Wet treatment tank with rollers for film strips - with rollers driven by revolving shaft for simple reliable conveyance

摘要

Wet treatment apparatus for photographic film strips comprises a treatment tank through which the film strip is conveyed along a U-shaped path over rollers (4) and in which at least one roller is driven according to the tension applied to the film strip. On the driven rollers are coupling elements (22', 23') which provide a positive-locking connection to a driven shaft (21') when the roller is loaded. The roller pref. comprises a roller body which is retained in a central position by spring elements when unloaded, with its axis coinciding with the centre line of a supporting shaft (20), but which is deflected into an eccentric position when loaded.