초록 ▼

An electrostatic spray coating system for spraying conductive coatings such as water base paint has a grounded paint supply sub-system which intermittently supplies conductive coating material to a high voltage sub-system across an air space. An interlock system prevents conductive coating material

An electrostatic spray coating system for spraying conductive coatings such as water base paint has a grounded paint supply sub-system which intermittently supplies conductive coating material to a high voltage sub-system across an air space. An interlock system prevents conductive coating material from being transferred from the grounded sub-system to the high voltage sub-system while high voltage electrical potentials being applied to the high voltage coating material sub-system.

대표청구항 ▼

In an electrostatic coating system having a spray gun for ejecting highly electrically conductive coating material and an electrode charge to high voltage adjacent the location of ejection of the coating material from the spray gun having a high voltage power supply, and having a coating material su

In an electrostatic coating system having a spray gun for ejecting highly electrically conductive coating material and an electrode charge to high voltage adjacent the location of ejection of the coating material from the spray gun having a high voltage power supply, and having a coating material supply system supplying coating material to the gun, wherein the improvement comprises, a first sub-system in said coating material supply system containing coating material electrically grounded, a second sub-system in said coating material supply system containing coating material insulated from electrical ground and connected to said high voltage power supply, means for ejecting a stream of coating material into the atmosphere forming a portion of said first sub-system, means for receiving said stream of coating material as it is ejected across a predetermined air space forming a portion of said second sub-system, said air space having a sufficiently large predetermined dimension between said first and second means to prevent arcing in said air space when said second system is charged to a high voltage by said high voltage power supply, and control means connected to said ejecting means to prevent ejection of said stream when said high voltage power supply is charging said second sub-system to a high voltage.