Abstract: Apparatus for adjusting the temperature of a plurality of liquids which includes temperature adjusting means having a corresponding plurality of separate flow paths, a pump arrangement for circulating the liquids through said separate paths and means for maintaining predetermined temperature differences between the liquids, wherein the temperature adjusting means includes a single temperature controlling member and a number of pipes which correspond in number to the number of separate flow paths for the liquids of which the temperatures are to be adjusted. The temperature controlling member and the pipes are interconnected in heat conducting so that the total thermal impedance between the first of said pipes and the temperature controlling member integrated from the inlet end to the outlet end of said first pipe differs from the corresponding total thermal impedance of at least a second of said pipes.

Abstract: Small apparatus for developing photosensitive materials, in particular table-top apparatus, comprises a housing divided by partitions into a plurality of processing stations, for example a developing station, a fixing station and a washing station. Each of the stations comprises a trough containing the respective processing liquid. The photosensitive material to be developed is conveyed by transport rolls from an inlet, through the successive stations and out of an outlet. Liquid in a trough is circulated by a device comprising a magnetic rotor which rotates in a submerged rotor housing in the trough and has inlet openings in its cover and a tangential outlet opening in its periphery. The rotor is rotated by a rotating magnetic field arrangement outside the trough. In one embodiment it comprises a motor-driven permanent magnet. In another, it comprises magnetic coils arranged in a circle and energized sequentially.