16 substantially in alignment with the path of the endless filter screen 12 as it extends along the inclined framework 15 attached to the lower surface of the stock guiding plate 46 is supporting means 47 for a doctor blade 49 adapted to extend across the surface of the compacting roller 14 and positioned to scrape the surface free of any stock adhering thereto the stock is thereby diverted to a screw conveyor 50 for discharge from the apparatus in any suitable manner as is well known in the art the screw conveyor 50 may be suitably powered separately or may be driven by pulley means attached to the compacting drum 14 watered stock inlet means includes an inlet pipe 51 which at least in part may be made of flexible material the inlet pipe 51 discharges stock into an overflow tank 52 having walls 54 and an overflow partition 55 watered inlet stock is passed through the pipe into the overflow tank and discharged onto the endless filter screen 12 at least one washing station is provided and supplied with washing water through a pipe 56 supplying a bottomless tank 57 having an end wall 59 at the lower end of the end wall 59 is a flexible doctor blade 60 fig1 which scrapes against the surface of the endless filter screen 12 if desired one or more additional washing stations may be provided as shown in which a supply pipe 61 leads water to a bottomless tank 62 having an end wall 64 likewise fitted with a doctor blade 65 fig1 underneath and supported by the screen supporting frame 15 is a collection tank 66 provided with an at least partially flexible drainage pipe 67 an.