Abstract: A method of adjusting coating weight of a coating material with high accuracy within a wide range of operation, by setting and using a relational formula for determining a coating weight W of the coating material separately in accordance with relative relation between a nozzle-strip distance D and a nozzle slit clearance B. The adjustment of the coating weight of molten metal (coating material) is performed by controlling a nozzle pressure P and a strip speed V, and also by controlling D by equation (1) in the range of D/B.ltoreq.C (developing range) and at least one of D and B by equation (2) in the range of D/B>C (fully developed range). (.rho..sub.M =molten metal density, .mu.=molten metal viscosity, P.sub.A =pressure at nozzle outlet, .eta.=nozzle efficiency, K=ratio of specific heat of gas, and h.sub.1 and h.sub.2 =constants)W=h.sub.1 .times..rho..sub.M .times.{(K-1)/(2.times..eta..times.K.times.P.sub.A)}.sup.1/2 .times.D.sup.1/2 .times.[.mu..times.V/{(P/P.sub.A).sup.(K-1)/K -1}].sup.1/2(1)W=h.sub.2 .

Abstract: Process and system for protecting an oxidizable material against oxidation.The process according to the invention consists of forming a gas-permeable body (1) having open pores (28), a first surface (2) intended to come into contact with an oxidizing gaseous flow (4) liable to oxidize the body and a second surface (6) opposite to the first surface and injecting an oxygen-free protective gas (8) through the second surface (6) leading to disturbances in the material giving it a protection against oxidation.

Abstract: Method and apparatus for meniscus coating one or two sides of steel strip with a metal or metal alloy. The apparatus includes a horizontally disposed coating tray for containing molten coating metal, gas heaters for maintaining the temperature of the coating metal above the melting point of the coating metal, stabilizing rollers for moving steel strip transversely past a departure lip positioned on one side of the coating tray and adding solid or molten metal to the coating tray for maintaining the level of the coating metal in the coating tray relative to the upper elevation of the departure lip so that an uninterrupted flow of the coating metal can be delivered over the departure lip to a surface of the strip. The coating tray may be rotatably mounted for adjusting the level of molten metal in the coating tray. The coating tray also may include a sled for lateral displacement for positioning the departure lip a predetermined distance away from the strip.

Abstract: There is provided an apparatus for producing a magnetic recording medium which enables a good-quality magnetic recording medium to be produced with an improved production efficiency.

Abstract: Method and apparatus for meniscus coating one or two sides of steel strip with a metal or metal alloy. The apparatus includes a horizontally disposed coating tray for containing molten coating metal, means for maintaining the temperature of the coating metal above the melting point of the coating metal, means for moving steel strip transversely past a departure lip positioned on one side of the coating tray and means for maintaining the level of the coating metal in the coating tray relative to the upper elevation of the departure lip so that an uninterrupted flow of the coating metal can be delivered over the departure lip to a surface of the strip. The coating tray may be rotatably mounted for adjusting the level of molten metal in the coating tray. The coating tray also may include means for lateral displacement for positioning the departure lip a predetermined distance away from the strip.

Abstract: A method for controlling coating weight on a hot-dipped steel strip comprises the steps of positioning at least one pair of high-frequency (alternating) current conducting paths near one side of a steel strip and near another side of the steel strip drawn out of a coating bath, each of the high-frequency (alternating) current conducting paths being parallel with a surface of the steel strip above the coating bath, and flowing a-high-frequency (alternating) current strong enough to magnetically saturate the steel strip through the at least one pair of high-frequency (alternating) current conducting paths to induce a high-frequency (alternating) current of an opposite phase in the steel strip, a magnetic pressure acting on surfaces of the steel strip being generated by an interaction of the induced high-frequency (alternating) current with a high-frequency (alternating) current of the high-frequency (alternating) current conducting paths.

Abstract: Method for providing a patterned thin film on a flexible web-like substrate having at least one surface. A patterned release coating which carries the desired pattern is deposited on the surface and has openings therein through which the surface of the substrate is exposed. A thin film is deposited over the patterned release coat and onto the portions of the surface exposed through the openings. The patterned release coating is then removed and the thin film portions carried thereby to provide a patterned thin film on the substrate.

Abstract: A jet stripping apparatus comprises a stripping nozzle positioned to direct a stripping gas jet stream (11) against each side of a steel strip (7) emerging from a bath (8) of molten zinc or aluminium/zinc alloy with a layer (9) of bath material thereon, means to supply gas to said stripping nozzle at a pressure sufficient to liberate a relatively strong stripping jet stream (11) therefrom, and surface modifying means spaced closely below said stripping nozzle effective to smooth the surface of said layer (9) prior to it reaching the stripping jet stream (11). Said surface modifying means preferably comprise a smoothing nozzle positioned to direct a relatively weak surface modifying gas jet stream (18) against the layer (9) that is effective to smooth the layer but not to substantially affect the quantity of material passing it.

Abstract: The invention relates to a device for blowing off excessive coating material, especially fluid zinc or aluminium, in the coating of metal bands. The device comprises a blowing off jet impinged on compressed air, of which the jet bodies 3,4 are fixed at a base body 1. The jet lips 3,4 adjustable against each other form a jet slit 10 extending in transverse direction of the metal band. For optimizing an adaption of the slit thickness respectively the pressure of the blowing off medium along the band width it is provided to build the blowing off jet as a jet row, providing in transverse direction of the band at least two partial jets 2 to impinge seperately on a blowing off medium, especially compressed air, sealed against each other, of which the respective partial slits are adjacent forming a continuous jet slit (10).

Abstract: A device for regulating the thickness of a metal deposit formed on a strip emerging from a galvanization bath, comprising at least one nozzle for blowing air provided between the opposite, narrowly spaced ends of two jars. The air knife forming slot is delimited by two flat, parallel faces defining the direction of the air blade, one of these faces being provided on a deformable lip extending inside a hollow provided at the end of a first jaw and being slidable along a flat retaining face substantially perpendicular to the direction of the air knife and deforming the flat face by the action of an arrangement to adjust the width of the slot.

Abstract: A method of molten metal plating, comprising the steps of: bringing a travelling steel strip into contact with a revolving roll; applying a molten metal on the roll through a nozzle disposed near the roll; and transferring the applied molten metal from the roll to the steel strip by the revolution of the roll. An apparatus for molten metal plating, comprising: a coating roll capable of being brought into contact with a travelling steel strip; a nozzle disposed near said roll for applying a molten metal on said roll; and means for supplying a molten metal to said nozzle.

Abstract: A flexible circuit 10 panel is coated with solder by lowering into a bath of molten solder 4. On removal from the bath excess solder is blown from the panel by air jets from one or more nozzles 22. The panel is pulled towards the nozzle by a region 60 of negative pressure associated with the nozzles, and is held close to the nozzles to obtain an even coating of solder.

Abstract: A method of producing a coated magnetic recording medium includes a step of coating a nonmagnetic substrate with a magnetic paste layer mainly composed of acicular or granular magnetic particles and a resin binder, a spontaneous drying step for a specific period for inducing leveling of the coated surface and spontaneous volatilization of solvent without applying a magnetic field from outside after coating the magnetic paint, a first orientation step for dissipating the aggregated particles by a sudden change in magnetic field while inducing magnetic moment in magnetic particles by a strong DC magnetic field inside the coated surface and in a longitudinal direction of the medium for arraying the magnetic particles in the coated surface in the longitudinal direction, and a succeeding second orientation step for suppressing the magnetic repulsive force among the particles while arraying the magnetic particles by a DC magnetic field in the coated surface in the longitudinal direction.

