Tape driving mechanism

Claim 1

IN A TAPE DRIVING MECHANISM FOR USE WITH A MAGNETIC TAPE MACHINE, A SUPPORTING STRUCTURE, A POWER DRIVEN CAPSTAN JOURNALLED ON SAID SUPPORTING STRUCTURE AND HAVING A SURFACE FOR FRICTIONAL DRIVING ENGAGEMENT WITH ONE SIDE OF THE TAPE TO BE DRIVEN THEREBY, AN IDLE PRESSURE ROLLER ADAPTED TO ENGAGE THE SIDE OF THE TAPE OPPOSITE THAT ENGAGED BY THE CAPSTAN SO AS TO MAINTAIN THE TAPE IN FRICTIONAL DRIVING ENGAGEMENT WITH THE CAPSTAN, MEANS MOUNTING SAID PRESSURE ROLLER ON SAID SUPPORTING STRUCTURE FOR ARCUATE SWINGING MOVEMENTS TOWARD AND AWAY FROM SAID CAPSTAN BETWEEN AN INOPERATIVE POSITION RELATIVELY WIDELY SPACED THEREFROM AND AN OPERATIVE TAPE DRIVING POSITION WHEREIN SAID PRESSURE ROLLER PRESSES SAID TAPE INTO DRIVING ENGAGEMENT WITH SAID CAPSTAN AND WHEREIN THE AXIS OF SAID PRESSURE ROLLER IS GENERALLY PARALLEL WITH THE AXIS OF SAID CAPSTAN, MEANS FOR ACTUATING SAID SWINGING MOVEMENTS OF SAID PRESSURE ROLLER, AND ADJUSTMENT MEANS FOR SLIGHTLY VARYING THE OPERATIVE POSITION OF SAID PRESSURE ROLLER WHEREBY TO ADJUST SAID MACHINE FOR PARALLELISM BETWEEN THE RESPECTIVE AXES OF THE PRESSURE ROLLER AND THE CAPSTAN.