Abstract: A shaft shredder having a machine frame and a shredding unit. The shredding unit has at least one shredding shaft that is mounted therein and is driven by a drive. A material feeding region is formed adjacently to the shredding unit and has a plurality of side walls. At least one of the side walls that is arranged on the end face with respect to the axial direction of the shredding shaft is formed such that it can be moved from a use position into a maintenance position.

Abstract: A coarse crushing device including a rotary cutter portion tearing off a fiber-containing sheet in a first direction, a roller portion pinching the fiber-containing sheet, and a tearing portion provided between the rotary cutter portion and the roller portion, and having a plurality of blades tearing off the fiber-containing sheet in a second direction intersecting the first direction, in which the rotary cutter portion includes a first rotating shaft member rotating about a first axis, a second rotating shaft member rotating reversely to the first rotating shaft member about a second axis parallel to the first axis, a plurality of first rotary cutters provided on the first rotating shaft member and rotating together with the first rotating shaft member, and a plurality of second rotary cutters provided on the second rotating shaft member and rotating together with the second rotating shaft member, and the first rotary cutter and the second rotary cutter are separated from each other.

Abstract: The paper shredder simultaneously shreds both manually inserted sheets of paper and sheets of paper that are placed in an auto-feeder input tray. Immediately above the shredding mechanism the input path is bifurcated. One branch extends essentially straight up from the blades and leads to a manual input slot. A second branch extends at an angle towards the rear of the shredder where an auto-feed roller lies at the bottom of an auto-feed slot. When a stack of paper is placed into the slot, the bottom of the stack rests against the auto-feed roller which grasps the top sheet and pulls it under the roller. The roller then pushes the sheet down the angled throat where a curved surface bends the sheet downwards and into the shredding mechanism.

Abstract: A shredding device is provided comprising two shredding shafts arranged parallel to each other with shredding elements arranged thereon, wherein the shredding shafts are preferably rotatable mechanically synchronized to each other. A shaft-side coupling element is connected to a respective first end of the shredding shafts. The shredding device includes a housing with a housing-side coupling element is provided that can be coupled to the shaft-side coupling element. The shredding device includes a displacement device enabling displacement of the shredding shafts for decoupling and coupling the shaft-side coupling element from or to the housing-side coupling element.

Abstract: Various embodiments of a tissue cutting device are described, such as a device with an elongate tube having a proximal end and a distal end and a central axis extending from the proximal end to the distal end; a first annular element at the distal end of the elongate tube, the first annular element having a flat portion at its distal end perpendicular to the central axis; and a second annular element at the distal end of the elongate tube and concentric with the first annular element, the second annular element having a flat portion at its distal end perpendicular to the central axis, at least one of the first or second annular elements rotatable about the central axis, the rotation causing the first annular element and the second annular element to pass each other to shear tissue.

Abstract: An apparatus for comminuting solid waste material including a casing defining a comminution chamber and being open on opposite sides thereof for permitting the flow of liquid therethrough. The apparatus including cooperating substantially parallel first and second shafts, each including a plurality of cutting elements mounted on said first shaft in interspaced relationship with a plurality of second cutting elements mounted on said second shaft, each of said cutting elements having at least one cutting tooth thereon, said cutting elements being positioned between and separated in an axial direction by spacers which are coplanar with the cutting elements of the adjacent stack such that a cutting element from one stack and a spacer from the other stack form a pair of interactive shredding members, wherein the spacers have a textured or scalloped outer cylindrical surface.

Abstract: A machine is provided including a shredder formed by at least two parallel series of contrarotating knives, alternating with counter-knives. The knives are carried by shafts and the edge of each counter-knife facing the opposite knife associated thereto has an arcuate portion. At least one counter-knife has a portion extending above the axis of the shaft and forming an arcuate edge centered on the axis of the other shaft of the shredder, this arcuate edge completing the arcuate portion. The arcuate portion has a notch formed on it, opening into the arcuate edge formed by this arcuate portion, and forming a tip oriented toward the upstream side of the counter-knife.

Abstract: A crushing machine construction kit for the construction of a crushing machine contains a drive device and a frame of a crushing device. The crushing machine construction kit further contains at least two shear shafts and at least two shredder shafts for the selective configuration of the crushing machine as a rotary shear or as a rotary shredder. A method converts the rotary shredder into the rotary shear.

Abstract: A method for slitting sheet material having a thickness, a width, a leading edge and a shear strength. The slitter has rotatable arbors and knives on each arbor that rotate about their axes and are held adjacent to each other. A computer is used to calculate a first and second spacing for the arbors based on the shear strength, outer diameter, and thickness of the material. The material is inserted between the knives and the leading edge passes through the slitter with the arbors the first position that pinches the material between outer diameters of opposing knives as it moves forward. While the material moves forward the arbors are moved into a second and closer position in which the knives are situated to slit the material as it passes between the knives. This slitting of material behind the leading edge creates a leading tab holding the slit strips together.

Abstract: An industrial shredder is described that includes one or more electric motors controlled by a variable frequency drive. One or more fixed displacement hydraulic pumps are powered by the one or more electric motors and hydraulically coupled to one or more hydraulic motors in a closed loop configuration. Hydraulic pressure in the closed loop is substantially similar on a first side of the one or more hydraulic motors and on a second side of one or more hydraulic motors. One or more cutting shafts are coupled to the one or more hydraulic motors such that the hydraulic motors cause the cutting shafts to rotate.

Abstract: A size reduction device and method for solid particles, which are conveyed as a suspension in a liquid flow. The device includes a housing, at least two counter-rotatable size reduction components disposed in the housing, each including a plurality of cutting elements, disposed on a common rotatable shaft with a longitudinal axis. The flow direction of the suspension is at right angles to the longitudinal axes of the shafts of the size reduction components. Two mutually opposite guide rails with a longitudinal axis parallel to the shafts are assigned to components. Each guide rail includes a base plate, on which ribs with channels are constituted parallel to the flow direction on the side of the base plate towards the component.

Abstract: Apparatus for mulching organic matter such as brush and trees are disclosed. The apparatus have cutting teeth that include cladding for increasing the wear-resistance of the teeth. Cutting heads and vehicles that incorporate such teeth are also disclosed.

Abstract: A machining method of a shredding cutter includes providing a cutter shaft and a plurality of blades; arranging the plurality of blades on the cutter shaft in a predetermined spacing; and rolling or extruding intervals of the cutter shaft between the blades to shift some materials thereof from middle toward both sides and squeeze the materials onto flanks of the blades to form embossed parts so that the blades are embedded in the embossed parts and clamped by the embossed parts, thereby fixing the blades onto the cutter shaft. The shredding cutter has a strong unitary structure, high precision, high yield, which is beneficial to reduce the processing cost and the cost of materials.

Abstract: A shredder has cutter elements for destroying articles (paper) and a feed mechanism for advancing paper from a stack in a tray into cutters for shredding. The feed mechanism has a feed member provided adjacent to the tray with an elastic arm for engaging and disengaging the stack. The feed member rotates in a feeding direction about an axle, with the elastic arm elastically deforming to apply pressure to feed paper atop the stack to the cutters. The elastic arm can include a protruding tip that is inserted into the stack. The tray includes a curved feed bed to assist in feeding paper into the cutters and deforming the elastic arm. A pivot arm can also move the feed member relative to the tray (e.g., vertically). A disengagement mechanism can hold the feed mechanism in an inoperable feeding position when a drawer or tray is moved into an open position.

Abstract: A device (1) for opening bags in mixtures of wastes has a first group of tearing elements (2) for transferring tearing forces to bags and a second group of tearing elements (2) for transferring tearing forces to bags. A drive power can move the groups of the tearing elements (2) in such a manner that relative movement between tearing elements (2) of different groups can generate tearing forces. The device has a drive control device configured to control the drive power of at least one group of tearing elements (2) as a function of the operating situation.

Abstract: A shredder mechanism is disclosed herein including first and second shredder portions positioned opposite one another and defining a slot therebetween. The first and second shredder portions each include a longitudinal support having more upper fins and a plurality of lower fins. each defining a shaft receptacle. A shaft is positioned between the upper and lower fins positioned within the shaft receptacles. A plurality of cutting blades are mounted to the shaft and extend into the slot. Each of the one or more upper fins and the plurality of lower fins extend among the plurality of cutting blades. The longitudinal support includes upper and lower support portions having the one or more upper fins secured to the upper support portion and the plurality of lower fins secured to the lower support portion.

Abstract: A rechopper for chopped crop includes first and second rollers having axially parallel rotational axes, peripheral surfaces disposed opposite one another delimiting a comminution gap and truncated-cone shaped sections. The truncated cone-shaped sections have a base surface (G, G?), a top surface (D, D?) and peripheral surfaces extending at a slant relative to the rotational axis of the respective roller. The base surface (G, G?) and the top surface (D; D;) disposed on the first roller and the second roller have diameters that vary in an alternating manner as viewed in an axial direction (R).

Abstract: Medical devices for shearing tissue into small pieces are provided. One exemplary device includes oppositely rotating first and second rotatable members, each located at least partially within a distal housing. The device also includes first and second circular axle portions, and first and second blades that are directly adjacent to one another and positioned to partially overlap such that tissue may be sheared between the first and second blades, between the first blade and the second axle portion and between the second blade and the first axle portion. The rotatable members are configured to engage tissue from a target tissue site with teeth of the first and second blades, rotate towards one another and inwardly to direct tissue from the target tissue site through a tissue engaging opening and into an interior portion of the distal housing. Methods of fabricating and using the above device are also disclosed.

Abstract: A roller shell for a conditioning roller has grooves extending in the axial direction and grooves extending in the circumferential direction. The grooves extending in the axial direction are deeper than the grooves extending in the circumferential direction.

Abstract: An automatic feed paper shredder with an improved paper pressing mechanism, including a paper shredding device, openable flip covers and elastic supports, wherein one side of the flip cover is hinged to the paper shredding device; the flip cover are disposed above the paper shredding device; a paper placing platform and a paper inlet opening are disposed on the top of the paper shredding device; automatic paper winders are disposed at both sides of the paper inlet opening; a pressboard is disposed at the bottom of each flip cover; and one side of each elastic support is connected with the flip cover and the other side of each elastic support is connected with the flip cover and the other side of each elastic support is connected with the pressboard.

Abstract: An improved scraper plate assembly is provided on a comminuting device having compliant rounded edges, sloped walls, and reduced height for placement along recycle flow paths within a comminuting apparatus when circulating subdivided waste material from between a pair of scissor rolls for further delivery to a scissor roll for further movement and subdividing of the subdivided waste material. A comminuting apparatus is also provided.

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: A machine for distributing blowing wool from a bag of compressed blowing wool is provided. The machine includes a chute having an inlet end configured to receive the bag of compressed blowing wool. A shredding chamber is positioned downstream from the chute and configured to shred and pick apart the blowing wool. The shredding chamber includes a plurality of shredders configured for rotation. Each shredder includes a plurality of paddle assemblies mounted to a shredder shaft. Each paddle assembly has a plurality of paddles. The paddles have a hardness within the range of 60 A to 70 A Durometer to better grip the blowing wool for shredding and prevent jamming of the blowing wool within the shredder.

Abstract: A process and apparatus for shredding tobacco sheets, especially tobacco sheets formed of reconstituted tobacco particles with guar and sugar comprises rotating opposing sets of cutter discs in a partially overlapping relation so as to establish a nip. The cutter discs have notches at spaced locations along a peripheral portion of the cutter discs. Adjacent pairs of cutter discs are spaced apart by a spacer disc with a stripper plate interposed between adjacent pairs of spaced apart cutter discs. A tobacco sheet which is fed into the nip of the sets of cutter discs is shredded by the discs.

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: 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.

Abstract: A moveable shaft assembly including a frame, a first shaft, and a first drive assembly. The frame includes a first support wall and a second support wall opposite the first support wall. The first shaft includes a drive end and a support end and defining a first axis therebetween. The first shaft extends between the first support wall and the second support wall. The first drive assembly rotates the first shaft about the first axis, and the first drive assembly is coupled to the drive end of the first shaft. The first shaft and first drive assembly are moveable relative to the frame in response to a reaction force acting on the first shaft in a direction oblique or transverse to the first axis.

Abstract: An apparatus for fracturing in which: a fracturing tooth is formed so that a base-end portion has a larger diameter than that of a top-end portion, and a tapered part is formed at the base-end portion so as to expand from the top toward the base; a fixing cover is formed along a longitudinal direction of rolls; in the fixing cover, fixing holes for fracturing teeth are formed along the longitudinal direction so that the fracturing tooth is inserted therein; each of the fixing holes has a slope in which the tapered part is in contact at a surface; a fracturing teeth unit is fixed to the roll in a state in which the top-end portion of the fracturing tooth is protruded from the fixing hole radially-outwardly of the roll and the tapered part is wedged between the slope of the fixing hole and the roll.

Abstract: A method of forming a rotatable cutting shaft member having a longitudinal axis and a plurality of axially spaced cutter elements for shredding substrates that are inserted in an opening in a housing of a shredder, in which the shaft member is a part of a shredder mechanism that is activated by a motor in the housing, is provided. The method includes turning opposing end portions of at least a longitudinal section of the rotatable cutting shaft member relative to one another in opposite directions about the longitudinal axis so as to twist at least the longitudinal section of the rotatable cutting shaft member to a predetermined helix angle; and mounting the plurality of axially spaced cutter elements on the rotatable cutting shaft member. The predetermined helix angle orients the plurality of axially spaced cutter elements on at least the longitudinal section in a helical arrangement.

Abstract: An electrical appliance, such as a shredder, having low standby power consumption is provided. A power isolation circuit is positioned to electrically disconnect electronic components of the shredder from the shredder's primary power source. An auxiliary power source may generate or store power for powering electronic components, such as sensors or processors, while the primary power source is disconnected. A power isolation controller may use a timer, light detector, or user interaction sensors to determine whether to reconnect the primary power source to the electronic components.

Abstract: Comminution apparatus is described which is tailored for the processing of green, soft, and fibrous waste. Inner and outer comminution drums bear projecting macerating features which can progressively interact to provide a shearing action on material on waste within the outer comminution drum. Screening apertures on the outer comminution drum allow for the exit of comminuted material.

Abstract: Disclosed herein is a shredder having a device located at least partially between a shredder mechanism and an output side of the shredder housing to disperse any accumulation of shredded materials at least adjacent the output opening, as well as remove shredded materials caught in or near the cutting assembly. One device is a movable device positioned between a shredder mechanism and the output side of the shredder housing that is configured to pivot about an axis in an oscillating manner. Another device includes a fan mechanism for blowing and moving shredded materials through a passageway in the shredder housing and towards an outlet.

Abstract: A paper shredder includes an upper cover and a pressing structure. The pressing structure includes a base plate and a retractable member. The retractable member includes a push rod, a first sleeve, and an elastic element. The first sleeve includes a first hollow portion. The push rod is inserted into the first hollow portion of the first sleeve. The elastic element is disposed within the first hollow portion of the first sleeve. When the paper stack is contacted with the base plate to push the push rod, the push rod is transferred through the first hollow portion of the first sleeve and the elastic element is pushed by the push rod. Consequently, the elastic element generates an elastic force to press the paper stack.

Abstract: A shredder mechanism is disclosed herein including first and second shredder portions positioned opposite one another and defining a slot therebetween. The first and second shredder portions each include a longitudinal support having more upper fins and a plurality of lower fins. each defining a shaft receptacle. A shaft is positioned between the upper and lower fins positioned within the shaft receptacles. A plurality of cutting blades are mounted to the shaft and extend into the slot. Each of the one or more upper fins and the plurality of lower fins extend among the plurality of cutting blades. The longitudinal support includes upper and lower support portions having the one or more upper fins secured to the upper support portion and the plurality of lower fins secured to the lower support portion.

