Polyester-Polyurethane U.S. Patent 5569,797. Oct. 29, 1996 M B/urn and J. Petzoldt, assignors to Bayer AG, Leverkusen, Germany

An aqueous polyester-polyurethane dis- persion for use in coating compositions.

Conveyor System U.S. Patent 5570,639. Nov. 5, 1996 R.G. Hooper et al., assignors to FKI industries Inc., Fairfield, Corm.

An antirunaway apparatus and method for a power-and-free conveyor system.

Rotating Nozzle U.S. Patent 5,570,772. Nov. 5, 1996 G.J. Mathieus, Goldendale, Wash.

A rotating nozzle for use in cleaning or stripping a surface.

Vacuum Treatment Apparatus U.S. Patent5,577,331. Nov. 5, 1996 R. Schemer and P-R. Murak, assignors to Balzers AG, Liechtenstein

Vacuum treatment apparatus, compris- ing at least two chambers linked by a tran-

Circle 054 on reader information card

Composite Abrasive Filament U.S. Patent 5,571,296. Nov. 5, 7996 L.L. Barber, Jr et a/., assignors to 3M Co., St. Pau/, Minn.

A method of making a composite abra- sive filament comprising at least one pre- formed core at least partially coated with a hardened composition comprising a ther- moplastic elastomer and abrasive particles.

Dual-Cure Binder System U.S. Patent 5,577,297. Nov. 5, 1996 G.S. Swei et al., assignors to Norton Co., Worcester, Mass.

A process for the production of a coated abrasive comprising forming an abrasive layer on a backing material, said abrasive layer comprising abrasive grits and a bi- functional binder formulation, which com- prises a compound having at least one ra- diation-curable functionality and at least one thermally curable functionality per molecule; at least partially curing the radi- ation-curable functionality; and subse- quently completing the cure by activation of the thermally curable functionality.

Powder Coating Device U.S. Patent5,571,323. Nov. 5, 1996 R.J. Duffy and E. Sessa, assignors to Nylok Fastener Corp., MaComb, Mich.

A powder spray apparatus for the man- ufacture of coated fasteners.

dotary-Cup Coating Apparatus U.S. Patent 5,571,324. Nov. 5, 1996 H. Saga et al, assignors to Tokyo Ohka Kogyo Co. Ltd., Kanagawa, Japan

A rotary-cup coating apparatus for ap- plying a coating solution on a surface of a workpiece.

Continuous Hot Dipping Apparatus U.S. Patent 5,571,327. Nov. 5, 1996 T Ookouchi et al, assignors to Hitachi Ltd., Tokyo

A continuous hot dipping apparatus in- cluding at least one roll, which is supported by a bearing and rotates in a molten metal.

Hot-Dip Device U.S. Patent 5,571,328. Nov. 5, 1996 FR. New/and, assignor to National Steel Corp., Mishawaka, Ind.

A bearing support for submerged rolls in hot-dip coating operations.

sit opening, and a valve body pivotably linked within the opening.

Method for Removal of Surface Coatings U.S. Patent 5,571,335. Nov. 5, 1996 D.L. Lloyd, assignor to Co/d Jet Inc., Loveland, Ohio

A method of removing a surface coating from a substrate, comprising applying en- ergy to an area of impingement of the surface coating so as to elevate a tempera- ture of at least a portion of the surface coating within the area of impingement to a temperature at least as high as that required to pyrolyze the surface coating; and while the coating is at a temperature above that required to pyrolyze, impinging the area with cryogenic particles.

Solution for Cleaning Aluminum U.S. Patent 5,571,336. Nov. 5, 1996 S.R. Wurzburger, Goodyear Bar, Calif. and J.M. Over/on, Yuba City, Calif.

A method for cleaning an aluminum sur- face, comprising adding a concentrate of sul- furic acid to water to produce a solution having a concentration of lO-20% acid in water by volume; adding calcium oxide or calcium hydroxide to the sulfuric acid solu- tion in a predetermined amount to form a calcium sulfate solution and to raise the pH to a value in the range of 12.8-13.1; passing the calcium sulfate solution through a filter to remove calcium sulfate particles; producing a solution concentrate comprising adding an alkali hydroxide to said calcium sulfate solu- tion in a predetermined amount to raise the pH to a value between 13.8-14; producing a cleaning solution comprising mixing said so- lution concentrate with water in an amount of about 1.5 parts solution concentrate to 85 parts of water by volume; applying the clean- ing solution to the aluminum surface; allow- ing the cleaning solution to remain in contact for a predetermined period of time; and rins- ing.

Brush Plating Apparatus U.S. Patent 5571,389. Nov. 5, 1996 PK. Kerampran, assignor to Dalic, Vifre, France

A device for localized electrochemical treatment of a conducting substrate by movement of the device over the substrate.

Hot-Dip Coated Steel U.S. Patent 5,571,566. Nov. 5, 1996 N-G. Cho, assignor to Union Steel Mfg. Co. Ltd., Pusan, Republic of Korea

A method of manufacturing a coated steel plate comprising contacting a steel plate with a molten coating composition comprising 55% aluminum, 43.3% zinc, 1.6% silicon, and a percentage by weight of titanium. /

70 METAL FINISHING . JULY 1997