Electrostatic spraying

Details Electrostatic spraying Electrostatic spraying

1987-12-21

1989-08-08

Kashnikow, Andres

Fluid sprinkling, spraying, and diffusing

Electrostatic type

With automatic safety feature

239698, 239707, 239708, B05B 500

Patent

active

048545066

ABSTRACT:
An electrostatic spraying apparatus in which an electrode is mounted adjacent to the sprayhead, means are provided for causing a first electrical potential to be applied to liquid emerging from the sprayhead, and further means are provided for applying a second electrical potential to the electrode. The difference between the first and second potentials is sufficient to cause an intense field to be developed between the emerging liquid and the electrode, sufficient to atomise the liquid. The electrode has a core of conducting or semiconducting material sheathed in a "semi-insulating" material. This "semi-insulating" material has a dielectric strength and volume resistivity sufficiently high to prevent sparking between the electrode and the sprayhead and a volume resistivity sufficiently low to allow charge collected on the surface of the material to be conducted through the "semi-insulating" material to the conducting or semiconducting core.

REFERENCES:
patent: 820328 (1906-05-01), Alderman
patent: 2658009 (1953-11-01), Ransburg
patent: 3656171 (1972-04-01), Robertson
patent: 3680779 (1972-08-01), Reilly
patent: 3937401 (1976-02-01), Luderer et al.
patent: 4144110 (1979-03-01), Luc
patent: 4356528 (1982-10-01), Coffee
patent: 4515105 (1985-05-01), Danta et al.
patent: 4555698 (1985-11-01), Clark et al.
patent: 4576827 (1986-03-01), Hastings et al.
Fink, Donald G., Electronics Engineers Handbook, 1975, pp. 1-10, 6-3, 6-6.

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