Abstract: An herb grinder comprising a receptacle grinding for receiving herbs and an insertable grinding member for being inserted into the receptacle grinding member. The receptacle grinding member comprises a receptacle grinding surface and a peripheral wall structure circumscribing the receptacle grinding surface. The insertable grinding member comprises an insertable grinding surface for rotatably interfacing with the receptacle grinding surface. The grinding surfaces comprise define a respective plurality of elongate grooves forming a respective contiguous protruding structure therebetween. Impartment of a mutual rotational movement of the insertable member within the receptacle grinding member provides for grinding herbs between the interfacing grinding surfaces by the grinding action of the respective contiguous protruding structures thereof.

Abstract: The present invention involves a device and system for grinding herbs, tobacco, leaves and the like. The herb grinder system herein includes a snap together configuration. The lid is provided with magnets positioned around an upper shoulder. These magnets cooperate with secondary magnets positioned around the upper perimeter of the body to hold the lid in place for use, and when not being used for grinding. The bottom portion of the body is provided with a second storage pilot that includes a cup seal. The cup seal is constructed to allow the storage container to be slipped over the pilot and retained in position by friction provided by the cup seal, even when filled with tobacco or the like from the grinder. Removal of the storage container simply requires the user to pull the storage container away from the body.

Abstract: The invention relates to a continuous dry granulation method and non-invasive monitoring and control of the dry granulation method. The invention further describes a dry granulation system and uses thereof. In particular, the non-invasive monitoring methods employ a sound, force, strain, vibration and/or acceleration sensor in order to determine the mechanical strength of a compacted material during a dry granulation process. Further, the compaction parameters of the compacting unit of the granulation process may be controlled to maintain a target mechanical strength of the compacted material.

Abstract: A coffee grinder-doser including a grinder-doser body, an electric motor, at least one driven grinder operatively connected to the electric motor, at least one fixed grinder, operatively separate from the electric motor, the driven and fixed grinders having respective teeth mutually facing and spaced from each other with respect to an adjustment direction X-X, where at least one out of the driven and fixed grinders is movable with respect to the other along the adjustment direction X-X, where the grinder-doser includes an automatic actuator operatively connected by transmission means to the driven grinder and/or fixed grinder so as to adjust and modify the mutual distance between the teeth thereof along the adjustment direction X-X.

Abstract: A method and an plant for separating wax from a dried wax coated plant material, comprising mechanically processing the plant material in a dry process by using an apparatus adapted for deforming at least the outer surface of the plant material, so that the wax coating is cracked and released from the remaining, partly de-waxed, plant material; separating the plant material in a separator into a portion A comprising plant material with a relatively high content of cracked and released wax coating and a relatively low content of the remaining, partly de-waxed, plant material, and a portion B comprising respectively a relatively low content cracked and released wax coating and a relatively high content of the remaining, partly de-waxed, plant material; liquefying the wax contained in portion A, and separating the liquefied wax from the remaining, partly de-waxed, plant material in portion A.

Abstract: Embodiments of the present invention pertain to a modular plant trimming system. A number of plant trimming machines are placed side by side. These plant trimming machines trim leaves from a plant. A sensor detects when one or more of the plant trimming machines are added or removed from the system. A processor then balances a load of plants to be trimmed to be split between the currently available number of plant trimming machines.

Abstract: A premixed photoluminescent composition and related hardened form and method of forming joints for pavers or stones. The premixed photoluminescent composition comprises solid aggregates; a photoluminescent particulate component adapted to emit light when photoexcited; and a binder. When in contact with an activator, oxygen or water, the binder is adapted to harden into a water-resistant binder matrix that bonds the solid aggregates and embeds the photoluminescent particulate component. In use, the water-resistant binder matrix has a transparency allowing transmission of at least a portion of the light emitted by the photoluminescent particulate component.

Abstract: Formulations of tegavivint and related compounds, methods of making such formulations and methods of treating various conditions utilizing such formulations.

Abstract: A mineral extraction system features at least one hydrocyclone, each having input piping, underflow piping, a cyclone portion and overflow piping; a particle size measurement device arranged on some part of the at least one hydrocyclone and configured to sense particles flowing in a process medium, and providing signaling containing information about the size of the particles in the process medium; and a controller having a signal processor configured to receive the signaling, and determine control signaling to control some part of the mineral extraction system, based upon the signaling received.

Abstract: A stirred ball mill including a grinding container, in which an agitator shaft having grinding elements is arranged, whereby a grinding chamber is formed between the grinding container and the agitator shaft, into which chamber the grinding elements extend and into which at least one inlet duct for grinding material opens and in which a dynamic separation device for grinding bodies is provided, the separation device having recesses for feeding back the grinding bodies, and in which the agitator shaft has at least one recess, which widens the separation device and extends in the axial direction into the grinding chamber for improved distribution of the grinding bodies in the grinding chamber.

Abstract: A municipal solid waste recycling facility for producing a solid recovered fuel is provided. The municipal solid waste recycling facility includes a pre-shredding unit and a shredding unit. The pre-shredding unit includes a trommel configured to sort a first stream of solid waste by size into a second stream of solid waste and a third stream of solid waste. The shredding unit includes a primary shredder configured to shred the second stream of solid waste.

Abstract: The present invention provides a disposal with sensor and light system where a sensor detects a presence of a user in one area near the disposal and a light illuminates another area near the disposal.

Abstract: A system includes an enclosure about a path toward a physical damaging system configured for rendering media storage devices inoperable. A scanning system obtains identifying information of a media storage device in the path. A barrier is selectively movable between an accessible state in which media storage device introduction into the enclosure is permitted and a blocking state in which such introduction into the enclosure is prevented. A locking mechanism locks the barrier in the blocking state in response to the barrier being moved to the blocking state. The locking mechanism unlocks the barrier and permits a shift to the accessible state subsequent to the scanning system obtaining the identifying information and subsequent to an action triggered based on the identifying information obtained from the scanning system.

Abstract: A method for comminuting kitchen waste and/or food residues includes receiving kitchen waste and/or food residues in a funnel, a base of which is provided with a grinding unit for comminuting the kitchen waste and/or food residues and which is connected by the grinding unit via a product line to a pump for pumping away comminuted kitchen waste and/or food residues, and pumping away the kitchen waste and/or food residues comminuted by the grinding unit. Prior to the pumping-away step, precomminution of the kitchen waste and/or food residues located in the funnel is carried out in the funnel by means of a precomminution unit projecting into the funnel. A correspondingly designed device for implementing the method is also described.

Abstract: A plant-trimming apparatus comprises two spaced-apart end plates, a rotatable tumbler, a rotatable reel comprising a reel shaft and reel blades, two bearing blocks, each detachably connected to a respective end plate and rotatably supporting a respective end of the reel, a motor arranged to drive the reel and the tumbler, a bed bar assembly comprising a bed bar and a bed knife, the bed knife being in operative engagement with the reel blade for cutting of plant material from the tumbler, and a manually-operated locking mechanism operable to secure the bearing blocks and the bed bar assembly to the end plates. The apparatus can be easily disassembled for cleaning and re-assembled, without using tools.

Abstract: A transmission (1) for a feed and foodstuff roller mill (2) with a plurality of rotatably drivable rollers. The transmission (1) has a bearing housing (3) in which an input shaft (4), a first output shaft (5) and a second output shaft (6) are accommodated. The input shaft (4) and the first output shaft (5) are arranged perpendicular to one another and the first output shaft (5) and the second output shaft (6) are arranged parallel to one another. The input shaft (4) and the first output shaft (5) are operatively connected to one another via a bevel gearwheel pair (7, 7?), and the first output shaft (5) and the second output shaft (6) are operatively connected to one another via a torque transmitting arrangement.

Abstract: In a method for detaching a frozen charge from an inner wall of a grinding tube of a tube mill, a motor of a drive system is operated in a first mode to rotate the grinding tube for grinding. In a second mode, the motor of the drive system is operated to remove the frozen charge from the inner wall of the grinding tube such that operation of the motor to effect a rotational movement of the grinding tube is repeatedly disturbed by a disturbance signal to cause a repeated disturbance within a variable time interval, with the time interval of the repeated disturbance being shortened.

