Abstract: Method and apparatus for applying one or a plurality of superimposed layers of a photographic coating composition by the curtain coating method onto a moving support. The spacing between the edge guides, used to maintain the width of a curtain throughout its free fall from the coating hopper to the impingement line on the support, is arranged to coat less than the width of the support so as to provide an uncoated margin on the support. The curtain fluids are extracted from the edge region of the falling curtain by connecting a suction device to the edge guides near the point of impingement of the falling curtain, thus substantially reducing the thickness of the curtain at its edge region and thereby reducing the thickness of the coated edges.

Abstract: A method for uniformly coating a moving substrate by eliminating nonuniformities in the voscosity of the coating solution along the line where the solution is applied to the substrate. A viscosity-varying region is provided either inside or outside of a coating solution pocket in an extruder assembly. In one embodiment, the voscosity-varying region is provided by making the length of a slit through which the coating solution flows onto the support less than that of the pocket. In another embodiment, the viscosity-varying region takes the form of small-diameter tube through which the coating solution is supplied to one end of the pocket. In a third embodiment, a roller is disposed in the pocket and the diameter of the roller and the pocket are tapered towards the center. In a still further embodiment, the solution is supplied through a distributor.

Abstract: A coating method and apparatus in which a coating composition is applied from a hopper to a web continuously travelling on a backing roller. The backing roller is rapidly moved by a pneumatic mechanism relative to the hopper between positions at which the composition can and cannot be applied to the travelling web in order to avoid thick coating at a leading portion or at a spliced portion of the web.

Abstract: Apparatus and method for applying a coating material to a workpiece. The apparatus includes a coating material flow surface capable of supporting the workpiece. A coating material flow source provides substantially even flow of the coating material across the flow surface. The flow volume may be controlled by suitable means such as a variable speed pump. After flowing over the flow surface, the coating material drains into a drain vat. Portions of the workpiece to which coating should not be applied can be prevented from contacting the coating material by placing those portions over a drain edge of the flow surface.

Abstract: An upper crucible part comprises several chambers containing a supersaturated growth solution with which a semiconductor wafer is coated with a monocrystalline semiconductor layer by way of epitaxial growth. The semiconductor wafer is contained in a cassette-shaped lower part which is moved underneath the upper part. The coating itself is effected within a protective-gas atmosphere within a reaction space which, by a diffusion furnace, is heated up to a temperature which is very exactly adhered to.

Abstract: The crucible is of the type in which substrates to be epitaxially coated are disposed in a slide comprising a substrate carrier (7), whose displacement permits of bringing the substrates (9) successively into contact with different baths of epitaxy. It comprises a compartment (2), in which tightening slides (11) and solution-containing slides (12) are alternately stacked, each of the latter slides having a cavity receiving a solution (14) and merging at the lower part of the said slide (12). The tightening slides (11) close the lower part of the cavities (45). The slide comprising a substrate carrier (7) can be translated between a rear position in which it is disengaged from the stack and a front position in which, after having driven out the lower slide of the stack, it is situated under this stack.

Abstract: Horizontal slider for the fabrication of semiconductor devices employs a succession of reservoirs and wells for successive applications of material in the growing of multiple layer semiconductor devices. The apparatus is composed of three assemblies each of which is fabricated of graphite to avoid contamination of the semiconductor material. The apparatus is operated within a furnace wherein the temperature is varied between a relatively high temperature for providing saturated solutions, to a lower temperature during which epitaxial growth can occur, and ambient temperature for completion of a fabrication procedure. One of the assemblies contains a set of wells, a second assembly contains reservoirs and slides horizontally upon the assembly of wells for alternately communicating reservoirs with wells and terminating such communication for a filling of the wells with requisite melts.

Abstract: A method and apparatus for transporting work to be processed through a series of work processing stations by moving the work along a path extending past the stations to successive positions along the path opposite the stations, respectively, and at each position extending and retracting the work into and from the respective station for processing of the work therein. The present best mode practice and embodiment of the invention are designed to coat or plate the conductors and thru-holes of printed circuit boards with solder by mounting the circuit boards in rack-like work holders, transporting the work holders in succession from an infeed station to an outfeed station along a path extending over a series of tanks containing liquid baths of acid, rinse solution, flux, solder/oil and final wash, respectively, and extending and retracting each work holder downwardly into and upwardly from each tank to successively clean, rinse, flux, solder coat and wash the circuit boards.

Abstract: A method and mechanism to form minute drops of solder paste of uniform size spaced in desired patterns upon substrates of semi-conductor devices by extruding the paste under pressure through similar holes in a die while closely spaced above a substrate and, immediately after contacting the ends of minute columns of the paste with the substrate to adhere the same thereto, instantly raising the die to effect separation of the columns from the adhered ends on the substrates which comprise dots of paste of substantially uniform size which are spaced from each other. The paste is dispensed from a shallow reservoir above the die and defined by a flexible diaphragm positioned in opposition to the die and against which a pressure member operates against the diaphragm and paste contained in the reservoir to effect discharge of the paste under pressure as described above.

Abstract: An apparatus for manufacturing a laminated unit of ceramic green sheets comprises an endless belt, and an applying apparatus provided at a predetermined position on the running path of the endless belt. The applying apparatus includes a reservoir for storing a ceramic slurry and a moveable blade. When the belt runs with the blade spaced a predetermined distance from the top surface of the endless belt, the ceramic slurry flows out through a gap between the blade and the belt and, thus, is applied on the belt to a predetermined thickness. The applied ceramic slurry is dried by a drier so as to form a ceramic green sheet. A conductive paste is printed on the top surface of the ceramic green sheet by a printing apparatus. The printed conductive paste is dried by a drier.

Abstract: A slider/stator device for the growth of thin film material, such as mercury cadmium telluride, in which the substrate, thin film and growth solution are kept free from impurities by use of sleeves, made, for example, from sapphire, in order to prevent contamination and adhesion of the growth solution to the slider assembly.

Abstract: A method for manufacturing a thick asphalt sheet comprises preparing a thick sheet material made of non-woven fabric of synthetic material, passing said sheet material through at least one pair of pressing rolls from the upper side to the lower side and feeding and storing molten petroleum asphalt into a concavity formed on the upper side of said pair of rolls, whereby the molten petroleum asphalt is pressed into the sheet material when said material passes through said pair of rolls, thereby forming an asphalt sheet. The asphalt sheet thus manufactured is immediately led onto a processed ground surface to form a waterproofing layer thereon.

Abstract: A capped printing plate making machine is used for making flexographic capped printing plates. The machine includes a pair of troughs for applying two layers of photopolymerizable resin materials simultaneously. The troughs are so designed that actuation of one trough to permit its material to be applied automatically results in the other trough being positioned and opened for the application of its material.

Abstract: Improved installation (10), whereby in a first section (22) coating (24) is applied on substrate (14), moving through a passage (16) under double floating condition, in a following section (26) a layer fluid (28) is applied on said layer coating (24) and in the following sections (30) and (32) the removal takes place of said fluid layer with thereafter a drying of the remaining coating layer.

Abstract: Apparatus for carrying out liquid phase epitaxy growth comprising a melt holder having a predetermined number of cells for liquid phase melts for growing a number of epitaxial layers on a horizontally disposed substrate. The substrate is supported by a holder which is displaceable in order to bring the substrate into successive contact with the melts. A melt filler is disposed above the melt holder and contains a number of compartments corresponding to the number of cells in the melt holder and of greater volume than that of the cells for storing batches corresponding to several melts, the melts being supplied from the compartments to the cells through a displaceable perforated plate. A melt collector is arranged beneath the melt holder for collecting the melts from the cells.

Abstract: In a covered graphite slider apparatus for the liquid phase epitaxial growth of mercury cadmium telluride this invention shows the addition of a wipe-off well into the moving part of the slider apparatus, which well contains pieces of CdTe to assist wipe-off of HgCdTe following LPE growth.

Abstract: A device for applying a treatment medium, especially in foam form, to a running web of material, especially a rug web, with an application beam extending transversely to the web of material, the application beam having a longitudinal slot, through which the treatment medium emerges onto the web of material. On the side opposite the slot an elastic cushion which presses the web of material against the sliding surface of the application beam is arranged on the back of the web of material. The cushion may be an inflatable elastic hollow body or a foam material cushion.

Abstract: A chamber block for a centrifuge is provided with an inlet orifice, inlet channel, outlet channel and outlet orifice through which a sample of cells and supernatant may be centrifuged onto a deposition surface. The chamber block includes a recess sized to receive a plug of an absorbent material which withdraws excess supernatant from the deposition surface.

Abstract: An improved melt dispensing liquid phase epitaxy (LPE) boat is disclosed. It comprises two separable compartments. A supply-melt reservoir and a growth-melt bin separable by means of a separation slider for separating the two compartments prior to the actual process of epitaxial growth. In a further improvement, the substrate holder has a melt collection bin for receiving used growth-melt.

Abstract: A size press, which comprises three coating rolls (11, 12, 13). These rolls (11, 12, 13) form two press nips (N.sub.1, N.sub.2) as pairs with each other, the paper web (W) to be treated being passed through the said press nips. Both sides of the web (W) are treated in the said nips (N.sub.1, N.sub.2). Out of the said coating rolls, regarding the position of altitude, the uppermost roll (12) has been arranged as the center roll of the size press, in connection with which center roll the two coating nips (N.sub.1, N.sub.2) are formed so that the first coating nip (N.sub.1) is placed at a short angular distance (.alpha..sub.1) underneath the horizontal plane (H--H) placed through the axis of the said center roll (12). The second coating nip (N.sub.2) is formed by the third coating roll (13), which is placed substantially in the vertical plane (V--V) placed through the center point of the center roll (12) or at a small angle (.alpha..sub.2) after the said plane. As preceding the first nip (N.sub.

Abstract: A solution growth apparatus for conducting an epitaxial growth of a compound semiconductor crystal from solution by relying on the temperature difference technique at a constant growth temperature and on a mass production scale without deranging the control of the growth temperature applied externally of the growth apparatus and with the application of only a small heating power and only a small cooling power, by enhancing the thermal exchange efficiency through the provision of heating means, via an insulator, for the melt-containing reservoir provided on the growth boat housed within a quartz reactor and by the provision of cooling means at the bottom of the boat within the reactor.

Abstract: Apparatus for the coloring or tinting of one or more selected areas of a soft or flexible contact lens to precise measurements comprises a support means formed to closely match one of the surfaces of the lens and a mask means adapted to operatively associate with the support means to delineate said one or more selected areas by providing one or more peripheral zones of compression within the lens to prevent the migration of an applied coloring or tinting medium thereacross. In use the lens is positioned on the support means so that one of the surfaces thereof closely matches the support means, the mask means is arranged to provide one or more peripheral zones of compression delineating said one or more selected areas, and a coloring or tinting medium is applied to at least one selected area.

Abstract: At least one ribbon-like stream of a first coating composition adjacent to and in edge contact with at least one second ribbon-like stream of a second coating composition are deposited on the surface of a support member by establishing relative motion between the surface of the support member and the ribbon-like streams, simultaneously constraining and forming the ribbon-like streams parallel to and closely spaced from each other, contacting adjacent edges of the ribbon-like streams prior to applying the ribbon-like streams to the surface of the support member and thereafter applying the ribbon-like streams to the surface of the support member.

Abstract: A method and an apparatus for applying an emulsion onto a screen printing plate are disclosed, in which two squeegees are arranged on either side of the screen, one squeegee of which is directed to the applying operation and the other squeegee is directed to the scraping and recovering operation. In accordance with the invention, a high quality screen printing plate may be obtained and very convenient operation and handling may be achieved.

Abstract: Coating apparatus for slide, extrusion or curtain coating of one or more liquids on a moving web in which the metering orifice for each fluid to be coated is filled with a porous plug.

Abstract: In LPE boat-slider apparatus the boat, which carries the melts, is made of lower thermal conductivity material than the slider, which carries the substrate. Illustratively, the boat comprises sapphire and the slider comprises graphite. A confined-melt geometry is also described in which another slider, used to skim off thin portions of the melt, is also made of the lower thermal conductivity material.

Abstract: Apparatus for applying foam onto continuously advancing webs of material in which several nozzles are provided which are connected to a foam distributor which comprises a chamber with foam outlets as well as a distribution rotor which rotates in the chamber and is in communication with a foam feed line directing the foam from the inside toward the foam outlets.

Abstract: An apparatus and method is disclosed which will rapidly provide a uniform layer of photopolymerizable material for a printing plate. A regulated flow of liquid photopolymerizable resin is supplied from an external reservoir into a manifold which is approximately C-shaped in cross-section and has one at least partially open side face. A gate is disposed before the open side face of the manifold and this gate is vertically adjustable so that together the gate and open side face define an orifice slot or passageway from which a uniform curtain of the resin may flow onto a platemaking surface. The manifold member has a downward projecting wedge shaped lip which acts as a doctor blade on the liquid resin layer deposited as the manifold is moved across the plate-making surface.

Abstract: A slide coating apparatus wherein the angle between the slide surface and a horizontal datum plane lies within a range from 35.degree. to 50.degree. and wherein the takeoff angle defined between a tangent to the coating roll and the slide surface lies within a range from 85.degree. to 100.degree..

Abstract: An improved method of coating one or more layer of a coating liquid onto a moving substrate from a coating hopper wherein coating bead of the coating liquid is formed and a part of the bead is formed at a side of entering of the substrate with respect to an efflux end of the coating hopper, and an end of the part of the bead being in contact with the coating hopper is held at a fixed position.

Abstract: A thermo-engraving machine has safety, energy conserving and convenience features. The thermo-engraving machine receives a freshly printed sheet, passes it through a device for depositing powder. It heats the powder to cause the powder to melt, then cools the sheet to create raised printed material. The deposition device in one case is a tank with a vertical partition that provides separate containers for powders of different types. The other deposition device is a cyclone type that is pivotal to allow easy cleaning and has toothed wheels in its suction manifold to retain the sheets. The oven has sidewalls that will laterally move to vary the width of the oven. Heater elements in the oven can be selectively turned off for smaller widths. The oven is held by a latch that releases the oven to spring upward should electricity be cut off to the solenoid that holds the latch in position.

Abstract: An apparatus for substantially eliminating excessive edge growth in liquid phase epitaxy utilizing a substrate carrier 11 and a source material carrier 13 slidable over the substrate carrier 11 including a well 24 around a recess 14 in the substrate carrier 11 wherein the substrate 16 is held. The well 24 contains a material therein which reduces the heat loss from the edges of the substrate 16 held in the recess 14 thereby reducing excessive epitaxial growth around the edges of the substrate 16.

Abstract: An insert is sized for close-fitting reception into either a distribution channel or a standardized receptacle formed in an extrusion coating die to define a distribution channel dedicated to a particular coating fluid.

Abstract: Coating apparatus includes three coating rollers, in a closed group, forming two coating nips with each other. First coating supply apparatus is provided on the first coating roller, followed by knife or doctor coating apparatus. Second coating supply apparatus is provided on the second roller after the first nip, followed by knife or doctor coating apparatus. After the second roller, the paper web runs through a second nip formed by the second roller and a third coating roller. The coated web is released from the third coating roller and transferred to drying apparatus, for example. If necessary, heating apparatus is provided at the first and second coating rollers for drying the web and the coating agents by heat radiation without contact with the web.

Abstract: A device for simultaneously producing a plurality of substrate disks each having a plurality of different layers by a liquid phase epitaxy as each substrate disk is moved sequentially through different melts contained in the liquid phase characterized by a first unit having tongues slidably received therein and a plurality of chambers spaced along the direction of sliding of said tongues, a second unit having a crucible for each of said chambers being disposed for relatively movement on the first unit from a position with the crucible out of communication with the chamber to a position in communication for transferring the melt from the crucible to the chamber and each of the said tongues having aligned recesses for receiving the substrate disk so that a row of substrate disks can be passed from one chamber to the next following chamber so that the disks in each row receive epitaxial layers sequentially.

Abstract: A boat for use in the epitaxial crystal growth of two layers on multiple substrates includes a structure where the substrates are located in a cavity in a support layer of the crucible structure, and a slide layer having two reservoirs is provided thereover. The two reservoirs contain the respective liquid solution for the two epitaxial layers to be provided, and the two reservoirs are respectively provided with the slide layer being the bottom layer of one reservoir and a removable sealing element being the bottom layer of the other reservoir. Upon moving the slide layer over the bottom supporting layer, the multiple substrates in the cavity are provided with liquid solutions to obtain epitaxial growth.

Abstract: In the coating of a strip article of indeterminate length, wherein the article is continuously advanced lengthwise past a dam while liquid coating material is supplied to a major surface of the article ahead of the dam, the article is passed through a gap of extended length immediately beyond the dam, the gap being defined between uniformly spaced walls one of which faces the article surface bearing the coating material. The spacing between the gap walls is equal to the thickness of the strip article plus a desired wet thickness of the layer of coating material. Coating material of different colors or shades may be supplied to different portions of the strip surface for producing coatings of varied patterns.

Abstract: A machine for applying cement in the corner between the unwiped portion of the margin of a shoe upper mounted on a last and the corresponding portion of the periphery of an insole located on the last bottom by a pair of nozzles that each has a laterally projecting tip wherein the toe portion of the upper margin has been wiped against and secured to the insole and segments of the upper margin at the boundaries between the wiped and unwiped margin portions overhang the insole. The nozzles are caused to apply cement in the corner while moving from the heel end extremity of the corner to locations beneath the margin segments, after which the nozzle tips are moved inwardly of the segments and are then moved away from the insole. The nozzles are placed at the heel end extremity of the corner by being moved downwardly against the insole while the tips face the heel and extremity of the insole and are then moved heelwardly to positions wherein the nozzles are proximate to the heel end of the upper margin.

Abstract: The invention relates to an apparatus for coating moving strips with several layers, in particular for coating photographic films and papers with photographic emulsions and layers, the apparatus consisting of a coating block comprising several profiled parts screwed together by means of contraction anchors and the invention relates to a process for joining the profiled part together to form a coating block.

Abstract: Hg.sub.1-x Cd.sub.x Te is an important semiconductor for use in photovoltaic and photoconductive infrared photon detectors. Hg.sub.1-x Cd.sub.x Te can be grown by liquid phase epitaxy at atmospheric pressure from a Te-rich solution in which case the Hg vapor pressure is below 0.1 atm at 500.degree. C. This low vapor pressure makes possible the use of open-tube, slider growth techniques. The present invention describes a covered graphite slider system which provides an additional source of Hg, minimizes loss of Hg from the source wafer and virtually prevents loss of Hg from the (Hg.sub.1-x Cd.sub.x).sub.1-y Te.sub.y growth solution.

Abstract: An improved apparatus for the continuous treatment of webs of materials such as textile materials with a foamed treatment medium. The apparatus includes a rotating cylinder, the length of which is at least equal to the width of material being treated and the circumference of which engages the web over a portion of the cylinder. The web is looped over the cylinder in a looping region and the apparatus further includes a foam feeding device which transfers foam to the web in a transfer region at the circumference of the cylinder. The improvement of the invention comprises a foam feeding means which includes a foam chamber disposed adjacent the cylinder at the looping region, the looping region being located at a side of the cylinder which descends during rotation of the cylinder. The foam chamber opens adjacent the web at the looping region and a wiper is disposed at the lower end of the foam chamber parallel to the longitudinal axis of the cylinder.

Abstract: A method of forming, by melt-spinning techniques, a laminated ribbon structure consisting, for example, of a semiconductor disposed on a metal ribbon substrate. The substrate may be 10-50 .mu.m thick and the semiconductor may be 10-50 .mu.m thick, for example; typically the ribbon width is about one millimeter to several centimeters.

Abstract: Flat printing screens can be coated on one or both sides by the method and apparatus. A liquid is applied to a screen by one or two squeegees secured to carriages moved up and down on rubber sprocket belts driven by a motor. The speed of application can be adjusted according to the desired thickness of the coating and the viscosity of the liquid. The squeegees are mutually offset somewhat in height to reliably prevent the liquid from running out when the squeegees are not in motion. Application takes place regularly and reproducibly even in the case of a thick coating. The drive by means of rubber sprocket belts and a counterweight ensure vibration-free movement of the squeegees along the screen.

Abstract: An apparatus for producing a semiconductor device of epitaxial growth on a substrate utilizing successive solution growth, in which materials to be successively deposited are being dissolved in bore portions respectively interconnecting between holes of the higher temperature portion and holes of the lower temperature portion in a boat, and in which a cooling jig is coupled with the substrate provided at the hole of the lower temperature portion to effectively conduct substantially main part of heat of the dissolved materials through the substrate.

Abstract: A liquid-phase epitaxial growth device has a reservoir holder (1), a slider (14) movably mounted below the reservoir holder to enable each reservoir (2, 3, 4, 5) to be selectively uncovered so as to allow semiconductor melt in each reservoir to pass through each aperture (15, 16, 17, 18) in the slider, a movable substrate holder (22) for receiving one or more semiconductor substrates (25, 26) that are placeable below each aperture, and a member (19) for receiving semiconductor melt from each aperture when it is uncovered by movement of the substrate holder. A locking mechanism (30, 31, 32, and 33) enables the slider to be locked to the reservoir holder at one or more substantially fixed positions.

Abstract: In the coating of a strip article by continuously advancing the article lengthwise past a dam while applying liquid coating material to a major surface of the article ahead of the dam, and advancing the article surface past a facing wall of extended length immediately beyond the dam, the article is restrained against movement away from the wall by an endless surface moving in the same direction and at the same rate as the article. The liquid coating material, in contact with the article major surface ahead of the dam, is fully confined within a reservoir or trench to which the coating material is supplied under positive pressure to maintain the reservoir or trench continuously entirely filled therewith.

Abstract: An apparatus for processing exposed photosensitive film sheets. A liquid used to develop the images on an exposed element as it is transported through the apparatus flows from a trough located above the path of transport. The liquid passes through a screen as it is introduced to and as it flows from the trough.

Abstract: Method and apparatus for coating both sides of a moving web and for independently controlling the coatings' width, thickness and uniformity of thickness along the length of the web. A moving web is supported on a backing surface. Two stationary and pliant smoothing films are positioned one adjacent each surface of the web, including the web surface which is supported by the backing surface. A coating liquid is metered to each side of the web at the confluence of the web and the two smoothing films, the respective metering rates being selected to produce a desired respective coating width. A pliant pressure generating means, in the form of a membrane holds a length of one smoothing film against the moving web with a static force whose magnitude is selected in accordance with a desired coating thickness. The relative position of the backing surface and the pressure generating means determines the length of coincidence of the moving web, coating liquid, stationary smoothing films and pressure generating means.

Abstract: Extrudable materials which exhibit a decrease in viscosity as the shear rate is increased, such as magnetic dispersion striping materials, are extrusion coated in the form of a narrow stripe. The stripe has predetermined uniform cross-sectional dimensions including substantially uniform thickness, and is coated onto a moving web by means of a die maintained in a predetermined spaced relation with the web. The die has two or more bores through which the extrudable material is extruded in columns onto the moving web to form the stripe thereon.

Abstract: A centrifuge rotor is described which facilitates the preparation of cell dispersions on microscope slides. The rotor is bowl-like in configuration and defines plural peripheral regions adapted to receive the slides and a removable sample chamber associated with each slide. Each chamber has an outlet adpated to contact its slide. A sample, containing blood cells, for example, may be placed in a chamber and the cells centrifugally sedimented against the slide associated therewith. Excess or unwanted fluid is removed from the chamber by applying a vacuum through a vacuum line and hollow drive shaft. Leaf springs maintain each chamber in position and the vacuum line in fluid contact with the chamber. The vacuum line conecting each chamber cooperates with its leaf spring such that if a chamber is missing, the leaf spring closes the vacuum line.