A comminution device comprises a plurality of first cutting elements having first serrated cutting edges disposed on a first circular path; a second cutting element having a second serrated cutting edge corresponding to the first serrated cutting edges for cutting through cutting material, the second cutting element being displaceable about an axis of rotation on a second circular path concentric with the first circular path. The second serrated cutting edge comprises a plurality of jags and each jag comprises a radially inner flank and a radially outer flank, each at an angle to the axis of rotation. A drive rotationally drives the second cutting element about the axis of rotation and an adjustment mechanism by which the plurality of first cutting elements and the second cutting element are displaceable relative to each other axially in the direction of the axis of rotation, that a cutting gap between them is adjustable.

A comminution device comprises a plurality of first cutting elements having first serrated cutting edges disposed on a first circular path; a second cutting element having a second serrated cutting edge corresponding to the first serrated cutting edges for cutting through cutting material, the second cutting element being displaceable about an axis of rotation on a second circular path concentric with the first circular path. The second serrated cutting edge comprises a plurality of jags and each jag comprises a radially inner flank and a radially outer flank, each at an angle to the axis of rotation. A drive rotationally drives the second cutting element about the axis of rotation and an adjustment mechanism by which the plurality of first cutting elements and the second cutting element are displaceable relative to each other axially in the direction of the axis of rotation, that a cutting gap between them is adjustable.

A stirring apparatus includes a shredder that shreds a sheet; a case that accommodates a sheet piece shredded by the shredder and has a bottom surface and an inner surface; and a rotator that is disposed at the bottom surface of the case and includes a blade which stirs the sheet piece by rotation, in which L1<L3<L2, when between an outer end of the blade and the inner surface in a radial direction of the rotator, a shortest distance in the radial direction is defined as L1, a longest distance in the radial direction is defined as L2, and an average major axis length of the sheet piece is defined as L3.

A stirring apparatus includes a shredder that shreds a sheet; a case that accommodates a sheet piece shredded by the shredder and has a bottom surface and an inner surface; and a rotator that is disposed at the bottom surface of the case and includes a blade which stirs the sheet piece by rotation, in which L1<L3<L2, when between an outer end of the blade and the inner surface in a radial direction of the rotator, a shortest distance in the radial direction is defined as L1, a longest distance in the radial direction is defined as L2, and an average major axis length of the sheet piece is defined as L3.

A shredder includes a housing having a throat for receiving at least one article to be shredded, and a shredder mechanism received in the housing and including an electrically powered motor and cutter elements. The shredder also includes a detector that is configured to detect a thickness of the at least one article being received by the throat, and a controller that is configured to operate the motor to drive the cutter elements to shred the at least one article and to set a flutter threshold higher than the predetermined maximum thickness threshold, if the detected thickness is less than a predetermined maximum thickness threshold. The controller is also configured to thereafter continuously detect the thickness of the at least one article being inserted into a throat of the shredder; and to perform a predetermined operation responsive to the thickness detector detecting that the thickness of the at least one article is greater than the flutter threshold.

A shredder includes a housing having a throat for receiving at least one article to be shredded, and a shredder mechanism received in the housing and including an electrically powered motor and cutter elements. The shredder also includes a detector that is configured to detect a thickness of the at least one article being received by the throat, and a controller that is configured to operate the motor to drive the cutter elements to shred the at least one article and to set a flutter threshold higher than the predetermined maximum thickness threshold, if the detected thickness is less than a predetermined maximum thickness threshold. The controller is also configured to thereafter continuously detect the thickness of the at least one article being inserted into a throat of the shredder; and to perform a predetermined operation responsive to the thickness detector detecting that the thickness of the at least one article is greater than the flutter threshold.

A disintegrating machine, in particular a rotor cutter or rotor tearing device, contains at least a first blade shaft, a second blade shaft, a frame, and a driving device for driving the blade shafts. The blade shafts are rotatably accommodated by bearings in bearing receptacles of the frame. The bearing receptacles are configured to improve the maintenance friendliness, in particular by a maintenance-friendly bearing receptacle and/or quick-exchange coupling and/or quickly removable scrapers and/or multifunctional bearing plates and/or by reinforcing ribs, and with regard to a lighter construction while achieving the same or better stability properties.

A disintegrating machine, in particular a rotor cutter or rotor tearing device, contains at least a first blade shaft, a second blade shaft, a frame, and a driving device for driving the blade shafts. The blade shafts are rotatably accommodated by bearings in bearing receptacles of the frame. The bearing receptacles are configured to improve the maintenance friendliness, in particular by a maintenance-friendly bearing receptacle and/or quick-exchange coupling and/or quickly removable scrapers and/or multifunctional bearing plates and/or by reinforcing ribs, and with regard to a lighter construction while achieving the same or better stability properties.

The present invention has an object to provide a shredding device which can efficiently shred the bagged garbage discharged from homes or business offices. The shredding device in accordance with the present invention includes a housing, a rotary shaft rotatably attached to an inside of the housing, a plurality of rotary blades attached around the rotary shaft to be spaced apart from one another in an axial direction of the rotary shaft, and a fixed blade attached to a bottom plate of the housing so that an article to be processed is shredded between the fixed blade and the rotary blades, wherein a lifting device which changes a distance between a tip of the rotary blade and a tip of the fixed blade by raising and lowering the rotary shaft is provided.

A electronic grinder includes a main body and a grinding and dispensing chamber. The top of the main body open but covered by a cap. The main chamber includes a motor connected to a magnetically attached removable blade and propeller. The blade and propeller extend into the chamber when the grinder is assembled. When the cap is closed, the blade and propeller grinds material placed in the chamber and pull air down toward the blade and propeller. When the cap is opened, the blade and propeller function as a fan to generate airflow toward the top of the chamber to dispense ground material out of the chamber. The grinder can also include a microcontroller, a communications device, an infrared volume sensor, a scale, an audible buzzer, a vibration buzzer, and one or more sanitizing LED lights.