to cause substantial curing of the resin dur- ing extrusion, and a sufficient amount of the same or different low-temperature cur- ing agent in powder form to complete the curing of the resin onto a surface of the wood to a thickness of 3 to 6 mils, and curing the powder at a temperature from 180°F up to but not including the decom- position temperature of the blend.

Precisely Shaped Abrasive Composite U.S. Patent 5,714,259. Feb. 3, 1998 G.L. Holmes et al, assignors to 3M Co., St. Paul, M-m.

A discrete, precisely shaped abrasive composite comprising 20 to 75% by weight of a plurality of abrasive grits; and a binder formed from an addition-polymerizable binder precursor wherein the discrete abra- sive composite has no dimension greater than 2,500 micrometers.

Aqueous Powder Coating U.S. Patent 5,714,264. Feb. 3, 1998 L. Sacharski et al., assignor to BASF Lacke & Farben AG, Muenster-Hit&up, Germany

An aqueous powder coating dispersion for packaging containers, which comprises a powder coating with at least one epoxy resin and at least one compound selected from the group consisting of phenolic cur- ing agents and an aqueous component, that contains at least one nonionic or anionic thickener.

Waterborne Coating U.S. Patent 5,774,549. Feb. 3, 1998 K.J. Wu and R. Quinn, assignors to Cflec Technology Corp., Wilmington, Del.

A waterborne coating composition com- prising an aqueous medium having sub- stantially homogeneously dispersed therein a reactive resin component comprising an active hydrogen-containing surface active resin, which possesses sufficient anionic hydrophilizing functionality to render the active hydrogen-containing surface active resin water dispersible; and a crosslinker component comprising a lJ&triazine car- bamate crosslinker.

Oscillating Blast Cleaner U.S. Patent 5,716,261. Feb. 10, 1998 R.B. Watkin, assignor to The Wheelabrator Corp., LaGrange, Ga.

A blast cleaning apparatus comprising a blast unit for projecting abrasive cleaner towards the surface; a housing for contain- ing the blast unit; a carriage for supporting the housing for movement on the surface in a vertical direction and including a rail for supporting the housing for traversing movement in a horizontal direction with respect to the carriage; and means for

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mounting the housing for movement along the rail, whereby the means for mounting permits the housing to be disengaged from the rail when the housing is lifted in a

Cleaning Process U.S. Patent 5.716,457. Feb. 10, 1998 ME. Hayes et al., awgnors to Petroferm Inc., Fernandina Beach, F/a.

vertical direction.

Pickling Apparatus U.S. Patent 5,716,4X Feb. to, 1998 M. Zednicek et a/., assignors to Andritz- Parentvenualtungs-GmbH, Graz, Austria

A process for continuous surface treat- ment of a metal strip in a treatment cham- ber where the strip runs through a bath of pickling liquid, so as to create a nominal shear force between the surface to be treated and the liquid in the bath, while pickling liquid is fed to the chamber.

A proccsq for removing soil from a sub- strate in a cleaning environment, which comprises a boiling liquid cleaning compo- sition that has a vapor space above it and consists essentially of a solvating agent having a room-temperature vapor pressure of no greater than 8 mm Hg and a solvating strength of no less than 10; and a rinsing agent having a room temperature vapor pressure of 80 to 760 mm Hg and an ozone depletion factor of no greater than 0.15; wherein the composition boils at a rela- tively constant temperature, and the rinsing

METAL FINISHING l AUGUST 1998 77

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agent has a higher specific gravity than that of the solvating agent.

Vapor Degreasing Method US. Patenf 5,716,458. Feb. 10, 1998 K. Machino, assignor to Nikon Corp., Tokyo

A method for washing and drying an article comprising providing an azeotropic liquid in a tank, said azeotropic liquid con- taining water and an alcohol having one to six carbon atoms: providing an article in the tank disposed above a surface level of the azeotropic liquid; heating the azeotro- pit liquid for producing a vapor to wash the article; maintaining the vapor to have a temperature of not more than 100°C during the heating step; and drying the article.

Sputtering Apparatus U.S. Patent 5,716,505. Feb. 10, 1996 M. Scherer, assignor to Balzers Prozess-Systems GmbH, Hanau, Germany

An apparatus for coating substrates by cathode sputtering with a hollow target.

Device for Electrolytic Surface Coating U.S. Patent 5,716,509. Feb. 10. 1996 R. Kamm, assignor to Ecograph AG, Weesen, Switzerland

A process for electrolytic surface coat- ing of an electrically conductive workpiece by means of a fluid electrolyte conveying the electrolyte in a controlled circuit into an

electrolysis tank and into and around an electrolysis region in the electrolysis tank, the electrolysis region being defined by an anode and a cathodically connected work- piece, the electrolysis tank having an over- flow region through which electrolyte can flow from the electrolysis region and into an overflow tank, the anode having a first side closest to the workpiece and a second side farthest from the workpiece, a greater portion of the electrolyte being conveyed in a first stream from a first inlet at a higher flow rate into a space between the cathodi- caliy connected workpiece and the anode, the first stream flowing adjacent to and generally parallel to the first side of the anode and flowing toward and into the overflow region, a lesser proportion of the electrolyte being conveyed in a second stream from a second inlet at a lower flow rate, the second stream flowing adjacent to and generally parallel to the second side of the anode and tlowing toward and into the overflow region; removing the electrolyte into the overflow tank once the electrolyte has passed through the electrolysis region and the overflow region; separating anode sludge from the electrolyte in the overtlow tank; and feeding the electrolyte back from the overflow tank into and around the elec- trolysis region.

Anodizing Electrolyte U.S. Patent 5,716,511. Feb. IO, 1998 B.J. Melody et a/., assignors to Kemet Electronics Corp., Greenville, S. C.

A process for anodizing a valve metal comprising conducting the anodization at a temperature below 50°C in an aqueous electrolyte containing a polyethylene gly- co1 dimethyl ether having from 4 to IO repeating ethylene oxide units and phos- phoric acid or an electrolyte-soluble salt thereof, said electrolyte having a resistivity below about 5,000 ohm cm at 30°C.

Paint Spraying with Compressed Fluids U.S. Patent 5,716,558. Feb. IO, 1998 K.A. Nielsen ef a/., assignors to Union Carbide Chemicals & Plastics Technology Corp., Danbow Corm.

A method for producing coating pow- ders, catalysts, and drier waterborne coat- ings by spraying compositions with com- pressed fluids.

Protective Coatings for Polyimide Composites U.S. Patenf 5,716,677. Feb. 10, 1996 A.M. lwazany and SG. Prybya, assignors to Ohio Aerospace Institute, Brook Park, Ohio

A method of protecting a polyimide ma- trix article against oxidation comprising synthesizing a coating solution by reacting an aromatic dianhydride with an aromatic

78 METAL FINISHING l AUGUST 1998