Patent ID: 8794178

Claim:
A system for coating a substrate with liquid coating medium for the production of an exhaust gas purification catalyst, the substrate being a support body having two end faces and an axial length L, and being traversed from a first end face to a second end face by a multiplicity of channels, the system comprising: a chamber filled with a liquid and having a piston, wherein the liquid-filled chamber communicates with a tank, in the interior of which a displacement body is arranged in such a way that, when the piston is moved, the displacement body is moved proportionally by the liquid, and the tank communicates with a coating device for the substrate in such a way that, when the displacement body is moved proportionally by the liquid, the displacement body acts on a liquid coating medium in the tank to effect a proportional change in the level of the liquid coating medium in the coating device, wherein the coating device is configured to join with the substrate in such a way that the coating device is configured to deliver the liquid coating medium to multiple channels of the joined substrate simultaneously.