EMBOSSED METAL GASKETUS. Patent 5,989,786. Nov. 23, 1999M.G. Sitko and A.G. Wesley,assignors to Farnam / MeillorSealing Systems Inc., Troy, Mich.

A method of manufacturing ametal gasket including at leastone sealing port having a beadcircumscribing the peripherythereof, the bead being defined ona first side of the metal gasket bya raised surface area and on asecond side of the metal gasket bya recessed surface area by expos­ing the gasket to a chemical etch­ing agent thereby forming op­posed raised and recessedsurfaces areas of a bead circum­scribing the periphery of the atleast one sealing port.

CATALYTIC SOLUTION FORELECTROLESS PLATINGUS. Patent 5,989,787. Nov. 23, 1999O. Kanoh et al., assignors to MurataManufacturing Go., Ltd., Japan

A method for electroless platingcomprising applying a hydrophilicactivating catalytic solution forelectroless plating to a substratefor form a photosensitive film onthe substrate, the hydrophilic ac­tivating catalytic solution com­prising a mixture of lactate, pal­ladium salt and an alkalinemedium; exposing the photosensi­tive film to radiation to deposit apalladium catalyst on the sub­strate; and electroless plating thesubstrate by using the palladiumcatalyst as an activating catalyst.

GALVANIC FORMING OF BONDINGPADSUS. Patent 5,989,993. Nov. 23, 1999E. Zake et al., assignors to ElkeZakel, and Pac Tech PackagingTechnologies, GmbH, both ofGermany

A method for the preparation of atleast one bump structure of a sur­face of a substrate for bondingpurposes.

LOW·TOXICITY PAINT STRIPPERUS. Patent 5,990,062. Nov. 23, 1999S.R. Summerfield et aI., assignors toGage Products, Ferndale, Mich.

A paint-stripping compositioncomprising on a weight basis atleast 20% of benzyl alcohol or analkyl substituted benzyl alcohol; 5

Recovery and Refining ofPrecious Metals

ITy C. W. A rmnen328 pages $60.00

This book lise ~l very h~lSic approach co introduce thesubject of precious mctal rdinin~ from prim~lry ~lnd sec­ondary sources. \XI rking e:omples of recovery f cleanscrap, silver from sterling silver crap, and gold from"yellow gold" scrap are ~iven, using step-by-step proce­dures. Thi. book is a pLlCticll guide to recovering, test­ing, cxtracting, ,md refining precious metals.

end Orders to:METAL FINISHING

660 White Plains Rd.Tarrytown, NY 10591-5153

For bster service call(914) 333-2578

or FAX your order to(914) 333-2570

1\11 hook order' IllU\l he prep.ud. I'le.I\e Indude 55.00 ,hippin~ .\I1dh.1I1dlin~ for deli\'er\' "I cxh hook ,·j.1 UPS in Ihc l .. ,510.0 fore.lch hook shipped expre" 10 CUI.!'!.I: .1I1d s~o.o lor e.lch hook,h ipped expre" I" .111 'li her <"'1111 ric,.

November 2000

The most beautifulbook ever publishedin the field of metal finishing

The Coloring, Bronzing andPatination of MetalsIry R. Hughes and M. Rowe

372 pages 200 color illustrations $100.00

The ')" x 12" volume is in six sections: cast bronze, ca tyellow br.lss, wrought yellow brass, gilding metal, cop­per and copper plate, and silver and ilver plate.Beginning with a historical introduction, the authorsdescribe the basic techniques for surface preparation,

coloring chemicli application, and finishing.

Send Ord rs to:METAL FINISHING

660 White Plains Rd.,Tarrytown, Y 10591-5153

For faster service, call(914) 333-2578

or FAX your order to(914) 333-2570

All hook order, n1\"1 he prep.1id. PIe.1'e indude 55.00 shippin~ .1ndh.1l1lllin~ for deli"er)' of e.1Ch hook \'1:, lll' in tht U.s., 510.00 fore.,dl hook ,hipped exprc" 10 c'1I1.1d.l: .1I1d S~O.O (or each hookshipped expre" III .,11 olher cOlllllrie'.

107

to 30% of methylene chloride; 1 to10% of hydrogen peroxide; and 10to 60% of water.

