boards and a heatable doctor blade is ap- plied against the roll and infrared lamps are arranged parallel to the doctor blade.

Powder Spray Booth U.S. Patent 5,421,666. June 6, 1995 F: Trevisan, Verona, /&t/y

Adjustable section powder spraying booth.

Method for Cleaing U.S. Patent 5,421,&?99. June 6, 1995 CR. Hamilton et a/., assignors to Golden Technologies Co. Inc., Golden, Co/o.

A method for cleaning manufacturing lubricants and coolants from metal contain- ers, comprising contacting with a terpene cleaning agent having a pH between 6 and 9; whereby the surface of the containers cleaned has a roughness average that is less than the roughness average of containers cleaned using an acidic or caustic cleaning agent.

Surface Treatment for Aluminum U.S. Patent 5,421,913. June 6, 1996 S. lkeda and S. Meguro, assignors to Nippon Paint Co. Ltd., Japan

A surface treatment bath for aluminum or its alloys consisting essentially of tO_ 1000 ppm of niobium ion and/or tantalum ion, 10-500 ppm of zirconium ion and/or titanium ion, l&500 ppm of phosphate ion, and l-50 ppm of isolated fluorine ion released from compounds selected from the group consisting of HF, NH_,F, NH,HFz, NaF and NaHF,, and having a pH of 1.5- 4.0.

Regeneration of Acid Cupric Chloride Etchant U.S. Patent 5,421,966. June 6, 7995 J.E. Ox/ey, New Haven, Corm.

A process for electrolytic regeneration of an acid cupric chloride etching bath comprising an electrolytic cell with a flow- through anode and means for flowing a liquid anolyte through the anode, and a planar cathode having means for contacting with a catholyte; flowing a solution con- taining cuprous chloride through the anode to contact all of the interior surface and flowing the same solution into contact with the cathode; and maintaining the current density and potential so as to plate metallic copper from the catholyte at the cathode, and produce cupric chloride at the anode without hydrogen or chlorine evolution.

Vacuum Coating Device U.S. Patent 5,421,979. June 6, 1995 D. E. Stevenson, assignor to Photran Corp., Lakevile, Minn.

A load-lock drum-type coating appara- tus.

Electrodeposited Copper Foil U.S. Patent 5,421,9&l June 6, 1995 S.J. Clouser et al., assignors to Gould Inc., Eastlake, Ohio

A process for making electrodeposited copper foil, comprising preparing a copper deposition bath comprising water, copper ions, sulfate ions and at least one active sulfur-containing material, said bath con- taining less than 5 ppm chloride ions; and applying electric current to electrodeposit copper onto a rotating cathode using a cur-

rent density in the range of 800 to 3000 A/ft, and continuously removing copper foil from the cathode, said electric current being direct current or alternating current with a direct current bias.

Photoresist Waste Treatment U.S. Patent 5,422,032. June 6, 1995 J.A. Brown, assignor to Viktron Ltd. Partnership, Carol Stream, 111.

A method and composition for waste treatment of organic strippers containing metals.

Precision High Rate Electroplating Cell U.S. Patent 5,421,987. June 6, 1995 G. Tzanavafas, San Jose, Calif. and U. Cohen, Pa/o Alto, Calif.

A method of electroplating a metal film on the surface of a substrate using an an- ode/jet assembly having an anode portion and a plurality of nozzles, comprising po- sitioning the substrate near the nozzles such that a flow of an electroplating solu- tion through the nozzles is directed sub- stantially normal to the surface; causing relative rotation to occur between the an- ode/jet assembly and the substrate; supply- ing an electroplating solution to the anode/ jet assembly such that a substantially uniform flow distribution of the electro- plating solution strikes the surface of the substrate as the relative rotation occurs be- tween the anode/jet assembly and the sub- strate, and generating an electroplating cur- rent through the electroplating solution between the anode/jet assembly and the substrate.

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Hazardous Waste Reduction in Metal Finishing Industry

by PRC Environmental Management, Inc. 205 pages $42.00

This study conducted for the State of California identifies three categories of waste reduction technology available to metal finishers; namely, source reduction, recycling and alternative treatments. a generic audit procedure is provided along with three extensive case histories.

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94 METAL FINISHING . JANUARY 1996