A paper shredder includes a housing, cutters positioned in the housing, and a feeder base adapted to support a stack of paper. The feeder base includes a feeder slot. The feeder base is integrally-formed as one piece having a front portion, a rear portion, and a sidewall along first and second sides and spanning the feeder slot.

A paper shredder includes a housing, cutters positioned in the housing, and a feeder base adapted to support a stack of paper. The feeder base includes a feeder slot. The feeder base is integrally-formed as one piece having a front portion, a rear portion, and a sidewall along first and second sides and spanning the feeder slot.

A hopper and a mineral material processing plant. The hopper includes hinged side walls configured to be pivoted into a first position and a second position and a connection wall attached between the hinged side walls. The connection wall includes a flexible member and is configured to fold together in response to the hinged side walls being pivoted from the first position to the second position.

A hopper and a mineral material processing plant. The hopper includes hinged side walls configured to be pivoted into a first position and a second position and a connection wall attached between the hinged side walls. The connection wall includes a flexible member and is configured to fold together in response to the hinged side walls being pivoted from the first position to the second position.

A mobile bulk material processing apparatus having at least one material processing unit that is mounted at a hanging assembly including a carrier frame suspended from a main frame of the apparatus. The hanging assembly is capable of being connected or disconnected from the mainframe of the machine via a semi-automated process using a plurality of powered actuators acting on first and/or second couplings.

A mobile bulk material processing apparatus having at least one material processing unit that is mounted at a hanging assembly including a carrier frame suspended from a main frame of the apparatus. The hanging assembly is capable of being connected or disconnected from the mainframe of the machine via a semi-automated process using a plurality of powered actuators acting on first and/or second couplings.

A grinding installation for comminuting material may include a grinding apparatus and a classifying device that is connected to the grinding apparatus and classifies the material. The classifying device may include a static classifier and a dynamic classifier. The static classifier may be disposed so as to at least partially surround the dynamic classifier. The classifying device may comprise a coarse material outlet for discharging coarse material that comprises a coarse grain fraction, a grit outlet for discharging grit that comprises a medium grain fraction, and a finished material outlet for discharging finished material that comprises a fine grain fraction. The grinding installation may further include an open-loop/closed-loop control device for open-loop/closed-loop control of at least a part of a stream of material to the grinding apparatus. The present disclosure also concerns methods for comminuting material.

A grinding installation for comminuting material may include a grinding apparatus and a classifying device that is connected to the grinding apparatus and classifies the material. The classifying device may include a static classifier and a dynamic classifier. The static classifier may be disposed so as to at least partially surround the dynamic classifier. The classifying device may comprise a coarse material outlet for discharging coarse material that comprises a coarse grain fraction, a grit outlet for discharging grit that comprises a medium grain fraction, and a finished material outlet for discharging finished material that comprises a fine grain fraction. The grinding installation may further include an open-loop/closed-loop control device for open-loop/closed-loop control of at least a part of a stream of material to the grinding apparatus. The present disclosure also concerns methods for comminuting material.

A waste processing machine for reducing material and having a feed assist system. A cutting assembly on a frame reduces material. A feed system on the frame directs material toward the cutting assembly. A winch assembly includes a line with a line end for securing material, and a driver on the frame to urge the line end toward the driver. A keeper fixed to the frame secures the line end. A sensor detects utilization between: a docked configuration with the line tensioned against between the driver and the keeper; and an undocked configuration with the line loosened. A control unit allows operation of the feed system in the docked configuration, and interrupts the feed system in the undocked configuration. A feed mechanism actuation bypasses the interrupted operation to advance material for a bypass period, and a limit mechanism overrides operation of the feed mechanism for a subsequent limit period.

A waste processing machine for reducing material and having a feed assist system. A cutting assembly on a frame reduces material. A feed system on the frame directs material toward the cutting assembly. A winch assembly includes a line with a line end for securing material, and a driver on the frame to urge the line end toward the driver. A keeper fixed to the frame secures the line end. A sensor detects utilization between: a docked configuration with the line tensioned against between the driver and the keeper; and an undocked configuration with the line loosened. A control unit allows operation of the feed system in the docked configuration, and interrupts the feed system in the undocked configuration. A feed mechanism actuation bypasses the interrupted operation to advance material for a bypass period, and a limit mechanism overrides operation of the feed mechanism for a subsequent limit period.