ducts respectively communicating with said pair of separate annular spaces.
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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |