Electric discharge coating apparatus
AssigneeOnoda Cement Co., Ltd.
InventorTsutomu Itoh
Life of this patent
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Abstract
A face-silent discharge electrode which includes plural parallel electrode bars separated from each other at a distance and arranged in a face is disposed to confront a substrate. A powder coating material is supplied in the space between said electrode and said substrate. An AC voltage is impressed on the electrode bars adjacent each other to generate a silent electric discharge over the entire surface of said face-silent discharge electrode. Concurrently, a DC voltage is impressed between the electrode bars and the substrate so that the powder coating material may adhere to a surface of the substrate to form a layer of uniform thickness.
Claims16
An electric discharge coating apparatus for powder coating a substrate comprising a face-silent discharge electrode disposed to be separated from and to confront said substrate, means for introducing a powder coating material into a space between said face-silent discharge electrode and said substrate, power supply means coupled to said face-silent discharge electrode for impressing an AC voltage to cause a silent discharge on a surface of said face-silent discharge electrode, and means for impressing a voltage between said substrate and said face-silent discharge electrode.
Dependencies are inferred from the claim text.