Abstract: Method and apparatus for use in X-ray cassette unloading and loading apparatus, including novel detection of presence or absence of film in the cassette and the position thereof in the upper or lower cassette part, utilizing radiation, such as infra-red, to which the film is not sensitive. Radiation is directed into each cassette part after opening and the radiation reflected from the respective parts is compared. The radiation means, as well as means for holding the cassette parts in open position and air jet means for releasing film from the upper cassette portion, are all mounted on parallelly moving guide members which engage the lateral edges of the cassette to position it.

Abstract: Apparatus for loading and unloading x-ray film cassettes of various sizes, using an air jet to release a sheet of film from a pivotally open upper cassette part, the air jet nozzle being carried by a lever arrangement such that the nozzle is moved upwardly with the upper cassette part as the latter moves to its open position.

Abstract: Cassette centering device for an X-ray cassette loading and unloading device using two parallelly movable guides engageable with the side edges of the cassette, the guides being movable by a lever arrangement driven by a motor, the lever arrangement including a link having two telescoping parts and biasing means constituting force absorbing means for cushioning the engagement of the guides with the cassette and compensating for motor overdrive.