Coated Abrasive Belt U.S. Pafent 5,609,706. Mar. Ii, 1997 H. W Benedicf et a/., assignors to 3M Co., St. Paul, Minn.

A method for preparing a coated abra- sive belt with an endless, seamless backing.

Sputtering Apparatus U.S. Patent 5,609,739. Mar. 11, 1997 1. Aokura et al, assignors to Matsushita Electric lndustfial Co. Ltd., Osaka, Japan

An apparatus for performing a sputter- ing operation by using a rectangular target made of ferromagnetic material, the appa- ratus comprising an electrode in which one first permanent magnet is disposed on each side edge of a front surface of the target; polarities of the first permanent magnets confronting each other with the target in- terposed between the first permanent mag- nets are opposite to each other; one second permanent magnet is disposed on each side edge of a rear surface of the target; polar- ities of the second permanent magnets con- fronting each other with the target inter- posed between the second permanent

magnets are opposite to each other; and the polarity of each second permanent magnet disposed on the rear surface of the target is the same as that of the first permanent magnet disposed on the front surface of the target.

Method for Regeneration of Electroless Nickel Plating Solution U.S. Patent 5,609,767. Mar. If, 1997 E.T. Eisenmann, Albuquerque, N. M.

A method for regeneration of spent elec- troless nickel plating solution containing nickel ions. hypophosphite ions, an acetic acid or acetate buffer, a stabilizer, phos- phite ions, sulfate ions, and water compris- ing passing through a chelating ion ex- change resin column to remove selectively and substantially all nickel ions from the solution for retention in the resin column; treating the effluent with a base selected from the group consisting of calcium hy- droxide and magnesium oxide in an amount sufficient to precipitate substan- tially all phosphite ions and a major portion

of sulfate ions therefrom, the precipitate being substantially free of nickel; separat- ing the resulting solution from the precip- itate: eluting the nickel ions from the ion exchange resin resulting with a solution of hypophosphorous acid; and combining the resultant solutions to obtain a regenerated plating solution.

Magnetic Paint Additive U.S. Pafent5,609,766. Mar. 11, 1997 D.J. Dee& Mendon, Mass.

A magnetic sign board comprising a substrate painted with a paint comprising paint and, per gallon of paint, from 500 to 2,000 grams ferromagnetic powder having a mixed particle size varying from 0.01 to 44 urn.

Method of Forming a Topcoat U.S. Patent 5,609,918. Mar. 11, 1997 S. Yamaguchi et a/., assignors to Kansai Painf Co. Ltd, Amagasaki, Japan

A method of forming a topcoat by form- ing in sequence a colored basecoat on a

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124 METAL FINISHING ?? NOVEMBER 1997

substrate and a clearcoat, the method being characterized in that at least one of the colored basecoat and the clearcoat is formed by a curable coating composition consisting essentially of a resin having a hydroxyl group, a carboxyl group and an epoxy group in the same molecule, or a mixture of a hydroxyl and carboxyl con- taining resin with a polyepoxide: a silicon compound having, per molecule, at least one silanol group and/or at least one hy- drolyzable group directly bound to a silicon atom; and an organic solvent.

Waterborne Polyurethanes U.S. Patenf 5J111.224. Mar. 11, 1997 J.S. DePue and G.G. Menovcik. assionors to BASF Corp., Southfield, Mich.

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Water-dispersible ionic and nonionic polyamide-modified polyurethane resins for use in coating compositions.

Nongelling, Anionic Polyurethane U.S. Patent 5,610,232. Mar. 11, 1997 K Duan et ab, assignors to H.B. Fuller Licensing & Financing Inc.. Arden Hits, Mich.

An aqueous dispersion of an anionic poly- urethane, the polyurethane comprising the reaction product of an isocyanate terminated polyurethane prepolymer and water, the poly- urethane prepolymer comprising the reaction product of a polyol component and a diiso- cyanate component, the polyol component comprising a sulfonated polyester polyol; a hydroxy carboxylic acid; and a diisocyanate selected from the group consisting of aro- matic diisocyanates, isophomne diisocyar- ate, hexamethylene diisocyanate, and mix- tures thereof.

Aqueous Coating Composition U.S. Pafenf 5,610,233. Mar. If, 1997 M.K Shmla, assignor to Easfman Chemical Co., Kingsport, Jenn.

An aqueous coating composition com- prising 1 to 60% by weight of a water- soluble or water-dispersible cellulose ester; 5 to 90% of an amino resin cross-linking agent; 0.1 to 15% of an acid catalyst; and 5 to 50% water, wherein the water-soluble or water-dispersible cellulose ester when dis- solved or dispersed in the water and mixed with the amino resin cross-linking agent in the presence of the acid catalyst forms a network of high molecular weight cmss- linked polymer.

Carbon Dioxide Spray Device U.S. Patent 5,671,491. Mar. 18, 1997 C.W. Bowers, assrgnor to Hughes Aircraft Co., Los Angeles

A modular jet spray device for produc- ing a carbon dioxide snow for cleaning submicron-sized particles and molecular films.

Resin-Coated Fastener U.S. Patent 5,611,652. Mar 18, 1997 f7.J. Duffy and E.D. Sew, assignors to Nylok Fastener Corp., MaComb, AM.

A reusable prevailing torque, self-lock- ing fastener comprising a fastener body

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