20%; and additives selected from the group consisting of solvents, catalysts, flow agents, hindered amine light stabilizers, and ultraviolet absorbers present in an amount between 1 to 15%.

Internal Finishing Tool U.S. Patent 5,496,365. Mar. 5, 1996 AI Scheider and R.B. Warner, assignors to Jason Inc., Cleveland

A method of making a twisted stem abrading tool comprising the steps of form- ing an elongated strip of abrasive contain- ing plastic, cutting the strip to a given length, forming transverse slits into the lat- eral edges of the strip, the slits on one edge being longitudinally offset from the slits on the opposite edge, placing the strip in the bight of a cotter pin, and clamping and twisting the corer pin to form a helical, twisted-stem abrading tool.

Coated Abrasive U.S. Pafent 5,496,386. Mar. 5, 1996 DE. Broberg and D. W Bange, assignors to 3M, St. Paul, Minn.

A coated abrasive article comprising a backing having at least one major surface; an abrasive coating comprising shaped abrasive particles, diluent particles, and a binder: and wherein the abrasive particles are rod-shaped and have an aspect ratio of at least one to one.

Recycling Industrial Waste U.S. Pafent5,496,392. Mar. 5, 1996 B.H. Sims and Cl. Philipp, assignors to Enviroscience, Hot Springs, Ark.

A process for recycling industrial waste materials comprising blending one or more industrial waste materials comprising at least one component selected from the group consisting of reducible metals, vola- tile metals, and nonreducible metal oxides, at least one carbonaceous reducing agent, and at least one primary fluxing agent, into a homogenous mass; curing and drying at a temperature of 170 to 240°F for a period of time such that the resulting particles have a moisture content of less than 10.0%; heat- ing and melting the resulting particles at a temperature of from 1,660 to 3,100-F such that a reducing atmosphere is created

within the structure of the particles from the release of said reducing agent, thereby forming reducible metals, volatile metals, a molten slag comprising nonreducible metal oxides, and exhaust products; and separat- ing and recovering at least one component.

Recycling Paint Waste U.S. Patent5,496,404. Mar. 5, 1996 J. W. Price and D. M. Long, assignors to Waste Markets Inc., Ventura, Calif.

A process of recycling waste by utilizing the waste as an additive ingredient in the manufacture of Portland cement, eliminat- ing the need for disposing of the waste in a landfill where the Portland cement is pro- duced from a cement clinker, which has been produced by burning.

Ultrasonic Vibration Generator for Cleaning U.S. Patent 5496,411. Mar. 5, 1996 5.H. Candy, assignor to Halcro Nominees Pfy. Ltd., Australia

An ultrasonic vibration generator com- prising a transducer for converting an elec-

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124 METAL FINISHING ?? NOVEMBER 1996