Patent ID: 8801820

Claim:
A filter device for a painting booth comprising: a device casing configured to be in communication with the painting booth; a filter housed in the device casing; an intake opening provided in the device casing for taking in an exhaust gas from the painting booth containing a viscous matter to be captured; and a precoat agent nozzle provided in the intake opening for ejecting a powder precoat agent for the filter along with carrier gas toward the exhaust gas that flows into the device casing from the intake opening, wherein the intake opening is a slit or rectangular opening extending in a width direction and provided in a side face portion of the device casing, an accumulation recess provided in an upper edge portion of the intake opening and continuously formed in a longitudinal direction of the intake opening, the accumulation recess having a profile that opens downward as viewed from the longitudinal direction of the intake opening; and wherein the precoat agent nozzle is arranged in a predetermined position of the intake opening in the longitudinal direction thereof for ejecting the precoat agent and carrier gas toward an inner depth surface of the accumulation recess.