Patent ID: 6527209
Filing Date: 2003-03-04
Classification: B02C

Abstract:
A shedding apparatus comprising:a plurality of rotatable rolls, each one of said plurality of rolls being rotatable around an axis of rotation in a first direction of rotation or a second direction of rotation, and each said roll having a plurality of angled teeth, said plurality of teeth arranged in at least one first set of teeth arranged in a first helical line across an outer surface of each of said rolls, circumferentially spaced apart a first angle and facing said first direction of rotation, and at least one second set of teeth arranged in a second helical line across said outer face of each of said rolls, circumferentially spaced apart said first angle and facing said second direction of rotation, said first helical line and said second helical line of teeth arranged to axially move material to be shredded when said rolls are rotated; a frame structure having roll holding means, for journalling said plurality of rolls in a spaced apart relationship to form a bed of said plurality of rolls, said frame structure being surrounded by an enclosure provided with a charging open for material to be shredded and a discharging opening for shredded material; a reversible drive means for supplying rotation force to rotate said plurality of rolls; and a plurality of gear means, arranged one for each said roll, for transferring said rotation force from one roll to an adjacent roll so that adjacent rolls rotate in opposite directions of rotation, wherein said each said roll of said plurality of rolls arranged in a middle portion of said bed of rolls are held in a lower position compared to said rolls arranged towards either of two outer sides of said bed of rolls, forming sloping sides of said bed of rolls down towards the middle of said bed of rolls in the longitudinal direction of said bed of rolls, to force material to be shredded to be moved from said outer sides to said middle portion of said bed of rolls.