Patent US3913523A successfully refreshed from Google Patents.
US3913523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Powder coating apparatus
Assignee: Ransburg Corp
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Filing: 1974-03-25
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Granted: 1975-10-21
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Expires: 1994-03-25
Abstract
Abstract An electrostatic powder spraying apparatus that includes a nonrotating disk-like member having an edge; the electrostatic field extends between the edge of disk and articles to be coated. A first means of the apparatus deflects powder radially outwardly into a chamber. The chamber is adjacent the first means and provides space in which tangential streams impart a spiral motion or whirling cyclone-type motion to the radially deflected powder. An apertured means is spaced from the non-rotating disk-like member. The spiral motion of entrained powder moves it outwardly along the surface of the non-rotating disk-like member and causes air to be aspirated through the aperture to mix with the powder moving radially outwardly along the surface of the disk-like member. By this means the powder is given sufficient momentum to be ejected from the edge of the disk to the vicinity of an article at a powder attracting potential where the electrostatic field forces can guide the charged powder to the article.
Inventors
- 👤 Richard O Probst
- 👤 Ronald R Kendall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:29
CPC Classifications
B; B05; B05B; B05B5/00; B05B5/08; B05B5/14; B05B16/00; B05B16/40; B05B16/405; B05B5/025; B05B5/03; B05B5/032; B05B5/16; B05B5/1683; B05B13/00; B05B13/02; B05B13/04; B05B13/0405; B05B13/041; B05B13/0436; B05B13/0447
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
189 words
A system for coating an article with powder coating material including an enclosure defining a coating zone, means for moving the article over a substantially omega-shaped path within the enclosure, and non-rotating means for distributing the powder located at the approximate center of the omega-shaped path of the article and including a chamber and an orifice for ejecting the powder from the chamber, first means to deliver a flow of powder entrained in gas to the chamber of the powder-distributing means, the powder-distributing means having a powder direction changing deflector adjacent the orifice, the side walls of the chamber including a plurality of apertures directing gas jets into the chamber to swirl the powder in the chamber and to direct it radially outward from the chamber and over the powder direction changing deflector in an expanding fashion and toward the omegashaped path of the article, and an opening adjacent the deflector into which gas is aspirated by the movement of the gas entrained powder from the chamber, the deflector of the powder-distributing means cooperating to combine swirling gas and aspirated gas and to move the powder toward the article.
Claim 2
Independent Claim
189 words
A system for coating an article with powder coating material including an enclosure defining a coating zone, means for moving the article over a substantially omega-shaped path within the enclosure, and non-rotating means for distributing the powder located at the approximate center of the omega-shaped path of the article and including a chamber and an orifice for ejecting the powder from the chamber, first means to deliver a flow of powder entrained in gas to the chamber of the powder-distributing means, the powder-distributing means having a powder direction changing deflector adjacent the orifice, the side walls of the chamber including a plurality of apertures directing gas jets into the chamber to swirl the powder in the chamber and to direct it radially outward from the chamber and over the powder direction changing deflector in an expanding fashion and toward the omegashaped path of the article, and an opening adjacent the deflector into which gas is aspirated by the movement of the gas entrained powder from the chamber, the deflector of the powder-distributing means cooperating to combine swirling gas and aspirated gas and to move the powder toward the article.
Claim 3
Dependent Claim
55 words
The system for coating an article with powder coating material as claimed in claim 1, wherein the deflector of the powder-distributing means forms a slot and an edge of the powder-distributing means is connected to a voltage source so as to provide a high voltage gradient at the edge for charging powder leaving the slot.
Claim 4
Independent Claim
180 words
A system for coating an article with powder coating material including an enclosure defining a coating zone, first means moving the article along an arcuate path within the coating zone, and an apparatus for coating an article with particles of powder entrained in gas located at the approximate center of the path, second means to deliver a flow of powder entrained in gas to the powder coating apparatus, the apparatus being adapted to receive and project the powder entrained in gas, and including third means spaced from the orifice moving the powder projected from the orifice radially outward from an orifice toward the article to be coated, a nonrotating surface adjacent the third means across which the powder moves radially outwardly, and fourth means adjacent the surface across which the powder is traveling allowing additional gas to be introduced to the powder to provide a further volume of gas to assist in conveying the powder outwardly from the surface to the article to be coated with sufficient momentum to carry substantially all the powder to the vicinity of the article.
Claim 5
Independent Claim
180 words
A system for coating an article with powder coating material including an enclosure defining a coating zone, first means moving the article along an arcuate path within the coating zone, and an apparatus for coating an article with particles of powder entrained in gas located at the approximate center of the path, second means to deliver a flow of powder entrained in gas to the powder coating apparatus, the apparatus being adapted to receive and project the powder entrained in gas, and including third means spaced from the orifice moving the powder projected from the orifice radially outward from an orifice toward the article to be coated, a nonrotating surface adjacent the third means across which the powder moves radially outwardly, and fourth means adjacent the surface across which the powder is traveling allowing additional gas to be introduced to the powder to provide a further volume of gas to assist in conveying the powder outwardly from the surface to the article to be coated with sufficient momentum to carry substantially all the powder to the vicinity of the article.