RADIATION CURABLE COATINGSWITH IMPROVED WEATHERABILITYUS. Patent 5,990,188. Nov. 23,1999G.A. Patel et ai., assignors toGeneral Electric Co., Schenectady,NY

man~IIId IllWOlk faclIllleIIllIIIt reduce toxic emiI8IonI undIr ...teitWl....... <MnprIrClClllcllDn.....IIUt IIIIIt Of 8llCMd tile 1MMm........ besed on u.s. EM fraclIonII ......IIIIcIencr on boItl WIt IIld cIIr ........

• A1I'. _ 100 two stage system _Ihe(MIlCr) "ldeIines for~ paint boolha

Let tile ...... • All MIveJOUI' .... ...., co.u....

AUAir Technologies, Inc.

205 West 17th 51. (785) 242 1811Ottawa. KS 66067 fax (785) 242 8700

(800) 624-8739E-mail: ati@ati-filters.com

Website: www.ati-filters.com

Circle 089 on reader information card

108

A radiation-curable coating com­position comprising 5 to 50% silylacrylate modified colloidal silica.

COLORED METALLIC PAINTCOMPOSlnONUS. Patent 5,990,219. Nov. 23, 1999N. Sakai et al., assignors to BASFCoatings AG, Muenster-Hiltrup,Germany

A colored metallic paint composi­tion comprising a film formingbinder; 0.1 to 15 parts by weightof metallic powder; 0.1 to 10 partsof a first colored pigment; 0.5 to 50parts of a second colored pigmentwherein the primary particle sizeof the first colored pigment issmaller than the primary particlesize of the second colored pigmentand the first colored pigment andthe second colored pigment have acomplementary color relation­ship.

PROCESS FOR PICKLING STEELAND STAINLESS STEELUS. Patent 5,992,196. Nov. 30, 1999H. Giraud et al., assignors to Usinor,Puteaux, France

A continuous production line forproducing a strip of a rolled sheetof steel and in particular a rolledsheet of stainless steel comprisingin combination the means for sub­jecting the strip to in succession: amechanical treatment; a primarypickling; a transformation opera­tion; annealing operations; a finalpickling; and a finishing opera­tion.

ROTARY BRUSHUS. Patent 5,992,491. Nov. 23, 1999R. Audisio, assignor to BibielleS.PA, Italy

A system for producing a ring ofabrasive sheet elements fromwhich to form a rotary brush.

APPARATUS TO CLEAN GOLDPLATEUS. Patent 5,993,301. Nov. 30, 1999W. Kim et al., assignors to SamSung

Electronic Co., Ltd., Kyungki-do,Rep. of Korea

An apparatus to clean gold-platedcontact surfaces of printed circuitboards comprising a printed cir­cuit board guide comprising aguide rail to guide the printed cir­cuit boards; at least one cleaningunit to remove contaminants fromthe gold-plated contact surfacesthrough friction of the cleaningunit and the gold-plated contactsurfaces relative to the move­ments of the printed circuitboards on the length of the guiderail; and a base to support and fixthe cleaning unit and the printedcircuit board guide.

VACUUM TREATMENT SYSTEMUs. Patent 5,993,556. Nov. 30, 1999H. Maidhof et al., assignors toLeybold Systems CmgH, Hanau,Germany

A vacuum treatment system fordepositing a thin coating on a sub­strate, comprising a plurality ofstationary treating chambers thatare held by an annular or frameside wall of a vacuum chamber,each treatment chamber housingone or more treatment tools, andwherein each treatment chamberincludes an opening facing inwardtoward the center of the vacuumchamber permitting transfer ofthe substrate in and out of a lockand with a shaft or screw spindleextending parallel to the planes ofthe openings and mounted in avacuum chamber lid and/or in avacuum chamber.

CLEANING PAINT RESIDUESUS. Patent 5,993,561. Nov. 30, 19Y9C.P. ,Jarema, assignor to HenkelGorp., Gulph Mills, Pa.

A process for removing at leastpartially dried paint residuesfrom a surface bearing a coat ofsuch paint residues comprisingproviding a first liquid that isswellantlsolvent for the paint res­idues to be removed; a second liq-

Metal Finishing