Aperture card cleaner

Claim 1

APPARATUS FOR CLEANING DATA STORAGE CARDS HAVING MICROFILM FRAMES MOUNTED THEREIN, SAID APPARATUS INCLUDING A COMPARTMENT HAVING A CARD RECEIVING SLOT AND A CARD DELIVERY SLOT FOR A CARD TO ADVANCE THERETHROUGH AND AN AIR INLET OPENING AND AN AIR DISCHARGE OPENING, POWER DRIVEN CONVEYOR MEANS TO ADVANCE CARDS ONE AT A TIME THROUGH SAID COMPARTMENT, A PAIR OF BRUSHES CONTRA-ROTATABLY MOUNTED IN SAID COMPARTMENT IN POSITION TO BRUSH DUST PARTICLES SUBSTANTIALLY SIMULTANEOUSLY FROM BOTH SIDES OF CARDS ADVANCED THROUGH SAID COMPARTMENT BY SAID CONVEYOR MEANS, CARD GUIDE MEANS FOR GUIDING CARDS FROM SAID CARD RECEIVING SLOT AND BETWEEN SAID CONTRA-ROTATABLY MOUNTED BRUSHES TO SAID CARD DELIVERY SLOT, SAID CARD GUIDE MEANS INCLUDING SPACED CARD GUIDE MEMBERS WHICH ARE ARRANGED TO PERMIT COMPLETE CLEANING OF THE UPPER AND LOWER SURFACE OF MICROFILM IN EACH CARD AND TO PERMIT SUBSTANTIALLY COMPLETE CLEANING OF THE UPPER AND LOWER SURFACE OF EACH CARD, DRIVE MEANS CONNECTED TO SAID BRUSHES FOR ROTATING SAID BRUSHES, ION DISCHARGE MEANS POSITIONED IN SAID COMPARTMENT FOR APPLYING A CONSTANTLY REVERSING ELECTROSTATIC FIELD TO NEUTRALIZE THE STATIC CHARGE ON THE CARDS PASSED THROUGH SAID COMPARTMENT, SAID ION DISCHARGE MEANS INCLUDING A FIRST INDUCTOR POSITIONED ABOVE THE PATH OF TRAVEL OF CARDS AND A SECOND INDUCTOR POSITIONED BELOW THE PATH OF TRAVEL OF CARDS THROUGH SAID COMPARTMENT, AND MEANS CONNECTED TO SAID AIR DISCHARGE OPENING OF SAID COMPARTMENT FOR EFFECTING THE FLOW OF AIR THROUGH SAID COMPARTMENT TO REMOVE DUST PARTICLES BRUSHED FROM A CARD BY SAID BRUSHES AS THEY ROTATE.