Abstract: Method and apparatus for coordinating the rate of feed and the moisture content of the pulp material to the heat quotients of the mechanical energy input in a refiner system in which the moisture-containing pulp material is introduced at an adjustable rate of feed into the central portion of an axially adjustable grinding space defined between a pair of grinding discs which rotate relative to one another within a closed housing and in which grinding space the material is propelled by centrifugal force created by the rotation of the discs in an annular radial path toward the periphery of the discs while being subjected to a grinding operation in an environment of steam generated by the heat produced by friction in the grinding space.

Abstract: In a clutch or brake mechanism of the type comprising two parts in coaxial relationship and an armature co-rotatably coupled with one of the parts and movable under magnetic forces for frictionally engaging the other part, a resilient restoring member for biassing the armature out of engagement with the other part comprises a continuous planar loop having two lobe portions which engage lugs bent from the plane of the armature and interconnecting portions which engage shoulders provided on said one part.

Abstract: A quieter, more rugged, more servicable and more versatile pneumatic fastener driving tool having an improved pneumatic exhaust dampening device, a more secure mounting between the magazine and the driving chamber, a quick-release chamber door system for swift access to the driving chamber, and an arrangement for positioning the magazine in a plurality of angles to the tool housing.

Abstract: A characteristic feature of the proposed device for preparing fibre-filled polymeric compositions having a fibre-chopping mechanism within a blender chamber and formed by a stationary plate with a draw-nozzle having a sharpened lip and by a rotary cutter adjacent to said plate, both the cutter and the sharpened lip establishing the chopping zone for the fibre passing through the draw nozzle. The cutter, while rotating, produces a vortex-type turbulent air flow, wherein the chopped fibre is intermixed with the polymer. The draw-nozzle communicates with the intake pipe for the fibre to feed through the draw-nozzle to the chopping zone.

Abstract: An apparatus for breaking up and separating waste glass to obtain cullet comprising a grizzly made up of parallel bars arranged at a spacing smaller than the minimum width of projection of three-dimensional extraneous matter and auxiliary parallel bars disposed over one surface of the grizzly and arranged at right angles to the bars to form a lattice, the diagonal dimension of the openings of the lattice being smaller than the maximum width of projection of planar extraneous matter. The lattice is in the form of a rotatable drum with the grizzly positioned on the inner side of the its peripheral portion. The drum-shaped lattice has scraper plates attached to its inner periphery and an inlet for the waste glass and an outlet for the extraneous matter at its opposite ends respectively. The parallel bars can be arranged either annularly or axially with the auxiliary parallel bars being arranged oppositely.

Abstract: Method and apparatus for minimizing steam consumption in the production of pulp used for the manufacture of fiberboard and the like, in which chips of cellulosic material are ground in a defibrator or refiner in an environment of saturated steam above 100.degree. C and corresponding steam pressures. The chips are normally presteamed with atmospheric steam separated from the pulp at the discharge end of the defibrating process to a temperature between 90.degree. C and 100.degree. C and compressed and dewatered to a dryness of at least 50% and then passed into a preheater which forms part of the defibrating or refining apparatus, where the compressed and dewatered chips are heated to the desired defibrating or refining temperature, usually ranging between 130.degree. C and 200.degree.

Abstract: The stock pulper is provided with a means for adjusting the spacing between the arms of the rotor and the screen. In one embodiment, the adjustment can be made from without the stock pulper while in another embodiment, the adjustment can be made from within and without the stock pulper.

Abstract: A grinding mill of the kind comprising a generally cylindrical grinding chamber defined by a screen having a shaft supporting a plurality of grinding hammers rotatable therein and being enclosed in a chamber to which suction is applied characterized by the provision of instrumentality for sensing the pressure within the enclosure surrounding the screen and actuating a safety device in the event that the pressure falls below a pre-determined value.

Abstract: Multiple cutting discs are fixed in spaced-apart positions on each of two side-by-side counterrotating shafts so that peripheral portions of the discs on each shaft extend into the spaces between discs on the opposite shaft. Each disc has a smooth cylindrical peripheral surface which meets opposed sidewalls at sharp continuous cutting edges. The clearance between adjacent discs on opposed shafts is small so that their cutting edges coact to shear material fed into the bight between opposed counterrotating discs in their feed-through direction. Removable infeed teeth project from the peripheral surface of each disc at circumferentially spaced positions to help feed material into the bight between opposed discs. Material shredded by the discs falls onto a slowly rotating screening drum encircling the disc assembly. The smallest shredded pieces pass through such drum onto a discharge conveyor.

Abstract: An improved waste disposer having shredding means in a comminution chamber and a rotor rotatable within the chamber. Freely rotating impellers are provided on the rotor which rotate as the rotor is rotated. Each impeller includes at least one main cutting blade adapted to cooperate with the shredding means to comminute waste in the chamber. Each impeller also includes one or more subsidiary cutting blades for assisting in grinding such waste. The blades on one impeller are mounted in a mirror image relationship to the blades on the other impeller to provide improved comminution of the waste.

Abstract: A fastener driving gun with a driving piston actuated by a cartridge to drive a fastener. The piston has an elongated shank with a tapered surface which engages a cooperating surface of the barrel, in the forward position of the piston, to prevent ejection of any substantial portion of the piston in the event of piston breakage. The taper of the piston can be 3% or less.

Abstract: An apparatus for making cellulose insulation including auger feed and metering devices for chemical additives for discharging a measured quantity of such additives into an initial grinder which receives raw paper from a supply source so that an accurately measured proportion of additive will be effectively combined with the paper in the initial grinder. Twin augers convey the combined paper product and chemical additive to a final grinder and an auger conveyor conveys the product to a bagger hopper with twin augers then conveying the product to a bagging station.

Abstract: Disclosed is apparatus for separating and comminuting solid particles suspended in a fluid stream. Pumpable slurries containing solid bodies suspended in a liquid are separated into two streams with the larger bodies concentrated in one stream. The stream containing the larger bodies is passed through a mill which accelerates the stream and directs the accelerated stream against a stationery wall. The high speed bodies are fractured by impact with the wall and returned to a mixing vat to be mixed with the remainder of the slurry.

Abstract: A roller mill assembly includes a separator disposed above a roller mill housing, and an exhaust air duct above the separator. The sieve is movable horizontally from between the mill housing and the exhaust air duct on a crane track.

Abstract: A rotary comminuting apparatus adjustable to reduce either hard or soft materials includes a segmented perforated semi-cylindrical grate partially surrounding the lower portion of the rotor. The grate segments are pivotally supported on a common axle parallel to the axis of the rotor. The opposite ends of the segments are each supported by a hydraulic jack and the jacks have a common connection to a motor pump unit to pivot the grates from a lower position concentric with the rotor to an upper position in which the outer edge is closer to the rotor surface than the pivot edge.

Abstract: The present invention pertains to the preparation of a stable coal/water slurry by particulating the coal; classifying the coal into two parts on the basis of specific gravity; discarding the ash-rich residue; classifying the lesser specific gravity part of the coal from the preceding classification into two parts; classifying the lesser specific gravity part of the coal from the preceding classification into three parts and grinding the heaviest part to the most fine particles, the next-to-heaviest part to less fine particles, and the lightest part to least fine particles; grinding the coal from the next-to-last classification finer than the heaviest part of the coal of the preceding classification; and combining the coal of the preceding two classifications with water to form a slurry.

Abstract: A method and an apparatus for joining plastic brush bristles with plastic brush backs provides for heating the tips of brush bristle strands until they are soft and heating zones of the plastic brush backs to which the bristles will be mounted until they are soft. Thereafter, the soft tips of the bristles are brought into contact with the soft zones of the brush backs to fuse the bristles to the brush backs. In the particular structure and method of the machine of this invention, two relatively movable plates alternately clamp to and unclamp from indeterminant-length bristle strands to jog the strand ends into contact with the brush backs. One of the plates carries a cutting blade which cuts the strands into bristle lengths once their tips are fastened to the brush backs.

Abstract: A "fluid energy" mill comprising a generally arcuate or torroidal housing in which a centrifugally-whirled circulating stream of high pressure gaseous fluid is used as a grinding medium for particulate material having relatively large particle sizes; the mill having a by-pass duct leading from a classification zone where lighter particles are separated from heavier particles to a grinding chamber; the by-pass duct acting as a passage for the heavier particles back to the grinding chamber where they are mixed with newly entering particulate material fed to the grinding chamber; and a passage in the median portion of the by-pass duct connecting with a separator for removing the heaviest particles from the by-pass duct.

Abstract: A cylindrical working chamber in stock reducing apparatus features opposite ends which are open to the atmosphere so that a fan in the chamber outlet draws atmospheric air into the chamber through the open ends thereof, thence through stock in a turning and centrifugally maintained annular stream on the peripheral chamber wall as it passes over a sizing screen at the chamber outlet, and finally through the screen and following chamber outlet.

Abstract: A safety device, for a powder-actuated tool, which prevents the tool from discharging as the result of accidental impact or dropping. A moveable blocking member retains the hammer in the cocked position, despite disengagement of the sear, until displaced to an inoperative position by manipulation of the trigger.