Patent US3843054A successfully refreshed from Google Patents.
US3843054A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Powder apparatus
Assignee: Ransburg Corp
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Filing: 1972-08-07
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Granted: 1974-10-22
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Expires: 1992-08-07
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
- 👤 R Kendall
- 👤 R Probst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:32
CPC Classifications
B; B05; B05B; B05B5/00; B05B5/16; B05B5/1683; B05B16/00; B05B16/40; B05B16/405; B05B5/025; B05B5/03; B05B5/032; B05B5/08
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
149 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, means spaced from the orifice and in the path of powder flow from the orifice for deflecting outwardly the powder projected from the orifice, a non-rotating surface adjacent the means for deflecting the powder, the deflected powder traveling across the surface, means adjacent the surface across which the powder is traveling allowing gas to be aspirated so as to provide an additional 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, and means providing a high voltage gradient at the extremity of the surface for charging powder adjacent the extremity.
Claim 2
Independent Claim
149 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, means spaced from the orifice and in the path of powder flow from the orifice for deflecting outwardly the powder projected from the orifice, a non-rotating surface adjacent the means for deflecting the powder, the deflected powder traveling across the surface, means adjacent the surface across which the powder is traveling allowing gas to be aspirated so as to provide an additional 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, and means providing a high voltage gradient at the extremity of the surface for charging powder adjacent the extremity.
Claim 3
Dependent Claim
59 words
The apparatus for coating an article with particles of powder entrained in a gas as claimed in claim 1, wherein the surface is formed by a substantially flat, disk-like non-rotating member and wherein the means allowing gas to be aspirated is apertured and includes a substantially flat surface spaced from and parallel to the surface of the disk-like member.
Claim 4
Dependent Claim
54 words
The apparatus for coating an article with particles of powder entrained in a gas as claimed in claim 2, wherein the powder particles are projected from the extremity of the surface in a plane substantially parallel to the plane of an electrostatic field between the extremity of the surface and the article being coated.
Claim 5
Dependent Claim
43 words
The apparatus for coating an article with particles of powder entrained in a gas as claimed in claim 2, wherein the radial extent of the disk-like member is at least equal the radial extent of the substantially flat surface of the apertured means.
Claim 6
Dependent Claim
53 words
The apparatus for coating an article with particles of powder entrained in a gas as claimed in claim 2, wherein the axis of the orifice for projecting the entrained powder, the axis of the means for deflecting the powder outwardly and the axis of the aperture of the apertured means are substantially coincident.
Claim 7
Dependent Claim
43 words
The apparatus for coating an article with particles of powder entrained in a gas as claimed in claim 2, including means for providing the powder with swirling gas to assist in conveying the powder radially outward and to the article to be coated.
Claim 8
Dependent Claim
50 words
The apparatus for coating an article with particles of powder entrained in a gas as claimed in claim 6, wherein the means for providing swirling gas includes a chamber having apertured side walls that introduce jets of gas into the chamber substantially tangential to the side walls of the chamber.
Claim 9
Dependent Claim
182 words
An electrostatic apparatus for coating an article maintained at a particle attracting potential with particles of powder entrained in a gas including means having an orifice adapted to receive and project powder entrained in a gas, means spaced from the orifice and in the path of powder flow from the orifice for deflecting outwardly the powder projected from the orifice, a non-rotating surface adjacent the means for deflecting the powder and having a sharp edge, the deflected powder traveling across the non-rotating surface and passing in close proximity to the edge, the edge being adapted to be connected to a voltage source to provide a high voltage gradient at the edge for charging powder adjacent the edge, and apertured means adjacent the non-rotating surface across which the powder is traveling allowing gas to be aspirated through the apertured means to provide an additional volume of gas to assist in conveying the charged powder radially outwardly from the edge and to the article to be coated with sufficient momentum to carrying substantially all of the charged powder to the vicinity of the article.
Claim 10
Dependent Claim
182 words
An electrostatic apparatus for coating an article maintained at a particle attracting potential with particles of powder entrained in a gas including means having an orifice adapted to receive and project powder entrained in a gas, means spaced from the orifice and in the path of powder flow from the orifice for deflecting outwardly the powder projected from the orifice, a non-rotating surface adjacent the means for deflecting the powder and having a sharp edge, the deflected powder traveling across the non-rotating surface and passing in close proximity to the edge, the edge being adapted to be connected to a voltage source to provide a high voltage gradient at the edge for charging powder adjacent the edge, and apertured means adjacent the non-rotating surface across which the powder is traveling allowing gas to be aspirated through the apertured means to provide an additional volume of gas to assist in conveying the charged powder radially outwardly from the edge and to the article to be coated with sufficient momentum to carrying substantially all of the charged powder to the vicinity of the article.
Claim 11
Dependent Claim
64 words
The apparatus for coating an article with particles of powder entrained in a gas as claimed in claim 8, wherein the surface is provided by a disk-like member and the powder particles are projected from the edge of the disk in a plane substantially parallel to the plane of an electrostatic field between the edge of The disk-like member and the article being coated.