Claim 6
Dependent Claim
27 words
The system for coating an article with powder coating material as claimed in claim 3, including means for electrostatically charging powder prior to deposition on the article.
Claim 7
Independent Claim
180 words
A system for coating an article with powder coating material including an enclosure defining a coating zone, first means moving the article along an arcuate path within the coating zone, and an apparatus for coating an article with particles of powder located at the approximate center of the path, second means to deliver a flow of powder entrained in gas to the powder coating apparatus, the apparatus being adapted to receive the powder entrained in gas and including third means to project the powder radially outwardly from an orifice toward the article to be coated, a nonrotating surface adjacent the third means across which the powder moves radially outwardly, fourth means adjacent the surface across which the powder is traveling allowing additional gas to be introduced to the powder to provide a further volume of gas to assist in conveying the powder outwardly from the surface to the article to be coated with sufficient momentum to carry substantially all the powder to the vicinity of the article, and fifth means for reclaiming powder coating material not deposted on the article.
Claim 8
Dependent Claim
95 words
The system for coating an article with powder coating maTerial as claimed in claim 5, wherein the enclosure is positioned generally about the article while the article is being coated, the enclosure confining the flow of gas and further volume of gas adjacent the first means to move undeposited powder coating material in the enclosure to the means for reclaiming powder coating material to thereby assist in removing the undeposited powder coating material from the enclosure and a powder collector means connected to the enclosure means for collecting undeposited powder moved from the enclosure means.
Claim 9
Independent Claim
121 words
An apparatus for coating an article with particles of powder entrained in a gas, including means having an orifice adapted to receive and project powder entrained in a gas, a substantially flat and radially expanding non-rotating surface across which the powder travels allowing additional gas to be introduced to the entrained powder providing a further volume of gas to assist in conveying the powder outwardly from an extremity of the surface and to the article to be coated with sufficient momentum to carry substantially all of the powder to the vicinity of the article, means for electrostatically charging powder prior to deposition on the article, and means to move the articles along an arcuate path during coating by the charged powder.
Claim 10
Independent Claim
121 words
An apparatus for coating an article with particles of powder entrained in a gas, including means having an orifice adapted to receive and project powder entrained in a gas, a substantially flat and radially expanding non-rotating surface across which the powder travels allowing additional gas to be introduced to the entrained powder providing a further volume of gas to assist in conveying the powder outwardly from an extremity of the surface and to the article to be coated with sufficient momentum to carry substantially all of the powder to the vicinity of the article, means for electrostatically charging powder prior to deposition on the article, and means to move the articles along an arcuate path during coating by the charged powder.
Claim 11
Dependent Claim
112 words
A system for coating an article with powder coating material, including the coating apparatus set forth in claim 7 comprising an enclosure surrounding said coating apparatus to define a coating zone, means for moving the article to be coated around the coating apparatus within the coating zone between the enclosure and the coating apparatus, said enclosure including a foraminous floor to support the undeposited powder and means to direct air upwardly through said foraminous floor to fluidize undeposited powder falling to the floor, said foraminous floor being so formed that the fluidized powder flows downwardly through an opening, and collecting means to remove the undeposited powder from the enclosure through said opening.
Claim 12
Dependent Claim
33 words
The system of claim 8 wherein said coating apparatus and said enclosure are coaxially arranged and said means to move the article from an omega-shaped path with the coating apparatus at its center.
Claim 13
Dependent Claim
47 words
The system of claim 8 wherein the coating apparatus is stationary and uses a flow of compressed air and a flow or induced air within the enclosure and passing within the coating apparatus to form a radially expanding pattern of powder extending to adjacent the omega-shaped path.
Claim 14
Dependent Claim
106 words
A system for coating an article with powder coating material, including the coating apparatus set forth in claim 7, an enclosure for said coating apparatus to define a coating zone, means for moving the article within the coating zone between the enclosure and the coating apparatus, said enclosure including a foraminous floor having openings to permit the powder to pass therethrough, a conically-shaped collecting means below said foraminous floor, an enclosure roof connected with means to provide air flow, said means to provide air flow and said collecting means providing air flow downwardly within the enclosure to remove undeposited powder from the enclosure at its bottom.
Claim 15
Dependent Claim
48 words
The system of claim 9 wherein the coating apparatus is located concentrically within the enclosure and the roof substantially and entirely closes the top of the enclosure, except an opening for said means to carry the articles which forms an omega-shaped path concentrically located around said coating apparatus.
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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) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |