Abstract: A cover especially adapted for use with electrodeposition coating tanks is disclosed for preventing contamination of the liquid coating material in the tank, reducing evaporation of coating liquid solvent from the tank, preventing condensate dripping and spoilage of parts within the tank, and providing easy access to the tank interior for maintenance purposes. The cover includes a curved configuration extending over the tank from the tank sides and at least one movable panel for access to the tank interior. The movable panel or panels are preferably curved to match the cover configuration and may be transparent for visibility into the tank without opening the cover.

Abstract: Electrodeposition coating apparatus is disclosed for charging and applying a liquid coating material, such as a water based resin solution, to oppositely charged workpieces with increased efficiency. The apparatus includes a tank constructed from hollow vertical, V-shaped columns, side panels extending therebetween and reinforcing members extending along the exterior. The tank includes a liquid level control weir and liquid circulation eductors and nozzles on its sides, ends and bottom for circulating the liquid coating material within the tank. Electrodes for electrically charging the coating liquid are recessed between the vertical, sidewall columns to minimize any flow disruption or turbulence within the tank while provided sufficient liquid contact for proper charging. A separate liquid recirculation tank is provided adjacent the main tank for collecting and pumping liquid which flows over the weir back to the liquid circulation system.