Abstract: A method and apparatus for enrobing confections with an enrobing material by conveying the confections along a conveying path over which two transversely extending curtains of enrobing material are directed. Between the respective curtains a first downwardly directed air curtain is provided for smoothing a first layer of enrobing material, and downstream of the enrobing device a second air curtain is provided for smoothing a second layer of the enrobing material and to remove excess enrobing material from the confections. A bottom coating station is provided wherein the confections are guided through an enrobing material containing pan to provide substantially complete coverage of enrobing material over the surfaces of the confections.

Abstract: A coating apparatus for forming a curtain film of uniform thickness on a suitable substrate, particularly for production of recording/reproducing media such as photosensitive and magnetic media. Jets of an auxiliary liquid are provided in the vicinity of a lip portion of a liquid pouring device which pours the coating film on the substrate. The jets expel an auxiliary liquid which does not affect the characteristics of the coating film, but which does prevent thinning of the curtain film in the vicinity of edge guides of the apparatus. Depending on the height of the curtain film, more than one set of jets may be provided along the length of the curtain film.

Abstract: A method of curtain coating that applies a free falling curtain of liquid coating composition onto a running support is disclosed. In the method, the sides of the support parallel to the running direction of the support are bent downwardly before the curtain is applied, and thus are not coated, and are subsequently unbent.

Abstract: An apparatus for coating both sides of boards, in particular, printed circuit boards includes a conveyor and a liquid coating station. The apparatus may include a station for feeding boards to the conveyor and particularly to a movable board holder configured to grip the circuit boards at their outer edges. The coating station located in the conveyor path coats the boards one side at a time. A board rotating station is located at one end of the conveyor and a board drying station is configured to simultaneously dry both sides of the boards.

Abstract: Webs coated with several layers, of which the lowermost or uppermost layer contains an instant hardener, may be produced in a single operation by curtain coating using a V-coater when the hardening layer is guided at the negatively inclined sliding surface of the V-coater while the other layers are guided at the opposite sliding surface of the V-coater and the hardening layer is combined with the remaining layers at coating edge to form a layer packet which is applied as a free-falling curtain to the web to be coated.

Abstract: A coating method and apparatus in which a freely falling film of a coating solution is applied to a web moving along a continuously rotating backing roll. The film width is wider than that of the web. The coating solution is removed from the backing roll by a cleansing device such as one that applies a solvent to the backing roll and then suctions the solvent and coating solution from the backing roll.

Abstract: A curtain-type coating liquid application device having a slide hopper and an application start plate used to prevent an increase in the thickness of the initially applied portion of the liquid on a web to thereby make the initial coating portion flat and smooth. Liquid freely falling in the form of a thin curtain from the slide hopper is caused to collide against the web continuously moving around a backup roller so that the liquid is applied to the web. The application start plate is curved or bent and is turnable about a fulcrum located under the backup roller. The application start plate also has an upper end extending at an oblique angle to the direction of width of the curtain, or it may be provided with a curtain receiving part at the upper end of the plate.

Abstract: A multi-layer coating method in which a first layer is first applied to a moving web and is allowed to partially dry before a second layer is applied as a freely falling coating composition film.

Abstract: The present invention relates to a process and device for applying a reaction mixture to a moving base. The key to the invention resides in the use of compressed air to ensure even distribution of the mixture. The reaction mixture is applied via an elongated pipe-like applicator vessel which extends laterally across the moving base. A cushion of compressed air is maintained in the applicator vessel above the reaction mixture.

Abstract: A method and implementing apparatus for electroless plating an optical disk causes the disk to be positioned in a container with its main surface upturned and then rotated. As the disk rotates, liquid for treating or cleaning the disk is caused to fall on the upturned main surface from a position above the disk.

Abstract: A severing organ for trimming the width of a curtain of coating material poured onto an impingement site on a substrate, in particular a printed circuit board, to be coated and being moved at a distance below the foot end of the severing organ transverse to the direction of the flow of the curtain consists of a single separating element whose upper end is designed as a knifelike sharp severing edge.

Abstract: The start-up of a free-falling liquid curtain (12) in the coating of objects or a moving web (18) using curtain coaters is considerably improved by the controlled retraction of a catch pan device (30) positioned in close proximity to the moving web (18). The catch pan device which includes a primary lip (32), and a secondary lip (44), is positioned so that it can be retracted through the falling curtain at a predetermined speed and direction relative to the moving web (18). The device (30) is retracted at the start of a coating process so that the falling curtain is interrupted first by primary lip (32) and then secondary lip (44). Primary lip (32) prevents the coating liquids from flowing onto the moving web (18) during the start-up process and secondary lip (44) retains the coating liquids of an extended falling curtain resulting from contact between the curtain and primary lip (32).

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: Plastic containers are given a coating of barrier or other coating material by being passed in close proximity to the lower edge of a plate curved downwardly. Liquid coating material is delivered to the back of the plate, to spread over it and fall as a curtain through which the article is passed, the article being rotated to present the whole of its recipient surface to the curtain. The articles may be tilted as they pass through the curtain.

Abstract: Apparatus for regulating the flow of a fluid from a supply conduit at one end of an elongated housing to a nozzle having one or more orifices extending longitudinally of the housing has a partition which is installed in and divides the interior of the housing into a first compartment receiving fluid from the conduit and a second compartment communicating with the orifice or orifices of the nozzle. Two marginal portions of the partition are adjacent the bottom wall of the housing at opposite sides of the nozzle and define with the bottom wall a number of paths in the form of passages and/or channels for the flow of fluid from the first compartment into the second compartment. The inclination of the marginal portions of the partition relative to the bottom wall of the housing is adjustable by hand or by one or more motors to thereby select the rate of fluid flow along the respective path or paths.

Abstract: A process for forming a multilayered coating film is disclosed, comprising forming a liquid film of a coating composition, increasing the viscosity of the liquid film, and laminating the liquid film having an increased viscosity onto a support or onto a coating film on a support. A multilayered coating film can thereby be formed easily and efficiently without involving interlaminar mixing between adjacent layers.

Abstract: The dielectric layer or layers in a ceramic capacitor having at least one buried electrode is deposited by a curtain coating process that includes obtaining a measure of the ceramic-paint-curtain thickness. A source of electromagnetic radiation, e.g. in the infrared range, is directed equally near the left and right edges of the curtain, and detectors at the opposite curtain surface side pick up the difference in the radiation transmissivity which is a measure of curtain thickness assymetry left to right. By adjusting the paint reservoir from which the curtain issues to make the difference zero and the curtain symmetrical, uniformity in paint coating thickness is achieved.

Abstract: To forge billets, the billets are fed end-to-end along a path which leads to a coating tank containing a lubricant and then through a heating station to a forging station. Within the coating tank, the line of billets is made to undergo a change of direction for example by passing over a hump in the feed path, such that an angular separation is created between adjacent end faces of successive billets. In this way, a better coating of the end faces of the billets is achieved.

Abstract: A deflecting device includes a deflecting electrode (13), which is disposed at a spacing below a lip nozzle (11.1), from which the viscous coating material (10.2, 10.1) flowing freely in the form of a sheet is emerging, and which extends over the entire width of the coating material sheet. This deflecting electrode includes an electrode arrangement (31), the exposure region of which facing the sheet surface is subdivided into a number of electrode elements (33) which taper outwardly to a point. When placed under a voltage, the electrode arrangement (31) provides an ion stream directed towards the surface of the coating material sheet. The impact of this ion stream on the surface of the coating material sheet (10.2) imparts to the latter a change in direction (.alpha.) towards the deflecting electrode (13), so that a flat substrate (5.1) running horizontally towards the deflected coating material sheet (10.1) impinges on the sheet (10.1) at an acute angle (.beta.). The impact of the substrate (5.

Abstract: A liquid applicator for a wide length of material, operating according to the overflow principle, has a construction which ensures uniform dye application over the operating width. This applicator now makes it possible to effect quick color change, because the capacity of the applicator is smaller than 5 l/m and, by a special arrangement of liquid-distributing chambers in the applicator, a uniform liquid film exhibiting laminar flow is ensured.

Abstract: The present invention relates to a curtain coating apparatus by which a foamable or foaming material is conveyed from a mixing apparatus through a distributor comprising a plurality of conveying tubes to a curtain coating slot. The apparatus comprises homogenization means for agitating the mixture such that the merging streams of foamable or foaming material are intermixed so as to provide a substantially uniform material which emerges from the curtain coating slot.

Abstract: A liquid stream 2 from a nozzle 1 is atomized and distributed over a substrate 3. The liquid falls into a downwardly angled chute 10 formed by strong gas jets focussed to a point X. An air-knife 20 directed vertically downwardly in the plane of X atomizes the liquid.Gas-knives 12 and 13 are fired alternately and apply equal but opposite deflections to the liquid, which however remains in the plane of 20. The liquid is then evenly distributed on the substrate 3, which is advanced intersecting the plane of 20.

Abstract: Method and apparatus for curtain coating a flexible web by coating the curtain at a width wider than the width of the web. The margins of the web are preserved from being coated by conveying the web in the coating zone over a web supporting roller than does not support the web margins, and by deflecting the unsupported web margins downwardly by means of curtain interceptors that remain in contact with the web under the elastic recovery forces in the web material.

Abstract: The present invention relates to a curtain coating apparatus by which a foamable or foaming material is conveyed from a mixing apparatus through a distributor comprising a plurality of conveying tubes to a curtain coating slot. The apparatus comprises homogenization means for agitating the mixture such that the merging streams of foamable or foaming material are intermixed so as to provide a substantially uniform material which emerges from the curtain coating slot.

Abstract: Tough heat- and corrosion-resistant films of polytetrafluoroethylene (PTFE) are baked onto the surfaces of sheet-type gaskets in a curtain coating process. The gasket to be coated is passed through a flow of liquid PTFE-resin containing composition, the gasket inverted end-for-end, the opposite side coated, then baked, to form a tough film.

Abstract: Disclosed is a process and an apparatus for coating with a material a plurality of containers transported consecutively, in which after the completion of coating with the material flowing down of the uppermost container of the containers being transported vertically, the subsequent container becomes the new uppermost container which will be subject to next coating with the material.

Abstract: A pouring head is arranged above a conveyer belt which carries objects to be coated with a coating material being poured from the pouring head in the form of a curtain extending transversely to the direction of travel of the belt. In order to limit the free falling curtain on both sides two rim severing organs are provided on each side of the curtain, one organ above the other, as well as curtain edge-guiding means, one for each severing organ, which are arranged each adjacent the severing organ to which it pertains. The lower severing organs are arranged a short distance above the conveyer belt.The two severing organs comprise blades for cutting off marginal strips from the falling curtain in two successive stages, thus reducing the width of the curtain to a desired size.

Abstract: An applicator for curtain-pouring plastics or the like material of pourable consistency in which a base plate contains, inserted in a recess thereof, an applicator die block provided with a slit-shaped pouring orifice. On the base plate there are articulatedly mounted two half shells, forming an applicator head and adapted to be spread apart, and sealed with each other and with the base plate by means of sealing strips. Thus, there is no need for a re-adjustment of the orifice after each opening of the applicator head. Also, the width and/or length of the orifice can be readily changed by exchanging the applicator die block, and the entire structure is simple and of relatively low cost.

Abstract: A device for applying a flowable fat composition to objects, especially chocolate compositions on candy, baked goods, etc. The chocolate composition is kept in a container, which has at its lower end an outlet opening above the objects to be coated. A roller rotates at relatively high speed in the opening. That part of the surface of the roller, which is immersed in the container, picks up chocolate composition and releases it at approximately its lowest point. The thickness of the chocolate composition film, transported on the roller, is determined by an edge fixed to the container. The separation of the composition film from the roller is aided by a doctor blade. The thickness of the composition film on the roller, the rotational speed of the roller, and the distance between the roller and objects to be coated are selected, so that a bubble-free composition film is transported on the roller and new bubbles do not form in the chocolate composition on the way from the roller to the objects to be coated.

Abstract: A coating apparatus including a lip body for the leaving therefrom of the coating composition forms a very stable and uniform curtain if such lip body determines a negative (front) slide surface associated with a back negative surface.

Abstract: An elongated manifold is supplied with either foam or liquid under pressure through a plurality of inlet ports spaced along the manifold. The manifold contacts a curved blade along a line substantially parallel to, and below the elevation of, the crest of a horizontally disposed curved blade. The manifold is provided with outlet means above the line of contact whereby foam or liquid discharged from the manifold builds up behind the blade's crest until it overflows the crest to flow as a uniform film onto a web moving past an edge of the blade.

Abstract: The stabilization of free-falling liquid curtains (4) in the coating of objects or webs (5) using curtain coaters is considerably improved by the use of curtain holders (9) from which an additional auxiliary liquid (11) issues towards and combines with the curtain (4), for laterally guiding the free-falling curtain (4) formed at the coating edge (3) of the coater. Triangular liquid bridges (14) are thus formed between the curtain (4) and the curtain holders (9) from the coating edge (3) to the point where the curtain (4) impinges on the layer support (5). The curtain holders (9) consist of tubular hollow bodies with a delivery spout (10) and a distributing passage (12) for the liquid (11) and an exit slot (13) or of a porous tubular material without any exit slot (FIG. 3).

Abstract: A method and apparatus are disclosed for enrobing frozen novelty confectionaries, such as ice cream products. The products are passed beneath a waterfall of the enrobing material, with the conveying mechanism separating rows of confectionaries and aligning them with dams in the waterfall to avoid covering the stick portion of the novelty. Conveying apparatus for the novelties is also disclosed.

Abstract: A process is taught in which a flexible, reinforcing travelling web may be uniformly, thinly transfer-coated, on both sides of the web simultaneously, with a low-viscosity liquid or mixture of monomers which may or may not wet the web, but does not wet the surface of a substrate on which the web and mixture are deposited. The liquid or mixture is first curtain-coated on an applicator curtain against which the web moves in controlled contact. An apparatus is provided for transfer-coating a travelling web with a low-viscosity liquid which is first curtain-coated on an applicator curtain.

Abstract: Apparatus for coating a travelling web with at least one layer of a liquid coating composition, such as a binder, as the web is moved along a path through a coating zone by way of a formation at the coating zone of a free-falling vertical curtain which extends transversely of the path of travel and impinges the travelling web to deposit the coating thereon. A lip is provided in cooperation with an air pressure chamber so as to control the discharge of the binder onto the slide or face of an inclined wall and thence onto the web. The lip is adjusted uniformly across the machine width with a mechanical jack arrangement and it is also variably adjusted laterally of the machine width by means of spaced microjacks so as to permit the discharge of variable amounts of the composition across the machine in accordance with the lip opening set by the respective microjacks.

Abstract: Method and apparatus for the surface-hardening treatment of a synthetic resin article is provided, wherein the article is brought into countercurrent contact with a freely falling liquid film of a surface-hardening solution while the article is gradually pulled up thereby to be coated with the surface-hardening solution, and then, the coated article is irradiated with ultraviolet rays to cure the coating. The article is conveyed to a hardening solution tank by a first conveyor where the surface-hardening solution is caused to flow down on downwardly inclined liquid film guide plates attached to the hardening solution tank, at a flow rate of 2 to 15 ml/sec.multidot.cm of the width of the guide plate. The countercurrent contact of the article with the liquid film is initiated at a point 3 to 30 mm apart from the flow-out end of the guide plates. The hardening solution is circulated to effect the temperature adjustment and filtration.

Abstract: Either foam or liquid is supplied under pressure to a distributor having a plurality of outlets each connected to a respective passageway extending along one side of a trough. Means are provided to combine the streams of material exiting the passageways prior to the material entering the trough. A curved blade is positioned along the opposite side of the trough. As the trough fills, an overflow of material passes over the crest of the blade and moves along the blade's curvature so as to be uniformly deposited on a web of material moving in a direction normal to the length of the trough.

Abstract: The invention relates to an apparatus and process for simultaneously coating several layers to moving objects, particularly webs, whereby at least two liquid coating materials issue over the width of V-shaped sliding surfaces or above following sliding surfaces are delivered to the two sliding surfaces which are arranged in the form of a V and which form a discharge edge above the objects or web to be coated, flow down the underside of the V-shaped sliding surfaces, combine at the end of the sliding surfaces to form a multiple layer film of liquid which is deposited in the form of a free falling curtain onto the objects or the web of layer support material.

Abstract: An apparatus for applying hot thermoplastic stripe material to a solid surface. The apparatus comprises a pipe circuit including various means for storing and circulating stripe material, an applying device for said material, as well as an electronic control unit controlling the applying device. The applying device comprises a plurality of adjoining controllable gates. Each gate opening is of a width, i.e. the dimension perpendicular to the paper of FIG. 1, corresponding to a width module in the multi-stripe complex to be applied, whereas the height of the gate opening corresponds to the thickness of the applied material. The total width of the gates corresponds at least to the total width of the multi-stripe complex to be applied. Fluid-operated actuating means are present on the applying device, which serve to open and close the gates quickly. In this manner a possibility of a simultaneous applying of several marking stripes in a multi-stripe complex is obtained.

Abstract: A coating of liquid starch is applied to a travelling paper web by an application comprising an elongate hollow box structure having a horizontal slot outlet along one side. Starch solution is forced from the chamber horizontally through the slot outlet then flows downwardly under gravity across an upright wall surface to establish a falling curtain of the starch solution. The wall surface terminates at a bottom blade edge and the curtain falls away from the surface at the blade edge to drop onto the paper web.

Abstract: A coating of liquid starch is applied to a travelling paper web by an application comprising an elongate hollow box structure having a horizontal slot outlet along one side. Starch solution is forced from the chamber horizontally through the slot outlet then flows downwardly under gravity across an upright wall surface to establish a falling curtain of the starch solution. The wall surface terminates at a bottom blade edge and the curtain falls away from the surface at the blade edge to drop onto the paper web.

Abstract: A moving substrate material such as a web of paper, paperboard, film, or other substance is covered with a coating by propelling a coating material onto a deflector bar positioned near the substrate material. The deflector bar is configured to deflect the coating material toward the moving web in a continuous, free standing, smooth jet curtain of coating material. The coating on the web is free of skips, scratches, and other imperfections. In one embodiment, propulsion of the coating material toward the bar is accomplished by rotating a drum, or applicator roll, through the coating material. The surface of the drum or roll carries the material to the deflector bar at a speed and in a sufficient quantity to cause the material to be deflected by the bar in a continuous free standing curtain toward the paper web.

Abstract: A method and device for slide hopper multilayer coating, that aims to reduce or prevent the formation of beaded edges of the layers of coating composition as the layers slide down along the slide surfaces of the slide hopper coating head and as they are applied to a moving web material, wherein at least the upper one of the different layers formed by the slide hopper coater is coated at a width (l.sub.2) that exceeds the width (l.sub.1) of at least one other lower layer formed by the hopper.

Abstract: Apparatus for uniformly distributing liquid to a moving web or the like including a housing having side walls with elongated liquid exit slits formed therein. Curved deflector plates are positioned adjacent to the exit slits to direct fluid exiting therefrom toward the moving web. Baffles are provided within the housing defining openings through which the liquid must pass prior to exiting from the exit slits. The baffles are positioned in such a manner as to agitate the liquid prior to its reaching the exit slits.

Abstract: Elongated members to be plastic coated are cleaned, preheated to a temperature above the melting point of powdered plastic, and axially rotated while moved through a special coating chamber. Air locks located on opposed walls of the chamber freely receive the heated rotating member therethrough. An isolated, dry fluidized bed of plastic particles is formed below the airlocks and in underlying relationship to the moving member. A conduit has an inlet thereof located within the bed and an outlet thereof is directed downwardly towards the rotating member. An air lift moves the fluidized plastic from the bed, through the conduit, and into contact with the outer surface of the heated, rotating member, whereupon some of the powdered plastic fuses into a uniform coating which adheres to the outer surface of the member. A wet quench chamber is located immediately adjacent to the dry coating chamber.

Abstract: In making a protective glove, a lightweight fabric lining is mounted on a rotatable form beneath a distributor of fluid coating material. The form is rotated while the coating material is allowed to flow by gravity from the distributor onto the lining on the form. Initially the form is tilted so that the fingers are inclined upwardly and the coating material is flowed onto a zone embracing the junction of the fingers and thumb with the body of the glove. The form is then tilted so that the fingers are inclined downwardly and the distributor is traversed relatively to the form so as to coat successive zones of the lining until the entire lining is uniformly coated.

Abstract: A controller for maintaining a constant thickness of a layer applied to work pieces fed through a liquified curtain, the curtain itself being provided through a positive displacement pump which is driven by a motor having means for varying its speed from a remote locate. The work pieces are fed by an infeed conveyor, which is also driven by a motor of the variable speed type, and magnetic pickups or sensors are provided to produce two discrete trains of pulses indicative of the speed of the infeed conveyor, and of the positive displacement pump respectively. A digital readout ratio calculating unit is provided to produce a display indicative of the ratio of these pulse train frequencies, and the unit can be preset to provide an input to low and high limit preset counters.

Abstract: Method and apparatus for applying a plurality of superposed layers to a web by curtain coating in which only some of the plurality of layers are, and in the extreme case only one layer is, in contact with the curtain guides. The width of the remaining layers is smaller than the width determined by the curtain guides, and preferably smaller than the width of the web.

Abstract: Coating apparatus for producing multiple coatings on photographic bases wherein a layer of the coating material flows over each of two slideways which slope downwardly in a V form. An intermediate element is disposed in the flow gap bounded by the two slideways. The discharge edges of the slideways and of the intermediate element are disposed at substantially the same level. At this level the various layers of liquid combine to form a multilayer curtain which falls on to a base passing below to form a multiple layer thereon. The intermediate element can be a slot pourer so that the coating material issuing from its slot combines with the coating compositions supplied from the slideways.

Abstract: An apparatus for applying a liquid to a moving web in patterns comprises a means for forming a liquid shroud which falls on the web and at least one nozzle for blowing a fluid medium against the shroud to displace the falling shroud and cause nonuniform application of the liquid to the web.