Film guide means for cinematographic projectors

Claim 1

IN A CINEMATOGRAPHIC PROJECTOR GUIDE MEANS FOR A FILM STRIP COMPRISING A GUIDE PLATE, A PAIR OF GUIDE RAILS ON SAID GUIDE PLATE DEFINING A PATH FOR A FILM STRIP, THERE BEING AN IMAGE APERTURE AND A SECOND APERTURE IN SAID GUIDE PLATE, GRIPPER MEANS PROJECTING THROUGH SAID SECOND APERTURE AND ENGAGING THE FILM STRIP FOR MOVING THE FILM STRIP ON SAID GUIDE PLATE, A PRESSURE MEMBER PIVOTALLY MOUNTED AT ITS CENTRAL PORTION ON SAID GUIDE PLATE AND HAVING A FIRST CONTACT PORTION AT ONE OF ITS ENDS AND A SECOND CONTACT PORTION AT ITS OPPOSITE END, SAID SECOND CONTACT PORTION BEING LOCATED BEYOND SAID GRIPPER MEANS IN THE DIRECTION OF TRAVEL OF SAID FILM STRIP, SAID PRESSURE MEMBER HAVING A RESTING POSITION AND AN OPERATIVE POSITION, AND RESILIENT MEANS URGING SAID PRESSURE MEMBER TOWARDS THE PATH OF THE FILM STRIP SO THAT SAID SECOND CONTACT PORTION, IN SAID RESTING POSITION, PROJECT INTO THE PATH OF THE FILM STRIP IN THE ABSENCE OF THE LATTER, SAID SECOND CONTACT PORTION BEING MOVED BACK AGAINST THE INFLUENCE OF SAID RESILIENT MEANS BY THE TRAVELLING FILM STRIP INTO SAID OPERATIVE POSITION WHEREIN SAID FIRST CONTACT PORTION AND SAID SECOND CONTACT PORTION ARE IN PRESSURE CONTACT WITH THE FILM STRIP SO AS TO MAINTAIN THE SAME ON SAID PATH DEFINED BY SAID GUIDE RAILS.