Abstract: Apparatus for extracting used portions of filter media sheets from between vertically stacked and separated plates of a liquid filtering apparatus and for simultaneously advancing fresh portions of the filter media sheets from supply rolls into the space between the vertically separated plates comprises a plurality of vertically arranged clamps on the downstream side of the filter plates adapted to engage and firmly grip the opposite lateral edge portion of the sheets, the clamps being mounted on a carriage which is reciprocated through a linear generally horizontal stroke.