An automatic, motor-driven, pneumatically controlled screen coating machine satisfying the industrial demand for process simplification, uniformity and reproducibility, is described. This coating machine consists of a stable, vibration-free base frame which stands on four adjusting screws, permitting accurate installation even on uneven floor surfaces. With this installation, surface coating to 10. 0 mm on the inside of the frame on each side is possible. All types of screen materials can be coated in this way.