SERIAL NUMBER PRINTING MACHINES

摘要

Machine having means for printing serial numbers and means for printing check digits. The check digit printer is controlled by means including counting means having one counting unit for each digit of the serial number to be printed, the advancement of a counting unit transmitting pulses to operate the check digit printer. The means for controlling the check digit printer may be electromechanical or electronic. The counting units may be cold-cathode gas filled decade counters.