US4430155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of macrospherical particles
Assignee: Reheis Co Inc
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Filing: 1982-06-15
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Granted: 1984-02-07
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Expires: 2002-06-15
Abstract
Abstract A process and improved apparatus are provided for producing macrospherical particles. The particles themselves have increased wall thicknesses and higher densities than particles produced by conventional means and are thus not subject to deep lung penetration. The produced particles are also of controlled (narrow) particle size distribution. Such particles are particularly well adapted for use as anti-perspirants. The process for producing the particles comprises providing a solution containing the materials from which the particles are made, dispersing the solution along a plurality of radially disposed bristles by centrifugal force into discrete liquid droplets and drying the solution droplets in a stream of heated air. The improved apparatus comprises mounting a rotatable atomizer having a plurality of bristles inside a spray drying chamber.
Inventors
- 👤 James F. Kozischek
- 👤 M. Donner Martin, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:56
CPC Classifications
B; B05; B05B; B05B3/00; B05B3/02; B05B3/10; B05B3/1057; B01; B01D; B01D1/00; B01D1/16; B01D1/18; B01D1/20; B05B3/1007; B05B3/1021; B05B3/001
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
76 words
A process for producing dry, thick-walled macrospherical particles of controlled particle size distribution comprising providing a solution from a generally centrally located source, said solution containing material from which said particles are made, dispersing said solution outwardly along a plurality of radially disposed bristles by centrifugal force to form discrete liquid droplets and drying said droplets in a stream of heated gas to form said particles after said droplets leave the free ends of said bristles.
Claim 2
Dependent Claim
76 words
A process for producing dry, thick-walled macrospherical particles of controlled particle size distribution comprising providing a solution from a generally centrally located source, said solution containing material from which said particles are made, dispersing said solution outwardly along a plurality of radially disposed bristles by centrifugal force to form discrete liquid droplets and drying said droplets in a stream of heated gas to form said particles after said droplets leave the free ends of said bristles.
Claim 3
Dependent Claim
12 words
The process according to claim 1 wherein said solution comprises aluminum chloride.
Claim 4
Dependent Claim
112 words
A spray drier having a spray drying chamber for producing particles from a solution containing material from which said particles are made comprising a centrifugal atomizer, wherein said atomizer comprises an atomizer head comprising one or more fluid inlets for receiving said solution from a generally centrally located source, one or more fluid outlets and a plurality of bristles extending radially outward from each of said fluid outlets, and drive means attached to said atomizer head for rotating said atomizer at high peripheral speeds, said atomizer mounted in said spray drying chamber to receive solution droplets from the outward bristle ends and produce dry, thick-walled macrospherical particles of controlled particle size distribution.
Claim 5
Dependent Claim
112 words
A spray drier having a spray drying chamber for producing particles from a solution containing material from which said particles are made comprising a centrifugal atomizer, wherein said atomizer comprises an atomizer head comprising one or more fluid inlets for receiving said solution from a generally centrally located source, one or more fluid outlets and a plurality of bristles extending radially outward from each of said fluid outlets, and drive means attached to said atomizer head for rotating said atomizer at high peripheral speeds, said atomizer mounted in said spray drying chamber to receive solution droplets from the outward bristle ends and produce dry, thick-walled macrospherical particles of controlled particle size distribution.
Claim 6
Dependent Claim
18 words
The apparatus according to claim 3 wherein said plurality of bristles are in the form of a brush.
Claim 7
Dependent Claim
30 words
The apparatus according to claim 3 wherein said plurality of bristles is formed by a plurality of fibers wrapped around a post such that each fiber forms two bristle ends.
Claim 8
Dependent Claim
17 words
The apparatus according to claim 5 wherein said fibers are vertically stacked one on top of another.
Claim 9
Dependent Claim
11 words
The apparatus according to claim 3 wherein said bristles are wires.
Claim 10
Dependent Claim
19 words
The apparatus according to claim 3 wherein said atomizer further comprises baffle means positioned upstream of said fluid outlets.
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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) | 1987-02-06 | 1987-08-08 | 1988-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-06 | 1991-08-08 | 1992-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-06 | 1995-08-08 | 1996-02-07 | $7700.00 | Window Closed / Lapsed |