Abstract: Disclosed is a grinding roller for waste tires and a multifunctional crusher having the grinding roller. The grinding roller comprises a roll shaft and a plurality of grinding components. The grinding components each comprise a grinding frame and grinding blocks mounted in grooves of the grinding frame. Each grinding block has a grinding surface that protrudes with respect to the grooves. Axial interval adjusting rings are disposed on the ring shaft for separating the grinding components at a predetermined distance to cut waste tires into blocks. The crusher comprises a box for housing the grinding roller. The box is provided with a material inlet and a material outlet. Axial blockers are mounted on the crusher to help grind waste tires into fine powder.

Abstract: An animal slurry macerator (1) comprising a housing (2), a slurry chamber (3) in the housing (2) for receiving slurry from a slurry inlet (6) on the housing (2), a rotatable cutting plunger (4) in the slurry chamber (3) for macerating slurry, and a plurality of slurry outlets (7) on the housing (2) for discharging macerated slurry from the slurry chamber (3) wherein the slurry outlets (7) are provided with air-valves (8) at the housing (2) to facilitate air flow through the slurry outlet (7).

Abstract: Processes and systems for commercial scale milling of wheat are disclosed. Processes include multiple tempering steps of controlled duration and cubing of the wheat kernel between two tempering steps. The cubing between the tempering breaks the kernels, or stresses the kernels, in a manner that enables a high degree of separation of the bran and endosperm early in the flour production process. An embodiment includes tempering for a first period between hour and 2 hours, cubing in a roll crusher with longitudinal corrugations on one roll and circumferential corrugations on a second roll, removing fines from the cubed kernels, and further tempering of the cubed kernels for a period between hour and 2 hours.

Abstract: To produce flour and/or semolina, raw material is fed into a feed opening of a roller press. The milling gap of the roller press is fixed, or damping of at least one of the rollers with respect to the lateral deflection is set, such that a first subset of the fill containing finer milling material forms a packed particle fill in the milling gap. In addition, the setting is carried out in such a way that individual particles of a second subset of the fill containing coarser milling material are in contact with the first roller and the second roller of the roller press. Subsequently, the bulk material is milled into milled product in the roller press (9) and the milled product is discharged through a discharge opening.

Abstract: The invention relates to the production of superabsorbent polymers on a continuous belt reactor, comprising at least one rotating knife that cuts the formed polymer gel at the end of the continuous belt reactor, wherein the length of the cutting edge is at least 1 cm and the cutting edge is non-parallel to the rotation axis.

Abstract: A system and method for producing a feed product, and the product, are disclosed. A processor apparatus may comprise a housing and at least two generally cylindrical rolls rotatably mounted on the housing, with a gap being formed between the rolls through which the path of the crop materials passes. At least one roll may have alternating longitudinal ridges and grooves forming teeth on the surface of the roll. A rotating assembly may be configured to rotate the rolls with respect to the housing, the rotating assembly being configured to rotate the pair of rolls at different rotational speeds. A method may comprise cutting plants growing in a field, chopping the plants of the crop materials in a manner to produce pieces of the plants that have lengths of approximately 1 inch to approximately 2.5 inches long, and processing the plant pieces between the rolls rotating at a speed differential of at least 10 percent.

Abstract: The present disclosure is generally related to an apparatus having cutter elements for destroying articles such as paper sheets and a mechanism for separating at least a sheet from a stack in a tray. A paper feed mechanism feeds paper that is separated from the stack by a stack separation mechanism to the cutter elements. The feed and separation mechanisms can be activated by rotation of the cutter elements. In one embodiment, the stack separation mechanism moves in an alternating manner between retracted and extended positions to disengage and engage and insert the stack to separate (with its edge) paper therefrom to feed to the feed mechanism for shredding. The paper stack separation mechanism can move in an non-undulating manner relative to the stack. A device for stripping stapled pages, a pivotable support plate, and pressure plate can also be used, as well as a number of sensors.

