Abstract: A machine is provided including a receptacle for loading waste, a shredder, and a pusher to push waste toward the shredder. The receptacle has a constant cross-section between a waste loading opening and a communication opening with the shredder, and the pusher is a plate translatable in the receptacle, parallel to the axis along which the receptacle has the constant cross-section. The plate is dimensioned such that only an interstice exists between the plate edge wall and the walls defining the receptacle; the plate is movable between a withdrawn position able to be freed from said waste loading opening, and an end-of-travel position situated near the communication opening. The machine comprises a sealing gasket movable between a retracted position, which does not hinder the mobility of the plate in the receptacle, and a sealing position, which produces, in the end-of-travel position of the plate, sealing between the plate and the receptacle walls.

Abstract: A machine is provided including a shredder formed by at least two parallel series of contrarotating knives, alternating with counter-knives. The knives are carried by shafts and the edge of each counter-knife facing the opposite knife associated thereto has an arcuate portion. At least one counter-knife has a portion extending above the axis of the shaft and forming an arcuate edge centered on the axis of the other shaft of the shredder, this arcuate edge completing the arcuate portion. The arcuate portion has a notch formed on it, opening into the arcuate edge formed by this arcuate portion, and forming a tip oriented toward the upstream side of the counter-knife.

Abstract: A machine including a receptacle for loading waste, a shredder, and a pusher to push waste toward this shredder; the receptacle has a constant cross-section between a waste loading opening and a communication opening with the shredder; and the pusher is a plate translatable in the receptacle, parallel to the axis along which this receptacle has said constant cross-section, this plate having dimensions where only an interstice exists between the plate edge wall and the walls defining the receptacle; the plate is movable between a withdrawn position able to be freed from said waste loading opening, and an end-of-travel position situated near said communication opening; The machine comprises a sealing gasket movable between a retracted position, which does not hinder the mobility of the plate in the receptacle, and a sealing position, which produces, in said end-of-travel position of the plate, sealing between the plate and the receptacle walls.

Abstract: A machine including a shredder formed by at least two parallel series of contrarotating knives, alternating with counter-knives; the knives are carried by shafts; the edge of each counter-knife facing the opposite knife associated thereto comprises an arcuate portion. At least one counter-knife has a portion extending above the axis of the shaft and forming an arcuate edge centered on the axis of the other shaft of the shredder, this arcuate edge completing said arcuate portion; said arcuate portion has a notch formed on it, opening into the arcuate edge formed by this arcuate portion, and forming a tip oriented toward the upstream side of the counter-knife.