Abstract: A method for reducing lace breakage in a process in which a continuous roving is impregnated with a polymer powder before melting and consolidating the impregnated roving, wherein the consolidated lace tension is continuously recorded and the supply of polymer to the roving correspondingly adjusted.

Abstract: This invention relates to a method and apparatus for forming glass filament in which a fluid is applied to the filament which is passed in contact with a suction means to contact the filament with air to remove the fluid from the filament and subsequently applying a sizing composition to the filament.

Abstract: Method and apparatus for applying wax to a cardboard box blank formed from board having substantially straight parallel open-ended internal interstices, in which a zone of cascading flow of wax impregnated material is generated and the box blank is passed through the zone with the board interstices open to the wax flow.

Abstract: A solder levelling machine which uses a hot gas emanating from opposed gas knives to remove excess molten solder from a printed circuit board as the board is withdrawn from a bath of molten solder contained in a self-purging solder pot. The hot gas clears the through-holes in the circuit board and allows a controllable desired thickness of solder to remain on the board and in the through holes. A pair of heaters supplies the hot gas to the knives through a manifolding arrangement.

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: A method of finishing a molten metallic coating on metallic strip wherein an elongated subsonic fluid jet, preferably ambient air, is impinged across the molten coating on the upwardly moving strip, the narrow dimension of the jet being increased progressively from the center to each end thereof by contouring the nozzle orifice through which the jet is discharged, adjusting the distance from the nozzle orifice to the strip relative to the narrow dimension of the orifice adjacent the strip edge to satisfy the relation Z.sub.o = .phi.d whereZ.sub.o = distance from orifice to strip.phi. = length of near-field region, expressed as a multiple of dd = narrow dimension of orifice at strip edge,And minimizing the ratio of fluid jet pressure to ambient pressure for a desired minimum coating thickness, whereby to obtain optimum finishing performance and to minimize ripples and edge build-up of coating metal. A high efficiency nozzle is disclosed wherein .phi. = 8 to 10 in the equation Z.sub.o = .phi.d.

Abstract: A method of and apparatus for the immersion treatment of discrete lengths of galvanized conduit to inhibit the formation of "white rust" on the conduit surfaces are disclosed. The conduit is continually conveyed successively through three treatment zones comprising a cleaning bath containing a cleaning agent which removes lubricating oils, greases, dirt and the like from the conduit interior and exterior surfaces, a rinse bath and a coating bath containing a coating agent including chromate ions and a polymeric coating composition. A rotary star wheel-type conveyor is arranged in each treatment zone for transporting the conduits in spaced, substantially parallel relation to each other about an arcuate path through each bath and for inclining the conduit above the bath for a time effective to drain excess liquid from the interior and exterior conduit surfaces. Effective draining of excess liquid prior to entry to another zone minimizes contamination of the various baths and yields a high quality product.

Abstract: A tapered array of apertures are provided in a wall of a solder pot to permit passage of molten solder therethrough. Molten solder is pumped along an outside channel, perpendicular to the axes of the apertures, and through the apertures to cause the solder pot to overflow with a uniformly distributed wave. The array tapers in the direction of pumped fluid flow.

Abstract: A processing system which can provide a continuous assembly-line procedure for placing a catalytic coating on ceramic honeycomb type members embodies the use of a plurality of pressure tight chambers such that each ceramic member can be vacuum treated and then rapidly coated, as well as pressure treated and air blown to effect rapid coating fluid removal and partial drying. After each coating operation, there is controlled drying and high temperature curing. Also, in a preferred controlled system, there is a weighing of each element before and after each coating step to determine an amount of coating retained for comparison with a predetermined standard.

Abstract: A dewebbing unit and dip tank used in the treatment of tire cord fabric with a liquid coating containing an agent for increasing the bond between the cords of the fabric and rubber material used in the production of tires. The dip tank has a pair of weirs which the liquid coating is caused to overflow for contact with the tire cord fabric which is directed across the weirs. The dewebbing unit includes a chamber in which fluid, under pressure, is alternately passed through the fabric from opposing sides of the fabric to simultaneously vibrate the fabric and pass air through the pores of the fabric.

Abstract: Brushes and sprays wash and rinse cars and foam wax then is sprayed on the cars and is buffed by a top brush and side brushes, immediately after which a sealing wax in an aqueous solution is sprayed onto the cars. Then the cars are passed through a blower, which removes the excess aqueous solution.

Abstract: A system for controlling the thickness and distribution of a coating applied to a moving substrate includes a pair of "air knives" which discharge pressurized fluid onto a moving substrate as it emerges from a coating bath to screed excess coating from the substrate and leave a coating deposit having a desired thickness and distribution. Each air knife has a plenum chamber which supplies pressurized fluid to a pair of nozzle lips that define an elongated nozzle opening. Fluid flow influencing devices are provided between the plenum and the nozzle lips of each air knife. The flow influencing devices preferably include a baffle plate, a screen assembly, a shutter plate, and a vane assembly. The baffle plate and the screen assembly help assure that a laminar, equally pressurized flow is supplied to the shutter plate.

Abstract: A processing system which can provide a continuous assembly-line procedure for placing a catalytic coating on ceramic honeycomb type members embodies the use of a plurality of pressure tight chambers such that each ceramic member can be vacuum treated and then rapidly coated, as well as pressure treated and air blown to effect rapid coating fluid removal and partial drying. After each coating operation, there is controlled drying and high temperature curing. Also, in a preferred controlled system, there is a weighing of each element before and after each coating step to determine an amount of coating retained for comparison with a predetermined standard.

Abstract: A method and mechanism for applying a smooth layer of coating to the surface of a traveling web including a backup roll for carrying the web on its outer surface through a coating smoothing zone along the periphery of the roll, a coating applicator ahead of the zone including an applicator roll and a coating backing roll to form a pressure nip, an air knife at the smoothing zone directing a curtain of smoothing air against the oncoming web, a saveall in advance of the zone, for directing and an exhaust system downstream of the zone with a baffle to generate a cleansing flow of air to remove the airborne coating particles from the upper lip of the air knife.

Abstract: Continuous metallic strip hot dip metal coating apparatus in which streams of gas under pressure are impinged against opposite faces of a continuous metallic strip emerging from a molten coating metal bath to thereby control the final coating weight on the strip, there being provided means for giving an indication corresponding to the final coating weight on the metal strip in combination with means responsive to such indication for controlling the impingement effect of the streams of gas under pressure to thereby obtain a desired final coating weight on the metal strip.

Abstract: Apparatus for scraping metal coatings of hot-coated metal strips such as when hot-galvanizing a steel strip comprising scraping nozzles located above a metal bath and an X-ray fluorescent measuring device disposed downstream of the nozzles for adjusting the pressure at the nozzles in accordance with the measured thickness of the coating so that a pre-determined coating thickness is obtained. The measuring device is supported in a cooling chamber which allows the measuring device to be brought relatively close to the nozzles and a gaseous cooling medium is blown through further nozzles in the space within the chamber between the strip and the measuring device.

Abstract: A gas knife process for controlling the thickness profile of hot-dip aluminum coatings, employs a hybrid gas knife design incorporating both a "curved-lip" with a "bow-tie" orifice. This design, in combination with very close knife to strip distance at the strip edges, was found to provide desirable coating profiles. Best results are obtained with knife deflections of 5.degree. to 30.degree. below the horizontal while utilizing orifice pressures of 15 to 70 mm of Hg at line speeds of 20 to 150 m/min.

Abstract: The dyeing apparatus effects a programmed dyeing pattern on the travelling strip. This apparatus includes a housing provided with a through channel for passage of the travelling strip through a treatment station in the housing. Treatment medium such as a dye is delivered to the treatment station via a channel perpendicular to the strip. In addition, compressed air is delivered to the treatment station via a funnel-shaped channel downstream of the station to remove excess dye from the yarn and to obtain a clean well-defined dyed area on the strip. A similar funnel-shaped channel upstream of the treatment station serves to seal the elongated channel against the treatment medium. Also, an exhaust channel is provided to remove excess treatment medium and air.

Abstract: In a coating apparatus, doctor means for effecting a uniform coating of a molten metal includes an air-knife means having a sliding shutter disposed within the nozzle at each end of the slot thereof. Each shutter is configurated and operatively associated with a nozzle wall to form a chamber having an opening at the nozzle slot. Means feed a gaseous fluid through each said chamber at a relatively high pressure to therby effect a composite air-knife having higher pressures at the ends thereof.

Abstract: Steel strip at around 1000.degree.F. or higher is run into a galvanizing pot maintained at a higher than conventional temperature to cause alloying of the iron with the spelter on the surfaces of the strip, the strip being passed through a zone of cooled molten spelter before being withdrawn from the galvanizing bath, the steel strip issuing from the bath having an inner iron-zinc alloy coating and an outer molten spelter coating, substantially all the molten spelter coating being removed from at least one surface of the strip by a stream of gas under pressure. Where molten galvanizing spelter coating is left on one side, the weight of the molten layer averages at least 1/10th of an ounce per square foot of coated surface.

