Abstract: An apparatus and method for continuously coating a bottom surface of a wear layer of a carpeting strip with latex foam during continuous manufacture of the carpeting strip and wherein such latex foam is cured to define a compressible backing material for the wear layer of such carpeting strip.

Abstract: Treating liquor is applied to open-width textile substrate by pressure feeding the liquor in foamed condition to a distribution chamber having gently changing cross sectional areas and contours and arranged to deliver the foamed treating liquor evenly widthwise of the substrate through an application head past which the substrate is caused to travel under conditions that result in liquefying the foamed treating liquor in the course of application to the substrate.

Abstract: In certain manufacturing operations materials are deposited onto semiconductor wafers. For example, in liquid-phase epitaxial melt deposition, wafers are exposed to a melt having constituents identical to the wafer material. In the past this has been accomplished by individually sliding the wafers into the melt and/or sliding portions of melt onto the wafers. This sliding creates a high amount of friction which in turns generates particles which can contaminate the melt. Also, this friction limits the number of wafers that can be simultaneously processed by sliding techniques. To avoid this a movable melt reservoir 62 is located above stacked stationary wafers 44. Prior to deposition, the melt 68 in the reservoir is separated from the wafers 44 by offsetting an aperture 64 in the bottom of the reservoir 62 from a passageway 58 leading to the wafers 44.

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: Applicator device for flowable reaction masses includes a crossbeam for distributing reaction mass and lines for feeding the reaction mass to the crossbeam, the crossbeam being formed with an inner hollow chamber communicating with the feeding lines for receiving reaction mass therefrom and an outer hollow space external to the inner hollow chamber, an inner wall separating the outer hollow space and the inner hollow chamber from one another, the inner wall being formed at uppermost locations thereof with overflow openings for passage into the outer hollow space of reaction mass fed by the feeding lines into the inner hollow chamber, and an outer wall at least partly surrounding the outer hollow space and formed with discharge openings for discharge of reaction mass received in the outer hollow space from the inner hollow chamber.

Abstract: Method and apparatus for avoiding undesirable wakes or blemishes in a coating of processing fluid deposited on a moving run of an exposed film strip. Such apparatus includes a doctoring surface which traverses the film strip at an oblique angle to the direction of film strip advancement for continuously urging and guiding particles carried by the film strip towards at least one of the longitudinal margins thereof and, hence, away from the useful intermediate portion of the film strip.

Abstract: Disclosed is an improved lithographic plate processing apparatus which comprises means for moving an exposed lithographic plate through the apparatus on an uphill slope, developer means within the apparatus for applying a developer liquid to the plate as it moves through the apparatus, and gumming means within the apparatus for applying gum to the plate after it has been developed, the gumming means including a baffle member under which the plate passes in contact and which forms a dam to hold a puddle of gum on the plate and against the baffle member, and spray means for spraying the gum onto the plate, the improvement comprising, as part of the gumming means, a rotatable gumming scrub brush between the baffle member and the spray means and in a position to scrub the plate when it passes thereunder.

Abstract: In apparatus for dusting an exposed upper elastomeric surface of a fabric reinforced vulcanizable tape, the tape is entrained about rollers such that a horizontal portion passes below at least one slit, of a feedbox containing zinc stearate, for spreading of the powder evenly on the tape, whereafter on a downstream portion of the tape which is inclined upwardly a brush serves to remove any excess powder from the dusted tape.

Abstract: In certain manufacturing operations materials are deposited onto semiconductor wafers. For example, in liquid-phase epitaxial melt deposition, wafers are exposed to a melt having constituents identical to the wafer material. In the past this has been accomplished by individually sliding the wafers into the melt and/or sliding portions of melt onto the wafers. This sliding creates a high amount of friction which in turns generates particles which can contaminate the melt. Also, this friction limits the number of wafers that can be simultaneously processed by sliding techniques. To avoid this a movable melt reservoir 62 is located above stacked stationary wafers 44. Prior to deposition, the melt 68 in the reservoir is separated from the wafers 44 by offsetting an aperture 64 in the bottom of the reservoir 62 from a passageway 58 leading to the wafers 44.

Abstract: A wallpaper paste applicator comprises a container having an inclined tray bottom portion along which a strip of wallpaper travels with its decorative surface facing downward. The paper is pulled through a slot in the forward portion of the apparatus formed by a vertically adjustable wall and the bottom of the tray. A quantity of paste is maintained on top of the wallpaper in the tray, and is distributed to the back of the paper by a flexible notched wiping bar.

Abstract: A method of depositing a plurality of epitaxial monocrystalline layers of semiconductive materials onto an individual substrate of a plurality of substrates via the sliding liquid phase epitaxy technique whereby the spacing between respective melt-containing chambers and respective substrate-receiving recesses are substantially equal to one another and, during the deposition stage, the temperature of all melts located on respective substrates is lowered a substantially identical amount so that a corresponding epitaxial layer grows on each such substrate.

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: A sheet material to be saturated with a fast-reacting saturant, approximately one minute at room temperature, passes under a trough positioned across the travelling web and having a longitudinal slot through its bottom. A threaded rod having a diameter larger than the slot width is laid over the slot in the trough. The fast-reacting saturant is supplied to a traversing dispensing device located above the trough. This traversing device dispenses the saturant into the trough. The threaded rod co-acts with the slot in the bottom of the trough to meter the amount of fast-reacting saturant flowing through the trough and onto the sheet material moving under and contacting the bottom of the trough.

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: Method and apparatus for the continuous production of transparent films, sheets, or plates of high optical quality are disclosed. Material in liquid form flows onto a substrate comprising a plurality of discrete, distortion-free panels, disposed in end-to-end abutting relationship and moved continuously beneath a flow head from which the material flows onto the panels. The panels move on a conveyor system that progressively slows the speed of the plates, so that leading and trailing edges of successive panels abut to form a continuous surface as the panels pass beneath the flow head. Yieldable, elastic sealing strips are placed between the panels to form a part of the continuous surface and to cushion jolts as succeeding panels are moved from the upstream end of the conveyor and come into contact with the continuous line of panels passing beneath the flow head.

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: A doctoring surface conformation for applicator nozzle structures in photographic film cassette contained processors by which a coating of processing fluid may be deposited on a moving run of an exposed film strip. The doctoring surface conformation is configured to present a plurality of relatively small entrance channels at the upstream or entrance end thereof and a single exit channel at the downstream or exit end thereof. In the preferred embodiment, the doctoring surface conformation is defined by a plurality of first inclined surfaces extending from the vicinity of the trailing edge of the fluid applicator nozzle and converging in the direction of film strip movement towards the surface of the film.

Abstract: A hand operated dry wall taping machine includes an elongated tubular main body portion to be held by the operator. A tape applicator head portion is disposed at the end of the machine adjacent the seam being taped. A supply roll of tape is carried from the tubular body. The applicator head includes a dry wall cement dispensing box through which the dry wall tape is fed. Cement is disposed from the box onto the side of the tape which is to face the wall being taped. A pair of tape drive wheels are carried forwardly of the tape dispensing box to engage the marginal side edges of the tape, to press the cement laden tape against the wall and to pull the tape from the supply roll through the applicator head and cement dispensing box. A quick disconnect couples the cement dispensing box and tape drive wheel assembly to the applicator head for ease of removal for cleaning. A slidable cover of the cement dispensing box is adjustable for controlling the thickness of the layer of cement deposited upon the tape.

Abstract: Substrate such as relatively porous, low thermally conductive materials are coated with molten lead, lead-base alloys, zinc, zinc-base alloys, tin, tin-base alloys, cadmium, cadmium-base alloys, aluminum, aluminum-base alloys and the like by spreading the molten metal by means of a low thermally conductive roll to provide products useful in sound attenuation, moisture and corrosion proofing and radiation shielding.

Abstract: A process for spreading foam material relatively free of undesirable air bubbles, blisters, and blotches, and substantially uniformly in thickness across the full width of continuously advancing sheet material comprising: supplying foam material having a predetermined density to a chamber for containing foam material: filling the chamber substantially completely with the foam material at the predetermined density; maintaining the predetermined density of the foam material in the chamber substantially constant from point of entry thereto to point of exit therefrom; delivering the foam material from the chamber and spreading it relatively free of undesirable air bubbles, blisters, and blotches, and substantially uniformly in thickness across the full width of continuously advancing sheet material; and regulating and controlling the amount and the thickness of the foam material being spread on the continuously advancing sheet material, the regulating and controlling taking place immediately following the deliver

Abstract: Thin epitaxial layers of Group III-V semiconductor materials are grown from solution with improved thickness reproducibility and surface smoothness by a method including the steps of preparing an ideally saturated solution of the semiconductor material in a metal melt preferably by keeping an undersaturated solution in contact with the crystalline semiconductor material at a predetermined temperature, supercooling the saturated solution and then bringing the supercooled solution into contact with a substrate. A growth boat assembly for this method has at least one set of two boats slidably stacked one upon another, wherein the upper boat has a solution reservoir and the lower boat has two depressions respectively for receiving therein the substrate and the crystalline semiconductor material as the source material at the saturation step, arranged such that a solution contained in the reservoir can selectively be contacted with either of the source material and the substrate and isolated from both.

Abstract: Tape and adhesive dispenser having adhesive-containing hopper with tape inlet and outlet openings adjacent lower wall of the hopper. Roll of tape is supported so that run of tape passes between openings and along upper surface of lower wall and collects adhesive thereon. Outfeed platform extends outwardly from outlet opening and has spaced edge guide means to restrain opposite margins of tape as tape passes along platform. Tape restrainer is mounted for rotation in direction of feed of tape above platform so that a lowermost portion thereof is spaced closely from the platform to permit tape to pass between platform and restrainer. The restrainer has clearance so that minimal adhesive is removed from tape as it passes beneath the restrainer. The restrainer is cylinder carrying pair of thin spaced discs, positioned adjacent central portion of tape to provide restraint at tape center. Two embodiments of self-threading means permit easy threading of tape.

Abstract: Device for the uniform application of liquid treating baths in the form of foam onto textile flat materials, consisting essentially of (a) elements for foaming the liquor under pressure, by a pipe-line for the foam linked to (b) a foam distributing and foam applying chamber, and immediately below, but not directly limited therewith, (c) elements for supporting and transporting the textile web in open width of the material.

Abstract: A method for independent control of a plurality of volatile dopants in liquid phase epitaxial fabrication of doped layers of semiconductors upon a semiconductor substrate, utilizes spatially separated sources of each dopant, each source being independently temperature controlled. One dopant source is located in a melt of a carrier metal and of the elements required to form the desired semiconductor material and has the saturation concentration thereof determined by the temperature of the melt, while the remaining dopant is vaporized to create a partial pressure thereof over the melt, with control of the source temperature controlling partial pressure and therefore concentration, which is less than or equal to the solubility of the remaining dopant at the melt temperature, in the melt.

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: A liquid phase epitaxial reactor is provided in which a simple cycling mechanism sequentially feeds semiconductor wafers from an input stack into a deposition region and thence to an output stack. In preferred embodiments, a cam is employed to tilt the output stack to accommodate the positioning of each successive wafer in the stack.

