US4099899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon black pelleter
Assignee: Phillips Petroleum Co
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Filing: 1976-06-28
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Granted: 1978-07-11
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Expires: 1996-06-28
Abstract
Abstract A longitudinal oscillatory motion is imparted to a rotating shaft of a carbon black pelleter. The movement of the rotating shaft in longitudinal direction varies the paths of the outer ends of the pins radially mounted on the shaft and traveling near the inner wall of the pelleter chamber thus preventing a buildup of carbon black cake on said wall.
Inventors
- 👤 Thomas J. Gunnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:01
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C09C1/58; C01; C01P; C01P2004/00; C01P2004/50
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
82 words
A carbon pelleter adapted to agglomerate particle carbon black introduced therein with a wetting agent, said pelleter comprising: (1) an elongated cylindrical chamber; (2) a rotating shaft extending through said chamber, said shaft having mounted thereon pins projecting radially outward and closely fitting inside the chamber; and (3) spring-loaded means actuated by a rotating disc for axially moving the rotating shaft back and forth during pelletizing operations so that the pins prevent formation of carbon deposits on the inside of the chamber.
Claim 2
Dependent Claim
82 words
A carbon pelleter adapted to agglomerate particle carbon black introduced therein with a wetting agent, said pelleter comprising: (1) an elongated cylindrical chamber; (2) a rotating shaft extending through said chamber, said shaft having mounted thereon pins projecting radially outward and closely fitting inside the chamber; and (3) spring-loaded means actuated by a rotating disc for axially moving the rotating shaft back and forth during pelletizing operations so that the pins prevent formation of carbon deposits on the inside of the chamber.
Claim 3
Dependent Claim
198 words
A pelleter as claimed in claim 1 wherein said means comprises: a disc having a flat side and a wedge-shaped side secured by said flat side to the end of the rotatable shaft extending outside the chamber; a spring having an inner and an outer end co-axially positioned around the rotatable shaft between the disc and the chamber said inner end being held in a fixed axial position with respect to the chamber; a bearing retainer pin mounted on the shaft in a fixed axial position; a retainer mounted on the bearing, adapted to hold the spring in the co-axial position with respect to the shaft and to hold outer end of the spring in a fixed axial position with respect to the shaft; and a retractable rod positioned so as to press against the wedge-shaped side of the disc when in extended position, causing gradual shifting of the shaft toward the chamber as the thicker portions of the disc approach the retractable rod thereby causing compression of the spring, said shaft returning to its position by action of the compressed spring pushing against the retainer after the thickest point of the wedge-shaped disc by-passes the retractable rod.
Claim 4
Dependent Claim
33 words
A pelleter as claimed in claim 2 wherein the maximum difference in thickness of the wedge-shaped disc is at least equal to the maximum longitudinal spacing between adjacent pins mounted on the shaft.
Claim 5
Independent Claim
58 words
A method for pelletizing carbon black in a pelleter having a chamber and a rotating shaft said shaft having pins radially mounted thereon which comprises: introducing carbon black together with a wetting agent into the pelleter; and axially oscillating the rotating shaft so that the pins prevent buildup of carbon black cake on the inside of the chamber.
Claim 6
Independent Claim
58 words
A method for pelletizing carbon black in a pelleter having a chamber and a rotating shaft said shaft having pins radially mounted thereon which comprises: introducing carbon black together with a wetting agent into the pelleter; and axially oscillating the rotating shaft so that the pins prevent buildup of carbon black cake on the inside of the chamber.
Claim 7
Dependent Claim
50 words
A method for pelletizing carbon black as claimed in claim 4 wherein the maximum distance through which the rotating shaft oscillates is at least equal to the longitudinal axial distance between furthest spaced adjacent pins so that pins substantially prevent carbon black cake buildup on the inside of the chamber.
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) | 1981-07-10 | 1982-01-09 | 1982-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-10 | 1986-01-09 | 1986-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-10 | 1990-01-09 | 1990-07-11 | $7700.00 | Window Closed / Lapsed |