US3593678A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic coating methods and apparatus
Assignee: Ransburg Corp
•
Filing: 1969-01-02
•
Granted: 1971-07-20
•
Expires: 1989-01-02
Abstract
Abstract An apparatus for coating a surface of an article with particles of a powder. A gas-permeable plate is mounted in a chamber and is used to support a layer of particles in the chamber. Means passes gas through the plate to cause the particles to form a cloud in the chamber. The article to be coated is in the cloud of particles. An electrode means is above the article to be coated with particles. Means establishes on electrostatic field between the electrode means and the article for charging the particles and collecting their deposition on the article.
Inventors
- 👤 Emery P Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:19
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/20; H01J9/22; H01J9/221; H01J9/225; B; B05; B05C; B05C19/00; B05C19/02; B05C19/025; Y; Y10; Y10S; Y10S118/00; Y10S118/05
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
32 words
The invention as set forth in claim 1 with the addition that means are provided for moving said article and electrode means relative to each other while maintaining a constant spacing therebetween.
Claim 2
Dependent Claim
37 words
The invention as set forth in claim 1 in which said chamber has an open upper end and a jacket is disposed around said chamber in spaced relation thereto for collecting any nondeposited particles exiting said chamber.
Claim 3
Dependent Claim
34 words
The invention as set forth in claim 3 with the addition that said jacket is connected to a collector reservoir and means are provided for conveying the powder in said jacket to said reservoir.
Claim 4
Dependent Claim
40 words
The invention as set forth in claim 1 in which said support means is arranged relative to said chamber in such a way as to provide a loading position outside of said chamber and a coating position within said chamber.
Claim 5
Independent Claim
123 words
An apparatus for coating an article with particles of a powder, comprising a deposition chamber, a gas-permeable plate mounted in said chamber supporting a layer of the particles in the chamber, an electrode means carried above said chamber, an article support means in said chamber, means for forcing gas through said plate to cause said particles to move upwardly toward the top of said chamber and toward said electrode means, a jacket around said chamber in spaced relation thereto, a support on said jacket for supporting said electrode means, and means for establishing an electrostatic field between said electrode means and an article on said support means for charging said particles and effecting their deposition on an article on said article support means.
Claim 6
Dependent Claim
31 words
The invention as set forth in claim 6 in which said electrode is connected to a motor mounted on said electrode support for rotating the electrode with respect to the article.
Claim 7
Independent Claim
126 words
An apparatus for coating an article with particles of a powder, comprising a deposition chamber having an open upper end, an gas-permeable plate mounted in the chamber for supporting a layer of particles in said chamber, electrode means carried on said chamber, electrically conductive support means associated with the chamber and adapted to engage and support the article above said layer, means for forcing gas through said plate to cause said particles to move upwardly toward the top of said chamber, electrode means positioned adjacent the open uPper end of said chamber and above the article to have particles deposited thereon, and means for establishing an electrostatic field between said electrode means and the article for charging said particles and effecting their deposition on the article.
Claim 8
Dependent Claim
26 words
The invention as set forth in claim 8 in which a jacket is disposed around said chamber in spaced relation thereto for collecting any nondeposited particles.
Claim 9
Independent Claim
171 words
An apparatus for coating an article with particles of a powder, comprising a deposition chamber having an open upper end, a gas-permeable plate mounted in the chamber for supporting a layer of the particles in said chamber, electrode means carried in said chamber, hanger means adapted to support the article and to move it from without into said chamber through a suitable opening, means for forcing gas through said plate to cause said particles to move upwardly toward the open top of said chamber, means associated with the movement of said support means for closing said opening when said gas forcing means is active, a second means associated with the movement of said support means for closing said opening when said gas means is not active, an electrode positioned near the top of said chamber and above the article to have particles deposited thereon, and means for establishing an electrostatic field between said electrode means and article in said chamber for charging said particles and effecting their deposition on the article.
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) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |