Chemistry: electrical and wave energy – Apparatus – Electrolytic
Patent
1990-09-11
1992-03-24
Tufariello, T. M.
Chemistry: electrical and wave energy
Apparatus
Electrolytic
204297W, C25D 1700
Patent
active
050985426
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.
REFERENCES:
patent: 1700178 (1929-01-01), Porzel
patent: 3671405 (1972-06-01), Mattia
patent: 3962047 (1976-06-01), Wagner
patent: 4259166 (1981-03-01), Whitehurst
patent: 4280882 (1981-07-01), Hovey
patent: 4323433 (1982-04-01), Loch
patent: 4534832 (1985-08-01), Doiron, Jr.
patent: 4659466 (1987-04-01), Shafer et al.
Plascencia Rene R.
Reinhardt Paul A.
Baker Hughes Incorporated
Tufariello T. M.
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