Abstract: A method and apparatus for the application of foam backing to a fabric web without the introduction of hose and streak marks on the fabric breaking. A foam pillow is established on a fabric web by confining it on two sides thereof with guide plates, and on the front thereof with a doctor blade or stationary roller. The web is started moving, whereby the pillow is caused to generally roll or rotate about a generally horizontal axis. A gap of predetermined size between the bottom of the doctor blade or roller and the top surface of the web allows only a portion of the foam from the pillow to adhere to the web and be carried along therewith, the foam providing a backing for the fabric. The volume of foam in the pillow is maintained by the introduction of new foam into the volume of the pillow at at least two points on either side of the pillow, to flow generally along the axis of rotation of the pillow.

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: A method of making a liquid phase epitaxial layer of gallium phosphide on each of two semiconductor wafers which are disposed above and below each other in parallel, and at a predetermined distance.

Abstract: The present invention is directed to an apparatus for coating a material length with a fluid substance which comprises a coating trough containing the fluid coating substance, a roller means rotatably mounted and adapted to be partially immersed in said fluid coating substance, the surface of the roller means and the edge of the trough defining an aperture for the dispensing of the fluid coating substance, said edge of the trough being provided with a liquid guiding element which extends in the downward direction from said edge and means for conveying the material length to be coated in close proximity to said liquor guiding element.

Abstract: In an epitaxial growth method in liquid phase for III-V compound semiconductor crystals a solution for crystal growth is at first heated to a temperature which is higher than the temperature of crystal growth, and then cooled to that temperature, whereby a part of the solution crystallizes out as small crystals. This solution is separated by means of a filter means into two parts, one of which contains the small crystals and the other of which does not. A substrate crystal is brought into contact with the latter.

Abstract: A method for the successive epitaxial deposition on a semiconductor substrate of a first semiconductor layer and at least one further semiconductor layer, said layers differing mutually as to at least their conductivity properties and having been obtained by crystallization from a material in the liquid phase, comprising the steps of providing at least during the whole period of the growth of said first epitaxial layer at least one dopant in a container which is present inside said space at a part thereof removed from said thermal radiation and is independent of the said crucible, said container being connected to means present outside said space for the independent movement of said container, after the growth of the first epitaxial layer arranging said container above said crucible and turning it upside down to provide to said material at least once an extra addition of said at least one dopant, and forming said further layer with said at least one dopant.

Abstract: A tray suitable for providing a uniform coating of predetermined thickness on sheet material includes a generally V-shaped trough for dispensing a fluid contained therein through a plurality of apertures formed through the bottom of the trough and spaced along its length. Along the outer surface of the apex of the V-shaped trough, there is formed a channel communicating with the apertures and defining a pair of spaced continuous blades extending along the length of the trough and spanning the apertures. The lands of material between the apertures of the trough are tapered to a point on the side of the trough adjacent the channel to provide a uniform supply of coating material within the channel. As the trough is moved across the surface of a sheet to be coated, the trailing blade which is spaced at a desired height from the sheet material, provides a uniform coating of fluid to the sheet.

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: There is described a device comprising, in combination with a wheel supported structure adapted to be moved on the road surface, an assembly having vertically elongated compartments for storage of long pot-life viscous components adapted to co-react when mixed together and to form promptly hardenable compounds adapted to form a layer on said road surface, to provide a sign thereon or to form a primer base for laying down and adhesively securing a tape thereto. The assembly also includes means for supporting and laying said tape on the freshly formed layer, as well as pneumatically operated motor and control means for controlling the movements and the sequence of operations of the device.

Abstract: In a method of providing a layer of semiconductor material on a flat side of a substrate from a solution which contains the semiconductor material, the substrate is provided in a recess of a substrate holder which closes the lower side of a reservoir containing the solution. By a relative displacement of the reservoir relative to the substrate holder, the said flat side of the substrate is moved below or away from the solution present in the reservoir. The flat side of the substrate is brought at a desired height relative to the lower side of the reservoir, solution from the reservoir is provided on the substrate and when the reservoir is removed relative to the substrate a quantity of solution of an adjustable height is left on the substrate.