US4401695A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for applying powder coating reactants
Assignee: PPG Industries Ohio Inc
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Filing: 1982-06-01
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Granted: 1983-08-30
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Expires: 2002-06-01
Abstract
Abstract A method is disclosed for depositing a coating from a gaseous stream of a powder coating reactant, wherein the carrier gas is supplied at a high volume rate (at least 100 cubic ft./min) and low pressure (not greater than one psi).
Inventors
- 👤 John F. Sopko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:29
CPC Classifications
B; B05; B05D; B05D1/00; B05D1/02; B05D1/12; C; C03; C03C; C03C17/00; C03C17/001; C03C17/002; C03C17/22; C03C17/23; C03C2217/00; C03C2217/20; C03C2217/21; C03C2217/211; C03C2217/229; C03C2217/23; C03C2218/00; C03C2218/10; C03C2218/17
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
95 words
In a method for coating a substrate with a film by contacting a surface of the substrate with a powder coating reactant comprising the steps of dispersing said powder coating reactant in a carrier gas stream; creating turbulence in said stream; and delivering the powder coating reactant/carrier gas mixture to the surface to be coated, the improvement which comprises dispersing said powder coating reactant in a carrier gas which is supplied at a rate of at least about 100 cubic feet per minute and at a pressure not greater than one pound per square inch.
Claim 2
Dependent Claim
95 words
In a method for coating a substrate with a film by contacting a surface of the substrate with a powder coating reactant comprising the steps of dispersing said powder coating reactant in a carrier gas stream; creating turbulence in said stream; and delivering the powder coating reactant/carrier gas mixture to the surface to be coated, the improvement which comprises dispersing said powder coating reactant in a carrier gas which is supplied at a rate of at least about 100 cubic feet per minute and at a pressure not greater than one pound per square inch.
Claim 3
Dependent Claim
22 words
The method according to claim 1, wherein the average particle size of the reactant is reduced to less than about 10 microns.
Claim 4
Dependent Claim
15 words
The method according to claim 2, wherein the particle size is reduced by jet milling.
Claim 5
Dependent Claim
20 words
The method according to claim 1, wherein the powder coating reactant is dispersed in a carrier gas at ambient temperatures.
Claim 6
Dependent Claim
12 words
The method according to claim 1, wherein the carrier gas is air
Claim 7
Dependent Claim
25 words
The method according to claim 1, wherein the powder coating reactant/carrier gas mixture is delivered to the surface to be coated through a slot-shaped nozzle.
Claim 8
Dependent Claim
34 words
The method according to claim 6, wherein the slot-shaped nozzle is not more than 1/8 inch (1.6 millimeters) wide and is substantially as long as the parallel dimension of the surface to be coated.
Claim 9
Dependent Claim
26 words
The method according to claim 1, wherein the substrate is contacted with the coating reactant/carrier gas mixture at a temperature sufficient to pyrolyze the coating reactant.
References Cited (Backward Citations)
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US4172159A
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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) | 1986-08-29 | 1987-02-28 | 1987-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-29 | 1991-02-28 | 1991-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-29 | 1995-02-28 | 1995-08-30 | $7700.00 | Window Closed / Lapsed |