Abstract: A shredder (1) is provided for comminuting organic material to form shreds. The shredder has a shredding chamber (2) provided with rotatable cutting devices (3), wherein the shredder (1) furthermore includes a fan chamber (6) containing a fan (7) which is connected to the shredding chamber (2) via a passage (4), wherein the fan (7) is configured to generate a suction force which will suck the shreds out of the shredding chamber via the passage and will remove these from the fan chamber (6) via a discharge opening (8). In contrast to the known shredders, this shredder (1) no longer has a discharge opening in the shredding chamber and, in addition, no longer requires a calibration grille.

Abstract: The present invention relates to a shredder (1) for comminuting organic material to form shreds, comprising a shredding chamber (2) provided with rotatable cutting means (3), wherein the shredder (1) furthermore comprises a fan chamber (6) containing a fan (7) which is connected to the shredding chamber (2) via a passage (4), wherein the fan (7) is configured to generate a suction force which will suck the shreds out of the shredding chamber via the passage and will remove these from the fan chamber (6) via a discharge opening (8). In contrast to the known shredders, the shredder (1) according to the invention no longer has a discharge opening in the shredding chamber and, in addition, no longer requires a calibration grille.

Abstract: A cutting device for reducing waste material comprises at least two groups of knives mounted on a shaft, next to one another, installed rotatably in front of an anvil. The groups of knives, each operating in a restricted zone of the width of supply each comprises several splitting knives to split the waste material mainly according to the sense of supply of the waste material. Each comprises at least one chopping knife intended to cut the waste material mainly across the sense of supply of the waste material to be cut. The chopping knives of the groups of knives situated next to one another are mounted on the shaft, shifted with respect to one another, so that each of them affects the waste material at a different time and place. A calibrating sieve filters the free discharge of the shreds and contributes to a supplementary (secondary and tertiary) cutting.