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US3593371A
Expired / Lapsed
US
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Apparatus for producing improved pellets of a powder
Assignee: Cities Service Co
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Filing: 1968-11-28
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Granted: 1971-07-20
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Expires: 1988-11-28
Abstract
Abstract A powdered material is transformed into generally spherical pellets so that the bulk density of the material is increased while making it nicer to handle and cheaper to transport. Generally a liquid pelletizing medium is uniformly distributed throughout the cross section of a mass of the powder as it is subjected to vigorous mechanical agitation while advancing through an elongated zone of agitation. When pelletizing carbon blacks, pellets may be produced which have novel physical characteristics as regards the mass strength to crushing strength ratio of the pellets.
Inventors
- 👤 Richard E Driscoll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:23
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C09C1/58; B; B01; B01F; B01F27/00; B01F27/60; B01F27/62; B01J; B01J2/00; B01J2/10; B01F27/05; B01F27/11; B01F27/112; C01; C01P; C01P2006/00; C01P2006/10
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
67 words
The apparatus of claim 1 in which the jet is located proximal to the plane of rotation of one or more of said agitating members, said jet being directed into the plane of rotation of the said one or more agitating members and adapted to distribute a liquid pelletizing medium substantially evenly across the radial dimension of the last rotational plane into which the liquid is directed.
Claim 2
Dependent Claim
23 words
The apparatus of claim 1 in which the jet is directed in parallel relation to the plane of rotation of the agitating members.
Claim 3
Dependent Claim
49 words
The apparatus of claim 2 in which the jet is directed at an angle within the range of about 0 to about + or - 45* when measured from a line which is perpendicular to the plane of rotation of the agitating members into which the liquid is directed.
Claim 4
Dependent Claim
22 words
The apparatus of claim 1 in which said jet is conjunctive with a liquid-supplying conduit which extends transversally into said agitation zone.
Claim 5
Dependent Claim
21 words
The apparatus of claim 5 in which a multiplicity of jets are spaced evenly along the internal extension of liquid-supplying conduit.
Claim 6
Dependent Claim
18 words
The apparatus of claim 6 in which the multiplicity of the jets have coplanar axes of liquid projecting.
Claim 7
Dependent Claim
19 words
The apparatus of claim 5 in which the transversally extending conduit is at least partially rotatable about its axis.
Claim 8
Dependent Claim
30 words
The apparatus of claim 8 in which the transversally extending conduit is rotatable through an arc of at least about 90* in respect to the axis of the elongated conduit.
Claim 9
Dependent Claim
25 words
The apparatus of claim 5 in which the axis of the transversally extending liquid supplying conduit is perpendicular to the axis of the elongated conduit.
Claim 10
Dependent Claim
175 words
In an apparatus for wet pelletizing powdered matErial comprising an elongated conduit for containing a mass of the powder during agitation thereof, a powder inlet opening near one end of said conduit and a pellet discharge outlet toward the other end of the conduit, a rotatable shaft member extending into said conduit and arranged axially in respect thereto, a series of longitudinally spaced agitating members affixed to said rotatable shaft and extending essentially radially outward therefrom the the proximity of the inside surface of said elongated conduit, and means for feeding powder and a liquid pelletizing medium into elongated conduit at controlled rates, the improvement which comprises at least one jet located inside the elongated conduit, said jet being adapted to inject the liquid pelletizing medium substantially uniformly into the cross section of the powder mass contained by said elongated conduit, and wherein said jet is conjunctive with a liquid-supplying conduit which extends transversally into the elongated conduit which contains the agitating members, and said transversally extending conduit is least partially rotatable about its axis.
Claim 11
Dependent Claim
22 words
The apparatus of claim 11 in which a multiplicity of jets are spaced evenly along the internal extension of the liquid-supply conduit.
Claim 12
Dependent Claim
17 words
The apparatus of claim 12 in which the multiplicity of jets have coplanar axes of liquid projection.
Claim 13
Dependent Claim
30 words
The apparatus of claim 11 in which the transversally extending conduit is rotatable through an arc of at least about 90* with respect to the axis of the elongated conduit.
Claim 14
Dependent Claim
25 words
The apparatus of claim 11 in which the axis of the transversally extending liquid-supplying conduit is substantially perpendicular to the axis of the elongated conduit.
References Cited (Backward Citations)
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Cited
US2805156A
Cited
US3304355A
Cited
US3186687A
Cited
US3326642A
Cited
US3333038A
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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) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |