Abstract: Semiconductor compounds which are alloys of group III-V compounds are grown by a liquid phase epitaxy method which includes heating growth apparatus in a reducing atmosphere while maintaining a solvent for the compound, a source of the group III-V compound and another element of the alloy separate from each other. After heating to reduce oxides, the element is added to the solvent, the source is brought into contact with the solvent and the resulting solution is brought into contact with a substrate to effect growth of the compound. Apparatus for carrying out the method is also described.

Abstract: A slide-type bead coating apparatus in which a semi-circular groove is formed in the groove surface adjacent a moving web. The speed of the coating liquids is rapidly increased as the liquid flows drop abruptly along the falling part of the groove after which the liquids are smoothly delivered from the rising part of the groove. The maximum possible coating speed is significantly increased especially for low liquid flow rates.

Abstract: An apparatus for continuously coating a sheet material concurrently with a plurality of coating liquids in the pattern of a plurality of stripes, having a coating liquid-feeding device having a plurality of parallel compartments each defined by a pair of vertical partitioning plates and an inclined guide plate for introducing a coating liquid onto a portion of the sheet material, each partitioning plate having a bottom edge thereof having a profile in the form of an arc bulged downward from an imaginary straight line drawn between lowermost ends of both side edges of the partitioning plate.

Abstract: When a coating composition is applied to a web, the composition is applied in excess, and the excess is wiped off with the help of a portion of the web which has not yet been coated.

Abstract: Coating apparatus for carrying out a process of coating in which one or more layers of coating composition are applied to the surface of an object, such as a continuous web or discrete sections of sheet material, by advancing the object through a coating zone in which a flow of coating composition is applied thereto, for example, bead coating or curtain coating apparatus, is provided with a shield to protect the flow of coating composition against disturbance by ambient air currents. The shield is formed of a foraminous material, such as screening or perforated plate material, which functions to diffuse air currents impinging thereon so that their velocity is decreased, with a resulting decrease in their ability to disturb the flow of coating composition.

Abstract: In application of metered finish to a high speed running yarn, a felt plug or other resistance to fluid flow is provided in the finish passageway just prior to the exit.

Abstract: For striping pencils, paint is extruded through die orifices in the walls of a passage through which the pencil is advanced longitudinally. The orifices are formed in lands which engage corresponding side regions of the pencil and guide the pencil through the passage. The passage is formed in a block having parts that are supported for relative movement along guide rods and are urged together resiliently. Each block part may have at least one paint reservoir with a duct extending from the reservoir and terminating in a die orifice. The paint, which is supplied to the reservoirs under pressure from a separate source moves longitudinally of the pencil in shallow channels as it issues from the orifices and spreads laterally to an extent depending upon viscosity of the paint, forming stripes of width greater than that of the orifices.

Abstract: In application of metered finish to a high speed running yarn, the exit portion of the finish passageway is angled such that a positive atmospheric gauge pressure adjacent to the exit of said passageway is maintained.

Abstract: In application of metered finish to a high speed running yarn, a vent is provided in the finish passageway just prior to the exit.

Abstract: In application of metered finish to a high speed running yarn, a check valve at the end of the finish passageway prevents entrained air fluctuations from entering the finish passageway.

Abstract: Disclosure is made of an apparatus for applying paste upon blank strips for cermet electrodes of alkaline storage batteries. The backing strip is advanced by a drive through a bin filled with the paste. This bin is made in the form of two autonomous reservoirs having in their respective lower portions, in the walls thereof facing each other, ports with edges through which the paste can leave the reservoirs. The upper edges of these ports define, upon said reservoirs having closed upon the backing strip, an application nozzle having centering lugs made on the edges of the ports, to center the backing strip with respect to the application nozzle.

Abstract: In a method and apparatus for treating a fibrous board, a portion of an edge of the board is cut away, a liquid adhesive is applied to the remaining edge portion, and the liquid is dried to bind the fibers of the remaining edge portion.

Abstract: The invention relates to a commonly used type of casting device for coating webs with a single or a plurality of layers, comprising a casting block supported by brackets and comprising a plurality of shaped parts screwed together, in the casting block being rigidly fixed to a torsion-free hollow support and forming therewith a unit which is fixed to the brackets by a three-point bearing.

Abstract: An apparatus for depositing one or more layers of a material on a substrate by liquid phase epitaxy includes in a furnace tube a furnace boat having a plurality of wells in its upper surface and a substrate-carrying slide movable through the boat and across the wells to bring the substrate into the wells. Over and along the top surface of the boat is an elongated, hollow support rod which is rotatable about its longitudinal axis. A plurality of cup-shaped containers are mounted on or secured to the support end. The containers are positioned along the support rod 30 that each container is over a separate well in the furnace boat. A thermocouple is within and movable along the support rod.

Abstract: A toner head is disclosed for applying liquid toner to a moving record medium having a latent electrostatic image thereon, in which the contact surface of the head is curved in a cylindrical form to ensure proper engagement of the record medium during toning. Since the toner is circulated through the system by a vacuum pump arrangement, pressure relief means are provided to prevent an inward deflection of the record medium that could choke off toner flow during periods when the record medium is not moving over the toner head. In one embodiment, the toner head comprises a plurality of identical modules which are oriented alternately in opposite directions, so that some serve as toner inlet stations and some as exhaust stations. A toner clean-off head having a cylindrically curved contact surface is also disclosed.

Abstract: A furnace boat has a plurality of wells therein. A first slide movably extends through the boat along and across the bottom of the wells. The first slide carries a substrate on which layers of semiconductor material are to be deposited. A second slide movable extends through the boat and across the wells adjacent the open tops of the wells. The second slide supports the starter deposition materials. A wafer extends partially across each well adjacent each slide, and an inclined guide plate extends partially across each well from adjacent the second slide to an edge of the wafer. Molten deposition material is deposited from the second slide onto the inclined guide plate and rolls into an end of the space between the wafer and the substrate carried on the first slide. The deposition material is then sucked into the space between the wafer and substrate by capillary action. Upon cooling the furnace boat, the semiconductor material will deposit from the deposition material onto the substrate.

Abstract: Method and apparatus for coating a moving web with a multilayer liquid composition. A pool of the multilayer liquid composition is formed by flowing liquids along spaced paths through discharge slots exiting into a cavity of a liquid feeding apparatus, the cavity being located adjacent to and spaced apart from the moving web. The discharge slots are spaced progressively farther from the web and the liquid flow paths are aligned in directions that do not intersect the web so that each path is accessible to a cleaning probe inserted through the path slot. The multilayer liquid composition is formed into a bead which extends from the pool into contact with the moving web, and the moving web entrains the multilayer composition from the bead.

Abstract: An improved process for coating sheet substrates with thermoplastic polymer is disclosed. In the process the sheet substrate forms one die lip of the extrusion coating die. The sheet substrate is passed from face-to-face contact with the metal block of the extrusion coating die into a spaced apart relationship with one die lip of the extrusion coating die, the sheet substrate forming the second die lip. Molten thermoplastic polymer is extruded into the space between the one die lip and the sheet substrate, thereby coating the sheet substrate with polymer. The preferred polymer is a poly-.alpha.-olefin, especially polyethylene or a copolymer of ethylene and butene-1. The preferred sheet substrate has orifices in the surfaces thereof. The process may be used to coat sheet substrates with a thermoplastic polymer, e.g. in the manufacture of form boards for the construction industry.

Abstract: Method and apparatus for coating a moving web with a multilayer liquid composition. The liquid composition is flowed by gravity down a plurality of slides each having a concave, inclined surface and having slots for feeding each layer onto the inclined surface. The inclined surface can be wholly or partially concave wherein the concave portion extends across the width of the slide.

Abstract: A method and apparatus for coating a seal edge of a funnel portion of a television cathode ray tube with frit slurry, which method includes the steps of arranging at least one pair of nozzle bodies containing frit slurry adjacent to the seal edge, predetermining initial points and terminal points on the seal edge corresponding to the number of pairs of nozzle bodies, moving the paired nozzle bodies from one of the initial points, in opposite directions, along the seal edge while discharging the viscous material on the seal edge and having two of the nozzle bodies meeting each other at one of the terminal points. The whole seal edge is in this manner coated with a continuous uniform layer of frit slurry.

Abstract: A device for applying a plurality of spaced beads or ribbons of cementitious material, such as mortar, to a course of masonry units being laid as a wall or the like. A frame member is provided for supporting a plurality of dispensing beads or nozzles that have containers or hoppers associated therewith for delivering mortar to said nozzles in the laying of a ribbon or bead of mortar on a row of bricks or cement blocks. The frame member is also provided with guide members to insure the proper laying of the ribbon or bead of mortar.

Abstract: Annular shaped packages of yarn and the like are draped about a pair of rolls rotatable about horizontal axes. The rolls are moved apart to apply tension to the package, and a squeeze roll is urged toward one of the other rolls and against the package. One of the rolls is rotated to move the yarn package about the rolls, and liquid dye is applied to a downwardly moving portion of the package above the squeeze roll.

Abstract: Both sides of a travelling web are adapted to be continuously but separately coated with coating material by passing the web through successive roll-formed puddles in a simple three roll arrangement. Means are provided for preventing coating migration from one puddle to the other.

Abstract: An apparatus for multiple stripe coating of a web with liquid coating composition is comprised of a hopper having a pair of spaced lips and a pair of shims mounted in face-to-face arrangement within the hopper and positioned between the spaced lips. One of the shims is provided with a plurality of open-ended channels while the second shim is equipped with a plurality of projecting portions, corresponding in width and location to the desired stripes, which are in alignment with the open-ended channels and project beyond the open ends thereof. The apparatus is capable of carrying out multiple stripe coating of a web at high speeds and with a high degree of precision in regard to stripe width and registration.

Abstract: Method and apparatus for the surface coating and impregnation of the interstices of a moving porous web, and particularly method and apparatus for the production of elastomer-coated, bias-cut woven fabrics during a tentering operation. The coating apparatus disclosed consists of means for applying a layer of coating material sequentially to the lower and upper surfaces of the moving web to substantially penetrate the coating into the interstices of the web, while smoothing the surfaces to provide a uniform and controlled coating of desired thickness on the fabric.

Abstract: Apparatus for controlling the depth of material laid on a web and comprising a head for laying the material, an arrangement for continuously moving the web past the head, first and second members defining an extrusion gap for receiving the web, and a control device arranged to effect movement of one member relative to the other to vary the size of the gap, the control device comprising a fluid-pressure operated piston and cylinder unit including a plurality of relatively movable cylinders and pistons individually extensible and retractable to vary the length of the unit, and a switching arrangement for individually operating the cylinders.

Abstract: A method and apparatus for coating thixotropic high viscosity liquid coating compositions on a moving web at a narrow coating in such a manner as to provide a flat coating surface. The apparatus is provided with at least two liquid discharge ports arranged side by side opposite to the moving web so that the liquids are discharged through the ports and the edge of the coating liquid streams meet on the web. The apparatus is further provided with an extrusion type hopper having two slide members of which the tip ends are in the form of a knife edge, the slide members being arranged so that the knife edges are directed inwardly toward each other, at least one partition plate interposed between the slide members so as to equally divide the distance between the internal surfaces of the slide members. The method of this invention is well suited for use in applying a magnetic recording stripe to a motion picture film.

Abstract: An apparatus for liquid-phase epitaxial growth is characterized in that the greater part of that surface of a well, made of carbon, which contacts with a solution for liquid-phase epitaxial growth is covered with a fused quartz layer.

Abstract: Apparatus for applying glue to a surface of an object moving relatively to the glue applying apparatus is provided by a valve housing having a valve bore therein, the bore having a glue outlet orifice and a glue inlet, the valve housing being adapted to be disposed such that the orifice is adjacent the surface of the object upon which glue is to be applied; valve means are disposed within the valve bore for opening and closing the glue outlet orifice; and a slot is disposed in the outer surface of the valve housing in fluid communication with the orifice and oriented such that the longitudinal dimension of the slot lies substantially parallel to the direction of travel of the surface upon which glue is to be applied, the slot having a cross-sectional area which is smaller than the cross-sectional area of the glue outlet orifice, the length of the slot being sufficient to hold an amount of glue remaining in said slot after the valve means has closed the orifice until the relatively moving surface draws the glu

Abstract: Method for coating a continuous moving strip of material with a liquid coating material such as a plastic or polymer material is disclosed and in which the moving strip to be coated is directed in contacting engagement with a curved peripheral surface on a fixed coating head disposed transverse to the direction of strip travel, with the coating material being supplied through a central passage in the coating head and outletting through a radial passage formed in one or more lands in the coating head, which lands are girded on opposite sides by grooves. The coating head is fixed such that the outlets in the lands desirably are located adjacent the point of last contact of the moving strip with the coating head so that a meniscus of material is established at said location and is in contact with both the land surface and strip to permit pickup of the coating material by the strip.

Abstract: In order to eliminate non-uniformity in the temperature within the plane of a substrate that causes dispersions or variations in the characteristics of a grown layer during liquid phase epitaxial growth and to produce a grown layer having uniform characteristics, an apparatus for crystal growth according to the invention holds a substrate on a jig so that a flat surface of the substrate is arranged tangentially to an isothermal plane within the jig and aslant with respect to any position perpendicular or parallel to the axis or the center plane of the jig. Where a multiplicity of substrates are set, they are held on at least two flat surfaces which are tangential to an identical isothermal plane and which have different slopes.

Abstract: Apparatus for epitaxially growing a laminate semiconductor layer in liquid phase on the crystalline surface of a substrate by successively bringing different kinds of liquid phase epitaxial growth solution into contact with the surface of a substrate, which is characterized in that different kinds of liquid phase epitaxial growth solutions are injected one after another into solution receptacle, the bottom of which is open to the substrate surface, and each of the preceding one of the epitaxial growth solutions is expelled from the solution receptacle by each succeeding one of the epitaxial growth solutions for interchange between both solutions and thereafter each succeeding solution is epitaxially grown on the preceding one.

Abstract: The patterning and blending system according to this invention superimposes two or more lateral channels distributing diverse liquids over a multitude of crosswise oriented feeder chambers with the option to block the flow connection completely or to connect each feeder chamber with any or all of the distributor channels by means of a choice of variable type and calibrated connecting orifices for the predetermined combination of proportional liquid streams of constant and repeatable quality, creating either single flow or striated liquid bundles, which in any feeder are identical to preconceived pattern notations, or to blend such liquid combinations homogeneously between distribution section and application plane on a continuous basis and at a choice variable from feeder chamber to feeder chamber and from pattern to pattern, and with means to supply automatically and under pressure a number of liquids to a constant level staging area where gravity/suction forces take over to provide measured and blended flow

Abstract: Apparatus is provided for the simultaneous application of a plurality of layers of liquid coating compounds to an article. The apparatus and method of use thereof is, in one aspect, intended for coating a film with photographic emulsions.

Abstract: A continuous dyeing process for use in dyeing material, such as carpet, a selected one of a number of colors. The process is performed by providing at least two dye applicator means, advancing a length of material to be dyed along a predetermined path adjacent the applicator means, operating one of the applicator means a predetermined period of time to apply one color dye to the length of material moving along the predetermined path, fixing the first color dye to the length of material, operating the other one of the dye applicator means for a predetermined period of time to apply a second color dye to a length of material moving along the predetermined path, and fixing the second color dye to the length of material. The dye is applied in a foam mixture having predetermined amounts of dye material, predetermined amounts of a thickening material, predetermined amounts of water and predetermined amounts of air processed in a mixing apparatus to develop a foam mixture.

Abstract: Method and apparatus to heat fix a heat fusible xerographic powder image to a final support material in which the powder image is first transferred to a final support material and the image-bearing support material then brought into contact with a bath of hot liquid metal for a period of time sufficient to fix the image to the support material. The temperature of the bath is maintained at a temperature high enough to fuse the image but below that at which the support material is damaged. The liquid metal bath has floating on it a layer of molten non-metal to prevent oxidating of the metal and to precoat the support material on its entry into the bath to prevent particles of the liquid metal from embedding in the support material. The relative high density of the molten metal acts as a wringer to keep the plasticized coating very thin when drawn out of the bath.This is a division of application Ser. No. 500,411 , filed Aug. 26, 1974.

Abstract: Coating apparatus for depositing multiple layers of superposed coating compositions onto the surface of a moving web which is substantially flat in the region of application of the coating compositions and wherein the web maintains a substantially gapless relationship to the apparatus.

Abstract: An improved process for coating sheet substrates with thermoplastic polymer is disclosed. In the process the sheet substrate forms one die lip of the extrusion coating die. The sheet substrate is passed from face-to-face contact with the metal block of the extrusion coating die into a spaced apart relationship with one die lip of the extrusion coating die, the sheet substrate forming the second die lip. Molten thermoplastic polymer is extruded into the space between the one die lip and the sheet substrate, thereby coating the sheet substrate with polymer. The preferred polymer is a poly-.alpha.-olefin, especially polyethylene or a copolymer of ethylene and butene-1. The preferred sheet substrate has orifices in the surfaces thereof. The process may be used to coat sheet substrates with a thermoplastic polymer, e.g. in the manufacture of form boards for the construction industry.