Abstract: A shredder for shredding substrates has a shredder mechanism, a motor, and a pair of cooperating shredding structures each having a set of spaced apart cutter elements interleaving with one another such that substrates are fed between the interleaved sets of cutter elements. At least one of the cooperating shredding structures includes a rotatably mounted shaft rotatable by the motor with its cutter elements mounted in spaced apart relation with spaces therebetween. The shaft has a tubular body with an inner surface defining a hollow interior, an outer surface, and a plurality of openings formed through the tubular body open to the inner and outer surfaces. The openings are open to the spaces between the cutter elements on the shafts. A supply of lubricant communicates with the plurality of openings of the shaft to deliver the lubricant from the interior of the shaft to the cutter elements through the openings.

Abstract: A shredder having a feed passage configured to receive material to be shredded by the shredder. The shredder also has a thickness detector configured to measure the thickness of the material being fed through the feed passage. The thickness detector includes a contact member movable from a limiting position engaging one wall of the feed passage, away from the wall, against a biasing force acting on the contact member. A sensor is configured to measure varying displacement of the contact member from the limiting position. A controller is configured to zero the thickness detector at times during operation of the shredder when no material is being fed through the feed passage so that the thickness of the material being fed through the feed passage is measured with respect to a zero position of the thickness detector.

Abstract: Grain crushing apparatuses for processing grain are disclosed. In one embodiment, a grain crushing apparatus includes a first and second sidewall spaced apart from one another a throat dimension in a first direction, and a first and second support shaft positioned transverse to the first and sidewall. The first and second support shaft are each configured to rotate about an axis of rotation. The grain crushing apparatus also includes a first and second grain crushing roller. Each of the grain crushing rollers include a plurality of teeth extending from a root a tooth height. The first and second grain crushing rollers are intermeshed with one another such the first and second grain crushing roller are maintained at positions spaced apart from one another in a second direction normal to the first direction by an overlap distance less than the tooth height.

Abstract: A water-powered fish carcass disposal system that floats in a body of water, grinds fish carcasses into pieces having a desired size, and returns the pieces of the ground fish carcasses into the body of water.

Abstract: An auto paper-combing mechanism of a paper shredder has a frame formed with a feeding channel and a fixing shaft, and a feeding salver. A plurality of combing needle beds are disposed on the fixing shaft; a combing needle is inserted in the bottom of each combing needle bed. The needlepoint of each combing needle heads toward the outlet of the feeding channel, and the height of combing needles are in a ladder-like distribution. The vertical distances between the needlepoint of each combing needle and the lower edge of the outlet of the feeding channel are equal.

Abstract: A method, and method-implementing system structure, for metering the flow of material through the shredding zone in a rotary shear shredder, which zone is defined, at least in part, by confrontingly rotating knives that are carried on a pair of adjacent, power-driven, nominally matched-motion counter-rotating shafts. The method includes holding the speed and rotational direction of one of the shafts essentially constant while selectively varying, in a manner variably differentiating the relative rotational motions of the two shafts, the speed, and under certain circumstances also the direction, of rotation solely of the other shaft.

Abstract: The invention relates to a shredder for cutting up data storage media, for example sheet-like materials (paper, stacks of paper, etc.), CD-ROMs, DVDs, floppy disks or articles of that kind, the material feed of which is assigned a switching device for at least automatically starting its cutting tool when materials to be shredded are being fed, in particular an office shredder whose feed opening of the material feed, which leads to the cutting tool, is assigned at least two signal-emitting sensors which are arranged at a distance from one another and are operatively connected to a control unit by means of circuitry.

Abstract: An apparatus for compressing empty containers, in particular of beverage bottles or beverage cans made out of plastic, in particular out of polyethylene terephthalate PET, or tin plate. The apparatus has a cutting and pressing unit as well as means for driving and for controlling the cutting and pressing unit, wherein the cutting and pressing unit contains at least two cooperating, oppositely rotating rollers disposed at a distance relative to each other with respect to their rotation axes, wherein each roller has several disks in each case disposed towards each other with an axial distance (free space). According to a special further development it is proposed that at least in the operating region of the two rollers there are disposed axially next to each other a first working region for a compressing of containers made out of plastic and a second working region for a compressing of containers made out of metal.

Abstract: A shredder is disclosed. The 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 mechanism enables the at least one article to be shredded to be fed into the cutter elements. The motor is operable to drive the cutter elements so that the cutter elements shred the articles fed therein. 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 operable to perform a predetermined operation responsive to the detector detecting that the thickness of the at least one article is at least equal to a predetermined maximum thickness.

