Abstract: A feeder device for reducing the size of unshredded scrap material prior to entering a shredder to permit a reduction in size of the shredder and reduction in required power needed for shredding. The feeder device includes a vertically-declining feed chute having a receiving end for receiving scrap material and a depositing end for depositing scrap material, the receiving end having a greater width. The feed chute has a compactor plate and may have multiple compactor plates each movable by a controlled actuator and located between the receiving end and the depositing end. The compactor plate lateral moves in an arcuate manner traverse to a longitudinal axis of the feed chute for compacting scrap material. Subsequent the feed chute, at least one powered rotating drum vertically compacts the material, the material then entering a shredding chamber where a shredding rotor shreds the material, the material generally being comprised of metal.