Patent US3747852A successfully refreshed from Google Patents.
US3747852A
Expired / Lapsed
US
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Paint spraying method
Assignee: Nordson Corp
•
Filing: 1971-09-02
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Granted: 1973-07-24
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Expires: 1991-09-02
Abstract
Abstract A method and apparatus for spraying paint and similar coatings. In one form the paint is sprayed at low pressure from a flat fan nozzle. A flat fan of air impinges upon the fan of paint at an angle of from 30*-70*. The air atomizes the paint to form a soft spray with low forward velocity. In another form of the method, two fans of paint are projected toward one another at an angle and an air fan is directed along the bisector toward the zone of intersection. The air fan atomizes both streams of paint. An electrode can be placed in the air stream to ionize the air stream which in turn charges the paint particles. The width of the paint spray pattern is varied by varying the included angle of the air fan. A spray gun is disclosed having two tubular paint nozzles for projecting two fan-shaped fans of paint. An air nozzle is mounted between the paint nozzles for projecting a fan of air against the paint fans to atomize the paint. The air nozzle is adjustable to provide air fans of different angles for varying the width of the paint spray pattern. An electrode is disposed in the air nozzle for ionizing the air stream. This electrode is energized through a resistor and flexible cable. The cable is spring-urged toward the resistor so that when the resistor is removed, the cable shifts causing a safety switch to open deenergizing the gun. When a nozzle mounting member is removed, the cable and surrounding tube are shifted forwardly to automatically close a valve to seal off the air and electrical conduits. Removable caps are provided on the ends of the tubular paint nozzles for facilitating cleaning of the nozzles.
Inventors
- 👤 D Scarbrough
- 👤 B Vilagi
- 👤 E Nord
- 👤 S Rosen
- 👤 P Runstadler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:03
CPC Classifications
B; B05; B05B; B05B7/00; B05B7/02; B05B7/08; B05B7/0807; B05B7/0815; B05B1/00; B05B1/02; B05B1/04; B05B1/042; B05B5/00; B05B5/025; B05B5/03; B05B5/035
Claims Analysis
Total Claims: 50
Claim 1
Independent Claim
88 words
The method of spraying paint which comprises the steps of: projecting a flat fan of paint, projecting a fan of air, causing the fan of air to impinge upon the fan of paint at a substantial angle of from approximately 30* to approximately 70*, the fan of air being at least as wide at the zone of airpaint impingement as the fan of paint, whereby the air fan is effective to atomize the paint to form a spray, and projecting said spray against a workpiece to be coated.
Claim 2
Independent Claim
88 words
The method of spraying paint which comprises the steps of: projecting a flat fan of paint, projecting a fan of air, causing the fan of air to impinge upon the fan of paint at a substantial angle of from approximately 30* to approximately 70*, the fan of air being at least as wide at the zone of airpaint impingement as the fan of paint, whereby the air fan is effective to atomize the paint to form a spray, and projecting said spray against a workpiece to be coated.
Claim 3
Dependent Claim
63 words
The method of claim 1 in which the air is projected from an air nozzle and the paint is projected from a paint nozzle, and the length of air travel from the air nozzle to the zone of paint - air impingement is from approximately one-sixth to three-fourths the length of paint travel from the paint nozzle to the zone of air-paint impingement.
Claim 4
Dependent Claim
67 words
The method of claim 1 in which air is projected from an air nozzle and paint is projected from a paint nozzle and the length of air flow from the nozzle to the zone of air-paint impingement is from approximately one-eighth inch to three-eighths inch and the length of paint travel from the paint nozzle to the zone of air-paint impingement is approximately three-eighths to three-fourths inches.
Claim 5
Dependent Claim
48 words
The method of claim 1 in which the air flows in a ratio of from approximately 0.2 standard cubic feet of air per minute per fluid ounce of paint per minute to approximately 0.6 standard cubic feet of air per minute per fluid ounce of paint per minute.
Claim 6
Dependent Claim
24 words
The method of claim 1 in which the air pressure is from approximately 9 pounds to 45 pounds per square inch at the gun.
Claim 7
Dependent Claim
20 words
The method of claim 5 in which the paint pressure is approximately from 30 to 80 pounds per square inch.
Claim 8
Dependent Claim
24 words
The method of claim 4 in which the air pressure is from approximately 9 pounds to 45 pounds per square inch at the gun.
Claim 9
Dependent Claim
20 words
The method of claim 7 in which the paint pressure is approximately from 30 to 80 pounds per square inch.
Claim 10
Dependent Claim
31 words
The method of claim 1 in which the fan of paint is in the form of a continuous sheet having a thin center web and thickened streamer portions along both edges.
Claim 11
Dependent Claim
41 words
The method of claim 9 in which the fan of air is non-uniform and has mass higher flow rates in the areas of impingement upon the streamer portions than in the area impinging upon the center web of the paint fan.
Claim 12
Dependent Claim
48 words
The method of claim 10 in which the air flows in a ratio of from approximately 0.2 standard cubic feet of air per minute per fluid ounce of paint per minute to approximately 0.6 standard cubic feet of air per minute per fluid ounce of paint per minute.
Claim 13
Dependent Claim
38 words
The method of claim 10 in which the air pressure is from approximately 9 pounds to 45 pounds per square inch at the gun and the paint pressure is approximately from 30 to 80 pounds per square inch.
Claim 14
Dependent Claim
67 words
The method of claim 12 in which air is projected from an air nozzle and paint is projected from a paint nozzle and the length of air flow from the nozzle to the zone of air-paint impingement is from approximately one-eighth inch to three-eighths inch and the length of paint travel from the paint nozzle to the zone of air-paint impingement is approximately three-eighths to three-fourths inches.
Claim 15
Independent Claim
116 words
The method of spraying paint which comprises the steps of projecting a flat fan of air; projecting two flat fans of paint, fans of paint being projected toward the fan of air from opposite sides thereof and impinging the fan of air in substantially the same area, each of the fans of paint impinging upon the fan of air at a substantial angle of from approximately 30* to approximately 70*, the fan of air being at least as wide at the zone of air-paint impingement as the fans of paint, whereby the air fan is effective to atomize both fans of paint to form a spray and, projecting said spray against a workpiece to be coated.
Claim 16
Independent Claim
116 words
The method of spraying paint which comprises the steps of projecting a flat fan of air; projecting two flat fans of paint, fans of paint being projected toward the fan of air from opposite sides thereof and impinging the fan of air in substantially the same area, each of the fans of paint impinging upon the fan of air at a substantial angle of from approximately 30* to approximately 70*, the fan of air being at least as wide at the zone of air-paint impingement as the fans of paint, whereby the air fan is effective to atomize both fans of paint to form a spray and, projecting said spray against a workpiece to be coated.
Claim 17
Dependent Claim
62 words
The method of claim 14 in which air is projected from an air nozzle and each fan of paint is projected from a paint nozzle, and the length of air travel from the air nozzle to the zone of paint-air impingement is from approximately one-sixth to three-fourths the length of paint travel from the paint nozzle to the zone of air-paint impingement.
Claim 18
Dependent Claim
70 words
The method of claim 14 in which air is projected from an air nozzle and each fan of paint is projected from a paint nozzle and the length of air flow from the nozzle to the zone of air-paint impingement is from approximately one-eighth inch to three-eighths inch and the length of paint travel from the paint nozzle to the zone of air-paint impingement is approximately three-eighths to three-fourths inches.
Claim 19
Dependent Claim
48 words
The method of claim 14 in which the air flows in a ratio of from approximately 0.2 standard cubic feet of air per minute per fluid ounce of paint per minute to approximately 0.6 standard cubic feet of air per minute per fluid ounce of paint per minute.
