Flat bed filter has an endless band (6) and a lateral filter chamber (12) boundary. There are conveyance rollers (114) along the upper strand of the belt at its lateral edge, in the lower region or below the lateral boundary (16, 18, 108). There is a flexible stretched sealing lip (124) on the inner belt side of each roller (114). Also claimed is a mounting (152) with a fitting for the scraping ledge of a filter belt (6), esp. as above, which is formed such that the scraping ledge (154) always lies against the belt (6) at a suitable tension.
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