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: 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: In an apparatus for the continuous, uniform coating with a liquid coating material of a web passing over a counter roll, comprising an air-nozzle arrangement for the removal of excess coating material and the smoothing of the coating, said air-nozzle arrangement being rotatable about its longitudinal center axis, being disposed adjacent to the counter roll and comprising two slot nozzles disposed symmetrically about its longitudinal center axis and displaced 180 degrees relative to each other, each nozzle extending at least over the width of the web, and the two lips of each nozzle being seated on nozzle-lip holders mounted on the casing of the air-nozzle arrangement, the improvement which comprises imparting to the nozzle-lip holders an angular construction and mounting them on the casing in such a way that they can be positioned and adjusted in the direction of the nozzle-slot width; one of the nozzle-lip holders being of smaller cross section over its angled area than the other nozzle-lip holder; the nozzl

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 invention relates to an apparatus and to a method for removing thickenings in layers which are produced transversely to the direction of travel of the web after the coating of continuously moving webs with liquids whereby the coated web is deflected by a web guide element and two air jets pointing towards each other are directed to a small angle .alpha. towards the layer of the web from below the deflecting point as air blades which are actuated when thickenings appear in the layer and which scrape off the particles of the thickening and blow them into a vacuum tank which is sprinkled all over with water and the water and particles are supplied to a vacuum generating device which, in turn, is evacuated by a jet suction device without interrupting the vacuum.

Abstract: There is disclosed a system incorporating aligned cylinders through which a cable is moved. The cylinders have jet nozzles connected to respective manifolds which are adapted for receiving different fluids for treating the cable. Control apparatus is provided for operating the cylinder stages simultaneously, and permitting manual selection of any one or combination of such operations. With fluid applied to all nozzles simultaneously, the cable is successively blast cleaned with water, jet dried with air, and jet lubricated with oil. Also shown is control apparatus adapted to control a motor for moving the cable through the cylinders. The air drying station includes nozzles for moving the air tangentially and from the exit to the entrance end of the air cylinder, for drying the cable and preventing water from the cleaning station from entering the drying station.

Abstract: A printed circuit board solder leveling device comprising guides distributed across the width of the soldering bath container. Each guide comprises opposed guide rods spaced apart a distance greater than the thickness of a printed circuit board so that there is loose contact only of the guides with opposite sides of the board.

Abstract: A soldering system is described in which a fluid stream is directed onto a soldered board substantially immediately following deposition of molten solder onto the board. Preferably, but not necessarily, the fluid, which may comprise a gas or mixture of gases, is heated prior to contacting the board. The impinging fluid stream relocates solder on, and/or blasts excess solder from the bottom of the board, and any interconnections, component leads and/or component bodies carried thereon before the solder solidifies as shorts, icicles or bridges. If desired, liquid droplets such as soldering oil may be included in the fluid stream.

Abstract: A soldering system is described in which a fluid stream is directed onto a soldered board substantially immediately following deposition of molten solder onto the board. Preferably, but not necessarily, the fluid, which may comprise a gas or mixture of gases, is heated prior to contacting the board. The impinging fluid stream relocates solder on, and/or blasts excess solder from the bottom of the board, and any interconnections, component leads and/or component bodies carried thereon before the solder solidifies as shorts, icicles or bridges. If desired, liquid droplets such as soldering oil may be included in the fluid stream.

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: The subject invention provides an improvement in split gas-wipe apparatus, which, although not limited thereto, is normally used in coating or cleaning applications on wire, rod, or strand. The conventional apparatus has two segments hinged along an outer edge parallel to the passline of the wire or rod. The segments have mateable half-conical guides on their entry side which, when contacted by joints in the workpieces, cause rotation of one segment, the other normally being fixed, so that the joints have sufficient space to automatically pass through. The improvement of this invention involves providing pivoted mounting means replacing the hinged joint, the mounting providing an axis of rotation for one of the segments in a plane normal to the passline and substantially spaced therefrom. Advantageously, much larger joints may pass through the apparatus.

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: An air knife coater mechanism such as for coating a traveling web of paper including a backup over which the web travels with means for applying a coating to the web surface and an air knife for smoothing the coating while the web is supported on the backup roll with the air knife having first and second lips with the upper lip pivotally mounted for movement away from the lower lip to an open position for access to the gap and cleaning the distal edge of the upper lip and the operating mechanism in the form of an adjustable toggle linkage.

Abstract: A nozzle and associated apparatus for controlling the thickness of liquid coating on continuous webs which produces a thin jet of fluid for impingement across the width of moving web having a liquid coating thereon, the fluid in the portions of the jet on either side of the center of the nozzle having components of motion toward the edges of the web. One form of nozzle structure for achieving such lateral movement of the fluid issuing from the nozzle has a centrally positioned fluid inlet port to an inner plenum chamber, the port having a cross sectional area at least several times the cross sectional area of the nozzle orifice. Another form of nozzle structure for accomplishing this purpose involves baffle means in the path of the fluid flowing through the nozzle which changes the direction of flow of the fluid so as to give the fluid on either side of the center of the nozzle a component of motion toward the edges of the nozzle.

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: Apparatus for dusting articles such as electrical cables with a powder such as talc, to prevent the articles sticking together, comprises means for agitating powder in a chamber and means for conveying powder-laden air from the chamber to a dusting nozzle.For efficient dusting of an article, it is important that a constant uniform flow of powder-laden air is conveyed to the dusting nozzle.A fluidized bed of dusting powder is created by a fan creating an air flow up through a permeable screen. A conveying nozzle receives some of the air flow, being positioned close to the screen, and comprises a convergent portion which accelerates the flow of powder-laden air to transport it to a discharge portion of the nozzle.

Abstract: A coating system utilizing application under vacuum technology in which entrance and exit ports for the material to be coated are defined by a pair of horizontal gates and a pair of vertical gates at the inlet and outlet apertures of the coating chamber. A mounting arrangement at each port mounts the top vertical gate and the two horizontal gates in sliding relation with associated edges of the inlet and outlet apertures. Positioning arrangements are provided for each of the slidably mounted gates for setting an initial position of the associated gate, and each gate is provided with spring means for biasing that gate toward its initial position.

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: Disclosed is an apparatus for reproducing patterns on flocked material. The pattern to be reproduced is scanned as a sequence of lines. For each line, the reflected light intensity is measured as a function of the position along the scanned line. This information is then used to control an air jet for selectively deflecting from the perpendicular the flocking fibers thereby to reproduce the desired pattern.

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: 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: A fabric conditioner composition is applied to an air-permeable sheet and variably displaced so that the conditioner occludes interior interstitial spaces in certain regions of the sheet to block air flow therethrough, leaving other regions of the sheet with interstitially open spaces.

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: Applying photoresist to silicon wafers in the manufacture of integrated circuit chips by carrying the wafers upon a rotor in a chamber and spraying from a plurality of nozzles in the chamber toward the rotor for application to the wafers.

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: Apparatus for applying toner to a tape which has toner-attracting images thereon, including a chamber containing toner, a chamber inlet located below the top of the toner, a chamber outlet above the top of the toner, and a tape guide which is convex along the tape path which leads through the toner to minimize toner pickup on the rear face of the tape. A vacuum is maintained at the top of the chamber to create an inflow of air at the tape outlet, to sweep back loose toner.

Abstract: An electrostatic copying machine includes a reservoir for liquid developer made up of toner particles in a dispersant. A photoconductive drum, adapted after receiving a latent electrostatic image thereon to pass through the liquid developer in the reservoir and to have an electrostatic image developed on the drum. A metering roller for removing excess dispersant is positioned between the reservoir and an air knife which projects a sharp thin jet of pressurized air at about a 45 degree angle with respect to the surface of the drum. The air pressure produced by the air knife drives any remaining spent dispersant on the surface of the drum back to the reservoir by way of the metering roller and the latent image on the drum is subsequently transferred to paper.

Abstract: A traveling web coater for applying a smooth uniform layer of liquid coating of controlled weight onto the surface of a traveling web including a gate coater having a plurality of gate rolls for metering and applying coating to a traveling web supported on a backing roll with an air knife positioned to direct air onto the web downstream from the gate rolls and to essentially smooth the coating removing a minimum amount of the coating which has been accurately metered by the gate rolls.

Abstract: Apparatus for coating and metering a coating on a paper web. A system is provided for mixing doctored excess coating material with fresh, make-up material and recirculating the mix by gravity flow for reapplication to the moving paper web.

Abstract: A nozzle and associated apparatus for controlling the thickness of liquid coating on continuous webs which produces a thin jet of fluid for impingement across the width of moving web having a liquid coating thereon, the fluid in the portions of the jet on either side of the center of the nozzle having components of motion toward the edges of the web. One form of nozzle structure for achieving such lateral movement of the fluid issuing from the nozzle involves baffle means in the path of the fluid flowing through the nozzle which changes the direction of flow of the fluid so as to give the fluid on either side of the central portion of the nozzle a component of motion toward each end portion of the nozzle. Still another form of nozzle structure combines the foregoing features with the so-called curved orifice nozzle where operating conditions indicate the desirability of some build-up of coating on the central portion of the web.

Abstract: Improved apparatus 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. Characteristics of the invention are (1) an atmosphere controlled entry chute through which said metal strip passes into the molten coating metal, (2) a deflector roll which guides said strip into and out of said molten coating metal, where the width of said deflector roll is less than the width of said strip and said strip is only slightly immersed below the surface of said molten coating metal, (3) movable guide means adapted to shift laterally with corresponding movement of said strip, and (4) gas jets secured to said guide means and directed towards edges of the uncoated surface of said strip projecting beyond said deflector roll to prevent molten metal from contacting said uncoated surface.

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: Apparatus for applying toner to a tape which has toner-attracting images thereon, including a chamber containing toner, a chamber inlet located below the top of the toner, a chamber outlet above the top of the toner, and a tape guide which is convex along the tape path which leads through the toner to minimize toner pickup on the rear face of the tape. A vacuum is maintained at the top of the chamber to create an inflow of air at the tape outlet, to sweep back loose toner.

Abstract: This invention relates to an improvement in a device for treating a sheet of material, for example a sheet of foil and the like, which partially encloses a backing roll or a cooling cylinder, including slotted nozzles or wipers extending over the width of the sheet of material and positioned at intervals with respect to each other, for the application of a treating medium onto the sheet of material, the improvement comprising means whereby the backing roll or the cooling cylinder dips into a liquid in a segment-like manner, and means mounting the slotted nozzles or wipers below and above the liquid level and near the sheet of material on the segment surface of said backing roll or cooling cylinder.

Abstract: A conveyor is arranged to pass lumber strips through a tank of treating liquid and includes pairs of upper and lower flexible lines arranged to receive lumber pieces therebetween. Hold-down apparatus is engageable with the upper flexible lines and is arranged to force such upper lines toward their lower lines to frictionally hold lumber pieces between the upper and lower lines and also to force the assembly of upper and lower flexible lines and lumber pieces down below the liquid level in the treating tank for coating the lumber pieces during the pass of the conveyor through the tank. In a preferred arrangement, the flexible lines comprise resilient type ropes wherein the conveyor assembly is forced down below the liquid level by a stretching of the ropes. The hold-down apparatus is pivotally supported adjacent one end of the tank and has longitudinally spaced pulleys for guiding the ropes, these pulleys being arranged to vary the submerged length of travel by pivotal adjustment of the hold-down apparatus.

Abstract: A system for continuously quench-pickling cast rod from a continuous casting machine wherein molten metal is poured into a mold of a casting device and cooled and solidified into a continuous solid bar, the bar is elongated and reduced in its cross-sectional area to form continuous rod, and the rod is arranged in a coil. The surface of the hot rod from the rolling mill is contacted with a pickling fluid, such as a citric acid solution, after the rod leaves the rolling mill and before the rod is arranged in a coil, to simultaneously quench and pickle the rod.

Abstract: Apparatus for removing excess developer liquid from the surface of a photoconductor carrying a layer of developer liquid of a predetermined thickness in which a mechanical barrier extending across the photoconductive surface is positioned at a distance from the photoconductor surface which is less than said predetermined thickness, in which the surface and the mechanical barrier move relative to each other so that the mechanical barrier has a trailing portion with reference to the direction of relative movement, and in which a low-pressure air barrier is provided in the region of adjacency of the surface and the mechanical barrier to inhibit wetting of the trailing portion of the latter by the developer liquid.

Abstract: A method of and apparatus for continuously, evenly and uniformly coating one side only of a moving strip of material, such as steel, with molten zinc or other fluid coating material while effectively preventing the coating material from contacting the opposite side of the moving strip.

Abstract: A method of producing a hot-dip galvanized steel strip having a uniform zinc-iron alloy coating on one surface and a formable hot-dip metallic zinc coating on the opposite surface which comprises forming a thin uniform hot-dip metallic zinc coating which has a coating weight less than 0.10 ounces per square foot on one side and a heavier metallic zinc coating on the opposite surface and passing the coated strip through a chamber having heating means and cooling means therein, said heating means, such as gas jets, adapted to apply heat directly only to the thin zinc coated side of the strip to convert the thin zinc coating into a fully alloyed zinc-iron coating, and said cooling means, such as air jets, adapted to blow cooling air onto the heavier zinc coating to effect rapid cooling thereof while the thin zinc coated side is being heated; thereby preventing formation of a thick zinc-iron intermetallic subsurface layer on the heavier coated side.

