Patent US4030446A successfully refreshed from Google Patents.
US4030446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Directed flow ionization chamber in electrostatic coating
Assignee: E T TECH ACQUISITION CORP
•
Filing: 1976-04-30
•
Granted: 1977-06-21
•
Expires: 1996-04-30
Abstract
Abstract Electrostatic fluidized bed coating apparatus utilizes an electrode which provides a multiplicity of charge-concentrating portions, into contact with which an air stream is directed in a flow path conforming substantially to the form of and to effect ionization thereof. The ionized air is then used for simultaneous fluidization and charging of a particulate coating material.
Inventors
- 👤 Allan V. Karr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:21
CPC Classifications
B; B05; B05C; B05C19/00; B05C19/02; B05C19/025
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
135 words
Electrostatic fluidized bed coating apparatus comprising, in combination: a housing having a porous support member mounted therein to define within said housing a fluidization chamber thereabove in a plenum therebelow; electrode means having multiple charge-concentrating portions thereon; and means for directing air in a flow path conforming substantially to the form of and into contact with said charge-concentrating portions of said electrode means, to thereby ionize the air, said electrode means and said air-directing means being so disposed as to pass air through said plenum in a flow path from said directing means, into contact with said electrode means, and upwardly through said support member and into said coating chamber, whereby the resultant ionized air may be used to charge and fluidize a particulate coating material supported in said coating chamber on said support member.
Claim 2
Dependent Claim
135 words
Electrostatic fluidized bed coating apparatus comprising, in combination: a housing having a porous support member mounted therein to define within said housing a fluidization chamber thereabove in a plenum therebelow; electrode means having multiple charge-concentrating portions thereon; and means for directing air in a flow path conforming substantially to the form of and into contact with said charge-concentrating portions of said electrode means, to thereby ionize the air, said electrode means and said air-directing means being so disposed as to pass air through said plenum in a flow path from said directing means, into contact with said electrode means, and upwardly through said support member and into said coating chamber, whereby the resultant ionized air may be used to charge and fluidize a particulate coating material supported in said coating chamber on said support member.
Claim 3
Dependent Claim
45 words
The apparatus of claim 1 wherein said electrode means comprises a multiplicity of fine wires, and means for supporting said wires at one end with their free ends disposed in said air flow path, said free ends providing said charge-concentrating portions of said electrode means.
Claim 4
Dependent Claim
27 words
The apparatus of claim 2 wherein said supporting means is a shaft which said wires extend radially outwardly at a plurality of locations along the length thereof.
Claim 5
Dependent Claim
33 words
The apparatus of claim 3 wherein said wires are of substantially equal length, so that said free ends thereof are disposed on an imaginary cylindrical surface which is coaxially aligned with said shaft.
Claim 6
Dependent Claim
109 words
The apparatus of claim 4 wherein said shaft is mounted upon a generally horizontal base plate with its axis normal thereto, said base plate having a multiplicity of holes therethrough disposed in a circular pattern about the base of said shaft, with the diameter of said circular pattern being substantially the same as that of said imaginary cylindrical surface, and wherein said apparatus includes a chamber under said base plate into which air may be introduced, said holes providing substantially the only outlet from said chamber, so that air introduced under pressure into said chamber flows from said holes in discreet streams toward said free ends of said wires.
Claim 7
Dependent Claim
15 words
The apparatus of claim 5 wherein said base plate defines the bottom of said plenum.
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) | 1980-06-20 | 1980-12-20 | 1981-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-20 | 1984-12-20 | 1985-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-20 | 1988-12-20 | 1989-06-21 | $7700.00 | Window Closed / Lapsed |