System for Removal of Air Bubbles U.S. Patent 5,653,860. Aug. 5, 1997 1.W Nichob and WR. Warren Jr., assignors lo MitsuMhi Semiconductor America Inc., Durham, S.C

A method for removing air bubbles from an article ,Immersed in an electroplating solution comprising transporting the article through the solution using a rigid conveyor

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belt; producing alternating current energy at an ultrasonic frequency; converting the alternating current energy to mechanical vibrations at the ultrasonic frequency; and applying mechanical vibrations to the arti- cle through the rigid conveyor belt to cause the article to vibrate, in order to remove the air bubbles from the article.

Control of Appearance in Automotive Paint U.S. Pafent5,653,927. Aug. 5, 1997 M.D. Nynn and K.L. Jruog, assignors to Avery Dennison Corp., Pasadena, Calif.

A process for controllmg the appearance of a metallic automotive paint film contain- ing reflective flakes to achieve a random orientation of the reflective flakes, the pro- cess comprising casting a layer of a ther- moplastic and thermoformable pigment containing metallic automotive paint coat onto a carrier; the cast paint coat compris- ing a dispersion of a fluorinated polymeric material in a solvent-based solution of an acrylic resin; and drying the cast paint coat to fuse the paint coat and thereby form a finished metallic automotive paint film in which the parallel orientation of the reflec

tive flakes to one another is inhibited such that the flake orientation of the finished paint film provides a randomly oriented distribution of the reflective flakes.

Method of Forming Through-Holes U.S. Patent 5,653,893. Aug. 5, 1997 N.E. Berg, Bedford, N.H.

In a process for forming through holes in a printed circuit board substrate in which a metal foil clad circuit board having open positions in the metal foil where a hole is to be formed is subjected to a chemical etch, the improvement comprising chemically etching through the substrate board by means of a chemical etchant selected from the group consisting of a mixture of meth- ylene chloride and hydrofluoric acid, and a mixture of methylene chloride, hydrotluo- ric acid, and xylene.

Method for Painting U.S. Patent 5,654,036. Aug. 5, 1997 K. Sugiura, assignor to Guyakin Kogyo Co. Lfd., Aichi, Japan

A method for painting a surface of a substrate. which comprises applying a

; l Destroy cyanide economically

h l Comply with EPA regulations l Reduce water consumption

l Cut labor costs s t Recover most platable metals,

including:

Cadmium/Copper/Gold/ Nickel/Nickel-Iron/Silver/

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METAL FINISHING l APRIL 1998 81