Method of manufacturing photographic film unit

Abstract

Abstract METHOD OF PRODUCING A PHOTOGRAPHIC FILM UNIT ADAPTED TO BE EXPOSED AND PROCESSED TO PRODUCE A COLOR IMAGE, COMPRISING LAMINATING FIRST AND SECOND SHEETS IN FACE-TOFACE RELATION AND ATTACHING A RUPTURABLE CONTAINER OF A PROCESSING LIQUID TO THE EXTERIOR OF THE SHEETS FOR DISPENSING ITS LIQUID CONTENTS BETWEEN THE SHEETS. THE FILM UNIT IS ADAPTED TO BE PROCESSED BY PROGRESSIVELY APPLYING COMPRESSIVE PRESSURE TO THE CONTAINER AND SHEETS TO SPREAD THE PROCESSING LIQUID BETWEEN THE SHEETS WITH DELAMINATION AND LAMINATION OCCURRING DURING AND BY VIRTUE OF SPREADING OF THE PROCESSING LIQUID. THE SHEETS ARE FORMED BY COATING AT LEAST ONE OF A PAIR OF LAYERS WITH AT LEAST A PLURALITY OF LAYERS INCLUDING A WATER-SOLUBLE, POLYMERIC LAYER CONTAINING A PLURALITY OF PHOTOSENSITIVE, IMAGE-RECORDING STRATA, E.G., DIFFERENTLY SENSITIZED GELATINO SILVER HALIDE EMULSIONS. THE OTHER SHEET INCLUDES A DIMENSIONALLY STABLE LAYER WHICH MAY BE COATED WITH ONE OR MORE PROCESSING SOLUTION SOLUBLE OR PERMEABLE, POLYMERIC LAYERS SUCH AS A DYEABLE POLYMER. EACH OF THE LAYERS OF THE FILM UNIT IS PREFERABLY COATED ON ITS RESPECTIVE DIMENSIONALLY STABLE LAYER OR SUPPORT AS AN AQUEOUS SYSTEM AND DRIED PRIOR TO LAMINATION OF THE TWO SHEETS WITH THE POLYMERIC LAYERS SANDWICHED THEREBETWEEN. THE TWO SHEETS ARE LAMINATED TO ONE ANOTHER BY PROGRESSIVELY PRESSING THE SHEETS INTO SUPERPOSITION WHILE DISTRIBUTING AN AQUEOUS SOLUTION OF A WATER-SOLUBLE POLYMERIC MATERIAL BETWEEN THE SHEETS TO FORM A BOND THAT IS ADAPTED TO RUPTURE READILY AND CLEANLY BY AND IN RESPONSE TO SPREADING OF THE PROCESSING LIQUID AND IS WEAKER THAN THE BOND BETWEEN ANY OTHER LAYERS OR STRATA OF THE FILM UNIT.

Inventors

• 👤 E Land

Bibliographic Details