Abstract: An autogenous impact mill (10) is operative to size reduce friable material particles processed through operation of the mill. At least one impeller (58) rotatable within an interior area (44) of a housing (12) of the mill is operative to produce one or more air jets. The air jets are operative to suspend material particles using the Coanda Effect. Other particles moved by the air jets bounce off ricochet bars (74) and impact suspended particles so as to break and reduce the particles to a suitable size to pass through a screen (110) to an outlet opening (42).

Abstract: A cardboard shredder provides a shredder for cardboard to facilitate recycling while reducing storage space needed before cardboard enters a recycling stream cutting out the middle man, thus the recycler receives uncontaminated cardboard since it is not mixed in with other materials. The manufacturer receives clean shredded cardboard for reuse, reducing headcount for the plant by reducing and eliminating their shredders being jammed with plastic. Thus, an improvement in efficiency and reduction in costs of material and water.

Abstract: A manual mill that indicates through force feedback and free spin the completion of processing of the material inside through shearing, grating, and crumbling, without the use of teeth or protrusions, with easy grip-and-lift access to said processed material.

Abstract: A crusher for rubble includes a crushing chamber in which the nibbles are ground, a grinding group inserted in the crushing chamber to grind the rubble, and a conveying channel of the rubble into the grinding group. The crusher includes two or more pushers, which act in the conveying channel toward the grinding group to push the rubble against the grinding group, and which are controlled separately from each other, so to be place one or more of the pushers at rest separately when one or more of the other ones are actuated.

Abstract: An auger for a grinder material for a tire filling machine, having: a cylindrical column; and a plurality of flights extending outwardly from the cylindrical core, wherein (i) the flights are arranged in pairs extending radially outwards from the cylindrical column at 180 degrees to one another, and (ii) each flight has a sharpened leading edge. Each pair of flights are positioned at angles of approximately 50 or 60 degrees to one another, and each flight extends approximately half way around the circumference of the cylindrical column, and there are no outer edge notches in the flights.

Abstract: A material bed roller mill for comminution of grain in a material bed. The material bed roller mill comprises rollers, at least one feed opening, a draw-in region between the rollers, a grinding gap between the rollers and at least one delivery opening. The material bed roller is configured, during operation, to produce a material bed in the draw-in region and to draw grain from a surplus thereof by a filled material duct or hopper. A specific grinding force of the material bed roller mill can be set in such a way that grain is heated, during the grinding operation, by less than 30° C., preferably by less than 15° C., to the temperature of the grain before the respective grinding.

Abstract: Mobile power generation systems and methods for minimizing bending forces associated with support include providing a trailer including a rear end, a front end, a bottom end, and a top end, a gas turbine housed inside the trailer, an electrical generator coupled to the gas turbine to generate electricity and housed inside the trailer, and one or more support jacks configured to support a base at the bottom end of the trailer with respect to a ground. The base includes a closed cell base structure, the closed cell base structure including a rigid surface to be mounted on top of the one or more support jacks, the closed cell base structure configured to include a sufficient amount of torsional stiffness to provide torsional stability and assist with distribution of uneven loads due to variance of forces from the one or more support jacks against the rigid surface.

Abstract: What is disclosed is a container for transporting and storing goods, having a floor and side walls extending from the floor. In accordance with the invention, at least one of the side walls or a part thereof is formed by a grid-like structure which is extensible and compressible or able to be pulled apart and squeezed together at least in one direction and within the side wall plane so as to demarcate or to close the container toward the side in a first position and to release the container toward the side in a second position.

Abstract: A paper shredder cutting assembly having an arbor, spaced-apart cutting blades on the arbor, a rigid frame set apart from and parallel to the arbor, and braces coupling the arbor to the frame. Each resilient brace is a spacer between a pair of spaced-apart cutting blades. The braces support arbor and cutting blades. The rigid frame and the braces cooperate to strengthen, and to reduce translational motion of the arbor, while allowing rotation of the arbor. Each brace has a brace body, a brace tang extending therefrom, and a brace tab extending perpendicularly from the brace tang. Each brace tab is aligned with another along an edge of the rigid frame, the brace bodies are spacers between the cutting blades, and the brace tabs impair translational motion of the brace bodies. A paper shredder with a motor, gearing, and counterposing cutting assemblies has motion-limited resilient spacers adjacent to cutting blades.