Abstract: An apparatus for fracturing in which: a fracturing tooth is formed so as to have a larger base part than a top end; a fixing cover is formed along a longitudinal direction of rolls and is provided with fixing holes for fracturing teeth arranged along the longitudinal direction, expanded parts which are formed by expanding both sides of the fixing holes, and an indented part which is formed by narrowing a part between the fixing holes with respect to the expanded parts; the base part of the fracturing tooth is held between the roll and the fixing cover fixed on the roll and the indented part and the expanded part of the adjacent fixing cover are engaged with each other in fracturing teeth unit, so that the fracturing teeth are arranged in a staggered manner.

Abstract: A method for producing fractured fragments of polycrystalline silicon having a fracturing process fracturing fragments of polycrystalline silicon between a pair of rolls which are rotated in a counter direction each other around parallel axes, in which: the rolls have a plurality of fracturing teeth protruding radially-outwardly from outer peripheral surfaces thereof; the fracturing teeth have spherical top surfaces and conical or cylindrical side surfaces; the fracturing process is performed in fracturing ratio of equal to or more than 1.0 to less than 1.5, and the fracturing ratio is specified by a maximum length of polycrystalline silicon before fracturing with respect to a facing distance between the top surfaces of the fracturing teeth at a facing part of the rolls.

Abstract: A grinding assembly for the comminution of material that enhances the durability of the side edges of both a grinding roll and a flange roll. Both the grinding roll and the flange roll include a wear ring that is received within a side groove formed at each end of a cylindrical roll body. The wear ring includes a series of spaced receiving cavities that each receive a wear member. Each wear member includes a radially outer surface and an axial end face to enhance the durability of the edge of the roll body. The edge ring is retained on the roll body by a series of connectors that pass through the edge ring. In the flange roll design, a flange ring is attached to the roll body by a series of connectors that also secure the edge ring to the roll body.

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 disclosure relates to a roller crusher having two generally parallel rollers arranged to rotate in opposite directions, towards each other, and separated by a gap, each roller having a first end and a second end. The roller crusher includes a flange attached to at least one of the ends of one of the rollers. The flange extends in a radial direction of the roller, and has a height above an outer surface of the roller which is sufficient to extend across the gap substantially along a nip angle of the roller crusher. A feeding structure is formed on the flange and extends in an axial direction of the roller to engage material toward the gap.

Abstract: The present invention relates to a roller mill for coffee, a method for grinding coffee, and an application of grinding rollers for grinding coffee. In order to grind coffee, conventionally metal rollers are used which are subject to heavy wear and adversely affect the taste of the coffee. The object of the invention is to provide a roller mill for coffee, a method of grinding coffee and a corresponding application thereof that avoids these disadvantages. This is achieved by means of a roller mill for coffee with grinding rollers in opposite directions and having granite surfaces at a peripheral velocity ratio of the rollers 1:1.5 to 1.4, and by means of a corresponding application and corresponding method.

Abstract: Apparatus, system and methods of using the apparatus and system to manipulate fiber(s) into a chopper, winder or other fiber(s) processing equipment. By using the apparatus the operator(s) are freed up for pressing duties that will increase productivity and also create a safer workplace. The apparatus supports and constrains slowly or rapidly running fiber(s) and moves through a sequence of movements that reposition the fiber(s) into a path that places the running fiber(s) in the proper location for processing in the chopper, winder or other processing equipment and also places the running fiber(s) into a desired groove or valley on a separator roll or guide.

Abstract: A stream of ground particles is characterized by irradiating it with electromagnetic radiation and detecting electromagnetic radiation emitted from the irradiated particles. The detecting system includes an imaging system and a color image sensor for imaging the particles by way of the electromagnetic radiation emitted by the particles. The color image sensor has sensor image elements for spectrally selective detection of the electromagnetic radiation.

Abstract: A roller press, in particular for processing highly abrasive materials, includes at least two press rollers, each of which is provided with a wear protection layer arranged on a base body. The wear protection layer includes plate-shaped and pin-shaped wear resistant material elements. The plate-shaped, wear resistant material elements are applied to surfaces of two opposed edge areas of each base body by sintering with or without pressure, preferably by a hot isostatic pressing operation. The pin-shaped wear resistant material elements are arranged in a central section of each base body extending between the edge areas. A method of producing a wear protection layer, in particular for a press roller, is also provided.

Abstract: The grinding roller of a roller mill according to the invention consists essentially of a roller shaft, a main roller body and an external wear ring having a wear protection, wherein the connection between the roller shaft and the main roller body is formed by a shrink fit. The main roller body is formed by at least two coaxially arranged intermediate rings.

Abstract: An apparatus for fracturing polycrystalline silicon having: a pair of rolls which are rotated in a counter direction each other around parallel axes; a plurality of fracturing teeth which are provided on and protruded radially-outwardly from outer peripheral surfaces of the rolls, and are made from cemented carbide or silicon material; and resin covers being wound around the roll in a state in which the fracturing teeth penetrate thereof so as to cover the outer peripheral surfaces of the rolls, and fractures fragments of polycrystalline silicon between the rolls.

Abstract: An apparatus for fracturing polycrystalline silicon having a pair of rolls which are rotated in a counter direction each other around parallel axes, the rolls is provided with: a plurality of disks layered along the axes of the rolls; and a plurality of fracturing teeth protruding radially-outwardly from the disks with a certain intervals along a peripheral direction of the disks, wherein the disks are rotated at different rotation speed from an adjacent disks, and the apparatus fracturing fragments of polycrystalline silicon between the rolls.

Abstract: An apparatus for fracturing in which: a fracturing tooth is formed so as to have a larger base part than a top end; a fixing cover is formed along a longitudinal direction of rolls and is provided with fixing holes for fracturing teeth arranged along the longitudinal direction, expanded parts which are formed by expanding both sides of the fixing holes, and an indented part which is formed by narrowing a part between the fixing holes with respect to the expanded parts; the base part of the fracturing tooth is held between the roll and the fixing cover fixed on the roll and the indented part and the expanded part of the adjacent fixing cover are engaged with each other in fracturing teeth unit, so that the fracturing teeth are arranged in a staggered manner.

Abstract: An article in the form of one of a plate, a sheet, a cylinder, and a portion of a cylinder, which is adapted for use as at least a portion of a wear resistant working surface of a roll is disclosed. The article includes a metal matrix composite comprising a plurality of inorganic particles dispersed in a matrix material. The matrix material includes at least one of a metal and a metal alloy, wherein the melting temperature of the inorganic particles is greater than the melting temperature of the matrix material. A plurality of hard elements are embedded in the metal matrix composite. The wear resistance of the metal matrix composite is less than the wear resistance of the hard elements, and the metal matrix composite preferentially wears away when the article is in use, thereby providing or preserving gaps between each of the plurality of hard elements at a working surface of the article.

Abstract: In the coarse and fine grinding of mineral and non-mineral materials, e.g. limestone, cement clinker, blast-furnace slag, old concrete or ashes, the grinding material, usually including new and recirculated stock, is fed as a defined and laterally bounded material layer (4) of predetermined thickness from a material feed container (3), belonging to the comminuting apparatus, by way of a roller-type or rotary-vane feeder (9), which is arranged at the outlet and can be changed in a stepless manner in respect of its rotational speed, onto the vertex of the laterally rimmed (45), driven, bottom roller (1), accelerated to the roller speed and transported continuously into the gap formed (5) with the upper roller (2), arranged in an offset manner above the driven roller (1), is subjected to hydropneumatic loading using specific compressive forces of 2 to 7.5 kN/mm and is then deagglomerated within the comminuting apparatus by a preferably high-speed rotary crusher (10).

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: The aim of the invention is to provide a roll crusher for a grate cooler for cooling hot bulk material, in particular hot cement clinker, comprising several parallel crusher rolls. Said rolls are driven in opposite directions and comprise respective rotatably mounted axle tube rolls, onto each of which a large number of crusher rings that can be connected to the axle tube can be pushed. According to the invention, the crusher rings are configured in such a way that crusher elements project from the cylindrical outer face of the crusher rings, said elements being uniformly distributed both over the periphery and over the width of the crusher rings.

Abstract: An improved active grate consisting of at least two elongated rockers positioned parallel to one and another, each rocker having a lower surface and an upper surface and configured to rotate back and forth about their longitudinal axis. Each individual rocker is further configured to rotate in the opposite direction of the adjacent rockers such that any pair of adjacent rockers alternately forms a void allowing material to pass through active grate when rotating in one direction into a first position, and closes the void when rotated in the opposite direction in a second position. The active grate finds particular utility in a combined gasification/vitrification waste treatment system, where it is used to pass partially oxidized materials from a gasification chamber to a vitrification chamber. The rockers include a coolant loop through the longitudinal axis of the rockers.

Abstract: A multiple roll crusher is provided for crushing of mineral material, more particularly of coal or oil sand. The multiple roll crusher includes at least three crusher rolls (1, 2, 5 1?, 2?), the rotation axes (R) of which lie in parallel to each other and horizontal or roughly horizontal. All directly neighboring crusher rolls (1, 2, 1?, 2?) have opposite directions of rotation. A connecting line (V) of the rotation axes (R) has at least one kink.

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. The inlet end is configured to receive the bag of compressed blowing wool. A shredding chamber is positioned downstream from the chute and is configured to shred and pick apart the blowing wool. The shredding chamber includes a plurality of shredders configured for rotation. The shredding chamber further includes a plurality of guide shells positioned partially around the plurality of shredders. The plurality of shredders seal against the plurality of guide shells and direct the blowing wool in a downstream direction as the plurality of shredders rotate.

Abstract: A hogger and reducing apparatus and considers issues associated with fibrous other materials clogging screening apertures A paddle arrangement having an open framework rotates relative to the screening apertures provided on a drum. Either or both the paddle arrangement and drum may rotate, the resultant action increasing agitation of raw material (being reduced in size by a reducing means) in the vicinity of the screening apertures and also providing a wiping type effect to help clear material from within the apertures.

Abstract: An apparatus and method for using the apparatus is taught for decreasing the density of and feeding into a convention small baler agricultural crop product that has been compressed into several flakes, the flakes having been then further compressed into a large bale, the apparatus comprising a material bed and pusher assembly; a staging area; a set of feeder rollers; a set of drawing rollers; a metering assembly; a chaff discharge system; and a small baler. A method of using the apparatus is also taught. Baled agricultural crop product that is passed through the taught apparatus and method indistinguishably resembles agricultural crop product that has never been baled.

Abstract: A method and apparatus for separating long, unwound items like fiber, fiber strands, yarn, etc. into short lengths is disclosed. The apparatus has a backup roll, a blade roll that uses novel dummy blade slot fillers between each pair of chopping blades on the blade roll to eliminate or substantially reduce vibration normally encountered when making longer chopped lengths of chopped product.

Abstract: A method and apparatus for separating long, unwound items like fiber, fiber strands, yarn, etc. into short lengths is disclosed. The apparatus has a backup roll, a blade roll that uses novel dummy blade slot fillers between each pair of chopping blades on the blade roll to eliminate or substantially reduce vibration normally encountered when making longer chopped lengths of chopped product.

Abstract: A device for comminuting a residual sheet metal grid includes a grid supply system defining a grid supply plane and supplying the grid in a longitudinal direction; and a cutting assembly including a plurality of shearing teeth extending along a transverse direction transverse to the longitudinal direction. The shearing teeth can include a cutting edge, a cutting edge portion, or both a cutting edge and a cutting edge portion. The cutting assembly can be constructed and arranged to cut the metal grid along the longitudinal direction and the transverse direction.

Abstract: The present invention relates to a material processing apparatus. The apparatus includes a frame including a pair of laterally opposed parallel sides and a base, and at least a first pair of substantially cylindrical material processing rolling assemblies, wherein each pair of rolling assemblies are driven by a hydraulic drive motor assembly, such that using the hydraulic drive motors, the rolling assemblies can be driven at a variable friction ratio.

Abstract: Compacting device for the low-metal compaction of a powder with a casing which at least in part surrounds a working chamber, with a feed arrangement arranged on the casing and feeding a powder, which is to be compacted, into the working chamber, with at least a compacting roller which is rotatably arranged in the working chamber, comprises a roller jacket and, together with an opposing wall, forms a compacting gap for compacting the powder therein, characterised in that the at least one compacting roller consists of ceramic, at least on the roller jacket.

