Methods and apparatus for treating an article
Abstract
Abstract AN ARTICLE IS TREATED IN THE PRESENCE OF AN ELECTROLYTE AND AN ELECTRODE, FOR EXAMPLE, IN ELECTROPLATING THE INNER WALL OF A TUBE. A CONSTANT ELECTRICAL POTENTIAL DIFFERENCE IS APPLIED CONTINUOUSLY ACROSS THE ARTICLE AND THE ELECTRODE WITHIN THE ELECTROLYTE. A DIELECTRIC BLOCKING ELEMENT ENGAGES A PORTION OF THE ARTICLE IN SUCH MANNER AS TO INTERRUPT THE FLOW OF TREATING CURRENT BY SHIELDING THE PORTION FROM SUBSTANTIAL EXPOSURE TO THE ELECTROLYTE. THE BLOCKING ELEMENT IS ALTERNATIVELY DISENGAGED FROM, AND REENGAGED WITH, THE PORTION OF THE ARTICLE UNDERGOING TREATMENT, PROVIDING A PULSED EFFECT IN THE APPLICATION OF TREATING CURRENT WITHOUT THE UTILIZATION OF ANY ELECTRICAL SWITCHING MECHANISM. AN APPROPRIATE SELECTION OF BLOCKING ELEMENT SHAPES, SIZES, NUMBERS AND SPACINGS PERMITS CONTROL OF THE TREATING CURRENT WAVEFORM.
Inventors
- 👤 R Haynes
Bibliographic Details
Claims Analysis
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