Abstract: A device for producing an absorbent body includes crushers that are each configured to crush a supplied pulp sheet into fluff pulp and that each include a plurality of rotating blades, a duct in which the fluff pulp is carried by air, and a rotating fiber stacking drum that includes an adsorbent molding section that molds the fluff pulp carried by air from the duct into an absorbent body with a desired shape. Further, the crushers are staggered in an axis direction of the rotating blades.

Abstract: An apparatus for separating carbon or resin from slurry. The apparatus comprises a frame, a rotary cage screen assembly, a cage screen support and rotary drive system, a carbon collection assembly and a hopper moveably connected to the rotary cage screen assembly. The apparatus is positional partially within an adsorption tank or other container capable of containing slurry.

Abstract: A machine for removing the calyces from the seed of a sorrel bud includes a smooth surfaced return drum rotatably mounted to a frame and a cutting drum rotatable about a cutting drum axle and mounted to the frame in a tandem relationship with the return drum. The cutting drum has a plurality of circumferential blades oriented perpendicular to the cutting drum axle and are substantially equally spaced one from another. The cutting drum in combination with the return drum defines a throat therebetween for receiving sorrel buds. A drive simultaneously rotates the return drum and the cutting drum to cut calyces from the seed of the sorrel bud.

Abstract: A novel universal main feeder is described for cutting the large items into smaller items before they are fed into the feeder, hopper of the extruder. The sensor based control and the cutting device based resizing and quantity control enables a non-clog and smoother operation for recycling or waste management. The unique design of interchangeable cutting device enables the user to fit the pertinent cutting device blade, knives, shredders or hammer mills.

Abstract: Provided is a shredder that prevents particles from jamming in a shredding mechanism, and shreds the sheet-like objects into such an extremely small size that the sheet-like objects cannot be reproduced. A shredding mechanism (3) includes blade drums (4, 5) in a pair, and a plurality of scraping members (6) for scraping off particles (1a) formed by shredding from an inside of recessed portions located between the cutter portions (4b, 5b) of each of the blade drums (4, 5). A control device (12) includes a determination unit (13) for determining a jam condition of the particles (1a) in the shredding mechanism (3) based on a load applied to a drive device (10) during idling of the shredding mechanism (3), which is carried out by driving the drive device (10) under a state in which the sheet-like object (1) to be shredded is not conveyed in the shredding mechanism (3).

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: 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: The invention relates to a pureeing unit (1) for an apparatus for processing foodstuffs with at least one knife (31, 32) arranged radially to a rotation axis (2) and with at least one blade (41, 42) arranged radially to the rotation axis (2). The at least one knife (31, 32) and the at least one blade (41, 42) are rotatable about the rotation axis (2).

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: The present invention is an apparatus for trimming plants, in particular, buds and flowers, to remove unwanted plant material. A typical application would be to process a plant to leave only trimmed buds and flowers for use in potpourri, fragrant sashes, or as a prelude to further processing of essential oils. The apparatus employs a combination of a slotted metal drum and a lawn mower type cutting reel that are rotated in the same direction, but at different speeds, to create a cutting interface that shears off the unwanted plant material. The apparatus further employs a vacuum manifold to collect the debris and transfer it into a waste collection device.

Abstract: The present invention discloses an apparatus for trimming plants, in particular, buds and flowers, to remove unwanted plant material. A typical application would be to process a plant to leave only trimmed buds and flowers for use in potpourri, fragrant sashes, or as a prelude to further processing of essential oils. The invention enables faster and safer production of plant material than prior plant processing machines. The apparatus employs an original combination of a slotted metal drum and a lawn mower type cutting reel that are rotated in the same direction, but at different speeds, to create a cutting interface that shears the unwanted plant material off and then collect this debris though a novel vacuum manifold into a waste collection device. The cutting interface between the slotted drum and the cutting reel is adjustable to keep the distance between the two between 0.002 and 0.006 inches for a very sharp and clean cut.

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: A grinding machine cleaning system and method provides a range of human safe products that can easily be introduced into the grinding chamber and cycled through the equipment. Some of the products include corn cobs, walnut shells, pecan shells, nuts, rice, dried corn kernels, corn meal, barley, wheat, bulgur, and other grain, fiber, legume, nut, bark, and shell products in varying shapes and sizes. Organic products have largely been considered ideal. However, inorganic materials also may be used with equal effect.

Abstract: A cutting apparatus including a grinder assembly for grinding and sharpening the knives in the cutting assembly is disclosed. The cutting apparatus comprises, a mouth defined by a jaw assembly for delivering the material to be cut to a cutting position at the mouth, a cutting drum having at least one knife the, or each, knife having a cutting edge, the cutting drum having drive means therefor and being rotatable about an axis arranged substantially parallel to the mouth such that the cutting edge of the at least one knife is arranged substantially perpendicular to the material to be cut.

Abstract: A grinding machine cleaning system and method provides a range of human safe products that can easily be introduced into the grinding chamber and cycled through the equipment. Some of the products include corn cobs, walnut shells, pecan shells, nuts, rice, dried corn kernels, corn meal, barley, wheat, bulgur, and other grain, fiber, legume, nut, bark, and shell products in varying shapes and sizes. Organic products have largely been considered ideal. However, inorganic materials also my be used with equal effect.

Abstract: A device for comminuting scrappable feedstock by way of cutting or shear-cutting is provided that includes at least one rotor situated within a housing. The rotor has a plurality of rotary disks which are situated at an axial distance from each other, forming spaces, and which are fitted on their circumferences with comminuting tools which interact with additional comminuting tools to perform the comminution work. Stationary scraping elements extend into the spaces in the radial direction. To achieve a largely unhindered flow of stock through the device, it is proposed according to the invention to situate the stationary scraping elements in the dead zone of the at least one rotor with regard to the direction of stock flow.

Abstract: Disclosed herein is a shredder having a rotatable device located adjacent an output opening of the shredder housing. The rotatable device includes a shaft configured to rotate about an axis parallel to an axis of the cutting assembly so as to allow for rotation of the device. The rotatable device has a plurality of fingers extending at least partially radially with respect to an axis of the shaft. The rotatable device is able to rotate about the shaft axis in either direction, so as to disperse any accumulation of shredded materials in the waste bin, as well as remove shredded materials caught in or near the cutting assembly within and adjacent the output opening.

Abstract: Disclosed herein is a shredder having a rotatable device located at least partially between a shredder mechanism and a bottom of an output opening of the shredder housing. The rotatable device includes a shaft configured to rotate about an axis parallel to an axis of the cutting assembly so as to allow for rotation of the device. The rotatable device has a plurality of fingers or fins extending at least partially radially from the shaft. The rotatable device is able to rotate about the shaft axis in either direction, so as to disperse any accumulation of shredded materials in the waste bin, as well as remove shredded materials caught in or near the cutting assembly within and adjacent the output opening.

Abstract: The subject application is directed to a food processing device to extract juice. The device includes an inlet coupled to a disintegrator. The inlet is configured to accept food items and the disintegrator configured to disintegrate food items passed through the inlet. The device further includes a separator that accepts the disintegrated food items and separates out the liquid components from the food item. The device further includes a reservoir that is coupled to the separator for accepting and holding the liquid components. The reservoir includes a translucent member for viewing of liquid levels within the reservoir, and a valved outlet. The valved outlet is configured to allow or prevent the flow of liquid from the reservoir through the valved outlet.

Abstract: The invention discloses a system for processing bone product comprising at least a mincer and a comminuter (10), a method to operate such a system and a comminuter (10) for use in such a system and method.

Abstract: A shredder head adapted to shred data bearing documents and/or bottles.

Abstract: A self cleaning cutting assembly is provided, having an array of counter rotating cutters in which a plurality of cutters rotating in a first direction are mounted on a first shaft and a plurality of second cutters are mounted on a second shaft for rotating in an opposite direction. The array of cutters is provided with a plurality of clearing or cleaning rings located alternately with the cutters on each shaft. The cutting array is kept clear of debris or partially cut material by movement of the clearing or cutting rings against adjacent cutters. Movement of the clearing or cleaning rings is a combination of rotary motion and linear motion, in which the linear motion is imparted by the cutter located opposite the cleaning ring striking the cleaning rings so as to push the cleaning ring beyond the position of the widest part of the cutter to completely dislodge material from the cutter.

