Electrosensitive printing apparatus with print head continuously moved across paper

Claim 1

IN A PRINTER FOR PRINTING ELECTRICALLY ON ELECTROSENSITIVE RECORD MATERIAL BY MEANS OF A PRINT HEAD TRAVERSING SAID RECORD MATERIAL IN A CONTINUOUS MOVEMENT IN A RECIPROCATING MANNER, PRINT HEAD MEANS INCLUDING A PRINT HEAD, GUIDE SHAFT MEANS FOR SUPPORTING SAID PRINT HEAD AD JACENT SAID RECORD MATERIAL FOR RECIPROCAL MOVEMENT THEREOF ACROSS THE WIDTH OF SAID MATERIAL, DRIVING MEANS FOR DRIVING SAID PRINT HEAD FROM ONE END OF SAID GUIDE SHAFT MEANS TO THE OTHER AT AN ESSENTIALLY CONSTANT RATE, MOTOR MEANS FOR ENERGIZING SAID DRIVING MEANS, CLUTCH MEANS AND ACTUATING MEANS THEREFOR FOR CONNECTING SAID MOTOR MEANS TO SAID DRIVING MEANS IN RESPONSE TO A CONTROL SIGNAL, SAID CLUTCH MEANS COMPRISING A SHAFT DRIVEN BY SAID MOTOR MEANS, A FIRST HUB AFFIXED TO SAID SHAFT, A SECOND HUB ROTATABLY MOUNTED ON SAID SHAFT, AND MEANS RESPONSIVE TO SAID ACTUATING MEANS FOR COUPLING SAID FIRST AND SECOND HUBS FOR CONJOINT ROTATION ABOUT SAID SHAFT UNDER CONDITIONS WHERE SAID DRIVING MEANS IS DRIVING SAID PRINT HEAD, MEANS FOR DEACTIVATING SAID CLUTCH MEANS AUTOMATICALLY IN RESPONSE TO SAID PRINT HEAD BEING MOVED TO AND OCCUPYING SAID OTHER END OF SAID GUIDE SHAFT MEANS, SAID DEACTIVATING MEANS OPERATIVELY CONNECTED TO SAID RESPONSIVE MEANS TO DECOUPLE SAID HUBS REGARDLESS OF SHAFT ROTATION.