Abstract: A developing tray for feeding a sheet of positive material and a sheet of negative material through a bath of developer, above which bath a lid is mounted for reducing the evaporation of developer, feed rollers being provided at both the input opening and the output opening, and whereby the bottom of the tray is provided with ribs extending substantially in the feed direction of the sheets. The length of the developing tray is primarily determined by the fact that a predetermined developing time is necessary. Furthermore the material in question must be fed through the bath at a predetermined speed in order to ensure a predetermined turbulence in the developer. The bath must therefore be of a certain minimum length. A problem is therefore caused by small sheets unable to reach the rollers at the output opening. The same developing tray also can be used in connection with light sensitive materials of a small size, e.g.

Abstract: A developing tray for feeding a sheet of positive material and a sheet of negative material through a bath of developer. A lid is mounted above the bath for reducing the evaporation of developer. Feed rollers are provided both at the input opening and at the output opening. The bottom of the tray is provided with ribs extending substantially in the feeding direction of the sheets. A wetting roller at the output opening is actuated by the feed rollers and is partly immersed in the developer. The evaporation from the output rollers and the wetting roller thereby provides a cooling compensating for the heat produced by the motor during the developing process. In this way a substantially constant temperature is maintained in the bath without special temperature adjusting devices as the cooling is proportional to the period of operation of the motor.