Sealed photographic film unit containing a liquid

Claim 1

A PHOTOGRAPHIC PRODUCT CONTAINING A PHOTOGRAPHIC REAGENT AND COMPRISING A FIRST LIQUIDCONFINING LAYER CONSTITUTING A PHOTOGRAPHIC ELEMENT HAVING A PHOTOSENSITIVE PORTION WHICH IS CAPABLE OF HAVING AN IMAGE FORMED IN A PREDETERMINED AREA THEREOF UPON PHOTOEXPOSURE, A SECOND LIQUID-CONFINING LAYER, A RUPTURABLE CONTAINER HOLDING A LIQUID, SAID LAYERS BEING ATTACHED TOGETHER TRANSVERSELY THEREOF ADJACENT ONE END OF ONE OF SAID LAYERS TO PERMIT SAID LAYERS TO BE SEPARATED FOR EXPOSURE OF SAID AREA AND THEN SUPERPOSED WITH SAID LIQUID HELD BY SAID CONTAINER SO AS NOT TO WET SAID LAYERS AND WITH SAID CONTAINER BEING ADJACNET SAID END FOR RELEASING SAID LIQUID BETWEEN SAID LAYERS, AND SEALING MATERIAL EXTENDING ALONG THE LONGITUDINAL MARGINS OF ONE OF SAID LAYERS IN A POSITION TO FORM A SEAL WITH THE LONGITUDINAL MARGINS OF SAID OTHER LAYER UPON SUPEROSITION OF SAID LAYERS SO AS TO PREVENT LEAKAGE OF SAID LIQUID FROM THE LONGITUDINAL EDGES OF SAID PRODUCT WHEN SAID LIQUID IS RELEASED FROM SAID CONTAINER AN SPREAD, UNDER PRESSURE, LENGTHWISE OF SAID TWO LIQUID-CONFINING LAYERS, AT LEAST ONE OF SAID TWO LIQUID-CONFINING LAYERS BEING SUFFICIENTLY FLEXIBLE AND DEFORMABLE TO PERMIT A CONCENTRATED PRESSURE APPLIED TO THE OUTER SURFACES OF SAID PRODUCT TO BE TRANSMITTED THROUGH SAID FLEXIBLE LAYER TO RUPTURE THE SEAL OF SAID CONTAINER AND TO DISCHARGE THE LIQUID CONTENT OF THE CONTAINER OVER SAID PHOTOSENSITIVE ELEMENT, SAID PHOTOSENSITIVE PORTION COMPRISING AS ITS PHOTOSENSITIVE MATERIAL A SALT FROM THE CLASS CONSISTING OF (A) THE PHOTOSENISTIVE FERRIC SALTS (B) THE PHOTOSENSITIVE DIAZONIUM SALTS, AND (C) HEAVY METAL SALTS CAPABLE OF FORMING A LATENT IMAGE UPON PHOTOEXPOSURE AND CAPABLE OF DEVELOPMENT TO PRODUCE A VISIBLE IMAGE COMPRISING THE METAL OF SAID SALT,SAID LIQUID, UPON PERMEATION OF SAID PHOTOSENSITIVE ELEMENT, RENDERING SAID PHOTOGRAPHIC REAGENT EFFECTIVE TO PRODUCE A CHEMICAL TRANSFORMATION IN SAID PHOTOSENSITIVE ELEMENT.