Abstract: A method for positioning a number of working implements, for example spray nozzles, to certain working or treatment points on a car body as the latter is supported by an overhead conveyor for travel between different working and assembly stations on a production line. A vertically movable base structure is provided and a working implement carrying frame is movably supported on the base structure. Hydraulic jacks on the base structure are arranged to accomplish a vertical parallel movement of the frame up toward the underside of the car body until one of four contact sensors indicates contact with the latter. A final vertical adjustment of the frame is accomplished by four vertical cylinders which raise the frame in a non-parallel movement until at least three of the four contact sensors indicate contact with the car body. The docking of the frame to the car body is completed by activating two expandable dowels which are introduced into openings in the car body bottom shell.

Abstract: A device for positioning a number of working implements, for example spray nozzles, to certain working or treatment point on a car body as the latter is supported by an overhead conveyor for travel between different working and assembly stations on a production line. The device comprises a vertically movable base structure and a working implement carrying frame movably supported on the base structure. Hydraulic jacks on the base structure are arranged to accomplish a vertical parallel movement of the frame up towad the underside of the car body until one of four contact sensors indicate contact with the later. A final vertical adjustment of the frame is accomplished by four vertical cylinders which raise the frame in a non-parallel movement until at least three of the four contact sensors indicate contact with the car body. The docking of the frame to the car body is completed by activating two expandable dowels which are introduced into openings in the car body bottom shell.

Abstract: An electrostatic spray gun for liquid paint has a nozzle that comprises an inner body formed of a sintered material that consists of an electrically non-conductive matrix, e.g. polytetrafluoroethylene, with conductive particles, e.g. bronze powder, dispersed in the matrix, and an outer body of electrically insulating plastic material. The rear end of the inner body is connected to high voltage, and it has an annular front surface around a paint discharge orifice. This surface shows a lot of such bronze particles that form point electrodes for producing air ions. Two additional needle electrodes are clamped between the two bodies. The paint is dispersed by air jets and the air ions attach to the paint particles.