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Claim 1

APPARATUS FOR USE WITH A CAMERA HAVING A LENS SYSTEM AND A FILM UPON WHICH EXPOSURES OF FIRST AND SECOND DIMENSIONS ARE DESIRED COMPRISING, IN COMBINATION: AN ENDLESS BELT OF OPAQUE MATERIAL HAVING A FIRST LIGHT TRANSMITTING PORTION WITH A FIRST DIMENSION SUBSTANTIALLY EQUAL TO THE DESIRED FIRST DIMENSION OF THE EXPOSURE AND WITH A SECOND DIMENSION SUBSTANTIALLY TWICE THE DESIRED SECOND DIMENSION OF THE EXPOSURE, HAVING A SECOND LIGHT TRANSMITTING PORTION WITH A FIRST DIMENSION AT LEAST AS GREAT AS THE DESIRED FIRST DIMENSION OF THE EXPOSURE AND WITH A SECOND DIMENSION OF PREDETERMINED AMOUNT, SAID FIRST AND SECOND LIGHT TRANSMITTING PORTIONS BEING SUBTANTIALLY OPPOSITELY PLACED UPON SAID BELT; FIRST ROLLER MEANS MOUNTING SAID BELT FOR MOTION ALONG ITS LENGTH; SECOND ROLLER MEANS BEARING ON SAID BELT TO BRING OPPOSITE SIDES OF SAID BELT CLOSELY ADJACENT ONE ANOTHER THROUGHOUT A PREDETERMINED PORTION OF THE LENGTH OF SAID BELT; MEANS MOUNTING SAID FIRST ROLLER MEANS AND SAID SECOND ROLLER MEANS IN SAID CAMERA SO THAT SAID BELT LIES BETWEEN THE LENS SYSTEM AND THE FILM WITH THE PREDETERMINED PORTION OF THE LENGTH OF SAID BELT ADJACENT THE FILM; AND DRIVE MEANS CONNECTED TO SAID FIRST ROLLER MEANS TO CAUSE SAID BELT TO MOVE ALONG ITS LENGTH AN AMOUNT SUFFICIENT TO CAUSE SAID FIRST LIGHT TRANSMITTING PORTION TO PASS SAID SECOND LIGHT TRANSMITTING PORTION WITHIN THE PREDETERMINED PORTION OF THE LENGTH OF SAID BELT EACH HALF CYCLE SO THAT LIGHT FROM THE LENS SYSTEM PASSES THROUGH SAID FIRST LIGHT TRANSMITTING PORTION AND SAID SECOND LIGHT TRANSMITTING PORTION TO EXPOSE THE FILM.