surface has an irregular periphery. so that

when masked, the first portion will remain unpainted while a second adjacent portion of the surFace is painted.

Bismuth Coating Protection for Copper U.S. Patent 5,631,091. May 20, 1997 A.M. Piano, assignor to Fry’s Metals Inc., Providence. RI

A composition effective for immersion

plating a coating of bismuth metal onto a copper containing surface comprising an acid-solubilized bismuth salt and an iodide.

Carbon Dioxide Blasting U.S. Patenf 5,632, I.50 May 27, 1997 G. W. tfenzkr, assignor to l.iquid Carbonic Corp., Oak Brook, 111.

A carbon dioxide pellet blast and carrier gas syatern.

Vehicle Wheel U.S. Patent 5,632,529. May 27, 1997 D.C. Wei, assignor fo Hayes Wheels lnternationai Inc., Romulus, Mich.

A plated vehicle wheel having nonplated tire bead teats.

Voltage Block for a Coating System U.S. Patent 5,632,876. May 27, 1997 H. T. Allen et al., assignors to Ransburg Corp., lndianapofis

U.S. Patent 5,632,&?22. May 27, 1997 RI. Knipe Jr. et al., assignors to Da/co lndusfries Ltd., Spring Valley, N.Y

A coating system comprising a source of electrically noninsulati vt: coating material, a dispenser for dispensing the coating ma- terial toward an article lo be coated thereby. an electrostatic high potential supply for

supplying charge to the coating material, and means for coupling the high potential supply across the dispen,;er and the article.

A method for purging coating equipment comprising diluting a purge concentrate

with water, the purge concentrate being a water-based concentrate without volatile organic compounds containing water. a de- tergent builder. and a wetting agent, the diluting step forming a purge solution;

heating the purge solution to a temperature of 100 to 160°F; and supplying the purge solution to the coating equipment.

Rotary Powder Applicator Dual-Component Mixing System U.S. Pafent 5.632,448. May 27, 1997 U.S. Patent 5,632,8/7. May 27, 1997

K.1 Alexander et al., asslgrlors fo Flansburg Corp., T. Hiraga et al., assignors fo Ansburg Industrfal

lndranapoiis Fimshing K.K., Tokyo

An apparatus for dispensing pulverulent

coating material entrained in a stream of a bearing gas. the apparatus comprising a dispenser. a motor for rotating the dis-

penser, the motor having an output shaft. the dispenser being mounted on the output shaft to be rotated thereby, the dispenser having a somewhat bell-shaped interior.

A dual-component system for mixing together a main coating agent and a hard- ening agent.

Coating for Pretreating Metal Surfaces U.S. Patent 5,632,828. May 27, 1997 J.J.H. Verberg, assignor to ADW Chemical Products B. V., Netherlands

Water-Based Flushing of Coating Equipmelnt

A coating preparation lor pretreating metal surfaces comprising an acrylic acid

The Chemical Analysis of Ekctropkdng Soh~tions

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