Abstract: A comminution apparatus for reducing a particle size of a material includes a cutting chamber defining an interior volume, wherein the cutting chamber includes first and second member forming an angle therebetween. Each of the first and second members include a plurality of slots therethrough providing access to the interior volume. The apparatus further includes a rotatable arbor disposed outside the interior volume of the cutting chamber and supporting a plurality of toothed blades thereon. During rotation of the arbor a portion of each of the blades enters an interior volume of the cutting chamber through the slots in the first member and exits the interior volume of the cutting chamber through the slots in the second member. The comminution apparatus may be used to process various feed materials to desired sizes, and is particularly useful for reducing the size of materials otherwise difficult to cut to small size.

Abstract: A hand-held device for shredding paper comprising a pair of rotary cutting wheels disposed within a housing between an inlet slot and an outlet slot. A motor is positioned in the handle to drive the cutting wheels through a gear assembly. One wheel serves as a drive wheel, which is coupled directly to the gear assembly, and the other wheel serves as an idler, driven from a spur gear attached to the drive wheel at the end opposite a gear case. Paper sheets are fed into the inlet slot and pulled between the wheels. Wheels are comprised of a stack of alternating discs of a large and small radius, and staggered so as to allow the two wheels to be interleaved while rotating in opposite (clockwise and counterclockwise) directions and maintain clearance. Large discs have a frictional edge to grab and feed the paper into the intersection of the wheels, tearing the paper into strips and forcing the strips into the outlet slot. A battery compartment in the handle contains the batteries for energizing the motor.

Abstract: An object of the present invention is to diminish the sizes of most disintegrated material effectively, said sizes being determined by the box seats made on the surface of the under roll (7). In a disintegrator (1) having a case (4) with an upper hopper 2 and under exit (3), a pair of upper rolls (5, 6), an under roll (7) located below the upper rolls, and knives (8,9) projecting from inner surface of the case (4) toward the under roll (7) comprising a number of annular grooves (25) formed on the under roll (7), each groove (25) being coupled by a rotative disk cutter (27) at under side of the knives (8, 9). The under roll (7) is provided with polygonal installation seats (13), between adjoining installation seats (13) each attached by a number of cutting edge blocks (14) on a same circumference, said annular grooves (25) are formed between the adjoining installation seats (13).

Abstract: Apparatus (2) for crushing glass or ceramic material, which apparatus (2) comprises a rotor (4), rotor blades (6) on the rotor (4), at least one stationary blade (8) which cooperates in use with the rotor blades (6) as the rotor (4) rotates, and a chamber (16) for receiving crushed glass or ceramic material (18), the apparatus (2) being such that the rotor (4) is upstream of the chamber (16), the glass or ceramic material (18) is first broken into fragments (20) on impact with the rotor (4), the fragments (20) are reduced in size and formed into cullet (22) by passing through a gap (24) between the rotor blades (6) and the stationary blade (8), and the action of the rotor blades (6) and the stationary blade (8) causes the cullet (22) to be such that it will not cut, is safe for handling, and is suitable for further use without further processing.

Abstract: A comminuting apparatus including a filtering screen member for collecting solids carried by an effluent stream. The filtering screen member has an upstream side and a downstream side. The comminutor apparatus further includes a twin shaft grinder for grinding solids contained in the effluent stream and for cleaning the filtering screen member of solids collected thereon. The comminutor apparatus also includes a mounting member in the form of frame-like structure for mounting the twin shaft grinder at a spaced apart distance from the upstream side of the filtering screen member. Additionally, the comminutor apparatus includes a moving device in the form of a drive motor for moving the twin shaft grinder past the upstream side of the filtering screen member such that the twin shaft grinder is continuously spaced from the filtering screen member during the movement of the twin shaft grinder.