Abstract: Apparatus for and method of producing glass strand including withdrawing spaced apart continuous glass filaments from streams of molten glass; advancing the filaments along converging paths to a gathering member, the advancing filaments moving air with them; applying a coating substance to the filaments; gathering the filaments into a strand; and removing any excess coating substance from the strand by diverting at least some of the moving air to flow generally transversely across the path of the advancing strand.

Abstract: An apparatus and method for continuously cleaning and coating wire is disclosed in which rod having scale and other inpurities on its outer surface is first mechanically descaled by passage through a plurality of spatially positioned rollers, then cleaned by frictional scraping by at least two rotating and orbiting abrasive drums which scrape the entire outer surface of the rod. The cleaned rod is then covered by a coating solution and electrically heated to a temperature sufficient to bake a coating on the exterior surface of the rod. The rod is then passed to a drawing apparatus.

Abstract: Apparatus for the spraying of atomized particles, which comprises means for producing a stream of gas atomized particles, means for directing a secondary stream of gas against the stream of gas atomized particles and control means adapted for repeated cyclic operation for varying the secondary stream of gas in such a manner as, in operation, to deflect the stream of gas atomized particles and impart thereto an oscillation substantially in a single plane. There is also included a process for spraying atomized particles which comprises producing a stream of gas atomized particles and directing a secondary stream of gas against the stream of gas atomized particles in such a manner as to deflect the stream of gas atomized particles and impart thereto an oscillation substantially in a single plane.

Abstract: A processing system which can provide a continuous assembly-line procedure for placing a catalytic coating on ceramic honeycomb type members embodies the use of a plurality of pressure tight chambers such that each ceramic member can be vacuum treated and then rapidly coated, as well as pressure treated and air blown to effect rapid coating fluid removal and partial drying. After each coating operation, there is controlled drying and high temperature curing. Also, in a preferred controlled system, there is a weighing of each element before and after each coating step to determine an amount of coating retained for comparison with a predetermined standard.

Abstract: A method for coating a paint of high viscosity, wherein the paint is extruded in a filament-like form from a nozzle and is applied to a moving surface in a striped or convoluted pattern, and a gas is blown against the coated surface to smoothen it.

Abstract: An apparatus is disclosed for solder-coating a member provided with at least one passage having two open ends. The apparatus includes an arrangement for applying molten solder is applied to the member at least in the region of one of the open ends, and an arrangement for subsequently passing a pressure fluid through the passage prior to solidification of the molten solder so as to prevent possible blockage of the passage by the solder.

Abstract: A method of and an apparatus for the internal coating of ducts with a synthetic resin, especially long steel pipes or tubes, in which gas-entrained synthetic-resin particles are passed through the tube while the latter is heated progressively by displacing the tube relative to a surrounding induction-heating coil. Thereafter, a gas stream free from particles is used to clear the interior of the tube.

Abstract: Opposed fluid doctor blades include each a slotted elongated nozzle including adjustable lip elements adaptable to vary the configuration of the fluid blade. Blade elements disposed within the nozzle are adjustable along the elongated extent of the slot whereby to adjust the effective length thereof.

Abstract: This application discloses "wiping" of a liquid, molten zinc, for example, across the surface of a strip to which it adheres. A wiping fluid, such as steam, is directed from an orifice at the strip. A valve, preferably an elongated relieved bar is positioned adjacent and behind the orifice, and flow of wiping fluid is controlled by rotation of an elongated valve in the form of a relieved bar or cam.

Abstract: Glassware treating apparatus in which bottles which have been coated with a non-abrading coating are treated to remove surface irregularities in the coating on the bottom of the bottles. The bottles are gripped and suspended from conveyor means and pass consecutively over a heating zone, a cooling zone and a drying zone for removing the surface irregularities.

Abstract: Objectionable ripple formation in continuous hot-dip coating is avoided by using a single set of blowing nozzles and directing the gas streams downwardly against the strip at an angle between the strip and the center line of the gas stream of from about 0.degree. to about 45.degree., preferably from about 20.degree. to about 40.degree.. The technique is particularly useful at low line speeds of 150 feet per minute or less, especially at high coating weights of 1.5 ounces per square foot or more.