US3877415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for applying coatings to solid particles
Assignee: Tennessee Valley Authority
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Filing: 1974-02-01
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Granted: 1975-04-15
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Expires: 1994-02-01
Abstract
Abstract The apparatus provides a homogeneous (with respect to particle size), dense, mass of sized particles in random motion so that highly uniform coatings of the same or of different solids can be applied to each particle by conventional spray-coating with the liquified coating material(s). The apparatus is a horizontal rotary drum containing lifting flights. A novel deflector pan is fixed in space inside the upper section of the drum which deflects particles falling from the lifting flights to the side of the drum where they form a narrow, dense falling cascade. The coating material is sprayed onto the cascading particles, preferably as they free-fall after leaving the lower edge of the pan. However, if desired, some or most of the coating material may be directed onto the top edge of the moving bed including the juncture of the cascade therewith.
Inventors
- 👤 Glenn M Blouin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:05
CPC Classifications
B; B05; B05B; B05B13/00; B05B13/02; A; A23; A23P; A23P10/00; A23P10/30; A23P20/00; A23P20/10; A23P20/15; A61; A61K; A61K9/00; A61K9/20; A61K9/28; B01; B01F; B01F29/00; B01F29/25; B01F29/60; B01F29/61; B01F29/63; B01J; B01J2/00; B01J2/006; C; C05; C05C; C05C9/00; C05C9/005; A23P20/18; Y; Y10; Y10S; Y10S118/00; Y10S118/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
295 words
In an improved device of the class described including a rotary cylindrical drum having open ends and a length at least equal to its diameter disposed with its axis generally in about a horizontal attitude; a plurality of generally equally spaced lifting flights located on the inner peripheral surface of said drum and extending generally inwardly toward the axis thereof; two retaining rings singly disposed at the ends of said drum; liquid distributing means generally located in that lower quadrant, when viewed in a plane perpendicular to the axis of said drum, into which a point located at the bottommost position on said inner peripheral surface of said drum would next enter; said distributing means being substantially equal to the length of said drum between said retaining rings and generally disposed within said drum parallel to the axis thereof, and means for passing a current of gas through said drum; the improvement in combination therewith which comprises: deflector means rigidly supported by support means located outside the confines of said drum; said deflector means positioned within the confines of said drum and being of a length substantially equal to the length of said drum between said retaining rings and in a plane substantially parallel with the axis of said drum, said plane located horizontally above said axis; said deflector means along the width thereof being generally horizontally inclined upwardly into that first upper quadrant which is 180* removed from said lower quadrant, the width of said deflector means being predetermined to allow for rotation of said drum and lifting flights thereover, and said deflector means having a discharge aperture along the lower edge thereof parallel to the axis of said drum and generally located in that second upper quadrant 90* removed from said lower quadrant.
Claim 2
Dependent Claim
295 words
In an improved device of the class described including a rotary cylindrical drum having open ends and a length at least equal to its diameter disposed with its axis generally in about a horizontal attitude; a plurality of generally equally spaced lifting flights located on the inner peripheral surface of said drum and extending generally inwardly toward the axis thereof; two retaining rings singly disposed at the ends of said drum; liquid distributing means generally located in that lower quadrant, when viewed in a plane perpendicular to the axis of said drum, into which a point located at the bottommost position on said inner peripheral surface of said drum would next enter; said distributing means being substantially equal to the length of said drum between said retaining rings and generally disposed within said drum parallel to the axis thereof, and means for passing a current of gas through said drum; the improvement in combination therewith which comprises: deflector means rigidly supported by support means located outside the confines of said drum; said deflector means positioned within the confines of said drum and being of a length substantially equal to the length of said drum between said retaining rings and in a plane substantially parallel with the axis of said drum, said plane located horizontally above said axis; said deflector means along the width thereof being generally horizontally inclined upwardly into that first upper quadrant which is 180* removed from said lower quadrant, the width of said deflector means being predetermined to allow for rotation of said drum and lifting flights thereover, and said deflector means having a discharge aperture along the lower edge thereof parallel to the axis of said drum and generally located in that second upper quadrant 90* removed from said lower quadrant.
Claim 3
Dependent Claim
315 words
In an improved device of the class described including a rotary cylindrical drum having open ends and a length at leaSt equal to its diameter disposed with its axis generally in about a horizontal attitude, a plurality of generally equally spaced lifting flights located on the inner peripheral surface of said drum and extending generally inwardly toward the axis thereof; two retaining rings singly disposed at the ends of said drum; liquid distributing means generally located in that lower quadrant, when viewed in a plane perpendicular to the axis of said drum, into which a point located at the bottommost position on said inner peripheral surface of said drum would next enter; said distributing means being substantially equal to the length of said drum between said retaining rings and generally disposed within said drum parallel to the axis thereof, and means for passing a current of gas through said drum; the improvement in combination therewith which comprises: deflector means rigidly supported by support means located outside the confines of said drum; said deflector means positioned within the confines of said drum and being of a length substantially equal to the length of said drum between said retaining rings, and described by two planes each substantially parallel to the axis of said drum and intersecting in a line, said line substantially parallel to the axis of said drum and located horizontally above said axis, said planes along the width thereof being generally horizontally inclined downwardly from said line with the terminus of at least one of said planes located in that first upper quadrant, which is 90* removed from said lower quadrant, the width of said deflector means being predetermined to allow for rotation of said drum and lifting flights thereover, and said deflector means having discharge apertures along each of the lower edges of said two intersecting planes parallel to the axis of said drum.
Claim 4
Dependent Claim
315 words
In an improved device of the class described including a rotary cylindrical drum having open ends and a length at leaSt equal to its diameter disposed with its axis generally in about a horizontal attitude, a plurality of generally equally spaced lifting flights located on the inner peripheral surface of said drum and extending generally inwardly toward the axis thereof; two retaining rings singly disposed at the ends of said drum; liquid distributing means generally located in that lower quadrant, when viewed in a plane perpendicular to the axis of said drum, into which a point located at the bottommost position on said inner peripheral surface of said drum would next enter; said distributing means being substantially equal to the length of said drum between said retaining rings and generally disposed within said drum parallel to the axis thereof, and means for passing a current of gas through said drum; the improvement in combination therewith which comprises: deflector means rigidly supported by support means located outside the confines of said drum; said deflector means positioned within the confines of said drum and being of a length substantially equal to the length of said drum between said retaining rings, and described by two planes each substantially parallel to the axis of said drum and intersecting in a line, said line substantially parallel to the axis of said drum and located horizontally above said axis, said planes along the width thereof being generally horizontally inclined downwardly from said line with the terminus of at least one of said planes located in that first upper quadrant, which is 90* removed from said lower quadrant, the width of said deflector means being predetermined to allow for rotation of said drum and lifting flights thereover, and said deflector means having discharge apertures along each of the lower edges of said two intersecting planes parallel to the axis of said drum.
Claim 5
Dependent Claim
36 words
The improved device of claim 1 wherein the attitude of at least some of said lifting flights toward the axis of said drum is varied from the attitude of the remaining lifting flights in alternate sequence.
Claim 6
Dependent Claim
36 words
The improved device of claim 2 wherein the attitude of at least some of said lifting flights toward the axis of said drum is varied from the attitude of the remaining lifting flights in alternate sequence.
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) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |