Indirect charging electrostatic coating apparatus

Details Indirect charging electrostatic coating apparatus Indirect charging electrostatic coating apparatus

1990-08-01

1991-08-13

Kashnikow, Andres

Fluid sprinkling, spraying, and diffusing

Electrostatic type

With automatic safety feature

B05B 500

Patent

active

050390198

ABSTRACT:
Electrostatic coating apparatus including apparatus for establishing an electrostatic field for indirectly charging atomized droplets of paint or other coating material discharged from an atomizer. A flexible tube is formed into an annulus and is positioned coaxially with the atomizer. Pins extend through the tube and have short ends which project towards a workpiece to be coated. The tube is formed from an insulating outer layer and a semi-conducting inner layer having a high distributed resistance. The pins extend through the inner layer which is connected through a large resistance to a high voltage power supply. The apparatus is particularly useful for charging electrically conductive and semi-conductive materials delivered to the atomizer from a grounded source.

REFERENCES:
patent: 2710773 (1955-06-01), Sedlacsik
patent: 3393662 (1968-07-01), Blackwell
patent: 3408985 (1968-11-01), Sedlacsik, Jr.
patent: 4225090 (1980-09-01), Kako et al.
patent: 4872616 (1989-10-01), Behr et al.

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