US3735925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and device for electrostatic spraying of material
Assignee: Individual
•
Filing: 1971-07-23
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Granted: 1973-05-29
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Expires: 1991-07-23
Abstract
Abstract A method and apparatus for electrostatically charging material to be sprayed onto a surface, by pressing the material to be sprayed between two electrodes of a condenser positioned in a spaced-apart relationship and insulated from each other by a dielectric. One of the electrodes is connected to a high-voltage, low-amperage power supply and the other electrode is grounded to create a uniform electrical field through which the material to be sprayed is passed for achieving a strong, uniform electrostatic charging of all the material to be sprayed while requiring less voltage and current for operation than the prior art devices and methods.
Inventors
- 👤 G Benedek
- 👤 A Buday
- 👤 A Bese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:57
CPC Classifications
B; B05; B05B; B05B5/00; B05B5/025; B05B5/03
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
144 words
A device for electrostatically charging and spraying material on an object having an opposite electrical charge comprising a spraying head, a supply duct for supplying the material to be sprayed to the spraying head, an electrode connected to a high voltage source for obtaining an electrical charge from said high voltage source, the electrical charge of said electrode being opposite the charge of the object being sprayed, said electrode which is oppositely charged with respect to the object to be sprayed being positioned opposite a counter-electrode at a small spaced-apart interval therebetween, wherein one of said electrode or counter-electrode is covered with a dielectric, the dielectric facing toward the opposite electrode and wherein said electrode and counter-electrode form a condenser through which the sprinkling material is conducted, said condenser being positioned in front of the spraying head inside the supply duct for the material.
Claim 2
Independent Claim
144 words
A device for electrostatically charging and spraying material on an object having an opposite electrical charge comprising a spraying head, a supply duct for supplying the material to be sprayed to the spraying head, an electrode connected to a high voltage source for obtaining an electrical charge from said high voltage source, the electrical charge of said electrode being opposite the charge of the object being sprayed, said electrode which is oppositely charged with respect to the object to be sprayed being positioned opposite a counter-electrode at a small spaced-apart interval therebetween, wherein one of said electrode or counter-electrode is covered with a dielectric, the dielectric facing toward the opposite electrode and wherein said electrode and counter-electrode form a condenser through which the sprinkling material is conducted, said condenser being positioned in front of the spraying head inside the supply duct for the material.
Claim 3
Dependent Claim
57 words
A device according to claim 1, wherein the electrode connected to the high-voltage source and which is oppositely charged by this source with respect to the object to be sprayed, is positioned a greater distance from the exit end of the supply duct on the sprinkler head than the counter-electrode of the condenser which is opposite it.
Claim 4
Dependent Claim
51 words
A device according to claim 1 wherein said electrode and counter-electrode of the condenser are comprised of pipes positioned concentrically, one inside the other, the supply duct for the material to be sprayed being formed by the space between said two pipes, said two pipes being further separated by a dielectric.
Claim 5
Dependent Claim
29 words
A device according to claim 3, wherein the supply duct for the material to be sprayed is formed cylindrically between the two pipe electrodes arranged concentrically inside each other.
Claim 6
Dependent Claim
29 words
A device according to claim 3, wherein the supply duct for the material to be sprayed is formed spirally between the two pipe electrodes arranged concentrically inside each other.
Claim 7
Dependent Claim
44 words
A device according to claim 5, wherein said supply duct for the material to be sprayed formed spirally between the two pipe electrodes arranged concentrically inside each other, consist of a groove which is spirally formed in the dielectric between said two pipe electrodes.
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) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |