Apparatus for coating workpieces with a plastic material

Claim 1

Apparatus for coating workpieces with a fluidized plastic material comprising a tank having a fluidized plastic coating material therein for coating workpieces therein which have been preheated to a predetermined high temperature, a fixed support frame extending over the tank, a vertically movable support mounted on the fixed support frame for movement between raised and lowered positions, means on the lower end of the movable support to releaseably suspend a workpiece thereon, a pneumatic vibrator secured to the lower end of said vertically movable support for vibrating said support and workpiece thereon when said workpiece is held in a suspended position within the fluidized plastic coating material within the tank, and means to supply air to said vibrator including an air valve positioned on the fixed support frame adjacent the movable support and having means in contact with the movable support in an upper position for maintaining the air valve in a closed position, the downward movement of said movable support from the upper position to a lower position releasing the air valve for movement to an open position to supply air to the vibrator from the supply means.