Abstract: In general, the embodiments herein provide non-skid, textured protective coating compositions for vehicle surfaces, such as vehicle beds, rocker panels, inner fenders, tailgates, bedrails, cargo vans, step area, and running boards, and other applicable metal, aluminum, fiberglass, plastic, and wood surfaces, and the method for producing same. In particular, embodiments of the present disclosure relate to textured protective coating compositions having improved impact, abrasion, and chemical resistance. These properties are obtained by a combination of an acrylic resin component and a solvent composition, and optionally a rheology additive component, a texturizing component, an adhesion promoter, and a plasticizer.

Abstract: A bearing block assembly for a plant-trimming machine having a rotatable perforated tumbler, a rotatable reel and a bed bar assembly. The bearing block assembly comprises an outer bearing plate having a bearing-receiving bore for holding a reel bearing to rotatably support an end of the reel, and an inner bearing plate affixed to the outer bearing plate. The inner bearing plate has a pocket for receiving the bearing-receiving bore of the outer bearing plate, the pocket having a tolerance permitting the bearing-receiving bore to be set at a selected position within the pocket. The bearing block assembly has connectors for affixing the outer bearing plate to the inner bearing plate. The bearing block assembly sets the positions of the reel, bed knife and tumbler correctly during assembly of the plant-trimming machine, reducing the time and skill required for maintenance.

Abstract: A mill head for replaceable attachment to a base so as to collectively form a bone mill. The mill head includes shell with: a first opening in which bone stock is introduced into the head; and a second opening through which the bone chips are discharged. A cutting device is mounted in the shell to both rotate and move laterally. Attached to the cutting device are coupling features for engaging a drive spindle able to rotate the cutting device. Also attached to the housing is an alignment feature. The alignment feature engages a complementary alignment feature associated with the drive spindle so as a result of the engagement of the alignment features, the cutting device moves within the shell so that the cutting device coupling features are positioned to engage the drive spindle.

Abstract: An apparatus for trimming plant material includes a rotatable tumbler through which the plant material is to be axially propagated while rotationally tumbling, and a plurality of cutting reel systems adjacent the tumbler. The plurality of cutting reel systems includes a first cutting reel system adjacent the tumbler, and a second cutting reel system adjacent a landing zone of the rotatable tumbler. The landing zone is an angular range about the axis of the tumbler within which plant material tends to land on the tumbler after tumbling through a central volume of the tumbler.

Abstract: An automated coffee machine grinder features two grinding bodies that are rotatable relative to one another about a rotational grinding axis using a driveshaft device as well as an output opening for ground material arranged laterally of the grinding elements. The driveshaft device is positioned divergent from the rotational grinding axis. The output opening and the driveshaft device can be positioned differently relative to one another.

Abstract: A coffee machine including a controller, an infusion cylinder that can be loaded with a ground coffee dose, an ejection piston slidably supported inside the infusion cylinder, a closing piston engageable in the infusion cylinder to create a closed infusion chamber for the ground coffee dose, delimited between a lateral wall of the infusion cylinder, the ejection piston and the closing piston. Electrical actuation moves the infusion cylinder between a lower travel limit stop, where the ground coffee dose is loaded, and an upper travel limit stop where the infusion process occurs, an adjuster for positioning the upper travel limit stop based on the size of the loaded ground coffee dose, so that in the position of the upper travel limit stop, the infusion chamber has a volume sufficient to contain the ground coffee dose without compressing it.

Abstract: An energy storage and regeneration system that converts irregular, non-constant, and variable input power to regular, constant, and controlled output power using hydraulics whereby the irregular input power is used to pump hydraulic fluid into an accumulator array where it is stored pressurized. Energy is released in a controlled fashion using a hydraulic motor operated by the pressurized hydraulic fluid from the accumulator array, in accordance with the specified power demand. One or more power units may be deployed depending on the amount of energy required at the output. Each power unit includes a hydraulic motor and associated floating accumulator whose internal pressure is controlled to maintain a substantially constant pressure differential across its associated motor. The system can be integrated into various energy system sources including renewable energy such as wind, PV or thermal solar, wave, tidal, etc. as well as various types of vehicles such as cars, trucks, motorcycles, trains, boats, etc.

Abstract: An energy storage and regeneration system that converts irregular, non-constant, and variable input power to regular, constant, and controlled output power using hydraulics whereby the irregular input power is used to pump hydraulic fluid into an accumulator array where it is stored pressurized. Energy is released in a controlled fashion using a hydraulic motor operated by the pressurized hydraulic fluid from the accumulator array, in accordance with the specified power demand. One or more power units may be deployed depending on the amount of energy required at the output. Each power unit includes a hydraulic motor and associated floating accumulator whose internal pressure is controlled to maintain a substantially constant pressure differential across its associated motor. The system can be integrated into various energy system sources including renewable energy such as wind, PV or thermal solar, wave, tidal, etc.

Abstract: An energy storage and regeneration system that converts irregular, non-constant, and variable input power to regular, constant, and controlled output power using hydraulics whereby the irregular input power is used to pump hydraulic fluid into an accumulator array where it is stored pressurized. Energy is released in a controlled fashion using a hydraulic motor operated by the pressurized hydraulic fluid from the accumulator array, in accordance with the specified power demand. One or more power units may be deployed depending on the amount of energy required at the output. Each power unit includes a hydraulic motor and associated floating accumulator assembly whose internal pressure is controlled to maintain a substantially constant pressure differential across its associated motor.

Abstract: A portable motorized racking device and system are disclosed for remotely racking (inserting or removing) drawout circuit breakers. The racking device provides a portable, motorized device that can be hand carried to a work location and affixed to the circuit breaker without the need of any modification to the breaker or its enclosure. In one embodiment, among others, the torque that is required to operate the breaker racking mechanism is provided by an electrically powered gearmotor. Attached to the output shaft of the gearmotor is a socket that engages the circuit breaker racking screw. An anti-rotation plate engages a feature, such as a bolt head, opening, hole, or edge, on the racking screw support frame or the breaker face to prevent the gearmotor from rotating while the socket rotates the racking screw.

Abstract: A gyratory crusher and system for determining a close-side setting or an open-side setting is provided including a point cloud generator mounted proximate the crusher; a drone; a laser emitter mounted on the drone to mark the first trace on the mantle at a predetermined position of the gap; a camera mounted on the drone to capture a series of image of the first trace as the mantle of the gyratory crusher rotates; and a computer in communication with the camera, the point cloud generator and the drone, the computer comprising a memory and a processor, the memory providing instructions to process the image to provide a gap width and to determine at least one of a close-side setting or an open-side setting from the gap width.

Abstract: A method for drive control of a vertical roller mill having a grinding table rotatable about a vertical axis includes driving the grinding table with a drive train comprising an electric motor and a gearbox with a rotation speed; monitoring a profile of a measured value derived from vibration-relevant measured values to detect a predefined pattern in the profile; and when the predefined pattern is detected, automatically increasing or reducing the rotation speed of the grinding table by a predefined adjustment value. A corresponding drive system operating according to the method is also disclosed.

Abstract: A tank apparatus and a system for dispersing by circulating a mixture that prevents powdery additives from adhering to an inner face of a tank from scattering in the tank, from drifting on the surface of a liquid, and from agglutinating, are presented. The tank apparatus that stores a raw material that is slurry or liquid and supplies powdery additives to the raw material to mix them with the raw material comprises a tank for storing the raw material and a screw-type device for supplying powdery additives that is integral with the tank and supplies the powdery additives to the raw material in the tank, wherein a tip of a part for supplying powdery additives of the screw-type device for supplying powdery additives is inserted into the mixture in the tank.

Abstract: A method for producing basic products from ash, which includes the provision of a starting material in particle form, crushing the particles of the starting material by high-frequency pressure impulses and the in situ separation of at least two fractions with different average particle sizes, where the energy-efficient production of a basic product with a defined particle size and high reactivity is effected, such that the produced basic products can be used directly for further product production, e.g. as alkalizing agent, for ground stabilization or as filler.

Abstract: A coffee beans grinder includes a main body, a dispensing component, a blade unit for grinding coffee beans having a first blade element and a second blade element facing the first blade element, and a dispensing element provided in the dispensing component for feeding coffee beans to a grinding space defined between the first blade element and the second blade element. The first blade element is provided in the main body, and the second blade element is provided in the dispensing component. The dispensing component is removably attached to the main body with a manually-operable engagement element. The second blade element faces the first blade element to define the grinding space therebetween with the dispensing component being attached to the main body with the manually-operable engagement element.

