Abstract: A granulator knife having opposed reversible cutting edges. The knife is seated in a rotor or a bed and secured by a clamp. When the first knife edge is worn, the knife may be reversed. Adjustment of the knife position is not necessary.

Abstract: The invention relates to a mill and to a method of applying a coating of wear-resistant material to the surface of a cylinder crushing shell. According to the invention the coating is formed by the winding of a profiled strip about the suface of the shell.

Abstract: A tooth for use in a comminuter roll comprises a roll of spring steel having a first end formed into a point or other abrading shape. The tooth is compressed upon insertion into a mounting hole in the roll and the inherent spring of the steel tends to force the tooth back to its original size, thereby creating forces on the interior of the mounting hole to form an interference fit that holds the tooth in place in the mounting hole. In a preferred embodiment, the tooth is formed of a roll of spring steel having a G-shaped cross section. This shape provides an opening through the length of the tooth and also leaves a solid place in the center of the tooth to aid in tooth removal. A rod can be slipped through the lengthwise opening of the first tooth so that its end abuts the solid center portion of the second tooth that is colinearly mounted in the other end of the hole that the first tooth is mounted in. Tapping the rod will force the second tooth out of its hole without disturbing the first tooth.

Abstract: A rotor assembly for a shavings making machine having a plurality of knife and wedge assemblies is disclosed. The knife and wedge assemblies are removably mounted in channels or pockets extending parallel to the rotor axis along the length of the circumference of the rotor. In mounting each knife and wedge assembly to the rotor, the knife insert is first mounted on the respective wedge insert and the wedge insert is then mounted on the rotor. The bolts or other means for mounting each knife insert on the wedge insert are located below the periphery of the rotor and adjacent one side wall of the respective channel such that the bolts cannot back out or become loosened due to vibrational forces. Each knife insert has two reversible blades which are symmetrical. A flattened surface on the rotor adjacent each knife insert assists in providing an effective cutting operation. The metallurgical composition of the knife inserts can be varied to accommodate the material in a particular application.

Abstract: To retain elongated removable cutter elements (9, 90) on an axially elongated cylindrical body structure (1, 1'), eccentric holding plugs (27, 30, 300) are directly or indirectly engageable with the cutter elements so that the cutter elements can be clamped in grooves (5) with converging side walls, by engaging the eccentric elements either directly against the cutter elements (FIG. 4) or indirectly via a resiliently deflectable or deformable portion (16) of the tool body (1, 1'). The tool body can be formed as an open cage structure (1') (FIGS. 5-8) to permit granulated plastic material to fall between rods or rails (34) formed with the grooves (5) in which the cutter elements (9, 90) are retained by the eccenters (27).

Abstract: A portable, self-contained stump remover, that may be hand held by the operator, has an engine driven cutting device whose cutting teeth rotate through a circular path at least a part of which lies below a lower base surface that engages and rests on a tree stump when the stump remover is placed on the stump by the operator. By manually moving the stump remover across the stump so that the rotating cutting teeth follow the base surface, which surface serves to support, guide and stabilize the stump remover, the stump will be cut away and ground down to the cutting depth determined by the extent to which the cutting teeth project below the base surface.

Abstract: The impeller bars of an "open" type rotor of an impact cruscher are clamped to each disc of the rotor by means of pairs of cooperating wedges. Each pair of wedges consists of a first wedge acting radially outwards of the rotor between the disc and the impeller bars and a second wedge acting axially of the rotor between the disc and the first wedge to drive the first wedge radially outwards. Means including a hook are also disclosed for lifting the impeller bars onto the rotor for initial installation as well as for later repositioning of the bars to compensate for wear.

Abstract: The rotor of an impact crusher includes an locking mechanism for impeller bars which may vary in thickness. The locking mechanism includes a compound wedging mechanism which generates an initial, axial urging force by tightening a bolt at an accessible location on the rotor. The force is translated to a first wedge through a second wedge to urge the first wedge outward into an outward converging gap between a side wall in a disc of the rotor and the impeller bar to seat the bar. The mean width of the first wedge is adjustable to accommodate impeller bars of various thicknesses. A guide track in the rotor and specifically in discs of an "open" rotor locate the second wedge in relationship to the rotor and independently of the width adjustment of the first wedge to maintain a constant point of force application against the first wedge.

Abstract: The blade is made of flat stock, is elongated with a series of the teeth formed along one elongated arcuate edge, the tips of the cutting teeth being disposed along a circular arc. The blade is adapted to be inserted within an elongated slit made in the cylindrical wall of the mower rotor with the teeth protruding from the rotor. The leading end of each blade is provided with an inwardly facing step adapted to rest on the cylindrical wall at the corresponding end of the slit. The trailing end of the blade has a notch to receive the rotor wall at the other end of the slit. The blade has a hole to receive a rod, extending within the rotor and carried by the latter to maintain the blade in position. Each blade has a boss protruding from a main face to prevent the blade from slipping within the rotor. The slit faces are inclined with respect to the rotational axis of the rotor, so as to maintain the blade in an inclined position, to more fully expose the successive teeth for better cutting efficiency.

Abstract: This grinding roller intended for use in a material bed roller mill comprises a basic body and a roller shell composed of individual firmly clamped segments, and several sheets of softer material which run transversely and are aligned radially are cast into each segment which is made largely from chill casting. In a simple manner this produces a surface profiling of the roller shell which remains approximately constant during the operating life of the segments with improved feeding behavior of the material for grinding.

Abstract: A cutting bit for mounting in a block mount. The cutting bit including a working head and a shank depending therefrom. The shank includes a recess formed within at least one side portion thereof. The block mount includes two matching half members secured on opposing sides of a rotating disc. A slot extends perpendicularly across at least one of the half members to receive the shank in a wedge like fit. Formed within the slot is a pin for mating engagement with the recess.

Abstract: The disclosure relates to an apparatus for granulating excess material in the production of plastic article by means of knives (41) disposed at one end of a feeder screw (20) and cooperating with a number of preferably fixed counter knives (41) and a grid (57), each knife rotating with the screw (20) having a seat (40) which extends between an end plate (26) and a ring (31) most proximal the end of the screw (20) and being fixed therein at the ends, a knife blade (41) adapted to the configuration of the seat (40), and a bar (42) for fixedly clamping the knife blade (41) in the seat (40).

Abstract: The invention relates to a machine for the crushing of clay-like mineral materials to prepare them for a subsequent process such as brick-making, the machine comprising a pair of parallel rotors defining therebetween a crushing gap, and a perforated grid adjacent one or each rotor to define therewith a sizing gap.

Abstract: A disposable, double-edged rotor knife and a disposable, double-edged bed knife for use in plastic granulating machines. The rotor knife has a general "Z" shape and is held in sandwiched engagement to the rotor of the machine by a clamp that has a wedge shaped bottom. The clamp wedges the rotor knife into a wedge shaped channel formed in the rotor when a bolt that does not pass through the rotor knife is tightened. In one embodiment, the longitudinal axis of the bolt is parallel to a plane normal to the axis of rotation of the rotor, and in a second embodiment a ten degree angle is formed between the axis of the bolt and the plane. The bed knife is keyed to the machine.

Abstract: An apparatus for chipping solid materials generally comprises a chippr having a plurality of blades mounted between two hubs and spaced from one another and the shaft so that the chipped material does not jam the chipper. The blades preferably have a blade angle of from about 35 to about 60 degrees. An apparatus including the chipper, a device for support solid billets, and a conveyor for conveying the solid billets over the supporting device and into the chipper is also provided and advantageously occupies a minimum space.

Abstract: A wood cutting knife is provided for producing wood chips or flakes. The knife includes a central cutting member, and two wing members positioned on opposite sides of the central cutting member. The height of the wing members determines the depth of cut of the cutting knife, including the central cutting member. Also provided is a wood processing machine for supporting such cutting knives which includes a plurality of anvil members configured to interact intimately with the cutting knives. Also provided is a breakaway feature between the cutting members and a supporting surface defined by the wood processing machine. The supporting surface is relatively smooth, and the cutting knives are mounted to the surface by weldments. If a cutting knife encounters unprocessable foreign material such as metal or rock, the knife breaks away from the supporting surface at the weldment connection, and severe damage to the supporting surface or machine is avoided.

Abstract: To permit easy replacement of individual cutter elements (13) located on a cylindrical body (1, 1') formed with essentially axially directed, circumferentially uniformly distributed grooves (5) therein, and in which the cutter elements are held by eccentric clamping bodies (40), and to ensure that the cutting edges of the cutter elements operate on a common theoretical circumferential cylinder, the grooves (5) are formed with internal ppositioning abutments (12, 8) which determine, upon engagement with matching engagement positioning surfaces (26) formed on the cutter elements, the positioning surfaces (26) thereby render the position of the cutter elements in the grooves independent of the cutting geometry of the respective elements.

Abstract: To provide for self-holding of cutter elements in grooves of a rotary cutter body (1; 100, 30, 33), which self holding is enhanced by centrifugal forces acting on the cutter elements, the grooves (2) in the body define first and second lateral support surfaces (13, 5), the cutter elements (6, 6a, 6b, 6c) define first and second engagement surfaces (12, 11) and a clamping element (7, 7') is provided defining an engagement surface facing the cutter element, the surfaces being so arranged that at least part of the first support surfaces (13) and at least part of the first engagement surface (12) of the cutter element form, in cross section, a wedge-shaped space which decreases in width towards the circumference of the cylindrical body, and each clamping element, in cross section, likewise is wedge-shaped and dimensioned and shaped to fit the wedge-shaped space. Preferably, the lateral support surfaces (5) define an acute angle with respect to each other.

Abstract: The impeller bars on an "open" type rotor of an impact crusher are clamped to each disc of the rotor by means of pairs of cooperating wedges. Each pair of wedges consists of a first wedge acting radially outwards of the rotor between the disc and the impeller bars and a second wedge acting axially of the rotor between the disc and the first wedge to drive the first wedge radially outwards. Means including a hook are also disclosed for lifting the impeller bars onto the rotor for initial installation as well as for later repositioning of the bars to compensate for wear.

Abstract: A device for cutting articles into chips, having a rotating milling roller (12) which is provided on its periphery with cutting tools which are formed as cutting teeth (26) protruding from a chain (30) which is helically wrapped on the periphery of the milling roller (12) and which has its two ends fastened in the region of the two face ends (22) of the milling roller (12).

Abstract: A shearing wheel, and a method of assembling the same, having individually demountable cutting elements or tool members side mounted to a mounting region of an annular member. The tool members are mounted in successive abutting relation so that a portion of each tool member extends radially beyond the annular member. This extending portion forms a toothlike structure for feeding and ripping waste material. A support shoulder extending axially from the annular member contacts and supports the tool members. The tool members may be individually removed and resharpened, whereafter shims are positioned between the tool members and the annular member to properly space the tool members from an adjacent shearing wheel.

Abstract: A toothed strip or forming a clothing on a roller is formed of a plurality of teeth disposed along a front face of the face in alternating relation with a plurality of troughs. Each tooth has an equilateral triangle shaped front face with a flat apex and an equilateral triangle shaped back which extends from the apex of the front face of the tooth. Each trough is inclined upwardly from the front face of the strip towards the rear and merges into the backs of adjacent teeth. During operation, fibers are able to fold about the teeth without the free ends of the fibers coming together and coiling.

Abstract: A knife roller used in an appliance for the precomminution of frozen blocks of material, such as frozen meat, having a roller member on which is fastened at least one cutting member. The cutting member has a U-shaped bow knife formed by a shearing knife and two precutters for cutting strips of material from the frozen blocks. The shearing knife and precutters define a chip passageway in which at least one transverse knife is secured for further cutting the strips of material into smaller chips of material.

Abstract: A rotary grinder is described including a hopper for receiving waste through a door, which door when closed, provides a fluid tight seal. A movable waste receptacle is provided beneath the grinder and is locked in place and weighed during the operation of the grinder. An iris diaphragm valve mates with the outlet from the grinder and, when in its open orientation, drops a sleeve into the waster receptacle thereby creating a sealed enclosure for the decontaminated waste material. Cutting blades employed by the grinder are identical and are provided with bearing shoulders which determine the amount of blade exposed when the blades are mounted on rotating arms of the grinder.

Abstract: A mantle for use with a rock crushing apparatus comprising an essentially tubular mantle body having side walls defining an exterior surface and a hollow interior being adapted to fit over the main shaft of a rock crushing apparatus. Wear plates for attachment to the exterior of the mantle body are provided, an adhesive filling material being used between the mantle body and the wear plates. A system of locking bolts are used to removably locate the wear plates to the outer surface of the mantle body.

Abstract: A wood cutting knife is provided for producing wood chips or flakes. The knife includes a central cutting member, and two wing members positioned on opposite sides of the central cutting member. The height of the wing members determines the depth of cut of the cutting knife, including the central cutting member. Also provided is a wood processing machine for supporting such cutting knives which includes a plurality of anvil members configured to interact intimately with the cutting knives. Also provided is a breakaway feature between the cutting members and a supporting surface defined by the wood processing machine. The supporting surface is relatively smooth, and the cutting knives are mounted to the surface by weldments. If a cutting knife encounters unprocessable foreign material such as metal or rock, the knife breaks away from the supporting surface at the weldment connection, and severe damage to the supporting surface or machine is avoided.

Abstract: There is disclosed for use in a machine for shredding scrap automotive tires or the like of the type comprising a pair of oppositely rotating rotors having interdigitated tire cutting discs keyed thereon and replaceable abrasion resistant wearing plates at opposite sides of said disc, an improved means for locking said plates in operative positions on said discs, whereby worn plates may be replaced by new plates from externally of the rotors without requiring costly disassembly and reassembly thereof.

Abstract: The crushing surfaces (a) or (b) are composed of two types of blocks 1 and 2 which differ in wear resistance and which are arranged alternately.

Abstract: There is disclosed a rotary knife assembly for shredding straw. It includes a non-cylindrical driving shaft and a plurality of like knifing devices mounted in succession along the shaft, each device having a pair of generally flat shredding parts. Each such part comprises a central portion having a straight edge and radial teeth projecting from the central portion, the latter further having a notch located centrally of the straight edge, notch configured to seat radially over half of the shaft. The central portion also has a boss on one face forming an arcuate shoulder around the notch. The shredding parts of each device are held in coplanar position, when the straight edges meet, by a tube of which one end closely surrounds the shoulders of the bosses, which shoulders extend along a common circle. The same end of the tube abuts one face of the parts thus holding the parts in coplanar position and preventing them from separating along their straight edges.

Abstract: A conical grinding cutter for use in grinding, or refining, wood pulp, wherein the cutter part constituted by the mantle of the cone is assembled of a plurality of separate sectors. In order to improve the grinding cutter of prior art composed of sectors, in the present invention the cutter sectors have been welded together by their sides for achieving a rigid juncture substantially over the entire length of the grinding cutter.

Abstract: A cutting tool (10) of generally circular shape made by investment casting. Removable teeth (15) are secured in through-holes (14) in an annular support (13) and may be removed by removing locking nuts (18). The teeth (15) are angled transversely relative to the plane of the hub so that their respective cutting edges overlap to give a resultant cut wider than the annular support (14). The tool is particularly useful for grinding tree stumps or like and may be used on a stump grinder of the type described in U.S. Pat. No. 4,441,534.

Abstract: A hammer assembly for a rotary material crusher having a rotor. The hammer assembly includes a hammer member and a base member. The base member is mounted at one of its ends on the rotor. The hammer member is mounted on the other end of the base member. The hammer member and base member each have two pairs of concave and convex surfaces, one for absorbing centrifugal forces and the other for absorbing impact forces and meshing, one surface with the other. The pair of concave and convex surfaces for absorbing centrifugal force are behind of the centrifugal force radial line of the hammer member in the direction of rotation of the rotor.

Abstract: An impact crusher rotor comprises radially slotted discs secured to a shaft at axially spaced intervals and hammer bars releasably secured in the disc slots. A backup bar secured in a slot in every disc provides a keyed connection with a hammer bar, at its rear, and a wedge in the slot maintains the hammer bar engaged against the backing bar with a force that increases with rotor speed. Each wedge can be established in an initial locking position by a screw that has its length radial to the rotor axis, has a threaded connection with the wedge, and has an end reacting against a bottom disc surface defined by the slot. Each wedge is confined to radial motion relative to the disc by a U-shaped shoe which straddles the disc periphery and is releasably fixed to the disc and which also protects a portion of the disc periphery that is in front of the hammer bar.

Abstract: A rotary grinder is described including a hopper for receiving waste through a door, which door when closed, provides a fluid tight seal. A movable waste receptacle is provided beneath the grinder and is locked in place and weighed during the operation of the grinder. An iris diaphragm valve mates with the outlet from the grinder and, when in its open orientation, drops a sleeve into the waste receptacle thereby creating a sealed enclosure for the decontaminated waste material. Cutting blades employed by the grinder are identical and are provided with bearing shoulders which determine the amount of blade exposed when the blades are mounted on rotating arms of the grinder.

Abstract: A coal crusher roll includes a smooth tubular cylindrical back-up roll having a series of regularly spaced tapped radial holes to receive bolts by which eight identical shell segments may be fastened on the back-up roll. The holes at the axial ends of the segments are undercut to provide a rabbet into which fits the tang of a special lifting hook by which the segment can be easily handled by a lightweight crane. A recess in the central part of the segment defined by a peripheral berm around the backside of the segment reduces the weight of the segment, provides a place for receiving balancing weights, and simplifies the face fit machining for the segment with the back-up roll.

Abstract: A wood cutting knife is provided for producing wood chips or flakes. The knife includes a central cutting member, and two wing members positioned on opposite sides of the central cutting member. The height of the wing members determines the depth of cut of the cutting knife, including the central cutting member. Also provided is a wood processing machine for supporting such cutting knives which includes a plurality of anvil members configured to interact intimately with the cutting knives. Also provided is a breakaway feature between the cutting members and a supporting surface defined by the wood processing machine. The supporting surface is relatively smooth, and the cutting knives are mounted to the surface by weldments. If a cutting knife encounters unprocessable foreign material such as metal or rock, the knife breaks away from the supporting surface at the weldment connection, and severe damage to the supporting surface or machine is avoided.

Abstract: A shredder having a stationary comb cutter and primary and secondary cutters on the rotor providing "punch and die" shearing action suitable for shredding wallboard or the like. Means for metering the incoming feed through a pair of nip rollers, the upper set of which is spaced inboard such that they do not press on the side edges of the wallboard as it passes through the nip.

Abstract: An apparatus for processing wood, comprising a cylindrical drum mounted for rotation about its longitudinal axis, a cutting member, means for mounting the cutting member upon the circumferential surface of the drum such that its cutting edge is positioned a first distance from the drum surface, means for rotating the drum such that the cutting element passes along a circular path concentric to the surface of the drum, a pair of parallel ring sections each having a first and a second end and a substantially uniform cross section, and having an arcuate configuration along their length substantially conforming to the circumferential surface of the surface of the drum, the first ends of the spacing elements being positioned laterally adjacent to the path of travel of the cutting member, and extending in parallel relationship in front of the cutting member such that a gullet is defined in front of the cuting edge by the cutting member, the ring sections, and the surface.

Abstract: A mineral breaker including at least one breaker drum carrying a plurality of breaker teeth projecting radially therefrom, at least one breaker tooth comprising a tooth core projecting radially outwardly of the drum and having leading and trailing faces, an open sided tooth sheath including a leading wall and a trailing wall connected to one another at one end by a connecting wall which forms the terminal end of the tooth, the inner surfaces of the leading and trailing walls of the tooth sheath having flat faces which abuts against opposed flat faces on the tooth core.

Abstract: A wood cutting knife is provided for producing wood chips or flakes. The knife includes a central cutting member, and two wing members positioned on opposite sides of the central cutting member. The height of the wing members determines the depth of cut of the cutting knife, including the central cutting member. Also provided is a wood processing machine for supporting such cutting knives which includes a plurality of anvil members configured to interact intimately with the cutting knives. Also provided is a breakaway feature between the cutting members and a supporting surface defined by the wood processing machine. The supporting surface is relatively smooth, and the cutting knives are mounted to the surface by weldments. If a cutting knife encounters unprocessable foreign material such as metal or rock, the knife breaks away from the supporting surface at the weldment connection, and severe damage to the supporting surface or machine is avoided.

Abstract: Apparatus for crushing chunks of trees and tree stumps comprising a solid cylinder having cutting elements extending from the surface. The housing containing the cylinder is provided along one side wall with stationary cutters extending out toward the surface of the cylinder between the columns of the cutting elements which are moving as the cylinder rotates. The space between the stationary cutters and the surface of the cylinder is adjustable in order to be able to select the size of particles being produced. A conveyer beneath the housing carries away the particles. The cutting elements are mounted in such away as to permit easy replacement in the event of a failure. Means are provided to drive said cylinder at no more than 50 RPM.

Abstract: The cutters (9) in a cutting grinder have according to the invention the shape of a rectangular parallelepiped which can be partly inserted into co-operating box-shaped sockets in the surface of the drum (8). The cutters (9) are retained by balls (14) which by means of a pin (13) being screwed in through the outer face of the plate (9) are pressed into a groove (7) arranged in the side of the socket. It is thereby possible to replace or to turn the cutters (9) by simply screwing out the pin (13) and so avoid the hard and difficult process of welding the cutters to the drum. It is thus possible to lower maintenance costs of the cutting grinder substantially just as it is possible according to requirements to mount cutters of different shape and number. The cutting grinder thus becomes universal.

Abstract: Sugar cane is processed using an apparatus, which includes an input end with a comb back conveyor for controlling the quantity of cane passing to the remainder of the apparatus; an aligning; first cleaning and thin out section, where randomly oriented cane stalks are aligned and foreign bodies, especially stones and ferrous objects are removed from the cane; a billeting or cutting section for cutting the stalks into billets; a second cleaning section in the form of a cleaning tower in which vertically moving air is used to remove leaves, dust and any other trash from the flow of cane; a chute and pivotally mounted swing conveyor for distributing cane billets in an elongated, partitioned distributing hopper; a surge elimination chute; a billet aligner and delivery unit for delivering cane billets to a plurality of separators for separating the epidermis from the cane billets and separating the rind from the core; and a discharge section, including conveyors for discharging the separated material from the appar

Abstract: A shredding machine with a cylindrical rotor mounted to rotate with the axle. The exterior surface of the rotor having a plurality of tapped apertures disposed about the surface in arcuately, axially and helically spaced relationship. The rotor has a plurality of circular axially spaced parallel ring sets fixedly mounted thereon. Each set includes a pair of axially spaced parallel rings. The rings of each set have a plurality of arcuately spaced, axially registering notches. Each ring set is positioned to place between the rings a plurality of the apertures which register axially with the notches. A plurality of arcuate spacer segments arcuately positioned between rings of a set and spaced to have arcuate gaps that register with the tapped apertures and ring notches. The head end of each segment adapted to overlay the leading end flange of an arcuate ripper tooth and the trailing end of the tooth and foot end of the segment being spaced from each other arcuately by the diameter of a threaded aperture.

Abstract: A mineral breaker having at least one breaker drum, the drum including a generally cylindrical support body from which a plurality of radially extending projections project by a distance equal to at least half the radius of the body, each projection being covered by a tooth sheath to define a breaker tooth having a maximum radial dimension projecting beyond the circumference of the support body which is greater than a major portion of the radius of the support body.

Abstract: A screenless mill which grinds and simultaneously conveys material utilizes a grinding system constituted by a rotating shaft on which grinding elements are fixed in a helical arrangement. The helical arrangement forms a screw which facilitates the advancement of the material in addition to grinding it. The screw pitch is adjustable in such a manner that when the material reaches the discharge port it has attained the required particle size. The grinding elements are readily interchangeable to permit replacement of worn or damaged parts or to treat a variety of materials as well as to vary the degree of grinding to be attained.

Abstract: A device for chipping wood with the aide of a combination of a cylinder rotatable about its longitudinal axis and provided with one or more protruding, longitudinal knives and a counterknife disposed along side the cylinder wherein along at least 3/4 of its length, the cylinder has a surface with transverse grooves and, viewed in the direction of rotation, in front of each knife, a slot for temporarily collecting and conducting away the chipped wood.

Abstract: A mineral breaker is disclosed having a rotary central shaft upon which a plurality of collars (10) are non-rotatably secured. Each collar has a first pick support ring (13) secured at each of its ends with two second pick support rings (19) slidable on the collar between the first support rings. Each pair of first and second support rings defines between them a plurality of separate locations for picks (35). An infill ring (28) formed in two halves is fitted on the collar between the two second support rings (19) and forces the rings (19) against the picks to secure them tightly in position. A pair of threaded bolts secure the two halves of the infill ring together and also allow quick and easy release of the halves, and thus removal from the collar to allow the rings (19) to be slid from the picks, when pick replacement is required.

Abstract: A wedge and clamp device for retaining a wedge in a slot of a disc and against a breaker bar of a rotor assembly in an impact crusher. The clamping arrangement comprises a sleeve which is placed inwardly in the slot, two plates each mounted along the opposed outer faces of the disc in alignment with the sleeve and a bolt extending through the sleeve and two plates. The wedge has a U-groove along its top surface to receive the opposite edges of the disc, and the two plates overlap the wedge so that the wedge can move in a direction out of the slot to increase the holding force against the breaker bar during operation of the crusher.

Abstract: A paper shredder includes a stator housing on which stator blades are adjustably mounted and a rotor assembly on which rotor blades are securely attached. As the rotor turns within a comminuting chamber, the rotor blades and the stator blades provide a scissors-like cutting action. The stator blades are fixed onto the stator housing with their cutting edges aligned in parallel with the axis of rotation of the rotor assembly. Each rotor blade lies in a plane which is skewed with respect to the axis of rotation, and the cutting edge of each rotor blade is substantially concentric with the axis of rotation. In the preferred embodiment, the rotor and stator blade assemblies are enclosed by three sizing screen quadrant sections. One quadrant section remains open for receiving paper into the comminuting chamber. The paper remains inside the comminuting chamber until it is small enough to pass through the openings of the sizing screen.