Abstract: A mixing system and method for manufacturing a thermal interface material are disclosed. The mixing system mainly includes a mixing chamber having a bottom portion, a first inlet, a second inlet, a spray nozzle, and an outlet. The first inlet is defined in the bottom portion and is configured for inflating a gas into the mixing chamber to form a gas vortex. The second inlet is defined in the mixing chamber and is configured for supplying a plurality of powdery thermally conductive particles to the gas vortex. The spray nozzle is disposed essentially facing the first inlet and is configured for spraying a liquid curable matrix material towards the gas vortex to admix the matrix material and the particles. The outlet is disposed adjacent the gas vortex and is configured for discharging the admixed matrix and particles from the mixing chamber.

Abstract: Polysilicon is crushed with a minimum of manual and machine crushing steps by utilizing a large diameter roll crusher, the circumferential crushing surface of which is formed of a plurality of reversibly mounted, close fitting hard metal plates. Reproducible crushing along with such low metal contamination that subsequent cleaning of the crushed polysilicon is not necessary are both obtained.

Abstract: A method and apparatus for chopping long unwound items like fiber, fiber strands, yarn, etc. having an idler roll for pressing the item(s) against a backup roll for pulling the item(s) into the chopper, the idler roll being an assembly allowing the idler roll to pivot around a pin inside the idler roll assembly to keep the surface of the idler roll in proper contact with the items being chopped.

Abstract: An annular casing for the press rollers of roller presses for the pressure comminution of particulate material, the outer surface of which casing always has a high degree of hardness and consequently a high wear-resisting capability, but the radially inner region of which casing has a lower degree of hardness to avoid casing ruptures, it is proposed according to the invention that the material of the casing consists of nodular cast iron with at least the alloying elements Ni and Mo and with a bainitic structure with residual austenite, and in that, to achieve a self-hardening surface, the boundary layer of the annular casing—contains martensite, which is constantly renewed by external pressure loading of the casing surface when the press roller is in operation.

Abstract: The invention concerns a device for pruning and shredding plants. It comprises a shredding head (1) arranged at the end of a steerable arm itself borne by a tractor machine adapted to move along the plants to be treated, the head comprising a housing (10) including two parallel end plates (11, 12) between which are mounted two juxtaposed rotors (13, 14) with parallel axes, equipped with radial blades (15) and adapted to be driven in rotation in opposite directions (F, R), such that the blades (15) of said rotors (13, 14) move in the space (16) which separates said rotors (13, 14) and drive therein the plants to be cut and shredded.

Abstract: When a printing paper to which an IC chip storing secret information is attached is discarded, a shredder applied voltage to the IC chip by a discharging unit to destroy the IC chip and to make it impossible to read the secret information therefrom. Thereafter, a shredding cutter shreds the printing paper and the shred printing paper is discarded.

Abstract: The aim of the invention is to create a compact circulating grinding plant comprising a product bed comminution roller mill or roller press and a sifter device, in which the problem of mechanically transporting the grinding product that is directed through the circuit is minimized. Said aim is achieved by a circulating grinding plant in which a static cascade sifter is disposed below the gap of the roller press while a subsequent sifter, particularly a dynamic rod basket sifter, is disposed above said roller press. The sifting product discharge area of the static cascade sifter is connected to the sifting air and sifting product inlet of the subsequent sifter via an ascending duct which pneumatically conveys the product.

Abstract: A crushing machine comprises a pair of crushing rolls which are designed to be rotatable towards each other and away from each other. A side plate is provided on the outside of each roll. The crushing rolls have teeth which are shorter than conventional crushing teeth. The teeth on each roll are aligned with each other to provide cavities in which the crushing can occur. Rotation of the crushing rolls towards each other provides a centre sizing action to crush material (e.g. coal) into a larger particle size. Rotation of the crushing rolls away from each other provides a side sizing action to crush material between the roll and the side plates to a smaller particle size. Thus, the machine can crush material into two distinctly different particle sizes without any modification being required to the machine, the dual sizing occurring by reversing the rotation of the rolls.