Abstract: An improved portable essence extractor and liquid container combination is provided in which an essence extractor having a muddling assembly that is removably connected to, and in continuous fluid communication with, a liquid dispensing container. The essence extractor and muddling assembly comprises a handle and a muddling mechanism. The muddling assembly is designed to act as a lid or be incorporated into the lid of the container providing a leak proof and compact container. The muddling assembly further has a separating mechanism limiting the intrusion of pulp or solids into the user's drink. The muddling assembly further provides for extension or retraction with a mechanical linearly adjustment mechanism. The muddling assembly therein forms the lid or is integrated with a lid of the container.

Abstract: An improved gyratory crusher is provided. The gyratory crusher comprises an eccentrically rotating mantle lined with a mantle liner, a concave lined with a concave liner, the concave housing the mantle to provide a crusher chamber, and the crusher chamber having a gap. The improvement is a system for determining a close-side setting for the gyratory crusher based on the gap width. The system includes a cross hair laser emitting a first trace and a second trace, the laser mounted to mark the first trace on the mantle liner and to mark a second trace traversing the gap and at least intersecting the concave liner at a preselected position of the gap, a camera mounted to capture an image of the first and second trace, and a computer in communication with the camera, the computer comprising a memory and a processor, the memory providing instructions to the processor to process the image to provide a gap width and to calculate a close-side setting.

Abstract: Process of press-granulating non-ductile salts and salt mixtures, such as kieserite (MgSO4·H2O), langbeinite (K2SO4·2MgSO4), polyhalide (K2SO4·MgSO4·2CaSO4·2H2O), arcanite (K2SO4) and anhydrite (CaSO4) for preparing stable, storable granulate, by pressing a mixture of fine grains of salt and a viscous, sugar-containing additive, such as molasses having a total sugar content in the dry matter of from 47 to 55%, by roller pressing at pressures up to 260 bar. The press scraps initially obtained, which are ductile, are solidified by maturing of the material at temperatures between 20 and 40° C. and maturing times of 3 to 8 hours prior to crushing them in impact mills and sieving.

Abstract: A method and system allowing the ability to automatically and systematically run thousands and even millions of combinations and permutations of regression, forecasting and econometric trials to determine the best-fitting predictive model.

Abstract: A system and method are disclosed for observing a change of mass inside a grinding unit as a part of a grinding process with a storing unit. The change of mass is derived from a mass balance for the grinding unit and a mass balance for the storing unit.

Abstract: A drive system for a ball mill includes a motor with a slip-ring rotor. The motor is assigned a family of characteristics relating the torque of the motor to a further characteristic variable. The family of characteristics has at least two different characteristics, and it includes a switching element that switches over the drive system abruptly between the two characteristics when there is a constant value of the characteristic variable. In a method for operating a ball mill with a drive system, a drum of the ball mill is moved out of a state of rest when the first characteristic is activated. In the event of caking in the drum of the ball mill, the drum is moved until the caking is in an inclined position. Actuation of the switching element brings about switching over to the second characteristic.

Abstract: A refrigerator is provided including an ice making assembly. The ice making assembly includes a storage container that has a discharge zone including a crushing assembly for selectively crushing formed ice before dispensing the ice through the dispenser of the refrigerator. The crushing assembly includes both rotating and fixed crushing blades, and including crushing teeth for crushing the formed ice cubes therebetween. A diverter wedge may be positioned at or formed integrally with the fixed crushing blades such that the diverter wedge closes any gap between the rotating blades and the wall of the discharge zone. The diverter wedge can include a sloped portion to move any smaller or differently-shaped cubes from the outer edge of the discharge zone to between the crushing blades such that it is ensured that the cubes are crushed before being dispensed.

Abstract: A system for generating a control signal comprises a data propagator (9) for propagating acoustic sensor array data relating to a set of acoustic measurements at a set of sensor positions covering an aperture towards a set of propagated positions to obtain propagated data relating to the set of propagated positions. A control signal generator (2) is arranged for generating a control signal based on the propagated data. The control signal generator (2) comprises a data analyzer (1) for analyzing the propagated data in a spatial frequency domain. The data propagator (9) is arranged for propagating the sensor array data in real-time and the control signal generator (2) is arranged for generating the control signal in real-time.