Claim 12
Dependent Claim
31 words
The apparatus for coating an article with particles of powder entrained in a gas as claimed in claim 8, further including means for reclaiming the powder not deposited on the article.
Claim 13
Dependent Claim
145 words
An electrostatic powder spraying apparatus including a non-rotating disk-like member having a sharp edge, the member adapted to be connected to a high voltage source to provide a high field gradient at the sharp edge for charging powder particles adjacent the edge, means defining a passage adapted to be connected to powder entrained in air for providing entrained powder to the non-rotating disk-like member, a first deflector deflecting powder radially outwardly along the surface of the disk-like member, a chamber adjacent the first deflector providing air to the radially deflected powder and an apertured second deflector spaced from the disk-like member, the movement of entrained powder outwardly along the surface of the disk aspirating air through the aperture so that the powder has sufficient momentum to be ejected from the edge of the disk to the vicinity of an article at a powder attracting potential.
Claim 14
Dependent Claim
145 words
An electrostatic powder spraying apparatus including a non-rotating disk-like member having a sharp edge, the member adapted to be connected to a high voltage source to provide a high field gradient at the sharp edge for charging powder particles adjacent the edge, means defining a passage adapted to be connected to powder entrained in air for providing entrained powder to the non-rotating disk-like member, a first deflector deflecting powder radially outwardly along the surface of the disk-like member, a chamber adjacent the first deflector providing air to the radially deflected powder and an apertured second deflector spaced from the disk-like member, the movement of entrained powder outwardly along the surface of the disk aspirating air through the aperture so that the powder has sufficient momentum to be ejected from the edge of the disk to the vicinity of an article at a powder attracting potential.
Claim 15
Dependent Claim
19 words
The electrostatic powder spraying apparatus as claimed in claim 11, wherein the first and second deflectors are substantially disk-like.
Claim 16
Dependent Claim
28 words
The electrostatic powder spraying apparatus as claimed in claim 12, wherein the apertured disk-like second deflector has a substantially flat surface in close proximity with the disk-like member.
Claim 17
Dependent Claim
31 words
The electrostatic powder spraying apparatus as claimed in claim 13, including means for adjusting the distance between the flat surface of the second deflector and the surface of the disk-like member.
Claim 18
Dependent Claim
153 words
Means for coating an article with particles of powder comprising a non-rotating apparatus for providing a spray of powder, the apparatus having an interior portion and an opening to permit flow from its interior portion, first means to deliver a flow of entrained powder to the interior portion of the apparatus, second means to deliver a jet of air to the interior portion of the apparatus to effect a more uniform flow of powder from the opening of the apparatus, third means to permit a flow of atmosphere to be induced into the interior portion of the apparatus by the flow of powder and air through the opening, and to be added to the flow of powder and air from the opening means to form the flowing powder and air into a radially expanding spray and electrostatic means to charge the powder spray to effect its deposition on the article to be coated.
Claim 19
Dependent Claim
153 words
Means for coating an article with particles of powder comprising a non-rotating apparatus for providing a spray of powder, the apparatus having an interior portion and an opening to permit flow from its interior portion, first means to deliver a flow of entrained powder to the interior portion of the apparatus, second means to deliver a jet of air to the interior portion of the apparatus to effect a more uniform flow of powder from the opening of the apparatus, third means to permit a flow of atmosphere to be induced into the interior portion of the apparatus by the flow of powder and air through the opening, and to be added to the flow of powder and air from the opening means to form the flowing powder and air into a radially expanding spray and electrostatic means to charge the powder spray to effect its deposition on the article to be coated.
Claim 20
Dependent Claim
91 words
Means as set forth in claim 15, the interior portion of the powder spraying apparatus including a chamber joined with the opening to permit flow from the chamber to the opening, the first means delivering the flow of powder to the chamber, the second means delivering the jet of air to the chamber and directing it to effect a more uniform distribution of powder in the chamber, and the third means adjoining the chamber and adding the induced flow of atmosphere to the flow of powder and air from the chamber.
Claim 21
Dependent Claim
55 words
Means as set forth in claim 15 in which the means to form the flowing powder and air into a radially expanding spray includes a substantially flat, radially extending disk-like member and the flow of powder, air and atmosphere from the interior portion of the apparatus is directed across a disk-like surface of the member.
Claim 22
Dependent Claim
63 words
The means as set forth in claim 15 wherein the first means includes an orifice that directs the flow of powder into the interior portion of the apparatus but not toward the opening and the second means directs the jet of air into the interior portion of the apparatus with a velocity to move the entrained powder from the orifice toward the opening.
Claim 23
Dependent Claim
92 words
The means as set forth in claim 15 wherein the interior portion includes a chamber connected with the opening permitting flow from the chamber to the opening, the first means delivers the flow of powder to the chamber, the second means delivers the jet of air to the chamber and directs it to effect a more uniform distribution of powder in the chamber, and the third means is connected with the chamber and adds the induced flow of atmosphere to the flow of powder and air from the chamber to the opening.
