Abstract: A slurry for electrostatic spray deposition and method for forming a coating film using the same are provided. The slurry comprises a solvent, a first polymer dissolved in the solvent, and polymer particles containing a second polymer and dispersed in the solvent.

Abstract: Various aspects of the present disclosure relate to a nozzle insert which may be used with a thermal spray gun apparatus. A nozzle insert according to the disclosure may include a body having an outer surface, the outer surface of the body being configured to circumferentially contact and transfer heat to an inner face of a thermal spray gun nozzle of a thermal spray gun. The body of the nozzle insert may be removed from the thermal spray gun nozzle without disassembling the thermal spray gun, and includes an axial passage configured to communicate a plasma discharge from the nozzle insert. A thermal spray gun apparatus and a thermal spray gun system including the nozzle insert are also disclosed.

Abstract: The invention relates to application of enamel layers in the form of powder in an electric field and subsequent firing. A cleaned surface of a steel product is covered with a ground coat enamel layer in the form of powder in the electric field by an application gun until the layer reaches a thickness of 100 to 150 ?m. Subsequently, the electric field is interrupted in order to reduce a space charge around the metal product and, in the same manner, a minimum of another two layers of cover coat enamel powder is applied until a thickness of the total enamel powder layer reaches a minimum of 750 ?m, wherein the electric field is interrupted each time between each steps of cover coat enamel powder application.

Abstract: A method for producing a pharmaceutical dose form includes depositing a measured quantity of a first coating material on an external surface of the dose form in a patterned configuration. A measured quantity of a second coating material is deposited on the surface of the dose form in a patterned configuration in relationship to the first coating material. The first and second coating materials form a coating layer in overlying relationship with at least a portion of the external surface of the dose form.

Abstract: The subject disclosure provides a method for applying dissimilar electrical charges to portions of a plurality of applicators by way of a conductor included in a conduit of each applicator. The method further includes causing each applicator to generate one or more jet sprays of a liquid received by each applicator for application of a material on a substrate, where one or more portions of the material on the substrate have one or more net charges associated with the dissimilar electrical charges applied to the portions of the plurality of applicators, where the conductor of each applicator is a sleeve positioned in the applicator, and where a diameter of the sleeve results in one of an outer surface of the sleeve contacting a surface of the conduit, or the outer surface of the sleeve having a separation from the surface of the conduit of the applicator. Additional embodiments are disclosed.

Abstract: The invention relates to an operating method for an atomiser (1) for the coating of structural components, particularly of vehicle body parts, with the following steps: Application of a spray jet of a coating agent through the atomiser (1); discharge of a first guide air flow (11) for the formation of a spray jet; determination of at least one application parameter (?, ?, T, BC/CC, Qvarnish, n, U,) which reproduces a property (?, ?, T, BC/CC) of the applied coating agent or an operating variable (Qvarnish, n, U) of the atomiser (1) as well as influencing of the first guide air flow (11) as a factor of the application parameter (?, ?, T, BC/CC, Qvarnish, n, U,). Within the framework of the invention, there is the alternative option that fluctuations of the application parameters and, based thereon, variations of the spray jet width are taken into account by means of an adaptation of the path spacing (d) between the adjacent coating agent paths for the purpose of keeping the path overlapping constant.

Abstract: An electrospraying apparatus and/or method is used to coat particles. For example, a flow including at least one liquid suspension may be provided through at least one opening at a spray dispenser end. The flow includes at least particles and a coating material. A spray of microdroplets suspending at least the particles is established forward of the spray dispenser end by creating a nonuniform electrical field between the spray dispenser end and an electrode electrically isolated therefrom. The particles are coated with at least a portion of the coating material as the microdroplet evaporates. For example, the suspension may include biological material particles.

Abstract: Electrospray methods and systems for coating of objects (e.g., medical devices such as a stent structure) with an open matrix coating. The open matrix coating is formed by electrospray using one or more nozzle structures each having at least an inner and outer opening. A first flow of a liquid spray composition is provided to the inner opening and a second flow of a liquid diluent composition is provided to the outer opening (e.g., the liquid diluent composition including at least one solvent, such as a composition having a dielectric constant equal to or greater than 10).

