Abstract: The invention relates to an apparatus for the coating of a substrate, in particular of a circuit board, with a material application device for applying a coating material and with a gas supplying device for the supply of a gaseous medium, the material application device having an inner tubular element, the gas supply device having an outer tubular element which is arranged coaxially to the inner tubular element and surrounds the latter, so as to form between the outer and the inner tubular element a gas supply duct which has an annular orifice at one end, the supply duct being configured so that the gaseous medium flows out, parallel to the coating material, through the annular orifice, in order, when it impinges on the substrate, to displace the applied coating material and thereby distribute it over the area. The apparatus is distinguished in that the material application device has a jet valve which, in a first operating mode, carries out a jetted supply of material into the inner tubular element.

Abstract: The invention relates to an apparatus for coating a substrate (60), in particular a printed circuit board (61), with a device (16) for applying a coating material (material applying device) and a device (14) for supplying a gaseous medium (gas supplying device), the material applying device having an inner tubular element (16). The apparatus is distinguished by the fact that the gas supplying device has an outer tubular element (14) which is arranged coaxially in relation to the inner tubular element (16) and encloses the latter, so that a gas supply channel (19) is formed between the outer tubular element (14) and the inner tubular element (16), the supply channel (19) being designed in such a way that the gaseous medium flows out parallel to the coating material, in order to displace the coating material when it impinges on the substrate (60) and in this way distribute it over the surface area. Furthermore, the invention relates to a method for coating a substrate.

Abstract: The invention relates to an apparatus for the coating of a substrate, in particular of a circuit board, with a material application device for applying a coating material and with a gas supplying device for the supply of a gaseous medium, the material application device having an inner tubular element, the gas supply device having an outer tubular element which is arranged coaxially to the inner tubular element and surrounds the latter, so as to form between the outer and the inner tubular element a gas supply duct which has an annular orifice at one end, the supply duct being configured so that the gaseous medium flows out, parallel to the coating material, through the annular orifice, in order, when it impinges on the substrate, to displace the applied coating material and thereby distribute it over the area. The apparatus is distinguished in that the material application device has a jet valve which, in a first operating mode, carries out a jetted supply of material into the inner tubular element.

Abstract: The present invention concerns a coating medium with at least one meltable polymer. According to the invention provision is made that it contains 1 to 99 percent by weight of at least one amorphous poly-?-olefin and 99 to 1 percent by weight of at least one silane functional moisture-linking polymer.

Abstract: The invention relates to an apparatus for coating a substrate (60), in particular a printed circuit board (61), with a device (16) for applying a coating material (material applying device) and a device (14) for supplying a gaseous medium (gas supplying device), the material applying device having an inner tubular element (16). The apparatus is distinguished by the fact that the gas supplying device has an outer tubular element (14) which is arranged coaxially in relation to the inner tubular element (16) and encloses the latter, so that a gas supply channel (19) is formed between the outer tubular element (14) and the inner tubular element (16), the supply channel (19) being designed in such a way that the gaseous medium flows out parallel to the coating material, in order to displace the coating material when it impinges on the substrate (60) and in this way distribute it over the surface area. Furthermore, the invention relates to a method for coating a substrate.

Abstract: In a process for partial coating of printed circuit boards (11) with an initially liquid coating material, a coating tool (12) is used that can be flooded with the coating material, which has the basic shape of a basin with coplanar free frontal surfaces (16/1 N) which has basin internal space bordering casing walls (14/1 N), against which the printed circuit boards can be pressed liquid-tight with their side to be coated facing the internal space.

Abstract: The invention relates to an apparatus for coating a substrate (60), in particular a printed circuit board (61), with a device (16) for applying a coating material (material applying device) and a device (14) for supplying a gaseous medium (gas supplying device), the material applying device having an inner tubular element (16). The apparatus is distinguished by the fact that the gas supplying device has an outer tubular element (14) which is arranged coaxially in relation to the inner tubular element (16) and encloses the latter, so that a gas supply channel (19) is formed between the outer tubular element (14) and the inner tubular element (16), the supply channel (19) being designed in such a way that the gaseous medium flows out parallel to the coating material, in order to displace the coating material when it impinges on the substrate (60) and in this way distribute it over the surface area. Furthermore, the invention relates to a method for coating a substrate.

Abstract: A protective film of plastic is applied to a printed-circuit board fitted with electronic components on at least one side. In order to keep some areas free of plastic film, a vat has an exposed rim which corresponds in shape to the outline of the surface(s) to be coated and lies in a single plane. The circuit board is placed, with the side to be partly coated facing inward, against the coplanar rim of the vat and is pressed against the rim defining the shape of the surface(s) to be coated. The vat is subsequently pivoted, together with the circuit board on it, into a position in which the circuit board forms the floor of the vat and liquid coating material contained in the vat spreads over the surface(s) to be coated, wetting them. The vat is then pivoted into a position in which excess coating material can drain off the circuit board.

Abstract: An extruded, hollow profile of light-transmissive thermoplastic material, especially polyvinylchloride or a polyacrylate, is coated on at least one major side with a film of compatible, cold-hardening, light-stabilized transparent liquid resin, such as a polyester or an acrylic, whose surface is being deformed by contact with an embossed pattern carrier. The film may be stained and/or reinforced by an embedded glass-fiber insert.