US3814322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mist coating of strip material
Assignee: Veolia WTS USA Inc
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Filing: 1973-07-12
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Granted: 1974-06-04
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Expires: 1993-07-12
Abstract
Abstract Apparatus for spraying an aerosol mist of a liquid onto a moving strip to coat the strip and prepare it for subsequent painting. The apparatus comprises a spray chamber in which a pair of rotating spray heads are disposed and through which the strip passes between the spray heads. The spray heads each include plural nozzles which rotate under the jet action of the exhausting aerosol to provide a fine aerosol mist which uniformly coats the moving strip. No liquid tight seals are used in the spray heads and the liquid for the aerosol is directed without leakage to the spray nozzles by centrifugal force. Exhaust means are provided to maintain a slight vacuum within the chamber and to preclude the egress of the coating liquid or vapor therefrom. A liquid bath filter is provided to filter the exhausted atmosphere from the chamber and a surface filter is provided to filter the atmosphere from the liquid bath and to release it to the ambient atmosphere.
Inventors
- 👤 J Waldrum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:42
CPC Classifications
B; B05; B05B; B05B7/00; B05B7/0012; B05B13/00; B05B13/02; B05B13/04; B05B13/0463; B05B13/0484; B05B14/00; B05B14/40; B05B14/43; B05B14/46; B05B16/00; B05B16/90; B05D; B05D1/00; B05D1/02; B05D2202/00; B05D2252/00; B05D2252/10; Y; Y02; Y02P; Y02P70/00; Y02P70/10; Y10; Y10S; Y10S55/00; Y10S55/46
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
115 words
Apparatus for spraying an aerosol mist of a liquid onto a moving strip to coat the strip, comprising a spray chamber through which said strip passes, a rotating spray head disposed within said chamber and comprising plural nozzles for producing an aerosol from a liquid and a gas provided from separate means and for directing said aerosol to said strip, vacuum means for drawing the atmosphere out of said chamber to thereby create a slight vacuum within the chamber with respect to the ambient atmosphere to preclude the direct egress of the aerosol to the ambient atmosphere and filter means for removing residual liquid and vapor from the atmosphere which is withdrawn from the chamber.
Claim 2
Dependent Claim
115 words
Apparatus for spraying an aerosol mist of a liquid onto a moving strip to coat the strip, comprising a spray chamber through which said strip passes, a rotating spray head disposed within said chamber and comprising plural nozzles for producing an aerosol from a liquid and a gas provided from separate means and for directing said aerosol to said strip, vacuum means for drawing the atmosphere out of said chamber to thereby create a slight vacuum within the chamber with respect to the ambient atmosphere to preclude the direct egress of the aerosol to the ambient atmosphere and filter means for removing residual liquid and vapor from the atmosphere which is withdrawn from the chamber.
Claim 3
Dependent Claim
58 words
The apparatus of claim 1 wherein said spray head rotates about an axis and wherein said nozzles are directed at an acute angle to the plane of said strip with a directional component thereof tangential to said axis in order to cause said spray head to rotate thereabout by the reaction of the aerosol exiting from the nozzles.
Claim 4
Dependent Claim
57 words
The apparatus of claim 2 wherein the liquid and gas supplies are stationary and wherein the spray head produces a centrifugal force on the liquid provided to it during its rotation and including means operative in conjunction with said centrifugal force to direct the liquid to the nozzles without leakage and without any liquid sealing means therebetween.
Claim 5
Dependent Claim
61 words
The apparatus of claim 3 wherein said last mentioned means comprises a liquid-receiving chamber having a wall including a tapered bore through which said axis extends longitudinally and a liquid inlet port, said chamber wall having at least one outlet port extending radially outward therethrough adjacent to the large end of the bore, said outlet port being connected to a nozzle.
Claim 6
Dependent Claim
55 words
The apparatus of claim 4 wherein said spray head includes a gas-receiving chamber having a wall forming a cylindrical bore and separated from the liquid-receiving chamber by a barrier wall, said bas-receiving chamber including at least one outlet port extending radially outward through the wall thereof, said outlet port being connected to a respective nozzle.