Abstract: A document shredder with a motor, a cutting unit, and a motor control, wherein the motor control may start, stop and reverse the motor. The motor control may limit the maximally allowed load of the motor to a predetermined load limit value. In case the motor reaches the maximally allowed load limit value, the load limit value may be increased for a predetermined time, either manually or automatically. In this way a short overload does not lead to a paper jam and the shredder does not have to be reversed, which may cause a paper mess in the workplace. The motor may be a direct current motor and/or a series motor, so that the load limit value may be defined by a maximally allowable motor current.

Abstract: A method is provided to separate an eggshell membrane from the outer shell of an egg. The method includes first adjusting the moisture content of an eggshell which includes a shell and a membrane. The eggshell is then subjected to airflow, such that the shell is broken and detaches from the membrane resulting in shell particles and membrane fragments. The shell particles and membrane fragments may be further dried and separated. The membrane fragments may then be processed. In some embodiments, the moisture content is adjusted to less than 24% such as by drying the eggshell. The eggshell may be pulverized resulting in shell powder or dust. The membrane fragments may be further processed for storage, transport, or the final application of same, such as by drying, grinding, and/or freezing.

Abstract: A shredder includes a shredding mechanism and a vibration sensor configured to detect vibrations generated by the shredding mechanism. The shredder includes a controller configured to regulate operation of the shredder's motor in response to the detected vibrations. The controller may regulate operation of the shredder so as to keep the detected vibrations below a predetermined vibration level during operation of the shredder. The controller may modify operation of the shredder (e.g., turn the shredder off, conduct an autocorrect sequence, increase or decrease the shredder's speed, display an error message) in response to the detected vibrations having a predetermined characteristic (e.g., frequency and/or amplitude within a predetermined range, a characteristic that indicates a material/paper jam or misfeed).

Abstract: The present invention provides a system and method for recovering a precious metal from a geologic material. The system and method may include combining a geologic material containing a precious metal present in a non-bulk state with a first stage flux composition. The combination may be milled to provide a first stage mixture. The first stage mixture may be sintered for a first period of time at a first temperature and a second period of time at a second temperature. The second temperature may be greater than the first temperature. Sintering may promote the transition of a portion of the precious metal from a non-bulk state to a bulk state. A first stage sintered material may be recovered with a content of at least about 0.15 weight percent of the precious metal in the bulk state.

Abstract: A process for treating fly ash to activate the fly ash so that it may be used as a substitute for Portland cement, with the process including the use of a specialized rotary mill having variably sized and shaped media to increase the surface area of one fly ash component by grinding, avoiding milling a second fly ash component, while roughing up the surface of the second component to increase its surface area.

Abstract: A transmission for shredding machines includes a drive shaft, a driven shaft, and an intermediate shaft, with at least two spur gears each, at least one hydraulic shift clutch each, and at least one overload clutch. The shafts can releasably be coupled with each other via the spur gears and the hydraulic shift clutches, and the driven shaft can releasably be coupled with an output shaft by way of the overload clutch.

Abstract: An apparatus and method is provided for organic material reduction and preparation for subsequent recycling or disposal in a self-contained system which is safe for equipment operators, and highly cost and floor-space efficient. The apparatus includes a preferably-shaped hopper for receiving organic materials to the reduced, preferably a floating auger, a solids pump and a macerator. The system preferably generates a processed organic material discharge with a particle size on the order of ?? without concern as to the liquid content of the incoming organic material. The apparatus may be operated by a method which is completely automated following operator initiation, including automatically attempting self-clearing actions in the event of detecting clogs or jams in the processing components.

Abstract: This driving device for a grinder includes a toothed ring, at least two driving assemblies for the toothed ring. Each driving assembly includes an electric motor and a reduction gear unit. The driving device includes safety means suitable for preventing the starting of all the driving assemblies when at least one driving assembly is unavailable.

Abstract: A process for energy recovery and transfer including: warming fresh air in a heat recovery and pressure control unit; feeding waste feed and the warm fresh air into a processor; reducing a moisture content of the waste feed by breaking the waste feed into a fuel powder in the warm fresh air in the processor; filtering contaminated air through an initial filter to remove the fuel powder from the contaminated air; pre-heating the contaminated air in the heat recovery and pressure control unit; raising the temperature of the pre-heated contaminated air in a chamber; passing the chamber discharge air through the heat recovery and pressure control unit to pre-heat contaminated air passing on to the chamber and to warm fresh air passing on to the processor; and filtering terminal air through a terminal filter to remove particles from the terminal air.

Abstract: 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.