Code imprinting system having error preclusion function

A system for imprinting identification code on individuals of automobiles of various types or models being assembled on one assembly line in an order specified in a production program, the system comprising:

• a control unit to produce an electrical data signal representing an identification code specified in the production program;
• a control unit to produce an electrical control signal representing the identification code based on said data signal;
• an automated stamping machine having a type-setting mechanism which sets up imprinting types into an arrangement corresponding to the identification code in response to said control signal supplied from said control unit and a driving mechanism to carry out a stamping action in response to an electrical operation signal;
• a sensor for detecting actual arrangement of said imprinting types and producing an electrical signal representing the detected type arrangement;
• a first comparator which compares the type arrangement signal supplied from said sensor with said data signal supplied from said instruction unit and produces a first correctness signal only when the compared signals agree with each other but produces a warning signal if the compared signals do not agree with each other;
• a sensor for detecting the type or model of a car body on which the identification code is to be imprinted and producing an electrical car model signal representing the detecting car model;
• a second comparator which compares said car model signal with a car model component of said data signal supplied from said instruction unit and produces a second correctness signal only when the compared signals agree with each other but produces a warning signal if the compared signals do not agree with each other;
• and
• a judgement unit which provides said operation signal to said stamping machine only when both said first and second correctness signals are supplied thereto at a predetermined moment.