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AssigneeFuji Photo Film Co., Ltd.
InventorsKunio Mutoh, Akira Kojima
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A method of gelation of a photographic emulsion, oil in water emulsion, or a gelatin-containing solution comprising continuously rapidly cooling the photographic emulsion, oil in water emulsion, or the gelatin-containing solution, which has good thermal efficiency and requires no adjustment of the amount of water contained in the rapidly cooled product prior to use, and a unit therefor comprising a static mixer-installed double pipe for rapidly cooling the photographic emulsion, oil in water emulsion, or the gelatin-containing solution by a conduction type heat exchange system, and a double pipe without static mixer for conveying the rapidly cooled product to a storage vessel while avoiding adhesion of the rapidly cooled product transformed into a gel state to the inside surface of the inner pipe of the double pipe by warming the inner pipe with water kept at 30.degree. C., although transformation of the rapidly cooled product to a gel state successively proceeds in an inner portion of the inner pipe.
A method of gelation of a photographic emulsion, oil in water emulsion containing gelatin, or a gelatin solution which comprises the steps of continuously rapidly cooling the photographic emulsion, oil in water emulsion, or the gelatin solution in a sol state to a sol-gel transformation point temperature or lower by a conduction heat exchange system to obtain a rapidly cooled product, and conveying said rapidly cooled product to a storage vessel before transformation to a gel state.
A method of gelation of a photographic emulsion, oil in water emulsion containing gelatin, or a gelatin solution which comprises the steps of continuously rapidly cooling the photographic emulsion, oil in water emulsion, or gelatin solution in a sol state to a sol-gel transformation point temperature or lower by a conduction heat exchange system to obtain a rapidly cooled product, and continuously conveying said rapidly cooled product through a pipe to a storage vessel cooled to the sol-gel transformation point temperature or lower before transformation to a gel state while keeping the outside of the pipe at the sol-gel transformation point temperature or higher to avoid adhesion of said rapidly cooled product being transformed into a gel state to the inside surface of the pipe.
Dependencies are inferred from the claim text.