US Patent 8028651 Dosing system for a coating plant

A metering system for a coating installation for coating components such as vehicle body parts contains an applicator which applies the coating material supplied to it with a volumetric flow metered on-demand, a regulated first metering device which adjusts the pressure or the volumetric flow of the coating material to be applied by the applicator based on setpoints which are specified by automated installation controls, a transducer to generate a reading which matches the pressure or the volumetric flow of the coating material flowing to the applicator and a control device for regulating the metering device as a function of the specified setpoints and of the reading from the transducer. A second metering device is connected at the outlet of the regulated first metering device for the coating material flowing to the applicator which controls the pressure or volumetric flow of the said applied coating material for precision metering of the coating material applied as a function of the specified setpoints.