Claim 20
Dependent Claim
38 words
The method of claim 17 in which the air pressure is from approximately 9 pounds to 45 pounds per square inch at the gun and the paint pressure is approximately from 30 to 80 pounds per square inch.
Claim 21
Dependent Claim
38 words
The method of claim 14 in which the air pressure is from approximately 9 pounds to 45 pounds per square inch at the gun and the paint pressure is approximately from 30 to 80 pounds per square inch.
Claim 22
Dependent Claim
31 words
The method of claim 14 in which each fan of paint is in the form of a continuous sheet having a thin center web and thickened streamer portions along both edges.
Claim 23
Dependent Claim
41 words
The method of claim 20 in which the fan of air is non-uniform and has mass higher flow rates in the areas of impingement upon the streamer portions than in the area impinging upon the center web of the paint fans.
Claim 24
Dependent Claim
48 words
The method of claim 21 in which the air flows in a ratio of from approximately 0.2 standard cubic feet of air per minute per fluid ounce of paint per minute to approximately 0.6 standard cubic feet of air per minute per fluid ounce of paint per minute.
Claim 25
Dependent Claim
38 words
The method of claim 21 in which the air pressure is from approximately 9 pounds to 45 pounds per square inch at the gun and the paint pressure is approximately from 30 to 80 pounds per square inch.
Claim 26
Dependent Claim
70 words
The method of claim 23 in which air is projected from an air nozzle and each fan of paint is projected from a paint nozzle and the length of air flow from the nozzle to the zone of air-paint impingement is from approximately one-eighth inch to three-eighths inch and the length of paint travel from the paint nozzle to the zone of air-paint impiNgement is approximately three-eighths to three-fourths inches.
Claim 27
Independent Claim
132 words
The method of simultaneously mixing and spraying paint which comprises the step of projecting a flat fan of air, projecting two flat fans of paint, each of said flat fans of paint being of a different color, the fans of paint being projected toward the fan of air from opposite sides thereof and impinging the fan of air in substantially the same area, each of the fans of paint impinging upon the fan of air at a substantial angle of from approximately 30* to approximately 70*, the fan of air being at least as wide at the zone of air-paint impingement as the fans of paint, whereby the air fan is effective to atomize both fans of paint to form a spray and, projecting said spray against a workpiece to be coated.
Claim 28
Independent Claim
132 words
The method of simultaneously mixing and spraying paint which comprises the step of projecting a flat fan of air, projecting two flat fans of paint, each of said flat fans of paint being of a different color, the fans of paint being projected toward the fan of air from opposite sides thereof and impinging the fan of air in substantially the same area, each of the fans of paint impinging upon the fan of air at a substantial angle of from approximately 30* to approximately 70*, the fan of air being at least as wide at the zone of air-paint impingement as the fans of paint, whereby the air fan is effective to atomize both fans of paint to form a spray and, projecting said spray against a workpiece to be coated.
Claim 29
Independent Claim
126 words
The method of spraying paint which comprises the steps of: projecting a flat fan of paint from a paint nozzle, projecting a fan of air from an air nozzle, causing the fan of air to impinge upon the fan of paint at a substantial angle, the fan of air being at least as wide at the zone of air-paint impingement as the fan of paint, and the length of air travel from the air nozzle to the zone of paint-air impingement is from approximately one-sixth to three-fourths the length of paint travel from the paint nozzle to the zone of air-paint impingement, whereby the air fan is effective to atomize the paint to form a spray, and projecting said spray against a workpiece to be coated.
Claim 30
Independent Claim
126 words
The method of spraying paint which comprises the steps of: projecting a flat fan of paint from a paint nozzle, projecting a fan of air from an air nozzle, causing the fan of air to impinge upon the fan of paint at a substantial angle, the fan of air being at least as wide at the zone of air-paint impingement as the fan of paint, and the length of air travel from the air nozzle to the zone of paint-air impingement is from approximately one-sixth to three-fourths the length of paint travel from the paint nozzle to the zone of air-paint impingement, whereby the air fan is effective to atomize the paint to form a spray, and projecting said spray against a workpiece to be coated.
