Easily threaded projector

Claim 1

IN A MOTION PICTURE PROJECTOR, A STATIONARY APERTURE PLATE, A PAIR OF SPROCKETS BRACKETING THE APERTURE PLATE AND SPACED FORWARDLY OF THE APERTURE PLATE, CARRIAGE MEANS MOVABLE BETWEEN THE SPROCKETS TOWARD AND AWAY FROM THE APERTURE PLATE, A PAIR OF SPROCKET GUARDS CARRIED BY THE CARRIAGE MEANS, EACH SPROCKET GUARD HAVING AN ELONGATED STRAIGHT PORTION MOVABLE SUBSTANTIALLY TANGENTIALLY ALONG ONE OF THE SPROCKETS AS THE CARRIAGE MEANS IS MOVED TOWARD THE APERTURE PLATE, EACH SPROCKET GUARD ALSO HAVING AN ARCUATE PORTION MOVABLE TO ONE OF THE SPROCKETS AS THE CARRIAGE MEANS NEARS THE END OF ITS MOVEMENT TOWARD THE APERTURE PLATE, A PRESSURE PLATE CARRIED BY THE CARRIAGE MEANS TO AND FROM THE APERTURE PLATE, MEANS FOR ROTATING THE SPROCKETS TO ADVANCE FILM IN THE SAME DIRECTION WHEN THE PRESSURE PLATE IS ADJACENT TO THE APERTURE PLATE, AND MEANS OPERABLE BY MOVEMENT OF THE CARRIAGE MEANS TOWARD THE SPROCKETS FOR ROTATING THE SPROCKETS TO BOTH ADVANCE THE FILM TOWARD THE APERTURE PLATE AS THE CARRIAGE MEANS MOVES THE PRESSURE PLATE TO THE APERTURE PLATE AND TO FORM LOOPS BETWEEN THE SPROCKETS AND THE APERTURE PLATE.