US4116384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic powder coating apparatus
Assignee: Individual
•
Filing: 1977-05-31
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Granted: 1978-09-26
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Expires: 1997-05-31
Abstract
Abstract Electrostatic powder-coating method, whereby a flat fan-spray of electrically charged powder particles is directed toward an object to be coated, said spray being formed from an incident stream consisting of a mixture of powder and carrier-gas, comprising means for re-homogenizing said incident stream, means for subsequently deflecting said stream in a direction substantially perpendicular to its incident direction, means for thereafter driving said stream against the internal walls of a duct designed to convert said stream into a fan-shaped spray, and means for electrically charging the powder particles of the said spray. The re-homogenizing means may, however, be omitted in certain cases.
Inventors
- 👤 Adrien Lacchia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:12
CPC Classifications
B; B05; B05B; B05B5/00; B05B5/025; B05B5/03; B05B5/032
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
89 words
An electrostatic powder spraying nozzle including a slot type exit to effect a fan shape discharge comprising: passage means for directing a stream of powder carrier gas mixture; duct means downstream of said passage means; and a flat plate deflector means disposed normal to said duct means, at an intermediate section thereof and so spaced from the duct defining walls of the duct means whereby to effect a generally uniform distribution of said mixture at the exit slot; said duct means converting said stream to a flat fan shape.
Claim 2
Dependent Claim
89 words
An electrostatic powder spraying nozzle including a slot type exit to effect a fan shape discharge comprising: passage means for directing a stream of powder carrier gas mixture; duct means downstream of said passage means; and a flat plate deflector means disposed normal to said duct means, at an intermediate section thereof and so spaced from the duct defining walls of the duct means whereby to effect a generally uniform distribution of said mixture at the exit slot; said duct means converting said stream to a flat fan shape.
Claim 3
Dependent Claim
33 words
An electrostatic powder-spraying nozzle according to claim 1 wherein said nozzle further comprises means upstream of said passage means for homogenizing the stream of powder-carrier gas mixture which flows through said passage means.
Claim 4
Dependent Claim
19 words
An electrostatic powder-spraying nozzle according to claim 2 wherein said homogenizing means comprise a convergent-divergent passage in said nozzle.
References Cited (Backward Citations)
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Cited
US3263127A
Cited
US3536514A
Cited
CH435052A
Cited
CH470914A
Cited
US3498541A
Cited
DE1814820A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-25 | 1982-03-27 | 1982-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-25 | 1986-03-27 | 1986-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-25 | 1990-03-27 | 1990-09-26 | $7700.00 | Window Closed / Lapsed |