Abstract: An article destruction device includes an electric motor driving at least one moving component. An indication panel includes at least three visual indicators situated in sequence. Each visual indicator is associated with a stage of an approaching overload (motor cool down) condition. A first visual indicator lights when the motor or corresponding sensor temperature is below a first threshold, i.e., when the device is first powered on. A second indicator lights when the temperature exceeds the first threshold and is below at least a second threshold, i.e., the temperature is approaching a fault condition. A last visual indicator lights when the temperature exceeds the first and the at least second thresholds, i.e., the fault condition is met. A thermistor on the motor energizes (self-heats) with the motor. A thermostatic switch controls current flow through windings of the motor depending on measured temperatures meeting operating and equilibrium temperature thresholds.

Abstract: This invention relates to a paper shredder. A first stage shredder accepts paper from a hopper. The first stage shredder includes two knife shaft assemblies with a plurality of sequentially oriented knives and spacers on hexagonal shafts. A second stage shredder accepts the output of the first stage shredder. The second stage shredder has two counter rotating shafts with saw tooth disk knives and separating spacers and cuts the paper finer than that of the first stage shredder. A third stage shredder may be connected to the second stage shredder providing even further paper size reduction.

Abstract: A shredder is disclosed. The 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 mechanism enables the at least one article to be shredded to be fed into the cutter elements. The motor is operable to drive the cutter elements so that the cutter elements shred the articles fed therein. 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 operable to perform a predetermined operation responsive to the detector detecting that the thickness of the at least one article is at least equal to a predetermined maximum thickness.

Abstract: A shredder comprises a shredder housing and a shredder mechanism received in the housing. The shredder mechanism includes a motor and cutter elements and enables at least one article to be shredded to be fed into the cutter elements. The motor is operable to drive the cutter elements in a shredding direction. The shredder also includes a plurality of supporting structures between the shredder mechanism and the shredder housing. The shredder housing has a plurality of support surfaces. Each of the plurality of supporting structures is engaged but not fixedly connected on a corresponding support surface, thus allowing movement of the shredder mechanism in X, Y, and Z directions. At least one motion limiter is provided to limit the relative movement between the mechanism and the housing. The shredder mechanism may be urged to a centered position. The supporting structures may reduce vibrations and noise during operation of the shredder.

Abstract: A system and method of processing bone is disclosed. A tissue separator is utilized to separate tissue comprising at least one of muscle, periosteum and connective tissue from bone in a safe, sterile and efficient manner. In one aspect, the particle reducer can include an impeller positioned with respect to a cutting surface on a drum. At least one of the impeller and the drum is rotated by a power source such that harvested tissue frictionally engages the cutting surface. In another aspect, a source of pressurized fluid can be directed at tissue to separate bone from non-bone tissue.

Abstract: Disclosed are an automatic paper feeding sensing device and a paper feeding device for a paper shredder, and a paper shredder including the automatic paper feeding sensing device and the paper feeding device. The automatic paper feeding sensing device of the present invention includes a detection sensor fixed to an end of a sensor bracket disposed at a side of a paper feeding entrance of a paper shredder; and a rotating lever rotatably disposed between the paper feeding entrance and the detection sensor to open or close a front side of the detection sensor by the rotation thereof. The paper feeding device of the present invention includes a paper feeding section, a paper feeding entrance, a paper feeding rollers and a pressurizing portion.

Abstract: Lubrication system for application of lubricant to the cutting mechanism of paper shredders. Maintenance and lubrication can be performed by applying lubrication agents to the cutting mechanism of a paper shredder without requiring disassembly of the paper shredder. The agents can also include scented agents and decomposing agents or a combination thereof. Lubrication sheets are configured to apply agents to the cutting mechanism of paper shredders. A holder can be positioned on a housing of a paper shredder for retaining one or more lubrication sheets within proximity of the shredding mechanism of the paper shredder. Paper shredders may include means for identifying when lubrication is needed and/or when the cutting mechanism of the paper shredder has been lubricated by a lubrication sheet.