A system for comminuting solid waste material including a casing defining a comminution chamber having two side walls and adapted for connection in a solid waste disposal channel. The system includes a first shredding device and a second shredding device disposed along a line extending perpendicular to a flow direction in the channel to faun a pair of interactive shredding members. A rotating screening drum disposed within the casing upstream of the first and second shredding devices and positioned between the first and second shredding devices, the rotating screening drum configured to permit fluid to pass therethrough and to move solids toward one of the shredding devices. The rotating screening drum is configured to rotate clockwise and counter clockwise to alternately distribute solids captured thereon to one of the first and second shredding devices.

A preload type granulator includes a drive unit, a transmission unit including a transmission sleeve rotatable by the drive unit and having displacement slots cut through the peripheral wall thereof, a first coil spring and a second coil spring with different spring coefficients connected in series and axially mounted in an installation space in the transmission sleeve, and a cutting unit including a connecting shaft fastened to the transmission sleeve by screw bolts respectively inserted through the displacement slots and threaded into the connecting shaft, a cutter holder mounted on the connecting shaft and a plurality of cutting tools mounted on cutter holder. Thus, the spring coefficient adjustment module is used to adjust the spring coefficients of the first coil spring and the second coil spring, so that the preload stroke of the cutting unit is adjusted to control the friction between the cutting tools and the die face.

A waste treatment machine is disclosed, having a safety sensor which generates an alarm signal to stop the motor (7) when the requested torque exceeds a certain threshold, but has a gear with a friction transmission belt (8), i.e. not a toothed belt, between a driving pulley (9) and an idle pulley (10) connected to a shaft (6) for squeezing/grinding waste. The friction transmission belt is tightened so as to slip when a nominal maximum torque is exceeded. The protection sensor is configured to detect slippage of the friction transmission belt and to provide in such an event an alarm signal to a control unit that interrupts a normal miming of the motor. The organic waste treatment machine may be a single-worm screw (4) or double-worm screw squeezing machine, or a grinding machine with hammers (13) pivoted at the periphery of a shaft installed in the inner chamber of the machine. A method of controlling such a machine for treating waste is also disclosed.

A shredder includes a shredder box having first and second opposite end walls, and first and second opposite side walls that extend between the first and second end walls. The shredder further includes a shredder rotor positioned within an interior of the shredder box, an access door that is pivotally moveable, and a control system for monitoring various parameters to operate the shredder. A side access region is defined between the first and second end walls when the access door is in the open position. The side access region provides access to the shredder rotor and includes an open region defined between the first and second end walls at the second side of the shredder. The open region has an open top which is free of obstructions extending between the first and second end walls.

A defibrating device and sheet manufacturing apparatus attract and remove metal fragments when metal fragments are mixed with fibrous material. A defibrating device has a main unit with a defibration section configured to defibrate fibrous material, and a swirl section configured to produce a rotational current, and by the rotational current cause the fibrous material to rotate and flow into the defibration section. The main unit has a magnet unit that is disposed to the swirl section, and has a magnet that attracts by magnetic force metal fragments conveyed with the fibrous material to the swirl section.

A paper shredder has a paper tray, a paper inlet, a shredder cover, a paper pressing plate, paper pick-up rollers, a shredder cutter shaft, a motor, a wastepaper barrel, and a paper limiter. The paper tray carries a stack of to-be-shredded paper. The paper inlet guides to-be-shredded paper. The shredder cover end is connected to the shredder body by a rotary shaft, closing or opening the shredder body. The paper pressing pl presses the stack in the paper tray. The paper pick-up rollers are on one side of the paper inlet, feeding the paper tray stack into the paper inlet. The shredder cutter shaft shreds the to-be-shredded paper. The motor drives the shredder cutter shaft to operate. The wastepaper barrel is located below the paper inlet to collect shredded paper. The paper limiter is limits one of a thickness or a length of the stack placed in the paper tray.

A electronic grinder includes a main body removably attached to a grinding and dispensing chamber. The top of the main body is sealed by an upper cab and the bottom of the chamber is sealed by an openable lower cap. The main chamber includes a motor connected to a magnetically attached removable blade. The blade extends into the chamber when the grinder is assembled. When the lower cap is closed, the blade grinds material placed in the chamber. When the lower cap is opened, the blade functions as a fan to dispense ground material out of the chamber. The grinder also includes a display, an electronic scale, and an accessory cigarette lighter.

A food waste disposer includes a food conveying section, a grind and discharge section and a motor section used for driving the grind and discharge section to execute a grinding process. The motor section includes a universal motor, the universal motor includes a control device for controlling the output of the universal motor, and the control device includes a rectifier bridge circuit module for converting an AC power signal into a DC power signal.

A garbage disposal for saving space under a sink. The garbage disposal is a small, compact garbage disposal that takes less space under a sink. The garbage disposal further has a compact electric motor for conserving energy. The garbage disposal has a universal adaptor coupled to a drain in the sink. The universal adaptor is coupled to a receiving pipe for receiving waste and water. The receiving pipe has a plurality of magnets that are for removing metal from the waste. The garbage disposal has a garbage grinder coupled to the receiving pipe, where the waste is ground by one or more grinding steel blades. The garbage disposal has a motor that is communicatively coupled to grinding steel blades by a power transfer shaft.

A small-form-factor high-security destruction machine for optical media has a weight empty of about 16.3 lbs and holds about 5 lbs of residue.