MARKING DEVICES FOR X-RAY FILM

The X-ray film is enclosed within a light-tight holding device, so arranged that the X-ray exposure is made with the film therein. An electro-luminescent lamp in the form of a flat plate is mounted in the holding device, which has a light-trap slot for the insertion of an identification card between the lamp and the film. The lamp is energized in connection with the X-ray exposure, so that a latent photographic image is produced on the film, to correspond with the identifying markings on the card. In one embodiment, the electro-luminescent lamp is mounted within a cassette, adapted to hold an X-ray film. The identification card is movable into direct engagement with the film. The cassette is provided with contacts whereby the lamp is connected to an energizing circuit when the cassette is mounted in its exposure position. In another embodiment, a fiber optic plate is provided between the identification card and the film to transmit an image of the identifying markings to the film. This construction makes it possible to feed the film into and out of the holding device, from a supply magazine to a receiving magazine.