TEMA PI-SHEETS

TEMA PI-SHEETS, Mühlbauer’s print inspection solution for sheets, is integrated into the printing line. A sensor detects the front edge of each sheet when passing on the conveyor. The color line-scan camera/s make/s a full scan of the decoration. Exact information about the sheet position is provided to the system by a rotary encoder. The LED lighting system is best adaptable to the individual characteristics of both substrate and decoration. The print quality is determined by comparing the print image against a stored reference. Quality assessment is immediately available. The main defects to be detected are color variations, out of register/offset, distorted print, stains, blobs, smear, voids, missing print, inhomogeneous substrate, and scratches or blisters as far as visible in the camera image. Detected defects are indicated on the monitor. The defect signal can be used for triggering a warning signal, a marking unit, a reject unit, or even a machine stop if necessary.