Rene P Plascencia

US Patent:

50985426, Mar 24, 1992

Filed:

Sep 11, 1990

Appl. No.:

7/580826

Inventors:

Paul A. Reinhardt - Houston TX
Rene R. Plascencia - Houston TX

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

C25D 1700

US Classification:

204194

Abstract:

An electroplating shield for providing controlled electroplating of an article having an irregular surface of crests and valleys. The shield, being made of a nonconductive material such as chlorinated polyvinylchloride, includes at least one aperture that spatially corresponds to the valleys of the article to be plated. A remote alignment fixture may be used to precisely align the shield apertures with the article valleys. Alternatively, a plurality of threaded alignment holes may be interspersed between a plurality of shield apertures, alignment being accomplished by threading a plurality of alignment screws through the threaded alignment holes and into the article valleys. A cylindrical embodiment of the electroplating shield having at least one spiralling aperture, is particularly suited for uniform plating of a spiral lobe rotor.