method and device for tauchbeschichten an object with large or numerous holes

摘要

A method and system is disclosed in which an article (12), having large open areas or a multiplicity of apertures, is dip coated. The method and system is particularly adapted for use in coating a grid of a corona charging device utilized in the xerographic process. A transport system (18,19) immerses and removes the article from a tank (14) storing coating material (16). Unwanted coating material is left in the apertures of the article. Thereafter, the transport system moves the article past an ultrasonic wave source (26) which applies air travelling ultrasonic radiation against the article. The impact of the ultrasonic energy transmitted to the unwanted coating material across the apertures causes the cavitation thereof. The cavitation of the unwanted coating material effectuates its removal from the apertures. The removed coating material is returned to the supply of coating material (16) in which the article was immersed. IMAGE