deposited on the substrate, having a thick ness of between 10 and 500, and compris- ing chromium, chromium oxide, and a complex represented by the formula Al,N- ,,O&; and a second layer of metal depos- ited on the fit layer.

Abrasive Tool U.S. Patent 5,383,309. Jan. 24, 1995 6. Sarn@trc, assignor to Norton Co., Worcesier, Mass.

An abrasive tool comprising an abrasive containing layer, a flexible support having a layer of abrasive particles bonded thereto, a fabric substrate adapted for hook and loop attachment to a support plate, and a resilient foamed polyurethane layer having a density between 20 and 30 kg/m located between and adhered to the abrasive con mining layer and the fabric substrate.

Ultrasonic Cleaning Apparatus U.S. Patent 5,393,453. Jan. 24, 1995 y: shibano, 7cJfyo

An apparatus for ultrasonically cleaning and deburring a workpiece, comprising a cleaning station for holding a workpiece; means for supplying cleaning solution from a solution reservoir to the workpiece; a spray gun connected to a downstream end of the cleaning solution supply passage; means disposed in the solution retaining chamber of the spray gun for radiating ultrasonic energy into the cleaning solution to cavitate the cleaning solution in said chamber, whereby a cavitated cleaning so- lution is supplied to the workpiece through the nozzle opening and the work piece is cleaned and deburred by the cavitated cleaning solution; and means for deaerating the cleaning solution.

Megasonic Cleaning System U.S. f’atent5,393,494. Jan. 24, 1995 H.K. Thomas et al., ass@crs to CM Inc., Wilmington, Del.

A static megasonic cleaning system for cleaning a plurality of objects having an exterior surface and a major plane, corn prising a cassetteless vessel having an in- ternal cavity for receiving the plurality of objects and for receiving a fluid; and an array of megasonic transducers mounted on the vessel outwardly of the internal surface, each transducer emitting a focused beam of megasonic energy into the cavity, the plu- rality of transducers being arranged so that the emitted beams extend generally parallel to the major plane of the objects and col- lectively envelop the entire exterior surface of each object.

Sputtering Apparatus U.S. Patent 5394,027. Jan. 24, 1995 M.J. Thwaifes, assignor to The BOC Group p/c, Wind/es/m, England

An apparatus for sputtering coatings of material onto a substrate from a chamber subject to evacuation during use, which comprises a substantially cylindrical target tube having on a surface thereof the mate- rial to be sputtered; means for rotating the target tube about its longitudinal axis; pri- mary magnetic means for assisting the sputtering process by the provision of a magnetic field in a sputtering zone associ ated with the target tube, means for moving the substrate through the chamber and into the sputtering zone; and means for intro ducing an ionizable gas and a reactive gas into the chamber in the vicinity of the sputtering zone; wherein supplementary magnetic means are provided to form a

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Galvanizing Process and Apparatus U.S. Patenr5,384,165. ./an. 24, 1995 IA. Sellitto, assignor to SMS Engineering Inc., Pittsburgh

A method of coating a ferrous substrate with zinc, including introducing the sub strate to a coating chamber having an inert atmosphere therein, electrostatically depos iting a layer of zinc powder on the sub strate; liquefying the zinc powder on the substrate; reflowing the liquid zinc on the substrate to create a zinc-iron alloy inter face; and cooling the substrate and the re- flowed zinc coating thereon below the liq- uidous temperature of the zinc in an inert atmosphere.

Method for Monitoring Electroless Plating Baths U.S. Patent 5,394,153. Jan. 24, 1995 A.J. Grady et al., assignors to AT&T Corp., Murray Hi//, N. J.

A method of monitoring the effective ness of solutions used in plating articles comprising applying the solutions to a specimen, which permits light to be trans mitted therethrough, and while the speci men is being plated, measuring the level of light transmission therethrough and deter mining a time ht which light transmission decreases to a particular value based on a curve of the decrease in light transmission as a function of time.

System for Making Bright Aluminum Parts U.S. Patent 5384,161. Jan. 24, 1995 R.C. Eisfebr and J. C/ark, assignors to Davidson Textron Inc., Dover, N.H.

A process for manufacturing an alumi num part comprising providing an alumi num base; chemically combining the alu minum base with chromium to form a chro- mate conversion coating layer, spray de- positing and curing a primer coat on the chromate conversion coating layer, said primer coat being a polyurethane material and having a thickness of 0.1 to 2.0 mils; thereafter spray depositing and curing a basecoat on the primer coat to form a di- electric barrier, said basecoat being a poly- urethane material and having a thick ness of 0.1 to 2.0 mils; vacuum depositing in- dium to form a film having a thickness of 25 to 2000 covering the basecoat including a plurality of discrete islands of the indium appearing macroscopically as a continuous film and having a plurality of macroscopi tally unobservable channels between the islands to maintain the film electrically nonconductive over the basecoat; and spray depositing and curing a layer of clear res- inous protective dielectric topcoat to com- pletely cover the vacuum deposited indium film whereby the channels are filled for bonding the indium film to the basecoat.

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