Abstract: A roof machine for the electrostatic paint coating of the front end, roof, and rear surfaces of an automobile chassis, transported on a conveyor belt includes a roof beam equipped with atomizers, the roof beam extending over the conveyor belt. Opposite ends of the roof beam are positioned in two vertical columns, one column containing the drive elements for the roof beam and the atomizers, and the other column containing the paint supply for the atomizers. The roof beam is positioned in the vertical columns that the roof beam can be moved up and down and can be rotated around its longitudinal axis as well, and the atomizers can be moved jointly back and forth and tilted and individually adjusted with respect to their lateral spacing relative to one another. The housing jacket of the roof beam is cylindrical.

Abstract: Particles of conductive coating material, such as the water-enamel type paint, are sprayed from a grounded bell-atomizer (2) and are electrostatically charged in the corona-discharge area by outer electrodes (10) which are inserted into a holding-arrangement (11, 12, 15) made of an insulating material. Potential-control means in the form of suitably selected materials for the holding-arrangement (11, 12, 15) and/or an atomizer-housing (4) are provided. The radial-potential pattern between the atomizer-housing (4, 6) and the outer electrodes (10) is approximated to the radial-potential distribution of the material sprayed. The insulating material of at least a portion of the apparatus consists of a fluorocarbon such as PTFE (polytetrafluorethylene). The subject invention reduces the danger of the apparatus coating itself.

Abstract: Particles of conductive coating material, such as the water-enamel type paint, are sprayed from a grounded bell-atomizer (2) and are electrostatically charged in the corona-discharge area by outer electrodes (10) which are inserted into a holding-arrangement (11, 12, 15) made of an insulating material. Potential-controls in the form of suitably selected materials for the holding-arrangement (11, 12, 15) and/or an atomizer-housing (4) are provided. The radial-potential pattern between the atomizer-housing (4, 6) and the outer electrodes (10) is approximated to the radial-potential distribution of the material sprayed. The insulating material of at least a portion of the apparatus consists of a fluorocarbon such as PTFE (polytetrafluorethylene). The subject invention reduces the danger of the apparatus coating itself.

Abstract: In an apparatus for electrostatically coating workpieces with an electrically conductive coating material, an intermediate isolation tank (V) is conencted by electrically insulating conduit lines (LVA, LVB, LZA, LZB) between an electrically grounded coating material supply and a high voltage spraying device atomizer (Z). When the apparatus is in operation, the conduit lines (LVA, LVB, LZA, LZB) are alternately filled and emptied, such that the grounded supply and the high voltage atomizer (Z) are continuously insulated from each other. One embodiment utilizes an isolation tank V' which includes a metering cylinder (DZ) having a displaceable piston (2) for adjusting the coating material capacity of the tank (V') to the amount required to coat a single workpiece.

Abstract: In an apparatus for the use of so-called water enamels or some other similarly conductive coating material, the electrical field for charging the sprayed particles is produced between the grounded spraying edge (6) of a bell-shaped atomizer (10) and a large number of external electrodes (10) inserted into an annular element (20) made of an insulating material.

Abstract: In an apparatus for the use of so-called water enamels or some other similarly conductive coating material, the electrical field for charging the sprayed particles is produced between the grounded spraying edge (6) of a bell-shaped atomizer (10) and a large number of external electrodes (10) inserted into an annular element (20) made of an insulating material.

Abstract: An electrostatic spray coating assembly (10) for atomizing electrically conductive material comprises a rotary atomizer spray head (12) having an annular atomizing spraying edge (14). An external housing (22) supports the spray head (12) and a feed line (18) supplies the material from a supply system to the spraying edge (14) of the spray head (12). The feed line (18) and the material supplied thereby and the spray head (12) are electrically grounded. Three needle-shaped charging electrodes (36) are in spaced relationship circumferentially at uniform angular intervals with respect to the spray head (12). The charging electrodes (36) are connected to a source of high voltage potential for producing an electrical field charging the conductive material. The charging electrodes (36) are positioned from the spraying edge (14) of the spray head (12) a predetermined radial distance (R) at least twice the diameter (d) of the spraying edge (14) of the spray head (12).

Abstract: The invention relates to a nozzle for a paint spraying device having a radially inward valve needle that is connected in a coaxial arrangement with the nozzle. A radially outward paint supply pipe is connected to the valve at one end and a paint source at the other. The valve needle is hollow for paint supply purposes and has a forwardly inclined bore in its tip which opens axially in front of the valve into an annular chamber created between the valve needle and the supply pipe.

Abstract: An apparatus for painting parts of large surface area, the apparatus having a spray gun movable to and fro, and also rotatable, relative to a part to be painted. The gun is carried by a swivel member rotatably mounted by a cantilever arm which is mounted for rocking motions about first and second axes, one at right angles to the other, and the swivel member and gun being rotatable about a swivel axis which is at right angles to both these first and second axes. The swivel member is an elongated rod parallel to the cantilever arm, the arm being mounted on a rockable shaft, the axis of which is said first axis, the spray gun being mounted on the free end of the swivel rod.

Abstract: A round or annular jet nozzle for the production and discharge of a mist or aerosol for coating objects, including a nozzle cap forming the axial front end of the nozzle, a nozzle body mounting the cap, which nozzle body has two channels for feeding of flowable coating material such as lacquer or paint powder, and respectively, for feeding of an atomization gas standing under pressure such as pressurized air, the two channels extending at least partly parallel to the nozzle axis, an annular-shaped atomization chamber into which the two feed channels exit approximately parallel, and with a conical annular gap for the exit of the mist and aerosol, respectively, the annular gap diverging forwardly with respect to the nozzle axis, the annular gap standing in connection with the atomization chamber.

Abstract: A spray nozzle construction which includes a nozzle holder, a nozzle sleeve enclosing the nozzle holder, a nozzle cap arranged at a front end of the nozzle holder, and an annular channel, formed by the nozzle sleeve and nozzle cap, extending outwardly in a radial and axial direction. The nozzle cap is freely rotatable about the axis of the nozzle construction with a pneumatic drive being provided for rotatably driving the nozzle cap.

Abstract: An arrangement and process for mixing components of a flowable material such as pulverous compounds of a mixed paint or of a basic lacquer and hardener of a hardenable synthetic resin and for coating of a surface of an object. A separate dispersing chamber is provided for one of the components of the flowable material with the dispersing chamber communicating with a mixing chamber for mixing the component from the dispersing chamber with at least one other component of the flowable material. The material is discharged from the mixing chamber in the form of a mist or aerosol by way of a propellant fluid. The dispersion chamber and the mixing chamber are spaced from one another and are defined between a number of elements arranged so as to form a spraying and/or dispersing nozzle.