Abstract: A lubricant dispensing system is provided. The dispensing system includes a lubricant supply, a lubricant dispensing nozzle and a control panel. The dispensing nozzle includes a nozzle body with a fluid passageway therein which is in fluid communication with the lubricant supply, an electrode assembly for electrostatically charging lubricant in the fluid passageway and at least one discharge orifice through which electrostatically charged lubricant can be discharged. The discharge orifice is defined by at least one spray needle having a first end in fluid communication with the fluid passageway and a second end that extends outward of the nozzle body. The control panel directs the flow of lubricant from the lubricant supply to the lubricant dispensing nozzle and controls the electric power supplied to the electrode assembly.

Abstract: A microdeposition system microdeposits droplets of fluid material to define a feature pattern on a substrate. The feature pattern for the substrate is defined. A mask is created for the feature pattern that reduces a density of defects that occur due to a malfunctioning nozzle of the microdeposition head. The droplets of fluid material are microdeposited onto the substrate based on the mask to define sub-features of the feature pattern. One of the nozzles of the microdeposition head is assigned to each of the sub-features in the feature pattern. The nozzles may be assigned randomly or using other functions. The assigned nozzles in the mask are assigned to one of a plurality of passes of the microdeposition head.

Abstract: A microdeposition system microdeposit droplets of fluid material to define a feature pattern on a substrate. The feature pattern for the substrate is defined. A mask is created for the feature pattern that reduces a density of defects that occur due to a malfunctioning nozzle of the microdeposition head. The droplets of fluid material are microdeposited onto the substrate based on the mask to define subfeatures of the feature pattern. One of the nozzles of the microdeposition head is assigned to each of the sub-features in the feature pattern. The nozzles may be assigned randomly or using other functions. The assigned nozzles in the mask are assigned to one of a plurality of passes of the microdeposition head.

Abstract: Light reactive deposition uses an intense light beam to form particles that are directly coated onto a substrate surface. In preferred embodiments, a coating apparatus comprising a noncircular reactant inlet, optical elements forming a light path, a first substrate, and a motor connected to the apparatus. The reactant inlet defines a reactant stream path. The light path intersects the reactant stream path at a reaction zone with a product stream path continuing from the reaction zone. The substrate intersects the product stream path. Also, operation of the motor moves the first substrate relative to the product stream. Various broad methods are described for using light driven chemical reactions to produce efficiently highly uniform coatings.

Abstract: Spraying apparatus and methods that employ multiple nozzle structures for producing multiple sprays of particles, e.g., nanoparticles, for various applications, e.g., pharmaceuticals, are provided. For example, an electrospray dispensing device may include a plurality of nozzle structures, wherein each nozzle structure is separated from adjacent nozzle structures by an internozzle distance. Sprays of particles are established from the nozzle structures by creating a nonuniform electrical field between the nozzle structures and an electrode electrically isolated therefrom.

Abstract: The invention relates to an ultrasonic standing-wave atomizer arrangement for producing a paint spray mist for painting a workpiece, with a sonotrode, with a component arranged lying opposite the sonotrode, a standing ultrasonic field being formed in the intermediate space between the at least one sonotrode and the component in the case of operation. At least one nozzle-shaped paint feeding device is arranged perpendicularly in relation to the center axis of the sonotrode and introduces the paint into the intermediate space for the atomizing process at least one paint discharge point, the component arranged lying opposite the sonotrode being a coaxially aligned reflector, and the end face of the latter, facing the sonotrode, having a step-shaped recessed formation and the depth of said recessed formation corresponding to a multiple of half the wavelength ? of the sonic vibrations in air that are produced in the sonotrode.

Abstract: A method of electrostatically applying a powder material to a solid dosage form comprises the following steps: applying a bias voltage to generate an electric field between a source (1) of the powder material and the solid dosage form (5); applying an electrostatically charged powder material to the solid dosage form (5), the powder material being driven onto the solid dosage form (5) by the interaction of the electric field with the charged powder material, an the presence of the charged powder material on the solid dosage form serving to build up an electric charge on the solid dosage form (5) and thereby reduce the electric field generated by the bias voltage between the source (1) of powder material and the solid dosage form (5), and continuing the application of the electrostatically charged powder material to the solid dosage form (5) until the electric field between the source (1) of powder material and the solid dosage form is so small that the driving of the powder material by the electric field onto

Abstract: A continuous web having a first surface and a second surface is coated with a coating powder by allowing the web to move between a first and a second electrode, which are in different potentials and are located on the opposite sides of the web, applying the coating powder on the surface of the web by utilizing the difference in the electric potential, and finishing the coated surface of the web. Both surfaces of the web are coated essentially simultaneously by using oppositely charged electrodes.

Abstract: A powder coating control system comprising a plurality of gun controls associated with a like plurality of powder spray guns. Each of the gun controls stores a plurality of presets spray parameters. Each of the gun controls responds to part identification signals and part position signals to select in real time one of the stored presets of spray parameters and trigger its respective powder spray gun ON and OFF to apply a powder coating to the moving part in accordance with the selected set of spray parameters. The control system further permits a gun purge cycle to be programmed either before or after the powder coating process is executed. The control system automatically initializes and brings each of the gun controls to an operable state on-line with the system control.

Abstract: Spraying apparatus and methods that employ multiple nozzle structures for producing multiple sprays of particles, e.g., nanoparticles, for various applications, e.g., pharmaceuticals, are provided. For example, an electrospray dispensing device may include a plurality of nozzle structures, wherein each nozzle structure is separated from adjacent nozzle structures by an internozzle distance. Sprays of particles are established from the nozzle structures by creating a nonuniform electrical field between the nozzle structures and an electrode electrically isolated therefrom.

Abstract: An edible, hardenable coating composition containing microcrystalline cellulose and carrageenan and either a strengthening polymer, a plasticizer or both. The coating composition of the present invention may be applied to pharmaceutical and veterinary solid dosage forms, confectionery, seeds, animal feed, fertilizers, pesticide tablets, and foods and provides an elegant prompt release coating which does not retard the release of active ingredients from the coated substrate.

Abstract: A method of ensuring safety in operation of a coating apparatus includes the steps of measuring an instant value of a spray current, and regulating the spray current so that the spray current does not exceed a predetermined spray current limiting value by adjusting the high voltage applied to an electrode of the apparatus based on the measured instant value of the spray current. The spray current is directly measured in a return path of electrical current from the object to a regulating circuit of the apparatus.

Abstract: A liquid coating is formed by spraying drops of liquid onto a substrate or a transfer surface from an electrostatic spray head that produces a mist of drops and a wet coating in response to an electrostatic field. During spraying, the electrostatic field is repeatedly altered to change the pattern deposited by the drops. The wet coating can be contacted with two or more pick-and-place devices that improve the uniformity of the coating.

Abstract: Application device for a paper machine, a paper machine, a nozzle dampener, and a process for improving the surface of offset paper. The application device includes a plurality of nozzles distributed across a machine width as at least one row of nozzles, such that the plurality of nozzles are oriented to spray a passing paper web. The at least one row of nozzles is adapted for an alternative selective throughput of water and binding agent. The paper machine includes the application device. The nozzle dampener includes a plurality of nozzles distributed across a machine width as at least one row of nozzles, such that the plurality of nozzles are oriented to spray a passing paper web. The at least one row of nozzles are adapted to improve paper properties of offset paper by applying a binding agent onto the passing paper web.

Abstract: The present invention relates to a method as well as a device for deacidification treatment of inscribed or printed paper products (in the following called “books” for short), in which method the pages of the book to be treated are fanned open by means of an opening jet and, by means of an agent jet, the agent is injected between the fanned-open pages of the book; in this, for reducing the flow resistance prevailing between the individual pages 4 of the book 3, a suction takes place on the opposite side. In addition, provision is made for a slot-shaped, curved opening-jet nozzle 12 for generating a suitable opening jet 11.

Abstract: The invention relates to a method for directly or indirectly applying a liquid or pasty application medium (2) onto one or both sides of a continuous surface (4), wherein the application medium (2) is applied to the surface (4) in a plurality of single application regions by means of a plurality of single application nozzles (12) spaced apart from one another side by side and/or in succession in the direction of width (B) and/or longitudinal direction of the surface (4) and clearly distanced (D) from the surface (4), the application medium (2) emerging from each of these nozzles, wherein adjacent single application regions each intersect (U) at least in part in their respective edge regions, causing a layer of application medium to be produced across substantially the entire width (B) of the surface (4) to be coated. The invention also relates to an apparatus for performing this method.

Abstract: A process and station for changing product in an installation for spraying coating product, by bringing a first reservoir towards a suitable area of a cleaning/filling station, separating a sub-assembly composed of the first reservoir and a first spray associated therewith, with respect to the robot, connecting with the robot a second, similar sub-assembly composed of a second reservoir and a second spray, adapted to be used for spraying coating product during cleaning and/or filling of the first reservoir and the first spray, and proceeding with cleaning and/or filling of the first reservoir and the first spray in the area.

Abstract: A method of depositing a material onto a substrate, comprising the steps of: feeding a material solution to an outlet to provide a stream of droplets of the material solution; applying a potential difference between the outlet and a substrate to electrostatically attract the droplets from the outlet towards the substrate such that a corona discharge is formed around the outlet; heating the substrate to provide an increase in temperature between the outlet and the substrate; and progressively increasing the temperature of the substrate during material deposition.

Abstract: The invention relates to novel polymeric organosilicon compounds comprising hydrocarbon radicals with at least one aliphatic carbon-carbon double bond in a terminal position. To produce these compounds, (A) compounds containing at least one aliphatic carbon-carbon double bond per molecule, in a terminal position, are reacted with (B) oligomeric or polymeric organosilicon compounds containing units of the general formula R1R2SiO1/2 and units of the general formula HRSiO and/or HSiO3/2 and possibly units of the general formula R2SiO, where R is a monovalent, possibly substituted, hydrocarbon radical with between 1 and 18 carbon atoms per radical, which is free of aliphatic carbon-carbon double bonds, and R1 is a monovalent hydrocarbon radical with between 1 and 18 carbon atoms per radical which has at least one aliphatic carbon-carbon double bond in a terminal position, subject to the condition that the sum of the units HRSiO and R1R2SiO1/2 on average is greater than 2.

Abstract: A powder coating cabin includes a column-like housing defining an interior space between a ceiling and a bottom, with the bottom being substantially of flat configuration, and a coating unit arranged on the housing for spraying powder onto an object. The powder coating unit is further provided with a cleaning unit which is so received in the housing as to be movable between a stand-by position in which the cleaning unit is arranged at least partially underneath the bottom and an operative phase for automatically cleaning at least the inner wall surfaces of the housing, whereby the bottom is suitably so designed as to clear a passage for the cleaning unit.

Abstract: An apparatus and process for allowing a powder paint system to utilize reclaimed oversprayed powder paint of various colors by collecting it in a common reclaim collector system. The reclaimed powder paint is then applied to a work piece as a base coat to attain a portion of the total film build required. The remainder of the film thickness is then applied in subsequent application of virgin powder paint.

Abstract: An apparatus for applying powder coating material onto large objects such as automotive, truck or other vehicle bodies includes a powder spray booth defining a controlled area within which to apply powder coating material onto the vehicle bodies, a powder kitchen located at a remote position from the powder spray booth, and, a number of feed hoppers located proximate the booth which receive powder coating material from the powder kitchen and supply it to automatically or manually manipulated powder spray guns associated with the booth. Oversprayed powder coating material is removed from the booth interior by a powder collection and recovery system which transmits the oversprayed powder back to the powder kitchen for recirculation to the powder spray guns.

Abstract: The invention refers to a method of detecting workpieces in an electrostatic coating system, comprising at least one electrostatic coating device, which applies a high voltage to a high voltage electrode, in which the high voltage electrode generates a spray current including electrostatic charges for charging particles of a coating medium to be sprayed, an electrically conductive workpiece to be coated is moved past the coating device, the spray current of the high voltage electrode is determined and it is detected in accordance with the magnitude of the spray current whether the workpiece is in front of the coating device.

Abstract: The invention relates to a method for directly or indirectly applying a liquid or pasty application medium (2) onto one or both sides of a continuous surface (4), wherein the application medium (2) is applied to the surface (4) in a plurality of single application regions by means of a plurality of single application nozzles (12) spaced apart from one another side by side and/or in succession in the direction of width (B) and/or longitudinal direction of the surface (4) and clearly distanced (D) from the surface (4), the application medium (2) emerging from each of these nozzles, wherein adjacent single application regions each intersect (U) at least in part in their respective edge regions, causing a layer of application medium to be produced across substantially the entire width (B) of the surface (4) to be coated. The invention also relates to an apparatus for performing this method.

Abstract: The invention refers to a method of controlling a coating device, which discharges a coating medium such as a powder or wet lacquer to a workpiece, in which in accordance with the shape of the workpiece the shape of the cloud of the coating medium discharged is automatically adjusted by changing at least one of the velocity, and the quantity, and the mass flow of the coating medium discharged or shaping air. The invention further refers to a coating installation capable of operating by this method.

Abstract: This invention relates to a process and a device for producing an even and homogenous coating of liquids or powders on small free-falling objects that are not earthed. The process and the device according to the invention are primarily intended for surface coating of medicinal products and foodstuffs.

Abstract: A process for applying water-based paints and/or varnishes to the surface of a glass article which includes the steps of charging a composition of water-based product to a potential of a given polarity, spraying the composition of the water-based product and diffusing the resulting particles in a wide area so as to form a mist (120, 121), placing the glass article (200) in contact with an electrode at a potential of another given polarity and maintaining its surface temperature between 15.degree. C. and 30.degree. C., and bringing the glass article into the field of the mist making it possible to obtain various appearances of coloration in the glass article.

Abstract: Workpieces are electrostatically coated with powder materials. It is possible to attain a relatively large coating thickness in a single operation by simultaneously or alternately coating with powder particles that have a different electrical charge. The process can be used in applying single-component or multi-component coating materials.

Abstract: The invention concerns a method and a device for application of talcum powder of a super-absorbent powder (SAP) type or the like, the latter containing polyacrylate and/or a salt, such as a sodium salt, on a strip, such as a power cable. In accordance with the invention, the strip is made to travel through a treatment chamber in which debouch a number of powder supply lines distributed circumferentially with respect to said strip. The powder supply lines are incorporated in a friction charger formed with polarizing ducts through which the powder material is made to pass.

Abstract: An apparatus and method for spray painting of an article where the paint is heated to reduce the viscosity prior to being fed to a paint spray device such as an electrostatic paint spray device. A heat exchange unit is provided between each of a plurality paint supply sources and a paint spray device of a paint spray station, the heat exchange unit located closely adjacent to a respective paint spray device such that only paint being supplied to a paint spray device is heated by a respective heat exchange unit. The heat exchange unit preferably uses a hot dielectric oil for indirect heat exchange with the paint, and preferably a volume of heated paint between a heat exchange unit and a respective paint spray device is only about 15 percent or less of the volume of paint in the heat exchange unit, while the volume of heated paint is about one to three times the volume per minute of flow through the heat exchanger.

Abstract: A powder coating control system comprising a plurality of gun controls associated with a like plurality of powder spray guns. Each of the gun controls stores a plurality of presets spray parameters. Each of the gun controls responds to part identification signals and part position signals to select in real time one of the stored presets of spray parameters and trigger its respective powder spray gun ON and OFF to apply a powder coating to the moving part in accordance with the selected set of spray parameters. The control system further permits a gun purge cycle to be programmed either before or after the powder coating process is executed. The control system automatically initializes and brings each of the gun controls to an operable state on-line with the system control.

Abstract: A coating material dispensing and charging system comprises first electrical conductors extending between first electrically non-conductive supporting members, a power supply coupled across the first conductors and articles to be coated to maintain a high magnitude electrostatic potential difference across a space defined between the first conductors and the articles, a dispenser for dispensing the coating material into the space, and a supply of coating material for the dispenser. The first electrical conductors comprise electrically conductive filaments surrounded by electrically non-conductive sheaths.

