High speed printing apparatus

Claim 1

A HIGH SPEED ELECTRONIC PRINTING SYSTEM COMPRISING A READ-OUT DEVICE INCLUDING A CATHODE-RAY TUBE FOR DISPLAYING LIGHT IMAGES ON A SCREEN AND PROVIDED WITH DEFLECTION MEANS TO VARY THE VERTICAL ORIENTATION OF SAID BEAM ON SAID SCREEN FROM A NORMAL LOCATION THEREON TO A DISPLACED LOCATION; A RECORDER INCLUDING A MOVABLE WEB DISPOSED TO RECEIVE THE LIGHT IMAGES FROM SAID SCREEN AND A MOTOR THEREFOR; AND APPARATUS TO COORDINATE THE OPERATION OF SAID DEVICE AND SAID RECORDER INCLUDING A REVERSIBLE BINARY COUNTER, MEANS COUPLED TO SAID COUNTER TO DERIVE AN ANALOG VOLTAGE THEREFROM AS A FUNCTION OF THE COUNT HELD THEREIN, MEANS ACTUATED BY AN ADVANCE SIGNAL AND COUPLED TO SAID DEFLECTION MEANS AND TO SAID MOTOR TO DEFLECT SAID BEAM IN ACCORDANCE WITH SAID ANALOG VOLTAGE TO SAID DISPLACED LOCATION AND SIMULTANEOUSLY TO ENERGIZE SAID MOTOR TO ADVANCE SAID WEB, MEANS RESPONSIVE TO MOVEMENT OF SAID WEB TO PRODUCE PULSES WHOSE NUMBER DEPENDS ON THE DISPLACEMENT THEREOF AND MEANS TO APPLY SAID PULSES SUBTRACTIVELY TO SAID COUNTER WHEREBY AS SAID WEB ADVANCES THE COUNT HELD IN SAID COUNTER IS REDUCED AND SAID ANALOG VOLTAGE IS REDUCED ACCORDINGLY.