Claim 24
Dependent Claim
55 words
The means as set forth in claim 15 wherein the interior portion defines an annular opening between the interior portion and the opening through which the powder and air flow, and the second means includes an orifice to direct the jet of air into the interior portion between the first means and the annular opening.
Claim 25
Dependent Claim
41 words
The means as set forth in claim 20 wherein the third means directs the induced flow of atmosphere toward the annular opening of the interior portion to combine with the flow of powder and air through annular opening to the opening.
Claim 26
Dependent Claim
25 words
The means as set forth in claim 20 wherein the third means includes a deflector opposite the annular opening with an aperture near its center.
Claim 27
Dependent Claim
34 words
The means as set forth in claim 20 wherein the annular opening is formed by a first deflector that is provided in the interior portion of the apparatus and located opposite the first means.
Claim 28
Dependent Claim
75 words
The means as set forth in claim 23 wherein the third means includes a second deflector opposite the annular opening with an aperture to permit passage of an induced flow of air, the first deflector being interposed between the first means and aperture, and the second means delivers the jet of air into the interior portion of the apparatus with a velocity component that is tangential to the flow entrained powder from the first means.
Claim 29
Dependent Claim
162 words
The means as set forth in claim 23 wherein the first means includes an orifice and directs the flow of entrained powder at the third means, the second means forms a chamber and includes a plurality of orifices to deliver a plurality of air jets into the chamber tangential to the flow of entrained powder from the orifice of the first means, the first deflector being located to intercept the flow of entrained powder from the orifice of the first means and the entrained powder being moved by the action of the plurality of jets through the annular opening in the direction of the opening, the third means includes a second deflector located opposite the annular opening and including a central aperture so that atmosphere is induced to flow through the aperture to be directed by the deflectors in the direction of annular opening and the opening and to be added to the flow of entrained powder and air from said opening.
Claim 30
Dependent Claim
52 words
The means as set forth in claim 15 wherein a deflector is provided in the interior portion of the apparatus opposite the first means to deliver a flow of entrained powder to the interior portion and the deflector cooperates with the second means to form an annular opening from the interior portion.
Claim 31
Dependent Claim
75 words
The means as set forth in claim 26 wherein the interior portion includes a chamber formed by the second means, the deflector and the third means, and the opening is formed by the third means and a radially extending disk-like surface that carries the electrostatic means to charge the powder spray, said opening, third means and radially extending disk-like surface forming the means to form the flow powder and air into a radially expanding spray.
Claim 32
Dependent Claim
32 words
The means as set forth in claim 27 wherein the third means is adjustably fixed to the appparatus so that the opening between deflector and the radially extending surface may be varied.
Claim 33
Dependent Claim
183 words
Means for coating an article with particles of powder comprising a non-rotating apparatus for providing a spray of powder, the apparatus having an interior portion and an opening to permit flow from its interior portion, first means to deliver a flow of entrained powder to the interior portion of the apparatus, second means to deliver a jet of air to the interior portion of the apparatus to effect a more uniform flow of powder from the opening of the apparatus, third means to permit a flow of atmosphere to be induced into the interior portion of the apparatus by the flow of powder and air through the opening, and to be added to the flow of powder and air from the opening in forming a powder spray from apparatus, a substantially flat, radially extending disk-like surface and the flow of powder, air and atmosphere from the interior portion of the apparatus is directed across the disk-like surface to be dispersed as a radially expanding spray, and electrostatic means to charge the powder spray to effect its deposition on the article to be coated.
Claim 34
Dependent Claim
183 words
Means for coating an article with particles of powder comprising a non-rotating apparatus for providing a spray of powder, the apparatus having an interior portion and an opening to permit flow from its interior portion, first means to deliver a flow of entrained powder to the interior portion of the apparatus, second means to deliver a jet of air to the interior portion of the apparatus to effect a more uniform flow of powder from the opening of the apparatus, third means to permit a flow of atmosphere to be induced into the interior portion of the apparatus by the flow of powder and air through the opening, and to be added to the flow of powder and air from the opening in forming a powder spray from apparatus, a substantially flat, radially extending disk-like surface and the flow of powder, air and atmosphere from the interior portion of the apparatus is directed across the disk-like surface to be dispersed as a radially expanding spray, and electrostatic means to charge the powder spray to effect its deposition on the article to be coated.
Claim 35
Dependent Claim
91 words
Means as set forth in claim 29, the interior portion of the powder spraying apparatus including a chamber joined with the opening to permit flow from the chamber to the opening, the first means delivering the flow of powder to the chamber, the second means delivering the jet of air to the chamber and directing it to effect a more uniform distribution of powder in the chamber, and the third means adjoining the chamber and adding the induced flow of atmosphere to the flow of powder and air from the chamber.
Claim 36
Dependent Claim
23 words
The means as set forth in claim 17 wherein the radially extending disk-like member carries the electrostatic means to charge the powder spray.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |