Granted in the Metal Finishing Field Printed copies of patents are furnished by the Patent and Trademark Office for $3.00 each. Address orders to: Commissioner of Patents and Trademarks, Washington, D.C. 20231.

POWDER COMPOSIT ION REDISPERSIBLE IN WATER U.S. Patent 6,228,937. May 8, 2001 H. Eck et al., assignors to Wacker Chemie GmbH, Munich, Germany

A crosslinkable powder composi- tion, which is redispersible in wa- ter and consists essentially of 30 to 95 parts by weight of a water- insoluble, film-forming polymer; 5 to 70 parts by weight of a water- soluble polymer selected from the group consisting of polyvinyl alco- hols; 0.01% by weight of at least one phase transfer catalyst.

M O r i O n OF CHARGING USING NONINCENDIVE ROTARY ATOMIZER U.S. Patent 6,230,993. May 15, 2001 R.M. Austin et al., assignors to Illinois Tool Works Inc., Glenview, Ill.

An atomizer for mounting on an output shaft of a motor to be ro- tated by the motor, the atomizer including a first, front surface, a second, back surface, a coating ma- terial cup into which coating mate- rial to be atomized by the atomizer is dispensed, and at least one pas- sageway from the cup to the front surface to permit the flow of coating material from the cup to the front surface as the atomizer is rotated, the front surface terminating at a discharge edge from which the coating material is discharged as the atomizer is rotated, an electri- cally conductive first electrode, an electrically conductive first elec- trode, an electrically non-conduc- tive portion, and a semiconductive coating provided on the back sur- face, the semiconductive coating terminating adjacent the edge, the first electrode including the cup.

ELECTROPLATING PROCESS U.S. Patent 6,231,619. May 15, 2001 S.M. Florio et al., assignors to Shipley Co., Marlborough, Mass.

A process for depositing metal on a planar substrate having open- ings pass ing th rough the full thickness of the substrate com- prising providing a dispersion of c a rbonace ous par t i c les in an aqueous medium within a treat- ment container, contacting the substrate with the dispersion to form a coating over surfaces of the substrate, compacting and par- tially drying the coating of the carbonaceous particles while re- moving entrapped water, air bub- bles, and particles from within the openings passing through the subs t r a t e by pass ing the sub- strate between a pair of opposed resilient circular rollers spaced apart from each other so as to deform as the substrate passes between the rollers and to remove entrapped water, air bubbles, and particles from within the open- ings by suction, completing the drying of the carbonaceous coat- ing, and plating metal on those portions of the substrate coated with the carbonaceous coating from an electrolytic metal plating solution.

PAINT OVERSPRAY EXHAUST AIR FILTER U.S. Patent 6,231,646. May 15, 2001 R. Schweizer and J.W. Motter, assignors to Chemco Manufacturing Co., Inc. Northbrook, Ill.

A spray booth with an overspray exhaust air filter for removing liq- uid paint particulates from an air stream being exhausted from the

spray booth, the overspray exhaust air filter comprising a primary col- lection filter through which the air stream with the liquid paint partic- ulates flows and which is adapted to entrap at least some of the par- ticulates of at least a given size; and an electret media mechanically attached to the primary filter and positioned relative to the primary collection filter such that the air stream flows through the electret media after it flows through the primary collection filter so as to en- trap at least some of the particu- lates remaining.

ZINC PHOSPHATE CONVERSION COATING U.S. Patent 6,231,688. May 15, 2001 H. Ishii and Y. Nagashima, assignors to Henkel Corp., Gulph Mills, Pa.

A liquid zinc phosphate conver- sion coating ba th composi t ion comprising water, zinc phosphate, and 50 to 1,500 ppm of an organ- operoxide conversion accelerator selected from the group consisting of ethyl hydroperoxide, isopropyl hydrope rox ide , t e r t - b u t y l hy- droperoxide, tert-hexyl hydroper- oxide, diethyl peroxide, di-tert- bu ty l peroxide , a c e t y l a c e t o n e peroxide, cumene hydroperoxide, t e r t - b u t y l p e r o x y m a l e i c acid, monoperphthalic acid, and per- succinic acid.

MULTILAYER ELECTRODEPOSITED COATING U.S. Patent 6,231,738. May 15, 2001 T.S. December, assignor to BASF Corp., Southfield, Mich.

A method of making a multi layer electrodeposited composition com-

154 Metal Finishing

prising applying a first coating composition by electrophoretic deposition to a substrate to make a coated substrate; subjecting the coated substrate to an amount of energy effective to cause the coated substrate to become a con- ductive coated substrate; apply- ing a second coating composition to the conductive coated substrate by electrophoretic deposition to make a mult icoated substrate; and subjecting the multicoated substrate to conditions sufficient to result in the cure of the second coating composition so as to make a cured mult icoated substrate , wherein the second coating com- position comprises an anodic elec- trocoat coating composition con- sisting of a polymer comprising a

backbone hav ing appended thereto at least one carbamate- functional group.

CLOSED-LOOP PHOSPHATIZING SYSTEM U.S. Patent 6,235,111. May 22, 2001 S.A. Comiso et al., assignors to EZ Environmental Solutions Corp., Menlo Park, Calif.

A system for phosphatizing an ob- ject comprising a floor assembly for suppor t ing an object and adapted to direct excess run-off fluids, which are flowed over the object towards a run-off portion of the floor assembly; a closed-loop phosphat izing assembly config- ured to pass a phosphatizing re- agent solution over the object dur- ing a phosphat iz ing procedure

and having a collection compart- ment in fluid communication with the run-off portion for receipt of substantially all the reagent run- off fluids from the floor assembly.

CONICAL SPUTTERING TARGET U.S. Patent 6,235,170. May 22, 2001 D.A. Glocker, assignor to David A. Glocker, Rush, N.Y.

A magnetron for sputtering a tar- get material onto a substrate hav- ing a radius to form a coating of the target material upon a surface of the subs t ra te comprising a frusto-conical ta rge t off-spaced from the substrate and having an inner surface for being sputtered.

ANODIZ ING VALVE METALS U.S. Patent 6,235,181. May 22, 2001

Established in 1938

T h e P l a t i n g S h o p ' s R i g h t H a n d M a n . N e w o r R e t r o - f i t s

• Automatic Plating & Finishing Systems • Manual Lines • Spray Washers • Waste Treatment Systems • Ventilation-Fan & Scrubber Units • Tanks - Mild Steel, Stainless Steel, Lined

(Koroseal, Rubber, FRP, PVC, Polypro, Lead and More)

• Structural Steel - All Types

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L.W. Lefort is commi t ted to "Total Responsibi l i ty"

G i v e U s A C a l l - W e K n o w W e C a n H e l p

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On-Line Process C o n t ~ for plat ing solutions an metal coating thickness

M e t o r e x ~ C-9

• For fast monitoring and automatic precise control of plating baths

• Rugged and durable construction

X-MET ®

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• For fast and ac of thin and ultr or paper

Rugged syster~ in harsh, even

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June 2002 155