Claim 31
Independent Claim
134 words
The method of spraying paint which comprises the steps of: projecting a flat fan of paint from a paint nozzle, projecting a fan of air from an air nozzle, causing the fan of air to impinge upon the fan of paint at a substantial angle, the fan of air being at least as wide at the zone of air-paint impingement as the fan of paint, and the length of air flow from the nozzle to the zone of air-paint impingement is from approximately one-eighth inch to three-eighths inch and the length of paint travel from the paint nozzle to the zone of air-paint impingement is approximately three-eighths to three-fourths inches, whereby the air fan is effective to atomize the paint to form a spray, and projecting said spray against a workpiece to be coated.
Claim 32
Independent Claim
134 words
The method of spraying paint which comprises the steps of: projecting a flat fan of paint from a paint nozzle, projecting a fan of air from an air nozzle, causing the fan of air to impinge upon the fan of paint at a substantial angle, the fan of air being at least as wide at the zone of air-paint impingement as the fan of paint, and the length of air flow from the nozzle to the zone of air-paint impingement is from approximately one-eighth inch to three-eighths inch and the length of paint travel from the paint nozzle to the zone of air-paint impingement is approximately three-eighths to three-fourths inches, whereby the air fan is effective to atomize the paint to form a spray, and projecting said spray against a workpiece to be coated.
Claim 33
Independent Claim
131 words
The method of spraying paint which comprises the steps of: projecting a flat fan of paint from a paint nozzle, projecting a fan of air from an air nozzle, causing the fan of air to impinge upon the fan of paint at a substantial angle, the fan of air being at least as wide at the zone of air-paint impingement as the fan of paint, and the air flows in a ratio of from approximately 0.2 standard cubic feet of air per minute per fluid ounce of paint per minute to approximately 0.6 standard cubic feet of air per minute per fluid ounce of paint per minute, whereby the air fan is effective to atomize the paint to form a spray, and projecting said spray against a workpiece to be coated.
Claim 34
Independent Claim
131 words
The method of spraying paint which comprises the steps of: projecting a flat fan of paint from a paint nozzle, projecting a fan of air from an air nozzle, causing the fan of air to impinge upon the fan of paint at a substantial angle, the fan of air being at least as wide at the zone of air-paint impingement as the fan of paint, and the air flows in a ratio of from approximately 0.2 standard cubic feet of air per minute per fluid ounce of paint per minute to approximately 0.6 standard cubic feet of air per minute per fluid ounce of paint per minute, whereby the air fan is effective to atomize the paint to form a spray, and projecting said spray against a workpiece to be coated.
Claim 35
Independent Claim
107 words
The method of spraying paint which comprises the steps of: projecting a flat fan of paint from a paint nozzle, projecting a fan of air from an air nozzle, causing the fan of air to impinge upon the fan of paint at a substantial angle, the fan of air being at least as wide at the zone of air-paint impingement as the fan of paint, and the air pressure is from approximately 9 pounds to 45 pounds per square inch at the gun, whereby the air fan is effective to atomize the paint to form a spray, and projecting said spray against a workpiece to be coated.
Claim 36
Independent Claim
107 words
The method of spraying paint which comprises the steps of: projecting a flat fan of paint from a paint nozzle, projecting a fan of air from an air nozzle, causing the fan of air to impinge upon the fan of paint at a substantial angle, the fan of air being at least as wide at the zone of air-paint impingement as the fan of paint, and the air pressure is from approximately 9 pounds to 45 pounds per square inch at the gun, whereby the air fan is effective to atomize the paint to form a spray, and projecting said spray against a workpiece to be coated.