Abstract: Excess coating material removed from a coated web 1 by an air doctor 6 and entrained in the exciting gas mixture flow 8 is directed along a plate 9 to effect primary coating material separation and recovery in a chamber 11, whereafter the flow passes along an inwardly spiraling apparatus wall 14 which terminates in an air exhaust duct 16. The wall 14 initially continues the prolongation or extension plane of the plate 9, and includes secondary recovery chambers 13 and 15, whereby separation is implemented by both centrifugal and gravitational forces. The same concepts may also be used to recover solid particles in a surface abrasion apparatus such as a sand blaster.

Abstract: Apparatus for finishing a molten metallic coating on metallic strip and sheet comprising means for removing excess molten coating metal by impinging an elongated jet of gas under pressure on opposite sides of the strip and sheet substantially normal thereto. An improved nozzle of high efficiency is disclosed having an elongated plenum chamber communicating directly with a pair of elongated converging lips defining an orifice of about 0.03 to about 0.20 inch, the interior surface of the plenum chamber merging smoothly into each lip with a radius of curvature substantially equal to the orifice opening. The near-field region of the nozzle is about 8-10 times the orifice opening.

Abstract: Method and means for continuously contact-coating one side only of a ferrous base metal strip with a molten coating metal. One or more roll means are provided to conduct the strip surface to be coated above the surface of a bath of the molten coating metal. The strip surface to be coated is caused to travel sufficiently close to the molten coating metal bath surface that the surface tension and wetting characteristics of the coating metal will permit the formation of a meniscus which will continuously contact and coat the strip surface. The coating is subjected to jet finishing. The strip is maintained in a protective non-oxidizing atmosphere at least until the one side thereof is coated. Alternatively, at least that side of the strip to be coated with the molten coating metal is coated with a flux which remains on the strip until contacted by the coating metal meniscus.

Abstract: A method for finishing molten metallic coatings applied to iron and steel strip by the use of an elongate, laminar flow fluid jet, which jet is used to control thickness and quality of the finished coating.The narrow dimension of the fluid jet is contoured across the strip width to produce the desired coating weight at all parts of the strip and to produce a coated strip edge free from excessively heavy coatings and/or oxide "berries.

Abstract: This method involves impinging fluid against a liquid coating on opposite surfaces of a moving web with the fluid impinging against the liquid coating across the width of the web to control the liquid coating thickness so that on either side of the center of the web there is a component of motion of the fluid toward each associated edge of the web, whereby excess liquid coating on the web has a component of motion toward each edge of the web.

Abstract: An applicator is disclosed for applying binder and/or size to glass filaments. The applicator is designed to both apply the binder and/or size to the filaments and gather the filaments into a unified strand. Due to its unique design, the applicator directs the moving strand in a direction such that the air flowing downwardly with the filaments as they are formed expels binder and/or size from the filaments and the applicator recovers this material for recirculation. This is accomplished without the need to divert the air flowing downwardly with the filaments from its normal path and without the use of any external deflector shields or other means for diverting airflow.

Abstract: Method and means for continuously contact-coating one side only of a ferrous base metal strip with a molten coating metal. One or more roll means are provided to conduct the strip surface to be coated above the surface of a bath of the molten coating metal. The strip surface to be coated is caused to travel sufficiently close to the molten coating metal bath surface that the surface tension and wetting characteristics of the coating metal will permit the formation of a meniscus which will continuously contact and coat the strip surface. The coating is subjected to jet finishing. The strip is maintained in a protective non-oxidizing atmosphere at least until the one side thereof is coated. The strip may be maintained in the protective non-oxidizing atmosphere until it is sufficiently cooled to prevent the formation of a visible oxide on the uncoated side thereof.

Abstract: An air knife having at least one lip which is slidable relative to its body via a plurality of cam plugs which are interposed between the slidable lip and the body member to adjustably extend and locate the lip tip relative to the other lip tip periodically as the lips become worn and the gap between them increases. The adjustable lip is secured to the body member by a plurality of cap screws which alternate with the cam plugs across the width of the air knife.

Abstract: A method of and apparatus for continuously, evenly and uniformly coating one side only of a moving strip of material, such as steel, with molten zinc or other fluid coating material while effectively preventing the coating material from contacting the opposite side of the moving strip.