Photographic film unit having a frangible fluid container therein

Claim 1

A PHOTOGRAPHIC PRODUCT INCLUDING A PHOTOGRAPHIC REAGENT FOR PRODUCING A TRANSFORMATION OF AN IMAGE IN SAID PRODUCT, SAID PRODUCT COMPRISING A FIRST LIQUID-CONFINING LAYER, A SECOND LIQUID-CONFINING LAYER AND A CONTAINER RELEASABLY HOLDING A PROCESSING LIQUID AND HAVING FRANGIBLE PORTIONS FORMED OF A BRITTLE FRANGIBLE MATERIAL, SAID MATERIAL BEING SUBSTANTIALLY IMPERVIOUS TO OXYGEN, TO SAID LIQUID AND TO VAPORS THEREOF AND BEING CAPABLE OF FRACTURE UPON APPLICATION OF COMPRESSION THERETO, SAID CONTAINER BEING SURROUNDED BY AND SECURED TO ONE OF SAID LAYERS BY MEANS OF A DEFORMABLE FILTER ENVELOPE POROUS TO THE LIQUID IN SAID CONTAINER, SAID LAYERS AND SAID CONTAINER BEING ASSOCIATED TOGETHER SO AS TO PERMIT SAID LAYERS TO BE SUPERPOSED WITH SAID CONTAINER POSITIONED FOR RELEASING ITS LIQUID BETWEEN SAID LAYERS, SAID PHOTOGRAPHIC PRODUCT INCLUDING A PHOTOSENSITIVE PORTION WHICH IS LOCATED BETWEEN SAID LAYERS WHEN THE LATTER ARE SUPERPOSED SO THAT THE LIQUID CONTENT OF SAID CONTAINER, UPON RELEASE BETWEEN SAID LAYERS, PERMEATES SAID PHOTOSENSITIVE PORTION, AT LEAST ONE OF SAID LIQUID-CONFINING LAYERS BEING SUFFICIENTLY FLEXIBLE TO PERMIT A CONCENTRATED EXTERNALLY APPLIED PRESSURE TO BE TRANSMITTED THERETHROUGH TO CAUSE THE FRACTURE OF SAID CONTAINER AND THE DISTRIBUTION OF THE LIQUID FROM SAID CONTAINER BETWEEN SAID LIQUID-CONFINING LAYERS, SAID PHOTOSENSITIVE PORTION COMPRISING AS ITS PHOTOSENSITIVE MATERIAL A SALT FROM THE CLASS CONSISTING OF (A) THE PHOTOSENSITIVE 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.