Cyclic sheet feed, at a printing press, has at least one sensor to register the movement of successive sheets as position signals for comparison with nominal position values to set the blower tube action

摘要

The system to give a cyclic sheet feed to a printing press has at least one sensor (18) to register the passage of sheets (1), in succession, with measured position values. The values are taken at the control (17) as a characteristic value for the sheet position as an actual value for comparison with a nominal value. The pneumatic blower tube (10) for the next sheet is set according to the comparison. The sensor can be ultrasonic or optical, calibrated at the surface of the sheet grip system (7).