Abstract: A paper coater includes a frame, an entry guide roll and an exit guide roll both carried by the frame and along a path of travel of a continuous paper sheet. The paper coater includes independently controllable hot wax applicators carried by the frame between the entry and exit guide rolls. Each independently controllable hot wax applicator includes a press roll, an engraved applicator roll opposite the press roll so that the continuous paper sheet is therebetween, and with the engraved applicator roll extending into a hot wax reservoir to pick up hot wax. Each wax applicator includes a doctor blade adjacent the engraved applicator roll to control a thickness of hot wax. At least one selectively operable positioner relatively moves the press and engraved applicator rolls between active and idle positions. The paper coater provides different wax application rates and can be reconfigured relatively quickly between different application rates.

Abstract: The present invention provides a bar coating method comprising the step of: weighing and applying a coating liquid by the bar with bringing the bar into contact with a continuously running web and supplying the coating liquid to an feed side of the web with respect to the bar to form a coating liquid puddle, wherein a plurality of coating liquids are supplied to the feed side of the web with respect to the bar via a plurality of slits formed in a multistage form in an feed direction of the web in order to apply the coating liquid having a high viscosity or low wettability without problems.

Abstract: A coating liquid application apparatus is provided which can apply a coating liquid, such as a coating agent for improving a weatherability of a printed surface, to the printed surface of a print medium automatically and at high speed. For this purpose, this invention uses application mechanisms to apply the coating liquid to the print medium that was ink-printed with an image. Each application mechanism has a pair of rollers supplied with the coating liquid. Multiple stages of such application mechanisms are provided. The print medium is passed between the paired rollers successively from one application mechanism to another to apply the coating liquid to the print medium in a plurality of stages.

Abstract: A torch for thermal spraying stored rotatably in the front portion of a nozzle and having a discharge member with a droplet passage at the center, wherein a projection is formed at the tip of the discharge member, an air jet space allowing rotating air to be blown therein is formed at the rear of the discharge member projectedly from the discharge member by integrally forming with each other a plurality of arms disposed in an air jet cylinder, and a rotating force is given to the discharge member by the air blown from an air jet port disposed on the outside of the air jet space, so as to bring the rotational speed of the discharge member into the range of 800 to 6000 rpm, whereby thermal spraying can be performed on the internal surfaces of pipes and cylinders, and the thickness of a thermal spraying film can be optimized.

Abstract: A printing device includes an adhesive applicator for the application of a strip of adhesive to one or both sides of pages of paper adjacent an edge to be bound. A pinch roller drives the page past a print head which prints text and/or images onto the page. The adhesive applicator is situated adjacent the print head and applies the adhesive strip(s) to the pages as they move past the print head.

Abstract: The invention is also a method of making adhesive tape. The coating step includes drop die coating the plurality of adhesive stripes on the backing without causing any “necking-down” problems of the adhesive stripes. The invention is also a drop die for stripe coating a substrate. A face plate is removably and replaceably mounted across the fronts of die blocks. The face plate has a plurality of orifices such that fluid flowing in the die through the first slot exits through the orifices in the face plate in a plurality of stripes.

Abstract: A coating device and a coating method capable of performing stable coating without causing defects such as a discontinuous coating film even if a web is run at a high speed. The coating device includes: a bar which is in contact with the web and can rotate about an axis; a liquid supply passage which is arranged adjacent to the bar at an upstream side from the bar and supplies a coating liquid to be applied to the web between the web and the bar to form a coating liquid reservoir when the web is being run; and an air-intrusion preventing unit which is arranged at an upstream side from the coating liquid reservoir and produces a liquid flow along a web surface to prevent an accompanying air film produced on the web surface from intruding into the coating reservoir when the web is being run.

Abstract: A process for producing high quality reverse osmosis, nanofiltration, and ultrafiltration membranes in a high speed process provides membranes which have excellent rejection characteristics coupled with high flux capabilities. The process employs tandem coating techniques to coat a microporous substrate with a thin membrane on the order of 25 .ANG. to 1.0 microns. The tandem coating process comprises tandem offset gravure and subsequent slot die coating applicators, or alternatively comprises tandem slot die coating applicators. For reverse osmosis and nanfiltration membranes, a wet-on-wet coating process is used to coat a porous substrate first with an aqueous solution, and then with an organic solution to produce a cross-linked, interfacially polymerized composite membrane. Single slot coating applicators are utilized to produce ultrafiltration membranes.

