between the first and second end plates and supported on the second set of heat cx- change plate support bars.

Paint Masking Film U.S. Patent 5741,389. Apr. 21, 1998 T. Yoshino, assignor to Yoshino Kasei Co. Ltd., Tokyo

A masking film roll for use in painting, method for producing it, and tubular film from which it is produced.

Sputtering Apparatus U.S. Patent 5,741,405. Apr. 21, 1998 B.S. Sfatnikov ef al, assignors fo /PMMS (Development and Production), Migdal Haemek, /s/ael

A method of sputter depositing a layer of a metallic material on a printed circuit bo;ird substrate in a vacuum. characterized in that the layer ix applied to the substrate by se- quentially effecting a plurality of partial sput- ter deposits thereon during a plurality of ( )p- erational periods each including a sputter- deposit time interval followed by a nondeposit time interval of at least equal duration to the sputter-deposit time interval.

Silver-Plated Aluminum Conductor U.S. Patent 5,741,407. Apr. 21, 1998 N. Yu, assignor fo Axon’ Cable ,%A., Monfmirail, France

An apparatus for continuously coating a conductor whose core is based at least par- tially on aluminum, the apparatus compris- ing means for electroplating at least one layer of silver and comprising a line of tanks containing various baths.

Multilayer Coating U.S. Patenf 5,741,552. Apr. 21, 1998 H. Takayama and E. Nishimura, assignors to Njppon Painf Co. Lfd., Osaka, Japan

A method of forming a multilayer coat- ing comprising the steps of applying a basecoat composition to an article to be coated, applying a topcoat to the resultant basecoat, and separately or simultaneously baking the resultant coats. wherein the top- coat composition contains a blend of at least one compound having a plurality of hydrosilyl groups and at least one com- pound havng a plurality of alkenyl groups and a catalytic amount of hydrosilylation catalyst: and the base coat composition

PERMANENT FUME SUPPRESSANT HARD OR DECORATIVE PLATING

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contains a cross-linking agent, which does not interfere with the hydrosilylation reac- tion of the topcoat composition.

Polyimide Composition for Electrodeposition U.S. Patent 5,741,599. Apr. 21, 1998 Y Oie et al., assignors to PI Materials Research Laboratory, Kanagawa-ken, Japan

A polyimide composition for elec- trodeposition comprising a neutral salt of a polyimide, which is the product of reaction between an aromatic tetracarboxylic dian- hydride and an aromatic diamine. a polar solvent that dissolves the polyimide, water. and a poor solvent for the polyimide, said polyimide being prepared using an aro- matic diaminocarboxylic acid as part of the aromatic diamine.

Powder Coating Composition U.S. Patent 5,741,602. Apr. 21, 1998 M. Hoppe et ab, assignors to EMS-lnvenfa AG, Zurich, Switzerland

A heat-curable. epoxy-free powder coat- ing composition for preparing matte coat- ing; comprising a dry blend of at least two

Circle 040 on reader information card

METAL FINISHING . SEPTEMBER 1998 103

tlill‘crcnt coating powders. each comprising

a binder resin comprised of a carbouyl- tcrminalcd polyester resin and :I &hy- tll-oxy;ilhylami~lc componenr.

Aqueous Binder Composition U.S. Patenf 5.741.849. Apr. 21. 1998 H. B/urn et al., assignors fo Bayer AG, Leverkusen, Germany

An aqueous hinder composition. which contains 0.5 lo 07(k hy weight of an aque-

ous polyol componcnl and 3 to 35% of ii

polyi5ocyanatc co1iipoii~n1.

Clearcoating Composition U.S. Patent 5,741,8&I Apr. 21, 1998 KS. Wpey 111 and E.I. Szowej, assignors fo 7he Sherwin- W,Lams Co., Cleveland

A Iiyclroxy-l’unctionnl polymer havi!lg ;I

numhcr average molecular weight, as de- Icrnlinccl hy gel pet-meation chromato>;rn- phy. III’ I ,X00 to 2,700 and which con,rists essentially of polynkked monomers ot‘ IO lo 40% by wei,$t. baaed on the lotal weight

of lhc polymer, styrene; 20 to 55% by weight isohornyl methucrylate: and 2 1 IO 5% by weight hydroxypropyl methacry-

late; where the total of the monomers An airflow diffuser apparatus for use equals 100%. with a paint booth.

Vibrating Abrasive Cleaning Apparatus U.S. Patent 5,743,790. Apr. 28, 1998 ,LO. Jrahan, assignor to Drillfech Technologies Inc., Houston

A method l’or cleaning articles, which comprises placing arlicles. 2111 abrasive me- dia, and cleaning fluid in ii container angu- Iarly mounted OII a frame by ;I plurality of opposing parallel compression and tension springs for oscillation ol’ the container: en-- gaging a primary power source for engag- ing a secondary hydraulic power source; pumping cleaning lluid through a filter hys-. tern; in,jectinp cleaning fluid into the con- taincr; oscillating the container: and recir- culating cleaning fluid through a series of filters hack into the container through an injcclion means.

Paint Spray Booth U.S. Patent 5,743,793. Apr. 28, 1998 S. J. Parks and E. H. long, assignors lo Ford Global Technologies Inc., Dearborn, Mich.

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Multi-stage washers for surface preparation of metal and plastic substrates.

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Primer Composition U.S. Pafent .5,743,951. Apr. 28, 1998 T Ozai et al, assignors to Shin-EM Chemical Co. Ltd, Tokyo

A primer composition, which comprises an organosilicon compound; a catalyst for condensation for the organosilicon com- pound: and an organopolysiloxane resin.

Vehicle Powder Coating System U.S. Patenf 5,743,958. Apr. 28, 1998 J.R. Shutic. assignor fo Nordson Corp., Westlake, Ohio

Apparatus for supplying powder coating m.lterial comprising a source of virgin powder coating material. a primary hopper, and a feed hopper: a first transfer device, connected between the said source and pri- mary hopper, which transmits powder coat- ing material under the application of neg- ative presiure from the source to the prrmary hopper; a second transfer device. connected between the primary hopper and feed hopper, which transmits powder coat- in;; material under the application of neg-

h al I-ma rk \‘hdl-,m.%k\ n [Goldsmith’s Ha//, London,

England, where gold and silver articles were assayed and stamped to indicate origin, purity, or genuineness] 2 : a distinguishing characteristic, trait, or feature

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TW CORPORATION 2828 Highland Avenue, Cincinnati, OH 45212 800.998.8396*513.731.3400~513.731.8113 Fax

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104 METAL FINISHING . SEPTEMBER 1998