Abstract: The machine comprises a front door, a roll cover having a main roll cover and a feed roll cover, a first fulcrum axis between the main and feed roll covers, and a second fulcrum axis between the feed roll cover and a frame. The front door has a hinge at the upper portion so that it is kept at a self-supporting state when opened. The main roll cover is foldable on the feed roll cover about the first fulcrum axis. The feed roll cover is swung upwardly about the second fulcrum axis and is finally kept at the self-supporting state with the main roll cover folded on the feed roll cover. Where the front door and the roll cover are kept in their self-supporting states, since a pair of rolls and a stock feeder are fully exposed, the remaining stock accumulated in the machine can be removed easily.

Abstract: An apparatus for wiredrawing vegetables or cutting them into three dimensional shapes, comprising a base frame, a first container supported by said base frame for collecting residues, a drum mounted for rotation about an axis on the surface of die cells, a vegetable feeding means supported on said base frame and arranged above said drum to adjustably feed vegetables into said cutting means, pressing means located downstream of said feeding means with respect to the direction of rotation of said drum, and designed to wiredrawing said vegetables into said die cells, clearing means arranged downstream of said pressing means and designed to force out into said pressing drum any wiredrawn vegetables held in said die cells, and a second container supported by said frame underneath said drum and arranged to receive wiredrawn vegetables present in said drum.

Abstract: A comminuting apparatus includes a frame, a set of overlapping scissor rolls, a first drive motor, and a second drive motor. The frame has an enclosure with an entrance opening for receiving waste material. The set of overlapping scissor rolls is carried within the enclosure for rotation, including a first scissor roll and a second scissor roll. The first drive motor is coupled to the first scissor roll, and the second drive motor is coupled to the second scissor roll. The first drive motor is operative to drive the first scissor roll at a substantially variable operating speed. The second drive motor is operative to drive the second scissor roll in co-rotation at a substantially constant operating speed.

Abstract: An apparatus for cutting a food product is disclosed including a stationary structure with a food product guide surface for guiding a food product along a path of travel, the apparatus having a knife wheel rotatable about a knife wheel axis, the knife wheel having at least one knife blade and located such that rotation of the knife wheel about the knife wheel axis causes the knife blade to cut through the food product as it moves along the path of travel. The apparatus also includes a knife wheel support which rotatably supports the knife wheel, the knife wheel support being pivotally attached to the stationary structure so as to pivot about a pivot axis extending substantially parallel to the knife wheel axis, such that the knife wheel axis is movable along an arcuate path about the pivot axis.

Abstract: Industrial shredders containing a novel shredding head and novel stripper blades to prevent or reduce the possibility of jamming the shredder during operation. The Industrial shredder requires the use of a stripper blade which is removable and replaceable without the use of tools, or without having to tear down the shredder. The shredders are typically used to reduce industrial solid waste such as cardboard, rubber, metal, plastics, paper, and the like to small particles or pieces.

Abstract: A process for saline-solution soluble xanthan gum which comprises the steps of precipitating xanthan gum by mixing, with stirring, an aqueous solution of xanthan gum with an organic solvent which is a non-solvent to xanthan gum but is hydrophilic, removing liquid from the precipitated xanthan gum to a liquid content of at most 50%, disintegrating the cake of xanthan gum after the liquid removal to an average grain size of from 0.3 to 2 cm in diameter, and drying the disintegrated xanthan gum by fluidizing the same at a temperature not exceeding 80° C.

Abstract: Disclosed is an improved structure for a paper shredder in a waste paper disposer formed of one piece design composed of a hanging portion, and a shredder body with a plurality of scrapping elements and guiding slots. The structure is divided in two parts, provided respectively at the front and rear sides of a cutter assembly. During operation of the paper shredder, the paper shreds are removed from the cutter assembly by the scrapping elements of the shredder body thereby preventing the paper scraps from sticking on the cutter surfaces. Paper scraps sticking on the cutter blades are removed by barrier tips on the upper ends of the guide slots. When the paper shredder is reversely revolved, the remaining paper shreds on the cutter are removed by the barrier tails formed at the bottom portion of the shredder and the guide slots.

Abstract: A scraper assembly for use with an associated coal pulverizer or as part of a coal pulverizer having a vertical axis with a central hub that rotates during normal operation of the pulverizer. The scraper assembly includes a bracket dimensioned and configured for attachment to the hub of the coal pulverizer that rotates in the normal operation of the coal pulverizer. The apparatus also includes a shaft extending from the bracket. The shaft is substantially horizontal and the apparatus also includes a scraping element pivotally mounted on the shaft. A torsion spring biases the scraping element with respect to the shaft. In some forms of the invention the scraping element comprises a first and second journals engaging the shaft at axially spaced points and the scraping element further includes first and second arms extending radially away from the shaft that are respectively fixed to the first and second journals.