Abstract: A coating apparatus for a traveling web comprising two coating heads and a traveling path changing roller is disclosed. A bar coater is arranged close to a pass roller. The bar coater is fixed at such a position as to contact the web when the pass roller is moved down. An extrusion coater is arranged below a backup roller in such a manner as to move up and down. If the pass roller moves up and bends up the traveling path of the web, the web separates from the bar coater. Then, if the extrusion coater moves up, the web is coated with the coating solution by the extrusion coater. If the pass roller and the extrusion coater move down, the web is coated with the coating solution by the bar coater.

Abstract: The invention concerns a method for two-sided coating of a printing-paper web with a coating paste or equivalent. In the method, the paper web is passed through the coating part of the paper machine, in which the first side of the web is coated in the first coating station of said coating part, and the coating-agent layer produced on the face of the web is dried at least partly by means of a first drying unit. The second side of the web is coated in the second coating station of the coating part, and the second coating-agent layer produced on the face of the web is dried at least partly by means of a second drying unit.

Abstract: The present invention relates to a device for coating traveling webs of paper or board having two web guide rolls closely adjacent each other. Each roll has an applicator associated on its periphery. The applicators cooperate with each other at least in part for the coating of the web directly one after the other, preferably within at most 0.15 seconds. The rolls are arranged one above the other--possibly somewhat laterally shifted from each other. The lower roll has an applicator chamber of a nozzle applicator in the region of its periphery remote from the upper roll. The upper roll has at least one of the following on its web-entrance side--with respect to the lower roll--a sump chamber for coating composition formed of a doctor element and its mount and on its other side, an applicator chamber of a nozzle applicator. The lower roll may be adapted to be swung or lowered away from the upper roll and/or the upper roll may be liftable away from the lower roll.

Abstract: A coating section for coating a traveling web of material, such as paper, wherein the web to be coated travels along a selected one of two different web paths. There is a lower counter roll and an upper press roll which define a nip between them and the distance apart of the two rolls is adjustable. A respective applicator for coating composition is on each of the first and second sides of the lower roll and on the third side of the upper roll, and the third side is the same side of the coating section as the first side of the lower roll. First web guide rollers guide the web from below, past the counter roll and the first applicator and not through the nip. Second guide rollers guide the web through the nip.

Abstract: In a screen printing apparatus an applicator body is rotatable about its axis to selectively bring one of a plurality of medium supply ducts into active position so that it can deliver the color medium to the substrate. The applicator roller or blade and a strip defining the applicator compartment are provided on the rotatable body for each set of orifices and each distribution duct so that these elements need not be cleaned for color changeover since they remain associated with the color when the applicator is rotated.

Abstract: A process for controlling curl in coated papers in which the paper web is coated on one side and is wetted with water on the opposite side by a roll-type water applying apparatus, the water applying operation being carried out under such conditions that the relative difference of the surface speed of the applicator roll from the running speed of the paper web is at least 1000 m/min. and preferably the water applicator roll is reversely turning. Curling of the paper is thereby eliminated.

Abstract: Solvent which is contained in coating material to be applied to a running web is recovered in a chamber which is sealed from the atmosphere and wherein the solvent-containing coating material is first applied to one or more endless belt conveyors which transport the respective layers to discrete transfer stations for application to the running web. Streams of an inert gaseous fluid are circulated through the chamber to withdraw the solvent and to convey it into a condenser wherein the solvent is recovered from the gaseous fluid. The inert gaseous fluid is heated to promote the expulsion of solvent from the coating material on the conveyor or conveyors. The web can be provided with a base coat upstream of the first transfer station so that the layers of coating material are applied over the base coat. The latter is dried upstream of the transfer stations.

Abstract: Apparatus for applying film coatings of material to electrical component bodies having axial leads includes adhesive tape for supporting the components in spaced relationship. A supply reel carries a supported plurality of such components. A shaft has a circumferential row of transversely oriented pockets for receiving component bodies whereby their leads are parallel. The shaft is oriented with respect to a lower reservoir providing liquid polyurethane, so that, as it rotates, sequential pockets pass through the liquid material, retaining menisci thereof therewithin. As the component bodies are received by the menisci retained pockets, underside portions of the components are coated with liquid material. A brush applies liquid material from a upper reservoir to upper portions of the carried bodies. The brush smooths the upper portions to avoid formation of globs or blobs thereon.