Patent ID: 6849129

Claim:
A paint-spraying apparatus for the application of liquid coating material to workpieces and comprising an automatically actuatable color changer ( 1 ), an atomizer ( 8 ) which can be connected to high voltage, a supply line ( 7 ) of electrically insulating material extending between said color changer ( 1 ) and said atomizer ( 8 ), through which supply line ( 7 ) a slug ( 11 ) can be moved back and forth, and having a voltage divider ( 16 ) connected to said supply line ( 7 ) to effect electrostatic insulation of said color changer ( 1 ) from the atomizer ( 8 ) and from at least one storage vessel ( 19 , 20 ) provided for storage of the coating material and attached to said supply line ( 7 ), characterized in that said supply pipe ( 7 ) has an insulating section ( 25 ) delimited by cut-off valves ( 26 , 27 ) and having a length sufficient to prevent sparkover, which section ( 25 ) of the supply pipe ( 7 ) can, when said cut-off valves ( 26 , 27 ) are closed, be emptied and flushed free of residues of coating material by means of a device ( 28 - 32 ), said voltage divider ( 16 ) is connected to the supply line parallel to the insulating section ( 25 ), and the coating material present in said paint delivery pipe ( 7 ) outside said insulating section ( 25 ) can be forced back into said color changer ( 1 ) by said slug ( 11 ), to which end said slug can pass through the two cut-off valves ( 26 , 27 ) delimiting said insulating section ( 25 ), when said valves ( 26 , 27 ) are open.