Device for opening the insertion slot of a slide frame

Abstract From the Canadian patent

A device for opening a film opening insertion slot formed by a border strip and by a flat of a slide frame. It comprises a film guiding member having an elongated passage for transversally guiding the film and an insertion-slot opening portion located forwardly of the passage. The device also comprises a slot-opening combination on the slot-opening portion, which combination includes a downwardly inclined border-strip ramp leading toward the bottom of the film passage and an upwardly inclined flap ramp leading toward the top of the film passage) the border-strip ramp being located forwardly of the flap ramp with respect to the passage. As a slide frame is displaced linearly edgewise with …