Abstract: An apparatus and process for maintaining the purity of solid/granular product and dispensing high purity granular product from a vessel. A noncontaminating surface is provided by a cup, cylinder, or other structure having a surface of silicon, silicon carbide, silicon nitride, sialon, or similar materials and preferably operates as an angle of repose valve in a pressurized system to prevent contamination by undue contact of the high purity product with conventional gastight valves such as ball valves, butterfly valves, pinch valves, etc.

Abstract: In a method for manufacturing a functional thin film by a vacuum evaporation method, during a thin film containing a material is evaporation-deposited on a substrate, a gas flow controls orientation of the material in a manner that the gas flow substantially intersects direction of flow of vapor of said material onto the substrate.

Abstract: An apparatus for injecting two fluids is provided with a first elongated header which extends in a straight line and is supplied with a first fluid, a second elongated header which extends along the first header and is fixed to the backside of the first header, a nozzle lead-in member for leading the first fluid from the first header and the second fluid from the second header, and a nozzle for mixing and injecting the fluids from the nozzle lead-in member. Such apparatus for injecting two fluids has a simple construction and can be produced efficiently.

Abstract: In the gas jet wiping of galvanized wire strip or tube the gas jet wiping nozzle and, preferably a reactive gas containment vessel used for modifying the surface coating on the wire, are made in two or more non-annular parts which when abutted together form an annulus. The parts may be releasably held together in their abutted annular form until the wire, strip or tube requires to be rethreaded, then the parts can be separated from one another transversely of the direction of travel of the wire, strip or tube through the nozzle or containment vessel. The threading of the wire, strip or tube through an annular nozzle or containment vessel is thereby avoided.

Abstract: The surface quality and luster of galvanized wire produced by the gas jet wiping method and cooled by jets of a cooling fluid may be improved by exposing the wire to a reactive gas atmosphere containing sulphide or chloride radicals after the wire has passed through the gas jet wiping nozzle and before it is contacted by the cooling fluid. The wire is exposed to the reactive gas atmosphere for a sufficient length of time to form a protective surface coating of metal sulphide or chloride.

Abstract: An inventive method may perform a plating the surface of the metals sheet without using a molten plating metal. This method successively melts a supplied solidus plating metal in close proximity of the passing metal sheet and adheres the molten plating metal as a plating film to the surface of the metal sheet, where the metal sheet passes upwardly and the plating metal is supplied through an upwardly-directed nozzle disposed near the passing sheet, and when or immediately before the plating metal is supplied from the nozzle, it is molten by a heat melting means. The molten plating metal forms a pool at a corner defined between the surface of the passing sheet and the tip of the nozzle, and the molten metal of the pool forms a plating adheres to the sheet surface and forms the plating film.

Abstract: For stripping sheet metal coated in a galvanizing or vitreous-coating installation directly after the coated sheet has left a bath of molten coating material, both sides of the sheet are blasted with a thin curtain of gas. For this purpose a gas is used which is significantly heavier than air and is recirculated, the gas being for example sulfur hexafluoride or a mixture containing this gas.

Abstract: Apparatus and method for controlling and leaving different thickness coatings on a continuous web. A jet finishing assembly includes a support means and at least two rotatably mounted jet finishing knives. The orifice opening of each knife is a different height corresponding to a different thickness coating to be left on the web. When the coating thickness requirement for the web changes, the finishing knives are rotated until a knife having the appropriate orifice opening for leaving the required coating thickness is adjacent the passing web.

Abstract: A method of manufacturing an amorphous-metal-coated structure having a base material and an amorphous metal coating layer which coats the base material includes a step of applying a high energy rate forming treatment to both the base material and an amorphous metal disposed on the surface of the base material in such a manner that the amorphous metal is firmly bonded to the surface of the base material in the form of a coating layer. In the amorphous-metal-coated structure manufactured by this method, the amorphous metal and the metal constituting the base material are forced to protrude into each other at the bonding interface, and thereby the amorphous metal coating layer is firmly bonded to the base material by means of the metallic binding force. The amorphous metal-coated article may be employed as a member for a torque sensor.