Abstract: A rolling mill system has oppositely driven, temperature-controlled first and second rolls, each having a first roll half with a first end face, a second roll half with a second end face, and a roll center. The first roll has a peripheral surface with open grooves arranged on the first and second roll halves and with ribs between the grooves. The grooves of the roll halves are arranged opposed to one another at an obtuse angle and symmetrically to the roll center. The width of the ribs is smaller than the width of the grooves. The grooves extend continuously between the end faces. The second roll has a smooth peripheral surface. First and second cutting devices are arranged at the first and second end faces of the first roll, respectively. The cutting devices are arranged near open ends of the grooves.

Abstract: In an ice storage (10, 12, 14, 16) the aim is to ensure that ice is chipped off that surface of the ice mass in the storage, which stems from the water which froze to ice first. Likewise, efficient discharging of chipped-off ice to external conveyor devices (23) is ensured. This is achieved by means of a particular ice storage floor construction (16) consisting of parallel, elongate, tubular elements (18) placed with intermediate slots. The floor elements (18) carry carriers (20) in the form of strip-like ice-chipping elements, and the tubular floor elements (18) are supported individually rotational and are preferably driven collectively. The ice-chipping elements may alternatively be formed through the cornered cross-sectional shape of the floor elements, which provide distinct, longitudinal edge portions of good chipping and carrying properties.

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: A dual arbor scrap chopper is disclosed having a number of chopper blades attached to each arbor. The blades are designed to be more easily fitted into a blade recess formed on the arbor, and are preferably designed to provide a blade cutting surface which more closely resembles the optimal elliptical shape without the need for complex cutting patterns. A dual arbor scrap chopper with improved blade performance and ease of blade change-over is provided.

Abstract: A used-can processing system includes a shredder for cutting a used drum can, and a pelletizer for pelletizing cut pieces of the used can. The shredder includes a pair of rotary blade units which rotate with their blades meshing each other so as to cut a used drum can thrown from above the shredder, and a pair of auxiliary rotary blade units which face the respective rotary blade units and rotate in the same direction as do the corresponding rotary blade units, to thereby urge the used drum can toward the pair of rotary blade units. Each of the blades of the rotary blade units and the auxiliary rotary blade units has projecting portions and depressed portions formed alternately along the circumferential direction. Moreover, a screen having cut-pieces removal holes is disposed below and along the pair of rotary blade units and the pair of auxiliary rotary blade units.

Abstract: A cutting mechanism (108) for shredding waste has a planetary gearbox which carries four cutting heads (109) that are in close proximity to one another. The cutting heads (109) are rotated in the same direction by the gearbox (110) so that at a shredding zone between opposed portions of adjacent cutting heads (109), the opposed portions are moving in opposite directions.

Abstract: A rolling mill system has oppositely driven, temperature-controlled first and second rolls, each having a first roll half with a first end face, a second roll half with a second end face, and a roll center. The first roll has a peripheral surface with open grooves arranged on the first and second roll halves and with ribs between the grooves. The grooves of the roll halves are arranged opposed to one another at an obtuse angle and symmetrically to the roll center. The width of the ribs is smaller than the width of the grooves. The grooves extend continuously between the end faces. The second roll has a smooth peripheral surface. First and second cutting devices are arranged at the first and second end faces of the first roll, respectively. The cutting devices are arranged near open ends of the grooves.

Abstract: A solid waste material comminuting system having a an electric motor for providing rotary motion, a pair of cutter stacks with cutter elements of one stack interleaved with cutter elements of the other, and gear means to transmit the rotary motion of the electric motor to counter-rotate cutter elements of one stack with cutter elements of the other. Each of the cutter stacks comprise comprises a central shaft journaled for rotation and a seal-bearing assembly/module at each end of the central shafts. Each bearing assembly/module comprises an end housing, and a pair of insertable pre-assembled seal-bearing elements/assemblies mountable in each of said end housings. One seal-bearing element/assembly has a thru-hole for journaling a first shaft for rotation and a second seal-bearing element/assembly has a thru-hole for journaling a second shaft for rotation.