SU24703A1 - Device for the maturation of photographic emulsions - Google Patents

Description

When cooking an emulsion, in order to ripen it, a certain temperature and the exact time of action of this temperature are required. With a significant amount of emulsion, it is difficult to transfer heat evenly to each of the particles of a ripened grain of the emulsion. The various stirrer systems used for this purpose do not reach the goal, since there is no guarantee that all particles will be under the same conditions with respect to the heat transferred, for example, the walls of the vessel in which the emulsion is located and through which the heat energy is usually transferred to the emulsion .

The proposed device aims to deliver each particle of the emulsion to uniform thermal conditions.

The device, shown in vertical section on the attached drawing, consists of two vessels / and 5, connected between themselves by thin tubes 2, enclosed in a vessel 4 with warm water.

The emulsion that is melted and to be further ripened is poured into vessel 1, from which, due to its gravity or air pressure (for example, through pipe 6), flows through pipes 2 into the lower vessel 5. Due to the insignificant uniform diameter of these pipes and the vessel creates the same conditions for all-emulsion particles passing through these tubes. Once heated, the emulsion enters the lower vessel 5, for further maturation it can be lifted into the upper vessel along the same tubes (for example, air pressure through tube b). The temperature of the fluid heating tube 2 for the purpose of uniform maturation of the particles can be changed during the process of passing these particles through the tubes. Thus, at the beginning of ripening, this temperature rises progressively to the required limit, and at the end of ripening gradually decreases. The created air pressure in the vessels when the emulsion enters them can be eliminated with air taps 5. The vessels / and 5 can be thermally insulated to maintain the same thermal conditions.

The described movement of the emulsion from the upper to the lower vessel and back can be carried out several times until fully matured. The ripened emulsion can be removed through the valve 8 of the vessel 3,

The subject matter of the invention.

1. A device for the maturation of photographic emulsions, characterized by the use of two vessels 7 and 3, connected to each other by means of a series of small diameter tubes 2, enclosed in a vessel 4 with heated water.

2. The form of the device specified in paragraph 1, characterized in that, in order to pump the emulsion from the lower vessel through the tubes 2 back to the upper one, as well as to quickly transfer the emulsion from the upper vessel to the lower one, both vessels are 1 tl . 3 are connected to each other by a tube b from a compressor or an air pump.