Claim 37
Independent Claim
105 words
The method of varying the size of a paint spray pattern which comprises, the steps of projecting a flat fan of paint, projecting a fan of air from an air nozzle, causing the fan of air to impinge upon the fan of paint at a substantial angle, the fan of air being at least as wide at the zone of air-paint impingement as the fan of paint, whereby the air fan is effective to atomize The paint to form a spray pattern and, selectively increasing or decreasing the included angle of the air fan to increase or decrease the width of the paint spray pattern.
Claim 38
Independent Claim
105 words
The method of varying the size of a paint spray pattern which comprises, the steps of projecting a flat fan of paint, projecting a fan of air from an air nozzle, causing the fan of air to impinge upon the fan of paint at a substantial angle, the fan of air being at least as wide at the zone of air-paint impingement as the fan of paint, whereby the air fan is effective to atomize The paint to form a spray pattern and, selectively increasing or decreasing the included angle of the air fan to increase or decrease the width of the paint spray pattern.
Claim 39
Dependent Claim
65 words
The method of claim 30 in which the fan of air flows as though it emanates from a point pressure source and the point pressure source is shifted away from the zone of impingement of the air-paint when the included angle of the air fan is decreased, whereby the width of the air fan at the zone of impingement with the air-paint remains substantially consistent.
Claim 40
Independent Claim
136 words
The method of spraying paint which comprises the steps of projecting a flat fan of air from an air nozzle, projecting two flat fans of paint from two paint nozzles, the fans of paint being projected toward the fan of air from opposite sides thereof and impinging the fan of air in substantially the same area, each of the fans of paint impinging upon the fan of air at a substantial angle, the fan of air being at least as wide at the zone of air-paint impingement as the fans of paint, whereby the air fan is effective to atomize both fans of paint to form a spray and, the air pressure is from approximately 9 pounds to 45 pounds per square inch at the gun, and projecting said spray against a workpiece to be coated.
Claim 41
Independent Claim
136 words
The method of spraying paint which comprises the steps of projecting a flat fan of air from an air nozzle, projecting two flat fans of paint from two paint nozzles, the fans of paint being projected toward the fan of air from opposite sides thereof and impinging the fan of air in substantially the same area, each of the fans of paint impinging upon the fan of air at a substantial angle, the fan of air being at least as wide at the zone of air-paint impingement as the fans of paint, whereby the air fan is effective to atomize both fans of paint to form a spray and, the air pressure is from approximately 9 pounds to 45 pounds per square inch at the gun, and projecting said spray against a workpiece to be coated.
Claim 42
Independent Claim
111 words
The method of spraying paint which comprises the steps of: projecting a flat fan of paint, said fan of paint being in the form of a continuous sheet having a thin center web and thickened streamer portions along both edges, projecting a fan of air, causing the fan of air to impinge upon the fan of paint at a substantial angle, while said fan is substantially planar, the fan of air being at least as wide at the zone of air-paint impingement as the fan of paint, whereby the air fan is effective to atomize the paint to form a spray, and projecting said spray against a workpiece to be coated.
Claim 43
Independent Claim
111 words
The method of spraying paint which comprises the steps of: projecting a flat fan of paint, said fan of paint being in the form of a continuous sheet having a thin center web and thickened streamer portions along both edges, projecting a fan of air, causing the fan of air to impinge upon the fan of paint at a substantial angle, while said fan is substantially planar, the fan of air being at least as wide at the zone of air-paint impingement as the fan of paint, whereby the air fan is effective to atomize the paint to form a spray, and projecting said spray against a workpiece to be coated.
Claim 44
Independent Claim
142 words
The method of spraying paint which comprises the steps of projecting a flat fan of air from an air nozzle, projecting two flat fans of paint from two paint nozzles, the fans of paint being projected toward the fan of air from opposite sides thereof and impinging the fan of air in substantially the same area, each of the fans of paint impinging upon the fan of air at a substantial angle, the fan of air being at least as wide at the zone of air-paint impingement as the fans of paint, whereby the air fan is effective to atomize both fans of paint to form a spray, each fan of paint being in the form of a continuous sheet having a thin center web and thickened streamer portions along both edges, and projecting said spray against a workpiece to be coated.
