Abstract: Improved method and apparatus for removing excess electrophoretic material from a coated interior workpiece surface wherein a flow of air is passed over the entirety of the electrophoretic coating to remove such excess electrophoretic material therefrom.

Abstract: An improved nozzle for electrophoretically coating the interior surface of a workpiece, such nozzle having an electrically conductive linear portion corresponding to a selected linear dimension of the workpiece, an electrically conductive head portion connected and disposed substantially normal thereto and corresponding to a closed bottom end of the workpiece, inlet tubing connected to a discharge orifice in the head portion of the nozzle for delivery of electrophoretic material onto the interior surface of the workpiece, and wherein associated means are provided for moving the workpiece and the nozzle relative to one another about an axis fixed relative to the workpiece and the nozzle and in a direction lateral to the selected linear dimension of the workpiece.

Abstract: Method and apparatus for electrophoretically coating a surface of an electrically conductive work piece having a selected linear dimension including the steps of: establishing the work piece at one electrical potential, flowing an electrophoretic coating in a linear stream corresponding to the linear dimension and in close proximity to the work piece surface, imparting an electrical charge to the electrophoretic coating, impinging the charged linear stream of electrophoretic coating onto the work piece surface and moving the work piece and charged linear stream relative to one another and in a direction lateral to the selected linear dimension, to electrophoretically coat the entirety of such work piece surface.