extraction plate a further most important advantage especially when the extraction plate is provided with relatively small holes as stated is that the extracted slurry is unusually free of contaminants particularly small plastic pieces as well as dirt and this greatly reduces the load on and wear of the subsequent cleaning and screening stations which are necessary to complete preparation of the recovered fiber for reuse fig3 shows a variation of the provision for handling the material picked up by the furnish remover conveyor buckets 40 in fig3 the collection box 70 has a slanted bottom plate 71 which extends through an opening 72 in the side of the tower 31 into overhanging relation with a bin 75 the portion of slanted bottom plate 71 within the box 70 is shown as perforate so that liquid can drain therethrough into the tower along with fiber and other small particles this collection box arrangement may be provided also with one or more showers discharging from the top of the tower to rinse fiber free from the trash which accumulates in the box it should also be noted that the invention is in no way limited to any particular type of pulper or rotor arrangement therein so long as the pulper has an associated junk remover typical such other.