Abstract: Apparatus for continuous separation of solid-fluid mixtures comprising means for routing an endless band of filter cloth folded to form an endless tube which is longitudinally openable and closable to permit introduction of a mixture into the tube for filtering, and removal of solids following filtering. Means for introducing a mixture into the tube are followed by a filter unit which is adjustable in cross sectional flow area. The inlet means and filter unit are assembled on a first frame. A second frame outfitted with means for opening the tube for discharge of solids follows. The two frames are separable to provide a modular construction. Press units, also of modular construction, can be interposed between said frames, also as modules, and means are provided for adjusting the pressure exerted by the press units.