Fluid sprinkling – spraying – and diffusing – Electrostatic type – With automatic safety feature
Patent
1990-10-09
1991-10-22
Kashnikow, Andres
Fluid sprinkling, spraying, and diffusing
Electrostatic type
With automatic safety feature
2396901, 239703, 239706, 118629, B05B 504
Patent
active
050588125
DESCRIPTION:
BRIEF SUMMARY
This invention relates to electrostatically aided atomization and dispensing systems for coating materials and more particularly to systems Which are able to dispense both electrically more conductive coating materials such as metallic and water-based coating materials, and electrically less conductive Coating materials such as organic solvent-based coating materials.
In many modern coating material application facilities, different types of coating materials are required to be dispensed. For example, many of the coating materials used to coat automotive vehicle bodies are electrically highly conductive, while others are substantially less conductive. Examples of highly conductive coating materials for such applications include metallic coating materials and water-based coating materials. An example of a substantially less conductive coating material for such applications is a non-metallic organic solvent-based coating material
It is common in industries such as the automotive industry to use electrostatically aided atomization and dispensing processes in the application of coating materials. These processes are noted for their transfer efficiencies and resulting reduced usage requirements of coating materials. However, a problem exists when electrostatically aided atomization and dispensing processes are used to dispense highly conductive coating materials. That problem is isolation of the electrostatic high potential source from ground. It has been addressed frequently in the prior art, as demonstrated by the following references U.S. Pat. Nos. 1,655 262; 2 673 232; 3,098,890; 3,291,889 3,360,035; 4,020,866; 3,122,320; 3,893,620; 3,933,285; 3,934,055; 4,017,029; 4,275,834; 4,313,475; 4,085,892; 4,413,788; British Patent Specification 1,478,853 and British Patent Specification 1,393,333. This listing and other prior art listings herein are not intended to be exhaustive, or to be interpreted as representations that no better prior art exists.
Because of the large capital and floor space requirements of coating material application lines for facilities such as automotive vehicle assembly plants, it is generally undesirable to provide separate lines for applying highly conductive and generally non-conductive coating materials. In addition, each different conductive coating material practically requires a separate Coating material dispensing system. This further complicates the application of conductive coating materials.
Accordingly it is an object of the present invention to propose a coating material dispensing system which has the flexibility to dispense both the more highly conductive types of coating materials as well as those less conductive types.
A coating material dispensing facility according to the present invention includes a coating material dispensing device and an electrode electrically substantially isolated from the coating material dispensing device. Illustratively the electrode is of the type described in PCT/US88/02107 filed June 13, 1988 titled SPRAY COATING DEVICE FOR ELECTRICALLY CONDUCTIVE COATING LIQUIDS and assigned to the same assignee as this application The facility also includes a source of first and second coating materials, the first coating material being electrically substantially more conductive and the second being electrically substantially less conductive. First means are provided for alternately supplying either the first coating material or the second to the coating material dispensing device. Electrostatic high potential is provided, as is second means for coupling the electrostatic high potential to the electrode and the dispensing device. The second means selectively couples the electrostatic high potential to the coating material dispensing device only when the first means supplies the second coating material to the dispensing device.
The invention may best be understood by referring to the following description and accompanying drawings which illustrate the invention. In the drawings:
FIG. 1 illustrates a highly diagrammatic side elevational view of a system const
REFERENCES:
patent: 1655262 (1928-01-01), Fortin
patent: 2673232 (1954-03-01), Silsby, Jr.
patent: 3098890 (1963-07-01), Peterson
patent: 3122320 (1964-02-01), Beck et al.
patent: 3291889 (1966-12-01), Uline et al.
patent: 3360035 (1967-12-01), Van Loo et al.
patent: 3892357 (1975-07-01), Tamny
patent: 3893620 (1975-09-01), Rokadia
patent: 3933285 (1976-01-01), Wiggins
patent: 3934055 (1976-01-01), Tamny
patent: 4017029 (1977-04-01), Walberg
patent: 4020866 (1977-05-01), Wiggins
patent: 4085892 (1978-04-01), Dalton
patent: 4148932 (1979-04-01), Tada et al.
patent: 4313475 (1982-02-01), Wiggins
patent: 4413788 (1983-11-01), Schaefer et al.
patent: 4613076 (1986-09-01), Dietz et al.
patent: 4724154 (1988-02-01), Cosentino et al.
Cox Jack L.
Scharfenberger James A.
Kashnikow Andres
Ransburg Corporation
Trainor Christopher G.
LandOfFree
System for dispensing of both water base and organic solvent bas does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System for dispensing of both water base and organic solvent bas, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System for dispensing of both water base and organic solvent bas will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-103617