Abstract: A paper shredder, particularly a small paper shredder, includes a shell-like lower housing part which includes the cutting rollers with their bearing plates at the end faces and the stripping elements, and an upper housing part which is provided with a material inlet slot and can be placed on the lower housing part. The bearing plate on the drive side for the cutting rollers simultaneously forms the single-piece bottom of an also shell-like gear housing which can be closed by means of a cover. The entire cutting mechanism including gear housing, cutting rollers and stripping elements is mounted in the area of the bearing plates on the end faces through vibration-damping elements in the lower housing part.

Abstract: A desktop paper shredder including a housing in which a pair of shafts are rotationally mounted. The housing is provided with an entrance that corresponds to and is aligned with the shafts. A paper trash container is removably disposed at the lower portion of the housing. The shafts are driven by a driving device and meshed with each other such that their rotations are opposite to each other. Each shaft is further provided with a spiral groove in which a plurality of sets of shredding blades are disposed therein. Each of the sets of shredding blades is spaced from the next set of shredding blades by a spacing collar on which is provided a paper trash stopper. The external end portion of each paper trash stopper is fixedly attached to the configuring tab within the housing. The perimeter of each shredding blade is further provided with a plurality of knives. Each shredding blade is further provided with a projecting tab that rests in a selected spiral groove.

Abstract: A support integral with a housing for a paper shredder having a plurality of cutting cylinders with cutting shafts. The support has at least one rib extending outward from at least one wall of the housing toward the cutting shafts of the cutting cylinders.

Abstract: A volume reduction machine for crushing beverage containers has a pair of feed rolls and a pair of crusher rolls. The feed rolls in spaced relationship to a feed plate, urge containers to be crushed, while puncturing them. The feed rolls comprise a plurality of spaced feed discs and are aligned to overlap to ensure self cleaning. The crusher rolls comprise a plurality of closely-spaced discs. Spaces between discs slightly exceeding the thickness of the disc. The crusher rolls are offset such that the discs of one roll align with the spaces between discs of the other roll. The crusher rolls have an adjustable gap and are aligned with a lower edge of the feed plate. The discs forming the crusher rolls include circumferential notches of a given size and shape to deform plastic beverage containers beyond their modulus of elasticity thereby overcoming the problem of such containers springing back after crushing. An oscillating horizontal bar provides a debridging dejamming feature to the machine.

Abstract: A multiplicity of teeth are mounted to a beam in a comb structure, with the space between the teeth defining slots. The edges of the slots are lined with upstanding flanges which are sharpened to form cutting edges. The comb structure is arranged to be substantially parallel to an array of bag breaking bars. The bars interdigitate with the teeth and thus pass through the narrow openings between the teeth where the knife edges scrape the bars, thereby cutting free any material adhering to or impaled upon the bag breaking bars. Alternatively, an apparatus for cleaning a bag breaker has a pivotally mounted are having a fork which is aligned to receive a bar between the tines of the fork. The fork engages the base of the bar and then proceeds to slide up the bar as the forward motion of the bar causes the arm to pivot. In this way, material impaled upon a bar is slid or scraped upwardly towards the top of the bar.

Abstract: The comminution of solid materials, such as stumps and wood waste, into particulate form is accomplished by introducing the material to be comminuted into a tub. The tub is rotated to induce a circular motion to the material. Simultaneously, a disk positioned at the bottom of the tub is rotated, preferably in the opposite direction to the tub, in a plane parallel to the tub bottom. The disk has teeth thereon that impact the material in the tub. A screening means at the bottom of the tub is sized to keep the material in the tub until it reaches a desired particle size, at which time the particles can leave the tub through the screening means and enter a collection chamber. The particles are removed from the collection chamber by being entrained in an airstream that passes adjacent an opening in the collection chamber. Preferably, the teeth in the disk are individually replaceable and are symmetric so that once one side is worn the tooth can be reversed in its mount and used again.