Abstract: The invention relates to a process for manufacturing a strip of hot galvanized sheet steel devoid of a coating of pure Zn or a coating based on Zn on at least one side of the strip, comprising passing the strip continuously in a conventional dipping galvanization bath, wiping by pneumatic means a part of the coating of liquid Zn deposited on the strip, and subjecting at least one side of the strip to a mechanical action for completely eliminating the coating based on zinc which is not alloyed to the iron, by allowing to subsist only a thin iron-zinc alloy layer, said mechanical action on the layer of coating based on zinc which is still liquid being exerted by means of a brush at least the bristles of which are energetically cooled. The invention also provides a cooled brushing device (10) for carrying out the process.

Abstract: A differentially coated, galvanized steel strip is produced by hot dip coating both sides of a steel strip and adjusting the weight of coating metal on opposite sides of the strip to produce a light coated side and a heavy coated side. The strip is then precooled to fully solidify the heavy coated side following which the galvanized strip is subjected to a treating step in which simultaneously the light coated side is heated and the heavy coated side is cooled. This fully transforms the light coated side to iron-zinc alloy throughout while only partially transforming an inner layer on the heavy coated side to iron-zinc alloy. The outer layer on the heavy coated side consists entirely of coating metal, and there are no intermittent bleed-throughs of iron-zinc alloy to the outer surface of the heavy coated side.

Abstract: Clamp-like guides are arranged in the interior of a soldering bath container at a distance from each other and distributed across the width of the soldering bath container. Each guide has two guide rods which are spaced from each other by a certain distance and which are connected with each other at their lower ends. The upper final sections of the guide rods project upward from a soldering bath and have deflections at their upper ends which form a narrowing therebetween. The final sections can be elastically deflectable and are supported by support springs. Above the guides, two blast nozzles extend across the width of the soldering bath container and direct hot air jets against the surfaces of printed circuit boards leaving the soldering bath. The width of the narrowing is somewhat larger than the thickness of the printed circuit boards.

Abstract: A method for selectively depositing a composite material over high-thermal-conductivity areas (such as silicon) and not over low-thermal-conductivity areas (such as oxide), which does not require any additional patterning step. A composite material, such as TiW is deposited overall by sputtering. A short pulse of light is then applied, and the composite material over the oxide separates and flakes off, while the composite material over the high-thermal-conductivity area remains in place.

Abstract: A hardened and chrome plated steel roller is shot-blasted with sharp-edged particles (e.g. of 300-400 mesh) to provide sharp-edged recesses on the roll surface, and then shot-blasted a second time with steel balls (e.g. of 30-40 microns) to round the sharp edges of the recesses, to provide a smooth, but low luster, surface.

Abstract: A method and apparatus are disclosed for reducing spangle in a galvanization system that utilizes air knives to control coating thickness and distribution. Cooling nozzles are located downstream of the air knives along the feed path of the substrate being coated. The cooling nozzles direct an air and water mixture against the substrate at approximately the location the air from the air knives impinge the substrate. The air from the air knives force the air and water mixture to be carried along the substrate surface in a direction of the substrate feed path.

Abstract: The application discloses a method of terne coating, and a terne coated product, wherein the tin content of the terne is substantially lower than in conventional terne, without the need for other alloying elements in substitution for tin, such as zinc, antimony, silver, and phosphorus. The tin content of the terne bath is lowered below conventional percentages, to between about 2% and about 6.5% and the terne coated product, upon emerging from the coating bath, is jet finished. Such a terne coat has improved solderability and appearance with no change in pinhole frequency. Coating weight control is easier than with a terne coat having 7% or more tin in the bath.

Abstract: The metallic strip is displaced in a non-oxidizing gaseous atmosphere above and at a small distance from the surface of the coating bath and in contact with a coating cylinder driven to rotate in a direction opposite the direction of travel of the strip, so as to transfer onto the lower surface of the strip a thick layer of the coating material. Apparatus is arranged downstream of the coating cylinder to produce a jet of non-oxidizing gas directed to extend over the entire width of the strip, so as to adjust to a predetermined value the thickness of the coating layer.

Abstract: A hot dip galvanized steel strip in which the zinc based alloy coating exhibits a satisfactory appearance and is firmly fixed to the strip substrate, which strip is produced by a process which comprises coating at least one surface of a steel strip with a melted zinc based alloy controlling the weight of the melted zinc based alloy coating and; solidifying the melted zinc based alloy coating and which process is characterized in that the zinc based alloy contains 0.1 to 2.0% by weight of magnesium and in at least a portion of a stage in which the melted zinc based alloy coating is still in the fluid state, the zinc based alloy coating is exposed to an oxygen-controlled atmosphere containing 1000 ppm or less of molecular oxygen, the controlling procedure for the weight of the melted zinc based alloy coating being carried out in the oxygen-controlled atmosphere.

Abstract: This invention is concerned with a process for applying a protecting silicon-containing coating on a superalloy. The invention further concerns the thus obtained specimens having a protective coating.

Abstract: Metallic articles, for instance, ferrous strips are metallized, for instance, zinc coated by passing the heated article through a coating chamber and applying thereto a continuous stream of the molten coating metal so as to uniformly and evenly metallize said article. Thereafter, excess molten coating metal is removed from the coated article by hot gas blasting and the hot gas blasted article leaving the coating chamber is immediately cooled. Wiping means may be provided before applying the molten coating metal so as to deflect any molten coating metal dropping from the metallic article passing therethrough, while rollers may be arranged between the coating metal applying means and the hot gas blasting means. Said rollers serve to remove the major part of excess coating metal from the coated metallic article and to stabilize movement of the metallic article passing through the coating chamber.

Abstract: An improved air knife apparatus and method for controlling coating thickness on a moving metal strip. Air flow from blowers is supplied through a plenum chamber common to an air knife and a diffuser spaced along the path of strip travel. A valve between the plenum chamber and diffuser controls the relative flow of air through the knife and diffuser to establish the desired pressure and flow at the air knife to modify the thickness of the coating on the strip. The flow through the diffuser is directed against the strip at a location subsequent to the knife in the direction of strip travel, to chill the coating.

Abstract: A gas wiping die for wiping wire issuing from a molten metal coating bath is provided with critical parameters with respect to the die angle, the length and thickness of the die orifice and the relationship of the sides of the orifice, the throat diameter of the die and the height above the molten bath surface. The thickness of molten coatings on wire wiped with the combined die can be very accurately controlled by changes in wiping gas pressure.

Abstract: A finishing method and apparatus for conventional continuous hot-dip coating of the type wherein a ferrous base metal strip is caused to pass beneath the surface of a coating bath of molten coating metal and is thereafter subjected to jet finishing, the ferrous base metal strip having been appropriately pretreated so as to be at the proper coating temperature and so as to have its surfaces oxide-free when passing through the bath of molten coating metal. The method comprises the steps of providing an enclosure for the two-side coated strip as it exits the coating bath, locating a finishing jet nozzle to either side of the coated strip within the enclosure, jet finishing the coated strip with a non-oxidizing or inert gas. The apparatus comprises the above mentioned enclosure with the jet finishing nozzles located therein and an appropriate system to provide a non-oxidizing or inert atmosphere within the enclosure.

Abstract: A surface protection for a hot-tinning system or soldering system particularly useful for the air jets of the system characterized by the surfaces of the parts, which come into contact with the solder during the process, being provided with a non-metallic, heat resistant layer. The layer, which preferably has a thickness range of between 0.2 and 0.4 mm, may be an Al.sub.2 O.sub.3 ceramic layer, which is preferably applied by a plasma spraying process, or may be a polytetrafluoroethylene coating. It is further desireable that the surface, which is to be protected by the heat resistant layer, is provided as a sand blasted surface which has been provided with an adhesion layer consisting of Ni-Mo-Al alloy.

Abstract: An improved nozzle structure for directing a wide, thin jet stream of a gaseous medium from an outlet nozzle opening onto the surface of a running length of a flexible substrate or strip emerging from a liquid coating bath provides more accurate control of the thickness and the distribution of the coating liquid. The nozzle structure has a plurality of elongated, parallel plenum chambers each having its length dimension extending transversely of and being at least substantially as great as the width of the strip being coated. Gaseous fluid is supplied under pressure to the nozzle structure through a plurality of inlet openings spaced along the length dimension of one plenum chamber and uniform, narrow slot openings along substantially the full length of the chambers provides fluid communication between successive chambers from the inlet to the outlet nozzle whereby substantially uniform pressure is obtained along the full length of the narrow outlet nozzle.

Abstract: The application discloses a method of terne coating, and a terne coated product, wherein the tin content of the terne is substantially lower than in conventional terne, without the need for other alloying elements in substitution for tin, such as zinc, antimony, silver, and phosphorus. The tin content of the terne bath is lowered below conventional percentages, to between about 2% and about 6.5% and the terne coated product, upon emerging from the coating bath, is jet finished. Such a terne coat has improved solderability and appearance with no change in pinhole frequency. Coating weight control is easier than with a terne coat having 7% or more tin in the bath.

Abstract: The occurrence of defects on wire coated with an aluminum-zinc alloy coating applied by hot dipping in a molten coating bath is substantially decreased by preventing the deposition of zinc powder particles upon the surface of the molten aluminum-zinc coating prior to solidification of the coating. The deposition of metallic zinc powder particles upon the molten aluminum-zinc coating may be alleviated in several different manners, including preventing the formation of the zinc powder, preventing the accumulation of the zinc powder upon the surface of the molten aluminum-zinc bath, decomposing the zinc powder before it accumulates and exhausting or removing the zinc powder from the vicinity of the molten metal coated wire as it leaves the molten bath. Several novel apparatus arrangements for accomplishing the above are disclosed.

Abstract: Corrosion resistant coatings are applied to metal tubing while substantially continuously moving the metal tubing through a series of stations. The process comprises the sequential steps of flowing by gravity a zinc-rich thermosetting coating suspended in a volatile carrier onto the tubing, the viscosity of the coating composition being such that it flows around and completely covers the external surface of the tubing, removing excess coating by means of an air blower arranged circumferentially around the tubing and sequentially heating the coated tubing first to volatize off the carrier and then more rapidly to crosslink the thermosetting coating composition.

Abstract: Passed through a chamber holding a non-oxidizing atmosphere substantially horizontally, a steel strip is continuously coated on one side only with a molten coating metal. An electromagnetic pump imparts a thrust to the molten coating metal on the entry side of a guide so as to form a stream of the molten metal rising above the bath surface on the exit side of the guide. The rising molten metal stream contacts the bottom surface of the strip to form a film of the coating metal thereon. Provision is made to offer less flow resistance to the rising stream widthwise then lengthwise, so that the molten coating metal flows positively toward both edges of the strip.

Abstract: In this process there is determined, as a function of the conditions of the environment or other conditions, the distance from the surface of the bath at which the temperature of the zinc coating on the sheet or strip is in the range in which the zinc passes through a liquid-solid transitory state which is characterized by its friability. There is exerted at this point a mechanical action on at least one of the sides of the sheet or strip so as to completely remove away the whole of the non-alloyed zinc and allow to remain only a thin iron-zinc alloy coating whose thickness is between 1 and 2 .mu.m, which represents an amount of alloy of between 7 and 15 g/m.sup.2.

Abstract: Improved method for the continuous coating of one side only of a metal strip with molten coating metal, more particularly, one side galvanizing of a ferrous metal strip. The method includes moving a metal strip, supported by a deflector roll having a width less than that of the strip, in an arcuate path through a bath of molten coating metal with the side of the strip to be uncoated contacting the deflector roll. To prevent coating of the strip, a stream of gas is directed toward the edges of the side of the strip contacting the roll which project beyond the roll and against the surface of the bath.

Abstract: A combined gas wiping die and closed protective atmosphere chamber for treating linear material issuing from a molten metal coating bath is provided with gas exit orifices leading from the hood to the external environment. The gas exit orifices have a combined cross sectional area less than the total cross sectional area of the throat of the wiping die. The combined wiping die and protective chamber with limited area exit orifices is used with a wiping gas such as nitrogen or argon. The thickness of molten coatings on linear material wiped with the combined die and protective chamber can be very accurately controlled by changes in wiping gas pressure.

Abstract: A continuous process for applying a solder coating to copper-coated holes and tracks on a printed circuit board. The upper surface of the circuit board having a flux thereon is contacted with a contact member and the circuit board and contact member are moved through a molten bath of solder. Solder is displaced by the circuit board to produce a buoyant force which presses the circuit board against the contact member. The speed of the contact member in moving through the molten solder is controlled to determine dwell time of the circuit board and maintain contact between the circuit board and the contact member.An apparatus for continuously applying a solder coating to copper-coated holes and tracks on a printed circuit board. The apparatus includes means to contain a bath of molten solder and means to contact the upper surface of a printed circuit board.

Abstract: A method and an apparatus for continuously hot-dip galvanizing a steel strip, which comprises:Using a hot-dip galvanizing tank divided into a reaction chamber and a plating chamber having a bottom wall downwardly inclining toward the bottom wall of said reaction chamber, by a vertical partition provided, at the lowermost end thereof, with a gap and, at the upper end portion thereof, with an aperture of which the opening can be adjusted, said reaction chamber and said plating chamber communicating with each other through said gap and said aperture; causing a hot-dip galvanizing bath containing aluminum in a prescribed amount, contained in said hot-dip galvanizing tank, to circulate by convection, under the effect of stirring by a stirring means provided in said reaction chamber, through said gap and said aperture, between said reaction chamber and said plating chamber; continuously introducing a steel strip into said hot-dip galvanizing bath in said plating chamber while continuing said stirring, to subject sa

Abstract: A process is disclosed for delineating a patterned electroconductive coating on a substantially nonconductive substrate. The process can be used on substrates having a thickness in excess of 50 microinches. The process involves forming a substantially continuous electroconductive film on a substrate. An air abrasive resistant continuous mask film of metallic material is applied to the electroconductive film and etched to form masked and unmasked portions of the electroconductive film corresponding to the desired patterned coating. The unmasked portions of the electroconductive film are removed to leave the masked portions of the electroconductive film remaining on the substrate. The mask film can then be removed from the electroconductive film resulting in the desired pattern delineated in the electroconductive film on the substrate or the mask can remain in place and be used to form an integral part of the device formed with the substrate.

Abstract: An improved gas barrier assembly for controlling coating thickness on a strip, has a header which comprises abutting length segments including a pair of conduit segments fixed to a frame in spaced apart position and an intermediate gas orifice segment located therebetween mating in end-to-end relationship with said conduit segments and a readily releasable connecting means for fastening the intermediate gas orifice segment to each of the conduits in gas tight relationship, said connecting means including means for supporting the intermediate gas orifice segment when the connecting means are unfastened so that it may be removed and replaced easily without removing the frame from the coating line.

Abstract: Metallic articles, for instance, ferrous strips are metallized, for instance, zinc coated by passing the heated article through a coating chamber and applying thereto a continuous stream of the molten coating metal so as to uniformly and evenly metallize said article. Thereafter, excess molten coating metal is removed from the coated article by hot gas blasting and the hot gas blasted article leaving the coating chamber is immediately cooled. Wiping means may be provided before applying the molten coating metal so as to deflect any molten coating metal dropping from the metallic article passing therethrough, while rollers may be arranged between the coating metal applying means and the hot gas blasting means. Said rollers serve to remove the major part of excess coating metal from the coated metallic article and to stabilize movement of the metallic article passing through the coating chamber.