Abstract: The filter cake in a filter press is heated by direct contact with a heating plate opposite the pressing membrane so that a vapor phase is generated which moves uniformly in a planar pressure front through the filter cake to dry residual liquid therefrom. The filter cake is maintained under vacuum during the drying step.

Abstract: A filter wall constructed separtely from the frame member is clamped in a clamping slot, to which toward the outside edge of the filter plate a widened sealing slot in a shoulder of the support is connected. A projecting edge of the filter wall extends into the latter slot with the shoulder overlapping, the filter wall having an annular flange directed to the outside. The seal is arranged in the sealing slot and has a U-shaped cross section with two arms extending inwardly, whose arms enclose and seal both sides of the annular flange and which seals the support on one side and the frame member on the other side. The spacing between the seal and the joint is sufficient that upon release of the closing pressure of the filter press, without disengaging it, the frame can be moved sufficiently far from the support that the pressurizable chamber is unsealed at the seal in the sealing slot.

Abstract: A developing device for a photographic layer carrier, particularly a film, includes two rotary transport roller pairs transporting a film in a horizontal direction over a bath containing a processing liquid. Two liquid-admitting chambers are positioned opposite to each other in spaced relationship to form a processing space through which the film is transported. Each chamber is subdivided into two portions by a comb-like partition which loosens vortexes generated in one chamber portion upon pumping the liquid thereinto and ensures a uniform distribution of the liquid discharged into the processing space through a slot provided in the second chamber portion.

Abstract: A filter-press plate assembly has a substantially rigid support plate having a face formed of a central region and an outer periphery bounding the region, a substantially rigid annular frame having an annular face at least closely confronting the support-plate face at the periphery, and a generally planar and elastically deformable central filter panel formed integrally with the frame and engageable with the central region within the periphery. The filter panel forms a pressurizable chamber with the support plate so that pressurization of the chamber can press a filter cloth lying on the filter panel toward another such filter cloth of an adjacent such assembly. An annular groove formed at the outer periphery in one of the faces is open toward the other face and an annular ridge formed on and projecting from the other face fits in this groove. Respective seal rings are recessed in the plate and frame and project oppositely therefrom at the outer periphery.