Abstract: The present invention concerns a process as well as a device for deacidification of printed materials and paper products of all kinds, especially books. In order to avoid the so-called half-moon effect, i.e., an inadequate treatment caused by the narrow spaces between the individual book pages in the region of the book spine (7), with the invention the air jet, e.g., in the form of double jet consisting of an opening jet (10) and an active-substance jet (11), is so positioned relative to the book (1) that the active-substance jet and/or the opening jet enters essentially from one side (e.g., the bottom side) of the book (1) and exits at the opposite-lying side (e.g., the top side). Appropriately, the opening jet (10) as well as the active-substance jet (11) are inclined relative to the book spine (7). The active-substance jet (11) is moved relative to the book (1) by means of a swing arm (3).

Abstract: A method and apparatus (10) for powder coating three dimensional articles (12) carried on a conveyor (14) includes a controller (36) for controlling the rate at which coating material is discharged from a gun (16), so that the rate is proportional to the surface area of the surface portions of the article (12) as they pass the gun (16). Some surface portions topographically have a greater surface area which must be covered, while others are flat or have cut-out regions, requiring less coverage or no coverage at all. In powder coating operations, the discharge rate is controlled via automatic or programmed control of an electro-pneumatic air regulator (42) which regulates the supply of pressurized air to a powder pump (24) connected to the spray gun (16). The apparatus (10) assures uniformity in coating for a three dimensional article (12) with multiple surface portions of varying topography such as curves, angles, cut outs, etc., while minimizing the amount of wasted coating material.

Abstract: A method of applying a film of coating material to a web of pulp product on a machine and an apparatus for carrying out the method. The coating material is directed in a fluid against the surface of a web of pulp product in the form of a high volume low velocity atomized spray mist from high volume low pressure spray nozzles with an exiting air pressure from the spray nozzle of 1 to 10 psig, preferably 3 to 6 psig.

Abstract: A method and apparatus for electrostatically coating a non-conductive article. The article is passed through multiple stations where electrostatically charged liquid coatings are applied to the article. Adjacent stations have opposite polarity and neutralize the residual electric charge buildup from the preceding station.

Abstract: A continuous, automated method and apparatus for transporting and electrostatically powder coating articles such as fasteners. Articles in an unoriented state are oriented one behind another, transferred in succession to and magnetically retained on a face of a rotating feed wheel at a first position with respect to the feed wheel, transported to a second position by rotation of the feed wheel, transferred in succession at the second position to a respective portion of a moving conveyor, and releasably suspended magnetically and electrically grounded at the respective portion of the conveyor. Magnets used to suspend the articles from the conveyor are shielded from direct contact with the articles to avoid coating the magnets. While the articles remain suspended magnetically from the conveyor by their end portions, they are conveyed through a coating booth where they are electrostatically powder coated.

Abstract: A method of applying a metallic paint to an object conveyed by means of a conveyor, by reciprocating one or more rotary atomizing electrostatic painting machines at right angles to the direction in which the object is conveyed. The speed of the reciprocation of the painting machines is controlled according to the speed of the conveyor so that the pitch between the adjacent orbits of the strokes of the reciprocation of the machines drawn on the object may become a predetermined value.

Abstract: A coating is applied to a substrate by conveying the substrate past a number of liquid spraying nozzles (32) to which high voltage is applied to produce spray in the form of liquid ligaments which deposit as such, or in the form of droplets, on the substrate to form generally parallel tracks which merge with each other to produce a substantially uniform thickness coating. The nozzles (32) are operable in two modes: a normal spraying mode and a deflect mode in which the ligaments are deflected away from the substrate and towards a collector electrode (34). Operation of the nozzles (32) may be co-ordinated so that different formulations are deposited as separate panels in succession lengthwise of the substrate. The coating system is particularly suitable for coating multicoloured dyesheets for use in thermal transfer printing.

Abstract: A method and an apparatus for electrostatic coating of workpieces with powdered material includes a plurality of successively arranged spray guns which are passed by the workpieces. At least the spray gun which is passed first by the workpieces is charged with recycled powder while at least the spray gun which is passed last by the workpieces is charged with fresh powder in form of a powder-air mixture containing a low amount of air and supplied at low velocity.