a system for enabling x - ray films , of the type primarily used in the dental and medical fields , to be handled in daylight for exposure to x - rays . the system utilizes identical film sheets emulsion coated on one or both faces , each sheet having a notch , displaced from the sheet center line , formed in one edge thereof . a stack of sheets is packed in an opaque envelope with the sheets being alternated so that all of the notches lie along a common stack edge arranged in two parallel rows , the notches in adjacent sheets lying in different rows . the system includes a light tight dispenser which receives the envelope and is capable of being operated to strip the envelope from the film sheet stack . the dispenser includes a pair of rotatable selector cams , each aligned with a different row of notches . a spring mounted back - up plate urges the film sheet stack against the selector cams with the two selector cams respectively bearing against notched and unnotched portions of the top sheet . means are provided for alternately rotating the two cams so as to successively release the top sheet from the stack into a cassette removably engaged with the dispenser . the cassette includes parallel screens normally spring urged together in light tight relationship when disengaged from the dispenser . engagement of the cassette with the dispenser in light tight relationship urges the screen plates apart to enable the released film sheet to fall therebetween . the cassette in turn operatively cooperates with a processor to enable the film sheet therein to be transferred to the processor .