Claim 7
Dependent Claim
58 words
The apparatus of claim 5 wherein a tubular shaft extends through the axis of the spray head and through the barrier wall to communicate with the interior of said gas-receiving chamber, said shaft serving as the means about which the spray head rotates and the means for providing the gas from the gas supply to the gas-receiving chamber.
Claim 8
Dependent Claim
52 words
The apparatus of claim 6 wherein a shell having at least one orifice therein, is disposed about the shaft and within the liquid-receiving chamber, with said orifice communicating with the interior of said liquid-receiving chamber, said shell serving as the means for providing liquid from said liquid supply into said liquid-receiving chamber.
Claim 9
Dependent Claim
29 words
The apparatus of claim 3 whereIn said liquid supply means comprises a constant head device for providing a constant volume of liquid to said spray head during rotation thereof.
Claim 10
Dependent Claim
23 words
The apparatus of claim 8 wherein said constant head device is adjustable to vary the volume of liquid provided to the spray head.
Claim 11
Dependent Claim
30 words
The apparatus of claim 3 wherein said filter means comprises a liquid bath through which the atmosphere from the spray chamber is bubbled to extract liquid droplets and vapor therefrom.
Claim 12
Dependent Claim
55 words
The apparatus of claim 10 wherein said filter means also comprises a surface filter coupled to the outlet of said liquid bath and having a large condensing surface area over which the atmosphere exiting from the liquid bath passes to remove residual liquid droplets and vapor therefrom, said surface filter venting to the ambient atmosphere.
Claim 13
Dependent Claim
26 words
The apparatus of claim 10 wherein a substantial portion of the atmosphere exiting from the liquid bath is fed directly back to the gas supply means.
Claim 14
Dependent Claim
138 words
A spray head for producing an aerosol spray from a liquid and a gas provided from associated stationary supplies, said spray head being rotatable about an axis normal to the plane of said spray head and including a plurality of nozzles spaced radially from the axis of said spray head and directed at an acute angle to the plane of said spray head with a directional component thereof tangential to said axis in order to cause said spray head to rotate about said axis by the reaction of the aerosol exiting said nozzles, the rotation of said spray head producing a centrifugal force on the liquid provided to it by said liquid supply and including means operative in conjunction with said centrifugal force to direct the liquid to said nozzles without leakage and without any liquid sealing means.
Claim 15
Dependent Claim
138 words
A spray head for producing an aerosol spray from a liquid and a gas provided from associated stationary supplies, said spray head being rotatable about an axis normal to the plane of said spray head and including a plurality of nozzles spaced radially from the axis of said spray head and directed at an acute angle to the plane of said spray head with a directional component thereof tangential to said axis in order to cause said spray head to rotate about said axis by the reaction of the aerosol exiting said nozzles, the rotation of said spray head producing a centrifugal force on the liquid provided to it by said liquid supply and including means operative in conjunction with said centrifugal force to direct the liquid to said nozzles without leakage and without any liquid sealing means.
Claim 16
Dependent Claim
61 words
The spray head of claim 13 wherein said last mentioned means comprises a liquid-receiving chamber having a wall forming a tapered bore through which said axis extends longitudinally and a liquid inlet, said chamber wall having at least one outlet port extending radially outward therethrough adjacent to the large end of the bore, said outlet port being connected to a nozzle.
Claim 17
Dependent Claim
54 words
The spray head of claim 14 additionally comprising a gas-receiving chamber having a wall forming a cylindrical bore and separated from the liquid-receiving chamber by a barrier wall, said gas-receiving chamber including at least one outlet port extending radially outward through the wall of the bore, said outlet port being connected to a nozzle.
Claim 18
Dependent Claim
55 words
The spray head of claim 15 wherein a tubular shaft extends along the axis of the spray head and through the barrier wall to communicate with the interior of the gas-receiving chamber, said shaft serving as the means about which the spray head rotates and the means for providing the gas to the gas-receiving chamber.
Claim 19
Dependent Claim
48 words
The apparatus of claim 16 wherein a shell having an orifice therein is disposed about the shaft and within the liquid-receiving chamber, with said orifice communicating with the interior of said liquid-receiving chamber, said tubular member serving as the means for providing the liquid into the liquid-receiving chamber.
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US2294168A
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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) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |