Patent ID: 6755913
Filing Date: 2004-06-29
Classification: B05B

Abstract:
A color changing apparatus for multiple color coating of conductive coating material, comprising a first pipe joint movable on a guide rail and an electrostatic spray device connected to said first pipe joint through a pipeline; a plurality of coating material supply circulation circuits are provided, each including a respective liquid tank for holding a coating material source, a pump and a movable second pipe joint that can be selectively engaged with said first pipe joint, the liquid tank and the pump and said second pipe joint being connected through a pipeline; wherein when said first pipe joint is selectively engaged with one of said plurality of second pipe joints said first pipe joint and the others of said plurality of second pipe joint in the plurality of coating material supply circulation circuits are disengaged from each other, wherein at least one of said movable second pipe joint is electrically grounded when disengaged from said first pipe joint and electrical ungrounded when engaged with said first pipe joint.