Claim 45
Independent Claim
142 words
The method of spraying paint which comprises the steps of projecting a flat fan of air from an air nozzle, projecting two flat fans of paint from two paint nozzles, the fans of paint being projected toward the fan of air from opposite sides thereof and impinging the fan of air in substantially the same area, each of the fans of paint impinging upon the fan of air at a substantial angle, the fan of air being at least as wide at the zone of air-paint impingement as the fans of paint, whereby the air fan is effective to atomize both fans of paint to form a spray, each fan of paint being in the form of a continuous sheet having a thin center web and thickened streamer portions along both edges, and projecting said spray against a workpiece to be coated.
Claim 46
Independent Claim
175 words
The method of spraying paint which comprises the steps of projecting a flat fan of air from an air nozzle, projecting two flat fans of paint from two paint nozzles, each fan of paint being in the form of a continuous sheet having a thin center web and thickened streamer portions along both edges, the fans of paint being projected toward the fan of air from opposite sides thereof and impinging the fan of air in substantially the same area, each of the fans of paint impinging upon the fan of air at a substantial angle, the fan of air being at least as wide at the zone of air-paint impingement as the fans of paint, whereby the air fan is effective to atomize both fans of paint to form a spray, the fan of air being non-uniform and having higher flow rates in the areas of impingement upon the streamer portions than in the area impinging upon the center web of the paint fans, and projecting said spray against a workpiece to be coated.
Claim 47
Independent Claim
175 words
The method of spraying paint which comprises the steps of projecting a flat fan of air from an air nozzle, projecting two flat fans of paint from two paint nozzles, each fan of paint being in the form of a continuous sheet having a thin center web and thickened streamer portions along both edges, the fans of paint being projected toward the fan of air from opposite sides thereof and impinging the fan of air in substantially the same area, each of the fans of paint impinging upon the fan of air at a substantial angle, the fan of air being at least as wide at the zone of air-paint impingement as the fans of paint, whereby the air fan is effective to atomize both fans of paint to form a spray, the fan of air being non-uniform and having higher flow rates in the areas of impingement upon the streamer portions than in the area impinging upon the center web of the paint fans, and projecting said spray against a workpiece to be coated.
Claim 48
Independent Claim
160 words
The method of spraying paint which comprises the steps of projecting a flat fan of air from an air nozzle, projecting two flat fans of paint from two paint nozzles, the fans of paint being projected toward the fan of air from the opposite sides thereof and impinging the fan of air in substantially the saMe area, each of the fans of paint impinging upon the fan of air at a substantial angle, the fan of air being at least as wide at the zone of air-paint impingement as the fans of paint, whereby the air fan is effective to atomize both fans of paint to form a spray, the air flowing in a ratio of from approximately 0.2 standard cubic feet of air per minute per fluid ounce of paint per minute to approximately 0.6 standard cubic feet of air per minute per fluid ounce of paint per minute, and projecting said spray against a workpiece to be coated.
Claim 49
Independent Claim
160 words
The method of spraying paint which comprises the steps of projecting a flat fan of air from an air nozzle, projecting two flat fans of paint from two paint nozzles, the fans of paint being projected toward the fan of air from the opposite sides thereof and impinging the fan of air in substantially the saMe area, each of the fans of paint impinging upon the fan of air at a substantial angle, the fan of air being at least as wide at the zone of air-paint impingement as the fans of paint, whereby the air fan is effective to atomize both fans of paint to form a spray, the air flowing in a ratio of from approximately 0.2 standard cubic feet of air per minute per fluid ounce of paint per minute to approximately 0.6 standard cubic feet of air per minute per fluid ounce of paint per minute, and projecting said spray against a workpiece to be coated.
Claim 50
Dependent Claim
20 words
The method of claim 33 in which the paint pressure is from approximately 30 to 80 pounds per square inch.
References Cited (Backward Citations)
US1881345A
Cited
US3606154A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |