of; and then forming a second electro- formed layer on a back side of the first layer with a substantial amount of a second surface active agent to form a back side of the shell. such that the second electro- formed layer forms with hollow portions therein, which.are aligned with the straight pores on the first layer.

Plated Vehicle Wheel U.S. Pafenf5,728,426. Mar. 17, 1998 DC. Wei, assignor to Hayes Wheels lnternafional Inc., Romulus, Mich

A process for forming a layer of metal

plating on the surface of a vehicle uheel comprising providing a vehicle wheel includ- ing an annular wheel rim defining a wheel rim surface, the wheel rim having annular outboard and inboard tire bead seats formed therein for supporting outboard and inboard tire walls, respectively, the wheel rim having a circular wheel disk disposed thereacross and defining a wheel disk surface; and pro- viding a layer of metal plating on a portion of at least one of the wheel rim surface and the wheel disk surface. said portion excluding a portion of at least one of the tire bead seats.

Method for Replenishment of Electroless Gold U.S. Pafent5,728,433. Mar. 17, 1998 T-J. Cheng and D.8. Shields, assignors to Engelhard Corp., /se/in, N.J.

A method for replenishing an electroless gold plating bath comprising dissolving metallic gold into the bath.

Photoresist Stripping Composition U.S. Patent 5,728,664. Mar. 17, 1998 F W. Michelofti, ass/gnor to Ash/and Inc.

A nonaqueous, naphthalene-free, nega- tive photoresist stripping composition con- sisting essentially of 40 to 80% by weight of an aromatic hydrocarbon solvent; 5 to 20% of a surfactant consisting essentially of a linear monoalkylbenzene sulfonic acid; I to 10% of a dialkylbenzenesulfonic acid; and 5 to 20% of an alkyl phenol.

Powder Coating U.S. Patent 5728,789. Mar. 17, 1998 C. Wamprecht et a/., assignors to Bayer AG, Lever&en, Germany

A powder coating composition contain- ing copolymers having hydroxyl and car- boxylic acid anhydride groups as binders.

Powder Paint U.S. Pafenf 5,728,790. Mar. 17, 1998 M. Seki ef al., assignors to Mifsui Joafsu Chemicals Inc., Tokyo

A thermosetting powder paint corn-

prising a copolymer; an aliphatic poly- carboxylic acid; a linear anhydride of an aliphatic polycarboxylic acid; and a salt between a tertiary amine cornpound and an organic acid. and/or a tertiary amine compound.

Automatic Cleaning Apparatus U.S. Patent 5,730,163. Mar. 24, 1998 0. Meyer and K-H. Wueler, assignors to Dijrr Ecoclean GmbH, Fildersfadt, Germany

An automatically operating cleaning installation for removing machining res- idues from workpieces comprising a cleaning station having associated there- with a channel for receiving at least one workpiece to be cleaned; a workpiece transportation device; and at least one blow nozzle directed into the interior of the channel.

Abrasive Medium U.S. Pafenf 5,730,645. Mar. 24, 1998 J. Park, Glendale. Calif

A hard-coated abrasiv,e medium with se- lected density.

Oscillating Blast Cleaner U.S. Patent 5,730,646. Mar. 24, 1998 R.S. Watkin, assignor to U.S. Filter Corp., Palm Desert, Cafif.

A blasting apparatus for cleaning a hor- izontal or inclined surface.

Coated Abrasive U.S. Patent 5,730,764. Mar. 24, 1998 S. E. Williamson, Chamblee, Ga. and RR. Kemmerer, Marieffa, Ga.

A coated abrasive system employing ionizing irradiation cured epoxy resins as binder.

Passivate for Tungsten Alloy Electroplating U.S. Patent 5,730,809. Mar. 24, 1998 R. Jremmel, assignor to Enfhone-OMI Inc., Warren, M,ch.

A method for passivating tungsten alloy electroplate comprising contacting with a passivating quantity of 00, in an aqueous bath solution having a pH of frotn 4.5 to 7.5, wherein the bath includes from I.8 to

ltes

c 3

Call for a price, get a quote by fax in 30 minutes! P

1 Fast Service

7 F

Call for a technician, get service questions answered over the phone.

RECTIFIERS G REVERSING SWITCHES 3 RHEOSTATS

t

. Parts overnight l Complete service records covering 1951 thru 1995 . Field service nationwide l Fast delivery

Why wait when you can get it first from us?

k CLINTON POWER 611 Landwehr Road, Northbrook, IL 60062 Phone: 647-498-4200 l Fax: 847-498-9944

Circle 023 on reader information card

METAL FINISHING . SEPTEMBER 1998 91